In engineers‘ research and development applications, we usually need to provide the required power supply to the system, such as 3.3V, 1.8V, etc., we need to select and use a high-efficiency step-down converter. The power supply required for the design, especially when powered by a battery, requires a chip with excellent performance to provide voltage conversion. Today, Xiaobian will introduce the step-down converter TPS6256X to you.

The TPS6256x family of devices are high-efficiency synchronous buck converters optimized for battery-powered portable applications. The device can provide up to 600mA of output current when powered by, for example, a single-cell Li-Ion battery or AA or AAA batteries of other common chemistries. Its functional characteristics:

1. TPS62560 and TPS62562 are packaged in 2mm x 2mm, 6-pin SON (Small Outline No-lead) package, while TPS62561 is in 5-pin SOT (Small Outline Transistor) package, which can be chosen by engineers and friends.

2. The input voltage range of the TPS6256X chip is 2.5V to 5.5V, operating at a fixed switching frequency of 2.25MHz, the output current is up to 600mA, and it will enter the power-saving mode under light load current conditions, so as to maintain high throughout the load current range. efficiency.

3. This power saving mode is optimized for low output voltage ripple. For low noise applications, the device can be forced into fixed frequency PWM mode by pulling the MODE pin high. In shutdown mode, current consumption is reduced to less than 1µA. The TPS6256X allows the use of small inductors and capacitors to reduce solution size.

4. The chip has built-in high- and low-end MOSFETs, the output voltage accuracy in PWM mode is ±2.5%, and the typical quiescent current is 15μA; when the input is low voltage, the minimum achievable duty cycle of 100% voltage drop, soft start, and Short circuit protection, undervoltage protection, overheating protection, etc.;

Summary: The TPS6256X series DC/DC is a high-efficiency synchronous buck converter optimized for battery-powered portable applications, entering a power-saving mode at light load current conditions to maintain high efficiency over the entire load current range; Low output voltage ripple with excellent linear response and load response; built-in soft-start, and short-circuit protection, under-voltage protection, over-temperature protection, etc.; if used in personal digital assistants (PDAs), PDAs and portable media players, low Power consumption digital signal processor (DSP) power supply, point-of-load (POL) and other power supply applications, then the TPS6256X series chips will be a good choice.