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33730

更新时间： 2022-12-26 14:42:14

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		开关
页数	文件大小	规格书
27页	873K
描述
SWITCHING POWER SUPPLY

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33730 数据手册

Document Number: MC33730

Rev. 5.0, 7/2009

Freescale Semiconductor

Advance Information

Switch Mode Power Supply with

Multiple Linear Regulators

33730

The 33730 is a multiple output power supply integrated circuit for

automotive applications. The integrated circuit (IC) incorporates a

switching regulator which operates over a wide input voltage range

from +4.5V to +26.5V.

SWITCHING POWER SUPPLY

The step-down switching regulator uses a fixed frequency PWM

voltage mode control. It has a 3.5A current limit (typical) and the slew-

rate is adjustable via a control pin to reduce switching noise. The

switching regulator has an adjustable frequency oscillator, which

allows the user to optimize its operation over a wide range of input

voltages and component values.

The linear regulators can be configured either as two normal mode

regulators (V_DD3, V_DDL) and one standby regulator (V_KAM), or as one

normal mode linear regulator (V_DDL) and two standby regulators (V_KAM

and V_DD3Standby). Two protected outputs [VREF (1, 2)] are used to

provide power to external sensors.

EK SUFFIX (PB-FREE)

98ARL10543D

32-LEAD SOICW-EP

Features

• Provides all regulated voltages for Freescale 32-bit

microcontroller family

• Adjustable frequency switching buck regulator with slew-rate

control

ORDERING INFORMATION

Temperature

Device

Package

Range (T )

• Power sequencing provided

MCZ33730EK/R2

-40°C to 125°C

32-SOICW-EP

• Programmable voltages V_DDL, V_DD3- 3% accuracy

• Programmable standby regulator V_KAM- 15% accuracy,

operating down to 4.5V at KA_VBAT pin

• V_DD3can be programmed as an optional second standby regulator with 15% accuracy

• Provides two 5.0V protected supplies for sensors

• Provides reverse battery protection FET gate drive

• Provides necessary MCU monitoring and fail-safe support

• Pb-free packaging designated by suffix code EK

33730

VBAT

BOOT

PFD

KA_VBAT

VIGN

VDDH

INV

VCOMP

5.0V

3.3V

VDD3_B

VDD3

IGN_ON

VREF1,2

5.0 V

MCU

(32 Bit)

VDDL_B

VDDL

1.5V

KA_1.0V

VKAM

5.0V

GND

HRT

RSTs

REGON

Figure 1. 33730 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...27

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