Datasheet

LTC3589/LTC3589-1/
LTC3589-2
5
3589ff
For more information www.linear.com/3589
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
LDO Regulators
t
LDO_SS
Soft-Start Time LDO2, LDO3, LDO4 100 µs
R
LDO_PD
Output Pull-Down Resistance LDO2, LDO3,
LDO4
LDO Disabled 2.5 kΩ
Always-On Regulator (LDO1_STDBY)
V
LDO1_FB
LDO1 Feedback Voltage
l
0.76 0.8 0.84 V
V
LDO1
LDO1 Line Regulation I
LDO1_STBY
= 1mA, LDO1_STBY = 1.2V,
V
IN
= 2.7V to 5.5V
0.15 %/V
LDO1 Load Regulation I
LDO1
= 0.1mA to 25mA,
LDO1_STBY = 1.2V
0.1 %
I
LDO1
Available Output Current
l
25 mA
I
LDO1_SC
Short-Circuit Output Current Limit 65 100 mA
V
DROP1
Dropout Voltage (Note 4) I
LDO1
= 25mA, LDO1_STBY = 3.3V 200 mV
I
LDO1_FB
LDO1_FB Input Current V
LDO1_FB
= 0.85V –50 50 nA
LDO Regulator 2 (LDO2)
V
IN_LDO2
V
IN_LDO2
Input Voltage Range
l
1.7 V
IN
V
I
VIN_LDO2
V
IN_LDO2
Quiescent Current
V
IN_LDO2
Shutdown Current
Regulator Enabled
Regulator Disabled
l
l
12
0
20
1
µA
µA
I
VIN
V
IN
Quiescent Current EN_LDO2 = High
l
50 85 µA
V
FB2(MAX)
LDO2 Maximum Feedback Voltage L2DT V1 = L2DT V2 = 11111
l
0.735 0.75 0.765 V
V
FB2(LSB)
LDO2 Feedback LSB Step Size 12.5 mV
V
FB2(MIN)
LDO2 Minimum Feedback Voltage L2DTV1 = L2DTV2 = 00000
V
IN_LDO2
= V
IN
= 2.7V to 5.5V,
I
LDO2
= 1mA
l
0.351 0.3625 0.374 V
LDO2 Line Regulation I
LDO2
=1mA, V
INLDO2
= 2.7V to 5.5V 0.01 %/V
LDO2 Load Regulation I
LDO2
= 1mA to 250mA 0.01 %
I
OUT2
LDO2 Available Output Current
l
250 mA
I
SC2
LDO2 Short-Circuit Current Limit 300 450 600 mA
V
DROP2
Dropout Voltage (Note 4) I
LDO2
= 200mA, V
LDO2
= 2.5V
I
LDO2
= 200mA, V
LDO2
= 1.2V
140
350
180
500
mV
mV
I
LDO2_FB
LDO2_FB Input Current V
LDO2_FB
= 0.8V –50 50 nA
LDO Regulator 3 (LDO3)
V
IN_LDO34
V
IN_LDO34
Input Range (LTC3589)
V
IN_LDO34
Input Range (LTC3589-1/LTC3589-2)
l
l
2.35
3.0
V
IN
V
IN
V
V
I
VIN_LDO34
V
IN_LDO34
Quiescent Current
V
IN_LDO34
Shutdown Current
Regulator Enabled
Regulator Disabled
l
l
15
0
29
1
µA
µA
I
VIN
V
IN
Quiescent Current
l
50 85 µA
V
LDO3
LDO3 Output Voltage (LTC3589)
LDO3 Output Voltage (LTC3589-1/LTC3589-2)
V
IN_LDO34
= V
IN
= 2.7V to 5V,
I
LDO3
= 1mA
l
l
1.746
2.716
1.8
2.8
1.854
2.884
V
V
LD03 Line Regulation I
LDO3
=1mA, V
INLDO34
= 2.7V to 5.5V 0.01 %/V
LDO3 Load Regulation I
LDO3
= 1mA to 250mA 0.05 %
I
LDO3
LDO3 Available Output Current
l
250 mA
I
LDO3_SC
LDO3 Short-Circuit Current Limit 300 450 600 mA
V
DROP3
LDO3 Dropout Voltage (LTC3589) (Note 4)
LDO3 Dropout Voltage (LTC3589-1/LTC3589-2)
(Note 4)
I
LDO3
= 200mA, V
LDO3
= 1.8V
I
LDO3
= 200mA, V
LDO3
= 2.8V
190
140
250
180
mV
mV
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_LDO2
= V
IN_LDO34
= DV
DD
= 3.8V. All regulators disabled unless otherwise noted.