33997 데이터 시트보기 (PDF) - Freescale Semiconductor

부품명

상세내역

일치하는 목록

33997

Switching Power Supply with Linear Regulators

Freescale Semiconductor 

Freescale Semiconductor, Inc.

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Document order number: MC33997/D

Rev 3.0, 03/2003

Advance Information

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.

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.

Features

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

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

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

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

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

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

• Undervoltage Shutdown on the VDDL, VDDH Outputs 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

POWER SUPPLY

INTEGRATED CIRCUIT

DW SUFFIX

24-LEAD SOICW

CASE 751E

ORDERING INFORMATION

Device

Temperature

Range (TA)

Package

MC33997DW/R2 -40°C to 125°C

24 SOICW

33997 Simplified Application Diagram

This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

© Motorola, Inc. 2003

For More Information On This Product,

Go to: www.freescale.com

Share Link: