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MC33166

ON Semiconductor
Part Number MC33166
Manufacturer ON Semiconductor
Description Step-Up/Down/Inverting Switching Regulators
Published Apr 9, 2007
Detailed Description DATA SHEET www.onsemi.com Inverting Switching Regulators - Step-Up/Down 3.0 A MC34166, MC33166 The MC34166, MC33166 s...
Datasheet PDF File MC33166 PDF File

MC33166
MC33166


Overview
DATA SHEET www.
onsemi.
com Inverting Switching Regulators - Step-Up/Down 3.
0 A MC34166, MC33166 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 mA.
Features • 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 mA • Economical 5−Lead TO−220 Package with Two Optional Leadforms • Also Available in Surface Mount D2PAK Package • Moisture Sensitivity Level (MSL) Equals 1 • Pb−Free Packages are Available Vin ILIMIT 4 Oscillator S Q R 2 PWM UVLO Thermal L Reference EA 1 3 5 This device contains 143 active transistors.
Figure 1.
Simplified Block Diagram (Step Down Application) VO 5.
05 V/ 3.
0 A MARKING DIAGRAMS 1 MC 5 3x166T AWLYWWG TO−220 TV SUFFIX CASE 314B Heatsink surface connected to Pin 3 1 5 D2PAK D2T SUFFIX CASE 936A MC 3x166T AWLYWWG 1 5 Heatsink surface (shown as terminal 6 in case outline drawing) is connected to Pin 3 x = ...


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