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LTC3675_15 Datasheet, PDF (5/38 Pages) Linear Technology – 7-Channel Configurable High Power PMIC
◁
LTC3675/LTC3675-1
Electrical Characteristics The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP MAX UNITS
VFB3,4(HIGH) Feedback Regulation Voltage
Pulse-Skipping Mode Full-Scale (1,1,1,1) l 780
800 820
mV
VFB3,4(LOW) Feedback Regulation Voltage
Pulse-Skipping Mode Full-Scale (0,0,0,0) l 405
425 445
mV
VLSB3,4
FB3, FB4 Regulation Voltage Step Size
25
mV
IFB3,4
Feedback Leakage Current
VFB3 = VFB4 = 0.85V
–50
50
nA
Dmax3,4
Maximum Duty Cycle
VFB3 = VFB4 = 0V
l 100
%
RPMOS3,4
PMOS On-Resistance
ISW3 = ISW4 = 100mA
500
mΩ
RNMOS3,4
NMOS On-Resistance
ISW3 = ISW4 = –100mA
510
mΩ
ILEAKP3,4
PMOS Leakage Current
EN3 = EN4 = 0
–1
1
µA
ILEAKN3,4
RSWPD3,4
NMOS Leakage Current
EN3 = EN4 = 0
Output Pull-Down Resistance in Shutdown EN3 = EN4 = 0 (I2C Bit Set)
–1
1
µA
10
kΩ
tSS3,4
Soft-Start Time
500
µs
Buck Regulators Combined
IFWD1+2
PMOS Current Limit
IFWD2+3
PMOS Current Limit
IFWD3+4
PMOS Current Limit
1A Boost Regulator
FB2 = VIN (Note 6)
FB3 = VIN (Note 6)
FB4 = VIN (Note 6)
5.6
A
4
A
2.4
A
IVIN5
PWM Mode
Burst Mode Operation
VOUT5(MAX) Maximum Regulated Output Voltage
IFWD5
Forward Current Limit
VFB5(HIGH)
Feedback Regulation Voltage
VFB5(LOW)
Feedback Regulation Voltage
VLSB5
FB5 Regulation Voltage Step Size
IFB5
Feedback Leakage Current
DCmax5
Maximum Duty Cycle
RPMOS5
PMOS On-Resistance
RNMOS5
NMOS On-Resistance
ILEAKP
PMOS Switch Leakage Current
ILEAKN
NMOS Switch Leakage Current
ROUTPD5
Output Pull-Down Resistance in Shutdown
tSS5
Soft-Start Time
1A Buck-Boost Regulator
IVIN6
PWM Mode
Burst Mode Operation
VOUT6(low)
VOUT6(high)
IFWD6
Minimum Regulated Output Voltage
Maximum Regulated Output Voltage
Forward Current Limit
IPEAK6
Peak Current Limit
IZERO6
Zero Current Limit
VFB6(HIGH)
VFB6(LOW)
VLSB6
Feedback Regulation Voltage
Feedback Regulation Voltage
FB6 Regulation Voltage Step Size
VFB5 = 0.85V (Notes 4, 5)
VFB5 = 0.85V (Notes 4, 5)
(Note 6)
PWM Mode Full-Scale (1,1,1,1)
PWM Mode Full-Scale (0,0,0,0)
VFB5 = 0.85V
NMOS Switch
Boost Regulator Off
VFB6 = 0.85V (Note 4, 5)
VFB6 = 0.85V(Note 4, 5)
PWM Mode (Note 6)
Burst Mode Operation (Note 6)
Burst Mode Operation
PWM Mode Full-Scale (1,1,1,1)
PWM Mode Full-Scale (0,0,0,0)
150 300
µA
35
60
µA
5.35
5.55 5.75
V
2.5
3.15 3.9
A
l 780
800 820
mV
l 405
425 445
mV
25
mV
–50
50
nA
90
%
260
mΩ
275
mΩ
–2
2
µA
–2
2
µA
10
kΩ
500
µs
220 400
µA
20
40
µA
2.65 2.8
V
5.25
5.65
V
2.1
2.65 3.2
A
200
275 350
mA
–30
0
30
mA
l 780
800 820
mV
l 405
425 445
mV
25
mV
36751fc
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