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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Description
The AP7167 is a 1.2A, adjustable output voltage, ultra-low dropout linear regulator. The device includes pass element, error amplifier, band-gap reference, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. A Power-OK (POK) output is available for power sequence control. The characteristics of the low dropout voltage and low quiescent current make it suitable for low to medium power applications, for example, laptop computers, audio and video applications, and battery powered devices. The typical quiescent current is approximately 125A. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions.
Pin Assignments
( Top View )
IN IN POK NC EN
1 2 3 4 5 10 9 8 7 6
OUT OUT FB NC GND
DFN3030-10
( Top View )
The AP7167 are available in DFN3030-10 and SOP-8L packages.
IN IN POK EN 1 2 3 4 8 7 6 5 OUT OUT FB GND
Features
* * * * * * * * * * * * * * * Wide input voltage range: 2.2V - 5.5V 230mV very low dropout at 500mA load 500mV very low dropout at 1A load 3% total accuracy over line, load and temperature Very low quiescent current (IQ): 125A typical Adjustable output voltage range: 0.8V to 5.0V Very fast transient response High PSRR Accurate voltage regulation Current limiting and short circuit protection Thermal shutdown protection Stable with any type output capacitor 4.7F Ambient temperature range -40C to 85 C DFN3030-10 and SOP-8L-EP: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1)
SOP-8L-EP
Applications
* * * * * * Servers and laptops Smart phone and PDA MP3/MP4 Bluetooth headset Low and medium power applications FPGA and DSP core or I/O power
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.
AP7167
Document number: DS31252 Rev. 7 - 2
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK Typical Application Circuit
VIN
IN 100kOhm 1F POK AP7167 FB R2 Enable EN GND OUT R1
VOUT
10F
R VOUT = VREF 1 + 1 R2
Pin Descriptions
Pin Name Pin # DFN3030-10 SOP-8L-EP Description
IN POK EN GND FB OUT NC
1, 2 3 5 6 8 9, 10 4, 7
1, 2 3 4 5 6 7, 8 NA
Voltage input pins, to be tied together externally. Bypass to ground through at least 1F capacitor. Power-OK output, active-high open-drain. Enable input, active high. Ground. Output feedback. Voltage output pins, to be tied together externally. Bypass to ground through at least 4.7F ceramic capacitor. No connection.
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK Functional Block Diagram
IN
Current Limit and Thermal Shutdown
OUT
EN
Gate Driver
FB POK
0.8V
0.744V
GND
Absolute Maximum Ratings
Symbol ESD HBM ESD MM VIN Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage OUT, FB, POK, EN Voltage Continuous Load Current Ratings 4 Unit KV
300 7 VIN + 0.3 Internal Limited -40 ~ 150 -65 ~150 3.1 4.0
V V V C C W W
TJ TST PD
Notes:
Operating Junction Temperature Range Storage Temperature Range Power Dissipation DFN3030-10 (Note 2, 4) SOP-8L-EP (Note 2, 5)
2. Ratings apply to ambient temperature at 25C
Recommended Operating Conditions
Symbol Parameter Min Max Unit
VIN IOUT TA
Input voltage Output Current Operating Ambient Temperature
2.2 0 -40
5.5 1.2 85
V A
C
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK Electrical Characteristics
(TA = 25oC, VIN = VOUT +1V, CIN = 1F, COUT = 10F, VEN = VIN, unless otherwise stated)
Symbol Parameter Test Conditions Min Typ. Max Unit
IQ ISHDN VDropout VREF IFB VOUT
