300 mA, Low Dropout
CMOS Linear Regulator
ADP1712/ADP1713/ADP1714
TYPICAL APPLICATION CIRCUITS
FEATURES
Maximum output current: 300 mA
Input voltage range: 2.5 V to 5.5 V
Light load efficient
ADP1712
V
= 5V
V
= 3.3V
2.2µF
IN
OUT
5
1
2
3
IN
OUT
2.2µF
GND
EN
I
GND = 75 μA with 100 μA load
10nF
Low shutdown current: <1 μA
4
SS
Very low dropout voltage: 170 mV @ 300 mA load
Initial accuracy: 1ꢀ
Figure 1. ADP1712 with Fixed Output Voltage and Soft-Start Capacitor, 3.3 V
Accuracy over line, load, and temperature: 2ꢀ
16 fixed output voltage options with soft start:
0.75 V to 3.3 V (ADP1712)
Adjustable output voltage option: 0.8 V to 5.0 V
(ADP1712 Adjustable)
ADP1712
ADJUSTABLE
V
5
= 0.8V(1 + R1/R2)
OUT
V
= 5.5V
IN
1
2
3
IN
OUT
ADJ
2.2µF
2.2µF
GND
EN
R1
R2
4
16 fixed output voltage options with reference bypass:
0.75 V to 3.3 V (ADP1713)
16 fixed output voltage options with tracking:
0.75 V to 3.3 V (ADP1714)
Low output noise: 40 μV rms
Figure 2. ADP1712 with Adjustable Output Voltage, 0.8 V to 5.0 V
ADP1713
V
= 0.75V
2.2µF
V
= 3V
OUT
IN
High PSRR: 72 dB @ 1 kHz
1
2
3
5
IN
OUT
2.2µF
Stable with small 2.2 μF ceramic output capacitor
Excellent load/line transient response
Current limit and thermal overload protection
Logic controlled enable
GND
EN
10nF
4
BYP
Figure 3. ADP1713 with Fixed Output Voltage and Bypass Capacitor, 0.75 V
5-lead TSOT package
ADP1714
APPLICATIONS
V
= 3V
V
V
(V)
OUT
IN
OUT
1
2
3
5
4
IN
OUT
TRK
Mobile phones
3
2
1
2.2µF
2.2µF
GND
EN
Digital camera and audio devices
Portable and battery-powered equipment
Post dc-dc regulation
0
0V TO 5V
1
2
3
4
5
V
(V)
TRK
Figure 4. ADP1714 with Output Voltage Tracking
GENERAL DESCRIPTION
The ADP1712/ADP1713/ADP1714, available in a tiny, 5-lead
TSOT package, are low dropout linear regulators that operate
from 2.5 V to 5.5 V and provide up to 300 mA of output current.
The low 170 mV dropout voltage at a 300 mA load improves
efficiency and allows operation over a wide input voltage range.
Using a novel scaling architecture, ground current is a very low
75 μA when driving a 100 μA load, making the ADP1712/
ADP1713/ADP1714 ideal for battery-operated portable equipment.
soft-start time. The ADP1713 allows a reference bypass capacitor
to be connected, which reduces output voltage noise and
improves power supply rejection. The ADP1714 includes a
tracking feature, which allows the output to follow an external
voltage rail or reference.
The ADP1712/ADP1713/ADP1714 are optimized for stable
operation with small 2.2 μF ceramic output capacitors, allowing
good transient performance while occupying minimal board
space. An enable pin controls the output voltage on all devices,
and an undervoltage lockout circuit disables the regulator if IN
drops below a minimum threshold. The parts also have short
circuit protection and thermal overload protection, which
prevent damage to the devices in adverse conditions.
The ADP1712/ADP1713/ADP1714 are available in 16 fixed
output voltage options. The ADP1712 is also available in an
adjustable version, which allows output voltages that range from
0.8 V to 5 V via an external divider. The ADP1712 fixed version
allows an external capacitor to be connected to program the
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2007–2009 Analog Devices, Inc. All rights reserved.
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