參數(shù)資料
型號(hào): L9952GXPTR
廠商: STMICROELECTRONICS
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
封裝: LEAD FREE, SSO-36
文件頁(yè)數(shù): 31/68頁(yè)
文件大?。?/td> 859K
代理商: L9952GXPTR
L9952GXP
Electrical characteristics
Doc ID 13518 Rev 5
7.6
Reset generator (V1 supervision)
The voltages are referred to GND and currents are assumed positive, when the current
flows into the pin. 5.25V < VS = 18V; Tj = -40 to 130 °C, unless otherwise specified.
7.7
Watchdog
6V < VS < 18V; 4.8V < V1 < 5.2V; Tj = -40 to 130 °C, unless otherwise specified
Table 15.
Reset generator
Item
Symbol
Parameter
Test condition
Min.
Typ. Max. Unit
7.6.1
VRT1
Reset threshold voltage1
VS, VV1 inc. /
decreasing
4.5
4.63
4.75
V
7.6.2
VRT2
Reset threshold voltage2
VS, VV1 inc. /
decreasing
4.25
4.37
4.5
V
7.6.3
VRESET
Reset pin low output
voltage
V1 > 1V,
IRESET = 1mA
0,2
0,4
V
7.6.4
RRESET
Reset pull up int. resistor
60
110
204
k
Ω
7.6.5
tRR
Reset reaction time
@Iload = 1mA
6
40
s
7.6.6
V1 under-voltage filter time
16
s
Table 16.
Watchdog (1)
1.
Item
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
7.7.1
tLW
Long open window
48,75
65
81,25
ms
7.7.2
tCW
Closed window
4.5
6
7.5
ms
7.7.3
tOW
Open window
7.5
10
12.5
ms
7.7.4
tWDR
Watchdog reset pulse time
1.5
2
2. 5
ms
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