mc33998 Freescale Semiconductor, Inc, mc33998 Datasheet

mc33998

Manufacturer Part Number

mc33998

Description

Switching Power Supply With Linear Regulators

Manufacturer

Freescale Semiconductor, Inc

Datasheet

1.MC33998.pdf (20 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

mc33998DW

Manufacturer:

FYEESCALE

Quantity:

20 000

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Freescale Semiconductor

Technical Data

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

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

Switching Power Supply with

Linear Regulators

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.

outputs and standard supervisory functions such as resets with

power-up reset delay.

advanced microprocessor architectures such as the MPC5xx and

683xx microprocessor families.

Features

The 33998 is a medium-power, multi-output power supply

There are two separate enable pins for the main and sensor supply

The 33998 provides proper power supply sequencing for

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

• Step-Down Switching Regulator Output V

• Linear Regulator with External Pass Transistor V

• Low-Power Standby Linear Regulator V

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

• Undervoltage Shutdown on the V

• 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

1400 mA (total)

400 mA

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

5.0 V

Figure 1. 33998 Simplified Application Diagram

DDL

, V

DDH

KAM

DDH

Outputs with Retry Capability

= 2.6 V @ 10 mA

KA_VPWR

VPWR

VREF1

VREF2

SNSEN

GND

= 5.0 V @

DDL

REF

33998

= 2.6 V @

Protected

VKAMOK

PWROK

VKAM

VDDH

DRVL

VSW

FBL

MC33998DW/R2

MCZ33998EG/R2

Device

V KAM

V DDH

V DDL

ORDERING INFORMATION

SWITCHING REGULATOR

EG SUFFIX (PB-FREE)

5.0 V

2.6 V

98ASB42344B

24-PIN SOICW

MCU

33998

-40°C to 125°C

DW SUFFIX

Document Number: MC33998

Temperature

Range (T

)

Rev. 2.0, 8/2006

24 SOICW

Package

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