L4937NPD
更新时间：2024-09-18 01:55:14
描述：DUAL 5V MULTIFUNCTION VOLTAGE REGULATOR
概述
规格参数
数据手册L4937NPD 概述
DUAL 5V MULTIFUNCTION VOLTAGE REGULATOR 5V双电压多功能调节器 线性稳压器IC
L4937NPD 规格参数
| 是否Rohs认证： | 符合 | 生命周期： | Obsolete |
| 零件包装代码： | SOIC | 包装说明： | POWER, MO-166, SO-20 |
| 针数： | 20 | Reach Compliance Code： | not_compliant |
| ECCN代码： | EAR99 | HTS代码： | 8542.39.00.01 |
| 风险等级： | 5.82 | Is Samacsys： | N |
| 可调性： | FIXED | 最大回动电压 1： | 0.4 V |
| 标称回动电压 1： | 0.3 V | 最大回动电压 2： | 0.6 V |
| 最大绝对输入电压： | 28 V | 最大输入电压： | 25 V |
| 最小输入电压： | 6 V | JESD-30 代码： | R-PDSO-G20 |
| JESD-609代码： | e3 | 长度： | 15.9 mm |
| 最大电网调整率： | 0.02% | 最大负载调整率： | 0.05% |
| 功能数量： | 1 | 输出次数： | 2 |
| 端子数量： | 20 | 工作温度TJ-Max： | 125 °C |
| 工作温度TJ-Min： | -40 °C | 最大输出电流 1： | 0.05 A |
| 最大输出电流 2： | 0.5 A | 最大输出电压 1： | 5.1 V |
| 最小输出电压 1： | 4.9 V | 标称输出电压 1： | 5 V |
| 标称输出电压 2： | 5 V | 封装主体材料： | PLASTIC/EPOXY |
| 封装代码： | SOP | 封装等效代码： | SOP20,.56 |
| 封装形状： | RECTANGULAR | 封装形式： | SMALL OUTLINE |
| 峰值回流温度（摄氏度）： | NOT SPECIFIED | 认证状态： | Not Qualified |
| 调节器类型： | FIXED POSITIVE MULTIPLE OUTPUT LDO REGULATOR | 座面最大高度： | 3.6 mm |
| 子类别： | Other Regulators | 表面贴装： | YES |
| 技术： | BIPOLAR | 端子面层： | Matte Tin (Sn) |
| 端子形式： | GULL WING | 端子节距： | 1.27 mm |
| 端子位置： | DUAL | 处于峰值回流温度下的最长时间： | NOT SPECIFIED |
| 最大电压容差： | 7% | 宽度： | 11 mm |
| Base Number Matches： | 1 |
L4937NPD 数据手册
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PDF下载L4937NPD
DUAL 5V MULTIFUNCTION VOLTAGE REGULATOR
.
.
.
.
STANDBYOUTPUTVOLTAGEPRECISION5V
± 2%
OUTPUT2TRACKEDTOTHESTANDBYOUT-
PUT
OUTPUT
2
DISABLE FUNCTION FOR
STANDBYMODE
VERY LOW QUIESCENT CURRENT, LESS
THAN 260µA, IN STANDBY MODE
OUTPUT CURRENTS : I01 = 50mA,I02 =500mA
VERY LOW DROPOUT (max 0.4V/0.6V)
OPERATINGTRANSIENT SUPPLY VOLTAGE
UP TO 40V
POWER-ON RESET CIRCUIT SENSING THE
STANDBYOUTPUT VOLTAGE
POWER-ON RESET DELAY PULSE DEFINED
BY THE EXTERNAL CAPACITOR
THERMALSHUTDOWNAND SHORTCIRCUIT
PROTECTIONS
PowerSO20
.
.
.
ORDERING NUMBER: L4937NPD
.
.
.
DESCRIPTION
TheL4937NPDis a monolithicintegrateddual volt-
age regulators with two very low dropout outputs
andadditionalfunctionssuchaspower-onresetand
input voltage sense. They are designed for supply-
ing microcomputer controlled systems specially in
automotiveapplications.
(top view)
PIN CONNECTION
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
GND
N.C.
VO2
GND
N.C.
VS
N.C.
VO1
VS
GND
N.C.
CT
GND
RESET
N.C.
N.C.
GND
EN
N.C.
GND
D95AT162A
June 2000
1/9
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
L4937NPD
BLOCK DIAGRAM
VS1
VO1
1.23V
REFERENCE
REG1
REG2
VS2
EN
VO2
1.23V
CT
2µ
RES
2.0V
GND
RESET
D95AT163
THERMAL DATA
Symbol
Parameter
Thermal Resistance Junction-Case
Value
1.5
Unit
Rthj-case
Max.
