AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Features
• 150mA Low Dropout Regulator in 3-pin package
• Very low I
• 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)
over full load: 65µA
Q
Applications
• Notebook and Desktop Computers and Pheripherals
• Portable Devices
• Battery Powered Devices
• CD-ROM, DVD and LAN Cards
Typical Application Circuit
Description
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.
V
IN
IN
OUT
V
OUT
AP7313
1uF
1uF
GND
AP7313 Rev. 2 1 of 13 NOVEMBER 2009
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Ordering Information
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7313 - XX XX G - 7
Output
10 : 1.0V
12 : 1.2V
Package Green
SA : SOT23
G : Green
SR : SOT23R
Packing
7 : Tape & Reel
15 : 1.5V
18 : 1.8V
20 : 2.0V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
Device Package Code
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/datasheets/ap02001.pdf.
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
Packaging
(Note 2)
7” Tape and Reel
Quantity Part Number Suffix
Pin Assignment
(1) SOT23 (1) SOT23R
( Top View )
1
2
3
IN
IN
OUT
( Top View )
1
2
3
GND
GND
OUT
AP7313 Rev. 2 2 of 13 NOVEMBER 2009
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150mA, Low Quiescent Current, Fast Transient
Pin Descriptions
Pin Name
IN 1 3
OUT 2 2
GND 3 1 Ground
Functional Block Diagram
Pin Number
SOT23 SOT23R
Voltage input pin. Bypass to ground throug h at least 1µF
capacitor
Voltage output pin. Bypass to ground through 1µF
ceramic capacitor
AP7313
Low Dropout Linear Regulator
Description
IN
Gate
Driver
Current Lim it
and Thermal
Shutdown
V
REF
OUT
R
R
GND
AP7313 Rev. 2 3 of 13 NOVEMBER 2009
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AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
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
V
IN
I
OUT
T
A
Notes: 3. Ratings apply to ambient temperature at 25°C
4. The device maintains a stable, regulated output vo ltage without a load current.
Input voltage 2 6 V
Output Current (Note 4) 0 150 mA
Operating Ambi e nt Temperature -40 85
°C
AP7313 Rev. 2 4 of 13 NOVEMBER 2009
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⎯
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Electrical Characteristics
(TA = 25oC, V
Symbol Parameter Test Conditions Min Typ. Max Unit
I
V
Dropout
V
OUT
ΔV
/ΔV
ΔV
/V
tST
PSRR
I
SHORT
I
LIMIT
T
SHDN
T
HYS
θ
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.
= V
+1V, C
IN
OUT
Input Quiescent Current
Q
Dropout Voltage (Note 5) I
Output Voltage Accuracy
OUT
Line Regulation
/V
IN
OUT
Load Regulation
OUT
Start-up Time
PSRR
Short-circuit Current
Current limit
= 1uF, C
IN
= 1uF, unless otherwise stated)
OUT
= 0mA
I
OUT
I
= 150mA 65 85
OUT
= 150mA 150 300 mV
OUT
T
= -40oC to 85oC,
A
I
= 30mA
OUT
= (V
V
IN
= 1mA
I
OUT
V
= (V
IN
I
from 1mA to 150mA
OUT
V
EN
= 150mA
I
OUT
V
= [V
IN
f = 100Hz, I
V
= V
IN
V
OUT
V
= (V
IN
V
OUT/ROUT
+1V) to V
OUT
+1V) to V
OUT
= 0V to 2.0V, V
+1V]VDC + 0.5V
OUT
= 30mA
OUT
to V
IN-Min
< 0.2V
+1V) to V
OUT
= 0.5A
IN-Max
IN-Max
IN-Max
OUT
,
IN-Max
,
,
= 1.8V
ppAC
,
-2 2 %
-0.6 0.6 %
,
200 300 mA
Thermal shutdown threshold 140
Thermal shutdown hysteresis 15
Thermal Resistance Junction-to-Ambient
JA
SOT23 (Note 6) 207
SOT23R (Note 6) 230 oC/W
55 75
μA
0.01 0.20 %/V
80 μs
65 dB
50 mA
°C
°C
o
C/W
AP7313 Rev. 2 5 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
150mA, Low Quiescent Current, Fast Transient
Typical Performance Characteristics
AP7313
Low Dropout Linear Regulator
Quiescent Curr e nt v s I nput Vol t age
Iload=150mA
60
56
52
48
Vout=1.8V
90℃
-45℃ 25℃
44
Quies cent Current (uA)
40
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input Voltage (V)
Quiescent Current (uA)
Quiescent Curr ent vs I nput Voltage
Iload=0mA
60
Vout=1.8V
56
52
48
44
40
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
90℃
25℃
Input Voltage (V)
-45℃
Line Re gulation (%/V )
0.06
Vout=1.8V
0.05
0.04
0.03
0.02
0.01
in=Vout +1V
V
-45℃
90℃
25℃
Out put Voltage Variation ( %)
0
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input Vol t ag e (V)
2.4
Vout=1.8V
2
V
1.6
1.2
0.8
0.4
0
Output Voltage V a r iation (%)
-0.4
0 30 60 90 120 150
Load Regul ation (%)
in=Vout +1V
