The TPS40192/3 are cost-optimized synchronous buck controllers that operate from 4.5 V to 18 V input. These controllers implement a voltage-mode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193). The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact power-supply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through.
The TPS40192 and TPS40193 are 10‑pin SON package synchronous buck controllers that operate from a 4.5 V to 18 V input voltage range and deliver up to 20 A output current. They feature an internal 5‑V regulator, thermal shutdown protection at 145 °C, and selectable switching frequencies of 600 kHz (TPS40192) or 300 kHz (TPS40193). The devices include short‑circuit detection, soft‑start control, and power‑good monitoring.
The datasheet details device ratings, electrical characteristics, typical performance curves, and mechanical data for the exposed thermal pad. Ordering information, package dimensions, and application examples such as cable‑modem CPE, graphics/audio cards, and entry‑level servers are also provided.
| Input voltage range | 4.5 V to 18 V |
|---|---|
| Maximum output current | 20 A |
| Internal regulator voltage | 5 V |
| Soft‑start time | 3 µs to 6 µs |
| UVLO turn‑on voltage | 3.9 V to 4.4 V |
| Power‑good threshold voltage | 650 mV |
The devices operate from 4.5 V up to 18 V input voltage.
Short‑circuit detection senses the voltage drop across the low‑side MOSFET and uses an external resistor to set a threshold of 100 mV, 200 mV, or 280 mV.