LTC1559CS-3.3 데이터 시트보기 (PDF) - Linear Technology
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LTC1559CS-3.3 Datasheet PDF : 20 Pages
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LTC1559-3.3/LTC1559-5
ELECTRICAL CHARACTERISTICS VBAT = 1.2V, TA = 0°C to 70°C unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
UVLO Reset Monitor
VLOBAT2 VBAT UVLO Trip Voltage (Note 5)
Backup Battery Charger
ICHGF
ICHGT
Battery Charge Current During Fast Recharge
User-Programmable Trickle Charge
Current Range
QRECH
Fast Recharge Factor (Note 6)
QTRK
Nominal Trickle Charge Multiplier Factor
VCTL(CLAMP) CTL Clamp Voltage in Trickle Mode
Push-Button Reset
ICHGT = 1mA
ICHGT = 1mA
VCTL
CTL Input Threshold
tCTL
CTL Input Low Time (Debounce Time)
Reset Timer
tHRESET
tRST
VRST1
VRST
ISC
Push-Button Duration for Hard Reset
RESET Pulse Width
RESET Output Voltage
RESET Output Voltage
RESET Output Current
Short-Circuit Current
PS Comparator
VCTL Low for < tHRESET (Soft Reset)
VCTL Low for > tHRESET (Hard Reset)
VCC = 1V, ISINK = 10µA
VCC = 4.25V, ISINK = 1.6mA
Output Source Current VCC = 3.3V
Output Source Current VCC = 5V
Output Sink Current VCC = 3.3V
Output Sink Current VCC = 5V
VHYST
Comparator Threshold Hysteresis
TA = 25°C
Internal VCC Monitor Comparator
tr
UVLO, Comparator Propagation Delay (Rising)
Shutdown Pin (Note 3)
VSHDN
ISHDN
SHDN Input Threshold
SHDN Pin Bias Current
Logic Low, VIL
Logic High, VIH
VCC = 5V, VSHDN = 0V
MIN TYP MAX UNITS
q 0.85 0.9 0.95
V
q 11 16 21
mA
q 0.05
2
mA
1.35 1.6 1.85
C/C
q
8
10 12
A/A
q 0.45 0.5 0.55
V
250
mV
20 26
ms
1.10 1.8 3.4
sec
q 50 80 150
µs
q 115 185 345
ms
q
5 200
mV
q
0.1 0.4
V
10
mA
20
mA
20
mA
40
mA
90
mV
7.5
µs
q
q
2
0.8
V
V
q
8
15
µA
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2: Quiescent current is measured during push-button reset.
Note 3: Only applies to 16-pin version.
Note 4: Although the VBAK(ON), VBAK(OFF), VUVLO(ON) and VUVLO(OFF)
threshold voltages have a specification tolerance, they are guaranteed by
design and tested in production never to overlap.
Note 5: Low cell voltage reset is only triggered when 0.25V < VCTL < 0.9V
for at least 20µs while in backup mode.
Note 6: Fast recharge factor is defined as the ratio of charge replenished to
the NiCd battery during fast recharge to the charge withdrawn from the
NiCd battery during backup.
Note 7: The LTC1559 switches automatically between the low and high
operating current levels. See Applications Information for more details.
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