The TPS4030x is a family of cost-optimized synchronous buck controllers that operate from 3-V to 20-V input. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to input voltage change. The switching frequency is fixed at 300 KHz, 600 KHz or 1.2 MHz. Frequency Spread Spectrum feature adds dither to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards. The TPS4030x has good EMI performance and can be used in various applications such as POL modules, printers, digital TVs and telecommunications.
The TPS4030x series (TPS40303, TPS40304, TPS40305) are cost‑optimized synchronous buck controllers that operate from 3 V to 20 V input. They use a voltage‑mode control architecture with input‑voltage feed‑forward compensation and offer programmable soft‑start, over‑current protection and loop compensation.
Key features include selectable switching frequencies (300 kHz, 600 kHz or 1.2 MHz), a 10‑pin SON package with a thermal pad, frequency spread‑spectrum operation for EMI reduction, and built‑in thermal shutdown at 145 °C. The datasheet provides electrical characteristics, absolute maximum ratings, recommended operating conditions, and detailed pin functions for board designers.
| Input voltage range | 3 V to 20 V |
|---|---|
| Switching frequency (TPS40303) | 300 kHz |
| Switching frequency (TPS40304) | 600 kHz |
| Switching frequency (TPS40305) | 1.2 MHz |
| Package | 10‑Pin 3 mm × 3 mm SON (DRC) |
| Reference voltage | 600 mV (1 % tolerance) |
| Thermal shutdown temperature | 145 °C |
| ESD protection (HBM) | 2000 V |
The devices operate with an input voltage from 3 V up to 20 V.
TPS40303 runs at 300 kHz, TPS40304 at 600 kHz, and TPS40305 at 1.2 MHz.
They are supplied in a 10‑pin 3 mm × 3 mm SON (DRC) package with a thermal pad that serves as a ground connection.
Thermal shutdown is triggered at 145 °C junction temperature.