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MIC2205
2MHz PWM Synchronous Buck Regulator with LDO Standby Mode
General Description
The Micrel MIC2205 is a high efficiency 2MHz PWM synchronous buck (step-down) regulator that features a LOWQTM LDO standby mode that draws only 18A of quiescent current. The MIC2205 allows an ultra-low noise, small size, and high efficiency solution for portable power applications. In PWM mode, the MIC2205 operates with a constant frequency 2MHz PWM control. Under light load conditions, such as in system sleep or standby modes, the PWM switching operation can be disabled to reduce switching losses. In this light load LOWQTM mode, the LDO maintains the output voltage and draws only 18A of quiescent current. The LDO mode of operation saves battery life while not introducing spurious noise and high ripple as experienced with pulse skipping or bursting mode regulators. The MIC2205 operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions. The MIC2205 is available in the 3mm x 3mm MLF10L package with a junction operating range from -40C to +125C. Data sheets and support documentation can be found on Micrel's web site at www.micrel.com.
Features
* 2.7 to 5.5V supply voltage * Light load LOWQTM LDO mode 18A quiescent current Low noise, 75Vrms * 2MHz PWM mode Output current to 600mA >95% efficiency 100% maximum duty cycle * Adjustable output voltage option down to 1V Fixed output voltage options available * Ultra-fast transient response * Stable with 1F ceramic output capacitor * Fully integrated MOSFET switches * Micropower shutdown * Thermal shutdown and current limit protection * Pb-free 3mm x 3mm MLF-10L package * -40C to +125C junction temperature range
Applications
* Cellular phones * PDAs * USB peripherals
____________________________________________________________________________________________________
Typical Application
MIC2205 V IN 2.7V to 5.5V C1 1F
8 4 6
VIN AVIN EN LOWQ BIAS
SW LDO
9 2
2.2H VOUT R1 100k R2 125k C3 100pF C4 2.2F
100 95 90 EFFICIENCY (%) 85 80 75 70 65 60 55 50 0
1.8V OUT Efficiency
VIN = 3V VIN = 3.6V VIN = 4.2V
LowQ C2 0.1F
7 3
FB
5
PGND AGND GND
10 1
GND
Adjustable Output Buck Regulator with LOWQTM Mode
100 200 300 400 500 600 OUTPUT CURRENT (mA)
Patent Pending LOWQ is a trademark of Micrel, Inc Micrel, Inc * 2180 Fortune Drive * San Jose, Ca 95131 * USA * tel +1 (408) 944-0800 * fax +1 (408) 474-1000 * http://www.micrel.com
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MIC2205
Ordering Information
Part Number MIC2205-1.3YML MIC2205-1.38YML MIC2205-1.5YML MIC2205-1.58YML MIC2205-1.8YML MIC2205-1.85YML MIC2205YML
Note: 1. Other Voltage options available. Contact Micrel for details.
Output Voltage(1) 1.3V 1.38V 1.5V 1.58V 1.8V 1.85V Adj.
Junction Temp. Range -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C
Package 3x3 MLF-10L 3x3 MLF-10L 3x3 MLF-10L 3x3 MLF-10L 3x3 MLF-10L 3x3 MLF-10L 3x3 MLF-10L
Lead Finish Pb-free Pb-free Pb-free Pb-free Pb-free Pb-free Pb-free
Pin Configuration
AGND 1 LDO 2 BIAS 3 AVIN 4 FB 5 EP 10 PGND 9 SW 8 VIN 7 LOWQ 6 EN
3mm x 3mm MLF-10L (ML)
Pin Description
Pin Number 1 2 3 4 5 Pin Name AGND LDO BIAS AVIN FB Pin Function Analog (signal) Ground. LDO Output (Output): Connect to VOUT for LDO mode operation. Internal circuit bias supply. Must be de-coupled to signal ground with a 0.1F capacitor and should not be loaded. Analog Supply Voltage (Input): Supply voltage for the analog control circuitry and LDO input power. Requires bypass capacitor to GND. Feedback. Input to the error amplifier. For the Adjustable option, connect to the external resistor divider network to set the output voltage. For fixed output voltage options, connect to VOUT and an internal resistor network sets the output voltage. Enable (Input). Logic low will shut down the device, reducing the quiescent current to less than 5A. Enable LDO Mode (Input): Logic low enables the internal LDO and disables the PWM operation. Logic high enables the PWM mode and disables the LDO mode. Supply Voltage (Input): Supply voltage for the internal switches and drivers. Switch (Output): Internal power MOSFET output switches. Power Ground. Ground, backside pad.
