ZHCSIX0H March 2009 – October 2018 LM5008A
PRODUCTION DATA.
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NO. | NAME | ||
| 1 | SW | P | Switching node: power switching node. Connect to the output inductor, re-circulating diode, and bootstrap capacitor. |
| 2 | BST | I | Boost pin (bootstrap capacitor input): an external capacitor is required between the BST and the SW pins. A 0.01-µF ceramic capacitor is recommended. An internal diode charges the capacitor from VCC during each off-time. |
| 3 | RCL | I | Current limit off-time set pin: a resistor between this pin and RTN sets the off-time when current limit is detected. The off-time is preset to 35 µs if FB = 0 V. |
| 4 | RTN | G | Ground pin: ground for the entire circuit. |
| 5 | FB | I | Feedback input from regulated output: this pin is connected to the inverting input of the internal regulation comparator. The regulation threshold is 2.5 V. |
| 6 | RT/SD | I | On-time set pin: a resistor between this pin and VIN sets the switch on time as a function of VIN. The minimum recommended on time is 400 ns at the maximum input voltage. This pin can be used for remote shutdown. |
| 7 | VCC | P | Output from the internal high voltage series pass regulator: this regulated voltage provides gate drive power for the internal buck switch. An internal diode is provided between this pin and the BST pin. A local 0.47-µF decoupling capacitor is required. The series pass regulator is current limited to 9 mA. |
| 8 | VIN | P | Input voltage: input operating range from 6 V to 95 V. |
| — | EP | G | Exposed pad: the exposed pad has no electrical contact. Connect to system ground plane for reduced thermal resistance. (WSON package only) |