Overview
The TPS65070RSLR is a single-chip power management IC (PMIC) from Texas Instruments, designed for portable applications. It integrates a battery charger with power path management for a single Li-Ion or Li-Polymer cell, which can be supplied by a USB port or a DC voltage from a wall adapter. The device features three highly efficient 2.25-MHz step-down converters, two general-purpose LDOs, and an inductive boost converter for white LED strings. This PMIC is optimized for providing core voltage, memory, and I/O voltage in processor-based systems, ensuring maximum efficiency across a wide range of load currents.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | 48-pin VQFN with thermal pad | 6.00 mm × 6.00 mm |
| Input Voltage Range (VIN) | For DCDC converters | 2.8 V to 6.3 V |
| Output Current (DCDC1, DCDC2, DCDC3) | Maximum output current per converter | Up to 1.5 A |
| Oscillator Frequency | Fixed frequency operation | 1.95 MHz to 2.55 MHz |
| Output Voltage Accuracy (PWM Mode) | DC output voltage accuracy | ±1.5% |
| LDO Output Current | Maximum output current per LDO | 200 mA |
| LDO Input Voltage Range | Input voltage range for LDOs | 1.8 V to 6.3 V |
| wLED Boost Converter | Maximum current per string | Up to 25 mA |
| I2C Interface | Interface for configuration and control | Available |
| Thermal Resistance (RθJA) | Junction-to-ambient thermal resistance | 30 °C/W |
Key Features
- Three highly efficient 2.25-MHz step-down converters with adjustable or fixed output voltage and up to 1.5 A of output current.
- Two general-purpose LDOs with fixed output voltage and dynamic voltage scaling on LDO2, each capable of 200 mA maximum output current.
- An inductive boost converter for white LED strings, supporting up to 2 × 10 LEDs with internal current sinks.
- I2C interface for configuration and control, including internal dimming for the wLED boost converter.
- 10-bit A/D converter and touch screen interface.
- Undervoltage lockout and battery fault comparator for enhanced safety.
- Power save mode at light load current for maximum efficiency.
- Thermal regulation and safety timers.
- Temperature sense input for battery pack temperature monitoring.
Applications
- Portable navigation systems.
- PDAs and pocket PCs.
- OMAP™ and low power DSP supplies.
Q & A
- What is the primary function of the TPS65070RSLR?
The TPS65070RSLR is a single-chip power management IC (PMIC) designed for portable applications, integrating a battery charger and multiple voltage regulators.
- What is the input voltage range for the DCDC converters?
The input voltage range for the DCDC converters is from 2.8 V to 6.3 V.
- How many step-down converters does the TPS65070RSLR have, and what are their output currents?
The TPS65070RSLR has three step-down converters, each capable of up to 1.5 A of output current.
- What is the maximum output current of the LDOs?
The maximum output current of each LDO is 200 mA.
- Does the TPS65070RSLR support I2C interface?
Yes, the TPS65070RSLR supports an I2C interface for configuration and control.
- What is the thermal resistance (RθJA) of the TPS65070RSLR?
The junction-to-ambient thermal resistance (RθJA) is 30 °C/W.
- What types of applications is the TPS65070RSLR suited for?
The TPS65070RSLR is suited for portable navigation systems, PDAs, pocket PCs, and OMAP™ and low power DSP supplies.
- How does the wLED boost converter operate?
The wLED boost converter supports up to 2 × 10 LEDs with internal current sinks and internal dimming using the I2C interface.
- Does the TPS65070RSLR have any safety features?
Yes, it includes undervoltage lockout, battery fault comparator, thermal regulation, and safety timers.
- What is the typical quiescent current per converter in power save mode?
The typical quiescent current per converter in power save mode is 19 µA.