6
EN _____ LOWQ VIN SW PGND GND
7 8 9 10 EP
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Absolute Maximum Ratings(1)
Supply Voltage (VIN) ............................................ +6V Output Switch Voltage (VSW) ............................... +6V Output Switch Current (ISW) ................................... 2A Logic Input Voltage (VEN,VLOWQ) .............. -0.3V to VIN Storage Temperature (Ts)................ -60C to +150C ESD Rating(3) ....................................................... 3kV
Operating Ratings(2)
Supply Voltage (VIN)............................+2.7V to +5.5V Logic Input Voltage (VEN,VLOWQ) .............. -0.3V to VIN Junction Temperature (TJ) .............. -40C to +125C Junction Thermal Resistance 3x3 MLF-10L (JA) ................................... 60C/W
Electrical Characteristics (4)
VIN = VEN = VLOWQ =3.6V; L = 2.2H; COUT = 2.2F; TA = 25C, unless noted. Bold values indicate -40C< TJ < +125C Parameter Supply Voltage Range Under-Voltage Lockout Threshold UVLO Hysteresis Quiescent Current, PWM mode Quiescent Current, LDO mode Shutdown Current [Adjustable] Feedback Voltage [Fixed Output] Voltages FB pin input current Current Limit in PWM Mode Output Voltage Line Regulation Output Voltage Load Regulation, PWM Mode Output Voltage Load Regulation, LDO Mode Maximum Duty Cycle PWM Switch ONResistance Oscillator Frequency LOWQ threshold voltage LOWQ Input Current Enable Threshold Enable Input Current LDO Dropout Voltage IOUT = 50mA Note 5 0.5 VFB = 0.9 * VNOM VOUT > 2V; VIN = VOUT+300mV to 5.5V; ILOAD= 100mA VOUT < 2V; VIN = 2.7V to 5.5V; ILOAD= 100mA 20mA < ILOAD < 300mA 100A < ILOAD < 50mA VLOWQ = 0V VFB 0.4V ISW = 50mA VFB = 0.7VFB_NOM (High Side Switch) ISW = -50mA VFB = 1.1VFB_NOM (Low Side Switch) 1.8 0.5 100 0.4 0.4 2 0.85 0.1 0.85 0.1 110 2.2 1.3 2 1.3 2 0.75 VFB = 0.9 * VNOM (not switching) VLOWQ = 0V;IOUT = 0mA VEN = 0V 1% 2% (over temperature) Nominal VOUT tolerance 0.99 0.98 -1 -2 1 1 0.13 0.2 0.1 0.5 0.2 1.85 (turn-on) Condition Min 2.7 2.45 2.55 100 690 16 0.01 1 900 29 5 1.01 1.02 +1 +2 Typ Max 5.5 2.65 Units V V mV A A A V % nA A % % % % MHz V A V A mV
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MIC2205
Parameter Output Voltage Noise LDO Current Limit Over-Temperature Shutdown Over-Temperature Hysteresis
Notes 1. 2. 3. 4. 5.
Condition LOWQ = 0V; COUT = 2.2F, 10Hz to 100kHz LOWQ = 0V; VOUT = 0V (LDO Mode)
Min
Typ 75
Max
Units Vrms mA C C
60
120 160 20
Exceeding the absolute maximum rating may damage the device. The device is not guaranteed to function outside its operating rating. Devices are ESD sensitive. Handling precautions recommended. Human body model: 1.5k in series with 100pF. Specification for packaged product only. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value that is initially measured at a 1V differential. For outputs below 2.7V, the dropout voltage is the input-to-output voltage differential with a minimum input voltage of 2.7V.
