MB3845 Fujitsu Media Devices, MB3845 Datasheet - Page 3

• Manufacturer Part Number: MB3845
• Description: Power Management 2-ch Switch IC
• Manufacturer: Fujitsu Media Devices

13/14/15
16/17/18
Pin no.
4/5/6/7
PIN DESCRIPTION
11/20
12/19
1/10
2/9
3/8
(MB3842)
(MB3845)
Symbol
GND
OUT
VIN
OC
EN
EN
SS
CS
Control signal input pin.
Set “H” to turn switch on, “L” to turn toff. At 0.8 V or less, the chip is in STBY state
and current consumption is less than 1 A.
“L” level is 1.4V (typ), “H” level is 1.6V (typ), with 200mV (typ) hysteresis.
Control signal input pin.
Set “L” to turn switch on, “H” to turn off.
At “H” level = V
1 A.
Normally used as CMOS inverter input, so that recommended use is “L” level at
GND +0.5V or less, and “H” level is V
Slow start setting pin. Used to adjust the switch on/off timing.
Add external capacitance to delay operation. Leave open when not in use.
In open mode voltages up to 12 V are present. Care should be taken in mounting
to prevent leakage current generation because high impedance is required.
Current limit setting pin.
The limit current level is set by connecting this pin to external resistance.
Switch output pin.
An UVLO (V
(typ.) or higher the OC pin voltage goes to “H” level. Also if the V
2.1 V (typ.) or lower the OC output goes to “L” state.
200mV (typ) hysteresis is provided.
Ground pin.
External notification pin.
When the switch is in on mode this pin normally outputs a “H” level signal, but
changes to “L” level when an overcurrent, overtemperature, or UVLO condition is
detected.
This is an open drain connection, and should be pulled up to high potential using
resistance.
Switching output pin.(N-ch MOSFET source)
IN
power monitor function) is provided so that when V
IN
, the chip is in STBY state and current consumption is less than
Descriptions
IN
-0.5V or greater.
MB3842/MB3845
IN
voltage drops to
IN
reaches 2.3V
3