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| LTC3350_15 Datasheet, PDF (5/46 Pages) Linear Technology – High Current Supercapacitor Backup Controller and System Monitor | |||
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LTC3350
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = VOUT = 12V, VDRVCC = VINTVCC unless otherwise
noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
DCMAX
Maximum Duty Cycle
Step-Down Mode
Step-Up Mode
97
98
99.5
87
93
Gate Drivers
RUP-TG
TGATE Pull-Up On-Resistance
RDOWN-TG TGATE Pull-Down On-Resistance
RUP-BG
BGATE Pull-Up On-Resistance
RDOWN-BG BGATE Pull-Down On-Resistance
tr-TG
TGATE 10% to 90% Rise Time
tf-TG
TGATE 10% to 90% Fall Time
tr-BG
BGATE 10% to 90% Rise Time
tf-BG
BGATE 10% to 90% Fall Time
tNO
Non-Overlap Time
tON(MIN)
INTVCC Linear Regulator
VINTVCC
Internal VCC Voltage
âVINTVCC Load Regulation
PowerPath/Ideal Diodes
CLOAD = 3.3nF
CLOAD = 3.3nF
CLOAD = 3.3nF
CLOAD = 3.3nF
5.2V ⤠VIN ⤠35V
IINTVCC = 50mA
2
0.6
2
0.6
18
25
8
15
18
25
8
15
50
85
5
â1.5 â2.5
VFTO
Forward Turn-On Voltage
VFR
Forward Regulation
VRTO
Reverse Turn Off
tIF(ON)
INFET Rise Time
tIF(OFF)
INFET Fall Time
tOF(ON)
OUTFET Rise Time
tOF(OFF)
OUTFET Fall Time
Power-Fail Comparator
65
30
â30
INFET â VIN > 3V, CINFET = 3.3nF
560
INFET â VIN < 1V, CINFET = 3.3nF
1.5
OUTFET â VCAP > 3V, COUTFET = 3.3nF
0.13
OUTFET â VCAP < 1V, COUTFET = 3.3nF
0.26
VPFI(TH)
VPFI(HYS)
IPFI
VPFO
IPFO
PFI Input Threshold (Falling Edge)
PFI Hysteresis
PFI Input Leakage Current
PFO Output Low Voltage
PFO High-Z Leakage Current
PFI Falling to PFO Low Delay
VPFI = 0.5V
ISINK = 5mA
VPFO = 5V
l 1.147 1.17 1.193
30
l â50
50
200
l
1
85
PFI Rising to PFO High Delay
0.4
CAPGD
VCAPFB(TH) CAPGD Rising Threshold as % of Regulated VCAP Vcapfb_dac = Full Scale (1111b)
Feedback Voltage
l 90
92
94
VCAPFB(HYS) CAPGD Hysteresis at CAPFB as a % of Regulated Vcapfb_dac = Full Scale (1111b)
VCAP Feedback Voltage
VCAPGD
CAPGD Output Low Voltage
ISINK = 5mA
ICAPGD
CAPGD High-Z Leakage Current
VCAPGD = 5V
l
1.25
200
1
UNITS
%
%
Ω
Ω
Ω
Ω
ns
ns
ns
ns
ns
ns
V
%
mV
mV
mV
µs
µs
µs
µs
V
mV
nA
mV
μA
ns
μs
%
%
mV
μA
For more information www.linear.com/LTC3350
3350fb
5
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