Features and Benefits
- Very Low Loss Replacement for Power Supply OR’ing Diodes
- 3V to 36V AC/DC Adapter Voltage Range
- –40°C to 125°C Operating Temperature Range
- Minimal External Components
- Automatic Switching Between DC Sources
- Simplifies Load Sharing with Multiple Batteries
- Low Quiescent Current: 11µA
- 2.5V to 36V 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) SOT-23 (ThinSOT™) Package
- AEC-Q100 Qualified for Automotive Applications
The LTC4412HV 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 selfheating. 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 LTC4412HVs may be interconnected to allow load sharing between multiple batteries or charging of multiple batteries from a single charger. The LTC4412HV is an extended supply and temperature range version of the LTC4412.
The wide supply operating range supports operation from one to eight 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 LTC4412HV is available in a low profile (1mm) SOT-23 package.
|LTC4412||2.5V - 28V (36V max)|
|LTC4412HV||2.5V - 36V (40V max)|
- Industrial and Automotive Applications
- Notebook and Handheld Computers
- 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
Documentation & Resources
R384 Reliability Data3/26/2018
DC1635A - Demo Manual3/23/2016
Tools & Simulations
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Models for the following parts are available in LTspice:
LTC4412HV Companion Parts
Recommended Related Parts
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.