LTC4414IMS8#TRPBF

1
LTC4414
4414fc
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
FORWARD VOLTAGE (V)
0.02
0
CURRENT (A)
8.0
3.6
CONSTANT
R
ON
4414 TA01b
0.5
CONSTANT
VOLTAGE
SCHOTTKY
DIODE
LTC4414
V
IN
GND
CTL
NC
SENSE
GATE
STAT
NC
LTC4414
C
OUT
TO LOAD
STATUS OUTPUT
LOW WHEN POWER
SUPPLY PRESENT
470k
4414 TA01
V
CC
UPS840
SUP75P03_07
BATTERY
CELL(S)
POWER
SUPPLY
INPUT
Automatic Switchover of Load Between a Battery and a Power Supply
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
36V, Low Loss PowerPath
TM
Controller for Large PFETs
Designed Specifically to Drive Large Q
G
PFETs
Very Low Loss Replacement for Power Supply
OR’ing Diodes
3.5V to 36V AC/DC Adapter Voltage Range
Minimal External Components
Automatic Switching Between DC Sources
Low Quiescent Current: 30µA
3V to 36V Battery Voltage Range
Limited Reverse Battery Protection
MOSFET Gate Protection Clamp
Manual Control Input
Space Saving 8-Lead MSOP Package
High Current Power Path Switch
Industrial and Automotive Applications
Uninterruptable Power Supplies
Logic Controlled Power Switch
Battery Backup Systems
Emergency Systems with Battery Backups
The LTC
®
4414 controls an external P-channel MOSFET to
create a near ideal diode function for power switchover.
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 typi-
cally 20mV. For applications with a wall adapter or other aux-
iliary power source, the load is automatically disconnected
from the battery when the auxiliary source is connected.
Two or more LTC4414s may be interconnected to allow
switchover between multiple batteries or charging of mul-
tiple batteries from a single charger.
The wide supply operating range supports operation from
one to eight Li-Ion cells in series. The low quiescent
current (30µA 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 micro-
controller that an auxiliary supply is connected. The con-
trol (CTL) input enables the user to force the primary
MOSFET off and the STAT pin low.
The LTC4414 is available in a low profile 8-lead MSOP
package.
LTC4414 vs Schottky Diode Forward Voltage Drop
2
LTC4414
4414fc
(Note 1)
Supply Voltage (V
IN
) .................................. 14V to 40V
Voltage from V
IN
to SENSE ........................40V to 40V
Input Voltage
CTL ........................................................ 0.3V to 40V
SENSE .................................................... 14V to 40V
Output Voltage
GATE ..................... 0.3V to the Higher of V
IN
+ 0.3V
or SENSE + 0.3V
STAT .....................................................0.3V to 40V
Operating Ambient Temperature Range (Note 2)
I Grade ............................................ 40°C to 125°C
E Grade.............................................. 40°C to 85°C
Operating Junction Temperature ......... 40°C to 125°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
The denotes specifications which apply over the full operating
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.
ELECTRICAL CHARACTERISTICS
1
2
3
4
STAT
CTL
GND
NC
8
7
6
5
GATE
V
IN
SENSE
NC
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 200°C/W
ORDER PART NUMBER
MS8 PART MARKING
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC4414EMS8
LTC4414IMS8
LTBQF
LTBQG
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
, Operating Supply Range V
IN
and/or V
SENSE
Must Be in This Range 336V
V
SENSE
for Proper Operation
I
QFL
Quiescent Supply Current at Low Supply V
IN
= 3.6V. Measure Combined Current 31 60 µA
While in Forward Regulation at V
IN
and SENSE Pins Averaged with
V
SENSE
= 3.5V and V
SENSE
= 3.6V (Note 3)
I
QFH
Quiescent Supply Current at High Supply V
IN
= 36V. Measure Combined Current 36 61 µA
While in Forward Regulation at V
IN
and SENSE Pins Averaged with
