2.7V to 6.5V Input, 3A/2A/2A Triple Buck Converter - TPS65266-1

TPS65266-1 (ACTIVE)

2.7V to 6.5V Input, 3A/2A/2A Triple Buck Converter



The TPS65266-1 incorporates 3 channels of high-efficiency synchronous buck converter for applications operating off the adaptor or battery with input voltage lower than 6 V.

The buck DC/DC converter integrates power MOSFETs for optimized power efficiency and reduces external component counts. The peak current mode control simplifies the compensation and fast transient response. High clock frequency allows smaller and low-value inductors and capacitors. External compensation supports optimized loop compensation and fast transient response. In light load condition, the buck converter operates in PSM mode for a reduction on the input power supplied to the system. Cycle-by-cycle overcurrent limiting with hiccup mode limits MOSFET power dissipation in short circuit or overloading fault conditions.

The TPS65266-1 features a power-good supervisor circuit that monitors all converter outputs. The PGOOD pin is asserted after the output voltages in each channel are in regulation and sequencing is done.

When continuous heavy overload or short circuit increases power dissipation in the buck converter, internal thermal protection circuit shuts off the device to prevent damage. Recovery from a thermal shutdown is automatic after the device has cooled sufficiently.


  • Operating Input Voltage Range 2.7 to 6 V
  • Feedback Reference Voltage 0.6 V ±1%
  • Maximum Continuous Output Current 3 A/2 A/2 A
  • Dedicated Enable and Soft Start
  • Accurate Start-Up Timing Control With Enable Pins Discharge
  • Pulse Skipping Mode (PSM) at Light Load
  • Cycle-by-Cycle Current Limiting With Hiccup Mode Overcurrent Protection
  • Adjustable Clock Frequency 250 kHz to 2.4 MHz
  • External Clock Synchronization
  • Power-Good Indicator
  • Overtemperature Protection

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Parametrics Compare all products in Buck Converter (Integrated Switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
TPS65266-1 TPS65263 TPS65266
2.7    4.5    2.7   
6    18    6.5   
2.7    0.6    0.6   
5.5    17    5.5   
3    3    3   
3    3    3   
250    550    250   
2400    650    2200   
0.34    0.74    0.34   
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit
Dynamic Voltage Scaling
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable   
Frequency Synchronization
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable   
Current Mode    Current Mode    Current Mode   
100    100    100   
-40 to 85    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog