ADP2389 18 V, 12 A Step-Down Regulator with Programmable Current Limit

The ADP2389/ADP2390 are current mode control, synchronous step-down, dc-to-dc regulators. They integrate a 17 mΩ high-side power MOSFET and a 4.5 mΩ synchronous rectifier MOSFET to provide a high efficiency solution. The ADP2390 operates in pulse frequency modulation (PFM) mode to improve the system efficiency at light load. The ADP2389/ADP2390 run from an input voltage of 4.5 V to 18 V and can deliver up to 12 A of output current. The output voltage can be adjusted to 0.6 V and the switching frequency can be programmed between 200 kHz to 2200 kHz.

The ADP2389/ADP2390 target high performance applications that require high efficiency and design flexibility. External compensation and soft start provide design flexibility. The power-good output and precision enable input provide simple and reliable power sequencing. An enhanced transient response feature improves the load transient performance, which reduces the output capacitance. Programmable current limit allows the user to optimized the inductor design and provide a compact solution.

Other key features include undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

The ADP2389/ADP2390 operates over a .40‹C to +125°C junction temperature range and is available in 32-lead, 5 mm ~ 5 mm LFCSP package.

Applications

Communication infrastructure
Networking and servers
Industrial and instrumentation
Healthcare and medical
Intermediate power rail conversions
DC-to-DC point of load applications

Features and Benefits

Input voltage: 4.5 V to 18 V

Continuous output current: 12 A

Integrated MOSFETs: 17 mΩ high-side/4.5 mΩ low-side

0.6 V ± 0.5% reference voltage

Programmable switching frequency range:
200 kHz to 2200 kHz

Enhanced transient response

Programmable current limit with ±10% accuracy

Precision enable and power good

External compensation and soft start

Start up into a precharged output

Supported by the ADIsimPower design tool

Power Management

Switching Regulators

Design Tools

ADP2389/ADP2390 Buck Designer Tool .

Data Sheets

Document	note
ADP2389/ADP2390: 18 V, 12 A Step-Down Regulator with Programmable Current Limit Data Sheet (Rev. 0)	PDF 767.37 K

User Guides

Document	note
UG-863: Evaluating the ADP2389/ADP2390, 18 V, 12 A Step-Down Regulators with Programmable Current-Limit (Rev. 0)	PDF 326.24 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADP2389ACPZ-R7 Production	32 ld. LFCSP (5x5x.90mm w/dual EP)	REEL 1500	-40 to 125C	0	2.6	E

Evaluation Boards

Part Number	Description	Price	RoHS
ADP2389-EVALZ	Evaluation Board	50	Y
ADP2390-EVALZ	Evaluation Board	50	Y

ADP2389/ADP2390: 18 V, 12 A Step-Down Regulator with Programmable Current Limit Data Sheet (Rev. 0) adp2389

UG-863 ：集成可编程限流的 18 V 、 12 A 降压稳压器 (Rev. 0) adp2389

ADP2389/ADP2390 Buck Designer Tool adp2389

UG-863: Evaluating the ADP2389/ADP2390, 18 V, 12 A Step-Down Regulators with Programmable Current-Limit (Rev. 0) adp2389