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Typical Characteristics - PWM Mode
Bode Plot
80 70 60 50 40 Phase 144 126
100 95 EFFICIENCY (%) 90 85 80 75 70 65 60 55 50 0
2.5V OUT Efficiency
VIN = 3V EFFICIENCY (%) VIN = 3.6V VIN = 4.2V
100 95 90 85 80 75 70 65 60 55 50
1.8V OUT Efficiency
VIN = 3V VIN = 3.6V VIN = 4.2V
108 90 72 54 36 18 0 -18 -36 1E+6 1M PHASE ()
GAIN (dB)
30 20 VIN = 3.6V 10 VOUT = 1.8V 0 L = 2.2 H Gain COUT = 2.2 F -10 C = 120pF FF -20 1E+2 1E+3 1E+4 1E+5 100 1k 10k 100k FREQUENCY (Hz)
100 200 300 400 OUTPUT CURRENT (mA)
0
100 200 300 400 500 600 OUTPUT CURRENT (mA)
95 90 EFFICIENCY (%) 85 80 75 70 65 60 55 50 0
1.5V OUT Efficiency
VIN = 3V EFFICIENCY (%) VIN = 3.6V VIN = 4.2V
95 90 85 80 75 70 65 60 55 50
1.38V OUT Efficiency
VIN = 3V EFFICIENCY (%) VIN = 3.6V VIN = 4.2V
95 90 85 80 75 70 65 60 55 50
1.2V OUT Efficiency
VIN = 3V VIN = 3.6V VIN = 4.2V
100 200 300 400 OUTPUT CURRENT (mA)
0
100 200 300 400 OUTPUT CURRENT (mA)
0
100 200 300 400 OUTPUT CURRENT (mA)
90 85 EFFICIENCY (%) 80 75 70 65 60 55 50 0
1.0V OUT Efficiency
VIN = 3V FEEDBACK VOLTAGE (V) VIN = 3.6V VIN = 4.2V
Load Regulation
1.010
QUIESCENT CURRENT (A) 900 800 700 600 500 400 300 200 100 0 2.7
Quiescent Current vs. Supply Voltage
1.008 1.006 1.004 1.002 1.000 0.998 0.996 0.994 0.992 0.990 0 VIN = 3.6V LowQ = VIN 100 200 300 400 OUTPUT CURRENT (mA)
VIN = 3.6V VF B = 0.9V 3.4 4.1 4.8 SUPPLY VOLTAGE (V) 5.5
100 200 300 400 500 600 OUTPUT CURRENT (mA)
Frequency vs. Temperature
2.2 2.15 CURRENT LIMIT (mA) FREQUENCY (MHz) 2.1 2.05 2 1.95 1.9 1.85 VIN = 3.6V 1.8 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) 1200 1000 800 600 400 200
Peak Current Limit vs. Supply Voltage
1.5 ENABLE THRESHOLD (V) 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7
Enable Threshold vs. Supply Voltage
LowQ = VIN 0 2.7 3.4 4.1 4.8 SUPPLY VOLTAGE (V)
5.5
0.6 LowQ = V IN 0.5 2.7 3.4 4.1 4.8 SUPPLY VOLTAGE (V)
5.5
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Typical Characteristics - PWM Mode (cont.)
