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Manufacturer Part #

MC34166TG

MC34166 Series 40V 3A 79 kHz Step−Up/Down/Inverting Switching Regulator-TO-220-5

ECAD Model:
Mfr. Name: ON Semiconductor
Standard Pkg:
Product Variant Information section
Date Code: 2022
Product Specification Section
Technical Attributes
Attributes Table
Topology: Buck/Boost/Inverting
Input Voltage: 7.5V to 40V
Output Current-Max: 3A
Output Type: Adjustable
Switching Frequency-Max: 79kHz
Operating Temp Range: 0°C to 70°C
Duty Cycle-Max: 100%
Efficiency: 82.8%
No. of Outputs: 1
Storage Temperature Range: -65°C to +150°C
Load Regulation: 3mV
Load Regulation (%): 0.005%
Moisture Sensitivity Level: 1
Package Style:  TO-220-5
Mounting Method: Flange Mount
Features & Applications

The MC34166 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.

Key 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 µA
  • 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
Pricing Section
Global Stock:
260
USA:
260
On Order:
0
Factory Stock:Factory Stock:
0
Factory Lead Time:
18 Weeks
Minimum Order:
1
Multiple Of:
1
Total
$1.40
USD
Quantity
Web Price
1
$1.40
40
$1.26
200
$1.21
750
$1.16
3,000+
$1.12
Product Variant Information section