Datasheet > RAA212831

RAA212831

更新时间： 2024-11-30 14:57:43

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
20页	3339K
描述
72V 0.5A Step-Down Regulator with Two 5V and 3.3V LDO Outputs

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RAA212831 数据手册

Datasheet

RAA212831

4.5V to 72V Input, 0.5A Buck Regulator with Two Linear Regulator Outputs

The RAA212831 is a triple output regulator combining

a 4.5V to 72V input, 0.5A buck regulator with two LDO

outputs. The buck regulator has a fixed switching

Features

▪ Buck Converter:

• 4.5V to 72V input voltage

• Adjustable output voltage from 1.25V to

frequency of 350kHz in Continuous Conduction mode

(CCM) and operates in pulse skipping mode at lighter

loads when it enters Discontinuous Conduction mode

(DCM). The two LDOs operate from a 12V (or lower)

input voltage. The LDOs are rated at 100mA and

50mA of output current. The buck regulator output

V ×Dmax

• 500mA output load capability

• 0.6Ω high-side MOSEFT r

DS(ON)

• Fixed switching frequency 350kHz in CCM

operation

can be set from 1.25V to V ×Dmax. The LDOs can

support an input voltage range of 6V to 12V and the

output voltages are fixed at 3.3V and 5V. The IC is

designed to provide a compact, highly integrated

power management solution. Its integrated buck

regulator and LDO outputs minimize system

component count.

• Pulse skipping mode in DCM operation

• 6V standby function by external components

• High-side OCP, UVP, UVLO, OTP fault

protection

▪ 5V LDO Regulator:

The buck converter uses peak current mode control,

providing 500mA current for load and downstream

LDO regulators, while the LDOs provide 5V and 3.3V

regulated outputs for the system. The current-mode

buck converter provides a fast transient response and

cycle-by-cycle switching current limit. All output

voltages are fixed internally with few external

components required.

• 6V to 12V input voltage

• Fixed output voltage 5V

• 100mA output load capability

• Current limit foldback function

▪ 3.3V LDO Regulator:

• 4.5V to 12V input voltage

• Fixed output voltage 3.3V

• 50mA output load capability

• Current limit foldback function

▪ SOIC8-E package

At light load or no-load operation on the buck

regulator output, the RAA212831 operates in a pulse

skipping mode in DCM. When the output load is

increased, and the buck regulator enters CCM, the

controller operates at 350kHz.

Applications

▪ Electric-bike power management

The RAA212831 offers comprehensive protection

including UVLO, high-side overcurrent, output

undervoltage, and over-temperature protection.

▪ Motor driver control board power supply

The device is available in SOIC8-E package.

VIN

LDO_VIN

CIN

GND

BST

CBST

VOUT

LDO_5V

LDO_3V3

C5V

RFB1

RFB2

COUT

C3V3

Figure 1. Typical Application Diagram

R16DS0191EU0102 Rev.1.02

Mar 2, 2023

Page 1

12 3 4 5 6 7...20

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与RAA212831相关器件

型号	品牌	获取价格	描述	数据表
RAA212832	RENESAS	获取价格	72V 0.5A Step-Down Regulator with Fixed 6V or 12V Output, with Two 5V and 3.3V LDO Outputs
RAA214020	RENESAS	获取价格	5.5V 2A Ultra Low Noise, High PSRR, LDO
RAA214023	RENESAS	获取价格	5.5V 2A Ultra Low Noise, High PSRR, LDO, pin to pin with TPS7A83 family
RAA214220	RENESAS	获取价格	20V, 150mA Linear Regulator
RAA214223	RENESAS	获取价格	150mA 20V Wide Input Voltage Range LDO Linear Regulator with 3.3V Fixed Output
RAA214250	RENESAS	获取价格	20V, 500mA Linear Regulator
RAA214401	RENESAS	获取价格	150mA Wide Input Range Ultra Low Quiescent Current Linear Regulator
RAA214403	RENESAS	获取价格	Low Iq Current LDO Regulator with Fixed 3.3V Output
RAA214404	RENESAS	获取价格	Low Iq Current LDO Regulator with Fixed 3.6V Output
RAA214405	RENESAS	获取价格	Low Iq Current LDO Regulator with Fixed 5V Output

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