Datasheet > RAA212832

RAA212832

更新时间： 2024-11-30 14:58:11

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
19页	3366K
描述
72V 0.5A Step-Down Regulator with Fixed 6V or 12V Output, with Two 5V and 3.3V LDO Outputs and Standby Feature

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RAA212832 数据手册

Datasheet

RAA212832

4.5V to 72V Input, 0.5A Buck Regulator with 2 Linear Regulator Outputs

The RAA212832 is a triple output regulator combining

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

Features

▪ Buck Converter:

outputs. The buck regulator has a fixed switching

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 is

fixed at either 6V or 12V, which is controlled by the

STBY pin. 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 provides a compact, highly

integrated power management solution. Its integrated

buck regulator and LDO outputs minimize system

component count.

• 4.5V to 72V input voltage

• Fixed output voltage 12V or 6V

• 500mA output load capability

• 0.6Ω high-side MOSEFT r

DS(ON)

• Fixed switching frequency 350kHz in CCM

operation

• Pulse skipping mode in DCM operation

• Standby function by STBY pin setting output

voltage

• 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 RAA212832 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 RAA212832 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

VIN

CIN

GND

BST

CBST

VOUT

LDO_5V

LDO_3V3

C5V

COUT

VSTBY

STBY

C3V3

Figure 1. Typical Application Diagram

R16DS0192EU0102 Rev.1.02

Mar 13, 2023

Page 1

12 3 4 5 6 7...19

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