Datasheet > MC33998R2

MC33998R2

更新时间： 2024-02-20 00:39:04

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		稳压器开关
页数	文件大小	规格书
20页	441K
描述
Switching Power Supply with Linear Regulators

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数据手册

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MC33998R2 数据手册

Freescale Semiconductor, Inc.

MOTOROLA

Document order number: MC33998/D

Rev 1.0, 03/2003

SEMICONDUCTOR TECHNICAL DATA

Advance Information

33998

Switching Power Supply with Linear

Regulators

The 33998 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

2.6 V linear regulator uses an external pass transistor to reduce the 33998

power dissipation. The 33998 also provides a 2.6 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 33998 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= 2.6 V @ 400 mA

• Low-Power Standby Linear Regulator V_KAM= 2.6 V @ 10 mA

ORDERING INFORMATION

Temperature

Device

MC33998DW/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

33998 Simplified Application Diagram

33998

VDDH

KA_V

5.0 V

PWR SW

PWR

DDH

MCU

5.0 V

REF1

REF2

DRVL

FBL

VDDL

VKAM

2.6 V

KAM

SNSEN

GND

PWROK

VKAMOK

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

12 3 4 5 6 7...20

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与MC33998R2相关器件

型号	品牌	获取价格	描述	数据表
MC33999	MOTOROLA	获取价格	16-Output Switch with SPI and PWM Control
MC33999	FREESCALE	获取价格	16-Output Switch with SPI and PWM Control
MC33999EK	NXP	获取价格	1.2A SIPO BASED PRPHL DRVR, PDSO54, 0.65 MM PITCH, LEAD FREE, PLASTIC, SOIC-54
MC33999EK/R2	FREESCALE	获取价格	16-Output Switch with SPI and PWM Control
MC33999EKR2	NXP	获取价格	1.2A SIPO BASED PRPHL DRVR, PDSO54, 0.65 MM PITCH, LEAD FREE, PLASTIC, SOIC-54
MC3399DW	MOTOROLA	获取价格	AUTOMOTIVE HALF-AMP HIGH-SIDE SWITCH
MC3399DWR2	MOTOROLA	获取价格	Buffer/Inverter Based Peripheral Driver, 2.5A, BIMOS, PDSO16, PLASTIC, SOIC-16
MC3399T	MOTOROLA	获取价格	AUTOMOTIVE HALF-AMP HIGH-SIDE SWITCH
MC33AR6000AGWS	NXP	获取价格	Alternator Regulator, 14V 12A, LIN, LIN configurable, Wafer
MC33AR6000AXWS	NXP	获取价格	SPECIALTY ANALOG CIRCUIT

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