300 mA, Low Dropout
CMOS Linear Regulator
ADP1712/ADP1713/ADP1714
FEATURES
Maximum output current: 300 mA
Input voltage range: 2.5 V to 5.5 V
Light load efficient
I
GND
= 75 μA with 100 μA load
Low shutdown current: <1 μA
Very low dropout voltage: 170 mV @ 300 mA load
Initial accuracy: ±1%
Accuracy over line, load, and temperature: ±2%
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)
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
High PSRR: 72 dB @ 1 kHz
Stable with small 2.2 μF ceramic output capacitor
Excellent load/line transient response
Current limit and thermal overload protection
Logic controlled enable
5-lead TSOT package
TYPICAL APPLICATION CIRCUITS
ADP1712
V
IN
= 5V
1
V
OUT
= 3.3V
IN
GND
EN
SS
4
06455-001
OUT
5
2.2µF
2
3
2.2µF
10nF
Figure 1. ADP1712 with Fixed Output Voltage and Soft-Start Capacitor, 3.3 V
ADJUSTABLE
V
IN
= 5.5V
1
ADP1712
V
OUT
= 0.8V(1 + R1/R2)
5
IN
GND
OUT
2.2µF
2
3
2.2µF
R1
EN
ADJ
4
06455-002
R2
Figure 2. ADP1712 with Adjustable Output Voltage, 0.8 V to 5.0 V
ADP1713
V
IN
= 3V
2.2µF
2
3
1
IN
GND
OUT
V
OUT
= 0.75V
5
2.2µF
BYP
4
06455-003
10nF
EN
Figure 3. ADP1713 with Fixed Output Voltage and Bypass Capacitor, 0.75 V
APPLICATIONS
Mobile phones
Digital camera and audio devices
Portable and battery-powered equipment
Post dc-dc regulation
ADP1714
V
IN
= 3V
1
V
OUT
IN
GND
EN
TRK
4
V
OUT
(V)
3
2
1
06455-004
OUT
5
2.2µF
2
3
2.2µF
0V TO 5V
0
1 2 3 4 5
V
TRK
(V)
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.
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
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.
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 registered trademarks are the 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.
ADP1712/ADP1713/ADP1714
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Typical Application Circuits............................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution .................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ...................................................................... 10
Soft-Start Function (ADP1712) ................................................ 10
Adjustable Output Voltage (ADP1712 Adjustable) ............... 11
Bypass Capacitor (ADP1713) ................................................... 11
Track Mode (ADP1714) ............................................................ 11
Enable Feature ............................................................................ 11
Undervoltage Lockout (UVLO) ............................................... 11
Application Information ................................................................ 12
Capacitor Selection .................................................................... 12
Current Limit and Thermal Overload Protection ................. 12
Thermal Considerations............................................................ 13
Printed Circuit Board Layout Considerations ....................... 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 15
REVISION HISTORY
6/09—Rev. 0 to Rev. A
Updated Outline Dimensions ....................................................... 15
Changes to Ordering Guide .......................................................... 15
1/07—Revision 0: Initial Version
Rev. A | Page 2 of 16
ADP1712/ADP1713/ADP1714
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
IN to GND
OUT to GND
EN to GND
SS/ADJ/BYP/TRK to GND
Storage Temperature Range
Operating Junction Temperature Range
Lead Temperature, Soldering (10 sec)
Soldering Conditions
Rating
–0.3 V to +6 V
–0.3 V to IN
–0.3 V to +6 V
–0.3 V to +6 V
–65°C to +150°C
–40°C to +125°C
300°C
JEDEC J-STD-020
THERMAL RESISTANCE
θ
JA
is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 3. Thermal Resistance
Package Type
5-Lead TSOT
θ
JA
170
Unit
°C/W
ESD CAUTION
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rev. A | Page 5 of 16
MCU
京公网安备 11010802033920号
EEWORLD
