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TPS5124

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15-V, dual-channel synchronous buck PWM controller

Product details

Vin (min) (V) 4.5 Vin (max) (V) 15 Vout (min) (V) 0.9 Vout (max) (V) 12 Iout (max) (A) 20 Iq (typ) (mA) 1.1 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Features Enable, Light Load Efficiency, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 2 Number of phases 1 Rating Catalog Type Controller
Vin (min) (V) 4.5 Vin (max) (V) 15 Vout (min) (V) 0.9 Vout (max) (V) 12 Iout (max) (A) 20 Iq (typ) (mA) 1.1 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Features Enable, Light Load Efficiency, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 2 Number of phases 1 Rating Catalog Type Controller
TSSOP (DBT) 30 49.92 mm² 7.8 x 6.4
  • 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

  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet TPS5124 Dual Channel Synchronous Step-Down PWM Controller datasheet 10 Jul 2003
User guide TPS5124 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 03 Mar 2022
More literature Исходные проекты ll 13 May 2011

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Reference designs

PMP3199 — Sync Buck for Silver Box (3.3V@25A)

This reference evaluation module, featuring the TPS5124, is a solution for 3.3V and 5V power rails inside (desktop) PCs.
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TSSOP (DBT) 30 View options

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