LTC3577_15 Datasheet, PDF (8/54 Pages) Linear Technology – Highly Integrated 6-Channel Portable PMIC

LTC3577/LTC3577-1
ELECTRICAL CHARACTERISTICS LDO Regulators. The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T_A = 25°C. V_INLDO1 = V_INLDO2 = V_OUT = V_BAT = 3.8V, LDO1 and LDO2
enabled unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
I_{LDO1_SC}
V_DROP1
Short-Circuit Output Current
Dropout Voltage (Note 12)
R_{LDO1_PD} Output Pull-Down Resistance in Shutdown
LDO Regulator 2 (LDO2 – Enabled via I²C)
I_LDO1 = 150mA, V_INLDO1 = 3.6V
I_LDO1 = 150mA, V_INLDO1 = 2.5V
I_LDO1 = 75mA, V_INLDO1 = 1.8V
LDO1 Disabled
270
mA
160
260
mV
200
320
mV
170
280
mV
10
kΩ
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
V
2.8
2.9
V
I_{QLDO2_VO} LDO2 V_OUT Quiescent Current
I_{QLDO2_VI} LDO2 V_INLDO2 Quiescent Current
LDO2 Enabled, PON State, I_LDO2 = 0mA
LDO2 Enabled, PON State, I_LDO2 = 0mA
18
30
μA
0.1
2
μA
I_VINLDO2 Shutdown Current
LDO2 Disabled, PON or POFF State
0.01
1
μA
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_FB} LDO2_FB Input Current
LDO2_FB = 0.8V
–50
50
nA
I_{LDO2_OC} Available Output Current
l 150
mA
I_{LDO2_SC} Short-Circuit Output Current
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
260
mV
200
320
mV
170
280
mV
R_{LDO2_PD} Output Pull-Down Resistance in Shutdown LDO2 Disabled
14
kΩ
LED Boost Switching Regulator. The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T_A = 25°C. V_IN3 = V_OUT = 3.8V, R_OV = 10M, R_{LED_FS} = 20k, boost regulator disabled unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
V_IN3, V_OUT
I_{VOUT_LED}
Operating Supply Range
Operating Quiescent Current
Shutdown Quiescent Current
(Note 9)
(Notes 10, 14)
l 2.7
5.5
V
560
μA
0.01
μA
V_{LED_OV}
LED_OV Overvoltage Threshold
LED_OV Rising
LED_OV Falling
1.0
1.25
V
0.6
0.85
V
I_LIM
I_{LED_FS}
I_{LED_DIM}
R_NSWON
I_NSWOFF
f_OSC
V_{LED_FS}
I_{LED_OV}
D_BOOST
V_BOOSTFB
Peak NMOS Switch Current
I_LED Pin Full-Scale Operating Current
I_LED Pin Full-Scale Dimming Range
R_DS(ON) of NMOS Switch
NMOS Switch-Off Leakage Current
Oscillator Frequency
LED_FS Pin Voltage
LED_OV Pin Current
Maximum Duty Cycle
Boost Mode I_LED Feedback Voltage
64 Steps
V_SW = 5.5V
R_{LED_FS} = 20k
I_LED = 0
800
1000
1200
mA
18
20
22
mA
60
dB
240
mΩ
0.01
1
μA
0.95
1.125
1.3
MHz
l 780
800
820
mV
l 3.8
4
4.2
μA
97
%
l 775
800
825
mV
3577fa
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