Datasheet

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
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