MC33470DW 데이터 시트보기 (PDF) - Motorola => Freescale

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MC33470DW

Synchronous Rectification DC/DC Converter Programmable Integrated Controller

Motorola => Freescale 

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MC33470

Synchronous Rectification

DC/DC Converter

Programmable Integrated

Controller

The MC33470 is a digitally programmable switching voltage regulator,

specifically designed for Microprocessor supply, Voltage Regulator Module

and general purpose applications, to provide a high power regulated output

voltage using a minimum of external parts. A 5–bit digital–to–analog converter

defines the dc output voltage.

This product has three additional features. The first is a pair of high speed

comparators which monitor the output voltage and expedite the circuit

response to load current changes. The second feature is a soft start circuit

which establishes a controlled response when input power is applied and

when recovering from external circuit fault conditions. The third feature is two

output drivers which provide synchronous rectification for optimum

efficiency.

This product is ideally suited for computer, consumer, and industrial

equipment where accuracy, efficiency and optimum regulation performance

is desirable.

MC33470 Features:

• 5–Bit Digital–to–Analog Converter Allows Digital Control of

Output Voltage

• High Speed Response to Transient Load Conditions

• Output Enable Pin Provides On/Off Control

• Programmable Soft Start Control

• High Current Output Drives for Synchronous Rectification

• Internally Trimmed Reference with Low Temperature Coefficient

• Programmable Overcurrent Protection

• Overvoltage Fault Indication

• Functionally Similar to the LTC1553

SYNCHRONOUS

RECTIFICATION DC/DC

CONVERTER

PROGRAMMABLE

INTEGRATED CONTROLLER

SEMICONDUCTOR

TECHNICAL DATA

20

1

DW SUFFIX

PLASTIC PACKAGE

CASE 751D

(SO–20L)

PIN CONNECTIONS

G2 1

PVCC 2

PGnd 3

AGnd 4

VCC 5

Sense 6

Imax 7

Ifb 8

SS 9

Compensation 10

20 G1

19 OUTEN

18 VID0

17 VID1

16 VID2

15 VID3

14 VID4

13 Pwrgd

12 Fault

11 OT

(Top View)

MOTOROLA ANALOG IC DEVICE DATA

ORDERING INFORMATION

Device

Operating

Temperature Range

Package

MC33470DW TA = 0° to +75°C

SO–20L

© Motorola, Inc. 1999

Rev 1

1

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