LTC3675_12 Datasheet, PDF (6/38 Pages) Linear Technology – 7-Channel Confi gurable High Power PMIC

LTC3675
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP MAX
I_FB6
Feedback Leakage Current
DC6_BUCK(MAX) Maximum Buck Duty Cycle
V_FB6 = 0.85V
–50
50
Duty Cycle of PMOS Switch A
l 100
DC6_BOOST(MAX) Maximum Boost Duty Cycle
Duty Cycle of NMOS Switch C
75
R_PMOS6
PMOS On-Resistance
Switches A and D
260
R_NMOS6
NMOS On-Resistance
Switches B and C
275
I_LEAKP
PMOS Switch Leakage Current
–2
2
I_LEAKN
t_SS
NMOS Switch Leakage Current
Soft-Start Time
–2
2
500
R_OUTPD6
Output Pull-Down Resistance in Shutdown ENBB = 0
10
LED Driver; R_{LED_FS} = 20kΩ
I_VIN7
Input Current (MODE0 = MODE1 = 0)
V_{LED_OV}
LED Overvoltage Threshold
Feedback Voltage
LED_OV = 0.85V (Notes 4, 5)
Operating in LED Mode
Operating in Boost Mode
l 805
l 770
700 1000
825 845
800 830
V_{LED_FS}
LED Full-Scale Voltage
l 775
800 825
V_LED1,2
LED Pin Regulation Voltage
(Note 7)
300
V_{LED1,2_CLMP} LED Regulation Voltage Clamp
I_LIM7
Maximum Current Limit
(Note 6)
l 6.0
1.6
8.3
1.85 2.15
I_{LED_FS}
LED Full-Scale Current
l 23.25 25.0 26.75
I_{LED_2FS}
I_{LED_MATCH}
LED Full Current High Current Mode
LED1 and LED2 Current Matching at
Full-Scale
|I_LED1 − I_LED2 | _{• 100}
⎛ I_LED1 + I_LED2 ⎞
⎝⎜
2
⎠⎟
l 46.5
l
50 53.5
1
UNITS
nA
%
%
mΩ
mΩ
μA
μA
μs
kΩ
μA
mV
mV
mV
mV
V
A
mA
mA
%
I_{LED_LSB}
LED Current LSB
R_NMOS7
I_{LEAK_NMOS7}
F_LEDOSC
DC_MAX7
NMOS On-Resistance
NMOS Switch Leakage
Oscillator Frequency
Maximum Duty Cycle
25mA Always-On LDO
V_LDOFB
R_DO
I²C Port
Feedback Regulation Voltage
Dropout Resistance
DV_CC
I_DVCC
DV_{CC_UVLO}
ADDRESS
Input Supply Voltage
Input Supply Current
DV_CC UVLO
LTC3675 I²C Address
V_IH
V_IL
I_IH
I_IL
V_{OL_SDA}
f_SCL
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
SDA Output Low Voltage
Clock Operating Frequency
V_SW7 = 5.5V
NMOS Switch
SCL/SDA= 0kHz
SDA/SCL
SDA/SCL
SDA/SCL
SDA/SCL
I_SDA = 3mA
98
μA
300
mΩ
–1
1
μA
l 450 562.5 675
kHz
97
%
l 780
800 820
mV
12
Ω
l 1.6
5.5
V
0.3
1
μA
1
V
l
0001001[R/WB]
70
%DV_CC
30
%DV_CC
–1
0
1
μA
–1
0
1
μA
0.4
V
400
kHz
3675fa
6