Rohm BD9P108MUF-TSB-001 User Manual

Primary Buck DC/DC Converter
Single 2.2 MHz Buck DC/DC Converter
For Automotive
BD9P108MUF-C Evaluation Board
BD9P108MUF-TSB-001 (3.5 to 40V Input, 1.0A)
Introduction
This user's guide will provide the necessary steps to operate the Evaluation Board of ROHM's BD9P108MUF-C Buck DC/DC
converter. This includes the external parts, operating procedures and application data.
Description
This Evaluation Board was developed for ROHM's single 2.2 MHz buck DC/DC converter BD9P108MUF-C.
C is a current mode synchronous buck DC/DC converter with integrated POWER MOSFETs.
power supply input range of 3.5 V to 40 V and generates a maximum output current of 1 A. BD9P108MUF-C generates an
output voltage range of 0.8 V to 8.5 V using external resistors.
Application
Automotive Powered Supplies
Consumer Powered Supplies
Recommended Operating Conditions
Parameter
Input Voltage
Output Voltage (Note1)
Output Current Range
Switching Frequency
Maximum Efficiency
Maximum Efficiency
(Note1) Although the minimum output voltage is configurable up to 0.8 V, it may be limited by the SW min ON pulse width. For
the same reason, although the maximum output voltage is configurable up to 8.5 V, it may be limited by the SW minimum OFF
pulse width.
© 2022 ROHM Co., Ltd.
Table 1. Recommended Operating Conditions
Min Typ
3.5 -
0.8 -
- -
- 2.2
- 85.8
- 91.4
User's Guide
The BD9P108MUF-C accepts a
Max Units
40 V Initial startup is 4.0 V or more
8.5 V
OCP_SEL = H : 1.0 A (Max)
1.0 A
OCP_SEL = L : 0.5 A (Max)
- MHz
- % VO = 3.3 V, Io = 0.5 A, Ta = 25 °C
- % VO = 5.0 V, Io = 0.7 A, Ta = 25 °C
BD9P108MUF-
Conditions
66UG051E Rev.001
Sep.2023