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SPX5205 SPX5205
150 mA, Low-Noise LDO Voltage Regulator
(Preliminary Information)
FEATURES
* * * * * * * * * * Low Noise Output LDO 1% Initial Accuracy At 150mA Very Low Quiescent Current Low Dropout Voltage (210mV At 150mA) Current & Thermal Limiting Reverse-Battery Protection Wide Range of Fix Output Voltages 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, 4.5V, & 5.0V Zero Off-Mode Current Small 5-Pin SOT-23 Pin Compatible to MIC5205/MAX8877 (Fixed Option Only)
APPLICATIONS
* * * * * * * * * * PDA Battery Powered Systems Cellular Phone Cordless Telephones Radio Control Systems Portable/Palm Top/Notebook Computers Portable Consumer Equipment Portable Instrumentation Bar Code Scanners SMPS Post-Regulator
PRODUCT DESCRIPTION
The SPX5205 is an excellent choice for use in battery-powered applications, and where power conservation is desired. Such as: cellular/ cordless telephones, radio control systems, and portable computers. This device is a positive voltage regulator with very low dropout voltage and low output noise. It uses very little quiescent current of 750 A at 100 mA output load. VOUT tolerance is less than 1% with a compensated temperature coefficient. Many fixed output voltages, as listed below, or an adjustable version are available in a small 5-pin SOT-23 package. Other key features include: Zero off-mode current, protection against reversed battery, thermal and current limiting.
MARKING INFORMATION
Voltage 1.8 2.5 2.8 3.0 3.3 Marking R1XX R2XX R3XX R5XX R6XX Voltage 4.0 4.5 5.0 ADJ Marking R7XX R8XX RBXX RCXX
VOUT 5
PIN CONNECTIONS
Top View
BYP 4 2 3
Top View
VOUT 5 ADJ/BYP 4 2 3
SPX5205
1
SPX5205
1
VIN GND EN
VIN GND EN
Fixed Output Voltage
Adjustable Output Voltage
Rev. 10/24/00
SPX5205
ABSOLUTE MAXIMUM RATINGS
Thermal Shutdown .................................... Internally Limited Lead Temp. (Soldering, 5 Seconds) ............................ 260C Operating Junction Temperature Range ..... -40C to +125C Input Supply Voltage........................................-20V to +20V Enable Input Voltage........................................-20V to +20V
RECOMMENDED OPERATING CONDITIONS
Input Voltage................................................. +2.5V to +16V Operating Junction Temperature Range ..... -40C to +125C Enable Input Voltage............................................. 0V to VIN SOT-23-5 (JA) ..................................................... See Note 1
ELECTRICAL CHARACTERISTICS
TJ = 25C, VIN = VOUT + 1V, IL = 100A, CL = 1F, and VENABLE > 2.4V. Unless otherwise specified boldface applies over the junction temperature range Parameter Test Conditions Typ Min Max Units
Output Voltage Tolerance (VOUT) Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (See Note 2) (VIN - VO) IL = 100 A IL = 500 A VIN = VOUT + 1V to 16V VIN = VOUT + 1V to 16V IL = 0.1mA to 150mA IL = 0.1mA to 150mA IL = 100 A IL = 50 mA IL = 100 mA IL = 150 mA Quiescent Current (IGND) Ground Pin Current (IGND) VENABLE < 0.6V VENABLE < 0.25V IL = 100 A IL = 50 mA IL = 100 mA IL = 150 mA Ripple Rejection (PSRR) Current Limit (ILIMIT) Output Noise (eNO) Input Voltage Level Logic Low (VIL) Input Voltage Level Logic High (VIL) ENABLE Input Current 57 0.03 0.1 30 140 180 210 <1 80 350 750 1300 55 360 390 -1 -2 +1 +2 0.1 0.2 0.2 0.5 50 70 190 230 250 300 275 350 1 5 125 150 600 800 1000 1500 1900 2500 500 %VNOM ppm/C %/V %
mV
A
A dB mA VRMS V
VOUT = 0V IL = 50mA, CL = 1F 10Hz - 100Khz.) OFF ON VIL < 0.6V VIH > 2.0V
0.6 2.0 0.01 2 2 20
A
Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ (max), the junction to ambient thermal resistance, and the ambient, JA, and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is given: PD (max) = (TJ (max) - TA)/JA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The JA of the SPX5205 is 220oC/W mounted on a PC board. Note 2: Not apply to 1.8V version.
Rev. 10/24/00
SPX5205
TYPICAL APPLICATION
VIN
1
5
VOUT
+ +
GND 2
1.0uF
SPX5205
3 EN
4 BYP (Optn)
ENABLE may be tied directly to VIN
Rev. 10/24/00
SPX5205
Application Hints
The SPX5205 requires an output capacitor for device stability. The value required varies greatly depending upon the application circuit. The high frequency characteristics of electrolytic capacitors depend greatly on the type and also on the manufacturer. Sometimes bench testing is the only means to determine the proper capacitor type and value. The high quality 2.2F aluminum electrolytic capacitor covers all general application circuits; this stability can be obtained with a tantalum electrolytic value of 1F. In general, linear regulator stability decreases with higher output currents. In most applications the SPX5205 is operating at few milliamps. In these applications the output capacitance can be further reduced. For example, when the regulator is running at 10mA output current the output capacitance value is half compared to the same regulator that is running at 150mA. With the SPX5205 adjustable regulator, the minimum value of output capacitance is a function of the output voltage. The value decreases with higher output voltages, since the closed loop gain is increased.
