Product details


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  • Three Step-Down Converters:
    • Up to 1.2 A of Output Current for VDD1
      • TPS65921B Supports VDD1 up to 1.2 A
      • TPS65921B1 Supports VDD1 up to 1.4 A (Necessary for 1-GHz Operation)
    • SmartReflex Dynamic Voltage Management
    • 3.2-MHz Fixed Frequency Operation
    • VIN Range from 2.7 to 4.5 V
    • Typical 30 µA Quiescent per Converter
  • Four General-Purpose Configurable LDOs:
    • Dynamic Voltage Scaling
    • 220-mA Maximum Current for One LDO
    • VIN Range from 2.7 to 4.5 V
    • 2 LDOs With Low Noise and High PSRR
  • RTC With Alarm Wake-Up Mechanism
  • Clock Management
    • 32-kHz Crystal Oscillator
    • Clock Slicer for 26, 19.2, and 38.4 MHz
    • HF Clock Output Buffer
  • USB:
    • USB HS 2.0 Transceiver
    • USB 1.3 OTG-Compliant
    • 12-Bit ULPI 1.1 Interface
    • USB Power Supply (5-V CP for VBUS)
  • Control
    • High-Speed I2C Interface
    • All Resource Configurable by I2C
  • Keypad Interface up to 8 × 8
  • 10-Bit A/D Converter
  • Hot-Die, Thermal Shutdown Protection
  • µ*BGA 120 Balls ZQZ
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The TPS65921 device is a highly integrated power-management circuit (IC) that supports the power and peripheral requirements of the OMAP application processors. The device contains power management, a universal serial bus (USB) high-speed (HS) transceiver, an analog-to-digital converter (ADC), a real-time clock (RTC), a keypad interface, and an embedded power control (EPC). The power portion of the device contains three buck converters, two controllable by a dedicated SmartReflex class-3 interface, multiple low-dropout (LDO) regulators, an EPC to manage the power-sequencing requirements of OMAP, and an RTC module. The USB module provides an HS 2.0 transceiver suitable for direct connection to the OMAP universal transceiver macrocell interface (UTMI) + low pin interface (ULPI) with an integrated charge pump (CP).

The device also provides auxiliary modules: ADC, keypad interface, and general-purpose inputs/outputs (GPIOs) muxed with the JTAG functions. The keypad interface implements a built-in scanning algorithm to decode hardware-based key presses and to reduce software use, with multiple additional GPIOs that can be used as interrupts when they are configured as inputs.

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Technical documentation

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Type Title Date
* Datasheet TPS65921 Power Management and USB Single Chip datasheet (Rev. G) Sep. 29, 2014
* Errata TPS65921 Silicon Errata Sep. 08, 2010
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Power Tips: My personal IoT and how I would power my favorite Jun. 22, 2014
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013
Application notes TPS65921 PCB Layout Guidelines (Rev. A) Mar. 15, 2012
User guides TPS65921 Register Manual (Rev. C) Mar. 15, 2012
Application notes Using Power IC for OMAP34xx to 36xx Family Jan. 24, 2011
User guides Differences in Features for TPS65920 and TPS65921 (Rev. B) Dec. 17, 2010
Application notes TPS65950/930/920/921 USB Eye Diagram Trimming Nov. 19, 2010
Application notes TPS65921 USB Charger Detection Nov. 17, 2010

Design & development

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

Software development

Linux Driver for TWL4030
TWL4030SW-LINUX The Linux driver supports the TWL4030 series of Integrated Power Management ICs. The Linux driver supports communication through the I2C bus and interfaces with various sub-systems.


Linux Mainline Status

Available in Linux Main line: Yes
Available through N/A

Supported Devices:

  • twl4030
  • twl5030 (...)

Design tools & simulation

SWCM005.ZIP (306 KB) - IBIS Model

CAD/CAE symbols

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Ordering & quality

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