Power Management Switch ICs for PCs and Digital Consumer Products
1ch High Side Switch ICs
for USB Devices and Memory Cards
No.11029ECT04
BD2045AFJ, BD2055AFJ
●Description
Single channel high side switch IC for USB port is a high side switch having over current protection used in power supply line
of universal serial bus (USB).
N-channel power MOSFET of low on resistance and low supply current are realized in this IC.
And, over current detection circuit, thermal shutdown circuit, under voltage lockout and soft start circuit are built in.
●Features
1) Low on resistance 80mΩ Nch MOSFET Switch.
2) Continuous current load 0.25A
3) Control input logic
Active-Low : BD2045AFJ
Active-High : BD2055AFJ
4) Soft start circuit
5) Over current detection
6) Thermal shutdown
7) Under voltage lockout
8) Open drain error flag output
9) Reverse-current protection when power switch off
10) Power supply voltage range 2.7V to 5.5V
11) TTL Enable input
12) 1.2ms typical rise time
13) 10μA max standby current
14) Operating temperature range -40°C to 85°C
●Applications
USB hub in consumer appliances, Car accessory, PC, PC peripheral equipment, and so forth
●Lineup
Parameter
BD2045AFJ
BD2055AFJ
Continuous current load (A)
0.25
0.25
Output current at short (A)
0.5
0.5
Control input logic
Low
High
●Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Supply voltage
VIN
-0.3
to
6.0
V
Enable voltage
VEN, V/EN
-0.3
to
6.0
V
/OC voltage
V/OC
-0.3
to
6.0
V
/OC current
IS/OC
OUT voltage
VOUT
-0.3
6.0
V
Storage temperature
TSTG
-55 to 150
°C
PD
560*1
mW
Power dissipation
10
to
mA
*1 In the case of exceeding Ta = 25°C, 4.48mW should be reduced per 1°C.
* This chip is not designed to protect itself against radioactive rays.
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2011.06 - Rev.C
