Transformer Driver for Isolated Power Supplies - SN6501


Transformer Driver for Isolated Power Supplies

Recommended alternative parts

  • TPS55010  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   2.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS


The SN6501 is a monolithic oscillator/power-driver, specifically designed for small form factor, isolated power supplies in isolated interface applications. The device drives a low-profile, center-tapped transformer primary from a 3.3-V or 5-V DC power supply. The secondary can be wound to provide any isolated voltage based on transformer turns ratio.

The SN6501 consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive the ground referenced N-channel power switches. The internal logic ensures break-before-make action between the two switches.

The SN6501 is available in a small SOT-23 (5) package, and is specified for operation at temperatures from –40&de;C to 125°C.


  • Push-Pull Driver for Small Transformers
  • Single 3.3-V or 5-V Supply
  • High Primary-side Current Drive:
    • 5-V Supply: 350 mA (Max)
    • 3.3-V Supply: 150 mA (Max)
  • Low Ripple on Rectified Output Permits
    Small Output Capacitors
  • Small 5-Pin SOT-23 Package

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Parametrics Compare all products in Isolated DC/DC Converter

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Switching Frequency (Max) (kHz)
Soft Start
Special Features
Operating Temperature Range (C)
Iout (A)
Approx. Price (US$)
SN6501 SN6505A SN6505B
3     2.25     2.25    
5.5     5.5     5.5    
0     0     0    
11     16     16    
620     600     1600    
None     Fixed     Fixed    
Enable     Enable
Power Good    
Power Good    
Catalog     Catalog     Catalog    
-40 to 125     -55 to 125     -55 to 125    
0.25     1     1    
5SOT-23     6SOT-23     6SOT-23    
0.80 | 1ku     2.75 | 1ku     2.75 | 1ku    

Other qualified versions of SN6501

Version Part Number Definition
Automotive SN6501-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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