Datasheet

LTC3676/LTC3676-1
5
3676fa
For more information www.linear.com/LTC3676
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= PV
IN1
= PV
IN2
= PV
IN3
= PV
IN4
= V
IN_L2
= V
IN_L3
=
V
IN_L4
= DV
DD
= 3.8V. All regulators disabled unless otherwise noted.d.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Load Regulation (LTC3676)
Load Regulation (LTC3676-1)
I
LDO4
= 1mA to 300mA 0.01
0.05
%
%
Short-Cir
cuit Current Limit 770 mA
Dropout Voltage (Note 4) I
LDO4
= 300mA, V
LDO4
= 2.5V
I
LDO4
= 300mA, V
LDO4
= 1.2V
210
450
260
615
mV
mV
Feedback Pin Input Current (LTC3676) V
LDO4_FB
= 725mV –0.05 0.05 µA
Enable Inputs
Threshold Rising All Enables Low
l
0.75 1.2 V
Threshold Falling One Enable High
l
0.4 0.7
Precision Threshold One or More Enables
l
0.370 0.400 0.430 V
Input Pull-Down Resistance 4.5 MΩ
VSTB, PWR_ON Inputs
Threshold
l
0.370 0.400 0.430 V
Pull-Down Resistance 4.5 MΩ
Pushbutton Interface
ON Threshold Rising
ON Threshold Falling
l
l
0.4
0.75
0.7
1.2 V
V
ON Input Current ON
= V
IN
ON = 0V
–1
–40
1 µA
µA
ON Low T
ime to IRQ Low 50 ms
ON High Time to IRQ High 0.2 µs
ON Low Time to WAKE High 400 ms
ON Low Time to Hard Reset CNTRL[6] = 0 10 sec
IRQ Minimum Pulse Width 50 ms
IRQ Blanking from WAKE Low 1 sec
Minimum WAKE Low Time 1 sec
WAKE High Time with PWR_ON = 0V 5 sec
PWR_ON High to WAKE High 3 ms
PWR_ON Low to WAKE Low 3 ms
Status Output Pins (WAKE, PGOOD, RSTO, IRQ)
WAKE Output Low Voltage I
WAKE
= 3mA 0.1 0.4 V
WAKE Output High Leakage Current V
WAKE
= 3.8V –0.1 0.1 µA
PGOOD Output Low Voltage I
PGOOD
= 3mA 0.1 0.4 V
PGOOD Output High Leakage Current V
PGOOD
= 3.8V –0.1 0.1 µA
PGOOD Threshold Rising
PGOOD Threshold Falling
–6
–8
%
%
RSTO Output Low V
oltage I
RSTO
= 3mA 0.1 0.4 V
RSTO Output High Leakage Current V
RSTO
= 3.8V –0.1 0.1 µA
LDO1 Power Good Threshold Rising
LDO1 Power Good Threshold Falling
–7.5
–10
%
%
IRQ Output Low V
oltage I
IRQ
= 3mA 0.1 0.4 V
IRQ Output High Leakage Current V
IRQ
= 3.8V –0.1 0.1 µA