K78L03-500R3 Datasheet, PDF (1/4 Pages) MORNSUN Science& Technology Ltd. – Support the negative output

DC/DC Converter
K78Lxx-500R3 Series
Wide input voltage , non-isolated & regulated single
output
FEATURES
 High efficiency up to 95%
 No-load input current as low as 0.2mA
 Operating temperature range: -40℃ to +85℃
 Support the negative output
 Output short circuit protection
 Pin-out compatible with LM78XX linear regulators
 UL60950, EN60950 approval
RoHS
K78Lxx-500R3 series are high efficiency switching regulators and ideal substitutes of LM78xx series three-terminal linear regulators. The
product is featured with high efficiency, low loss, short circuit protection, support the negative output and no heat sink requirement. They
are widely used in industrial control, instrumentation, and electric power applications.
Selection Guide
Certification
UL/CE
Part
Number
K78L03-500R3
K78L05-500R3
K78L12-500R3
K78L15-500R3
Input Voltage (VDC)
Nominal
(Range)
24
(4.75-36)
24
(6.5-36)
12
(7-31)
24
(15-36)
12
(8-24)
24
(19-36)
12
(8-21)
Output
Output Voltage Max. Output Current
(VDC)
(mA)
3.3
500
5.0
500
-5.0
-300
12
500
-12
-150
15
500
-15
-150
Note:For input voltage higher than 30 VDC, a 22uF/50V input capacitor is required.
Efficiency (%/Typ.)
(Min. Vin)/ (Max. Vin)
@Full Load
86/80
90/84
80/81
94/91
84/85
95/93
85/87
Max.
Capacitive
Load(µF)
680
680
330
680
330
680
330
Input Specifications
Item
No-load Input Current
Reverse Polarity Input
Input Filter
Operating Conditions
Positive output
Min.
Typ.
Max.
Unit
--
0.2
1.5
mA
Forbidden
Capacitor filter
Output Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Output Voltage Accuracy
Line Regulation
Full load, input voltage range
Full load, input voltage range
K78L03-500R3
Others
--
±2
±4
--
±2
±3
%
--
±0.2
±0.4
Load Regulation
Nominal input ,10% -100% load
--
±0.4
±0.6
Ripple & Noise*
20MHz bandwidth, nominal input, 10% -100% load
--
20
75
mVp-p
Temperature Drift Coefficient
Operating temperature -40℃～ +85℃
--
--
±0.03
%/℃
Transient response deviation
Transient recovery time
Nominal input, 25% load step change
--
50
250
mV
--
0.2
1
ms
Output short circuit protection
Nominal input
Continuous, self-recovery
Note: *1. Ripple and noise tested with “parallel cable” method, please refer to DC-DC Converter Application Notes for specific operation methods;
*2. With the load lower than 10%, the maximum ripple and noise of 3.3V/5V output products will be 150mVp-p, 12V/15V output products will be 2%Vo.
2015.12.15-A/1 Page 1 of 4
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