TPS65921

(ACTIVE) Integrated Power Management IC (PMIC) with 3 DC/DC's, 4 LDOs, USB HS Transceiver

Diagrams

Functional diagram

Description

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.

Features

  • 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

Parametrics

Regulated Outputs (#) 7    
Processor Supplier Texas Instruments    
Processor Name OMAP35xx    
Vin (Min) (V) 2.7    
Vin (Max) (V) 5.5    
LDO 4    
Step-Up DC/DC Converter 1    
Step-Down DC/DC Converter 3    
Iout (Max) (A) 1.2    
Special Features Comm Control^Power Sequencing    
Rating Catalog    
Operating Temperature Range (C) -40 to 85    
Pin/Package 120BGA MICROSTAR JUNIOR    
Approx. Price (US$) 3.20 | 1ku    

Companion Products

Technical Documents

Datasheet (1)

Errata (1)

Application notes (4)

User guides (2)

Selection guides (3)

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