20 V, 6 A, Synchronous Step-Down

DC-to-DC Regulator

Data Sheet

ADP2386

Rev. A

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FEATURES

Input voltage: 4.5 V to 20 V

Integrated MOSFET: 44 mΩ/11 mΩ

Reference voltage: 0.6 V ± 1%

Continuous output current: 6 A

Programmable switching frequency: 200 kHz to 1.4 MHz

Synchronizes to external clock: 200 kHz to 1.4 MHz

180° out of phase clock synchronization

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

ADP2386

BST

FB

COMP

PGOOD

GND

VREG

RT

SYNC

SS

L

SW

PGND

EN

PVIN

Figure 1.

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55

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100

0

1

2

3

4

5

6

OUTPUT CURRENT (A)

GENERAL DESCRIPTION

The ADP2386 is a synchronous step-down, dc-to-dc regulator with

an integrated 44 mΩ, high-side power MOSFET and an 11 mΩ,

synchronous rectifier MOSFET to provide a high efficiency

solution in a compact 4 mm × 4 mm LFCSP package. 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 ADP2386

can be programmed from 200 kHz to 1.4 MHz. To minimize

system noise, the synchronization function allows the switching

frequency to be synchronized to an external clock.

The ADP2386 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.

Other key features include undervoltage lockout (UVLO),

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

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

The ADP2386 operates over the −40°C to +125°C junction

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

LFCSP package.