SMB113A/B/SMB117/A
Preliminary Information
PIN DESCRIPTION
Pin Number
Pin Type
Pin Name
Pin Description
The VM_CH3 (Channel 3 Voltage Monitor) pin connects the channel 3
step-down controller output. Internally the VM_CH3 pin connects to an
internal programmable resistor divider.
29
IN
VM_CH3
30
31
PWR
OUT
GND
Ground
The LSDRV_CH0 (Channel 0 Low-side Driver) pin is the lower switching
LSDRV_CH0 node of the channel 0 synchronous step-down buck controller. Attach to
the gate of n-channel MOSFET.
Channel 0 High Voltage Supply used to power the channel 0 buck
32
PWR
PWR
HVSUP0
driver.
Exposed metal (thermal) Pad on bottom of SMB113A/B and SMB117/A.
PAD
GND
The thermal pad of the QFN package must be connected to the PCB
GND.
Summit Microelectronics, Inc
2111 2.4 6/24/2008
7
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
