Datasheet > MC33998DW/R2

MC33998DW/R2

更新时间： 2024-01-26 04:57:35

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	622K
描述
Switching Power Supply with Linear Regulators

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数据手册

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MC33998DW/R2 数据手册

Document Number: MC33998

Rev. 2.0, 8/2006

Freescale Semiconductor

Technical Data

Switching Power Supply with

Linear Regulators

33998

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.

SWITCHING REGULATOR

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.

DW SUFFIX

EG SUFFIX (PB-FREE)

98ASB42344B

The 33998 provides proper power supply sequencing for

advanced microprocessor architectures such as the MPC5xx and

683xx microprocessor families.

24-PIN SOICW

ORDERING INFORMATION

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

Temperature

Package

Device

Range (T )

MC33998DW/R2

MCZ33998EG/R2

-40°C to 125°C

24 SOICW

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

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

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

• 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

• Pb-Free Packaging Designated by Suffix Code EG

33998

KA_VPWR

DDH

VSW

5.0 V

VPWR

VDDH

MCU

VREF1

VREF2

5.0 V

DRVL

FBL

DDL

2.6 V

KAM

VKAM

2.6 V

SNSEN

PWROK

VKAMOK

GND

Figure 1. 33998 Simplified Application Diagram

Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as

may be required, to permit improvements in the design of its products.

12 3 4 5 6 7...20

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与MC33998DW/R2相关器件

型号	品牌	获取价格	描述	数据表
MC33998DWR2	MOTOROLA	获取价格	7A SWITCHING REGULATOR, PDSO24, PLASTIC, SOIC-24
MC33998R2	FREESCALE	获取价格	Switching Power Supply with Linear Regulators
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

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