參數(shù)資料
型號: LX7001CLP
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBCY3
文件頁數(shù): 8/9頁
文件大?。?/td> 137K
代理商: LX7001CLP
TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT
LX7001
PRODUCT DA T ABOOK 1996/1997
Copyright 1999
Rev. 1.2
6/99
8
P RODUCTION
D AT A
S HEET
TYPICAL APPLICATION CIRCUITS
FIGURE 13. — LOW VOLTAGE MICROPROCESSOR RESET.
A time delayed reset can be accomplished with the addition of C
DLY.
For systems with extremely fast power supply rise times (< 500ns) it
is recommended that the RC
DLY time constant be greater than 5.0s.
V
TH(MPU) is the microprocessor reset input threshold.
Overheating of the logic level power MOSFET due to insufficient gate
voltage can be prevented with the above circuit. When the input signal is
below the 4.3 volt threshold of the LX7001C, its output grounds the gate
of the L2 MOSFET.
FIGURE 15. — VOLTAGE MONITOR.
FIGURE 16. — MOSFET LOW VOLTAGE GATE DRIVE PROTECTION.
V
TH(MPU)
V
IN
1 -
t
DLY = R CDLY In
1
FIGURE 14. — SWITCHING THE LOAD OFF WHEN
BATTERY REACHES BELOW 4.3V.
POWER
SUPPLY
1.2 V
REF
MICROPROCESSOR
CIRCUIT
RESET
C
DLY
R
V
IN
1.2 V
REF
LOAD
RESET
V
IN
POWER
SUPPLY
1.2 V
REF
RESET
V
IN
1.0k
1.2 V
REF
RESET
V
IN
270
4.3V
V
CC
R
L
SMP60N03-10L
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LX7001IPKT 1-CHANNEL POWER SUPPLY SUPPORT CKT, PSSO3
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