ADP2381 20 V, 6 A Synchronous Step-Down Regulator with Low-Side Driver

The ADP2381 is a current mode control, synchronous, step-down, dc-to-dc regulator. It integrates a 44 mΩ power MOSFET and a low-side driver to provide a high efficiency solution. The ADP2381 runs from an input voltage of 4.5 V to 20 V and can deliver 6 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 ADP2381 can be programmed from 250 kHz to 1.4 MHz or fixed at 290 kHz or 550 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 ADP2381 operates over the −40°C to +125°C junction temperature range and is available in a 16-lead TSSOP_EP package.

APPLICATIONS

Communication infrastructure
Networking and servers
Industrial and instrumentation
Healthcare and medical
Intermediate power rail conversion
DC-to-dc point of load application

Features and Benefits

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:
6 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

Power Management

Switching Regulators

Design Tools

Data Sheets

Document	note
ADP2381: 20 V, 6 A Synchronous Step-Down Regulator with Low-Side Driver Datasheet (Rev. 0)	PDF 836 kB

User Guides

Document	note
UG-504: Evaluation Board for the ADP2380 and ADP2381, 20 V, 4 A/6 A Synchronous Step-Down Regulators with Low-Side Driver	PDF 410 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADP2381AREZ Production	TSSOP W/ THERMAL PAD	OTH 96	-40 to 125C	0	0	Y
ADP2381AREZ-R7 Production	TSSOP W/ THERMAL PAD	REEL 1000	-40 to 125C	0	1.68	Y

Evaluation Boards

Part Number	Description	Price	RoHS
ADP2380-EVALZ	Evaluation Board	60	Y
ADP2381-EVALZ	Evaluation Board	-1	Y

ADP2381: 20 V, 6 A Synchronous Step-Down Regulator with Low-Side Driver Datasheet (Rev. 0) adp2381

ADP238x Inverting Buck-Boost Regulator Design Tool adp2381

ADP238x Buck Regulator Design Tool adp2381

UG-504: Evaluation Board for the ADP2380 and ADP2381, 20 V, 4 A/6 A Synchronous Step-Down Regulators with Low-Side Driver adp2381