參數(shù)資料
型號： L4938E
廠商： 意法半導(dǎo)體
英文描述： ADVANCED VOLTAGE REGULATOR
中文描述： 高級穩(wěn)壓器
文件頁數(shù)： 4/12頁
文件大?。?/td> 101K
代理商： L4938E
ELECTRICALCHARACTERISTICS
(Continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
ENABLE INPUT
V
ENL
Enable Input Low Voltage
(Output 2 Active)
Enable Input High Voltage
Enable Hysteresis
Enable Input Current Low
Enable Input Current High
-20
1
V
V
ENH
V
ENhyst
I
EN LOW
I
EN HIGH
1.4
20
-20
-1
-10
20
60
-3
1
10
V
30
-8
0
0
mV
μ
A
μ
A
μ
A
V
EN
= 0
V
EN
= 1.1 to 7V; T
J
< 130
°
C;
V
EN
= 1.1 to 7V;
T
J
= 130 to 150
°
C;
RESETCIRCUIT
V
RT
Reset Theresold Voltage
(note4)
R
PR
=
∞
R
PR
= 0
R
PR
=
∞
C
RES
= 47nF; t
r
≤
30
μ
s; (note 5)
C
RES
= 47nF; (note 6)
C
RES
= 47nF
V
OUT1
< V
RT
4.5
3.65
30
40
60
10
3
V
O1
-0.3 V
O1
-0.2
3.8
60
60
100
50
6
V
V
3.95
120
100
140
150
15
V
RTH
t
RD min
t
RD nom
t
RR
I
CT
Reset Theresold Hysteresis
Reset Pulse Delay
Reset Pulse Delay
Reset Reaction Time
Pull Down Capability of the
Discharge circuit
Charge Current
Reset Output Low Voltage
mV
ms
ms
μ
s
mA
I
CT
V
OUT1
> V
RT
R
RES
= 10K
to V
OUT1
V
OUT1
≥
1.5V
V
RES
= 5V
-1.3
-1
0.7
0.4
μ
A
V
V
RESL
V
RESH
Reset Output High Leakage
current
1
μ
A
SENSECOMPARATOR
V
SI
V
SIT
Functional Range
Sense Threshold Voltage
-20
1.08
1.05
10
20
1.24
1.29
60
0.4
V
V
V
Falling Edge; T
J
<130
°
C
Falling Edge; T
J
<130
to 150
°
C
1.16
1.16
30
V
SITH
V
SOL
Sense Threshold Hysteresis
Sense Output Low Voltage
mV
V
V
SI
≤
1.05V; R
SO
=10K
connected to 5V; V
S
≥
5V
V
SO
= 5V; V
SI
≥
1.5V
V
SI
= 1.1 to 7V; T
J
<130
°
C
V
SI
= 1.1to 7V; T
J
<130
to 150
°
C
V
SI
= 0V
I
SOH
I
SI HIGH
Sense Output Leakage
Sense Input Current High
1
1
μ
A
μ
A
μ
A
μ
A
-1
-10
-20
0
0
-8
10
-3
I
SI LOW
Sense Input Current Low
Note :
4) The reset threshold can be programmed continuously from typ 3.8V to 4.7V by changing a valueof an external resistor frompin PR to GN
5) This is a minimum reset timeaccording to the hysteresis of the comparator. Delay time starts with V
OUT1
exceeding V
RT
6) This is thenominal reset time depending on thedischarging limit of C
T
(saturationvoltage) and theupper threshold ofthe timer comparator.
Delay time starts with V
OUT1
exceeding V
RT
7) The leakage of C
T
must be less than0.5mA (2V). Ifan externalresistor between C
T
and V
OUT1
is applied, the leakage current may be
increased. The external resistor should have more than 30K
.
for stability: Cs
≥
1
μ
F, C01
≥
10
μ
F, C02
≥
10
μ
F, ESR
≤
5
(designed target) For details see application note.
8) For transientsexceeding 20V or -20V externalprotection is required at thePins SIand EN as shown at Pin EN. The protectionproposed will
provide proper functionfor transients in the range of
±
200V. If the zener diode is omitted the external resistor should be raised to200K
to limit the current to 1mA. Withoutthe zener diode, the function 20V or -20V can not be guaranteed.
L4938E - L4938ED - L4938EPD
4/12
相關(guān)PDF資料
PDF描述
L4938ED ADVANCED VOLTAGE REGULATOR
L4938EPD ADVANCED VOLTAGE REGULATOR
L4938NPD DUAL MULTIFUNCTION VOLTAGE REGULATOR
L4938N DUAL MULTIFUNCTION VOLTAGE REGULATOR
L4938ND DUAL MULTIFUNCTION VOLTAGE REGULATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L4938ED 功能描述:低壓差穩(wěn)壓器 - LDO Dual 5V Very LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
L4938ED013TR 功能描述:低壓差穩(wěn)壓器 - LDO Dual 5V Very LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
L4938EDTR-E 制造商:STMicroelectronics 功能描述:PTS SMARTPOWER - Tape and Reel 制造商:STMicroelectronics 功能描述:Advanced Voltage Reg 3.8V to 4.7V 65uA
L4938EPD 功能描述:低壓差穩(wěn)壓器 - LDO Dual 5V Very LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
L4938EPD13TR 功能描述:低壓差穩(wěn)壓器 - LDO Dual 5V Very LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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