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

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

 

Description

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.

Features

  • 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

WEBENCH® Designer TPS65265

  Min   Max Range
Vin1  V 4.50 to 17.00V
Vout1  V 0.6 to 5.5V
Iout1  A ≤ 5.00A
 
Vin2  V 4.50 to 17.00V
Vout2  V 0.6 to 5.5V
Iout2  A ≤ 3.00A
 
Vin3  V 4.50 to 17.00V
Vout3  V 0.6 to 5.5V
Iout3  A ≤ 2.00A
 
Ambient Temp  °C -40.00 to 160.00°C

Parametrics

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Part number Order 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) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS65265 Order now 4.5     17     0.6     15     5     3     250     2300     0.0115     Enable
UVLO Adjustable
Soft Start Fixed    
Current Mode     100     -40 to 85     Catalog     VQFN | 32     Converter     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
TPS65261 Order now 4.5     18     0.6       3     3     250     2000     0.6     Enable
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable
Soft Start Adjustable    
Current Mode     95     -40 to 85     Catalog     VQFN | 32     Converter     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)