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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Features
* * * * * * * * * * * * * * 300mA Low Dropout Regulator with EN Very low IQ: 40A Wide input voltage range: 2V - 6V Adjustable output: 1V - 5V High PSRR: 65dB at 1kHz Ultra-fast start-up time: 25s Stable with low ESR, 1F ceramic output capacitor Excellent Load/Line Transient Response Low dropout: 350mV at 300mA Current limit protection Short circuit protection Thermal shutdown protection Ambient temperature range: -40C to 85C SOT25 and DFN2020-6 (Preview): Available in "Green" Molding Compound (No Br, Sb)
Description
The AP133 is a 300mA, adjustable output voltage, low dropout linear regulator. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. The characteristics of low dropout voltage and less quiescent current make it good for low power applications, for example, battery powered devices. The typical quiescent current is approximately 40A from zero to maximum load. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP133 is available in SOT25 and DFN2020-6 (preview) package.
Applications
* * * * * Cellular Phones Smart Phones, PDAs MP3/MP4 Bluetooth head set Low power application
Ordering Information
AP133-XX X
Package W : SOT25 SN : DFN2020-6
Lead Free
Packing -7 : Taping
G : Green
Note:
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
AP133-W AP133-SN
Note:
Package Code
W SN
Packaging (Note 2)
SOT25 DFN2020-6
7" Tape and Reel Quantity Part Number Suffix
3000/Tape & Reel 3000/Tape & Reel -7 -7
2. 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.
AP133 Rev. 2
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(c) Diodes Incorporated
AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Pin Assignment
(Top View) IN 1 GND 2 EN 3 SOT25 4 ADJ 5 OUT
(Top View)
EN 1 GND 2 IN 3 6 ADJ 5 NC 4 OUT
DFN2020-6 (Preview)
Pin Descriptions
Name IN GND EN ADJ NC OUT
Pin Number SOT25 DFN2020-6 1 3 2 2 3 1 4 6 5 5 4
Description Voltage input pin. Bypass to ground through at least 0.1F capacitor Ground Enable input, active high Output feedback pin No connection Voltage output pin. Bypass to ground through 1F ceramic capacitor
Functional Block Diagram
IN
Current Limit and Thermal Shutdown
OUT
EN
Gate Driver
FB
0.8V
GND
AP133 Rev. 2
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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Typical Application Circuit
VIN
IN AP133 1uF Enable EN GND ADJ R2 OUT
VOUT
R1 1uF
R VOUT = VREF 1 + 1 R 2
Absolute Maximum Ratings
Symbol VIN TOP TST PD TJ
Note:
Parameter Input Voltage OUT, ADJ, EN Voltage Continuous Load Current Operating Junction Temperature Range Storage Temperature Range SOT25 Power Dissipation (Note 3) DFN2020-6 Maximum Junction Temperature
Ratings 7 VIN + 0.3 Internal Limited -40 ~ 125 -65 ~150 610 880 150
Units V V C C mW mW C
3. Ratings apply to ambient temperature at 25C.
Recommended Operating Conditions
Symbol Parameter Input voltage VIN Output Current IOUT Operating Ambient Temperature TA Min 2 0 -40 Max 6 300 85 Unit V mA C
AP133 Rev. 2
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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Electrical Characteristics
(TA = 25 C, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, VEN = 2V, unless otherwise stated)
o
Symbol IQ ISHDN ILEAK VDropout VREF IADJ VOUT VOUT /VOUT tST PSRR ISHORT ILIMIT VIL VIH IEN TSHDN THYS JA
Parameter Input Quiescent Current Input Shutdown Current Input Leakage Current Dropout Voltage ADJ reference voltage ADJ leakage Output Voltage Accuracy
Test Conditions IOUT = 0~300mA VEN = 0V, IOUT = 0 VEN = 0V, OUT grounded VOUT 1.5V, IOUT = 300mA IOUT= 0
Min Typ 40 350 0.8 -2 0.05 -1 25 65 120 600
Max Unit 60 A 1 A 1 A 450 mV V 1 A 2 % %/V 1 % s dB mA mA V V A C C
o
VOUT /VIN/V Line Regulation Load Regulation Start-up Time PSRR Short-circuit Current Current limit EN Input Logic Low Voltage EN Input Logic High Voltage EN Input leakage Thermal shutdown threshold Thermal shutdown hysteresis Thermal SOT25 Resistance Junction-toDFN2020-6 Ambient SOT25 Thermal Resistance DFN2020-6 Junction-to-Case
VIN = VOUT +1V to 5.5V, IOUT = 1mA IOUT from 1mA to 300mA VEN = 0V to 2.0V, IOUT = 300mA 1kHz, IOUT = 0mA VIN = 5.0V, VOUT < 0.2V VOUT = 3V, ROUT = 3
400 1.4 -1
0.4 VEN = 0V or 5.5V 1 145 20 197 Device mounted on FR-4 substrate, 1"x1" 1oz copper, single-sided PCB board 136 45 102
C/W
JC
o
C/W
AP133 Rev. 2
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(c) Diodes Incorporated
AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Typical Performance Characteristics
Output Voltage vs. Temperature
3.3100 VIN=5V, Vout=3.3V 1.8200
