20 V, 6 A, Synchronous, Step-Down

DC-to-DC Regulator

Data Sheet

ADP2387

Rev. C

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

©2016–2017 Analog Devices, Inc. All rights reserved.

Technical Support

www.analog.com

FEATURES

Input voltage range: 4.5 V to 20 V

Integrated MOSFET: 44 mΩ typical/11 mΩ typical

Reference voltage: 0.6 V ± 1%

Continuous output current: 6 A

Programmable current-limit threshold

Programmable switching frequency: 200 kHz to 1400 kHz

Precision enable and power good

External compensation

Internal soft start with external adjustable option

Startup into a precharged output

Supported by ADIsimPower design tool

APPLICATIONS

Communications infrastructure

Networking and servers

Industrial and instrumentation

Healthcare and medical

Intermediate power rail conversion

DC-to-dc point of load applications

TYPICAL APPLICATIONS CIRCUIT

ADP2387

BST

FB

COMP

PGOOD

GND

VREG

RT

ILIM

SS

L

SW

PGND

EN

PVIN

Figure 1.

GENERAL DESCRIPTION

The ADP2387 is a synchronous step-down, dc-to-dc regulator with

an integrated 44 mΩ, high-side power, metal oxide semiconductor

field effect transistor (MOSFET) and an 11 mΩ, synchronous

rectifier MOSFET to provide a high efficiency solution in a

compact 4 mm × 4 mm LFCSP. This device uses a peak current

mode, constant frequency pulse-width modulation (PWM)

control scheme for excellent stability and transient response.

The switching frequency of the ADP2387 can be programmed

between 200 kHz to 1400 kHz.

The ADP2387 requires minimal external components and operates

from an input voltage of 4.5 V to 20 V. The output voltage can

be adjusted from 0.6 V to 90% of the input voltage and delivers

up to 6 A of continuous current. Each IC draws less than 110 µA

current from the input source when it is disabled.

This regulator targets high performance applications that require

high efficiency and design flexibility. External compensation

and an adjustable soft start function provide design flexibility.

The power-good output and precision enable input provide

simple and reliable power sequencing. The programmable

current-limit function allows the inductor to be optimized by

output current.

Other key features include undervoltage lockout (UVLO),

overvoltage protection (OVP), overcurrent protection (OCP),

short-circuit protection (SCP), and thermal shutdown (TSD).

The ADP2387 operates over the −40°C to +125°C junction

temperature range and is available in a 24-lead, 4 mm × 4 mm

LFCSP.

100

50

55

60

65

70

75

80

85

90

95

0

1

2

3

4

5

6

OUTPUT CURRENT (A)