ETC1 LND4808 400ma low dropout voltage regulator Datasheet

DATA SHEET
LND48XX
400mA Low Dropout Voltage Regulators
GENERAL DESCRIPTION
FEATURES
This series of fixed-voltage monolithic
micropower voltage regulators is designed for a
wide range of applications. This device is an
excellent choice for use in battery-powered
application. Furthermore, the quiescent current
increases only slightly at dropout, which
prolongs battery life.
This series of fixed-voltage regulators features
very low quiescent current(100mA Typ.) and
very low drop output voltage (Typ. 60mV at light
load and 420mV at 400mA). This includes a
tight initial tolerance of 0.5%typ. Extremely good
load and line regulation of 0.05% typ., and very
low output temperature coefficient. This series
of fixed-voltage regulators is offered in 3-pin TO220 package compatible with other fixed voltage
regulators. Adjust model is offered in 5-pin TO220 package and fixed model with shutdown
input is offered in 4-pin TO-220 package.
PIN DIAGRAM
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APPLICATIONS
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Output
Common
Input
400mA output within 2% over
temperature
Very low quiescent current
Low dropout voltage (420mV Typ)
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Unregulated DC input can withstand –
20V reverse battery and +60V positive
transients
Direct replacement for SGS-ThomsonL48XX Series, but has lower ground
current, higher accuracy of output
voltage and extremely tight load and
line regulation. The 5 pin version
(adjust model) and 4 pin version (fixed
model) have a shutdown input.
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High-efficiency linear regulator
Battery powered systems
Portable/palm top/ notebook
Computers
Portable consumer equipment
Portable instrumentation
Automotive Electronics
SMPS Post Regulator
TO – 220 Package
• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •
LND48XX
ABSOLUTE MAXIMUM RATINGS
Power Dissipation
Internally Limited
Lead Temperature(Soldering, 5 seconds)
260ºC
Storage Temperature Range
-65ºC to +150ºC
Operating Junction Temperature Range
-55ºC to +150ºC
Input Supply Voltage
-20V to +35V
Continuous total dissipation at 25º C free air temperature
2W
Continuous total dissipation at (or below) 25º C case temperature
15W
DEVICE SELECTION GUIDE
Vout , VOLTS
3.3V*
5V
8V
8.5V
9V
10V
12V
15V
Adj.
Device
LND4833
LND4805
LND4808
LND4885
LND4809
LND4810
LND4812
LND4815
LND48-adj
* Other fixed versions are also available Vout=2.0 V to 5.0V
Please Consult Linear Dimensions for Information.
• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •
LND48XX
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage
Output Voltage
Input Supply Voltage
Output Voltage Temperature
Coefficient
Line Regulation (Note 2)
Load Regulation(Note 2)
Dropout Voltage(Note 4)
Ground Current (Note 5)
Dropout Ground
Current(Note 5)
Current Limit
Thermal Regulation (Note 6)
Output Noise, 10Hz to
100KHz IL = 100mA
Ripple Rejection Ratio
Adjust model
Reference Voltage
Reference Voltage
Feedback Pin Bias Current
Reference Voltage
Temperature Coefficient
Feedback Pin Bias Current
Temperature coefficient
Shutdown Input
Input Logic Voltage
Shutdown Pin Input Current
CONDITIONS
-25º C<=TJ <=85ºC
Full Operating Temperature
1mA<= IL <=400mA, TJ
<=Tjmax
TYP
MAX
0.985 |Vo|
0.98 |Vo|
MIN
Vo
1.015 |Vo|
1.02 |Vo|
0.975 |Vo|
Vo
1.025 |Vo|
UNITS
V
26
(Note 1)
50
150
ppm/ºC
13V<=Vin <= 26V (Note 3)
1mA<= IL <=400mA
IL =150mA
IL =400mA
IL =100µA
IL =150µA
IL =400µA
0.1
0.1
200
420
100
12
30
0.4
0.3
400
700
200
20
50
%
%
µA
mA
mA
Vin=Vout-0.5V IL =100µA
110
220
µA
Vout=0
350
0.05
500
350
120
500
0.2
mA
%/W
CL=2.2µF
CL=3.3µF
CL=33µF
IO =350mA,f=120Hz,
Co=100µF, VIN=Vo+3V+2VPP
Over Temperature (Note 7)
µV RMS
60
1.21
1.185
dB
1.235
1.26
1.285
40
20
(Note 1)
Low(Regulator ON)
High (Regulator OFF)
VS = 2.4V
VS = 26V
mV
V
nA
50
ppm/ºC
0.1
nA/ºC
1.3
0.7
V
2
30
450
50
600
(Note 8)
Regulator Output Current in
Shutdown
5.0V<=Vout<15.0V
10
3.3V<=Vout<5.0 V
20
2.0V<=Vout<3.3V
30
µA
• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •
LND48XX
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total
temperature range.
Note 2: Regulations are measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in
output voltage due to heating effects are covered under the specification for thermal regulation.
Note 3: Line regulation is tested at 150ºC for IL =5mA. For IL =100µA and TJ =125ºC, line regulation is guaranteed by design to
0.2%. For LND4815 16V<= Vin <=26V.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal
value measured at 1V differential.
Note 5: Group pin current is the regulator quiescent current. The total current drawn from the source is the sum of the ground
pin current and output load current.
Note 6: Thermal Regulation is the change in the output voltage at a time T after a change in power dissipation, excluding load
or line regulation effects. Specifications are for a 200mA load pulse (3W pulse) for T=10ms.
Note 7: Vref <=Vout <=(Vin – 1V), 2.3V<=Vin <=26V,100µA <= IL <=400mA, TJ <= Tjmax.
Note 8: Vshutdown >=2V, Vin <=26V, Vout =0v.
BLOCK DIAGRAM and TYPICAL APPLICATIONS
Unregulated DC
+
INPUT
OUTPUT
5V
<= 400mA
+
ERROR
AMPLIFIER
1µF
+
+
6.8µF
+
1.23 V
Reference
GROUND
Fig 1 : Fixed Regulator
Unregulated DC
7
+
8
FEEDBACK
Vout 1.2 --> 24 V
400mA Max
1
R1
OUTPUT
INPUT
1 µF
+
6.8µF
R2
+
-
V Ref 1.23V
ERROR
AMPLIFIER
3
From
CMOS
or
TTL
SHUTDOWN
Off
On
+
1.23 V
Reference
GROUND
V
=V
(1+ R1/R2)
OUT
REF
Fig 2 : Adjustable Regulator
• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •
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