TPS65265 4.5- to 17-V Input Voltage, 5-A/3-A/2-A Output Current Triple Buck Converter |


4.5- to 17-V Input Voltage, 5-A/3-A/2-A Output Current Triple Buck Converter



The TPS65265 incorporates triple synchronous buck converters with 4.5-V to 17-V wide input voltage range that encompassed most intermediate bus voltage operating off 5-, 9-, 12- or 15-V power bus or battery. The converter with constant frequency peak current mode is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The switching frequency of the converters can be adjustable from 250 kHz to 2.3 MHz with an external resistor or external clock. 120° out-of-phase operation between Buck1, Buck2, and Buck3 minimizes the input filter requirements.

The TPS65265 operates in pulse skipping mode (PSM) with driving MODE pin to high or leaving float and operates in force continuous current mode (FCC) with connecting MODE pin to GND. PSM mode provides high efficiency by reducing switching losses at light load and FCC mode reduces noise susceptibility and RF interference.

The TPS65265 is available in a 32-pin thermal enhanced QFN (RHB) 5-mm × 5-mm thin package.


  • Operating Input Voltage Range 4.5 V to 17 V
  • Feedback Reference Voltage 0.6 V ±1.33%
  • Continuous Output Current 5 A/3 A/2 A
  • Adjustable Clock Frequency from 250 kHz to
    2.3 MHz
  • External Synchronization Oscillator
  • 120° Out of Phase for Buck1, Buck2, Buck3
  • Dedicated Enable Pins for Each Buck
  • Fixed SS Time for Each Buck (2.4 ms)
  • Automatic Power-Up/Power-Down Sequence and Adjustable Interval Time Between Bucks (6 Combinations)
  • Support Pulse Skipping Mode (PSM) and Forced Continuous Current Mode (FCCM)
  • Output Voltage Power Good Indicator and Adjustable Delay Time
  • Thermal Overloading Protection
  • 32-Pin QFN (RHB) 5-mm × 5-mm Package

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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
Package size: mm2:W x L (PKG)
TPS65265 TPS65261
4.5     4.5    
17     18    
0.6     0.6    
5     3    
3     3    
250     250    
2300     2000    
0.0115     0.6    
UVLO Adjustable    
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable    
Current Mode     Current Mode    
100     95    
-40 to 85     -40 to 85    
Catalog     Catalog    
VQFN | 32     VQFN | 32    
Converter     Converter    
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    

Design tool

WEBENCH® Designer TPS65265

  Min   Max Range
Vin1  V 4.50 to 17.00V
Vout1  V 0.60 to 5.50V
Iout1  A ≤ 5.00A
Vin2  V 4.50 to 17.00V
Vout2  V 0.60 to 5.50V
Iout2  A ≤ 3.00A
Vin3  V 4.50 to 17.00V
Vout3  V 0.60 to 5.50V
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'