Datasheet

LTC3677-3
8
36773f
elecTrical characTerisTics
LDO Regulators. The l denotes the specifications which apply over the
full operating junction temperature range, otherwise specifications are at T
J
= 25°C. V
INLDO1
= V
INLDO2
= V
OUT
= 3.8V, LDO1 and LDO2
enabled unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
LDO Regulator 1 (LDO1-Always On)
V
INLDO1
Input Voltage Range V
INLDO1
≤ V
OUT
+ 0.3V
l
1.65 5.5 V
V
OUT_UVLO
V
OUT
Falling
V
OUT
Rising
LDO1 Is Disabled Below V
OUT
UVLO 2.5 2.7
2.8 2.9
V
V
V
LDO1_FB
LDO1_FB Regulated Feedback Voltage I
LDO1
= 1mA
l
0.78 0.8 0.82 V
LDO1_FB Line Regulation (Note 11) I
LDO1
= 1mA, V
IN
= 1.65V to 5.5V 0.4 mV/V
LDO1_FB Load Regulation (Note 11) I
LDO1
= 1mA to 150mA 5 µV/mA
I
LDO1_OC
Available Output Current
l
150 mA
I
LDO1_SC
Short-Circuit Output Current (Note 7) 270 mA
V
DROP1
Dropout Voltage (Note 12) I
LDO1
= 150mA, V
INLDO1
= 3.6V
I
LDO1
= 150mA, V
INLDO1
= 2.5V
I
LDO1
= 75mA, V
INLDO1
= 1.8V
160
200
170
260
320
280
mV
mV
mV
R
LDO1_PD
Output Pull-Down Resistance in Shutdown LDO1 Disabled 10 kΩ
I
LDO_FB1
LDO_FB1 Input Current –50 50 nA
LDO Regulator 2 (LDO2-Pushbutton Enabled, First in Sequence)
V
INLDO2
Input Voltage Range V
INLDO2
≤ V
OUT
+ 0.3V
l
1.65 5.5 V
V
OUT_UVLO
V
OUT
Falling
V
OUT
Rising
LDO2 is Disabled Below V
OUT
UVLO 2.5 2.7
2.8 2.9
V
V
V
LDO2_FB
LDO2_FB Regulated Output Voltage I
LDO2
= 1mA
l
0.78 0.8 0.82 V
LDO2_FB Line Regulation (Note 11) I
LDO2
= 1mA, V
IN
= 1.65V to 5.5V 0.4 mV/V
LDO2_FB Load Regulation (Note 11) I
LDO2
= 1mA to 150mA 5 µV/mA
I
LDO2_OC
Available Output Current
l
150 mA
I
LDO2_SC
Short-Circuit Output Current (Note 7) 270 mA
V
DROP2
Dropout Voltage (Note 12) I
LDO2
= 150mA, V
INLDO2
= 3.6V
I
LDO2
= 150mA, V
INLDO2
= 2.5V
I
LDO1
= 75mA, V
INLDO1
= 1.8V
160
200
170
260
320
280
mV
mV
mV
R
LDO2_PD
Output Pull-Down Resistance in Shutdown LDO2 Disabled 14 kΩ
I
LDO_FB2
LDO_FB2 Input Current –50 50 nA