首页	公司简介	产品展台	开发生产	资料下载	技术支持	解决方案	展会消息
代理经销	集成电路	高频微波	消费电子	工控网络	安防报警	光纤光电	汽车电子
合作交流	留言本	友情连接	热卖产品	销售网络	招聘加盟	新品介绍	联系我们

Motorola : Semiconductors : Product Catalog : Analog : Power Management : Switching Regulator : MC33997

Page Contents

Features
Parametrics
Documentation
Orderable Parts

Other Info

MC33997 : 3.3/5.0V switching power supply

The 33997 is a multiple output, medium power integrated supply operating from a 5.5 to 26.5V (with 40V transient)input source. A 5.0 V output is provided by a sensorless current mode step-down switching supply. A 3.3V output is provided by a linear regulator using an external pass transistor. An additional 3.3 V output is provided for standby use along with two internally protected low RDS(on)LDMOS 5.0 V outputs for sensor use. Separate Enable inputs provide main and sensor supply output control with reset and power-on reset delay. The 33997 provides power supply sequencing for advanced microprocessor architectures such as the Motorola MPC5xx and 683xx microprocessor families.

MC33997 Features

Step-down switching regulator output V DDH =5.0 V @1400 mA utilizing sensorless current mode control with soft start

Linear regulator with external pass transistor V DDL =3.3 V

Low power standby linear regulator V KAM =3.3 V @10 mA

Two sensor supplies protected against short-to-battery and short-to-ground

Reset signals,Power-On Reset Delay

Enable pin for main supplies,EN pin

Enable pin for sensor supplies,SNSEN pin

Power sequencing for advanced microprocessor architectures

MC33997 Parametrics

Characteristics	Package	Operating Input Voltage	Output Voltage	Protection	Availability
Step-down switching pre-regulator, 5 voltage regulators (5V, 3.3V), 3.3V standby regulator, switched battery output power sequencing, resets	24 SOICW	5.5 to 26.5V (with 40V transient)	5V @ 1400mA, 2x5V @ 200mA, 3.3V@ 400mA typ, 3.3V @ 10mA	Undervoltage shutdown, Vddh current limit, Vkam current limit, Short circuit to GND, Short circuit to Vpwr	Samples Now

MC33997 Documentation

Brochure

ID	Name	Format	Size K	Rev #	Date Last Modified	Order Availability
APDPAK/D	Analog ICs Portfolio Package	html	0	0	1/31/2002
BR1567/D	Analog ICs Integrated Solutions Technology	pdf	5416	0	1/16/2002
BR1568/D	Analog ICs Integrated Solutions Packaging	pdf	1411	0	1/11/2002
BR1569/D	Analog ICs Integrated Solutions Applications	pdf	2363	0	1/11/2002

Fact Sheets

ID	Name	Format	Size K	Rev #	Date Last Modified	Order Availability
MC33997FS/D	Analog Products PC33997 Fact Sheet	pdf	503	0	1/16/2002

Selector Guide

ID	Name	Format	Size K	Rev #	Date Last Modified	Order Availability
SG1002/D	Analog SPS Sales Guide	pdf	869	0	6/27/2002

Orderable Parts Information

PartNumber	Package Info	Life Cycle Description (code)	Remarks	Budgetary Price QTY 1000+ ($US)	Order Availability
PC33997DW	24 SOICW	PRODUCT NEWLY INTRO'D/RAMP-UP(1)	-	$2.36	-