The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5 V to 20 V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability.
The TPS40195 buck controller operates from a 4.5 V to 20 V input and provides a selectable output voltage with tight regulation (0.591 V ±0.5%). It includes programmable undervoltage lockout (UVLO), soft‑start, thermal shutdown at 150 °C, and a power‑good signal. The device supports a switching frequency range of 100 kHz to 600 kHz and can be synchronized bi‑directionally to a master controller or external clock.
The datasheet lists ordering options (TSSOP, QFN packages), absolute maximum ratings, recommended operating conditions, and detailed electrical characteristics such as input current, output driver resistances, and protection features. Application notes cover typical usage in digital TV, servers, networking equipment, and non‑isolated DC‑DC modules.
| Input Voltage Range | 4.5 V to 20 V |
|---|---|
| Switching Frequency Range | 100 kHz to 600 kHz |
| Thermal Shutdown Temperature | 150 °C |
| Output Voltage (example setting) | 0.591 V ±0.5% |
The controller can operate with a switching frequency from 100 kHz up to 600 kHz.
Thermal shutdown is triggered at 150 °C.