AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 1 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
• 150mA Low Dropout Regulator in 3-pin package
• Very low IQ over full load: 65µA
• Wide input voltage range: 2V to 6V
• Fixed output options: 1.0V to 3.3V
• PSRR: 65dB at 100Hz
• Fast start-up time: 80µs
• Stable with low ESR, 1µF ceramic output capacitor
• Excellent Load/Line Transient Response
• Low dropout: 150mV typical at 150mA
• Current limit protection
• Short circuit protection
• Thermal shutdown protection
• Ambient temperature range: -40ºC to 85°C
• SOT23 and SOT23R: Available in “Green” Molding
Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
The AP7313 is a 150mA, fixed output voltage, low dropout linear
regulator. The device included pass element, error amplifier,
band-gap, current limit and thermal shutdown circuitry.
The characteristics of low dropout voltage and low quiescent
current make it suitable for low power applications, for example,
battery powered devices. The typical quiescent current is
approximately 65μA.
Built-in current-limit and thermal-shutdown functions prevent IC
from damage in fault conditions.
The AP7313 is available in SOT23 package with different
pin-outs.
• Notebook and Desktop Computers and Pheripherals
• Portable Devices
• Battery Powered Devices
• CD-ROM, DVD and LAN Cards
Typical Application Circuit
1uF
IN
GND
OUT
1uF
VIN VOUT
AP7313
Features Description
Applications
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 2 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Ordering Information
AP7313 - XX XX G - 7
Packing
Package Green
SA : SOT23 G : Green 7 : Tape & Reel
SR : SOT23R
10 : 1.0V
Output
12 : 1.2V
15 : 1.5V
18 : 1.8V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
20 : 2.0V
Device Package Code Packaging
(Note 2) 7” Tape and Reel
Quantity Part Number Suffix
AP7313-XXSAG-7 SA SOT23 3000/Tape & Reel -7
AP7313-XXSRG-7 SR SOT23R 3000/Tape & Reel -7
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
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.
Pin Assignment
(1) SOT23 (1) SOT23R
GND
( Top View )
3
IN 1
OUT 2
IN
( Top View )
3
GND 1
OUT 2
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 3 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Pin Descriptions
Pin Name Pin Number Description
SOT23 SOT23R
IN 1 3
Voltage input pin. Bypass to ground through at least 1µF
capacitor
OUT 2 2
Voltage output pin. Bypass to ground through 1µF
ceramic capacitor
GND 3 1 Ground
Functional Block Diagram
IN
GND
OUT
Gate
Driver
VREF
Current Limit
and Thermal
Shutdown R
R
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 4 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Absolute Maximum Ratings
