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AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
Features
* * * * * * * * * * * * Input Voltage Range is up 2.7 to 5.5V Dropout Voltage 400mV at 300mA Output Current Guaranteed 300mA Output Current Internal Ron = 1.5 PMOS draws no Base Current Low Quiescent Current 50A Output Voltage: 1.5V/1.8V/2.0V/2.5V/2.8V/3.0V/3.3V/ 3.5V; Accuracy 2% Active Low Shutdown Function (EN pin) Fast Transient Response Good Load Regulation Current Limit and Thermal Shutdown Protection Short Circuit Current Fold-Back Lead-Free and Green Package: SOT89-5L is available in Lead-Free only. SOT25 is available in both Lead-Free and Green (Note 1).
General Description
The AP131 is a 300mA, fixed output voltage, low dropout linear regulator. The Device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The device is ON when the EN pin is set to logic high level. The characteristics of low dropout voltage and less quiescent current make it good for some critical current applications, for example, some battery powered devices. The typical quiescent current is approximately 50A from zero to maximum load. Due to the internal flexible design, it results in extensively fixed output voltage versions and makes it convenient to use for applications. Built-in current-limit and thermal- shutdown functions prevent any fault condition from IC damage. An external capacitor can be connected to the BP pin and reduce the output noise.
Ordering Information
AP 131 - XX X X X
Output Voltage 15 18 20 25 28 30 33 35
Note:
Package Y : SOT89-5L W : SOT 25
Lead Free L : Lead Free Package G:Green (Note 2)
Packing -7/-13 : Taping
:1.5V :1.8V :2.0V :2.5V :2.8V :3.0V :3.3V :3.5V
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. 2. Green is only available for SOT 25.
Device
AP131-XXY AP131-XXW
Package Packaging Code (Note 3)
Y W SOT89-5L SOT25
7" Tape and Reel Part Quantity Number Suffix
NA 3000/Tape & Reel NA -7
13" Tape and Reel Part Quantity Number Suffix
2500/Tape & Reel NA -13 NA
Lead-free
Note:
3.
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.
AP131 Rev. 1
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(c) Diodes Incorporated
AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
Applications
* * * * Battery Powered Device Wireless Communication CD-ROM, DVD, and LAN Card PC Peripheral
Pin Description
Name IN GND EN BP OUT Description Input Voltage Ground Enable Pin Band-gap Output Voltage
Pin Assignment
(Top View) EN GND IN 1 2 3 4 OUT 5 BP IN GND EN (Top View) 1 2 3 4 SOT25 BP 5 OUT
SOT89-5L
Block Diagram
IN Error Amp
OUT
Current Limit EN Enable
-
+
Bandgap 1.08V Thermal Shutdown BP GND
AP131 Rev. 1
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(c) Diodes Incorporated
AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
Absolute Maximum Ratings
Symbol VCC TOP TST PD Parameter Input Voltage Operating Junction Temperature Range Storage Temperature Range Power Dissipation, PD @ TA = 25C SOT89-5L SOT25 Package Thermal Resistance SOT89-5L SOT25 Rating +6 -40 to +125 -65 to +150 500 250 +100 +250 Unit V C C mW mW C/W C/W
JA
Electrical Characteristics
TA = 25C, CIN = 1F, COUT = 10F, unless otherwise specified.
Symbol VDROP ILIMIT Ishort VLINE VLOAD VOUT
Parameter Dropout Voltage (Note 4) Current Limit (Note 5) Short Circuit Current Line Regulation Load Regulation (Note 6) Output Voltage Accuracy Output Voltage Temperature Coefficient (Note7) Ripple Rejection Standby Current Quiescent Current Enable Pin Current Enable Pin Voltage Enable Delay Time
Conditions IL = 300mA VIN = 5V, VOUT = 0V VOUT < 1.05V IOUT=1mA, VIN =( VOUT +1V ) to 5.5V IL = 1~300mA, VIN = 5V IL = 1mA, VIN = 5V
Min. 350 -2 -
Typ. 400 450 150 0.1 30 50 60 50 8
Max. 500 300 0.3 35 +2 150 5 100 < 0.1 VIN 0.8 -
Unit mV mA mA %/V mV % PPM/ C dB A A A V V S
PSRR ISB IQ IEN VENON VENOFF TDELAY
F = 100Hz, CIN = 1F, CO = 10uF, IL = 100mA IL = 0mA, VIN = 5V, EN = 0V IL = 0mA, VIN = 5V, EN = 5V Output ON Output OFF CBP = 0.1F, COUT = 1F, IOUT = 30mA
1.5 0 -
Note: 4. Dropout voltage is defined as the input to output differential voltage. Dropout is measured at constant junction temperature by using pulsed ON time, and the criterion is VOUT inside target value 2%. This test is skipped at the condition of VIN<3V. 5. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time. 6. Regulation is measured at constant junction temperature by using pulsed testing with a low ON time. 7. Guaranteed by design.
AP131 Rev. 1
3 of 7 www.diodes.com
NOVEMBER 2006
(c) Diodes Incorporated
AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
Typical Characteristics
70 65 60 55 50 45 40 35 30 25 20 15 10 5 0
AP131 PSRR vs. Frequency
3.095 3.09 3.085 3.08 3.075 3.07 3.065 3.06 3.055 3.05 3.045 3.04 3.035 3.03 3.025 3.02
0
AP131 Vout vs. Load Current
PSRR (dB)
Vout
10
100
1K
10K
100K
1M
30
60
90 120 150 180 210 240 270 300 330
Frequency (Hz)
Load Current (uA)
55 50 45 40 35 30 25 20 15 10 5 0
AP131 GND Current vs. Input Voltage
0.3 0.25
AP131 Dropout vs. Load
GND Current (uA)
Dropout (V)
0.2 0.15 0.1 0.05 0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
0
50
100
150
200
250
300
350
Input Voltage (V)
Load (Io) (mA)
AP131 Rev. 1
4 of 7 www.diodes.com
NOVEMBER 2006
(c) Diodes Incorporated
AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
Typical Application Circuit
AP131
VIN CIN 1uF IN GND EN OUT BP CBP 0.1uF ON EN OFF VOUT COUT 10uF
Marking Information
(Top View)
(Top View)
5
4
7
5
XX : Identification code Y : Year 0~9 M : Month A~L X : Blank : Lead Free Package G : Green Package
4
XX Y M X 1 2 SOT 25 3
XX YM
7
XX : Identification code Y : Year: 0-9 M : Month: A~L
1
2
SOT89-5L
3
Part Number SOT25 SOT89-5 AP131-15W AP131-15Y AP131-18W AP131-18Y AP131-20W AP131-20Y AP131-25W AP131-25Y AP131-28W AP131-28Y AP131-30W AP131-30Y AP131-33W AP131-33Y AP131-35W AP131-35Y
Identification Code
DA DD DF DK DN DP DS DU
AP131 Rev. 1
5 of 7 www.diodes.com
NOVEMBER 2006
(c) Diodes Incorporated
AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
Package Information (unit: mm)
(1) Package Type: SOT89-5L
(2) Package Type: SOT25
AP131 Rev. 1
6 of 7 www.diodes.com
NOVEMBER 2006
(c) Diodes Incorporated
AP131
300mA LOW DROPOUT LINEAR REGULATOR WITH SHUTDOWN
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.
AP131 Rev. 1
7 of 7 www.diodes.com
NOVEMBER 2006
(c) Diodes Incorporated

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