BD89630EFJ(2011) 查看數據表（PDF） - ROHM Semiconductor
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BD89630EFJ Datasheet PDF : 4 Pages
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○ELECTRICAL CHARACTERISTICS
(Unless otherwise specified , Ta=25℃ VCC=5V, EN=VCC, R1=30kΩ, R2=7.5kΩ)
Parameter
Limit
Symbol
Min.
Typ.
Max.
Unit
Standby Current
Bias Current
EN Low Voltage
EN High Voltage
EN Current
Oscillation Frequency
Pch FET ON Resistance
Nch FET ON Resistance
ADJ Reference Voltage
COMP SINK Current
COMP Source Current
UVLO Threshold Voltage
UVLO Hysteresis Voltage
Soft Start Time
Timer Latch Time
ISTB
ICC
VENL
VENH
IEN
FOSC
RONP
RONN
VADJ
ICOSI
ICOSO
VUVLO1
VUVLO2
TSS
TLATCH
-
-
-
2.0
-
0.8
-
-
0.788
10
10
2.400
2.425
0.5
1
5
350
GND
VCC
1.25
1
145
80
0.800
25
25
2.500
2.550
1
2
20
600
0.3
-
10
1.2
290
160
0.812
-
-
2.600
2.700
2
4
μA
μA
V
V
μA
MHz
mΩ
mΩ
V
μA
μA
V
V
ms
ms
Output Short circuit
Threshold Voltage
VSCP
-
VOUT×0.5 VOUT×0.7
V
Condition
EN=GND
Stand-by Mode
Active Mode
VEN=5V
VCC=5V
VCC=5V
VADJ=1.0V
VADJ=0.6V
Vcc=5V→0V
Vcc=0V→5V
VOUT=1.0V→0V
○PHYSICAL DIMENSION
○BLOCK DIAGRAM・APPLICATION CIRCUIT
D89630
Lot No.
HTSOP-J8 (unit:mm)
EN 3
VCC
VREF
Gm Amp
+
Current
Comp
+
RQ
S
SLOPE CLK
OSC
VCC
Current
Sense/
Protect
+
Driver
Logic
Soft
UVLO
Start
TSD
SCP
8
1
ADJ
COMP
VCC
4
Input
5
6
SW
Output
GND
2
○ SETTING THE OUTPUT VOLTAGE
L
6
SW
Vout
R2
8
ADJ
R1
The Output Voltage is set by the external resistor divider and is calculated as：
Vout=(R2/R1+1)×VADJ ・・・ ① VADJ：ADJ pin reference Voltage (0.8V typ)
It’ s possible to adjust the output voltage by R1 and R2. (The Vout must be set from 1.0V to 2.5V.)
Resistance R1≒10kΩ is recommended. Please confirm the ripple voltage,
if you can use the resistance more than 100kΩ.
○PIN No., PIN NAME
PIN No.
1
2
3
4
5
6
7
8
PIN Name
COMP
GND
EN
VCC
SW
SW
N.C
ADJ
REV. B
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