Symbol Parameter Ratings Units
ESD HBM Human Body Model ESD Protection 6 kV
ESD MM Machine Model ESD Protection 400 V
VIN Input Voltage 7 V
Continuous Load Current Internal Limited
TOP Operating Junction Temperature Range -40 ~ 125 °C
TST Storage Temperature Range -65 ~150 °C
PD Power Dissipation (Note 3) SOT23 600 mW
SOT23R 540 mW
TJ Maximum Junction Temperature 150 °C
Recommended Operating Conditions
Symbol Parameter Min Max Unit
VIN Input voltage 2 6 V
IOUT Output Current (Note 4) 0 150 mA
TA Operating Am bi ent T em p er ature -40 85 °C
Notes: 3. Ratings apply to ambient temperature at 25°C
4. The device maintains a stable, regulated output voltage without a load current.
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 5 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Electrical Characteristics
(TA = 25oC, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, unless otherwise stated)
Symbol Parameter Test Conditions Min Typ. Max Unit
IQ Input Quiescent Current IOUT = 0mA
⎯
55 75 μA
IOUT = 150mA 65 85
VDro
p
out Dropout Voltage (Note 5) IOUT = 150mA 150 300 mV
VOUT Output Voltage Accuracy TA = -40oC to 85oC,
IOUT = 30mA -2 2 %
ΔVOUT
/ΔVIN/V Line Regulation VIN = (VOUT +1V) to VIN-Max,
IOUT = 1mA 0.01 0.20 %/V
ΔVOUT
/VOUT Load Regulation VIN = (VOUT +1V) to VIN-Max,
IOUT from 1mA to 150mA -0.6 0.6 %
tST Start-up Time VEN = 0V to 2.0V, VOUT = 1.8V
IOUT = 150mA 80 μs
PSRR PSRR VIN = [VOUT +1V]VDC + 0.5VppAC,
f = 100Hz, IOUT = 30mA 65 dB
ISHORT Short-circuit Current VIN = VIN-Min to VIN-Max,
VOUT < 0.2V 50 mA
ILIMIT Current limit VIN = (VOUT +1V) to VIN-Max,
VOUT/ROUT = 0.5A 200 300 mA
TSHDN Thermal shutdown threshold 140 °C
THYS Thermal shutdown hysteresis 15 °C
θJA Thermal Resistance Junction-to-Ambient SOT23 (Note 6) 207 oC/W
SOT23R (Note 6) 230 oC/W
Notes: 5. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.
This parameter only applies to output voltages above 1.8V.
6. Test conditions for SOT23 and SOT23R: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, single
sided.
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 6 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics
Q ui escent Curr e nt v s I nput Vol t age
Iload=150mA
40
44
48
52
56
60
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input V ol tage (V )
Qui escent Current (uA)
Q ui escent Curr ent vs I nput Voltage
Iload=0mA
40
44
48
52
56
60
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input Voltage (V)
Quiescent Current (uA)
Line Re gul ation (%/V )
0
0.01
0.02
0.03
0.04
0.05
0.06
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input Vol t age (V )
O utput Voltage Var iation (%)
Loa d Re gulation (%)
-0.4
0
0.4
0.8
1.2
1.6
2
2.4
0 30 60 90 120 150
Output Current (m A )
O utput Voltage Variat ion ( %)
Dropout Voltage
0
40
80
120
160
200
0 25 50 75 100 125 150
Out put Current (m A )
Dropout V ol tage (mV)
Short Cir c ui t vs I nput Vol tage
35
40
45
50
55
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input V oltage (V )
Out put Current (mA)
90℃
-45℃
25℃
90℃
25℃
-45℃
90℃
25℃
-45℃
25℃
-45℃
90℃
90℃
-45℃ 25℃
Vout=1.8V Vout=1.8V
Vout=1.8V
Vin=Vout +1V Vout=1.8V
Vin=Vout +1V
Vout=2.5V
90℃
-45℃
25℃
Vout=1.8V
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 7 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Current Li mit vs I nput Vol t age
290
295
300
305
310
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input V ol tage (V )
Current Li m i t (m A)
PSRR
35
40
45
50
55
60
65
70
75
80
0.1 1 10 100
Frequency (kHz)
PS RR ( d B
)
PSRR
35
40
45
50
55
60
65
70
75
80
0.1 1 10 100
Frequency (kHz )
PSRR (dB)
PSRR
35
40
45
50
55
60
65
70
75
80
0.1 1 10 100
Frequency (kHz )
PSRR (dB)
Vout=1.8V
Ta=25℃
Vout=2.5V
Vin=3.5V
Cin=Cout=1uF
Ta=25℃
Vout=3.3V
Vin=4.3V
Cin=Cout=1uF
Ta=25℃
Vout=1.8V
Vin=2.8V
Cin=Cout=1uF
Ta=25℃
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 8 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Line Transient Response
Time (50us/div)
Line Transient Response
Time (50us/div)
Load Transient Response
Time (50us/div)
Load Transient Response
Time (50us/div)
Vout=3.3V (100mV/div)
Vout=3.3V (100mV/div)
Vin=5.3V to 4.3V (1V/div)
Tf=15us
Vin=4.3V to 5.3V (1V/div)
Tr=15us
Iout=150mA (150mA/div) Iout=150mA (150mA/div)
Vout=2.5V
(100mV/div) Vout=3.3V
(100mV/div)
Iout=1mA to 150mA
(50mA/div)
Tr=Tf=15us
Vin=4.3V
Tr=Tf=15us
Vin=3.5V
Iout=1mA to 150mA
(50mA/div)
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 9 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Start-Up Time (No Load)
Time (50us/div)
Start-Up Time (150mA Load)
Time (50us/div)
Application Note
Vin=0 to 4.3V (1V/div)
Cin =Cout= 1uF
Vout=3.3V (1.5V/div)
Iout=150mA (150mA/div)
Vin=0 to 4.3V (1V/div)
Cin =Cout=1uF
Vout=3.3V (1.5V/div)
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 10 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Input Capacitor
A 1μF 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 copp er trace is required for both VIN and
GND. A lower ESR capacitor allows the use of less
capacitance, while higher ESR type requires more
capacitance.
