LSR7805
Series
Low Cost, Miniature
500 mA Surface Mount
POL Switching Regulators
Electrical Specifications
Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice.
Output
Key Features:
•
Efficiency to 96%
•
0.5A Output Current
•
Compact SMT Case
•
LM78xx Replacement
•
Wide Input Range
•
Adjustable Output Voltage
•
Short Circuit Protected
•
Thermal Shutdown
•
Low Noise
•
Low Low Cost
Parameter
Output Voltage Accuracy
Output Voltage Adjustment Range
Line Regulation
Load Regulation
Ripple & Noise (20 MHz)
Thermal Shutdown
Quiescent Current, Note 3
Temperature Coefficient
Maximum Capacitive Load
Output Current Limit
Short Circuit Input Power
Output Short Circuit
Conditions
Typ.
Max.
±2.0
±3.0
Contact Factory For Information
Vin = Min to Max
±0.2
±0.5
Iout = 10% to 100%
±0.3 ±0.75
10
25
See Note 2
160
15
0.02
1,000
1.8
0.5
1.8
Continuous (Autorecovery)
Min.
Not Isolated
Typ.
410
Max.
Min.
Units
%
%
%
mV P - P
°C
mA
%/°C
µF
A
W
General
Parameter
Isolation Voltage
Switching Frequency
Conditions
Units
kHz
Max.
+85
+100
+125
300
95
Units
°C
°C
°C
°C
%
Environmental
Parameter
Operating Temperature Range
Operating Temperature Range
Storage Temperature Range
Lead Temperature
Cooling
Humidity
Conditions
Ambient
Case
Min.
-40
Typ.
+25
-55
1.5 mm From Case For 10 Sec
Free Air Convection
RH, Non-condensing
Physical
Case Size
Case Material
Weight
0.60 x 0.476 x 0.285 Inches (15.24 x 12.10 x 7.25 mm)
Non-Conductive Black Plastic (UL-94V0)
0.08 Oz (2.3g)
Conditions
MIL HDBK 217F, 25°C, Gnd Benign
Min.
2.0
Typ.
Max.
Units
MHours
Reliability Specifications
Parameter
MTBF
Typical Application Circuits
MicroPower Direct
292 Page Street
Suite D
Stoughton, MA 02072
USA
T:
(781) 344-8226
F:
(781) 344-8481
E:
sales@micropowerdirect.com
W:
www.micropowerdirect.com
Component Values
Model
Number
LSR7805-03W
LSR7805-05W
LSR7805-09W
LSR7805-12W
LSR7805-15W
Ceramic Capacitors
C
1
C
2
10
µF/50V
22
µF/
16V
10
µF/50V
22
µF/
16V
10
µF/50V
22
µF/
16V
10
µF/50V
10
µF/
25V
10
µF/50V
10
µF/
25V
Notes:
1. C1 & C2 are low ESR ceramic capacitors used to minimize
noise at the regulator. A tantalum or low ESR electrolytic
capacitor may also be used.
2. C1 & C2 are required and should be mounted as close to
the regulator pins as possible. C3 is required for optimum
performance, use 100
µF
OR more.
3. R1 & R2 are used to adjust the regulator output. For sug-
gested values, please contact the factory.
www.micropowerdirect.com
Model Selection Guide
Model
Number
LSR7805-03W
LSR7805-05W
LSR7805-09W
LSR7805-12W
LSR7805-15W
Input Voltage
(VDC)
Nom.
www.micropowerdirect.com
Output
Voltage Adj Range
(VDC)
(VDC)
Efficiency (%, Typ)
Current
(mA, Max)
12
12
24
24
24
Range
4.5 - 28.0
6.0 - 28.0
11.0 - 28.0
14.0 - 28.0
17.0 - 28.0
3.3
5.0
9.0
12.0
15.0
1.8 - 5.5
2.5 - 8.0
3.0 - 11.5
4.5 - 13.5
4.5 - 15.5
500.0
500.0
500.0
500.0
500.0
Min Vin
90
94
95
95
96
Max Vin
75
81
87
90
92
Notes:
1. Load regulation is specified for an output load change of 10% to 100%.
2. Measured at an internal IC junction.
3. Quiescent current is specified at 0% load for Vin = min to max.
4. This regulator is not designed to be used in parallel with another unit to increase output power.
5. The remote on/off control current is typically 2
µA.
Shutdown
Min
Max
input current is 30
µA
max. The On/Off shutdown threshold
Open or 1.5V<Vc<6.0 VDC
On
voltage is 1.1V to 1.4V.
6. The input should not exceed the range given in the model
Ground or 0.0V<Vc<1.0 VDC
Off
selection chart. Exceeding this limit could damage the unit.
Characteristic Curves
(Efficiency & Ripple)
Derating Curve
Efficiency vs Input Voltage (Full Load)
Efficiency vs Load (Vin = Nom)
Ripple vs Input Voltage (Full Load)
Ripple vs Load (Vin = Nom)
Mechanical Dimensions
Pin
Connection
Pin
1
5
6
7
9
10
Function
+Vin
+Vout
Vadj
Gnd
Gnd
Control
So
Solder Layout
MicroPower Direct
We Power Your Success - For Less!
292 Page Street Ste D Stoughton, MA 02072
•
Notes:
•
All dimensions are typical in inches (mm)
•
Tolerance x.xx = ±0.01 (±0.25)
•
Pin 1 is marked by a “dot” or indentation on the side of the unit
FAX: (781) 344-8481
•
TEL: (781) 344-8226
•
E-Mail: sales@micropowerdirect.com
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