Turn-On Time vs. Supply Voltage
100 90 TURN-ON DELAY (s) 80 70 60 50 40 30 20 10 V = 3.6V IN 0 2.7 3.4 4.1 4.8 SUPPLY VOLTAGE (V)
5.5
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Typical Characteristics - LDO Mode
PSRR vs. Input Voltage
80 80
PSRR vs. Output Current
DROPOUT VOLTAGE (mV) IOUT = 0A IOUT = 100 A 250 200 150 100 50
Dropout vs. Output Current
60 PSRR (dB) PSRR (dB)
60
40
4.2V 3V
40
20 IOUT = 50mA VOUT = 1.8V 3.6V COUT = 2.2 F 0 1E-2 1E-1 1E+0 1E+1 1E+2 1E+3 1 10 1k 0.01 0.1 100 FREQUENCY (Hz)
20 VIN = 3.6 VOUT = 1.8V COUT = 2.2 F I OUT = 50mA 0 1E-2 1E-1 1E+0 1E+1 1E+2 1E+3 1 10 1k 0.01 0.1 100 FREQUENCY (Hz)
VOUT = 3.3V 0 0 20 40 60 80 100 OUTPUT CURRENT (mA)
Current Limit vs. Supply Voltage
140 DROPOUT VOLTAGE (mV) CURRENT LIMIT (mA) 120 100 80 60 40 20 LowQ = 0V 0 2.7 3.4 4.1 4.8 SUPPLY VOLTAGE (V) 5.5 160 140 120 100 80 60 40 20
Dropout Voltage vs. Temperature
80 DROPOUT VOLTAGE (mV) 70 60 50 40 30 20 10
Dropout Voltage vs. Temperature
0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
VOUT = 3.3V IOUT = 50mA LowQ = 0V
0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
VOUT = 3.3V IOUT = 25mA LowQ = 0V
Dropout Voltage vs. Temperature
40 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 35 30 25 20 15 10 5 VOUT = 3.3V IOUT = 10mA LowQ = 0V 9 8 7 6 5 4 3 2 1
Dropout Voltage vs. Temperature
1.836 OUTPUT VOLTAGE (V) 1.827 1.818 1.809 1.800 1.791 1.782 1.773
Output Voltage vs. Temperature
0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
VOUT = 3.3V IOUT = 1mA LowQ = 0V
LowQ = 0V 1.764 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
Enable Threshold Voltage vs. Supply Voltage
1.5 ENABLE THRESHOLD (V) 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 2.7 LowQ = 0V 3.4 4.1 4.8 SUPPLY VOLTAGE (V) 5.5 TURN-ON DELAY (s) 100 90 80 70 60 50 40 30 20 10 0 2.7
Turn-On Time vs. Supply Voltage
25 QUIESCENT CURRENT (A)
Quiescent Current vs. Temperature
IOUT = 50mA 20 15 10 5 VIN = 3.6V LowQ = 0V 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) IOUT = 100 A IOUT = 1mA
VIN = 3.6V LowQ = 0V 3.4 4.1 4.8 5.5 SUPPLY VOLTAGE (V)
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Typical Characteristics - LDO Mode (cont.)
Quiescent Current vs. Temperature
25 QUIESCENT CURRENT (A) QUIESCENT CURRENT (A) 20 15 10 5 0 LowQ = 0V 1 2 3 4 5 SUPPLY VOLTAGE (V) IOUT = 100 A IOUT = 60mA IOUT = 0A 25 24 23 22 21 20 19 18 17 16 15 2.7 QUIESCENT CURRENT (A)
Quiescent Current vs. Supply Voltage
25 24 23 22 21 20 19 18 17 16 15 0
Quiescent Current vs. Output Current
0
IOUT = 100 A LowQ = 0V 3.4 4.1 4.8 5.5 SUPPLY VOLTAGE (V)
VIN = 3.6V LowQ = 0V 20 40 60 80 100 OUTPUT CURRENT (mA)
Output Voltage vs. Output Current
1.836 OUTPUT VOLTAGE (V) 1.827 1.818 1.809 1.8 1.791 1.782 1.773 1.764 0 VIN = 3.6V VOUT =1.8V LowQ = 0V 20 40 60 80 100 OUTPUT CURRENT (mA)
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Functional Diagram
VIN AVIN
6
P-Channel Current Limit
BIAS
HSD
SW PWM Control Anti-Shoot Through
LSD
VOUT
COUT N-Channel Current Limit R1
EN Enable and Control Logic LOWQ
Bias, UVLO, Thermal Shutdown
FB
Soft Start
EA
1.0V LDO Block
R2
LDO Current Limit
EA
1.0V LDO
SGND
PGND
MIC2205 Block Diagram
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Functional Characteristics
Load Transient PWM Mode
LowQ = VIN
Output Voltage AC Coupled (50mV/div)
Output Current (100mA/div)
Time 20 s/div
Enable Transient PWM Mode
LowQ = 0V
VOUT (50mV/div)
ENABLE (1V/div)
Time 40 s/div
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Functional Characteristics
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Functional Description
VIN VIN provides power to the MOSFETs for the switch mode regulator section, along with the current limiting sensing. Due to the high switching speeds, a 1F capacitor is recommended close to VIN and the power ground (PGND) pin for bypassing. Please refer to layout recommendations. AVIN Analog VIN (AVIN) provides power to the LDO section and the bias through an internal 6 Ohm resistor. AVIN and VIN must be tied together. Careful layout should be considered to ensure high frequency switching noise caused by VIN is reduced before reaching AVIN. LDO The LDO pin is the output of the linear regulator and should be connected to the output. In LOWQ mode (LOWQ<1.5V), the LDO provides the output voltage. In PWM mode (LOWQ>1.5V) the LDO pin is high impedance. EN The enable pin provides a logic level control of the output. In the off state, supply current of the device