MAX4790：200mA/250mA/300mA Current-Limit Switches _ BDTIC a Leading Distributor in China

MAX4790：200mA/250mA/300mA Current-Limit Switches

The MAX4789–MAX4794 family of switches feature internal current limiting to prevent damage to host devices due to faulty load conditions. These analog switches have a low 0.2Ω on-resistance and operate from 2.3V to 5.5V input voltage range. They are available with guaranteed 200mA, 250mA, and 300mA current limits, making them ideal for SDIO and other 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 MAX4789, MAX4791, and MAX4793 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 MAX4790, MAX4792, and MAX4794 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 MAX4789-MAX4794 are available in 6-pin 3mm x 3mm TDFN and tiny space-saving 4-pin SOT143 packages. The MAX4789/MAX4791/MAX4793 are also available in a tiny 5-pin SOT23 package. For lower current current-limiting switches, refer to the MAX4785-MAX4788 data sheet.

Key Features

Guaranteed Current Limit: 200mA, 250mA, 300mA
Thermal-Shutdown Protection
Reverse Current Protection
0.2Ω On-Resistance
14ms Guaranteed Blanking Time
Active-Low FLAG Function (MAX4789/MAX4791/MAX4793)
80µA Supply Current
8µA Latch-Off Current (MAX4789/MAX4791/MAX4793)
0.01µA Shutdown Current
2.3V to 5.5V Supply Range
Undervoltage Lockout
Fast Current-Limit Response Time (5µs)
TDFN and SOT23/SOT143 Packages

MAX4789, MAX4790, MAX4791, MAX4792, MAX4793, MAX4794: Typical Operating Circuit

Applications/Uses

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

DataSheet

title	Download file
MAX4789-MAX4794 Data Sheet	MAX4789-MAX4794.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
MAX4789	1	200	200	Yes	20	Preset	0.2	2.3	5.5	-40 to +85	SOT/4 SOT/5 TDFN-EP/6	$1.44 @1k
MAX4790		200	200	No						-40 to +85	SOT/4 TDFN-EP/6	$1.20 @1k
MAX4791		250	250	Yes						-40 to +85 -40 to +105	SOT/4 SOT/5 TDFN-EP/6	-
MAX4793		300	300	Yes						-40 to +85	SOT/4 SOT/5 TDFN-EP/6	$1.44 @1k
MAX4794		300	300	No						-40 to +85	SOT/4 TDFN-EP/6	$1.20 @1k

Quality and Environmental Data

MAX4790.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4790ETT-T	No Longer Available		TDFN-EP,;6 pin;9.6 mm²	-40°C to +85°C	No
MAX4790EUS+	Active		SOT,;4 pin;8 mm²	-40°C to +85°C	Lead Free
MAX4790EUS+T	Active		SOT,;4 pin;8 mm²	-40°C to +85°C	Lead Free
MAX4790EUS-T	No Longer Available	MAX4790EUS+T	SOT,;4 pin;8 mm²	-40°C to +85°C	No