DATA SHEET www.onsemi.com
Inverting Switching Regulators - Step-Up/Down
3.0 A
MC34166, MC33166
The MC34166, MC33166 s...
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
P...