Features and Benefits
- Very Low Loss Replacement for Power Supply OR’ing Diodes
- Minimal External Components
- Automatic Switching Between DC Sources
- Simplifies Load Sharing with Multiple Batteries
- Low Quiescent Current: 11μA
- 3V to 28V AC/DC Adapter Voltage Range
- 2.5V to 28V Battery Voltage Range
- Reverse Battery Protection
- Drives Almost Any Size MOSFET for Wide Range of Current Requirements
- MOSFET Gate Protection Clamp
- Manual Control Input
- Low Profile (1mm) ThinSOT™ Package
- AEC-Q100 Qualified for Automotive Applications
The LTC4412 controls an external P-channel MOSFET to create a near ideal diode function for power switchover or load sharing. This permits highly efficient OR’ing of multiple power sources for extended battery life and low self-heating. When conducting, the voltage drop across the MOSFET is typically 20mV. For applications with a wall adapter or other auxiliary power source, the load is automatically disconnected from the battery when the auxiliary source is connected. Two or more LTC4412s may be interconnected to allow load sharing between multiple batteries or charging of multiple batteries from a single charger.
The wide supply operating range supports operation from one to six Li-Ion cells in series. The low quiescent current (11μA typical) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.
The STAT pin can be used to enable an auxiliary P-channel MOSFET power switch when an auxiliary supply is detected. This pin may also be used to indicate to a microcontroller that an auxiliary supply is connected. The control (CTL) input enables the user to force the primary MOSFET off and the STAT pin low.
The LTC4412 is available in a low profile (1mm) ThinSOT package.
|LTC4412||2.5V – 28V (36V max)|
|LTC4412HV||2.5V – 36V (40V max)|
- Cellular Phones
- Notebook and Handheld Computers
- Digital Cameras
- USB-Powered Peripherals
- Uninterruptible Power Supplies
- Logic Controlled Power Switch
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
DC1635A Demo Board for:
LTC4412HV 36V, Low Loss PowerPath Controller in ThinSOT
LTC4414 36V, Low Loss PowerPath Controller for Large PFETs
LTC4412 Low Loss PowerPath Controller in ThinSOT
Design Notes (5)
Tools & Simulations
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Reference Designs (1)
Altera Cyclone IV GX Transceiver Starter Kit
Altera Cyclone IV GX Transceiver Starter Kit
Features & Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Product Selection Guide (1)
Technical Articles (10)
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