Typical Applications Circuits The SPX5205 provides access to the internal reference. A 10F capacitor on the BYP pin will provide a significant reduction in output noise. This pin may be left unconnected if the output noise is not a major concern. The SPX5205 start-up speed is inversely proportional to the size of this capacitor. Applications requiring a slow ramp-up of output voltage should consider larger values of CBYP. If the rapid turn-ON is necessary, omit bypass capacitor. Figure 1 shows SPX5205 standard application circuit. The EN pin is pulled high (>2.0V) to enable the regulator. To disable the regulator, EN < 0.6V.
V IN GND EN Hi-ON Lo-OFF 1 2 3 SPX5205 4 BYP (Optn) 5 + V OUT
+
Top View
Fig. 1
The SPX5205 in figure 2 shows adjustable output voltage configuration. Two resistors set the output voltage. The formula for output voltage is: R1 VOUT = 1.235 x 1+ R2 Resistor values are not critical as the ADJ pin has high input impedance, for best results use resistors of 47k or less. A capacitor from ADJ to ground will provide improved noise performance.
V IN + GND EN Hi-ON Lo-OFF
1 2 3 SPX5205
5 R1 R2 +
VOUT
4 ADJ
Byp (Optn)
Top View
Fig. 2
Rev. 10/24/00
SPX5205
PACKAGE DRAWING SOT-23-5L (M5)
D B (5 PLACES)
E
H
e e1
A
A2
A1 L
SYMBOL MILLIMETERS INCHES
C
MIN. 0.90 0 0.30 0.10 2.70 1.40 1.70 2.50
MAX 1.30 0.10
MIN. .035 0 .012 .004 .106 .055 .066 .098
MAX. .051 .004 .019 .0137 .122 .071 .082 .118
NOTE: 1. REFER TO APPLICABLE 2. CONTROLLING DIMENTION : MILLIMETER 3. PACKAGE SURFACE FINISHING TO BE SMOOTH FINISH.
A A1 A2 B C D E e e1 H L
0.80 REF 0.50 0.35 3.10 1.80 2.10 3.00
.0315 REF
0.95 BSC.
.037 BSC.
MIN 0.2
MIN .0078
Rev. 10/24/00
SPX5205
Ground Current Vs. Load Current
1.40 1.20 1.00 110 100 90 I Gnd (uA) 80 70 60 50 40 30 0 50 IL (mA) 100 150 4 6 8 10 Vin (V) 12 14 16 Vo = 3.3V IL = 100uA CL = 1uF
Ground Current Vs. Input Voltage
I Gnd (mA)
0.80 0.60 0.40 0.20 0.00 3.3V Device Vin = 4.3V CL=1uF
Ground Current Vs. Load Current (in Dropout)
3.340 2.00 3.335 3.330 1.50 I Gnd (mA) Vout (V) 3.325 3.320 3.315 3.310 3.305 0.50 3.3V Device Vin = 4.3V CL = 1uF 0 50 IL (mA) 100 150 3.300 3.295 3.290 4
Output Voltage Vs. Input Voltage
3.3V Device IL = 100uA CL = 1uF
1.00
0.00
6
8
10 Vin (V)
12
14
16
Dropout Voltage Vs. Load Current
3.310 200 3.308 Dropout (mV) 150 Vout (V) 3.306
Output Voltage Vs. Load Current
3.3V Device Vin = 4.3V CL = 1uF
100 Vin = 4.3V Vo = 3.3V CL = 1uF
3.304
50
3.302
0 0 50 IL ( mA) 100 150
3.300 0 50 IL ( mA) 100 150
Rev. 10/24/00
SPX5205
Ground Current Vs. Temperature
90.0 950
Ground Current Vs. Temperature
80.0
850 Vin = 4.3V Vout = 3.3V CL = 1uF IL = 100uA
I Gnd (uA)
70.0
I Gnd (uA)
750
650 Vin = 4.3V Vout = 3.3V CL= 1uF IL = 100mA
60.0 550
50.0 -40 -20 0 20 40 60 80 100 120
450 -40 -20 0 20 40 60 80 100 120
Temperature (Degree C)
Temperature (Degree C)
Ground Current in Dropout Vs. Temperature
2.30 2.20 2.10 I Gnd (mA) 2.00 1.90 1.80 1.70 1.60 1.50 1.40 -40 -20 0 20 40 60 80 100 120 Temperature (Degree C) Vin = 4.3V Vout = 3.3V CL = 1uF IL = 150mA
3.400 3.380 3.360 3.340 3.320 Vout (V) 3.300 3.280 3.260 3.240 3.220 3.200 -40
Output Voltage Vs Temperature
Vin = 4.3V Vout = 3.3V CL = 1uF
-20
0
20
40
60
80
100
120
Temperature (Degree C)
Enable Voltage, On Threshold Vs. Input Voltage
1.60 1.50 VEN, On Threshold (V) 1.40 1.30 1.20 1.10 1.00 0.90 0.80 4 6 8 10 Vin (V) 12 14 16 Vout = 3.3V IL = 100uA CL = 1uF
Rev. 10/24/00
SPX5205
Rev. 10/24/00
SPX5205
ORDERING INFORMATION Ordering No.
SPX5205M5 SPX5205M5-1.8 SPX5205M5-2.5 SPX5205M5-2.8 SPX5205M5-3.0 SPX5205M5-3.3 SPX5205M5-4.0 SPX5205M5-4.5 SPX5205M5-5.0
Output Voltage
Adj 1.5V 2.5V 2.8V 3.0V 3.3V 4.0V 4.5V 5.0V
Packages
5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and Main Offices: 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 935-7600 FAX: (408) 934-7500
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
Rev. 10/24/00

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