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參數(shù)資料
| 型號： | L4938ND |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DUAL MULTIFUNCTION VOLTAGE REGULATOR |
| 中文描述： | 多功能雙電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 93K |
| 代理商： | L4938ND |
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
L4938N/ND
L4938NPD
April 1999
DUAL MULTIFUNCTIONVOLTAGE REGULATOR
.
STANDBYOUTPUTVOLTAGEPRECISION5V
±
2%
.
OUTPUT2TRACKEDTOTHESTANDBYOUT-
PUT
.
OUTPUT
STANDBYMODE
.
VERY LOW QUIESCENT CURRENT, LESS
THAN 250
μ
A,IN STANDBYMODE
.
OUTPUT 2 VOLTAGESETTABLE FROM 5 TO
VERYLOWDROPOUT (max 0.4V/0.6V)
.
OPERATINGTRANSIENT SUPPLYVOLTAGE
UP TO 40V
.
POWER-ON RESET CIRCUIT SENSING THE
STANDBYOUTPUT VOLTAGE
.
POWER-ON RESET DELAY PULSEDEFINED
BY THE EXTERNALCAPACITOR
.
EARLYWARNINGOUTPUTFORSUPPLYUN-
DERVOLTAGE
.
THERMALSHUTDOWNANDSHORTCIRCUIT
PROTECTIONS
2
DISABLE
FUNCTION
FOR
20V
.
OUTPUTCURRENTS: I
01
= 50mA,I
02
=500mA
PowerDIP
(12+2+2)
ORDERING NUMBERS:
L4938N (PDIP)
L4938ND(SO)
L4938NPD (PSO20)
DESCRIPTION
The L4938Nis a monolithicintegrateddualvoltage
regulatorswithtwoverylowdropoutoutputsandad-
ditionalfunctionssuchas power-onresetand input
voltagesense.Theyaredesignedfor supplyingmi-
crocomputer controlled systems specially in auto-
motiveapplications.
PIN CONNECTION
(top view)
SO20
(12+4+4)
N.C.
CT
EN
GND
GND
SO
RES
1
3
2
4
5
6
7
V
O2
ADJ
GND
V
O2
GND
V
S2
V
S1
SI
16
15
14
13
12
10
11
D95AT156
V
O1
8
9
POWERDIP
N.C.
C7
EN
GND
GND
GND
GND
RES
SO
V
S1
V
S2
GND
GND
GND
GND
V
O2
V
O2
ADJ
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
V
O1
SI
D93AT004
SO20
PowerSO20
GND
N.C.
N.C.
V
S2
V
S1
SI
N.C.
CT
EN
N.C.
GND
10
8
9
7
6
5
4
3
2
13
14
15
16
17
19
18
20
12
1
11
GND
D95AT169A
N.C.
RESET
V
O1
SO
ADJ
V
O2
N.C.
GND
PowerSO20
1/12
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