IC CTRL LOWLOSS PWRPATH TSOT23-6

LTC4412IS6#TRPBF

Manufacturer Part NumberLTC4412IS6#TRPBF
DescriptionIC CTRL LOWLOSS PWRPATH TSOT23-6
ManufacturerLinear Technology
SeriesPowerPath™
LTC4412IS6#TRPBF datasheet
 


Specifications of LTC4412IS6#TRPBF

ApplicationsHandheld/Mobile DevicesFet TypeP-Channel
Number Of Outputs1Internal Switch(s)No
Delay Time - On110µsDelay Time - Off13µs
Voltage - Supply2.5 V ~ 28 VCurrent - Supply16µA
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Package / CaseTSOT-23-6, TSOT-6Lead Free Status / RoHS StatusLead free / RoHS Compliant
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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
TM
Low Profile (1mm) ThinSOT
Package
U
APPLICATIO S
Cellular Phones
Notebook and Handheld Computers
Digital Cameras
USB-Powered Peripherals
Uninterruptable Power Supplies
Logic Controlled Power Switch
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PowerPath and ThinSOT are trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
1N5819
WALL
ADAPTER
INPUT
FDN306P
BATTERY
CELL(S)
LTC4412
1
6
V
SENSE
IN
2
5
GND
GATE
3
4
CTL
STAT
Figure 1. Automatic Switchover of Load Between a Battery and a Wall Adapter
Low Loss PowerPath
Controller in ThinSOT
DESCRIPTIO
®
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 mul-
tiple 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 auto-
matically 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.
1
TO LOAD
C
OUT
V
CC
470k
STATUS OUTPUT
LOW WHEN WALL
4412 F01
ADAPTER PRESENT
0
0.02
LTC4412
TM
U
LTC4412 vs Schottky Diode
Forward Voltage Drop
CONSTANT
R
ON
LTC4412
CONSTANT
VOLTAGE
SCHOTTKY
DIODE
0.5
FORWARD VOLTAGE (V)
4412 F01b
4412fa
1

LTC4412IS6#TRPBF Summary of contents

  • Page 1

    ... Notebook and Handheld Computers ■ Digital Cameras ■ USB-Powered Peripherals ■ Uninterruptable Power Supplies ■ Logic Controlled Power Switch , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath and ThinSOT are trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO 1N5819 WALL ADAPTER INPUT FDN306P ...

  • Page 2

    ... W ORDER I FOR ATIO LEAD FREE FINISH TAPE AND REEL LTC4412ES6#PBF LTC4412ES6#TRPBF LTC4412IS6#PBF LTC4412IS6#TRPBF LEAD BASED FINISH TAPE AND REEL LTC4412ES6 LTC4412ES6#TR LTC4412IS6 LTC4412IS6#TR Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is indicated by a label on the shipping container. ...

  • Page 3

    ELECTRICAL CHARACTERISTICS temperature range, unless otherwise noted specifications are at T and current out of a pin is negative. All voltages are referenced to GND, unless otherwise specified. SYMBOL PARAMETER I Quiescent Supply Current at Low Supply QCL with CTL ...

  • Page 4

    LTC4412 W U TYPICAL PERFOR A CE CHARACTERISTICS V vs Temperature and FR Supply Voltage 2. 28V –50 – 100 TEMPERATURE (°C) 4412 G01 I vs Temperature ...

  • Page 5

    CTIO S V (Pin 1): Primary Input Supply Voltage. Supplies power IN to the internal circuitry and is one of two voltage sense inputs to the internal analog controller (The other input to the controller ...

  • Page 6

    LTC4412 U OPERATIO Operation can best be understood by referring to the Block Diagram, which illustrates the internal circuit blocks along with the few external components, and the graph that accompanies Figure 1. The terms primary and auxiliary are arbitrary ...

  • Page 7

    U U APPLICATIO S I FOR ATIO Introduction The system designer will find the LTC4412 useful in a variety of cost and space sensitive power control applica- tions that include low loss diode OR’ing, fully automatic switchover from a primary ...

  • Page 8

    LTC4412 U U APPLICATIO S I FOR ATIO V and SENSE Pin Usage IN Since the analog controller’s thresholds are small (±20mV), the V and SENSE pin connections should be made way to avoid unwanted I • ...

  • Page 9

    U TYPICAL APPLICATIO S Automatic PowerPath Control The applications shown in Figures 1, 2 and 3 are automatic ideal diode controllers that require no assistance from a microcontroller. Each of these will automatically connect the higher supply voltage, after accounting ...

  • Page 10

    LTC4412 U TYPICAL APPLICATIO S This is due to the SENSE pin voltage rising above the battery voltage and turning off the MOSFET before the Schottky diode turns on. The factors that determine the magnitude of the voltage droop are ...

  • Page 11

    ... Single Charging Source Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. High Side Power Switch Figure 7 illustrates an application circuit for a logic con- trolled high side power switch ...

  • Page 12

    ... Enables Simultaneous Battery Charging and Operation of USB Component Peripheral Devices www.linear.com ● 2.90 BSC (NOTE 4) PIN ONE ID 0.30 – 0.45 6 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S6 TSOT-23 0302 REV B LT 0607 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2002 4412fa ...