Overview
The TPS62220DDCR from Texas Instruments is a high-efficiency, synchronous step-down converter designed for use in portable systems. This device is part of the TPS6222x family, which is ideally suited for systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries, as well as standard 3.3-V or 5-V voltage rails. The TPS62220 offers adjustable output voltage from 0.7 V to the input voltage, with a maximum output current of 400 mA. It operates at a fixed switching frequency of 1.25 MHz and features a power-save mode that reduces the switching frequency and quiescent current to 15 µA at light load currents, ensuring high efficiency across the entire load current range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 to 6 | V |
| Output Voltage Range | 0.7 to VI | V |
| Output Current | Up to 400 | mA |
| Switching Frequency | 1.25 MHz | |
| Quiescent Current | 15 µA (typical) | |
| Package | TSOT23 | |
| Operating Junction Temperature Range | -40 to 150 | °C |
| Storage Temperature Range | -65 to 150 | °C |
Key Features
- High-efficiency synchronous step-down converter with up to 95% efficiency
- Adjustable output voltage range from 0.7 V to VI
- Fixed output voltage options available
- Soft start and 100% duty cycle low-dropout operation
- Dynamic output-voltage positioning
- Power-save mode for high efficiency at light load currents
- Advanced fast response voltage mode control scheme for superior line and load regulation
- Minimal external components required (three small components)
Applications
- PDAs and Pocket PCs
- Cellular Phones and Smart Phones
- OMAP™ and Low Power DSP Supply
- Digital Cameras
- Portable Media Players
- Portable Equipment
- WLAN PC Cards
Q & A
- What is the input voltage range of the TPS62220DDCR?
The input voltage range is from 2.5 V to 6 V.
- What is the maximum output current of the TPS62220DDCR?
The maximum output current is up to 400 mA.
- What is the typical quiescent current of the TPS62220DDCR?
The typical quiescent current is 15 µA.
- What is the switching frequency of the TPS62220DDCR?
The switching frequency is typically 1.25 MHz.
- What is the package type of the TPS62220DDCR?
The package type is TSOT23.
- What are the key applications of the TPS62220DDCR?
The key applications include PDAs, cellular phones, smart phones, OMAP™ and low power DSP supply, digital cameras, portable media players, portable equipment, and WLAN PC cards.
- Does the TPS62220DDCR support adjustable output voltage?
- What is the power-save mode operation of the TPS62220DDCR?
In power-save mode, the switching frequency is reduced, and the quiescent current is typically only 15 µA, ensuring high efficiency at light load currents.
- What are the benefits of the advanced fast response voltage mode control scheme in the TPS62220DDCR?
The advanced fast response voltage mode control scheme achieves superior line and load regulation with small ceramic input and output capacitors.
- How many external components are required for the TPS62220DDCR?
The TPS62220DDCR requires only three small external components.
