Texas Instruments TPS659128x PMU for Processor Power
Texas Instruments TPS659128x Power Management Unit (PMU) for Processor Power provides four configurable step-down converters with up to 2.5A output current and ten LDO regulators for external use. These LDOs can be supplied from either a battery or a pre-regulated supply. Each specific part number has a different factory-programmed power-up and power-down sequence.
The Texas Instruments TPS659128x integrates a 32kHz RC oscillator to sequence all resources during power-up or power-down. All LDOs and DC-DC converters can be controlled by an I2C or SPI interface or basic enable pins after boot. Additionally, a voltage-scaling interface allows for transitioning the DC-DC converters to a different voltage through I2C or basic roof-floor control. Three LED drivers with an advanced dimming feature are integrated inside the device.
General-purpose input-output (GPIO) functionality is multiplexed with various pins, including LED pins, ENx pins, and SPI pins when not used. Each GPIO can be configured as part of the power-up sequence to control external resources. One SLEEP pin enables switching between the active mode and preprogrammed sleep mode for power optimization. The TPS659128x device comes in a 9-pin × 9-pin DSBGA package (3.6mm × 3.6mm) with a 0.4mm pitch.
Features
- Four step-down converters
- Input voltage (VIN) range from 2.7V to 5.5V
- Power save mode at light load current
- Output voltage accuracy in PWM mode ±2%
- Typical 26µA quiescent current per converter
- Dynamic voltage scaling
- 100% duty cycle for lowest dropout
- Ten LDOs
- Eight general-purpose LDOs
- Output voltage range from 0.8V to 3.3V
- A typical 32µA quiescent current per LDO
- Two low-noise RF-LDOs
- Output voltage range from 1.6V to 3.3V
- Pre-regulation support by separate power inputs
- Eco-mode™ control scheme
- VIN range of LDOs respective to the following voltage ranges
- 1.8V to 3.6V
- 3V to 5.5V
- Three LED drivers
- Internal dimming using I2C
- Up to 20mA per current sink
- Thermal monitoring
- High-temperature warning
- Thermal shutdown
- Bypass switch
- Used with DCDC4 in applications powering a Radio Frequency Power Amplifier (RF-PA)
- Interface
- I2C interface
- Power I2C interface for Dynamic Voltage Scaling (DVS)
- Serial Peripheral Interface (SPI)
- 32kHz RC oscillator
- Undervoltage lockout, battery fault comparator, and long button-press detection
- 3.6mm × 3.6mm DSBGA package with 0.4mm pitch
Applications
- Smartphones
- Wireless routers and switches
- Tablets
- Industrial applications
- LTE modem
- GPS
Functional Block Diagram