Input Quiescent Current Input Shutdown Current Dropout Voltage FB reference voltage FB leakage Output Voltage Total Accuracy Line Regulation Load Regulation Start-up Time, from EN high to POK high Power Supply Rejection Ratio Current limit Short-circuit Current EN Input Logic Low Voltage EN Input Logic High Voltage EN Input leakage POK output low voltage Output voltage (rising) POK threshold Output voltage POK hysteresis
IOUT= 0 VEN = 0V, IOUT = 0 (Note 3) VOUT 1.5V, IOUT = 0.5A VOUT 1.5V, IOUT = 1A
125 0.1 230 500 0.8
180 1 800 1 3
A A mV mV V A % %/V
-1
0.01
Over line, load and temperature VIN = VOUT +1V to 5.5V, IOUT = 1mA IOUT from 1mA to 1A VEN = 0V to 2.0V, IOUT = 100mA, VIN = 3.3V 1kHz, VIN = 3.3V, VOUT = 1.2V, IOUT = 100mA VOUT = 1.8V, ROUT = 0.5 VIN = 3.3V, VOUT < 0.2V
-3 0.02 -1.5 190 60 1.2 1.6 750
VOUT / VOUT VIN
VOUT / VOUT
1.5
% s dB A mA
tST PSRR ILIMIT ISHORT VIL VIH IEN VOL VPOK_TH_UP VPOK_Hys POK deglitch IPOK_LK TSHDN THYS JA
Notes:
0.4 1.4 VEN = 0V or 5.5V Force 2mA FB (or OUT for fixed version) rising VIN = 3.3V, VOUT = 1.2V 87%
V V A mV Vref Vref s
0.01 100 92% 4% 160
1 200 97%
POK leakage current Thermal shutdown threshold Thermal shutdown hysteresis Thermal Resistance Junction-toAmbient
VPOK = 5.5V
0.01 155 25
1
A
C C
o o
DFN3030-10 (Note 4) SOP-8L-EP (Note 5)
40 27
C/W C/W
3. POK pin must be disconnected from IN pin. 4. Test condition for DFN3030-10: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 6 vias to bottom layer 1.0"x1.5" ground plane. 5. Test condition for SOP-8L-EP: Device mounted on 2" x 2" FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane.
Typical Performance Characteristics
AP7167
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Output Voltage vs. Temperature
3.40
Output Voltage vs. Tem perature
1.30
VOUT = 3.3V
VOUT = 1.2V
3.35
Output Voltage (V)
Output Voltage (V)
1.25
3.30
1.20
3.25
1.15
3.20 -50 -25 0 25 50 75 100 125
1.10 -50 -25 0 25 50 75 100 125
Temperature ( C)
0
Tem perature ( 0C)
Quiescent Current vs. Input Voltage
170
Quiescent Current vs. IOUT Quiescent Current ( A)
170 160 150 140 130 120 110 100 VIN=2.5V VIN=3.3V 0.0 0.2 0.4 0.6 0.8 1.0 1.2
VOUT=3.3V
VOUT=1.8V
Quiescent Current (A)
155
140
125
110
95
Iout=0mA Iout=500mA
80 4.0 4.3 4.6 4.9 5.2 5.5
Input Voltage (V)
IOUT (A)
Quiescent Current vs. Tem perature
170
0.810
Reference Voltage vs. Temperature
Quiescent Current ( A)
155
Reference Voltage (V)
0.805
140
125
0.800
110 VIN=2.2V, Vout=1.0V 95 VIN=3.3V, Vout=1.8V VIN=5.0V, Vout=3.3V 80 -50.0 -25.0 0.0 25.0 50.0 75.0 100.0 125.0
0.795
Vin=2.2V Vin=3.3V Vin=5.5V
0.790 -50 -25 0 25 50 75 100 125
Tem perature ( C)
0
Temperature ( C)
0
Typical Performance Characteristics (Continued)
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Line Regulation
0.10
Load Regulation
0.5 0.4
VOUT=1.8V, IOUT=1mA
VIN=2.2V, VOUT=1.2V,
25C 85C -40C
Change in VOUT (%/V)
Change in VOUT (%)
0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5
0.05
0.00
-0.05
25C 85C -40C
-0.10 3.0
3. 5
4. 0
4. 5
5.0
5.5
0.0
0.4
0.8
1.2
VIN (V)
IOUT (A)
Short Circuit Current vs. Input Voltage
0.77
Short Circuit Current vs. Temperature
0.80
VOUT=1.2V
VOUT=1.2V
Short Circuit Current (A)
0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.69 2.2 2.4 2.6 2.8 3 3.2 3.4
Short Circuit Current (A)
0.75
0.70
0.65
0.60 -50 -25 0 25 50 75
Input Voltage (V)
Temperature ( C)
o
Dropout Voltage vs. IOUT
VOUT=3.3V
700
PSRR -40 -45 -50 PS RR (dB)
25C 85C -40C
Dropout Voltage (mV)
600
500
-55 -60 -65 -70 -75 -80 100
400
300
200
100
0 0 0.2 0.4 0.6 0.8 1 1.2
IOUT(A)
1000 10000 Frequency (Hz)
100000
AP7167
