Description
Pin Pin Name
Description
1
PGND The PGND pin is the high current ground pin for the lower MOSFET and drivers which should be soldered to a
large copper area to reduce thermal resistance.2
VIN
The VIN pin powers the internal control circuitry and is monitored by an undervoltage comparator.The VIN pin
is also connected to the internal power NMOS switch.It is also used in conjunction with the VSW pin to sense
current in the high side MOSFET.The VIN pin has high dI/dt edges and must be
Features
- Input Voltage Range from 4.7 V to 24 V.
- Adjustable Output Voltage.
- 1 MHz Operation (NCP3155A.
- 500 kHz).
- Internally Programmed 1.2 ms Soft.
- Start (NCP3155A.
- 2.4 ms).
- 0.8 ± 1.0% Reference Voltage.
- 48 mW HS.
- FET and 18 mW LS.
- FET.
- Current Limit Protection.
- Transconductance Amplifier with External Compensation.
- Input Undervoltage Lockout.
- Output Overvoltage and Undervolta.