LTC3553_15 Datasheet, PDF (5/36 Pages) Linear Technology – Micropower USB Power Manager With Li-Ion Charger, LDO and Buck Regulator

LTC3553
LDO REGULATOR Electrical Characteristics
The l denotes specifications that apply over the full operating temperature range, otherwise specifications are at T_A = 25°C (Note 2).
LDO_ON = V_OUT = V_INLDO = 3.8V, STBY = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_INLDO
Input Voltage Range
(Note 9)
l 1.65
V_OUT UVLO V_OUT Undervoltage Lockout
V_OUT Falling
2.5
V_OUT Rising
V_{LDO_FB} Regulated Feedback Voltage
I_LDO = 1mA, STBY High or Low (Note 10)
l 780
V_{LDO_FB} Line Regulation
I_LDO = 1mA, V_INLDO = 1.65V to 5.5V (Note 10)
V_{LDO_FB} Load Regulation
I_LDO = 1mA to 150mA (Note 10)
I_{LDO_FB} Feedback Pin Input Current
–50
I_{LDO_OC} Available Output Current
l 150
I_{LDO_SC} Short-Circuit Output Current
(Note 7)
V_DROP
Dropout Voltage (Note 13)
I_LDO = 150mA, V_INLDO = 3.8V
I_LDO = 150mA, V_INLDO = 2.5V
I_LDO = 75mA, V_INLDO = 1.8V
t_{LDO_SS} Soft-Start Time
R_{LDO_PD} Output Pull-Down Resistance in Shutdown LDO_ON = 0V
2.6
2.8
800
0.7
0.025
300
160
220
180
0.2
10
5.5
V
V
2.9
V
820
mV
mV/V
mV/mA
50
nA
mA
mA
260
mV
350
mV
280
mV
ms
kΩ
PUSHBUTTON INTERFACE Electrical Characteristics
The l denotes specifications that apply over the full operating temperature range, otherwise specifications are at T_A = 25°C (Note 2).
V_BAT = 3.8V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Pushbutton Pin (ON)
V_{CC_PB}
V_{ON_TH}
Pushbutton Operating Supply Range
ON Threshold Rising
ON Threshold Falling
(Notes 4 , 9)
l 2.7
0.4
5.5
V
1.2
V
V
I_ON
ON Input Current
R_{PB_PU}
Pushbutton Pull-Up Resistance
Logic Input Pins (BUCK_ON, LDO_ON, SEQ)
V_ON = V_CC (Note 4)
Pull-Up to V_CC (Note 4)
–1
1
µA
200 400 650
kΩ
Input High Voltage
Input Low Voltage
1.2
V
0.4
V
Input Current
–1
1
µA
Status Output Pin (PBSTAT)
I_PBSTAT
V_PBSTAT
PBSTAT Output High Leakage Current
PBSTAT Output Low Voltage
V_PBSTAT = 3V
I_PBSTAT = 3mA
–1
1
µA
0.1
0.4
V
3553fc
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