C/W
°
2/9
L4937NPD
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
28
Unit
V
VS
DC Supply Voltage
Transient Supply Voltage (T < 1s)
40
V
Tj, Tstg
IEN
Junction and Storage Temperature Range
–55 to 150
C
°
mA
Enable Input Current (VEN 0.3V)
1
±
≤
VEN
VRES
IRES
PD
Enable Input Voltage
Reset Output Voltage
Reset Output Current
Power Dissipation
VS
20
5
V
mA
mW
875
The circuit is ESD protected according to MIL–STD–883C.
Note :
APPLICATION CIRCUIT
VS1
VO1
CS
CO1
1.23V
REFERENCE
REG1
REG2
VO2
VS2
EN
CT
CT
1.23V
RES
2µ
2.0V
GND
RESET
D95AT164
CS ≥ 1µF ; C01 ≥ 6µF ; C02 ≥ 10µF, ESR < 10Ω at 10KHz
3/9
L4937NPD
ELECTRICAL CHARACTERISTICS (VS = 14V; –40°C ≤ TJ ≤ 125°C unless otherwise specified)
Symbol
VS
Parameter
Operating Supply Voltage
Standby Output Voltage
Test Conditions
Min.
Typ.
Max.
25
Unit
V
VO1
4.90
–25
5.00
5.10
V
6V ≤ VS ≤ 25V
1mA 50mA
I
≤
≤
O1
V
O2 - VO1 Output Voltage 2 Tracking Error
+25
mV
6V VS 25V
≤
≤
5mA
I
O2
500mA
≤
≤
Enable = LOW
VDP1
VIO1
Dropout Voltage 1
IO1 = 10mA
0.1
0.2
0.25
0.4
V
V
I
O1 = 50mA
Input to Output Voltage
Difference in Undervoltage
Condition
Vs = 4V, IO1 = 35mA
0.4
V
VDP2
VIO2
Dropout Voltage 2
IO1 = 100mA
0.2
0.3
0.3
0.6
V
V
I
O1 = 500mA
Input to Output Voltage
Difference in Undervoltage
Condition
Vs = 4.6V,IO1 = 350mA
0.6
V
VOL 1.2
Line Regulation
20
mV
6V ≤ VS ≤ 25V
IO1 = 1mA; IO2 = 5mA
VOLO1
VOLO2
ILIM1
Load Regulation 1
Load Regulation 2
Current Limit 1
25
50
mV
mV
1mA
5mA
I
50mA
≤
≤
≤
≤
O1
I
O2
500mA
VO1 = 4.5V
O1 = 0V (note 1)
55
25
100
50
200
100
mA
mA
V
ILIM2
IQSB
Current Limit 2
VO2 = 0V
550
1000
1700
mA
Quiescent Current Standby Mode
(output 2 disabled)
IO1 = 0.3mA;T < 100 C
°
J
VEN 2.4V
≥
210
340
290
850
A
µ
VS = 14V
VS = 3.5V
µA
IQ
Quiescent Current
IO1 = 50mA
30
mA
I
O1 = 500mA
ENABLE
VENL
Enable Input LOW Voltage
(output 2 active)
–0.3
1.5
V
VENH
VENhyst
IEN
Enable Input HIGH Voltage
Enable Hysteresis
2.4
30
7
V
75
200
mV
Enable Input Current
0V < VEN < 1.2V
2.5V < VEN < 7V
–10
–1
–1.5
0
–0.5
+1
A
µ
A
µ
4/9
L4937NPD
ELECTRICAL CHARACTERISTICS (continued)
RESET
Symbol
VRt
Parameter
Reset Low Threshold Voltage
Reset Threshold Hysteresis
Reset Pulse Delay
Test Conditions
Min.
Vo1 -0.4
50
Typ.
4.7
Max.
Unit
V
Vo1 -0.1
200
VRth
tRD
100
100
10
mV
ms
55
180
CT = 100nF;tR > 100µs
tRR
Reset Reaction Time
CT = 100nF
1
50
µs
VRL
Reset Output LOW Voltage
0.4
V
RRES = 10KΩ to V01
VS = 1.5V
ILRES
VCTh
Reset Output HIGH Leakage
Delay Comparator Threshold
VRES = 5V
1
µ
A
2.0
V
VCTh, hyst Delay Comparator Threshold
Hysteresis
100
mV
Note : 1: Foldback characteristic
FUNCTIONAL DESCRIPTION
The typical curve of the standbyoutputvoltage as a
functionof theinputsupplyvoltageis showninfig.1.
TheL4937NDis basedon the SGS-THOMSONMi-
croelectronicsmodularvoltageregulatorapproach.
Several out-standing features and auxiliary func-
tions areprovidedto meetthe requirementsof sup-
plying themicroprocessorsystemsusedinautomo-
tive applications.
