20 V, 4 A Synchronous Step-Down

Regulator with Low-Side Driver

Data Sheet

ADP2380

Rev. 0

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FEATURES

Input voltage: 4.5 V to 20 V

Integrated 44 mΩ high-side MOSFET

0.6 V ± 1% reference voltage over temperature

Continuous output current: 4 A

Programmable switching frequency: 250 kHz to 1.4 MHz

Synchronizes to external clock: 250 kHz to 1.4 MHz

180° out-of-phase synchronization

Programmable UVLO

Power-good output

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 application

TYPICAL APPLICATIONS CIRCUIT

ADP2380

1

PVIN

PVIN

UVLO

PGOOD

RT

SYNC

EN/SS

COMP

BST

SW

SW

LD

VREG

PGND

GND

FB

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

L

FET

Figure 1.

100

50

55

60

65

70

75

80

85

90

95

0

1.0

2.0

3.5

2.5

1.5

0.5

3.0

4.0

OUTPUT CURRENT (A)

GENERAL DESCRIPTION

The ADP2380 is a current mode control, synchronous, step-down,

dc-to-dc regulator. It integrates a 44 mΩ high-side power MOSFET

and a low-side driver to provide a high efficiency solution. The

ADP2380 runs from an input voltage of 4.5 V to 20 V and can

deliver 4 A of output current. The output voltage can be adjusted

to 0.6 V to 90% of the input voltage. The switching frequency of

the ADP2380 can be programmed from 250 kHz to 1.4 MHz or

fixed at 290 kHz or 540 kHz. The synchronization function allows

the switching frequency to be synchronized to an external clock

to minimize system noise.

External compensation and an adjustable soft start provide

design flexibility. The power-good output provides simple and

reliable power sequencing. Additional features include

programmable undervoltage lockout (UVLO), overvoltage

protection (OVP), overcurrent protection (OCP), and thermal

shutdown (TSD).

The ADP2380 operates over the −40°C to +125°C junction

temperature range and is available in a 16-lead TSSOP_EP

package.