MC33997

更新时间： 2024-10-01 22:54:59

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		稳压器开关
页数	文件大小	规格书
20页	456K
描述
Switching Power Supply with Linear Regulators

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数据手册

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MC33997 数据手册

Freescale Semiconductor, Inc.

MOTOROLA

Document order number: MC33997/D

Rev 3.0, 03/2003

SEMICONDUCTOR TECHNICAL DATA

Advance Information

33997

Switching Power Supply with Linear

Regulators

The 33997 is a medium-power, multi-output power supply integrated circuit

that is capable of operating over a wide input voltage range, from 6.0 V up to

26.5 V with 40 V transient capability. It incorporates a sensorless current

mode control step-down switching controller regulating directly to 5.0 V. The

3.3 V linear regulator uses an external pass transistor to reduce the 33997

power dissipation. The 33997 also provides a 3.3 V linear standby regulator

and two 5.0 V sensor supply outputs protected by internal low-resistance

LDMOS transistors.

POWER SUPPLY

INTEGRATED CIRCUIT

There are two separate enable pins for the main and sensor supply outputs

and standard supervisory functions such as resets with power-up reset delay.

The 33997 provides proper power supply sequencing for advanced

microprocessor architectures such as the Motorola MPC5xx and 683xx

microprocessor families.

DW SUFFIX

24-LEAD SOICW

CASE 751E

Features

• Operating Voltage Range 6.0 V up to 26.5 V (40 V transient)

• Step-Down Switching Regulator Output V_DDH= 5.0 V @ 1400 mA (total)

• Linear Regulator with External Pass Transistor V_DDL= 3.3 V @ 400 mA

• Low-Power Standby Linear Regulator V_KAM= 3.3 V @ 10 mA

ORDERING INFORMATION

Temperature

Device

MC33997DW/R2

Package

• Two 5.0 V @ 200 mA (typical) Sensor Supplies V_REFProtected Against

Range (T )

Short-to-Battery and Short-to-Ground with Retry Capability

-40°C to 125°C

24 SOICW

• Undervoltage Shutdown on the V_DDL, V_DDHOutputs with Retry Capability

• Reset Signals

• Power-Up Delay

• Enable Pins for Main Supplies (EN) and Sensor Supplies (SNSEN)

• Power Sequencing for Advanced Microprocessor Architectures

• SOIC-24WB Package

33997 Simplified Application Diagram

This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

For More Information On This Product,

Go to: www.freescale.com

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与MC33997相关器件

型号	品牌	获取价格	描述	数据表
MC33997DW	MOTOROLA	获取价格	Switching Power Supply with Linear Regulators
MC33997DW/R2	MOTOROLA	获取价格	Switching Power Supply with Linear Regulators
MC33997DWR2	FREESCALE	获取价格	Switching Power Supply with Linear Regulators
MC33998	FREESCALE	获取价格	Switching Power Supply with Linear Regulators
MC33998_06	FREESCALE	获取价格	Switching Power Supply with Linear Regulators
MC33998D	FREESCALE	获取价格	Switching Power Supply with Linear Regulators
MC33998DW	FREESCALE	获取价格	Switching Power Supply with Linear Regulators
MC33998DW	MOTOROLA	获取价格	7A SWITCHING REGULATOR, PDSO24, PLASTIC, SOIC-24
MC33998DW/R2	FREESCALE	获取价格	Switching Power Supply with Linear Regulators
MC33998DWR2	MOTOROLA	获取价格	7A SWITCHING REGULATOR, PDSO24, PLASTIC, SOIC-24