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 Transformer Driver

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (A)
Soft Start
Special Features
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Operating Temperature Range (C)
Package Group
Estimated Package Size (WxL) (mm2)
Iout (Max) (A)
Shutdown Current (Typ) (uA)
Switch Current Limit (Typ) (A)
Undervoltage Lockout
SN6501 SN6505A SN6505B
  2.25     2.25    
  5.5     5.5    
  0     0    
  16     16    
0.25       1    
None     Fixed     Fixed    
Enable     Enable
Power Good    
Power Good    
410     100     100    
620     600     1600    
Catalog     Catalog     Catalog    
-40 to 125     -55 to 125     -55 to 125    
SOT-23     SOT-23     SOT-23    
5SOT-23: 4.64 mm2: 1.6 x 2.9     6SOT-23: 4.64 mm2: 1.6 x 2.9     6SOT-23: 4.64 mm2: 1.6 x 2.9    
  1.5     1.5    
5SOT-23     6SOT-23     6SOT-23    
Converter (Integrated Switch)        
  Vin<1.7     Vin<1.7V    

Other qualified versions of SN6501

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