is greatly reduced (typically <1A). Also, in the off state, the output drive is placed in a "tri-stated" condition, where both the high side P-channel Mosfet and the low-side N-channel are in an "off" or non-conducting state. Do not drive the enable pin above the supply voltage. LOWQ The LOWQ pin provides a logic level control between the internal PWM mode and the low noise linear regulator mode. With LOWQ pulled low (<0.5V), quiescent current of the device is greatly reduced by switching to a low noise linear regulator mode that has a typical IQ of 18A. In linear (LDO) mode the output can deliver 60mA of current to the output. By placing LOWQ high (>1.5V), this transitions the device into a constant frequency PWM buck regulator mode. This allows the device the ability to efficiently deliver up to 600mA of output current at the same output voltage. BIAS The BIAS pin supplies the power to the internal power to the control and reference circuitry. The bias is powered from AVIN through an internal 6 resistor. A small 0.1F capacitor is recommended April 2005 12 for bypassing. FB The feedback pin (FB) provides the control path to control the output. For adjustable versions, a resistor divider connecting the feedback to the output is used to adjust the desired output voltage. The output voltage is calculated as follows:
R1 VOUT = VREF x + 1 R2
where VREF is equal to 1.0V. A feedforward capacitor is recommended for most designs using the adjustable output voltage option. To reduce battery current draw, a 100K feedback resistor is recommended from the output to the FB pin (R1). Also, a feedforward capacitor should be connected between the output and feedback (across R1). The large resistor value and the parasitic capacitance of the FB pin can cause a high frequency pole that can reduce the overall system phase margin. By placing a feedforward capacitor, these effects can be significantly reduced. Feedforward capacitance (CFF) can be calculated as follows:
CFF = 1 2 x R1x 160kHz
For fixed options A feed forward capacitor from the output to the FB pin is required. Typically a 100pF small ceramic capacitor is recommended SW The switch (SW) pin connects directly to the inductor and provides the switching current nessasary to operate in PWM mode. Due to the high speed switching on this pin, the switch node should be routed away from sensitive nodes. PGND Power ground (PGND) is the ground path for the high current PWM mode. The current loop for the power ground should be as small as possible and separate from the Analog ground (AGND) loop. Refer to the layout considerations for more details. SGND Signal ground (SGND) is the ground path for the biasing and control circuitry. The current loop for the signal ground should be separate from the Power ground (PGND) loop. Refer to the layout considerations for more details.
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Applications Information
The MIC2205 is a 600mA PWM power supply that utilizes a LOWQTM light load mode to maximize battery efficiency in light load conditions. This is achieved with a LOWQ control pin that when pulled low, shuts down all the biasing and drive current for the PWM regulator, drawing only 18A of operating current. This allows the output to be regulated through the LDO output, capable of providing 60mA of output current. This method has the advantage of producing a clean, low current, ultra low noise output in LOWQTM mode. During LOWQTM mode, the SW node becomes high impedance, blocking current flow. Other methods of reducing quiescent current, such as pulse frequency modulation (PFM) or bursting techniques, create large amplitude, low frequency ripple voltages that can be detrimental to system operation. When more than 60mA is required, the LOWQ pin can be forced high, causing the MIC2205 to enter PWM mode. In this case, the LDO output makes a "hand-off" to the PWM regulator with virtually no variation in output voltage. The LDO output then turns off allowing up to 600mA of current to be efficiently supplied through the PWM output to the load. Input Capacitor A minimum 1F ceramic is recommended on the VIN pin for bypassing. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. A minimum 1F is recommended close to the VIN and PGND pins for high frequency filtering. Smaller case size capacitors are recommended due to their lower ESR and ESL. Please refer to layout recommendations for proper layout of the input capacitor.
