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LND4833

更新时间：2024-09-18 07:31:53
品牌：LINEAR_DIMENSIONS
描述：400mA Low Dropout Voltage Regulators

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LND4833 概述

400mA Low Dropout Voltage Regulators 400毫安低压差稳压器

LND4833 数据手册

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DATA SHEET  
LND48XX  
400mA Low Dropout Voltage Regulators  
GENERAL DESCRIPTION  
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.  
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.  
•
APPLICATIONS  
•
•
•
High-efficiency linear regulator  
Battery powered systems  
Portable/palm top/ notebook  
Computers  
PIN DIAGRAM  
•
•
•
•
Portable consumer equipment  
Portable instrumentation  
Automotive Electronics  
SMPS Post Regulator  
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  
Internally Limited  
260ºC  
Lead Temperature(Soldering, 5 seconds)  
Storage Temperature Range  
-65ºC to +150ºC  
-55ºC to +150ºC  
-20V to +35V  
2W  
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  
15W  
DEVICE SELECTION GUIDE  
Vout , VOLTS  
Device  
LND4833  
LND4805  
LND4808  
LND4885  
LND4809  
LND4810  
LND4812  
LND4815  
LND48-adj  
3.3V*  
5V  
8V  
8.5V  
9V  
10V  
12V  
15V  
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  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
-25º C<=TJ <=85ºC  
Full Operating Temperature  
0.985 |Vo|  
0.98 |Vo|  
1.015 |Vo|  
1.02 |Vo|  
Output Voltage  
Vo  
V
1mA<= IL <=400mA, TJ  
<=Tjmax  
Output Voltage  
0.975 |Vo|  
Vo  
1.025 |Vo|  
26  
Input Supply Voltage  
Output Voltage Temperature  
Coefficient  
(Note 1)  
50  
150  
ppm/ºC  
Line Regulation (Note 2)  
Load Regulation(Note 2)  
13V<=Vin <= 26V (Note 3)  
1mA<= IL <=400mA  
IL =150mA  
IL =400mA  
IL =100µA  
0.1  
0.1  
200  
420  
100  
12  
0.4  
0.3  
400  
700  
200  
20  
%
%
Dropout Voltage(Note 4)  
mV  
µA  
mA  
mA  
Ground Current (Note 5)  
IL =150µA  
IL =400µA  
30  
50  
Dropout Ground  
Current(Note 5)  
Current Limit  
Vin=Vout-0.5V IL =100µA  
Vout=0  
110  
220  
µA  
350  
0.05  
500  
350  
120  
500  
0.2  
mA  
%/W  
Thermal Regulation (Note 6)  
CL=2.2µF  
CL=3.3µF  
CL=33µF  
IO =350mA,f=120Hz,  
Co=100µF, VIN=Vo+3V+2VPP  
Output Noise, 10Hz to  
100KHz IL = 100mA  
µV RMS  
dB  
Ripple Rejection Ratio  
60  
Adjust model  
Reference Voltage  
Reference Voltage  
Feedback Pin Bias Current  
Reference Voltage  
Temperature Coefficient  
1.21  
1.185  
1.235  
1.26  
1.285  
40  
V
nA  
Over Temperature (Note 7)  
(Note 1)  
20  
50  
ppm/ºC  
Feedback Pin Bias Current  
Temperature coefficient  
0.1  
nA/ºC  
Shutdown Input  
Low(Regulator ON)  
High (Regulator OFF)  
VS = 2.4V  
1.3  
0.7  
Input Logic Voltage  
V
2
30  
450  
50  
600  
Shutdown Pin Input Current  
VS = 26V  
(Note 8)  
µA  
5.0V<=Vout<15.0V  
3.3V<=Vout<5.0 V  
2.0V<=Vout<3.3V  
10  
20  
30  
Regulator Output Current in  
Shutdown  
• 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  
+
6.8 F  
µ
+
1 F  
µ
+
1.23  
V
Reference  
GROUND  
Fig 1 : Fixed Regulator  
Unregulated DC  
7
1.2 --> 24 V  
Vout  
8
1
400mA Max  
1
F
µ
+
R1  
FEEDBACK  
INPUT  
OUTPUT  
+
6.8 F  
µ
+
-
R2  
1.23V  
V
ERROR  
AMPLIFIER  
Ref  
3
From  
CMOS  
or  
SHUTDOWN  
TTL  
Off  
On  
+
1.23  
V
Reference  
GROUND  
V
= V  
REF  
(1+ R1/R2)  
OUT  
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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