LTC4411ES5#TR Linear Technology, LTC4411ES5#TR Datasheet - Page 6

• Manufacturer Part Number: LTC4411ES5#TR
• Description: IC IDEAL DIODE LOW LOSS TSOT23-5
• Manufacturer: Linear Technology

Specifications of LTC4411ES5#TR

• Applications: Handheld/Mobile Devices
• Fet Type: P-Channel
• Number Of Outputs: 1
• Internal Switch(s): Yes
• Delay Time - On: 1.2µs
• Delay Time - Off: 1.1µs
• Voltage - Supply: 2.6 V ~ 5.5 V
• Current - Supply: 40µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC4411
OPERATIO
When the load current exceeds I
condition is detected and the LTC4411 will limit the output
current. This will cause the output voltage to drop as the
load current exceeds the amount of current that the
LTC4411 can supply. This condition will increase the
power consumption within the LTC4411.
When an alternate power source is connected to the
output, the LTC4411 will sense the increased voltage at
OUT, and the amplifier (A) will increase the voltage at
V
power source for the LTC4411 (V
source current from the OUT pin. At the same time V
will be pulled to V
now in the reverse turn-off mode. Power to the load is
being delivered from an alternate supply, and only a small
APPLICATIO S I FOR ATIO
6
INTRODUCTION
The LTC4411 is intended for power control applications
that include low loss diode ORing, fully automatic
switchover from a primary to an auxiliary source of power,
microcontroller controlled switchover from a primary to
an auxiliary source of power, load sharing between two or
more batteries, charging of multiple batteries from a
single charger and high side power switching.
GATE
. When V
OUT
DD
U
is higher than V
U
, which will turn off P1. The system is
NORMAL OPERATION
U
V
IN
– V
OUT
DD
MAX
< V
IN
W
FWD
) will be diverted to
+ V
, an over current
I
I
OUT
OUT
RTO
V
CONSTANT V
CONSTANT R
IN
> I
> I
CONSTANT I
REGULATION
REGULATION
REGULATION
– V
FWD
MAX
REVERSE
BIASED
Figure 4. State Transition Diagram
, the internal
OUT
I
I
> V
OUT
OUT
U
ON
ON
FWD
ON
< I
< I
MAX
FWD
I STAT = 10µA
DIODE OFF
I STAT = 0
DIODE ON
I STAT = 0
DIODE ON
I STAT = 0
DIODE ON
GATE
current is drawn from IN to sense the potential V
reverse turn-off mode the STAT pin will sink 10µA to
indicate that the diode is not conducting.
When the CTL input is asserted (high), P1 will have its gate
voltage pulled high, and the STAT pin will sink 10µA. A 3µA
pull-down current on the CTL pin will ensure a low level at
this input if it is left open circuited.
The overtemperature condition is detected when the
internal die temperature increases beyond 150°C. The
overtemperature condition will cause the gate amplifier
(A) as well as P1 to be shut off. When the internal die
temperature cools to below 140°C, the amplifier will turn
on and revert to normal operation. Note that prolonged
operation under overtemperature conditions will degrade
reliability.
Automatic PowerPath Control
Figure 1 illustrates an application circuit for automatic
switchover of a load between a battery and a wall adapter
or other power input. With initial application of the battery,
the load will be charged up as the LTC4411 turns on. The
LTC4411 will control the gate voltage of its internal MOSFET
to reduce the MOSFET’s voltage drop to a low forward
voltage (V
WHERE:
V
V
V
DD
IL
IH
= V
= V
= MAX {V
TH
TH
T
T
V
V
V
V
J
J
– V
CTL
+ V
CTL
DD
DD
> 150°C
< 140°C
FWD
HYST
HYST
IN
> V
< V
< 2.3
> 2.4
, V
IH
IL
/2
/2
OUT
). The system is now in the forward regula-
}
TEMPERATURE
SHUTDOWN
SHUTDOWN
LOCK-OUT
CONTROL
VOLTAGE
UNDER
OVER
I STAT = 10µA
DIODE OFF
I STAT = 0
DIODE OFF
I STAT = 0
DIODE OFF
4411 F04
IN
. During
4411fa