TPS65266 2.7V to 6.5V Input Voltage, 3A/2A/2A Output Current Synchronous Buck Converters |


2.7V to 6.5V Input Voltage, 3A/2A/2A Output Current Synchronous Buck Converters



The TPS65266 incorporates 3 channels of high-efficiency synchronous buck converter for applications operating off the adaptor or battery with input voltage lower than 6.5 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 FCC mode for a reduction in noise susceptibility and RF interference. Cycle-by-cycle overcurrent limiting with hiccup mode limits MOSFET power dissipation in short circuit or overloading fault conditions.

The TPS65266 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 6.5 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
  • Forced Continuous Current (FCC) Mode at Light Load
  • Cycle-by-Cycle Current Limiting With Hiccup Mode
    Overcurrent Protection
  • Adjustable Clock Frequency 250 kHz to 2.4 MHz
  • ExternalClock Synchronization
  • Power-Good Indicator
  • Overtemperature Protection

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Parametrics Compare all products in Buck converters (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)
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
TPS65266 TPS65263 TPS65266-1
2.7     4.5     2.7    
6.5     18     6    
0.6     0.6     0.6    
5.5     17     5.5    
3     3     3    
3     3     3    
250     550     250    
2400     650     2400    
0.34     0.74     0.34    
Frequency Synchronization
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
Light Load Efficiency
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    
VQFN | 32     VQFN | 32     VQFN | 32    
Converter     Converter     Converter    

Design tool

WEBENCH® Designer TPS65266

  Min   Max Range
Vin1  V 2.70 to 6.50V
Vout1  V 0.6 to 5V
Iout1  A ≤ 3.00A
Vin2  V 2.70 to 6.50V
Vout2  V 0.6 to 5V
Iout2  A ≤ 2.00A
Vin3  V 2.70 to 6.50V
Vout3  V 0.6 to 5V
Iout3  A ≤ 2.00A
Ambient Temp  °C -40 to 125°C

Footprint BOM Cost Efficiency

'Cvdd Cldo12 Rp L1_ch1 Cin_ch1 Rfbb_ch1 Rfbt_ch1 C1_ch1 Cout_ch1 L1_ch2 Cin_ch2 Rfbb_ch2 Rfbt_ch2 C1_ch2 Cout_ch2 Cin_ch3 Cout_ch3 Rfbt_ch3 Rfbb_ch3 Cin_ch4 Cout_ch4 Rfbt_ch4 Rfbb_ch4'