TPS53125 4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller | TI.com

TPS53125 (ACTIVE)

4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller

 

Description

The TPS53125 is a dual, adaptive on-time D-CAP2™ mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of various end equipment’s power bus regulators with a low external component count and low standby consumption. The main control loop for the TPS53125 uses the D-CAP™ Mode topology which provides a very fast transient response with no external component.

The TPS53125 also has a proprietary circuit that enables the device to adapt not only low equivalent series resistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. The part provides a convenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to 5.5 V.

The TPS53125 is available in 24-pin RGE and PW packages, and is specified from –40°C to 85°C ambient temperature range.

Features

  • D-CAP2™ Mode Control
    • Fast Transient Response
    • No External Parts Required for Loop Compensation
    • Compatible With Ceramic Output Capacitors
  • High Initial Reference Accuracy (±1%)
  • Low Output Ripple
  • Wide Input Voltage Range: 4.5 V to 24 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Low-Side RDS(ON) Loss-Less Current Sensing
  • Adaptive Gate Drivers with Integrated Boost Diode
  • Adjustable Soft Start
  • Non-Sinking Pre-Biased Soft Start
  • 350-kHz Switching Frequency
  • Cycle-by-Cycle Over-Current Limiting Control
  • 30-mV to 300-mV OCP Threshold Voltage
  • Thermally Compensated OCP by 4000 ppm/°C at ITRIP
  • APPLICATIONS
    • Point-of-Load Regulation in Low Power Systems for
      Wide Range of Applications
      • Digital TV Power Supply
      • Networking Home Terminal
      • Digital Set-Top Box (STB)
      • DVD Player/Recorder
      • Gaming Consoles

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 (#) 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
TPS53125 Order now 4.5     24     0.76     5.5     15     2     1     350     350     0.45     Enable
Pre-Bias Start-Up
Synchronous Rectification    
89     -40 to 85     Catalog     TSSOP | 24
VQFN | 24    
Controller     D-CAP2    
TPS53126 Samples not available 4.5     24     0.76     5.5     15     2     1     350     700     0.45     Enable
Pre-Bias Start-Up
Synchronous Rectification    
89     -40 to 85     Catalog     TSSOP | 24
VQFN | 24    
Controller     D-CAP2    
TPS53127 Order now 4.5     24     0.76     5.5     15     2     1     700     700     0.45     Enable
Pre-Bias Start-Up
Synchronous Rectification    
89     -40 to 85     Catalog     TSSOP | 24
VQFN | 24    
Controller     D-CAP2