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LTC3350 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3350
Description  High Current Supercapacitor Backup Controller and System Monitor
PDF  46 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3350 Datasheet(HTML) 5 Page - Linear Technology

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LTC3350
5
3350fc
For more information www.linear.com/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
UNITS
DCMAX
Maximum Duty Cycle
Step-Down Mode
Step-Up Mode
97
87
98
93
99.5
%
%
Gate Drivers
RUP-TG
TGATE Pull-Up On-Resistance
2
Ω
RDOWN-TG
TGATE Pull-Down On-Resistance
0.6
Ω
RUP-BG
BGATE Pull-Up On-Resistance
2
Ω
RDOWN-BG
BGATE Pull-Down On-Resistance
0.6
Ω
tr-TG
TGATE 10% to 90% Rise Time
CLOAD = 3.3nF
18
25
ns
tf-TG
TGATE 10% to 90% Fall Time
CLOAD = 3.3nF
8
15
ns
tr-BG
BGATE 10% to 90% Rise Time
CLOAD = 3.3nF
18
25
ns
tf-BG
BGATE 10% to 90% Fall Time
CLOAD = 3.3nF
8
15
ns
tNO
Non-Overlap Time
50
ns
tON(MIN)
85
ns
INTVCC Linear Regulator
VINTVCC
Internal VCC Voltage
5.2V ≤ VIN ≤ 35V
5
V
∆VINTVCC
Load Regulation
IINTVCC = 50mA
–1.5
–2.5
%
PowerPath/Ideal Diodes
VFTO
Forward Turn-On Voltage
65
mV
VFR
Forward Regulation
30
mV
VRTO
Reverse Turn Off
–30
mV
tIF(ON)
INFET Rise Time
INFET – VIN > 3V, CINFET = 3.3nF
560
µs
tIF(OFF)
INFET Fall Time
INFET – VIN < 1V, CINFET = 3.3nF
1.5
µs
tOF(ON)
OUTFET Rise Time
OUTFET – VCAP > 3V, COUTFET = 3.3nF
0.13
µs
tOF(OFF)
OUTFET Fall Time
OUTFET – VCAP < 1V, COUTFET = 3.3nF
0.26
µs
Power-Fail Comparator
VPFI(TH)
PFI Input Threshold (Falling Edge)
l
1.147
1.17
1.193
V
VPFI(HYS)
PFI Hysteresis
30
mV
IPFI
PFI Input Leakage Current
VPFI = 0.5V
l
–50
50
nA
VPFO
PFO Output Low Voltage
ISINK = 5mA
200
mV
IPFO
PFO High-Z Leakage Current
VPFO = 5V
l
1
μA
PFI Falling to PFO Low Delay
85
ns
PFI Rising to PFO High Delay
0.4
μs
CAPGD
VCAPFB(TH)
CAPGD Rising Threshold as % of Regulated VCAP
Feedback Voltage
Vcapfb_dac = Full Scale (1111b)
l
90
92
94
%
VCAPFB(HYS) CAPGD Hysteresis at CAPFB as a % of Regulated
VCAP Feedback Voltage
Vcapfb_dac = Full Scale (1111b)
1.25
%
VCAPGD
CAPGD Output Low Voltage
ISINK = 5mA
200
mV
ICAPGD
CAPGD High-Z Leakage Current
VCAPGD = 5V
l
1
μA



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