bd4140hfv ROHM Co. Ltd., bd4140hfv Datasheet - Page 4

• Manufacturer Part Number: bd4140hfv
• Description: Hi-performance Regulator Ic Series For Pcs Pgood Ic For Pc
• Manufacturer: ROHM Co. Ltd.

© 2009 ROHM Co., Ltd. All rights reserved.
BD4140HFV
www.rohm.com
(PGOOD=OK)
(PGOOD=NG)
<VCC starting>
① When VCC is below the minimum operation voltage, PGOOD pin will be at H level.
② If VCC value exceeds the minimum operation voltage, by the VCC reached UVLO cancellation voltage (2.5V TYP),
③ If VCC exceeds UVLO cancellation voltage, when the input voltage of IN pin is over the detected voltage, PGOOD pin
1(0.8)
1(0.8)
PGOOD output become at L level.
will be at H level, and when the input voltage of IN pin is below the detected voltage, PGOOD pin will be at L level.
(The meaning of the minimum operation voltage is : When the starting of VCC, PGOOD output voltage become
within 10% of VCC voltage, and the value will be around 0.8VTYP(RPGOOD=100kΩ) and 1.0VTYP(RPGOOD=10kΩ).
But note that this value is reference.)
2.5
5
5
0
0
UVLO Cancellation voltage
ｔ
ｔ
ｔ
ｔ
4/8
VCC
VCC
IN
IN
GND
VCC
GND
VCC
PGOOD
PGOOD
DLY
DLY
Technical Note
2009.04 - Rev.B
R
R
PGOOD
PGOOD