LTC1559-3.3/LTC1559-5
W W U W
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
BAK Output Current................... Short-Circuit Protected
Terminal Voltages
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
VCC ........................................................................ 6V
VBAK .................................................................... 12V
SW ...................................................................... 14V
All Other Pins .............................. –0.3V to VCC + 0.3V
SW Input Currents ............................................. 500mA
U
W U
PACKAGE/ORDER INFORMATION
TOP VIEW
ORDER PART
ORDER PART
SW
SW
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
V
V
NUMBER
NUMBER
BAK
BAK
CC
TOP VIEW
LTC1559CS8-3.3
LTC1559CS8-5
LTC1559CGN-3.3
LTC1559CGN-5
LTC1559CS-3.3
LTC1559CS-5
PGND
GND
CTL
1
2
3
4
8
7
6
5
SW
GND
CTL
PS
V
V
BAK
BACKUP
RESET
RESET
NC
CC
BACKUP
RESET
SHDN
PS
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SO
NC
LOBAT
155933
15595
TJMAX = 125°C, θJA = 130°C/ W
GN PACKAGE
S PACKAGE
16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/ W (GN)
T
JMAX = 125°C, θJA = 110°C/ W (S)
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS VBAT = 1.2V, TA = 0°C to 70°C unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Battery Backup Switching
V
V
Operating Voltage Range
LTC1559-3.3
LTC1559-5
●
●
2.900
4.400
3.5
5.5
V
V
CC
Backup Battery Cell Voltage
●
●
1.0
1.2
1.5
V
BAT
VCC
BAT
I
I
Quiescent Supply Current (Note 2)
Peak Inductor Current (Backup)
155
250
µA
Boost Converter in Low Current Mode (Note 7)
Boost Converter in High Current Mode (Note 7)
●
●
80
225
165
330
225
445
mA
mA
I
I
Battery Standby Current
V
= 0V
CC
●
●
0.1
15
50
µA
µA
BAT(SHDN)
VCC(SHDN)
Supply Current During Shutdown (Note 3)
V
V
Backup Request/Booster Assertion
CC
LTC1559-3.3
LTC1559-5
●
●
3.011 3.070 3.127
4.475 4.625 4.775
V
V
BAK(ON)
Trip Point (Note 4)
V
V
Backup Deassertion Trip Point
LTC1559-3.3
LTC1559-5
●
●
3.061 3.119 3.176
4.550 4.700 4.850
V
V
BAK(OFF)
CC
(Note 4)
V
V
Low V
Detect (Note 3)
BAT
●
0.95
1.00
1.05
V
LOBAT1
V
V
UVLO Trip Voltage (Note 4)
LTC1559-3.3
LTC1559-5
●
●
2.904 3.003 3.102
4.400 4.550 4.700
V
V
UVLO(ON)
CC
CC
V
UVLO Trip Voltage (Note 4)
LTC1559-3.3
LTC1559-5
●
●
3.061 3.119 3.176
4.550 4.700 4.850
V
V
UVLO(OFF)
2
Linear [ Linear ]