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics (Continued)
Line Transient Response
VIN =3V to 5.5V COUT =10uF (Ceramic) IOUT =200mA
Line Transient Response
VIN =5.5V to 3V COUT =10uF (Ceramic) IOUT =200mA
VIN 2V/div
VIN 2V/div
VOUT 50mV/div
VOUT 50mV/div
Time (5ms/div) Output Load Transient Response (VOUT=1.8V)
COUT=470uF (electrolytic)
Time (500us/div) Output Load Transient Response (VOUT=3.3V)
COUT=470uF (electrolytic)
VOUT 100mV/div
COUT=10uF (Ceramic)
VOUT 100mV/div
COUT=10uF (Ceramic)
COUT=1uF (Ceramic)
COUT=1uF (Ceramic)
1.2A IOUT 500mA/div 50mA IOUT 1A/us 500mA/div 50mA
1.2A 1A/us
Time (100us/div) Start-up Time (VOUT=1.2V, IOUT=0.1A)
Time (100us/div) Start-up Time (VOUT=1.2V, IOUT=1.2A)
VEN 2V/div
VEN 2V/div
COUT=10uF VOUT 1V/div VOUT 1V/div
COUT=10uF
VPOK 2V/div
VPOK 2V/div
Time (50us/div)
Time (50us/div)
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics (Continued)
Current Limit vs. Temperature
1.8
Current Limit (A)
1.7
1.6
1.5 VIN =2.8V,Vout=1.8V VIN =3.3V,Vout=1.8V 1.4 -50 -25 0 25 50 75 100
Temperature ( C)
o
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK Application Notes
Input Capacitor
A 1F ceramic capacitor is recommended to connect between IN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. A lower ESR (Equivalent Series Resistance) capacitor allows the use of less capacitance, while higher ESR type requires more capacitance. This input capacitor should be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both IN and GND. Rearranging the equation will give the following equation to find the approximate resistor divider values:
V R1 = R2 OUT - 1 V REF
To maintain the stability of the internal reference voltage, R2 needs to be kept smaller than 250k.
No Load Stability Output Capacitor
The output capacitor is required to stabilize and help the transient response of the LDO. The AP7167 is designed to have excellent transient response for most applications with a small amount of output capacitance. The AP7167 is stable for all available types and values of output capacitors 4.7F. The device is also stable with multiple capacitors in parallel, which can be of any type of value. Additional capacitance helps to reduce undershoot and overshoot during transient. This capacitor should be placed as close as possible to OUT and GND pins for optimum performance. Other than external resistor divider, no minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition.
ENABLE/SHUTDOWN Operation
The AP7167 is turned on by setting the EN pin high, and is turned off by pulling it low. If this feature is not used, the EN pin should be tied to IN pin to keep the regulator output on at all time. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH.
Adjustable Operation
The AP7167 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below.
VIN
IN OUT R1 FB R2 Enable EN GND
POWER-OK
The Power-Ok (POK) pin is an active high open-drain output. It can be connected to any 5.5V or lower rail through an external pull-up resistor. The recommended sink current of POK pin is up to 4mA, so the pull-up resistor for POK should be in the range of 10k to 1M. If output voltage monitoring is not needed, the POK pin can be left floating.
VOUT
CIN
100kOhm
AP7167 POK
COUT
Current Limit Protection
When output current at OUT pin is higher than current limit threshold, the current limit protection will be triggered and clamp the output current to approximately 1.6A (1.2A min) to prevent over-current and to protect the regulator from damage due to overheating.