Output Voltage vs. Temperature
VIN=3.3V, Vout=1.8V
Output Voltage (V)
3.3050
Output Voltage (V)
-25.0 0.0 25.0 50.0 75.0 100.0 125.0
1.8150
3.3000
1.8100
3.2950
1.8050
3.2900 -50.0
1.8000 -50.0 -25.0 0.0 25.0 50.0 75.0 100.0 125.0
Temperature (C)
Temperature (C)
Output Voltage vs. Input Voltage
2.0 60
Quiescent Current vs. Input Voltage
VOUT=1.2V
IOUT=0mA 55 IOUT=300mA
1.8 1.6
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 IOUT=0mA IOUT=150mA
Quiescent Current (uA)
Output Voltage (V)
50
45
40
35
30 2.0 3.0 4.0 5.0 6.0
Input Voltage (V)
Input Voltage (V)
VOUT=2.8V
60.00
Quiescent Current vs. IOUT
50
Vin=3.3V Vin=5V
Quiescent Current vs. Temperature
Quiescent Current (uA)
55.00
Quiescent Current (uA)
50.00
45
45.00
40
40.00
35.00
35
VOUT=1.2V VIN=3.3V VOUT=3.3V VIN=5.0V
30.00 0.00 50.00 100.00 150.00 200.00 250.00 300.00
30 -50.0 -25.0 0.0 25.0 50.0 75.0 100.0 125.0
IOUT (mA)
Temperature (C)
AP133 Rev. 2
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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Typical Performance Characteristics
(Continued)
ADJ Pin Voltage vs. Input Voltage
0.8020 0.8015 0.8010 0.8005 0.8000 0.7995 0.7990 2.0 3.0 4.0 5.0 6.0
450
Dropout Voltage vs. IOUT
VOUT=3.3V
Dropout Voltage (mV)
ADJ Pin Voltage (V)
400 350 300 250 200 150 100 50 0 0.0 50.0 100.0 150.0 200.0 250.0 300.0
25C 90C -45C
Input Voltage (V)
IOUT (mA)
Current Limit Protection
800
Current Limit vs. Temperature
Vin=3.3V, Vout=1.2V
Current Limit (mA)
750 700 650 600 550 500 -50 -30
Vin=5.0V, Vout=3.3V
-10
10
30
50
70
90
Temperature (C)
Time (50us/div)
Short Circuit Protection
Short Circuit Protection
Time (1ms/div)
Time (2ms/div)
AP133 Rev. 1
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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Typical Performance Characteristics
Short Circuit Current vs. Input Voltage
(Continued)
Short Circuit Current vs. Temperature Short Circuit Current (mA)
150 Vin=3.3V, Vout=1.2V 140 130 120 110 100 90 80 -50 -30 -10 10 30 50 70 90 Vin=3.3V, Vout=1.8V Vin=5.0V, Vout=3.3V
150
Short Circuit Current (uA)
140 130 120 110 100 90 80 70 2.0 3.0 4.0 5.0 6.0
Input Voltage (V)
Temperature (C)
Thermal Shutdown Protection
-20.00 -30.00
PSRR
PSRR (dB)
-40.00 -50.00 -60.00 -70.00 -80.00 -90.00 100 1000 10000 100000
Frequency (Hz)
Time (20ms/div)
Line Transient Response
Line Transient Response
Time (20us/div)
Time (20us/div)
AP133 Rev. 2
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(c) Diodes Incorporated
AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Typical Performance Characteristics
Line Transient Response
(Continued) Line Transient Response
Time (20us/div)
Time (20us/div)
Load Transient Response
Load Transient Response
Time (100us/div)
Time (100us/div)
Load Transient Response
Load Transient Response
Time (20us/div)
Time (100us/div)
AP133 Rev. 2
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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Typical Performance Characteristics
(Continued)
Start-up Time
Start-up Time
Time (5us/div)
Time (5us/div)
Start-up Time
Start-up Time
Time (5us/div)
Time (5us/div)
AP133 Rev. 2
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(c) Diodes Incorporated
AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Application Note
Input Capacitor
A1F ceramic capacitor is recommended to connect between VIN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must 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 VIN and GND. A lower ESR capacitor allows the use of less capacitance, while higher ESR type require more capacitance.
ON/OFF Input Operation
The AP133 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.
Output Capacitor
The output capacitor is required to stabilize and help transient response for LDO. The AP133 is stable with very small ceramic output capacitors. The recommended capacitance is from 1F to 4.7F, Equivalent Series Resistance (ESR) is from 10m to 100m, and temperature characteristics is X7R or X5R. Higher capacitance values help to improve load/line transient response. The output capacitance may be increased to keep low undershoot/overshoot. Place output capacitor as close as possible to OUT and GND pins, and keep the leads as short as possible.
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 600mA to prevent over-current and to protect the regulator from damage due to overheating.
Short Circuit Protection
When OUT pin is short-circuit to GND or OUT pin voltage is less than 200mV, short circuit protection will be triggered and clamp the output current to approximately 120mA. This feature protects the regulator from over-current and damage due to overheating.
