LTC4412 - Low Loss PowerPath Controller in ThinSOT
Features
- 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
Typical Application
Description
The LTC®4412 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) |
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC4412ES6#PBF | SOT-23 | S6 | E | 05-08-1636 | Yes |
| LTC4412ES6#TRMPBF | SOT-23 | S6 | E | 05-08-1636 | Yes |
| LTC4412ES6#TRPBF | SOT-23 | S6 | E | 05-08-1636 | Yes |
| LTC4412HS6#PBF | SOT-23 | S6 | H | 05-08-1636 | Yes |
| LTC4412HS6#TRMPBF | SOT-23 | S6 | H | 05-08-1636 | Yes |
| LTC4412HS6#TRPBF | SOT-23 | S6 | H | 05-08-1636 | Yes |
| LTC4412IS6#PBF | SOT-23 | S6 | I | 05-08-1636 | Yes |
| LTC4412IS6#TRMPBF | SOT-23 | S6 | I | 05-08-1636 | Yes |
| LTC4412IS6#TRPBF | SOT-23 | S6 | I | 05-08-1636 | Yes |
| LTC4412MPS6 | SOT-23 | S6 | MP | 05-08-1636 | No |
| LTC4412MPS6#PBF | SOT-23 | S6 | MP | 05-08-1636 | Yes |
| LTC4412MPS6#TR | SOT-23 | S6 | MP | 05-08-1636 | No |
| LTC4412MPS6#TRMPBF | SOT-23 | S6 | MP | 05-08-1636 | Yes |
| LTC4412MPS6#TRPBF | SOT-23 | S6 | MP | 05-08-1636 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC4412ES6#PBF | SOT-23 | E | $1.93 | Yes | ||
| LTC4412ES6#TRMPBF | SOT-23 | E | $1.93 | $1.38 | Yes | |
| LTC4412ES6#TRPBF | SOT-23 | E | $1.93 | $1.36 | Yes | |
| LTC4412HS6#PBF | SOT-23 | H | $2.64 | Yes | ||
| LTC4412HS6#TRMPBF | SOT-23 | H | $2.64 | $1.90 | Yes | |
| LTC4412HS6#TRPBF | SOT-23 | H | $2.64 | $1.85 | Yes | |
| LTC4412IS6#PBF | SOT-23 | I | $2.09 | Yes | ||
| LTC4412IS6#TRMPBF | SOT-23 | I | $2.09 | $1.51 | Yes | |
| LTC4412IS6#TRPBF | SOT-23 | I | $2.09 | $1.46 | Yes | |
| LTC4412MPS6 | SOT-23 | MP | $5.22 | No | ||
| LTC4412MPS6#PBF | SOT-23 | MP | $5.22 | Yes | ||
| LTC4412MPS6#TR | SOT-23 | MP | $5.22 | $3.65 | No | |
| LTC4412MPS6#TRMPBF | SOT-23 | MP | $5.22 | $3.70 | Yes | |
| LTC4412MPS6#TRPBF | SOT-23 | MP | $5.22 | $3.65 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1635A | LTC4412 / LTC4414 Demo Board u VIN1=2.5V to 36V / VIN2= 5V to 36V , V OUT1 @ 2A / V OUT2 @ 8A | $75.00 | |
| Buy Now | |||
Applications
- Cellular Phones
- Notebook and Handheld Computers
- Digital Cameras
- USB-Powered Peripherals
- Uninterruptible Power Supplies
- Logic Controlled Power Switch
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LTC4412
LTC4412HV
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
