ZHCSJB2 January 2019 TPS54540B
PRODUCTION DATA.
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | ||
|---|---|---|---|---|---|---|---|
| SUPPLY VOLTAGE (VIN PIN) | |||||||
| Operating input voltage | 4.5 | 42 | V | ||||
| Internal undervoltage lockout threshold | Rising | 4.1 | 4.3 | 4.48 | V | ||
| Internal undervoltage lockout threshold hysteresis | 325 | mV | |||||
| Shutdown supply current | EN = 0 V, 25°C, 4.5 V ≤ VIN ≤ 42 V | 2.25 | 4.5 | μA | |||
| Operating: nonswitching supply current | FB = 0.9 V, TA = 25°C | 146 | 175 | ||||
| ENABLE AND UVLO (EN PIN) | |||||||
| Enable threshold voltage | No voltage hysteresis, rising and falling | 1.1 | 1.2 | 1.3 | V | ||
| Input current | Enable threshold +50 mV | –4.6 | μA | ||||
| Enable threshold –50 mV | –0.58 | –1.2 | -1.8 | ||||
| Hysteresis current | –2.2 | –3.4 | -4.5 | μA | |||
| VOLTAGE REFERENCE | |||||||
| Voltage reference | 0.792 | 0.8 | 0.808 | V | |||
| HIGH-SIDE MOSFET | |||||||
| On-resistance | VIN = 12 V, BOOT-SW = 6 V | 92 | 190 | mΩ | |||
| ERROR AMPLIFIER | |||||||
| Input current | 50 | nA | |||||
| Error amplifier dc gain | VFB = 0.8 V | 10,000 | V/V | ||||
| Min unity gain bandwidth | 2500 | kHz | |||||
| Error amplifier source/sink | V(COMP) = 1 V, 100 mV overdrive | ±30 | μA | ||||
| COMP to SW current transconductance | 17 | A/V | |||||
| CURRENT LIMIT | |||||||
| Current limit test | All VIN and temperatures, open loop(1) | 6.3 | 7.9 | 9.5 | A | ||
| All temperatures, VIN = 12 V, open loop(1) | 6.3 | 7.9 | 9.5 | ||||
| VIN = 12 V, TA = 25°C, Open Loop(1) | 7 | 7.9 | 8.8 | ||||
| THERMAL SHUTDOWN | |||||||
| Thermal shutdown | 176 | °C | |||||
| Thermal shutdown hysteresis | 12 | °C | |||||
| TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN) | |||||||
| Switching frequency range using RT mode | 100 | 2500 | kHz | ||||
| fSW | Switching frequency | RT = 200 kΩ | 450 | 500 | 550 | kHz | |
| Switching frequency range using CLK mode | 160 | 2300 | kHz | ||||
| RT/CLK high threshold | 1.55 | 2 | V | ||||
| RT/CLK low threshold | 0.5 | 1.2 | V | ||||