Datasheet > BD9B333GWZ

BD9B333GWZ

更新时间： 2023-09-03 20:33:04

品牌	Logo	应用领域
罗姆 - ROHM		转换器
页数	文件大小	规格书
43页	4301K
描述
BD9B333GWZ是内置低导通电阻的功率MOSFET的同步整流降压型DC/DC转换器。最大可输出3A的电流。采用轻负载时进行低功耗工作的独创恒定时间控制方式，适用于要降低待机功耗的设备。振荡频率高，适用于小型电感。是恒定时间控制DC/DC转换器，具有高速负载响应性能。BD9B333GWZ 采用小型CSP封装，可在大功率密度下减少贴装面积。

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BD9B333GWZ 数据手册

Datasheet

2.7V to 5.5V Input, 3.0A Integrated MOSFET

Single Synchronous Buck DC/DC Converter

BD9B333GWZ

General Description

Key Specifications

BD9B333GWZ is a synchronous buck DC/DC converter

with built-in low on-resistance power MOSFETs. This IC,

which is capable of providing current up to 3A, features

fast transient response by employing constant on-time

control system. It offers high oscillating frequency at low

inductance. With its original constant on-time control

method which operates low consumption at light load,

this product is ideal for equipment and devices that

demand minimal standby power consumption.

BD9B333GWZ achieves the high power density and offer

a small footprint on the PCB by employing small CSP

package.



Input Voltage Range:

Output Voltage Range:

Output Current:

Switching Frequency:

High-Side MOSFET ON Resistance: 23mΩ (Typ)

Low-Side MOSFET ON Resistance: 23mΩ (Typ)

2.7V to 5.5V

0.6 V to V_INx 0.8 V

3A (Max)

1.3MHz (Typ)

Standby Current:

0μA (Typ)

Package

W (Typ) x D (Typ) x H (Max)

1.98mm x 1.80mm x 0.40mm

UCSP35L1

Features



Single Synchronous Buck DC/DC Converter

Constant On-time Control Suitable to Deep-SLLM

Over Current Protection

Short Circuit Protection

Over Voltage Protection

Thermal Shutdown Protection

Under Voltage Lockout Protection

Adjustable Soft Start

Power Good Output

UCSP35L1 Package (Resin Coating)

UCSP35L1

Applications

 Step-down Power Supply for DSPs, FPGAs,

Microprocessors, etc.

 Laptop PCs/Tablet PCs/Servers

 LCD TVs

 Storage Devices (HDDs/SSDs)

 Printers, OA Equipment

 Distributed Power Supplies, Secondary Power

Supplies

Typical Application Circuit

V_IN

V_PGD

V_OUT

C_OUT

C_IN

PVIN

AVIN

PGD

BOOT

Enable

C_BST

BD9B333GWZ

MODE

R₁

R₂

C_FB

AGND

PGND

Figure 1. Application Circuit (MODE=L)

〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays

.www.rohm.com

TSZ02201-0F3F0AJ00120-1-2

16.Jun.2017 Rev.001

1/40

TSZ22111 • 14 • 001

12 3 4 5 6 7...43

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