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

LTC3577/LTC3577-1
ELECTRICAL CHARACTERISTICS I²C Interface. The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T_A = 25°C. DV_CC = 3.3V, V_OUT = 3.8V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DV_CC
I_DVCC
Input Supply Voltage
DV_CC Supply Current
SCL = 400kHz
SCL = SDA = 0kHz
1.6
5.5
V
1
μA
0.4
μA
V_DVCC,UVLO DV_CC UVLO
V_IH
Input HIGH Voltage
V_IL
Input LOW Voltage
I_IH
Input HIGH Leakage Current
SDA = SCL = DV_CC = 5.5V
I_IL
Input LOW Leakage Current
SDA = SCL = 0V, DV_CC = 5.5V
V_OL
SDA Output LOW Voltage
I_SDA = 3mA
Timing Characteristics (Note 8) (All Values are Referenced to V_IH and V_IL)
f_SCL
SCL Clock Frequency
t_LOW
LOW Period of the SCL Clock
t_HIGH
HIGH Period of the SCL Clock
t_BUF
Bus Free Time Between Stop and Start Condition
t_HD,STA
Hold Time After (Repeated) Start Condition
t_SU,STA
Setup Time for a Repeated Start Condition
t_SU,STO
Stop Condition Setup Time
t_HD,DATO
Output Data Hold Time
t_HD,DATI
Input Data Hold Time
t_SU,DAT
Data Setup Time
t_SP
Input Spike Suppression Pulse Width
1.0
V
50
70
%DV_CC
30
50
%DV_CC
–1
1
μA
–1
1
μA
0.4
V
400
kHz
1.3
μs
0.6
μs
1.3
μs
0.6
μs
0.6
μs
0.6
μs
0
900
ns
0
ns
100
ns
50
ns
Step-Down Switching Regulators. The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T_A = 25°C. V_OUT = V_IN12 = V_IN3 = 3.8V, all regulators enabled unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Step-Down Switching Regulators (Buck1, Buck2 and Buck3)
V_IN12, V_IN3 Input Supply Voltage
(Note 9)
l 2.7
5.5
V
V_OUT UVLO
V_OUT Falling
V_OUT Rising
V_IN12 and V_IN3 Connected to V_OUT Through
2.5
2.7
V
Low Impedance. Switching Regulators are
Disabled Below V_OUT UVLO
2.8
2.9
V
f_OSC
Oscillator Frequency
1.91
2.25
2.59
MHz
800mA Step-Down Switching Regulator 3 (Buck3 – Pushbutton Enabled, Third in Sequence)
I_VIN3Q
Pulse-Skipping Mode Input Current
Burst Mode Operation Input Current
(Note 10)
(Note 10)
100
μA
17
μA
Shutdown Input Current
0.01
μA
I_LIM3
Peak PMOS Current Limit
V_FB3
Feedback Voltage
(Note 7)
Pulse-Skipping Mode
Burst Mode Operation
1000
1400
1700
mA
l 0.78
0.8
0.82
V
l 0.78
0.8
0.824
V
I_FB3
FB3 Input Current
D3
Max Duty Cycle
(Note 10)
FB3 = 0V
–0.05
100
0.05
μA
%
R_P3
R_DS(ON) of PMOS
R_N3
R_DS(ON) of NMOS
0.3
Ω
0.4
Ω
3577fa
6