Fujitsu manual Pin Description, MB3842/MB3845, Pin no, Symbol, Descriptions

MB3842/MB3845

■PIN DESCRIPTION

Pin no.	Symbol		Descriptions
			Control signal input pin.
		EN	Set “H” to turn switch on, “L” to turn toff. At 0.8 V or less, the chip is in STBY state
	(MB3842)		and current consumption is less than 1∝A.
			“L” level is 1.4V (typ), “H” level is 1.6V (typ), with 200mV (typ) hysteresis.
1/10			Control signal input pin.
			Set “L” to turn switch on, “H” to turn off.
		EN	At “H” level = V IN, the chip is in STBY state and current consumption is less than
	(MB3845)		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 IN -0.5V or greater.
			Slow start setting pin. Used to adjust the switch on/off timing.
2/9		SS	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.
3/8		CS	Current limit setting pin.
			The limit current level is set by connecting this pin to external resistance.
			Switch output pin.
4/5/6/7	VIN		An UVLO (VIN power monitor function) is provided so that when VIN reaches 2.3V
			(typ.) or higher the OC pin voltage goes to “H” level. Also if the V IN voltage drops to
			2.1 V (typ.) or lower the OC output goes to “L” state.
			200mV (typ) hysteresis is provided.
11/20	GND		Ground pin.
			External notification pin.
			When the switch is in on mode this pin normally outputs a “H” level signal, but
12/19	OC		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.
13/14/15	OUT		Switching output pin.(N-ch MOSFET source)
16/17/18

3