Datasheet > BD9B300MUV

BD9B300MUV

更新时间： 2023-09-03 20:25:22

品牌	Logo	应用领域
罗姆 - ROHM		开关转换器稳压器
页数	文件大小	规格书
33页	1070K
描述
BD9B300MUV是内置低导通电阻的功率MOSFET的同步整流降压型开关稳压器。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，具有高速瞬态响应性能。

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BD9B300MUV 数据手册

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BD9B300MUV

Pin Configuration

(TOP VIEW)

Figure 2. Pin Assignment

Pin Descriptions

Pin No.

Pin Name

PVIN

Function

Power supply terminals for the switching regulator.

These terminals supply power to the output stage of the switching regulator.

Connecting a 10µF ceramic capacitor is recommended.

1, 2

3, 4

PGND

AGND

Ground terminals for the output stage of the switching regulator.

Ground terminal for the control circuit.

An inverting input node for the error amplifier and main comparator.

See page 22 for how to calculate the resistance of the output voltage setting.

Terminal for setting switching frequency. Connecting this terminal to ground makes

switching to operate constant on-time corresponding to 2.0MHz. Connecting this

terminal to AVIN makes switching to operate constant on-time corresponding to

1.0MHz. This terminal needs to be terminated.

FREQ

Terminal for setting switching control mode. Connecting this terminal to AVIN forces

the device to operate in the fixed frequency PWM mode. Connecting this terminal to

ground enables the Deep-SLLM control and the mode is automatically switched

between the Deep-SLLM control and fixed frequency PWM mode.

MODE

Terminal for setting the soft start time. The rise time of the output voltage can be

specified by connecting a capacitor to this terminal. See page 23 for how to calculate

the capacitance.

Switch nodes. These terminals are connected to the source of the High-Side

MOSFET and drain of the Low-Side MOSFET. Connect a bootstrap capacitor of 0.1

µF between these terminals and BOOT terminal. In addition, connect an inductor of

0.47µH to 1µH (FREQ=L), 1μH to 1.5μH (FREQ=H) considering the direct current

superimposition characteristic.

10, 11, 12

Terminal for bootstrap. Connect a bootstrap capacitor of 0.1 µF between this terminal

and SW terminals. The voltage of this capacitor is the gate drive voltage of the

High-Side MOSFET.

BOOT

PGD

A “Power Good” terminal, an open drain output. Use of pull up resistor is needed. See

page 17 for how to specify the resistance. When the FB terminal voltage reaches

more than 80% of 0.8 V, the internal Nch MOSFET turns off and the output turns High.

Enable terminal. Turning this terminal signal Low (0.3V or lower) forces the device to

enter the shutdown mode. Turning this terminal signal High (2.0V or higher) enables

the device. This terminal must be terminated.

Terminal for supplying power to the control circuit of the switching regulator.

Connecting a 0.1µF ceramic capacitor is recommended.

AVIN

A backside heat dissipation exposed pad. Connecting to the internal PCB ground

plane by using multiple vias provides excellent heat dissipation characteristics.

E-Pad

www.rohm.com

TSZ22111 • 15 • 001

TSZ02201-0J2J0AJ00410-1-2

2/30

23.May.2014 Rev.001

123 4 5 6 7...33

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与BD9B300MUV相关器件

型号	品牌	获取价格	描述	数据表
BD9B301MUV-LB	ROHM	获取价格	本产品是面向工业设备市场的产品，保证可长期稳定供货。是适合这些用途的产品。BD9B301M
BD9B304QWZ	ROHM	获取价格	BD9B304QWZ是内置低导通电阻的功率MOSFET的同步整流降压型开关稳压器。最大可输
BD9B305QUZ	ROHM	获取价格	BD9B305QUZ是一款同步整流降压DC/DC转换器，内置低导通电阻功率MOSFET。可
BD9B306NF-Z (开发中)	ROHM	获取价格	BD9B306NF-Z is one of the BD9Bx06NF-Z series
BD9B307NF-Z	ROHM	获取价格	BD9B307NF-Z is one of the BD9Bx07NF-Z series of single synchronous buck DC/DC converter
BD9B333GWZ	ROHM	获取价格	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
BD9B400MUV	ROHM	获取价格	Integrated MOSFET Single Synchronous Buck DC/DC Converter
BD9B400MUV-E2	ROHM	获取价格	Integrated MOSFET Single Synchronous Buck DC/DC Converter
BD9B406NF-Z	ROHM	获取价格	BD9B406NF-Z is one of the BD9Bx06NF-Z series of single synchronous buck DC/DC converter
BD9B407NF-Z	ROHM	获取价格	BD9B407NF-Z is one of the BD9Bx07NF-Z series of single synchronous buck DC/DC converter

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