L4938E STMicroelectronics, L4938E Datasheet - Page 4
![IC REG LDO DUAL 5V/ADV 16DIP](/photos/6/56/65691/497-20-soic__7_5mm_width__series_sml.jpg)
L4938E
Manufacturer Part Number
L4938E
Description
IC REG LDO DUAL 5V/ADV 16DIP
Manufacturer
STMicroelectronics
Datasheet
1.L4938E.pdf
(12 pages)
Specifications of L4938E
Regulator Topology
Positive Fixed and Adjustable
Voltage - Output
5V, 4.9 ~ 5.1 V
Voltage - Input
Up to 28V
Voltage - Dropout (typical)
0.2V @ 100mA, 0.3V @ 400mA
Number Of Regulators
2
Current - Output
100mA, 400mA
Current - Limit (min)
100mA, 450mA
Operating Temperature
-40°C ~ 150°C
Mounting Type
Through Hole
Package / Case
20-SOIC (7.5mm Width)
Polarity
Positive
Number Of Outputs
2
Output Type
Fixed
Output Voltage
5.1 V
Output Current
5 mA
Line Regulation
20 mV
Load Regulation
50 mV
Dropout Voltage (max)
0.2 V
Input Voltage Max
20 V
Maximum Operating Temperature
+ 150 C
Minimum Operating Temperature
- 40 C
Maximum Power Dissipation
875 mW
Mounting Style
Through Hole
Reference Voltage
1.23 V
Voltage Regulation Accuracy
2 %
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
497-3355-5
497-3914-5
497-3914-5
497-3914-5
497-3914-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
L4938E
Manufacturer:
ST
Quantity:
20 000
Part Number:
L4938ED
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
L4938ED013TR
Manufacturer:
OKISEMICONDUCTOR
Quantity:
2 854
Part Number:
L4938ED013TR
Manufacturer:
ST
Quantity:
20 000
Part Number:
L4938EDTR-E
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
L4938EPD
Manufacturer:
SILICON
Quantity:
9 700
Part Number:
L4938EPD13TR
Manufacturer:
ST
Quantity:
20 000
L4938E - L4938ED - L4938EPD
ELECTRICAL CHARACTERISTICS (Continued)
Note :
4) The reset threshold can be programmed continuously from typ 3.8V to 4.7V by changing a value of an external resistor from pin PR to GN
5) This is a minimum reset time according to the hysteresis of the comparator. Delay time starts with V
6) This is the nominal reset time depending on the discharging limit of C
7) The leakage of C
8) For transients exceeding 20V or -20V external protection is required at the Pins SI and EN as shown at Pin EN. The protection proposed will
4/12
ENABLE INPUT
RESET CIRCUIT
SENSE COMPARATOR
provide proper function for transients in the range of 200V. If the zener diode is omitted the external resistor should be raised to 200K
to limit the current to 1mA. Without the zener diode, the function 20V or -20V can not be guaranteed.
Delay time starts with V
increased. The external resistor should have more than 30K .
for stability: Cs
Symbol
I
I
V
I
t
EN HIGH
t
V
I
EN LOW
V
RD nom
SI HIGH
V
SI LOW
V
V
V
RD min
V
I
V
ENhyst
V
t
RESH
V
I
I
SOH
RESL
ENH
SITH
ENL
RTH
RR
SOL
CT
CT
SIT
RT
SI
Enable Input Low Voltage
(Output 2 Active)
Enable Input High Voltage
Enable Hysteresis
Enable Input Current Low
Enable Input Current High
Reset Theresold Voltage
(note4)
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
Reset Output High Leakage
current
Functional Range
Sense Threshold Voltage
Sense Threshold Hysteresis
Sense Output Low Voltage
Sense Output Leakage
Sense Input Current High
Sense Input Current Low
T
1 F, C01
must be less than 0.5mA (2V). If an external resistor between C
OUT1
Parameter
exceeding V
10 F, C02
RT
10 F, ESR
V
V
V
T
R
R
R
C
C
C
V
V
R
V
Falling Edge; T
Falling Edge; T
V
connected to 5V; V
V
V
V
V
V
5 (designed target) For details see application note.
J
EN
EN
EN
OUT1
OUT1
RES
SO
SI
SI
SI
PR
PR
PR
RES
RES
RES
RES
SI
OUT1
= 130 to 150 C;
= 0V
= 1.1 to 7V; T
= 1.1 to 7V; T
= 1.1 to 7V;
= 0
= 1.1 to 7V; T
= 5V; V
=
= 0
=
= 5V
= 47nF; t
= 47nF; (note 6)
= 47nF
= 10K
1.05V; R
< V
> V
Test Condition
1.5V
RT
RT
T
SI
(saturation voltage) and theupper threshold of the timer comparator.
to V
SO
r
J
J
J
1.5V
<130 C
<130 to 150 C
J
OUT1
J
30 s; (note 5)
=10K
<130 to 150 C
S
< 130 C;
<130 C
T
5V
and V
OUT1
is applied, the leakage current may be
Min.
3.65
1.08
1.05
-1.3
-20
1.4
-20
-10
4.5
-20
-10
-20
10
20
30
40
60
10
-1
-1
3
OUT1
exceeding V
V
Typ.
O1
1.16
1.16
100
3.8
30
60
60
50
30
-8
-1
-8
0
0
6
0
0
-0.3 V
RT
Max.
O1
3.95
1.24
1.29
120
100
140
150
0.7
0.4
0.4
20
60
10
15
20
60
10
-3
-3
1
1
1
1
1
-0.2
Unit
mV
mV
mA
mV
ms
ms
V
V
V
V
V
V
V
V
V
A
A
A
A
A
A
A
A
A
s