155833 データシートの表示（PDF） - Linear Technology
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155833 Datasheet PDF : 20 Pages
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LTC1558-3.3/LTC1558-5
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Terminal Voltages
VCC .......................................................................................... 6V
VBAK, BACKUP ..................................................... 12V
SW ...................................................................... 14V
All Other Pins .................................. – 0.3V to VCC + 0.3V
Input Currents (SW) ........................................... 500mA
VBAK Output Current ................... Short-Circuit Protected
Operating Ambient Temperature Range ....... 0°C to 70°C
Junction Temperature .......................................... 125°C
Storage Temperature Range .................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
SW 1
GND 2
CTL 3
FB 4
8 VBAK
7 VCC
6 BACKUP
5 RESET
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 130°C/ W
ORDER PART
NUMBER
LTC1558CS8-3.3
LTC1558CS8-5
S8 PART MARKING
155833
15585
Consult factory for Industrial and Military grade parts.
SW 1
SW 2
PGND 3
GND 4
CTL 5
SHDN 6
FB 7
NC 8
TOP VIEW
16 VBAK
15 VBAK
14 VCC
13 BACKUP
12 RESET
11 RESET
10 NC
9 LOBAT
GN PACKAGE
S PACKAGE
16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/ W (GN)
TJMAX = 125°C, θJA = 110°C/ W (S)
ORDER PART
NUMBER
LTC1558CGN-3.3
LTC1558CGN-5
LTC1558CS-3.3
LTC1558CS-5
ELECTRICAL CHARACTERISTICS VBAT = 1.2V, TA = 0°C to 70°C unless otherwise noted.
SYMBOL PARAMETER
Battery Backup Switching
VCC
Operating Voltage Range
VBAT
Backup Battery Cell Voltage
VREF
Internal Reference Voltage
IVCC
Quiescent Supply Current (Note 2)
IBAT
Peak Inductor Current (Backup Mode)
IBAT(SHDN)
IVCC(SHDN)
VBAK(ON)
VBST(ON)
VBAK(OFF)
VBST(OFF)
VLOBAT
Battery Standby Current
Supply Current During Shutdown (Note 3)
Backup Request Trip Point
Boost Converter Assertion Trip Point
Backup Deassertion Trip Point
Boost Converter Deassertion Trip Point
Low VBAT Detect (Note 3)
CONDITIONS
LTC1558-3.3
LTC1558-5
Boost Converter in Low Current Mode (Note 7)
Boost Converter in High Current Mode (Note 7)
VCC = 0V
Voltage at VFB Relative to VREF
Voltage at VFB Relative to VREF
Voltage at VFB Relative to VREF
Voltage at VFB Relative to VREF
MIN TYP MAX
q 2.90
q 4.40
3.465
5.250
q 1.0 1.2 1.5
q 1.247 1.272 1.297
q
155 250
q 80 165 225
q 225 330 445
q
0.1 15
q
50
q – 10.5 – 7.5 – 5.5
q – 10.5 – 7.5 – 5.5
q –9 –6 –4
q – 10.5 – 7.5 – 5.5
q 0.95 1 1.05
UNITS
V
V
V
V
µA
mA
mA
µA
µA
%
%
%
%
V
2
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