V
SENSE
= 35.9V and V
SENSE
= 36V (Note 3)
I
QRL
Quiescent Supply Current at Low Supply V
IN
= 3.6V, V
SENSE
= 3.7V. Measure 21 30 µA
While in Reverse Turn-Off Combined Current of V
IN
and SENSE Pins
I
QRH
Quiescent Supply Current at High Supply V
IN
= 35.9V, V
SENSE
= 36V. Measure 33 45 µA
While in Reverse Turn-Off Combined Current of V
IN
and SENSE Pins
I
QCL
Quiescent Supply Current at Low Supply V
IN
= 3.6V, V
CTL
= 1V, 14 20 µA
with CTL Active V
IN
– V
SENSE
= 0.9V
I
QCH
Quiescent Supply Current at High Supply V
IN
= 36V, V
CTL
= 1V, 26 35 µA
with CTL Active V
IN
– V
SENSE
= 0.9V
I
LEAK
V
IN
and SENSE Pin Leakage Currents V
IN
= 28V, SENSE = 0V –10 –1 1 µA
When Other Pin Supplies Power V
IN
= 14V, SENSE = –14V –10 1 µA
V
IN
= 36V, SENSE = 8V –10 1 µA
V
IN
= 0V, SENSE = 28V –10 1 µA
V
IN
= –14V, SENSE = 14V –10 1 µA
V
IN
= 8V, SENSE = 36V –10 1 µA
PowerPath Controller
V
FR
PowerPath Switch Forward Regulation V
IN
– V
SENSE
, 3V V
IN
36V, C
GATE
= 3nF 10 32 mV
Voltage
V
RTO
PowerPath Switch Reverse Turn-Off V
SENSE
– V
IN
, 3V V
IN
36V, C
GATE
= 3nF 10 32 mV
Threshold Voltage
3
LTC4414
4414fc
The denotes specifications which apply over the full operating
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.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4414E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC4414I is guaranteed and tested
over the –40° to 125° operating temperature range.
Note 3: This results in the same supply current as would be observed with
an external P-channel MOSFET connected to the LTC4414 and operating in
forward regulation.
Note 4: V
IN
is held at 12V and GATE is forced to 9V. SENSE is set at 12V
to measure the source current at GATE. SENSE is set at 11.9V to measure
sink current at GATE.
Note 5: V
IN
is held at 12V and SENSE is stepped from 12.2V to 11.8V to
trigger the event. GATE voltage is initially V
G(OFF)
.
Note 6: V
IN
is held at 12V and SENSE is stepped from 11.8V to 12.2V to
trigger the event. GATE voltage is initially internally clamped at V
G(ON)
.
Note 7: STAT is forced to V
IN
– 1.5V. SENSE is set at V
IN
– 0.1V to
measure the off current at STAT. SENSE is set V
IN
+ 0.1V to measure the
sink current at STAT.
Note 8: STAT is forced to 9V and V
IN
is held at 12V. SENSE is stepped
from 11.8V to 12.2V to measure the STAT turn-on time defined when I
STAT
reaches one half the measured I
S(SNK).
SENSE is stepped from 12.2V to
11.8V to measure the STAT turn-off time defined when I
STAT
reaches one
half the measured I
S(SNK) .
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
GATE and STAT Outputs
GATE Active Forward Regulation (Note 4)
I
G(SRC)
Source Current –25 –7 µA
I
G(SNK)
Sink Current 190 500 µA
V
G(ON)
GATE Clamp Voltage Apply I
GATE
= 6µA, V
IN
= 12V, 8 9 V
V
SENSE
= 11.9V, Measure V
IN
– V
GATE
V
G(OFF)
GATE Off Voltage Apply I
GATE
= –30µA, V
IN
= 12V, 0.35 0.92 V
V
SENSE
= 12.1V, Measure V
SENSE
– V
GATE
t
G(ON)
GATE Turn-On Time V
GS
< –6V, C
GATE
= 17nF (Note 5) 600 µs
t
G(OFF)
GATE Turn-Off Time V
GS
> –1.5V, C
GATE
= 17nF (Note 6) 20 µs
I
S(OFF)
STAT Off Current 3V V
IN
36V (Note 7) –1 0 1 µA
I
S(SNK)
STAT Sink Current 12V V
IN
36V (Note 7) 50 200 µA
t
S(ON)
STAT Turn-On Time (Note 8) 8 µs
t
S(OFF)
STAT Turn-Off Time (Note 8) 51 µs
CTL Input
V
IL
CTL Input Low Voltage 3V V
IN
36V 0.35 V
V
IH
CTL Input High Voltage 3V V
IN
36V 0.9 V
I
CTL
CTL Input Pull-Down Current 0.35V V
CTL
36V 1 3.5 5.9 µA
H
CTL
CTL Hysteresis 3V V
IN
36V 170 mV
ELECTRICAL CHARACTERISTICS

LTC4414IMS8#TRPBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Power Management Specialized - PMIC 36V, L Loss PwrPath Cntr for Lrg PFETs
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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