SLVS485 is a nonsynchronous step-down controller that is ideally suited for systems powered from a 5-V or 3.3-V bus or for applications powered from a 1-cell Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or alkaline battery. This controller uses a minimum on time, minimum off time control scheme and consumes only 20-µA quiescent current to achieve highest efficiency over a wide load current range. The TPS6420x is suitable for applications such as USB powered peripherals, organizers, PDAs, handheld PCs, low power DSP supply, digital cameras, hard disk drives, and portable audio players.
The TPS6420x family are nonsynchronous step‑down controllers designed for low‑power applications such as USB peripherals, handheld devices, and battery‑powered systems. They operate from an input voltage of 1.8 V to 6.5 V and provide an adjustable output from 1.2 V up to the input voltage, with up to 95 % efficiency.
Key features include a 100 % maximum duty cycle, internal soft‑start, low quiescent current (typical 20 µA), and programmable minimum on/off times. The device is supplied in a 6‑pin SOT‑23 package and includes detailed pin assignments, functional block diagrams, electrical characteristics, and packaging information for designers.
| Adjustable output voltage | 1.2 V – VIN |
|---|---|
| Typical quiescent current | 20 µA |
| Maximum duty cycle | 100 % |
| Package type | 6‑pin SOT‑23 (DBV) |
| Operating temperature range | –40 °C to 85 °C |
| Shutdown current | 0.1 µA – 1 µA |
Typical quiescent current is 20 µA.
It is available in a 6‑pin SOT‑23 (DBV) package.
The controller can operate at a 100 % maximum duty cycle.