AP7333

AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Description
Features
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300mA 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 typical at 100Hz
Fast start-up time: 80µs
Stable with low ESR, 1µF ceramic output capacitor
Excellent Load/Line Transient Response
Low dropout: 300mV typical at 300mA
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 AP7333 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 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 AP7333 is available in SOT23 packages with different
pin-outs.
Applications
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XDSL Router
Wireless LAN Cards
Desktop and Notebook Computers
Battery Powered Equipments
Mouse, Keyboards
Typical Application Circuit
VOUT
VIN
IN
OUT
AP7333
1uF
GND
AP7333 Rev. 2
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1uF
NOVEMBER 2009
© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Ordering Information
AP7333 - XX XX G - 7
Output
Package
Green
Packing
10 : 1.0V
12 : 1.2V
15 : 1.5V
18 : 1.8V
20 : 2.0V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
SA : SOT23
SR : SOT23R
G : Green
7 : Tape & Reel
Device
Package Code
AP7333-XXSAG-7
AP7333-XXSRG-7
Notes:
SA
SR
Packaging
(Note 2)
SOT23
SOT23R
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
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
( Top View )
( Top View )
IN 1
GND 1
3 GND
3 IN
OUT 2
AP7333 Rev. 2
OUT 2
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© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Pin Descriptions
Pin Number
SOT23
SOT23R
Pin Name
IN
1
3
OUT
2
2
GND
3
1
Description
Voltage input pin. Bypass to ground through at least 1µF
capacitor
Voltage output pin. Bypass to ground through 1µF ceramic
capacitor
Ground
Functional Block Diagram
IN
OUT
G ate
D river
C urre nt Lim it
and T herm a l
S hutdow n
R
V REF
R
GND
AP7333 Rev. 2
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© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Absolute Maximum Ratings
Symbol
ESD HBM
ESD MM
VIN
TOP
TST
PD
TJ
Parameter
Human Body Model ESD Protection
Machine Model ESD Protection
Input Voltage
Continuous Load Current
Operating Junction Temperature Range
Storage Temperature Range
SOT23
Power Dissipation (Note 3)
SOT23R
Maximum Junction Temperature
Ratings
6
400
7
Internal Limited
-40 ~ 125
-65 ~150
600
540
150
Units
kV
V
V
°C
°C
mW
mW
°C
Recommended Operating Conditions
Symbol
VIN
IOUT
TA
Notes:
Parameter
Input voltage
Output Current (Note 4)
Operating Ambient Temperature
Min
2
0
-40
Max
6
300
85
Unit
V
mA
°C
3. Ratings apply to ambient temperature at 25°C
4. The device maintains a stable, regulated output voltage without a load current.
AP7333 Rev. 2
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© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Electrical Characteristics
o
(TA = 25 C, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, unless otherwise stated)
Symbol
Test Conditions
Min Typ. Max Unit
IOUT = 0mA
55
75
⎯
Input Quiescent Current
μA
IQ
IOUT = 300mA
65
85
IOUT = 300mA
300 550 mV
VDropout Dropout Voltage (Note 5)
TA = -40oC to 85oC,
-2
2
%
VOUT Output Voltage Accuracy
IOUT = 30mA
ΔVOUT
VIN = (VOUT +1V) to VIN-Max,
0.01 0.20 %/V
Line Regulation
IOUT = 1mA
/ΔVIN/V
VIN = (VOUT +1V) to VIN-Max,
ΔVOUT
Load Regulation
-0.6
0.6
%
IOUT from 1mA to 300mA
/VOUT
VIN = 0V to 2.0V, VOUT = 1V,
Start-up Time
80
μs
tST
IOUT = 300mA
VIN = [VOUT +1V]VDC + 0.5VppAC,
65
dB
PSRR PSRR
f = 100Hz, IOUT = 30mA
VIN = VIN-Min to VIN-Max,
100
mA
ISHORT Short-circuit Current
VOUT < 0.2V
Current Limit
VOUT/ROUT = 1A
400 600
mA
ILIMIT
Thermal
Shutdown
Threshold
140
TSHDN
°C
Thermal Shutdown Hysteresis
15
THYS
°C
o
SOT23 (Note 6)
207
C/W
Thermal Resistance Junction-to-Ambient
θJA
o
SOT23R (Note 6)
230
C/W
Notes:
Parameter
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.
