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MC33163

POWER SWITCHING REGULATORS

Motorola => Freescale 

Order this document by MC34163/D

Power Switching Regulators

The MC34163 series are monolithic power switching regulators that

contain the primary functions required for dc–to–dc converters. This series is

specifically designed to be incorporated in step–up, step–down, and

voltage–inverting applications with a minimum number of external

components.

These devices consist of two high gain voltage feedback comparators,

temperature compensated reference, controlled duty cycle oscillator, driver

with bootstrap capability for increased efficiency, and a high current output

switch. Protective features consist of cycle–by–cycle current limiting, and

internal thermal shutdown. Also included is a low voltage indicator output

designed to interface with microprocessor based systems.

These devices are contained in a 16 pin dual–in–line heat tab plastic

package for improved thermal conduction.

• Output Switch Current in Excess of 3.0 A

• Operation from 2.5 V to 40 V Input

• Low Standby Current

• Precision 2% Reference

• Controlled Duty Cycle Oscillator

• Driver with Bootstrap Capability for Increased Efficiency

• Cycle–by–Cycle Current Limiting

• Internal Thermal Shutdown Protection

• Low Voltage Indicator Output for Direct Microprocessor Interface

• Heat Tab Power Package

MC34163

MC33163

POWER SWITCHING

REGULATORS

SEMICONDUCTOR

TECHNICAL DATA

16

1

P SUFFIX

PLASTIC PACKAGE

CASE 648C

(DIP–16)

16

1

DW SUFFIX

PLASTIC PACKAGE

CASE 751G

(SOP–16L)

Representative Block Diagram

Ipk Sense 8

VCC 7

Timing

Capacitor

6

– ILimit

+

+

OSC

9

Driver

Collector

10

Switch

Collector

11

5

Gnd

4

Control Logic

and Thermal

Shutdown

+

12

Gnd

13

Voltage

Feedback 1

3

Voltage

Feedback 2

2

VFB

+

+

–

LVI

LVI Output 1

+

+

–

+

14

Switch

Emitter

15

16

Bootstrap

Input

(Bottom View)

This device contains 114 active transistors.

MOTOROLA ANALOG IC DEVICE DATA

PIN CONNECTIONS

LVI Output 1

Voltage Feedback 2 2

Voltage Feedback 1 3

4

Gnd

5

Timing Capacitor 6

VCC 7

Ipk Sense 8

16 Bootstrap Input

15 Switch

14 Emitter

13

Gnd

12

11

Switch Collector

10

9 Driver Collector

(Top View)

ORDERING INFORMATION

Device

Operating

Temperature Range Package

MC34163DW

MC34163P

TA = 0° to +70°C

SOP–16L

DIP–16

MC33163DW

MC33163P TA = – 40° to +85°C

SOP–16L

DIP–16

© Motorola, Inc. 1996

Rev 2

1

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