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參數(shù)資料
| 型號： | LTC693IS#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | PLASTIC, SOL-16 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 308K |
| 代理商： | LTC693IS#PBF |
4
LTC692/LTC693
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 the device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: For military temperature range, consult the factory.
Note 4: The output pins of BATT ON, LOW LINE, PFO, WDO, RESET and
RESET have weak internal pull-ups of typically 3
A. However, external
pull-up resistors may be used when higher speed is required.
VCC = Full Operating Range, VBATT = 2.8V, TA = 25°C, unless otherwise noted.
ELECTRICAL C
C
HARA TERISTICS
Note 5: The LTC692/LTC693 have minimum reset active times of 140ms
(200ms typically). The reset active time of the LTC693 can be adjusted
(see Table 2 in Applications Information Section).
Note 6: The external clock feeding into the circuit passes through the
oscillator before clocking the watchdog timer (See BLOCK DIAGRAM).
Variation in the time-out period is caused by phase errors which occur
when the oscillator divides the external clock by 64. The resulting variation
in the time-out period is 64 clocks plus one clock of jitter.
Note 7: The input pins of CE IN, OSC IN and OSC SEL have weak internal
pull-ups which pull to the supply when the input pins are floating.
PARAMETER
CONDITONS
MIN
TYP
MAX
UNITS
RESET, RESET, WDO, LOW LINE
Output Source Current
1
3
25
A
Output Short-Circuit Current (Note 4)
Output Sink Current
25
mA
WDI Input Threshold
Logic Low
0.8
V
Logic High
3.5
V
WDI Input Current
WDI = VOUT
q
450
A
WDI = 0V
q
–50
– 8
A
Power Fail Detector
PFI Input Threshold
VCC = 5V
q
1.25
1.3
1.35
V
PFI Input Threshold PSRR
0.3
mV/V
PFI Input Current
±0.01
±25
nA
PFO Output Voltage (Note 4)
ISINK = 3.2mA
0.4
V
ISOURCE = 1A
3.5
V
PFO Short Circuit Source Current
PFI = HIGH, PFO = 0V
1
3
25
A
(Note 4)
PFI = LOW, PFO = VOUT
25
mA
PFI Comparator Response Time (falling)
VIN = –20mV, VOD = 15mV
2
s
PFI Comparator Response Time (rising)
VIN = 20mV, VOD = 15mV
40
s
(Note 4)
with 10k
Pull-Up
8
s
Chip Enable Gating
CE IN Threshold
VIL
0.8
V
VIH
2.0
V
CE IN Pullup Current (Note 7)
3
A
CE OUT Output Voltage
ISINK = 3.2mA
0.4
V
ISOURCE = 3.0mA
VOUT – 1.50
V
ISOURCE = 1A, VCC = 0V
VOUT – 0.05
V
CE Propagation Delay
VCC = 5V, CL = 20pF
20
35
ns
q
20
45
ns
CE OUT Output Short Circuit Current
Output Source Current
30
mA
Output Sink Current
35
mA
Oscillator
OSC IN Input Current (Note 7)
±2
A
OSC SEL Input Pull-Up Current (Note 7)
5
A
OSC IN Frequency Range
OSC SEL = 0V
q
0
250
kHz
OSC IN Frequency with External Capacitor
OSC SEL = 0V, COSC = 47pF
4
kHz
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