TPS5124 TPS5124 Dual Channel Synchronous Step-Down PWM Controller | TI.com

TPS5124 (ACTIVE) TPS5124 Dual Channel Synchronous Step-Down PWM Controller

 

Description

The TPS5124 is dual independent high efficiency synchronous step-down controller. It supports a low-voltage/high-current power supply applications that use either a 5-V or 12-V bus voltage. Since both controllers of the TPS5124 operate 180 degree out-of-phase, the input current ripple is minimized resulting in a smaller input capacitance and reduced power supply cost.

The current protection circuit detects the drain-to-source voltage drop across the high-side and low-side power MOSFET while it is conducting. Also, the current protection circuit has a temperature coefficient to compensate for the RDS(on) variation of the MOSFET. This resistor-less current protection and built-in boost diode simplify the system design and reduces the external parts count. Other features such as undervoltage lockout, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability.

Features

  • High Efficiency – No Current Sense Resistor Required, RDS(on) Overcurrent Detection with Temperature Compensation
  • Adjustable Output Voltage Down to 0.9 V
  • Voltage-Mode PWM Control: Maximum 500-kHz Operation
  • 180° Out-of-Phase Control
  • Individual Standby and Soft-Start for Each Channel - Easy Power Sequencing
  • Overvoltage and Undervoltage Protection
  • Built-In Boot-Strap Diode
  • Built-In 5-V Linear Regulator
  • Accurate ± 1% 0.85-V Reference
  • APPLICATIONS
    • Consumer Game Systems
    • DSP Applications
    • Digital Set-Top Box
    • VGA and Sound Cards

Parametrics

Compare all products in Buck controllers (external 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 (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
TPS5124 Order now 4.5     15     0.9     12     20     2     1     50     500     1.1     Enable
Light Load Efficiency
Power Good
Synchronous Rectification    
80     -40 to 85     Catalog     TSSOP | 30     Controller     Voltage Mode    
TPS5120 Samples not available 4.5     28     0.9     26     20     2     2     100     500     1.1     Enable
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification    
80     -40 to 85     Catalog     TSSOP | 30     Controller     Voltage Mode    
TPS51221 Samples not available 4.5     28     1     12     20     2     1     200     1000     1.3     Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification    
99     -40 to 85     Catalog     WQFN | 32     Controller     Current Mode    
TPS51222 Order now 4.5     32     1     12     20     2     1     200     1000     0.8     Enable
Frequency Synchronization
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification    
99     -40 to 85     Catalog     WQFN | 32     Controller