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33997

Freescale Semiconductor
Part Number 33997
Manufacturer Freescale Semiconductor
Description Switching Power Supply
Published Aug 8, 2007
Detailed Description www.DataSheet4U.com Freescale Semiconductor, Inc. Document order number: MC33997/D Rev 3.0, 03/2003 MOTOROLA SEMICOND...
Datasheet PDF File 33997 PDF File

33997
33997

Overview
www.
DataSheet4U.
com Freescale Semiconductor, Inc.
Document order number: MC33997/D Rev 3.
0, 03/2003 MOTOROLA SEMICONDUCTOR TECHNICAL DATA 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 Freescale Semiconductor, Inc.
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DW SUFFIX 24-LEAD SOICW CASE 751E ORDERING INFORMATION Device MC33997DW/R2 Temperature Range (TA) -40°C to 125°C Package 24 SOICW 33997 Simplified Application Diagram This document contains certain informatio...


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