Design contains obsolete parts

BU90003GWZ-E2-EVK-101: 1.2V @ 1A, 2.3 ~ 5.5 Vin

Summary

This evaluation board has been developed specifically developed to evaluate the BU90003GWZ synchronous buck DC/DC converter with integrated 250mΩ high-side Pch and 220mΩ low-side Nch MOSFETs.

Features include an input voltage range of 2.3V to 5.5V, 1.2V output, and a switching frequency range of 3.6MHz to 4.4MHz. Multiple protection functions are also built in, including a soft start circuit that prevents inrush current during startup, UVLO (Under Voltage Lock Out), TSD (Thermal Shutdown), and OCP (Over Current Protection).

An EN pin allows for simple ON/OFF control to reduce standby current consumption, while a MODE pin enables selection between fixed PWM operation or automatic PFM/PWM switching to improve efficiency during light loads.

Specifications

Manufacturer	Rohm Semiconductor
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	BU90003GWZ-E2-EVK-101-ND
Eval Board Supplier	Rohm Semiconductor
Eval Board	Board not Stocked
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1.2 V
Current Out	1 A
Voltage In	2.3 ~ 5.5 V
Efficiency @ Conditions	>75%, 5V in, 1.2V @ 25 ~ 800 mA
Voltage Out Range	- Fixed
Features	Light Load Mode Over Current Protection PFM or PWM Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	3.6 ~ 4.4 MHz
Standby Current [Typical]	0 µA
Quiescent Current [Typical]	45 µA
Component Count + Extras	6 + 8
Internal Switch	Yes
Design Author	Rohm
Application / Target Market	Portable Devices USB Powered Devices
Standby Current [Maximum]	1 µA
Quiescent Current [Maximum]	65 µA
Main I.C. Base Part	BU90003
Date Created By Author	2015-12
Date Added To Library	2019-03