TPS65279 4.5-V to 18-V Input, Dual 5-A Synchronous Step-Down Converter | TI.com

TPS65279 (ACTIVE) 4.5-V to 18-V Input, Dual 5-A Synchronous Step-Down Converter

 

Description

TPS65279 is a monolithic dual synchronous buck converter with wide 4.5-V to 18-V operating 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 control is designed to simplify its application while giving the designers options to optimize their usage according to the target applications.

Two bucks in TPS65279 can be paralleled to delivery up to 10-A load current by using current sharing mode, connect ISHARE pin high. Two phase operation in current sharing reduces system filtering capacitance and inductance, alleviates EMI and improves output voltage ripple and noise.

TPS65279 features a dedicated enable pin. An independent soft-start pin provides flexibility in power up programmability. Constant frequency peak current mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle overcurrent protection and hiccup mode operation limit MOSFET power dissipation in short circuit or over loading fault conditions.

Low-side reverse overcurrent protection also prevents excessive sinking current from damaging the converter. TPS65279 also features a light load pulse skipping mode (PSM) controlled by MODE pin configuration.

The TPS65279 is available in a 32-pin thermally-enhanced HTSSOP (DAP) package and 36-pin 6-mm × 6-mm VQFN (RHH) package.

Features

  • 4.5-V to 18-V Wide Input Voltage Range
  • Programmable Slew Rate Control for Output
    Voltage Transition
  • Up to 5-A Maximum Continuous Output Current in
    Buck 1 and Buck 2
  • Buck 1 and Buck 2 can be Paralleled to Deliver up
    to 10-A Current
  • Pulse Skipping Mode to Achieve High Efficiency in
    Light Load
  • Adjustable Switching Frequency
    200 kHz to 1.6 MHz Set by External Resistor
  • Dedicated Enable and Soft-Start for Each Buck
  • Peak Current-Mode Control With Simple
    Compensation Circuit
  • Cycle-by-Cycle Overcurrent Protection
  • 180° Out-of-Phase Operation to Reduce Input
    Capacitance and Power Supply Induced Noise
  • Over Temperature Protection
  • Available in 32-Pin Thermally Enhanced HTSSOP
    (DAP) and 36-Pin VQFN 6-mm × 6-mm (RHH)
    Packages

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
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)
TPS65279 Order now 4.5     18     0.6     15     5     2     200     1600     10     Enable
Light Load Efficiency
Phase Interleaving    
Current Mode     95     -40 to 125     Catalog     HTSSOP | 32
VQFN | 36    
Converter     32HTSSOP: 89 mm2: 8.1 x 11 (HTSSOP | 32)
36VQFN: 36 mm2: 6 x 6 (VQFN | 36)    
TPS563900 Order now 4.5     18     0.6     15     3.5     2     200     1600     1.2     Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification    
Current Mode     100     -40 to 85     Catalog     HTSSOP | 32     Converter     32HTSSOP: 89 mm2: 8.1 x 11 (HTSSOP | 32)    
TPS65273V Order now 4.5     18     0.6     15     3.5     2     200     1600     10     I2C
Light Load Efficiency
Phase Interleaving
VID Interface    
Current Mode     95     -40 to 125     Catalog     HTSSOP | 32
VQFN | 36    
Converter     32HTSSOP: 89 mm2: 8.1 x 11 (HTSSOP | 32)
36VQFN: 36 mm2: 6 x 6 (VQFN | 36)    
TPS65276V Order now 4.5     18     0.6     15     6     2     200     1600     10     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable
Adaptive/Dynamic Voltage Scaling    
Current Mode     95     -40 to 125     Catalog     HTSSOP | 32
VQFN | 36    
Converter     32HTSSOP: 89 mm2: 8.1 x 11 (HTSSOP | 32)
36VQFN: 36 mm2: 6 x 6 (VQFN | 36)    
TPS65279V Order now 4.5     18     0.6     15     5     2     200     1600     10     Enable
Light Load Efficiency
Multiple Outputs
Phase Interleaving    
Current Mode     95     -40 to 125     Catalog     HTSSOP | 32
VQFN | 36    
Converter     32HTSSOP: 89 mm2: 8.1 x 11 (HTSSOP | 32)
36VQFN: 36 mm2: 6 x 6 (VQFN | 36)