bd9132muv ROHM Co. Ltd., bd9132muv Datasheet - Page 6

• Manufacturer Part Number: bd9132muv
• Description: Step-down Switching Regulator
• Manufacturer: ROHM Co. Ltd.

●Description of operations
・Soft-start function
・Shutdown function
・UVLO function
V
V
OUT
EN terminal shifted to “High” activates a soft-starter to gradually establish the output voltage with the current limited during
startup, by which it is possible to prevent an overshoot of output voltage and an inrush current.
With EN terminal shifted to “Low”, the device turns to Standby Mode, and all the function blocks including reference voltage
circuit, internal oscillator and drivers are turned to OFF. Circuit current during standby is 0μF (Typ.).
Detects whether the input voltage sufficient to secure the output voltage of this IC is supplied. And the hysteresis width of
50mV (Typ.) is provided to prevent output chattering.
EN
CC
Standby mode
UVLO
Tss
Operating mode
Soft start
Fig.24 Soft start, Shutdown, UVLO timing chart
Standby
UVLO
mode
Tss
Hysteresis 50mV
Operating mode
6/15
Standby
mode
EN
Tss
Operating mode
UVLO
Standby mode