BU2050F,BU2092F,BU2092FV,BU2099FV,BD7851FP,BU2152FS
Technical Note
16/24
www.rohm.com
2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
【BD7851FP】
●Timing characteristics (Unless otherwise specified, VCC=5V, Ta=25℃)
Parameter Symbol
Limit
Unit Condition
Min. Typ. Max.
Frequency CLOCK fclk - - 10 MHz
Pulse Width CLOCK t
wh
20 50 - ns CLOCK
Pulse Width LATCH t
wh
40 50 - ns LATCH
Pulse Width ENABLE t
w
30 - - ns ENABLE
Rise Time / Fall Time t
r
/ t
f
- 30 100 ns CLOCK
Setup Time t
SU
30 50 -
ns
S_IN-CLOCK
30 50 - LATCH-CLOCK
Hold Time t
h
30 50 -
ns
S_IN-CLOCK
30 50 - LATCH-CLOCK
Rise Time t
r
- 300 -
ns
OUTn
- - 50 SOUT
Fall Time t
f
- 300 -
ns
OUTn
- - 50 SOUT
Propagation
t
pLH
- 400 650
ns
CLK-SOUT, LATCH
ENABLE-OUTn
t
pHL
- 300 400
CLK-SOUT, LATCH
ENABLE-OUTn
●Reference Current of Output Current
＊This is a data for the standard sample, not guaranteed the characteristic.
Fig. 13
●R_Iref-VOUT
＊Notes the increase of consumption current Icc, in case sets the voltage of VOUT lower. See the graph above.
Fig. 14
0
50
100
150
200
250
0.1 1 10 100
R_Iref [k
Ω
]
I
OUT
[mA]
[Condition]
Vcc=5.0V, Vo=5.0V, Ta=25℃
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1 10 100
R_Iref [k
Ω
]
V
OUT
[V]
[Condition]
Vcc=5.0V, Ta=27℃, all bit : ON
The reference current of output current is determined by the
external resistor.
(between 2pin and GND )
