JAJSLR9I February 2006 – May 2021 LM5009
PRODUCTION DATA
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
BST | 2 | I | Boost pin. An external capacitor is required between the BST and SW pins. A 0.022-µF ceramic capacitor is recommended. An internal diode charges the capacitor from VCC. |
EP | — | — | Exposed pad (WSON package only). Exposed metal pad on the underside of the device. Connecting this pad to the PC board ground plane is recommended to aid in heat dissipation. |
FB | 5 | 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. |
RCL | 3 | 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. |
RON/SD | 6 | 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 250 ns at the maximum input voltage. This pin can be used for remote shutdown. |
RTN | 4 | — | Ground pin. Ground for the entire circuit. |
SW | 1 | O | Switching output. Power switching output. Connect to the inductor, recirculating diode, and bootstrap capacitor. |
VCC | 7 | O | Output from the internal high-voltage startup regulator. Regulated at 7.0 V. If an auxiliary voltage is available to raise the voltage on this pin above the regulation set point (7 V), the internal series pass regulator shuts down, reducing the device power dissipation. Do not exceed 14 V. This voltage provides gate drive power for the internal buck switch. An internal diode is provided between this pin and the BST pin. A local 0.1-µF decoupling capacitor is required. |
VIN | 8 | I | Input voltage. Recommended operating range: 9.5 V to 95 V. |