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

TPS65266 (ACTIVE)

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

 

Description

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.

Features

  • 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
    Discharge
  • 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

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 -40.00 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)
TPS65266 Order now 2.7     6.5     0.6     5.5     3     3     250     2400     0.34     Enable
Frequency Synchronization
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
Current Mode     100     -40 to 85     Catalog     VQFN | 32     Converter     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
TPS65263 Order now 4.5     18     0.6     17     3     3     550     650     0.74     Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable
Adaptive/Dynamic Voltage Scaling    
Current Mode     100     -40 to 85     Catalog     VQFN | 32     Converter     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
TPS65266-1 Order now 2.7     6     0.6     5.5     3     3     250     2400     0.34     Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
Current Mode     100     -40 to 85     Catalog     VQFN | 32     Converter     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)