MC33166D2TR4(2002) 查看數據表（PDF） - ON Semiconductor

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MC33166D2TR4
(Rev.:2002)

3.0 A, Step−Up/Down/Inverting Switching Regulators

ON Semiconductor 

MC34166, MC33166

3.0 A, Step-Up/Down/

Inverting Switching

Regulators

The MC34166, MC33166 series are high performance fixed

frequency power switching regulators that contain the primary

functions required for dc–to–dc converters. This series was

specifically designed to be incorporated in step–down and

voltage–inverting configurations with a minimum number of external

components and can also be used cost effectively in step–up

applications.

These devices consist of an internal temperature compensated

reference, fixed frequency oscillator with on–chip timing components,

latching pulse width modulator for single pulse metering, high gain

error amplifier, and a high current output switch.

Protective features consist of cycle–by–cycle current limiting,

undervoltage lockout, and thermal shutdown. Also included is a low

power standby mode that reduces power supply current to 36 µA.

• Output Switch Current in Excess of 3.0 A

• Fixed Frequency Oscillator (72 kHz) with On–Chip Timing

• Provides 5.05 V Output without External Resistor Divider

• Precision 2% Reference

• 0% to 95% Output Duty Cycle

• Cycle–by–Cycle Current Limiting

• Undervoltage Lockout with Hysteresis

• Internal Thermal Shutdown

• Operation from 7.5 V to 40 V

• Standby Mode Reduces Power Supply Current to 36 µA

• Economical 5–Lead TO–220 Package with Two Optional Leadforms

• Also Available in Surface Mount D2PAK Package

• Moisture Sensitivity Level (MSL) Equals 1

Vin

ILIMIT

4

Oscillator

S

Q

R

2

PWM

UVLO

Thermal

L

Reference

EA

1

VO

5.05 V/

3.0 A

3

5

This device contains 143 active transistors.

Figure 1. Simplified Block Diagram

(Step Down Application)

http://onsemi.com

x = 3 or 4

A = Assembly Location

WL = Wafer Lot

Y = Year

WW = Work Week

MARKING

DIAGRAMS

1

5

TO–220

TH SUFFIX

CASE 314A

MC

3x166T

AWLYWW

1

5

TO–220

TV SUFFIX

CASE 314B

MC

3x166T

AWLYWW

Heatsink surface connected to Pin 3

TO–220

MC

T SUFFIX

3x166T

CASE 314D

AWLYWW

1

5

Pin 1. Voltage Feedback Input

2. Switch Output

3. Ground

4. Input Voltage/VCC

5. Compensation/Standby

1

5

D2PAK

D2T SUFFIX

CASE 936A

MC

3x166T

AWLYWW

Heatsink surface (shown as

terminal 6 in case outline

drawing) is connected to Pin 3 1

5

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 17 of this data sheet.

© Semiconductor Components Industries, LLC, 2002

1

January, 2002 – Rev. 6

Publication Order Number:

MC34166/D

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