Output Capacitor Even though the MIC2205 is optimized for a 2.2F output capacitor, output capacitance can be varied from 1F to 4.7F. The MIC2205 utilizes type III internal compensation and utilizes an internal high frequency zero to compensate for the double pole roll off of the LC filter. For this reason, larger output capacitors can create instabilities. X5R or X7R dielectrics are recommended for the output capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. In addition to a 2.2F, a small 10nF is recommended close to the load for high frequency filtering. Smaller case size capacitors are recommended due to there lower ESR and ESL. Inductor Selection The MIC2205 is designed for use with a 2.2H inductor. Proper selection should ensure the inductor can handle the maximum average and peak currents required by the load. Maximum current ratings of the inductor are generally given in two methods; permissible DC current and saturation current. Permissible DC current can be rated either for a 40C temperature rise or a 10% to 20% loss in inductance. Ensure that the inductor selected can handle the maximum operating current. When saturation current is specified, make sure that there is enough margin that the peak current will not saturate the inductor. Peak inductor current can be calculated as follows:
V VOUT 1 - OUT VIN + 2x f xL
IPK = IOUT
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Layout Recommendations
VOUT L1 GND CBIAS VIN MIC2205 CFF R1 R2 Top LowQ EN
VOUT
L1
GND CBIAS
VIN MIC2205 CFF R1 R2
Bottom
Note: The above figures demonstrate the recommended layout for the MIC2205 adjustable option.
LowQ EN
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MIC2205
MIC2205
V IN 2.7V to 5.5V C1 1F
8 4 6
VIN AVIN EN LOWQ BIAS
SW LDO
9 2
2.2H VOUT R1 100k R2 125k C3 100pF C4 2.2F
LowQ C2 0.1F
7 3
FB
5
PGND AGND GND
10 1
GND
Adjustable Output
MIC2205
V IN 2.7V to 5.5V C1 1F
8 4 6
VIN AVIN EN LOWQ BIAS
SW LDO
9 2
2.2H VOUT C3 100pF C4 2.2F
LowQ C2 0.1F
7 3
FB
5
PGND AGND GND
10 1
GND
Fixed Output
Item
C1 C4 C3 C2 L1 R1 R2
(1) (1)
Part Number
06036D105MAT2 GRM185R60J105KE21D 06036D225MAT2 GRM188R61A225KE34 VJ0402A101KXAA 0201ZD103MAT2 GRM033R10J103KA01D LQH32CN2R2M53K CDRH2D14-2R2 CRCW04021002F CRCW04026652F CRCW04021243F CRCW04022003F CRCW04024023F
Description
1F Ceramic Capacitor X5R, 6.3V 0603 1F Ceramic Capacitor X5R, 6.3V 0603 2.2F Ceramic Capacitor X5R, 10V 0603 2.2uF Ceramic Capacitor X5R, 10V 0603 100pF Ceramic Capacitor 10nF Ceramic Capacitor 6.3V 0201 10nF Ceramic Capacitor 6.3V 0201 2.2H Inductor 97m 3.2mmx2.5mmx1.55mm 2.2H Inductor 94m 3.2mmx3.2mmx1.55mm 100k 1% 0402 66.5 k 1% 0402 For 2.5VOUT 124 k 1% 0402 For 1.8 VOUT 200 k 1% 0402 For 1.5 VOUT 402 k 1% 0402 For 1.2 VOUT Open For 1.0 VOUT 2MHz Synchronous Buck Regulator with LOWQ Mode
TM
Manufacturer
AVX (4) Murata AVX (4) Murata Vishay
(3)
Qty
1 1 1 1 1
AVX (4) Murata Murata (2) Sumida Vishay Dale
(3) (3) (4)
1
Vishay Dale (3) Vishay Dale (3) Vishay Dale (3) Vishay Dale (3) Vishay Dale
U1
Notes:
MIC2205BML
Micrel, Inc.
(5)
1
1. For adjustable version only. 2. Sumida Tel: 408-982-9660 3. Murata Tel: 949-916-4000 4. Vishay Tel: 402-644-4218 5. Micrel, Inc. Tel: 408-944-0800
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Package Information
10-Lead MLFTM (ML)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2004 Micrel, Incorporated.
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