MAX4787：50mA/100mA Current-Limit Switches _ BDTIC a Leading Distributor in China

MAX4787：50mA/100mA Current-Limit Switches

The MAX4785-MAX4788 family of switches feature internal current limiting to prevent host devices from being damaged due to faulty load conditions. These analog switches have a low 0.7Ω on-resistance and operate from a 2.3V to 5.5V input voltage range. They are available with guaranteed 50mA and 100mA current limits, making them ideal for load-switching applications. When the switch is on and a load is connected to the port, a guaranteed blanking time of 14ms ensures that the transient voltages settle down. If after this blanking time the load current is greater than the current limit, the MAX4785 and MAX4787 enter a latch-off state where the switch is turned off and active-low FLAG is issued to the microprocessor. The switch can be turned on again by cycling the power or the ON pin. The MAX4786 and MAX4788 have an autoretry feature where the switch turns off after the blanking time and then continuously checks to see if the overload condition is present. The switch remains on after the overload condition disappears. The MAX4785 and MAX4787 are available in a tiny space-saving 4-pin or 5-pin SC70 package. The MAX4786 and MAX4788 are available only in the 4-pin SC70 package. For higher current current-limiting switches, refer to the MAX4789-MAX4794 and MAX1693 data sheets.

Key Features

Guaranteed Current Limit: 50mA, 100mA
Thermal-Shutdown Protection
Reverse-Current Protection
0.7Ω On-Resistance
14ms Guaranteed Blanking Time
FLAG-bar Function (MAX4785/MAX4787)
65µA Supply Current
8µA Latch-Off Current (MAX4785/MAX4787)
0.01µA Shutdown Current
2.3V to 5.5V Supply Range
Undervoltage Lockout
Fast Current-Limit Response Time
Tiny SC70 Package

MAX4785, MAX4786, MAX4787, MAX4788: Functional Diagram

Applications/Uses

Cell Phones
Global Positioning Systems (GPS)
Handheld Devices
PDAs and Palmtop Devices

DataSheet

title	Download file
MAX4785-MAX4788 Data Sheet	MAX4785-MAX4788.pdf

Parametrics

Part Number	Power Switches	Current Limit (mA)	Current Limit (mA)	Fault Indicator	Current Limit Accuracy (%)	Current Limit Set By	R_ON (Ω)	V_SUPPLY (V)	V_SUPPLY (V)	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Power Switches	min	max	Fault Indicator	Current Limit Accuracy (%)	Current Limit Set By	typ	min	max	Oper. Temp. (°C)	Package/Pins	See Notes
MAX4785	1	50	50	Yes	41	Preset	0.7	2.3	5.5	-40 to +85	SC-70/4 SC-70/5	$1.41 @1k
MAX4786		50	50	No							SC-70/4	-
MAX4787		100	100	Yes							SC-70/4 SC-70/5	$1.41 @1k
MAX4788		100	100	No							SC-70/4	$1.70 @1k

Quality and Environmental Data

MAX4787.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4787EXK	No Longer Available	MAX4787EXK+	SC-70,;5 pin;5.3 mm²	-40°C to +85°C	No
MAX4787EXK+	Active		SC-70,;5 pin;5.3 mm²	-40°C to +85°C	Lead Free
MAX4787EXK+T	Active		SC-70,;5 pin;5.3 mm²	-40°C to +85°C	Lead Free
MAX4787EXK-T	No Longer Available	MAX4787EXK+T	SC-70,;5 pin;5.3 mm²	-40°C to +85°C	No
MAX4787EXS+	Active		SC-70,;4 pin;5.4 mm²	-40°C to +85°C	Lead Free
MAX4787EXS+T	Active		SC-70,;4 pin;5.4 mm²	-40°C to +85°C	Lead Free
MAX4787EXS-T	No Longer Available	MAX4787EXS+T	SC-70,;4 pin;5.4 mm²	-40°C to +85°C	No