LTC4414 Linear Technology, LTC4414 Datasheet
LTC4414
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LTC4414 Summary of contents
Page 1
... This pin may also be used to indicate to a micro- controller that an auxiliary supply is connected. The con- trol (CTL) input enables the user to force the primary MOSFET off and the STAT pin low. The LTC4414 is available in a low profile 8-lead MSOP package. TO LOAD C ...
Page 2
... RATINGS PACKAGE/ORDER + 0.3V IN ORDER PART NUMBER LTC4414EMS8 LTC4414IMS8 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ● The denotes specifications which apply over the full operating = 25° ...
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... The LTC4414I is guaranteed and tested over the –40° to 125° operating temperature range. Note 3: This results in the same supply current as would be observed with an external P-channel MOSFET connected to the LTC4414 and operating in forward regulation. Note held at 12V and GATE is forced to 9V. SENSE is set at 12V IN to measure the source current at GATE ...
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... LTC4414 W U TYPICAL PERFOR A CE CHARACTERISTICS V vs Temperature and FR Supply Voltage 28V 36V – 100 TEMPERATURE (°C) 4414 G01 V and SENSE Pin Leakage IN vs Temperature – SENSE = 28V SENSE IN – SENSE – 28V VIN IN –2 – ...
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... V SENSE IN – + SOURCE A1 0.5V + ON/OFF C1 ANALOG CONTROLLER – GND 3 *DRAIN-SOURCE DIODE OF MOSFET LTC4414 www.DataSheet4U.com pin). This input is usually supplied power from and SENSE pins when an auxiliary power IN + OUTPUT TO LOAD – LINEAR GATE GATE DRIVER AND 8 VOLTAGE CLAMP V CC STAT STATUS 1 ...
Page 6
... CTL control pin is below the input low voltage of 0.35V ( only the primary supply is IL present, the Power Source Selector will power the LTC4414 from the V pin. Amplifier A1 will deliver a current to the IN Analog Controller block that is proportional to the voltage difference in the V and SENSE pins ...
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... U U APPLICATIO S I FOR ATIO Introduction The system designer will find the LTC4414 useful in a variety of cost and space sensitive power control applica- tions that include low loss diode OR’ing, fully automatic switchover from a primary to an auxiliary source of power, microcontroller controlled switchover from a primary to an auxiliary source of power, charging of multiple batter- ies from a single charger and high side power switching ...
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... This is a digital control input pin with low threshold voltages (V as 1V. During normal operation, the CTL pin can be biased at any voltage between ground and 36V, regardless of the supply voltage to the LTC4414. A logical high input on this . In this pin forces the gate to source voltage of the primary IN ...
Page 9
... Should the wall adapter input be applied, the Schottky diode will pull up the SENSE pin, connected to the load, above the battery voltage and the LTC4414 will turn the MOSFET off. The STAT pin will then sink current indicating an auxiliary input is connected. The battery is now supplying no load current and all the load current flows through the Schottky diode ...
Page 10
... LTC4414 through the CTL input. Back-to- back MOSFETs are used so that the drain-source diode will not power the load when the MOSFET is turned off (dual MOSFETs in one package are commercially available) ...
Page 11
... SENSE pin is grounded, the LTC4414 will apply maximum clamped gate drive voltage to the MOSFET. When the CTL pin is a logical high, the LTC4414 will turn off the MOSFET by pulling its gate voltage up to the supply input voltage and thus deny power to the load. The MOSFET is connected with its source connected to the power source ...
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... LTC4414 PACKAGE DESCRIPTIO 0.889 ± 0.127 (.035 ± .005) 5.23 3.20 – 3.45 (.206) (.126 – .136) MIN 0.42 ± 0.038 0.65 (.0165 ± .0015) (.0256) BSC TYP RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. ...