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BL2557
ON/OFF Switch
DESCRIPTION
BL2557 is a Power On/Off Switch with noise deglitch and selflock function. Deglitch time can be
customized on demand.
BL2557 is available in SOT23-6 package which greatly reducing the package size.
TYPICAL APPLICATION
PIN OUT
WJ: Product Code
YW: Date code (Year & Week)
Note: Cin=0.1uF, Cout is optional.
ORDERING INFORMATION
PART No.
PACKAGE
Tape&Reel
BL2557CB6TR
SOT23-6
3000/Reel
ELECTRICAL CHARACTERISTICS
(TA=25C)
Symbol
VDD
Iq
Rs
Td
Tdelay
Vth
Parameter
Input Voltage Range
Ground supply Current
Main switch on resistance
PIN SET switch on deglitch time
PIN SET switch off delay time
Power on/off switch logic trip voltage
Conditions
Min
Typ
2
No load, VDD=9V
No load, VDD=6V
Cset=0.1uF, VDD=6V
12
350
300
4
10
0.4
PIN DESCRIPTION
PIN #
1
2
3
4
5
6
NAME
VDD
GND
SET
POWER_ON
BAT
VOUT
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Max
DESCRIPTION
Input voltage
Gound
PIN SET switch on digitch time set & Swtch off control, active low
Switch on control, active low
Battery detect pin
Output voltage
1
Unit
V
uA
ohm
mS
uS
V
BL2557
BLOCK
VDD
VOUT
BAT
POWER_ON
SET
Control
GND
WAVEFORMS
ELECTRICAL PERFORMANCE
Load Regulation
14
12
10
Vout(V)
8
6
4
VDD=2V
VDD=5V
VDD=7V
VDD=12V
2
0
0
200
400
600
Iout(uA)
800
1000
PACKAGE OUTLINE
Package
SOT23-6
Devices per reel
Package specification：
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2
3000
Unit
mm