BD8964FVM(2009) 查看數據表（PDF） - ROHM Semiconductor
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BD8964FVM
(Rev.:2009)
(Rev.:2009)
ROHM Semiconductor
BD8964FVM Datasheet PDF : 14 Pages
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BD8964FVM
Technical Note
●Electrical Characteristics
◎ (Ta=25℃, VCC=5V, EN=VCC, R1=20kΩ, R2=10kΩ unless otherwise specified.)
Parameter
Symbol
Min.
Typ.
Max.
Standby current
ISTB
-
0
10
Bias current
ICC
-
250
450
EN Low voltage
VENL
-
GND
0.8
EN High voltage
VENH
2.0
VCC
-
EN input current
IEN
-
1
10
Oscillation frequency
FOSC
0.8
1
1.2
Pch FET ON resistance
RONP
-
350
600
Nch FET ON resistance
RONN
-
250
500
ADJ voltage
VADJ
0.78
0.80
0.82
ITH SInk current
ITHSI
10
20
-
ITH Source Current
ITHSO
10
20
-
UVLO threshold voltage
VUVLO1
3.6
3.8
4.0
UVLO release voltage
VUVLO2
3.65
3.90
4.2
Soft start time
TSS
0.5
1
2
Timer latch time
TLATCH
1
2
3
Unit
μA
μA
V
V
μA
MHz
mΩ
mΩ
V
μA
μA
V
V
ms
ms
Conditions
EN=GND
Standby mode
Active mode
VEN=5V
PVCC=5V
PVCC=5V
VADJ=H
VADJ=L
VCC=4→0V
VCC=0→4V
VADJ=H
SCP/TSD operated
●Block Diagram, Application Circuit
2.9±0.1
Max3.25(include.BURR)
85
D8 9
64
4 +6
-4
1
0.475
4 Lot No.
1PIN MARK
0.145
+0.05
-0.03
S
0.22
+0.05
-0.04
VCC
EN
3
VREF
Current
Comp.
RQ
Gm Amp.
S
SLOPE
CLK
VCC OSC
Soft
Start
UVLO
TSD
Current
Sense/
Protect
+
Driver
Logic
VCC
8
7
Input
PVCC
6
SW
Output
5
PGND
4
GND
0.65 0.08 S
1
ADJ
2
ITH
Fig.1 BD8964FVM View
●Pin No. & function table
Pin No.
1
2
3
4
5
6
7
8
Pin name
ADJ
ITH
EN
GND
PGND
SW
PVCC
VCC
Fig.2 BD8964FVM Block Diagram
PIN function
Output voltage detect pin
GmAmp output pin/Connected phase compensation capacitor
Enable pin(Active High)
Ground
Nch FET source pin
Pch/Nch FET drain output pin
Pch FET source pin
VCC power supply input pin
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© 2009 ROHM Co., Ltd. All rights reserved.
2/13
2009.05 - Rev.A
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