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LTC4415IDHC#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC4415
1
4415fa
Typical applicaTion
FeaTures DescripTion
Dual 4A Ideal Diodes with
Adjustable Current Limit
The LTC
®
4415 contains two monolithic PowerPath ideal
diodes, each capable of supplying up to 4A with typical
forward conduction resistance of 50mΩ. The diode voltage
drops are regulated to 15mV during forward conduction at
low currents, extending the power supply operating range
and ensuring no oscillations during supply switchover.
Less than 1µA of reverse current flows from OUT to IN
making this device well suited for power supply ORing
applications.
The two ideal diodes are independently enabled and
prioritized using inputs EN1 and EN2. The output current
limits can be adjusted independently from 0.5A to 4A
using resistors on the CLIM pins. Furthermore, the ideal
diode currents can be monitored via CLIM pin voltages.
Open-drain status pins indicate when the ideal diodes are
forward conducting. When the die temperature approaches
thermal shutdown, or if the output load exceeds the cur-
rent limit threshold, the corresponding warning pins are
pulled low.
Prioritized Power Supply ORing
applicaTions
n
Dual 50mΩ Monolithic Ideal Diodes
n
1.7V to 5.5V Operating Range
n
Up to 4A Adjustable Current Limit for Each Diode
n
Low Reverse Leakage Current (1µA Max)
n
15mV Forward Drop in Regulation
n
Smooth Switchover in Diode ORing
n
Load Current Monitor
n
Precision Enable Thresholds to Set Switchover
n
Soft-Start to Limit Inrush Current on Start-Up
n
Status Pins to Indicate Forward Diode Conduction
n
Current and Thermal Limit with Warning
n
Thermally Enhanced 16-Lead MSOP and DFN
(3mm × 5mm) Packages
n
High Current PowerPath™ Switch
n
Battery and Wall Adapter Diode ORing
n
Backup Battery Diode ORing
n
Logic Controlled High Current Power Switch
n
Supercapacitor ORing
n
Multiple Battery Sharing
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
IDEAL
IDEAL
LTC4415
GND
EN1
4415 TA01a
4.7µF
TO
LOAD
100k
21.5k
124Ω124Ω
CLIM1
CLIM2
STAT1
WARN1
WARN2
STAT2
EN2
IN2
IN1 OUT1
OUT2
PRIMARY
POWER
SOURCE
SECONDARY
POWER
SOURCE
+
FORWARD VOLTAGE DROP (mV)
0
LOAD CURRENT (A)
3
4
400
4415 TA01b
2
1
0
100
200
300
500
CURRENT LIMIT
LTC4415
R
ON
= 50mΩ
SCHOTTKY
DIODE
MBRS410E
Forward Characteristics of LTC4415
vs MBRS410E Schottky
LTC4415
2
4415fa
absoluTe MaxiMuM raTings
IN1, IN2, OUT1, OUT2, CLIM1, CLIM2,
STAT1, STAT2, WARN1, WARN2 Voltage ....... –0.3V to 6V
EN1, EN2 Voltage ................. –0.3V to Max (V
INx
, V
OUTx
)
Operating Junction Temperature Range
(Notes 3, 4) .............................................–40°C to 125°C
(Note 1)
16
15
14
13
12
11
10
9
17
GND
1
2
3
4
5
6
7
8
OUT1*
OUT1*
STAT1
WARN1
WARN2
STAT2
OUT2*
OUT2*
IN1*
IN1*
EN1
CLIM1
CLIM2
EN2
IN2*
IN2*
TOP VIEW
DHC PACKAGE
VARIATION A
16-LEAD (5mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*ADJACENT PINS ON THE FOUR CORNERS ARE FUSED TOGETHER
1
2
3
4
5
6
7
8
IN1*
IN1*
EN1
CLIM1
CLIM2
EN2
IN2*
IN2*
16
15
14
13
12
11
10
9
OUT1*
OUT1*
STAT1
WARN1
WARN2
STAT2
OUT2*
OUT2*
TOP VIEW
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 35°C/W TO 40°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*ADJACENT PINS ON THE FOUR CORNERS ARE FUSED TOGETHER INTERNALLY.
