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Analog Devices Semiconductor Electronic Components Datasheet

LTC4412HS6 Datasheet

Low Loss PowerPath Controller

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FEATURES
n Very Low Loss Replacement for Power Supply
OR’ing Diodes
n Minimal External Components
n Automatic Switching Between DC Sources
n Simplifies Load Sharing with Multiple Batteries
n Low Quiescent Current: 11µA
n 3V to 28V AC/DC Adapter Voltage Range
n 2.5V to 28V Battery Voltage Range
n Reverse Battery Protection
n Drives Almost Any Size MOSFET for Wide Range of
Current Requirements
n MOSFET Gate Protection Clamp
n Manual Control Input
n Low Profile (1mm) ThinSOT™ Package
n AEC-Q100 Qualified for Automotive Applications
APPLICATIONS
n Cellular Phones
n Notebook and Handheld Computers
n Digital Cameras
n USB-Powered Peripherals
n Uninterruptible Power Supplies
n Logic Controlled Power Switch
All registered trademarks and trademarks are the property of their respective owners.
LTC4412
Low Loss PowerPath™
Controller in ThinSOT
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 mi-
crocontroller 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.
TYPICAL APPLICATION
WALL
ADAPTER
INPUT
BATTERY
CELL(S)
LTC4412
VIN SENSE
GND GATE
CTL STAT
COUT
VCC
TO LOAD
470k STATUS OUTPUT
LOW WHEN WALL
4412 F01 ADAPTER PRESENT
Figure 1. Automatic Switchover of Load Between a Battery and a Wall Adapter
Document Feedback
For more information www.analog.com
LTC4412 vs Schottky Diode
Forward Voltage Drop
1
CONSTANT
RON
LTC4412
CONSTANT
VOLTAGE
SCHOTTKY
DIODE
0
0.02
FORWARD VOLTAGE (V)
0.5
4412 F01b
Rev. C
1


Analog Devices Semiconductor Electronic Components Datasheet

LTC4412HS6 Datasheet

Low Loss PowerPath Controller

No Preview Available !

LTC4412
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (VIN)................................... –14V to 36V
Voltage from VIN to SENSE......................... – 28V to 28V
Input Voltage
CTL.........................................................– 0.3V to 36V
SENSE..................................................... –14V to 36V
Output Voltage
GATE ...................... –0.3V to the Higher of VIN + 0.3V
or SENSE + 0.3V
STAT.......................................................– 0.3V to 36V
Operating Junction Temperature Range
(Note 2) ............................................ – 55°C to 150°C
Storage Temperature Range....................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PIN CONFIGURATION
TOP VIEW
VIN 1
GND 2
CTL 3
6 SENSE
5 GATE
4 STAT
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 150°C, θJA = 230°C/W
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
–40°C to 85°C
LTC4412IS6#TRMPBF LTC4412IS6#TRPBF
LTA2
6-Lead Plastic TSOT-23
–40°C to 85°C
LTC4412HS6#TRMPBF LTC4412HS6#TRPBF LTA2
6-Lead Plastic TSOT-23
–40°C to 150°C
LTC4412MPS6#TRMPBF LTC4412MPS6#TRPBF LTA2
6-Lead Plastic TSOT-23
–55°C to 150°C
AUTOMOTIVE PRODUCTS**
LTC4412ES6#WTRMPBF LTC4412ES6#WTRPBF LTA2
6-Lead Plastic TSOT-23
–40°C to 85°C
LTC4412HS6#WTRMPBF LTC4412HS6#WTRPBF LTA2
6-Lead Plastic TSOT-23
–40°C to 150°C
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
these models.
Rev. C
2
For more information www.analog.com


Part Number LTC4412HS6
Description Low Loss PowerPath Controller
Maker Analog Devices
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