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LTC4412HS6#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P14
LTC4412
1
4412fb
For more information www.linear.com/LTC4412
Typical applicaTion
DescripTion
Low Loss PowerPath™
Controller in ThinSOT
The LT C
®
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. Tw o 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 auxiliar
y 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.
LTC4412 vs Schottky Diode
Forward Voltage Drop
FeaTures
applicaTions
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
Cellular Phones
n
Notebook and Handheld Computers
n
Digital Cameras
n
USB-Powered Peripherals
n
Uninterruptible Power Supplies
n
Logic Controlled Power Switch
Figure 1. Automatic Switchover of Load Between a Battery and a Wall Adapter
V
IN
GND
CTL
SENSE
GATE
STAT
LTC4412
C
OUT
TO LOAD
STATUS OUTPUT
LOW WHEN WALL
ADAPTER PRESENT
470k
4412 F01
V
CC
BATTERY
CELL(S)
WALL
ADAPTER
INPUT
FORWARD VOLTAGE (V)
0.02
0
CURRENT (A)
1
CONSTANT
R
ON
4412 F01b
0.5
CONSTANT
VOLTAGE
SCHOTTKY
DIODE
LTC4412
L, LT , LT C, LT M, Linear Technology and the Linear logo are registered trademarks and
PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
LTC4412
2
4412fb
For more information www.linear.com/LTC4412
pin conFiguraTionabsoluTe MaxiMuM raTings
Supply Voltage (V
IN
) .................................. –14V to 36V
Voltage from V
IN
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 V
IN
+ 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
(Note 1)
V
IN
1
GND 2
CTL 3
6 SENSE
5 GATE
4 STAT
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C, θ
JA
= 230°C/W
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4412ES6#PBF LTC4412ES6#TRPBF LTA 2 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC4412IS6#PBF LTC4412IS6#TRPBF LTA 2 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC4412HS6#PBF LTC4412HS6#TRPBF LTA 2 6-Lead Plastic TSOT-23 –40°C to 150°C
LTC4412MPS6#PBF LTC4412MPS6#TRPBF LTA 2 6-Lead Plastic TSOT-23 –55°C to 150°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4412ES6 LTC4412ES6#TR LTA 2 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC4412IS6 LTC4412IS6#TR LTA 2 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC4412HS6 LTC4412HS6#TR LTA 2 6-Lead Plastic TSOT-23 –40°C to 150°C
LTC4412MPS6 LTC4412MPS6#TR LTA 2 6-Lead Plastic TSOT-23 –55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
LTC4412
3
4412fb
For more information www.linear.com/LTC4412
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
junction temperature range, unless otherwise noted specifications are at T
A
= 25°C, V
IN
= 12V, CTL and GND = 0V. Current into a pin is
positive and current out of a pin is negative. All voltages are referenced to GND, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
,
V
SENSE
Operating Supply Range V
IN
and/or V
SENSE
Must Be in This Range
for Proper Operation
l
2.5 28 V
I
QFL
Quiescent Supply Current at Low Supply
While in Forward Regulation
V
IN
= 3.6V. Measure Combined Current
at V
IN
and SENSE Pins Averaged with
V
SENSE
= 3.5V and V
SENSE
= 3.6V (Note 3)
l
11 19 µA
I
QFH
Quiescent Supply Current at High Supply
While in Forward Regulation
V
IN
= 28V. Measure Combined Current
at V
IN
and SENSE Pins Averaged with
V
SENSE
= 27.9V and V
SENSE
= 28V (Note 3)
l
15 26 µA
I
QRL
Quiescent Supply Current at Low Supply
While in Reverse Turn-Off
V
IN
= 3.6V, V
SENSE
= 3.7V. Measure
Combined Current of V
IN
and SENSE Pins
10 19 µA
I
QRH
Quiescent Supply Current at High Supply
While in Reverse Turn-Off
V
IN
= 27.9V, V
SENSE
= 28V. Measure
Combined Current of V
IN
and SENSE Pins
16 28 µA
I
QCL
Quiescent Supply Current at Low Supply
with CTL Active
V
IN
= 3.6V, V
SENSE
= 0V, V
CTL
= 1V 7 13 µA
I
QCH
Quiescent Supply Current at High Supply
with CTL Active
V
IN
= 28V, V
SENSE
= 0V, V
CTL
= 1V 12 20 µA
I
LEAK
V
IN
and SENSE Pin Leakage Currents
When Other Pin Supplies Power
V
IN
= 28V, V
SENSE
= 0V; V
SENSE
= 28V, V
IN
= 0V
V
IN
= 14V, V
SENSE
= –14V; V
SENSE
= 14V, V
IN
= –14V
–3 0 1 µA
PowerPath Controller
V
FR
PowerPath Switch Forward Regulation
Voltage
V
IN
– V
SENSE
, 2.5V ≤ V
IN
≤ 28V
l
10 20 32 mV
V
RTO
PowerPath Switch Reverse Turn-Off
Threshold Voltage
V
SENSE
– V
IN
, 2.5V ≤ V
IN
≤ 28V
l
10 20 32 mV
GATE and S TAT Outputs
I
G(SRC)
I
G(SNK)
GATE Active Forward Regulation
Source Current
Sink Current
(Note 4)
–1
25
–2.5
50
–5
85
µA
µA
V
G(ON)
GATE Clamp Voltage Apply I
GATE
= 1µA, V
IN
= 12V,
V
SENSE
= 11.9V, Measure V
IN
– V
GATE
6.3 7 7.7 V
V
G(OFF)
GATE Off Voltage Apply I
GATE
= –5µA, V
IN
= 12V,
V
SENSE
= 12.1V, Measure V
SENSE
– V
GATE
0.13 0.25 V
t
G(ON)
GATE Turn-On Time V
GS
< –3V, C
GATE
= 1nF (Note 5) 110 175 µs
t
G(OFF)
GATE Turn-Off Time V
GS
> –1.5V, C
GATE
= 1nF (Note 6) 13 22 µs
I
S(OFF)
STAT Off Current 2.5V ≤ V
IN
≤ 28V (Note 7)
l
–1 0 1 µA
I
S(SNK)
STAT Sink Current 2.5V ≤ V
IN
≤ 28V (Note 7)
l
6 10 17 µA
t
S(ON)
STAT Turn-On Time (Note 8) 4.5 25 µs
t
S(OFF)
STAT Turn-Off Time (Note 8) 40 75 µs
CTL Input
V
IL
CTL Input Low Voltage 2.5V ≤ V
IN
≤ 28V
l
0.5 0.35 V
V
IH
CTL Input High Voltage 2.5V ≤ V
IN
≤ 28V
l
0.9 0.635 V
I
CTL
CTL Input Pull-Down Current 0.35V ≤ V
CTL
≤ 28V 1 3.5 5.5 µA
H
CTL
CTL Hysteresis 2.5V ≤ V
IN
≤ 28V 135 mV
P1-P3P4-P6P7-P9P10-P12P13-P14

LTC4412HS6#TRPBF

Mfr. #:
Buy LTC4412HS6#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Power Management Specialized - PMIC Automatic PowerPath Controller in ThinSOT
Lifecycle:
New from this manufacturer.
Delivery:
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