| TYPE | DESCRIPTION |
|---|
| Mounting Style | Surface Mount |
| Number of Pins | 8 Pin |
| Case/Package | PowerSOIC-8 |
| Number of Outputs | 1 Output |
| Output Voltage | 0.8V ~ 58.8V |
| Output Current | 5 A |
| Switching Frequency | 100kHz ~ 2.5MHz |
| Switching Current | 7.9 A |
| Input Voltage (Max) | 42 V |
| Input Voltage (Min) | 4.5 V |
| Output Voltage (Max) | 41.1 V |
| Output Voltage (Min) | 0.8 V |
| Output Current (Max) | 5 A |
| Operating Temperature (Max) | 125 ℃ |
| Operating Temperature (Min) | -40 ℃ |
| TYPE | DESCRIPTION |
|---|
| Product Lifecycle Status | Active |
| Packaging | Tape & Reel (TR) |
| Operating Temperature | -40℃ ~ 125℃ (TA) |
The TPS54540B-Q1 device is a 42-V, 5-A, step-down regulator with an integrated high-side MOSFET. The device survives load-dump pulses up to 65 V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no load supply current to 146 µA. Shutdown supply current is reduced to 2 µA when the enable pin is pulled low.
●Undervoltage lockout is internally set at 4.3 V but can be increased using an external resistor divider at the enable pin. The output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot.
●A wide adjustable frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protect internal and external components during an overload condition.
●The TPS54540B-Q1 is available in an 8-pin thermally-enhanced HSOP PowerPAD package.
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