AP7333 Rev. 2
5 of 12
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© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Typical Performance Characteristics
Quiescent Current vs Input Voltage
Iload=0mA
Line Regulation (% /V)
0.1
Output Voltage Variation (%/V)
Output Current (mA)
60
Vout=2.5V
58
90℃
56
54
52
25℃
50
-45℃
90℃
0.06
0.02
-0.02
48
3
3.3
3.6
3.9
4.2
4.5
4.8
5.1
5.4
5.7
6
-45℃
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Load Regulation (% )
Dropout Voltage
0.6
6
350
-45℃
0.2
0
-0.2
25℃
Vout=2.5V
Vin=Vout +1V
-0.4
Vout=2.5V
300
Dropout Voltage (mV)
0.4
90℃
250
200
150
25℃
100
-45℃
50
90℃
0
-0.6
0
50
100
150
200
250
0
300
50
100
150
200
250
300
Output Current (mA)
Output Current (mA)
Current Limit vs Input Voltage
Short Circuit vs Input Voltage
600
105
Vout=2.5V
100
-45℃
Current Limit (mA)
Output Current (mA)
25℃
-0.1
2.7
Output Voltage Variation (%)
Vout=2.5V
Vin=Vout +1V
-0.06
95
90
85
80
25℃
Ta=25℃
Vout=2.5V
550
500
450
90℃
400
75
3.5
4
4.5
5
5.5
6
Input Voltage (V)
AP7333 Rev. 2
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3.5
4
4.5
5
5.5
6
Input Voltage (V)
NOVEMBER 2009
© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Typical Performance Characteristics
(Continued)
PSRR
PSRR
75
75
70
70
Vout=1V
Vin=2V
Cin=Cout=1uF
Ta=25℃
60
Vout=2.5V
Vin=3.5V
Cin=Cout=1uF
Ta=25℃
65
PSRR (dB)
PSRR (dB)
65
55
50
60
55
50
45
45
40
40
35
35
0.1
1
10
100
0.1
1
10
100
Frequency (kHz)
Frequency (kHz)
Line Transient Response
Line Transient Response
Vin=3V to 2V (1V/div)
Vin=2V to 3V (1V/div)
Tr=10us
Tr=10us
Vout=1V (50mV/div)
Vout=1V (50mV/div)
Iout=300mA (300mA/div)
Iout=300mA (300mA/div)
Time (50us/div)
AP7333 Rev. 2
Time (50us/div)
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AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Typical Performance Characteristics
(Continued)
Load Transient Response
Load Transient Response
Tr=Tf=10us
Vin=3.5V
Tr=Tf=10us
Vin=2V
Vout=2.5V
(100mV/div)
Vout=1V
(100mV/div)
Iout=1mA to 300mA
(100mA/div)
Iout=1mA to 300mA
(100mA/div)
Time (200us/div)
Time (200us/div)
Start-Up Time (No Load)
Start-Up Time (300mA Load)
Vin=0 to 3.5V (1V/div)
Cin=Cout=1uF
Vin=0 to 3.5V (1V/div)
Cin=Cout=1uF
Vout=2.5V (1V/div)
Vout=2.5V (1V/div)
Iout (300mA/div)
Time (50us/div)
AP7333 Rev. 2
Time (50us/div)
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AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Application Note
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 copper 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 AP7333 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.
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 AP7333 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 circuitry into standby 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 AP7333’s fast transient response from 0 to 300mA
provides stable voltage supply for fast DSP and GSM chipset
with fast changing load.
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.
Small Overshoot and Undershoot
The AP7333 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 AP7333.
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 100mA. This feature
protects the regulator from over-current and damage due to
overheating.
The AP7333, consuming only around 65µA for all input range
and output loading, provides great power saving in portable
and low power applications.
Wide Output Options
Thermal Shutdown Protection
Thermal protection disables the output when the junction
temperature rises to approximately +140°C, allowing the device
AP7333 Rev. 2
Low Quiescent Current
The AP7333, with multiples of fixed output voltage options,
provides a versatile LDO solution for many portable
applications.
9 of 12
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© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Marking Information
(1) SOT23 and SOT23R
( Top View )
3
XX Y W X
1
AP7333 Rev. 2
2
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
Device
Package
Identification Code
AP7333-10SA
SOT23
JR
AP7333-12SA
SOT23
JS
AP7333-15SA
SOT23
JT
AP7333-18SA
SOT23
JU
AP7333-20SA
SOT23
JV
AP7333-25SA
SOT23
JW
AP7333-28SA
SOT23
JX
AP7333-30SA
SOT23
JY
AP7333-33SA
SOT23
JZ
AP7333-10SR
SOT23R
RA
AP7333-12SR
SOT23R
RB
AP7333-15SR
SOT23R
RC
AP7333-18SR
SOT23R
RD
AP7333-20SR
SOT23R
RE
AP7333-25SR
SOT23R
RF
AP7333-28SR
SOT23R
RG
AP7333-30SR
SOT23R
RH
AP7333-33SR
SOT23R
RJ
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AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
Package Information
(All Dimensions in mm)
(1) Package Type: SOT23 and SOT23R
AP7333 Rev. 2
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© Diodes Incorporated
AP7333
300mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
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AP7333 Rev. 2
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