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MC34166 Datasheet(PDF) 1 Page - ON Semiconductor |
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MC34166 Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 20 page  © Semiconductor Components Industries, LLC, 2002 January, 2002 – Rev. 6 1 Publication Order Number: MC34166/D 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 Figure 1. Simplified Block Diagram (Step Down Application) EA VO ILIMIT Vin 4 2 S Q R UVLO 3 5 L 5.05 V/ 3.0 A Reference Thermal PWM Oscillator 1 This device contains 143 active transistors. http://onsemi.com TO–220 TH SUFFIX CASE 314A See detailed ordering and shipping information in the package dimensions section on page 17 of this data sheet. ORDERING INFORMATION 1 5 MARKING DIAGRAMS 1 5 TO–220 TV SUFFIX CASE 314B 1 5 Heatsink surface connected to Pin 3 TO–220 T SUFFIX CASE 314D Pin 1. Voltage Feedback Input 2. Switch Output 3. Ground 4. Input Voltage/VCC 5. Compensation/Standby D2PAK D2T SUFFIX CASE 936A Heatsink surface (shown as terminal 6 in case outline drawing) is connected to Pin 3 x = 3 or 4 A = Assembly Location WL = Wafer Lot Y = Year WW = Work Week MC 3x166T AWLYWW MC 3x166T AWLYWW MC 3x166T AWLYWW 1 5 MC 3x166T AWLYWW 15 |
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