Product details


We are not able to display this information. Please refer to the product data sheet.

Package | Pins | Size

SSOP (DB) 20 38 mm² 5.3 x 7.2 open-in-new Find other Buck controllers (external switch)


  • Step-Down DC-DC Converter
  • Three Operation-Modes
    • Heavy Load:
      • Fixed Frequency PWM
      • Hysteretic (User Selectable)
    • Light Load:
      • Skip Mode
  • 4.5-V to 25-V Input Voltage Range
  • Adjustable Output Voltage Down to 1.2 V
  • 95% Efficiency
  • Standby Control
  • Overcurrent Protection
  • UVLO for Internal 5-V Regulation
  • Low-Standby Current . . . 0.5 mA Typical
  • TA = -40°C to 85°C
open-in-new Find other Buck controllers (external switch)


The TPS5103 is a synchronous buck dc/dc controller, designed for notebook PC system power. The controller has three user-selectable operation modes available: hysteretic mode, fixed-frequency PWM control, or SKIP control.

In high-current applications, where fast transient response is advantageous for reducing bulk capacitance, the hysteretic mode is selected by connecting the RT pin to VREF5. Selecting the PWM/SKIP modes for less demanding transient applications is ideal for conserving notebook battery life under light load conditions. The device includes high-side and low-side MOSFET drivers capable of driving low r ds(on) N-channel MOSFETs.

The user-selectable overcurrent protection (OCP) threshold is set by an external TRIP-pin resistor in order to protect the system. The TPS5103 is configured so that a current-sense resistor is not required, improving the operating efficiency.

open-in-new Find other Buck controllers (external switch)

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 1
Type Title Date
* Datasheet Multiple Mode Synchronous DC/DC Controller datasheet (Rev. A) May 16, 2001

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

CAD/CAE symbols

Package Pins Download
SSOP (DB) 20 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​


Engineer It: Leverage TI’s online toolbox to tackle EMI before touching a soldering iron

Everything you ever wanted to know about EMI: A comprehensive training on addressing potential pitfalls with DC/DC switching regulator EMI

Posted: 23-Jan-2018
Duration: 24:13

Related videos