DC1635A Analog Devices

LTC4412 Low Loss PowerPath Controller in ThinSOT FEATURES DESCRIPTION n Very Low Loss Replacement for Power Supply The LTC 4412 controls an external P-channel MOSFET to create a near ideal diode function for power switchover ORing Diodes n or load sharing. This permits highly efficient ORing of Minimal External Components n multiple power sources for extended battery life and low Automatic Switching Between DC Sources n self-heating. When conducting, the voltage drop across Simplifies Load Sharing with Multiple Batteries n the MOSFET is typically 20mV. For applications with a Low Quiescent Current: 11A wall adapter or other auxiliary power source, the load is n 3V to 28V AC/DC Adapter Voltage Range automatically disconnected from the battery when the n 2.5V to 28V Battery Voltage Range auxiliary source is connected. Two or more LTC4412s n Reverse Battery Protection may be interconnected to allow load sharing between n Drives Almost Any Size MOSFET for Wide Range of multiple batteries or charging of multiple batteries from Current Requirements a single charger. n MOSFET Gate Protection Clamp n Manual Control Input The wide supply operating range supports operation n Low Profile (1mm) ThinSOT Package from one to six Li-Ion cells in series. The low quiescent n AEC-Q100 Qualified for Automotive Applications current (11A typical) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection. APPLICATIONS The STAT pin can be used to enable an auxiliary P-channel n Cellular Phones MOSFET power switch when an auxiliary supply is n Notebook and Handheld Computers detected. This pin may also be used to indicate to a mi- n Digital Cameras crocontroller that an auxiliary supply is connected. The n USB-Powered Peripherals control (CTL) input enables the user to force the primary n Uninterruptible Power Supplies MOSFET off and the STAT pin low. n Logic Controlled Power Switch The LTC4412 is available in a low profile (1mm) ThinSOT All registered trademarks and trademarks are the property of their respective owners. package. TYPICAL APPLICATION LTC4412 vs Schottky Diode Forward Voltage Drop 1 WALL CONSTANT ADAPTER R ON INPUT TO LOAD BATTERY C OUT CELL(S) LTC4412 LTC4412 V CC V SENSE IN GND GATE 470k CONSTANT STATUS OUTPUT VOLTAGE CTL STAT LOW WHEN WALL SCHOTTKY 4412 F01 ADAPTER PRESENT DIODE Figure 1. Automatic Switchover of Load Between a Battery and a Wall Adapter 0 0.02 0.5 FORWARD VOLTAGE (V) 4412 F01b Rev. C 1 Document Feedback For more information www.analog.com CURRENT (A)LTC4412 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage (V ) .................................. 14V to 36V IN Voltage from V to SENSE ........................ 28V to 28V IN TOP VIEW Input Voltage V 1 6 SENSE IN CTL ........................................................0.3V to 36V GND 2 5 GATE SENSE .................................................... 14V to 36V CTL 3 4 STAT Output Voltage S6 PACKAGE GATE ..................... 0.3V to the Higher of V + 0.3V 6-LEAD PLASTIC TSOT-23 IN or SENSE + 0.3V T = 150C, = 230C/W JMAX JA STAT ......................................................0.3V to 36V Operating Junction Temperature Range (Note 2) ........................................... 55C to 150C Storage Temperature Range ...................65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C ORDER INFORMATION TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4412ES6 TRMPBF LTC4412ES6 TRPBF LTA2 6-Lead Plastic TSOT-23 40C to 85C LTC4412IS6 TRMPBF LTC4412IS6 TRPBF LTA2 6-Lead Plastic TSOT-23 40C to 85C LTC4412HS6 TRMPBF LTC4412HS6 TRPBF LTA2 6-Lead Plastic TSOT-23 40C to 150C LTC4412MPS6 TRMPBF LTC4412MPS6 TRPBF LTA2 6-Lead Plastic TSOT-23 55C to 150C AUTOMOTIVE PRODUCTS** LTC4412ES6 WTRMPBF LTC4412ES6 WTRPBF LTA2 6-Lead Plastic TSOT-23 40C to 85C LTC4412HS6 WTRMPBF LTC4412HS6 WTRPBF LTA2 6-Lead Plastic TSOT-23 40C to 150C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. **Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for thesemodels. Rev. C 2 For more information www.analog.com