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LTC4155 датащи(PDF) 4 Page - Analog Devices

номер детали LTC4155
подробное описание детали  2.5A Supercapacitor Backup Power Manager
PDF  26 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

LTC4155 датащи(HTML) 4 Page - Analog Devices

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LTC4041
4
Rev A
For more information www.analog.com
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Backup Boost Switching Regulator
VBSTFB
BSTFB Pin Servo Voltage
l
0.78
0.8
0.82
V
IBSTFB
BSTFB Pin Input Leakage Current
VBSTFB = 0.9V
–20
20
nA
VSYS-BACKUP Programmed Boost Output Voltage Range
2.7
5
V
fOSC(BST)
Step-Up Converter Switching Frequency
1.0
1.125
1.25
MHz
ILIM(BST)
NMOS Switch Current Limit
5.5
6.5
7.5
A
RP(BST)
High Side Switch On-Resistance
75
mΩ
RN(BST)
Low Side Switch On-Resistance
70
mΩ
VSYS Overvoltage Shutdown Threshold
VSYS Rising
5.3
5.5
5.7
V
Hysteresis
100
mV
Boost Undervoltage Lockout
Max(VSYS, VSCAP) Falling
2.5
V
Hysteresis
150
mV
DMAX
Maximum Boost Duty Cycle
88
%
NMOS Switch Leakage Current
BSTEN = 1, CHGEN = 1
0
1
µA
PMOS Switch Leakage Current
BSTEN = 1, CHGEN = 1
0
1
µA
tMIN-BACKUP Minimum Backup Time
CCPF = 1nF
2.2
ms
SYSGD Comparator
RSTFB Threshold
VRSTFB Falling
l
0.72
0.74
0.76
V
Hysteresis
20
mV
IRSTFB
RSTFB Pin Input Leakage Current
VRSTFB = 0.9V
–50
0
50
nA
SYSGD Delay
VRSTFB Rising & Falling
100
µs
Power-Fail Comparator
PFI Input Threshold
VPFI Falling
l
1.17
1.16
1.19
1.19
1.21
1.22
V
V
Hysteresis
40
mV
PFI Pin Leakage Current
VPFI = 1.3V
–100
0
100
nA
PFI Delay to PFO
VPFI Falling
0.5
µs
PFO Pin Leakage Current
VPFO = 5V
0
1
µA
PFO Pin Output Low Voltage
IPFO = 5mA
65
200
mV
Logic Input (BSTEN, CHGEN, CAPSEL, CAPFLT)
VIL
Logic Low Input Voltage
l
0.4
V
VIH
Logic High Input Voltage
l
1.2
V
IIL
Logic Low Input Leakage Current
BSTEN, CHGEN
0
1
µA
IIH
Logic High Input Leakage Current
BSTEN, CHGEN
0
1
µA
CAPSEL Pin Leakage Current
CAPSEL = 1
10
µA
The l denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3) VIN = VSYS = 5V, VSCAP = 2.5V, RPROG = 2k, unless otherwise noted.
ELECTRICAL CHARACTERISTICS



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