Output Capacitor
The output capacitor is required to stabilize and help transient
response for LDO. The AP7313 is stable with very small
ceramic output capacitors. The recommended capacitance is
from 1μF to 4.7μF, Equivalent Series Resistance (ESR) is from
10mΩ to 200mΩ, and temperature charact eristic is X7 R 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.
No Load Stability
No minimum load is required to keep the device stable. The
device will remain stable and regulated in no load condition.
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 300mA 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 50mA. This feature
protects the regulator from over-current and damage due to
overheating.
Thermal Shutdown Protection
Thermal protection disables the output when the junction
temperature rises to app roximately +140° C, allowing the dev ice
to cool down. When the junction temperature reduces to
approximately +125°C 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.
Ultra Fast Start-up
After turned on, the AP7313 is able to provide full power in as
little as tens of microseconds, typically 80µs, 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.
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 circui try into standb y mode in between
transmit cycles. In baseband circuits, the load often transitions
virtually instantaneously from 100µA to 100mA. To meet this
load requirement, the LDO must react very quickly without a
large voltage drop or overshoot — a requirement that cannot
be met with conventional, general-purpose LDOs.
The AP7313’s fast transient response from 0 to 150mA
provides stable voltage supply for fast DSP and GSM chipset
with fast changing load.
Small Overshoot and Undershoot
The AP7313 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 feature also permits the usage of small value
output decoupling capacitor with AP7313.
Lo w Quiescent Cu rren t
The AP7313, consuming only around 65µA for all input range
and output loading, provides great power saving in portable
and low power applications.
Wide Output Options
The AP7313, with multiples of fixed output voltage options,
provides a versatile LDO solution for many portable
applications.
Marking Information
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 11 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
(1) SOT23 and SOT23R
1 2
3
XX Y W
X
( Top View )
XX : Identification code
W : Week : A~Z : 1~26 week;
X : A~Z : Green
Y : Year 0~9
a~z : 27~52 week; z represents
52 and 53 week
Device Package Identification Code
AP7313-10SA SOT23 NR
AP7313-12SA SOT23 NS
AP7313-15SA SOT23 NT
AP7313-18SA SOT23 NU
AP7313-20SA SOT23 NV
AP7313-25SA SOT23 NW
AP7313-28SA SOT23 NX
AP7313-30SA SOT23 NY
AP7313-33SA SOT23 NZ
AP7313-10SR SOT23R SA
AP7313-12SR SOT23R SB
AP7313-15SR SOT23R SC
AP7313-18SR SOT23R SD
AP7313-20SR SOT23R SE
AP7313-25SR SOT23R SF
AP7313-28SR SOT23R SG
AP7313-30SR SOT23R SH
AP7313-33SR SOT23R SJ
Package Information (All Dimensions in mm)
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 Rev. 2 13 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any
liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated
convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products
described herein 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 Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized
sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized
application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems
without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2009, Diodes Incorpor ate d
www.diodes.com
