參數(shù)資料
型號(hào): LTC1235CN
廠商: LINEAR TECHNOLOGY CORP
元件分類: 電源管理
英文描述: Microprocessor Supervisory Circuit
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP16
封裝: 0.300 INCH, PLASTIC, DIP-16
文件頁(yè)數(shù): 3/16頁(yè)
文件大?。?/td> 295K
代理商: LTC1235CN
3
LTC1235
PARAMETER
Battery Backup Switching
Operating Voltage Range
V
CC
V
BATT
V
OUT
Output Voltage
CONDITONS
MIN
TYP
MAX
UNITS
4.75
2.00
5.50
4.25
V
I
OUT
= 1mA
V
CC
– 0.05
V
CC
– 0.1
V
CC
– 0.5
V
CC
– 0.005
V
CC
– 0.005
V
CC
– 0.25
V
G
I
OUT
= 50mA
V
CC
> Reset Voltage Threshold
Logic Low
Logic High
BACKUP Input Threshold
0.8
V
2.0
BACKUP Pullup Current (Note 4)
V
OUT
in Battery Backup Mode (Note 5)
V
OUT
in Battery Saving Mode (Note 5)
3
μ
A
I
OUT
= 250
μ
A, V
CC
< V
BATT
V
CC
< V
BATT
1M
Pulldown on V
OUT
I
OUT
50mA
V
BATT
– 0.1
V
BATT
– 0.02
0
V
V
V
CC
Supply Current (excluding I
OUT
)
0.6
0.6
0.04
0.04
1.5
2.5
1
5
+0.02
+0.10
mA
G
Battery Supply Current in Battery Backup Mode and
Battery Saving Mode (Note 5)
Battery Standby Current
(+ = Discharge, – = Charge)
Battery Switchover Threshold
V
CC
– V
BATT
Battery Switchover Hysteresis
BATT ON Output Voltage (Note 6)
BATT ON Output Short Circuit Current (Note 6)
V
CC
= 0V, V
BATT
= 2.8V
μ
A
G
5.5 > V
CC
> V
BATT
+ 0.2V
–0.1
–1.0
μ
A
G
Power Up
Power Down
70
50
20
mV
mV
I
SINK
= 3.2mA
BATT ON = V
OUT
Sink Current
BATT ON = 0V Source Current
0.4
V
35
1
mA
μ
A
0.5
25
Push-Button Reset
PB RST Input Threshold
Logic Low
Logic High
0.8
V
2.0
40
PB RST Input Low Time (Notes 4, 7)
Reset and Watchdog Timer
Reset Voltage Threshold
Reset Threshold Hysteresis
Reset Active Time
G
ms
G
4.5
4.65
40
200
200
1.6
1.6
1
8
4.75
V
mV
ms
V
CC
= 5V
160
140
1.2
1.0
240
280
2.00
2.25
G
Watchdog Time-out Period
V
CC
= 5V
sec
G
Reset Active Time PSRR
Watchdog Time-out Period PSRR
Minimum WDI Input Pulse Width
RESET Output Voltage At V
CC
= 1V
RESET and LOW LINE Output Voltage
(Note 6)
ms/V
ms/V
V
IL
= 0.4V, V
IH
= 3.5V
I
SINK
= 10
μ
A, V
CC
= 1V
I
SINK
= 1.6mA, V
CC
= 4.25V
I
SOURCE
= 1
μ
A, V
CC
= 5V
G
200
ns
mV
4
200
0.4
V
3.5
ELECTRICAL C
V
CC
= Full Operating Range, V
BATT
= 2.8V, Backup = No Connection, T
A
= 25
°
C, unless otherwise noted.
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