Short Circuit Protection When OUT pin is short-circuited to GND or OUT pin voltage is less than 200mV, short circuit protection will be triggered and clamp the output current to approximately 750mA. This feature protects the regulator from overcurrent and damage due to overheating.
The output voltage is calculated by:
R VOUT = VREF 1 + 1 R 2
Where VREF=0.8V (the internal reference voltage)
AP7167
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Application Notes (Continued)
Low Quiescent Current
The AP7167, consuming only around 150A for all input range and output loading, provides great power saving in portable and low power applications.
Power Dissipation
The device power dissipation and proper sizing of the thermal plane that is connected to the thermal pad is critical to avoid thermal shutdown and ensuring reliable operation. Power dissipation of the device depends on input voltage and load conditions and can be calculated by:
Wide Output Range
The AP7167, with a wide output range of 0.8V to 5.0V, provides a versatile solution for many portable and low power applications.
PD = ( VIN - VOUT )xIOUT
The AP7167 is available in the DFN3030-10 and SOP-8LEP packages, both with exposed pad, which is the primary conduction path for heat to the printed circuit board (PCB). The pad can be connected to ground or be left floating; however, to ensure the device will not overheat, it should be attached to an appropriate amount of copper PCB area. However, the maximum power dissipation that can be handled by the device depends on the maximum junction to ambient thermal resistance, maximum ambient temperature, and maximum device junction temperature, which can be approximated by the equation below:
Thermal Shutdown Protection
Thermal protection disables the output when the junction temperature rises to approximately +155C, allowing the device to cool down. When the junction temperature reduces to approximately +130C the output circuitry is enabled again. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This cycling limits the heat dissipation of the regulator, protecting it from damage due to overheating.
PD (max@ TA ) =
( +150C - TA ) R JA
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK Ordering Information
AP7167 - XX G - X
Package FN : DFN3030-10 SP : SOP-8L-EP
Device AP7167-FNG-7 AP7167-SPG-13
Notes:
Green G : Green
Packing 7/13 : Tape & Reel
Package Code FN SP
Packaging (Note 6) DFN3030-10 SOP-8L-EP
7"/13" Tape and Reel Quantity 3000/Tape & Reel 2500/Tape & Reel Part Number Suffix -7 -13
6. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
Marking Information
(1) DFN3030-10
( Top View ) XX YWX
XX : Identification Code Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green
Package DFN3030-10 Identification Code B4
Part Number AP7167
(2) SOP-8L-EP
( Top View )
8 5
Logo Part No. AP7167 YY WW X X E
1 4
G : Green YY : Year : 08, 09,10~ WW : Week : 01~52; 52 represents 52 and 53 week X : Internal Code SOP-8L-EP
AP7167
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK Package Outline Dimensions (Continued)
(1) Package Type: DFN3030-10
TOP MARK
0.10 C 0.08 C 0.57/0.63 0/0.02
0.15
Seating Plane
Top View
10x-0.30 0.50Typ. 0.60
0.25 A
Side View
2.9/3.1 2.3/2.5
C
2X-
(Pin #1 ID)
1.80
2.9/3.1
1.5/1.7
R0 .30
0.25/0.55
2.60 Land Pattern Recommendation (Unit:mm)
2X-
0.25 B 0.375Typ.
0.50Typ.
0.20/0.30
0.10
CAB
Bottom View
(2) Package Type: SOP-8L-EP
Detail "A" Exposed pad
7~9
3.85/3.95
5.90/6.10
3.70/4.10
45 0.35max.
7~9 1 1.30/1.50 1.75max.
0.15/0.25 3.3Ref.
1
Bottom View
0/0.13
0.254
1.27typ 4.85/4.95 1
0.3/0.5
Gauge Plane Seating Plane
0.62/0.82
Detail "A"
8x-0.60
Exposed pad
6x-1.27 8x-1.55
Land Pattem Recommendation (Unit:mm)
Notes:
7. All dimensions are in millimeters. Angles are in degrees. 8. Coplanarity applies to the exposed heat sink slug as well as the terminals.
5.4
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2.4Ref.
0.15
0.15
B
A
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK Taping Orientation (Note 9)
For DFN3030-10
Notes:
9.The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
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