Products
LTC4412
RECOMMENDED FOR NEW DESIGNSLow Loss PowerPath™ Controller in ThinSOT
- Part Models
- 12
- 1ku List Price
- Starting From $2.06
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Overview
- 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.
| Supply Range | |
| LTC4412 | 2.5V – 28V (36V max) |
| LTC4412HV | 2.5V – 36V (40V max) |
Applications
- Cellular Phones
- Notebook and Handheld Computers
- Digital Cameras
- USB-Powered Peripherals
- Uninterruptible Power Supplies
- Logic Controlled Power Switch
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Design Note 5
Technical Articles 10
Product Selection Guide 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4412ES6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC4412ES6#TRPBF | 6-Lead TSOT-23 | ||
| LTC4412ES6#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC4412ES6#WTRPBF | 6-Lead TSOT-23 | ||
| LTC4412HS6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC4412HS6#TRPBF | 6-Lead TSOT-23 | ||
| LTC4412HS6#WTRMPBF | 6-Lead TSOT-23 | ||
| LTC4412HS6#WTRPBF | 6-Lead TSOT-23 | ||
| LTC4412IS6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC4412IS6#TRPBF | 6-Lead TSOT-23 | ||
| LTC4412MPS6#TRMPBF | 6-Lead TSOT-23 | ||
| LTC4412MPS6#TRPBF | 6-Lead TSOT-23 |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Ideal Diodes and PowerPath Controllers 2 | ||
| LTC4370 | RECOMMENDED FOR NEW DESIGNS | Two-Supply Diode-OR Current Balancing Controller |
| LTC2955 | RECOMMENDED FOR NEW DESIGNS | Pushbutton On/Off Controller with Automatic Turn-On |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
Tools & Simulations
LTspice 3
- LT8611/LTC4412 Demo Circuit - Solar Powered Battery Charger with µP Controlled MPPT (4.2-42V to 4.1V @ 1A)
- LTC4412 Demo Circuit - Automatic Switchover of Load Between a Battery and a Wall Adapter (3-28V Input)
- LTC2955 / LTC4412 / LT3009-3.3 Demo Circuit - Pushbutton On/Off Control with Automatic Turn-On When 12V Applied (12V or 3.6V Battery Backup to 3.3V @ 20mA)
Models for the following parts are available in LTspice:
- LTC4412
- LTC4412HV
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC4412/LTC4414 Demo Board | VIN1 = 2.5V to 36V/VIN2 = 5V to 36V , VOUT1 @ 2A/VOUT2 @ 8A
Resources
Reference Designs
