DATA SHEET
LND48XX
400mA Low Dropout Voltage Regulators
GENERAL DESCRIPTION
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 TO-
220 package compatible with other fixed voltage
regulators. Adjust model is offered in 5-pin TO-
220 package and fixed model with shutdown
input is offered in 4-pin TO-220 package.
FEATURES
•
•
•
•
•
•
•
•
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-Thomson-
L48XX 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.
APPLICATIONS
•
•
•
High-efficiency linear regulator
Battery powered systems
Portable/palm top/ notebook
Computers
Portable consumer equipment
Portable instrumentation
Automotive Electronics
SMPS Post Regulator
PIN DIAGRAM
Output
Common
Input
•
•
•
•
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
Lead Temperature(Soldering, 5 seconds)
Storage Temperature Range
Operating Junction Temperature Range
Input Supply Voltage
Continuous total dissipation at 25º C free air temperature
Continuous total dissipation at (or below) 25º C case temperature
Internally Limited
260ºC
-65ºC to +150ºC
-55ºC to +150ºC
-20V to +35V
2W
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 I
L
= 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<=T
J
<=85ºC
Full Operating Temperature
1mA<= I
L
<=400mA, T
J
<=Tjmax
(Note 1)
13V<=Vin <= 26V (Note 3)
1mA<= I
L
<=400mA
I
L
=150mA
I
L
=400mA
I
L
=100µA
I
L
=150µA
I
L
=400µA
Vin=Vout-0.5V I
L
=100µA
Vout=0
C
L
=2.2µF
C
L
=3.3µF
C
L
=33µF
I
O
=350mA,f=120Hz,
Co=100µF, V
IN
=Vo+3V+2V
PP
MIN
0.985 |Vo|
0.98 |Vo|
0.975 |Vo|
TYP
Vo
Vo
MAX
1.015 |Vo|
1.02 |Vo|
1.025 |Vo|
26
50
0.1
0.1
200
420
100
12
30
110
350
0.05
500
350
120
60
1.21
1.185
1.235
20
(Note 1)
50
0.1
Low(Regulator ON)
High (Regulator OFF)
V
S
= 2.4V
V
S
= 26V
(Note 8)
Regulator Output Current in
Shutdown
5.0V<=Vout<15.0V
3.3V<=Vout<5.0 V
2.0V<=Vout<3.3V
10
20
30
µA
1.3
2
30
450
50
600
0.7
1.26
1.285
40
150
0.4
0.3
400
700
200
20
50
220
500
0.2
ppm/ºC
%
%
mV
µA
mA
mA
µA
mA
%/W
µV RMS
dB
V
UNITS
Over Temperature (Note 7)
V
nA
ppm/ºC
nA/ºC
V
•
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 I
L
=5mA. For I
L
=100µA and T
J =
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 <= I
L
<=400mA, T
J
<= T
jmax.
Note 8: Vshutdown >=2V, Vin <=26V, Vout =0v.
BLOCK DIAGRAM and TYPICAL APPLICATIONS
Unregulated DC
+
INPUT
OUTPUT
5V
<= 400mA
+
-
ERROR
AMPLIFIER
1
µ
F
+
+
6.8
µ
F
+
1.23 V
Reference
GROUND
Fig 1 : Fixed Regulator
Unregulated DC
7
+
FEEDBACK
INPUT
8
1
OUTPUT
R1
1
µ
F
Vout 1.2 --> 24 V
400mA Max
+
6.8
µ
F
+
-
From
CMOS
or
TTL
Off
On
R2
ERROR
AMPLIFIER
V
Ref
1.23V
3
SHUTDOWN
+
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
•
京公网安备 11010802033920号
EEWORLD
