3-V to 28-V, dual-synchronous buck controller for low output voltage rails in embedded computing

A newer version of this product is available
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS53124 ACTIVE 4.5-V to 24-V, synchronous dual-D-CAP buck controller This improved product does not require a bias voltage.

Product details


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VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other Buck controllers (external switch)


  • High Efficiency, Low-Power Consumption, Shutdowns to <1 µA
  • Fixed Frequency Emulated On-Time Control, Frequency Selectable From Three Options
  • D-CAP Mode Enables Fast Transient Response
  • Auto-Skip Mode
  • Less Than 1% Initial Reference Accuracy
  • Low Output Ripple
  • Wide Input Voltage Range: 3 V to 28 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
  • Internal 1.2-ms Voltage-Servo Soft Start
  • Power-Good Signals for Each Channel With Delay Timer
  • Output Discharge During Disable, Fault
    • I/O and Low Voltage System Bus in Embedded Computing Systems

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The TPS59124 is a dual, adaptive on-time D-CAP mode synchronous buck controller. This device enables system designers to cost effectively complete the suite of embedded computer power bus regulators with the absolute lowest external component count and lowest standby consumption. The fixed-frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high-efficiency down to milliampere range. The main control loop for the TPS59124 uses the D-CAP mode that optimized for low-ESR output capacitors such as POSCAP or SP-CAP promises fast transient response with no external compensation. Simple and separate power good signals for each channel allow flexibility of power sequencing. The device provides convenient and efficient operation with supply input voltages (V5IN, V5FILT) ranging from 4.5 V to 5.5 V, conversion voltages (drain voltage for the synchronous high-side MOSFET) from 3 V to 28 V and output voltages from 0.76 V to 5.5 V.

The TPS59124 is available in 24-pin QFN package specified from –40°C to 85°C ambient temperature range.

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Technical documentation

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Type Title Date
* Data sheet Dual Synchronous Step-Down Controller for Low Voltage Power Rails in Embedded C datasheet Apr. 30, 2010
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018

Design & development

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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

Sync Buck for Intel Atom E6xx Tunnel Creek (1.8V @ 5A)
PMP5855 — The PMP5855 is designed to use a regulated 12V (8V-14V) bus to produce 10 regulated outputs in sequence for an Atom E6xx Tunnel Creek Power System. The PMP5855 is specially designed to demonstrate the TPS59610 Atom E6xx CPU and GPU Vcore regulators while providing a number of test points to evaluate (...)

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VQFN (RGE) 24 View options

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