pin conFiguraTion
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4415EDHC#PBF LTC4415EDHC#TRPBF 4415
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 125°C
LTC4415IDHC#PBF LTC4415IDHC#TRPBF 4415
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 125°C
LTC4415EMSE#PBF LTC4415EMSE#TRPBF 4415 16-Lead Plastic MSOP –40°C to 125°C
LTC4415IMSE#PBF LTC4415IMSE#TRPBF 4415 16-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
Storage Temperature Range .................. –65°C to 150°C
Peak Reflow Temperature ..................................... 260°C
LTC4415
3
4415fa
elecTrical characTerisTics
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Notes 2, 3). V
IN1
= V
IN2
= 3.6V, R
CLIM
= 250Ω, unless otherwise
specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN1
, V
OUT1
,
V
IN2
, V
OUT2
Operating Supply Range At Least One Input/Output Must Be in This Range
l
1.7 5.5 V
V
UVLO
Undervoltage Lockout V
INx
Rising
Hysteresis
l
1.63
55
1.7 V
mV
I
QF
Quiescent Current In Forward Regulation
(Note 5)
V
IN1
= V
EN1
= V
EN2
= 3.6V, I
OUT1
= –1mA,
V
IN2
= V
OUT2
= 0V, Measured Through GND Pin
l
44 80 µA
I
QOFF
Quiescent Current In Shutdown V
IN1
= V
IN2
= V
EN2
= 3.6V, V
EN1
= 0V,
V
OUT1
= V
OUT2
= 0V, Measured Through GND Pin
l
13 28 µA
I
QR(OUT)
Reverse Turn-Off Current: OUT1
OUT2
V
IN1
= 3.6V, V
OUT1
= 3.7V, V
IN2
= 3.5V, V
OUT2
= 3.6V
(V
OUT1
> V
OUT2
)
l
l
18
5
40
11
µA
µA
I
QR(IN)
INx Pin Current In Reverse Turn-Off V
OUT1
= V
OUT2
= 5.5V
l
4 10 µA
I
LEAK(IN)
INx Pin Leakage Current V
IN1
= V
IN2
= 0V, V
OUT1
= V
OUT2
= 5.5V –1 1 µA
V
FR
Forward Regulation Voltage (V
INx
– V
OUTx
) I
OUTx
= –1mA
l
5 15 25 mV
V
RTO
Reverse Turn-Off Voltage (V
INx
– V
OUTx
)
l
–50 –30 –10 mV
R
FR
Forward Dynamic Resistance in
Regulation
I
OUTx
= –100mA to –300mA 18 30 mΩ
R
ON
On-Resistance in Constant Resistance
Mode
I
OUTx
= –1A 50 70 mΩ
t
ON
PowerPath Turn-On Time (Notes 6, 7) Before Enable V
OUT1
= 1.5V, Diode 1
Before Enable V
OUT2
= 1.5V, Diode 2
Before Enable V
OUTx
= 0V
10
23
250
µs
µs
µs
t
ON(SD)
PowerPath Turn-On from Shutdown
(Note 7)
Both Diodes Disabled and V
OUTx
= 1.5V Before Enable
Both Diodes Disabled and V
OUTx
= 0V Before Enable
70
320
µs
µs
t
SWITCH
PowerPath Switchover Time
V
INx
↑ (2.6V to 4.6V) to V
OUTx
Starts Rising, Both
Diodes Enabled, OUT1 and OUT2 Tied Together
9 µs
t
OFF
PowerPath Turn-Off Time Disable to I
IN
Falling from 100mA to 1mA 2 µs
t
SS
Soft-Start Duration (Note 8) V
OUTx
= 0V 2 ms
Current Monitor
Current Monitor Ratio I
CLIMx
/I
OUTx
When I
OUTx
= –4A
I
CLIMx
/I
OUTx
When I
OUTx
= –2A
0.9
0.8
1
1
1.1
1.2
mA/A
mA/A
Current Limit
V
CLIM
CLIM Clamp Voltage In Current Limit 0.5 V
I
LIM(ADJ)
Current Limit Adjustability
l
0.5 4 A
Accuracy of Adjustable Current Limit
Threshold
V
OUTx
= V
INx
– 0.5V, Current Limit = 4A
V
OUTx
= V
INx
– 0.5V, Current Limit = 2A
l
l
±8
±15
%
%
I
LIM(INT)
Internal Current Limit R
CLIMx
= 0Ω, V
OUTx
= 0V
l
4 6 9 A
T
WARN
Thermal Warning Threshold Rising Temperature
Hysteresis
130
15
°C
°C
T
SD
Thermal Shutdown Threshold Rising Temperature
Hysteresis
160
20
°C
°C
Open-Drain Status Outputs (STAT1, WARN1, STAT2, WARN2)
V
OL
Open-Drain Output Low Voltage Current Into Open-Drain Output = 3mA
l
0.05 0.4 V
Open-Drain Output High Leakage Current Open-Drain Output Voltage = 5.5V
l
0 1 µA
t
STAT(ON)
STAT Turn-On Time (Note 6) EN1 Rising to STAT1 Pull-Down
EN2 Falling to STAT2 Pull-Down
5
18
µs
µs
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC4415IDHC#TRPBF

Mfr. #:
Buy LTC4415IDHC#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Power Management Specialized - PMIC 2x 4A Ideal Diodes w/ Adj C Lim
Lifecycle:
New from this manufacturer.
Delivery:
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