Outp ut Curren t (mA)
-45℃
90℃
25℃
Dropout Voltage
200
Vout=2.5V
160
120
80
40
Dropout Vol t age (m V )
0
0 25 50 75 100 125 150
Output Current (m A)
90℃
25℃
-45℃
55
50
45
40
Output Current (mA)
35
Short Ci r c ui t vs Input Volt a ge
Vout=1.8V
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
25℃
Input Volt age (V)
-45℃
90℃
AP7313 Rev. 2 6 of 13 NOVEMBER 2009
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)
150mA, Low Quiescent Current, Fast Transient
Typical Performance Characteristics (Continued)
AP7313
Low Dropout Linear Regulator
Current Lim i t vs I nput Vol t age
310
Vout=1.8V
a=25℃
305
300
Current Lim i t (mA )
295
290
2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 6
Input Volt age (V )
T
80
75
70
65
60
55
50
PSRR (d B
45
40
35
0.1 1 10 100
PSRR
Vout=1.8V
Vin=2.8V
Cin=Cout=1uF
Ta=25℃
Frequency (kHz)
PSRR
80
75
70
65
60
55
50
PSRR (dB)
45
40
35
0.1 1 10 100
Frequenc y (kHz)
Vout=2.5V
Vin=3.5V
Cin=Cout=1uF
Ta=25℃
80
75
70
65
60
55
50
PSRR (dB)
45
40
35
0.1 1 10 100
PSRR
Vout=3.3V
Vin=4.3V
Cin=Cout=1uF
Ta=25℃
Frequenc y (kHz )
AP7313 Rev. 2 7 of 13 NOVEMBER 2009
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150mA, Low Quiescent Current, Fast Transient
Typical Performance Characteristics (Continued)
Line Transient Response
Line Transient Response
AP7313
Low Dropout Linear Regulator
Tr=Tf=15us
Vin=3.5V
Vin=4.3V to 5.3V (1V/div)
Tr=15us
Vout=3.3V (100mV/div)
Iout=150mA (150mA/div)
Time (50us/div)
Load Transient Response
Vout=2.5V
(100mV/div)
Tr=Tf=15us
Vin=4.3V
Vin=5.3V to 4.3V (1V/div)
Tf=15us
Vout=3.3V (100mV/div)
Iout=150mA (150mA/div)
Time (50us/div)
Load Transient Response
Vout=3.3V
(100mV/div)
Iout=1mA to 150mA
(50mA/div)
Time (50us/div)
Iout=1mA to 150mA
(50mA/div)
Time (50us/div)
AP7313 Rev. 2 8 of 13 NOVEMBER 2009
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150mA, Low Quiescent Current, Fast Transient
Typical Performance Characteristics (Continued)
Start-Up Time (No Load)
Start-Up Time (150mA Load)
AP7313
Low Dropout Linear Regulator
Vin=0 to 4.3V (1V/div)
Cin =Cout=1uF
Vout=3.3V (1.5V/div)
Time (50us/div)
Time (50us/div)
Vin=0 to 4.3V (1V/div)
Cin =Cout=1uF
Vout=3.3V (1.5V/div)
Iout=150mA (150mA/div)
Application Note
AP7313 Rev. 2 9 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Input Capacitor
A 1μF ceramic capacitor is recommended to connect between
and GND pins to decouple input power supply glitch and
V
IN
noise. The amount of the capacitance may be increased
without limit. This i nput 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 V
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 characteristic 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.
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 approximately +140°C, allowing the dev ice
IN
and
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 baseba nd circuitr y into standby mod e 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.
Low Quiescent Current
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 Rev. 2 10 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
(1) SOT23 and SOT23R
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
( Top View )
XX
3
Y W
XX : Identification code
Y
: Year 0~9
W
X
: Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X
1 2
Device Package Identification Code
AP7313-10SA SOT23
AP7313-12SA SOT23
AP7313-15SA SOT23
AP7313-18SA SOT23
AP7313-20SA SOT23
AP7313-25SA SOT23
AP7313-28SA SOT23
AP7313-30SA SOT23
AP7313-33SA SOT23
AP7313-10SR
AP7313-12SR
AP7313-15SR
AP7313-18SR
AP7313-20SR
AP7313-25SR
AP7313-28SR
AP7313-30SR
AP7313-33SR
: A~Z : Green
SOT23R
SOT23R SB
SOT23R SC
SOT23R SD
SOT23R SE
SOT23R SF
SOT23R SG
SOT23R SH
SOT23R SJ
Package Information (All Dimensions in mm)
NR
NS
NT
NU
NV
NW
NX
NY
NZ
SA
AP7313 Rev. 2 11 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
150mA, Low Quiescent Current, Fast Transient
(1) Package Type: SOT23 and SOT23R
AP7313
Low Dropout Linear Regulator
AP7313 Rev. 2 12 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
AP7313
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
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AP7313 Rev. 2 13 of 13 NOVEMBER 2009
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