Overview
The TPS650243RHBR is a power management IC designed by Texas Instruments for applications powered by a single Li-Ion or Li-Polymer cell. This integrated power management solution is tailored for systems that require multiple power rails, such as those found in processor-based systems, cellular and smart phones, GPS devices, digital cameras, and PDAs. The TPS650243RHBR provides a comprehensive set of power conversion and regulation features, making it an ideal choice for modern portable electronics.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VQFN (32-pin) | |
| Package Size | 5.00 mm × 5.00 mm | |
| Operating Temperature Range | -40°C to 85°C | °C |
| Input Voltage Range | 2.5 V to 6.0 V | V |
| Step-Down Converter 1 (VDCDC1) | 1.6 A, 97% Efficient | |
| Step-Down Converter 2 (VDCDC2) | 1.0 A, up to 95% Efficient | |
| Step-Down Converter 3 (VDCDC3) | 0.8 A, 90% Efficient | |
| VDCDC3 Output Voltage Options | 1.0 V / 1.2 V | V |
| LDO1 and LDO2 Current | 200 mA each | mA |
| Vdd_alive LDO Current | 30 mA | mA |
| Switching Frequency | 2.25 MHz | MHz |
| Quiescent Current | 85 μA | μA |
| Thermal Shutdown Protection | Yes |
Key Features
- Three highly efficient step-down converters for system voltage (VDCDC1), memory voltage (VDCDC2), and processor core voltage (VDCDC3)
- Dynamic voltage management for processor core with selectable output voltages
- Two general-purpose 200-mA LDO voltage regulators (LDO1 and LDO2) with externally adjustable output voltages
- A 30-mA LDO for the Vdd_alive rail, typically used in processor-based systems
- Separate enable pins for inductive converters and LDOs
- 2.25-MHz switching frequency and low quiescent current of 85 μA
- Thermal shutdown protection for enhanced reliability
- Power safe mode with PFM at light loads and PWM for higher loads; forced PWM mode option
Applications
- SPLIT-Supply DSP and μP solutions, including ARM-based processors
- Cellular and smart phones
- GPS devices
- Digital cameras
- PDA and other portable electronics
Q & A
- What is the primary function of the TPS650243RHBR?
The TPS650243RHBR is a power management IC designed to provide multiple power rails for systems powered by a single Li-Ion or Li-Polymer cell.
- What are the output currents of the step-down converters?
The step-down converters provide output currents of 1.6 A for VDCDC1, 1.0 A for VDCDC2, and 0.8 A for VDCDC3.
- How can the output voltage of VDCDC3 be set?
The output voltage of VDCDC3 can be set by connecting the DEFDCDC3 pin to either a logic HIGH or LOW level.
- What is the function of the Vdd_alive LDO?
The Vdd_alive LDO provides a 30-mA current and is typically used to power a voltage rail that is always on in a processor-based system.
- What is the switching frequency of the converters?
The switching frequency of the converters is 2.25 MHz.
- Does the TPS650243RHBR have thermal shutdown protection?
Yes, the TPS650243RHBR includes thermal shutdown protection for enhanced reliability.
- How can the operating mode of the converters be controlled?
The operating mode can be controlled using the MODE pin, which allows switching between power safe mode (PFM at light loads and PWM at higher loads) and forced PWM mode.
- What is the quiescent current of the TPS650243RHBR?
The quiescent current is 85 μA.
- What are the typical applications of the TPS650243RHBR?
Typical applications include cellular and smart phones, GPS devices, digital cameras, and PDAs.
- What is the package type and size of the TPS650243RHBR?
The TPS650243RHBR comes in a 32-pin VQFN package with a size of 5.00 mm × 5.00 mm.