Adjustable Operation
The AP133 provides output voltage from 1.0V to 5.0V through external resistor divider as shown below.
V IN
IN C IN E nable EN GN D ADJ R2 AP 133 OUT COUT
Thermal Shutdown Protection
Thermal protection disables the output when the junction temperature rises to approximately +145C, allowing the device to cool down. When the junction temperature reduces to approximately +125C 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.
V OUT
R1
Ultra Fast Start-up
After enabled, the AP133 is able to provide full power in as little as tens of microseconds, typically 25s, without sacrificing low ground current. This feature will help load circuitry move in and out of standby mode in real time, eventually extend battery life for mobile phones and other portable devices.
The output voltage is calculated by:
R VOUT = VREF 1 + 1 R 2
Where VREF=0.8V (the internal reference voltage) Rearranging the equation will give the following that is used for adjusting the output to a particular voltage:
Fast Transient Response
Fast transient response LDOs can also extend battery life. TDMA-based cell phone protocols such as Global System for Mobile Communications (GSM) have a transmit/receive duty factor of only 12.5 percent, enabling power savings by putting much of the baseband circuitry into standby mode in between transmit cycles. In baseband circuits, the load often transitions virtually instantaneously from 100A to 100mA. To meet this load requirement, the LDO must react very quickly without a large voltage droop or overshoot -- a requirement that cannot be met with conventional, general-purpose LDOs. The AP133's fast transient response from 0 to 300mA provides stable voltage supply for fast DSP and GSM chipset with fast changing load.
V R1 = R2 OUT - 1 V REF
To maintain the stability of the internal reference voltage, R2 need to be kept smaller than 250k.
No Load Stability
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.
Small Overshoot and Undershoot
The AP133 has small and controlled overshoot and undershoot in load and line transitions. This helps to protect supplied circuit from damage and operation error caused by glitches. This feather also permits the usage of small value output decoupling capacitor with AP133.
AP133 Rev. 2
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(c) Diodes Incorporated
AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Low Quiescent Current
Cellular phone baseband internal digital circuits typically operate from 1.8V to 2.6V. When the Li+ battery voltage falls to 3.2-3.3V, most phones shut off, giving at least 500-600mV of headroom for the baseband digital LDO, so dropout is not critical. Output noise and the PSRR are not critical specs for the digital circuits. Nonetheless, this supply requires low quiescent current at light loads because this LDO stays on at all times. Figure below shows how the digital supply current of a representative GSM chipset core varies as a function of time.
In the standby mode, the microprocessor consumes only around 200A. Since the phone stays in standby for the longest percentage of time, using a 40A quiescent current LDO, instead of 140A, saves 100A and extends the standby time by 340A/240A, or 1.417 times. The baseband internal analog circuit is typically 2.4V-3.0V, and it requires 200-600mV dropout. This LDO is on all the time, so it requires low quiescent current as well. The cellular phone real-time clock LDO needs a very low quiescent current, since this LDO is on all the time even though the handset is powered off. The AP133, consuming only around 40A for all input range and output loading, provides great power saving in portable and low power applications.
Wide Output Range
The AP133, with a wide output range of 1.0V to 5.0V, provides a versatile LDO solution for many portable applications.
High PSRR
The RF circuit consists of receive and transmit sections, which typically require 2.6V-3.0V supply voltage. The RF circuits such as LNA (low-noise amplifier), up/down-converter, mixer, PLL, VCO, and IF stage, require low noise and high PSRR LDOs. The temperature-compensated crystal oscillator circuit requires very high PSRR at RF power amplifier burst frequency. For instance, minimum 65dB PSRR at 217Hz is recommended for the GSM handsets. In order to provide good audio quality, the audio power supply for hand-free, game, MP3, and multimedia applications in cellular phones, require low-noise and high PSRR at audio frequency range (20Hz-20kHz). The AP133, with PSRR of 70dB at 1kHz in best case, is suitable for some of these applications that require high PSRR.
AP133 Rev. 2
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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Marking Information
(1) SOT25
(Top View)
5
4
7
Y : Year: 0~9 M :Month A~L X: G : Green
XX Y M X
NB:AP133
1
2
3
(2) DFN2020-6 (Preview)
(Top View)
.
XX YM X
XX : NB : AP133 Y : Year 0~9 M : Month A~L X : Internal code A~Z: Green
AP133 Rev. 2
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AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Package Information
(1) Package Type: SOT25
(All Dimensions in mm)
(2) Package Type: DFN2020-6 (Preview)
0.57/0.63 0.43mon.
Marking
0.05 C 0.15max.
(Active area depth) Seating plane C
0.08 C 0/0.05 2x 0.15 C
1.95/2.075 1.45/1.65
A
B
1.95/2.075
0.76/0.96
. R0
1
2x-
0.15 C 0.65nom. Bottom View 0.2/0.3 Pin#1 ID 0.05 M C A B
AP133 Rev. 2
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0.30/0.40
MAY 2007
(c) Diodes Incorporated
AP133
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.
AP133 Rev. 2
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MAY 2007
(c) Diodes Incorporated

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