The current consumption of the device (quiescent
current) is less than 260µA when output 2 is dis-
abled (standbymode). The dropoutvoltage is con-
trolled to reduce the quiescent current peak in the
undervoltage region and to improve the transient
responsein this region.
Furthermorethe device is suitablealso in other ap-
plications requiring two stabilized voltages.
Thequiescentcurrentisshowninfig.2as afunction
of the supply inputvoltage2.
The modular approach allows other features and
functionsto be realized easily when required.
OUTPUT2 VOLTAGE
STANDBY REGULATOR
The output2 regulatoruses the same outputstruc-
tureasthestandbyregulator,butratedforanoutput
current of 500mA.
The standby regulator uses an Isolated Collector
Vertical PNP transistor as the regulating element.
This structure allows a very low dropout voltage at
currents up to 50mA. The dropout operation of the
standby regulator is maintained down to 2V input
supply voltage. The output voltage is regulated up
tothetransientinputsupplyvoltageof40V.Thisfea-
ture avoids functionalinterruptions which could be
generatedby overvoltage pulses.
The output2 regulatorworks in tracking mode with
the standby output voltage as a reference voltage
when the output2.
The output 2 regulator can be switched off via the
Enable input.
OutputVoltagevs. Input Voltage.
Figure 1 :
5/9
L4937NPD
Figure 2 : QuiescentCurrent vs. Supply Voltage.
400µ
200µ
Figure 3 : ProgrammableOutput2 Voltage with External Resistors.
RESET CIRCUIT
Thereactiontimeof theresetcircuit dependsonthe
Theblockcircuitdiagramoftheresetcircuitisshown
infig.4. Theresetcircuitsupervisesthestandbyout-
put voltage. The reset threshold of 4.7V is defined
by the internal reference voltage and the standby
outputdivider.
discharge time limitation of the reset capacitor CT
and is proportionalto the value of CT.
The reaction time of the reset circuit increases the
noiseimmunity.In fact,if thestandbyoutputvoltage
drops below the reset threshold for a time shorter
thanthe reaction time tRR, no reset outputvariation
occurs. The nominal reset delay is generated for
standby output voltage drops longer than the time
necessary for the complete discharging of the ca-
pacitorCT. This time is typically equal to 50µs if
CT =100nF.Thetypicalresetoutputwaveformsare
shown in fig. 5.
The reset pulse delay time tRD, is defined by the
charge time of an externalcapacitorCT :
CT x 2V
tRD
=
2µA
6/9
L4937NPD
Block Diagram of the Reset Circuit.
Figure 4 :
Figure 5 : Typical Reset OutputWaveforms.
VOUT1
VINPUT
VOUT1
VRT +0.2V
VRT
1.5V
t
R
RESET
t
t
RD
RD
t
D95AT216
RR
7/9
L4937NPD
mm
inch
DIM.
OUTLINE AND
MECHANICAL DATA
MIN. TYP. MAX. MIN. TYP. MAX.
A
a1
a2
a3
b
3.6
0.3
3.3
0.1
0.142
0.012
0.130
0.004
0.021
0.013
0.630
0.386
0.570
0.1
0.004
0.000
0
0.4
0.23
0.53 0.016
0.32 0.009
c
D (1) 15.8
16
0.622
0.370
D1
E
9.4
9.8
13.9
14.5 0.547
e
e3
1.27
11.43
0.050
0.450
E1 (1) 10.9
E2
11.1 0.429
2.9
0.437
0.114
0.244
0.004
0.626
0.043
0.043
E3
G
H
h
5.8
0
6.2
0.1
0.228
0.000
15.5
15.9 0.610
1.1
JEDEC MO-166
L
0.8
1.1
0.031
N
S
T
10° (max.)
8° (max.)
10
0.394
PowerSO20
(1) ”D and F” do not include mold flash or protrusions.
- Moldflash or protrusions shall not exceed 0.15 mm (0.006”).
- Criticaldimensions: ”E”, ”G” and ”a3”
R
N
N
a2
A
c
a1
b
e
DETAIL B
DETAIL A
e3
E
DETAIL A
lead
H
D
slug
a3
DETAIL B
20
11
0.35
Gage Plane
- C -
S
SEATING PLANE
L
G
C
BOTTOM VIEW
(COPLANARITY)
E2
E1
T
E3
1
10
D1
PSO20MEC
h x 45
8/9
L4937NPD
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the conse-
quences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this
publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMi-
croelectronics products are not authorized for use as critical components in life support devices or systems without express written
approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
2000 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco -
Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
9/9
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| L4938ND013TR | STMICROELECTRONICS | DUAL OUTPUT, FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, PDSO20, SOP-20 | 获取价格 |
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