K78LXX-500 Series
WIDE INPUT NON-ISOLATED REGULATED
OUTPUT
RoHS
FEATURES
●
Efficiency up to 96%
●Temperature
range: -40°C to +85°C
●
No heat sink required
●
Pin-out compatible with LM78XX linears
●
Thermal shutdown
●
Low ripple and noise
●
SIP package
●
Industry standard pinout
●
MTBF>2,000,000 hours
PRODUCT PROGRAM
Part
Number
K78L03-500
K78L05-500
K78LX6-500
K78L09-500
K78L12-500
K78L15-500
Input Voltage (VDC)
Normal
12
12
24
24
24
24
Range
4.5-30
6.5-30
8-30
11-30
15-30
18-30
Output
Voltage
(VDC)
3.3
5.0
6.5
9.0
12
15
Current
(mA)
500
500
500
500
500
500
Efficiency (%)（Typ.）
Vin (Min)
90
94
95
95
96
96
Vin (Max)
77
81
85
89
92
93
APPLICATIONS
The
K78LXX-500
Series
high
efficiency
switching regulators are ideally suited to replace
78xx linear regulators and are pin compatible.
The efficiency of up to 96% means that very little
energy is wasted as heat so there is no need for
any heat sinks with their additional space and
mounting costs.
OUTPUT SPECIFICATIONS
Item
Output voltage accuracy
Line regulation*
Load regulation
Ripple & Noise
Thermal shutdown
Output current limit
Quiescent current
Temperature coefficient
-40
°C
to +85
°C
ambient
Test Conditions
Input voltage range at full load
Input voltage range at full load
Normal input ,10% to 100% load
20MHz Bandwidth (refer to figure 3)
Internal IC junction
Normal input voltage
Min.
Typ.
±2
±0.3
±0.5
20
160
2000
mA
5
13
±0.02
1000
%/°C
μF
Max.
±3
±0.5
±0.75
35
mVp-p
°C
%
Units
MODEL SELECTION
Max capacitance load
K78L05-500
Outp ut Cu rren t
Output Volta ge
Produ ct Se ries
* K78L03-500 is
±1.0%
(Max)
COMMON SPECIFICATIONS
Item
Storage humidity range
Test Conditions
Min.
Typ.
Max.
95
Power derating (above 71°C)
-40
85
100
-55
1.5mm from case for 10 seconds
125
300
Free Air Convection
Plastic (UL94-V0)
25℃（MIL-HDBK-217F）
2000
2.0
k hours
g
°C
Units
%
MORNSUN Science & Technology Co.,Ltd.
Address: No. 5, Kehui St. 1, Kehui development
center, Science Ave., Guangzhou Science City,
Luogang district, Guangzhou,P.R.China.
Tel: 86-20-38601850
Fax:86-20-38601272
Http://www.mornsun-power.com
Operating temp. range
Operating case temperature
Storage temp. range
Lead temperature
Cooling
Case material
MTBF
Weight
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78LXX-500
B/0-2012
Page 1 of 5
TYPICAL TEMPERATURE CURVE
Temperature Derating Graph
EXTERNAL CAPACITOR TABLE
Part
Number
K78L03-500
K78L05-500
K78LX6-500
K78L09-500
K78L12-500
C1
C2
(ceramic capacitor) (ceramic capacitor)
10μF/50V
10μF/50V
10μF/50V
10μF/50V
10μF/50V
10μF/50V
22μF/16V
22μF/16V
10μF/16V
10μF/16V
10μF/25V
10μF/25V
Operating Temp.(
C
)
K78L15-500
(figure 1)
STANDARD APPLICATION CIRCUIT
+Vi n
1 K 78 LX X-5 0 0 3
+ Vou t
+
G ND
C1
2
+
C2
G ND
Note :
1.C 1 an d C2 are re quired and should b e fi tted clo se to the co nve rter pins .
2.T he c apacitance of C1 , C2 s ees ext ernal ca pac itor table,it can be incr eas ed
prop erly if requi red, and
tantalu m o r low ES R e lectrolytic c apacitors m ay also suffice
.
3.N o paral lel c onn ecti on or plug and p lay.
4.O utp ut c an n ot s hort-cir cuit,or i t ma y cause per manent dam ag e to the dev ice.
(figure 2)
TEST CONFIGURATIONS (TA=25°C)
1
Efficiency and Output Voltage Ripple Test
25 .4 m m
2 5 .4 mm
1 2.7 mm
+Vin
1
C1
2
C2
C e ram ic Ta nta lu m
Scope
GND
Co pper strip
(figure 3)
2
Start-up and Load Transient Response Test
5 0 .8 m m
+Vin
1
C1
DC/DC
Con verter
2
3
C2
Cop pe r strip
+Vo u t
2.54 m m
Scop e
GND
Cop pe r strip
(figure 4)
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78LXX-500
B/0-2012
Page 2 of 5
Load
Load
1
μ
F
1 0
μ
F
2.54 mm
DC/DC
Converter
3
Coppe r strip
+Vou t
OUTPUT RIPPLE REDUCTION
To reduce output ripple, it is recommended to add a LC filter in output port.
L: Recommended parameter 10μH ~ 47μH.
+Vin
1
C1
DC/DC
Converter 3
2
+Vou t
L
C2
2 2
μ
F
GND
(figure 5)
CHARACTERISTIC CURVE (TA=25°C)
1 Efficiency and Output Voltage Ripple
Efficiency(%)
100
90
80
70
60
50
40
30
20
10
0
20
40
60 100 140 180 220 260 300 340 380 420 460 500 550
Load(mA)
K78L03-500
K78L05-500
K78LX6-500
K78L09-500
K78L12-500
K78L15-500
Ripple(mV)
50
45
40
35
30
25
20
15
10
5
0
20
60 100 140 180 220 260 300 340 380 420 460 500 550 Load
K78L03-500
K78L05-500
K78LX6-500
K78L09-500
K78L12-500
K78L15-500
Efficiency VS Load(Vin=rating)
Efficiency VS Output Load (Vin=Norm)
Efficiency(%)
100
95
90
85
80
75
70
65
60
55
50
45
4.5 6.5 8 10 11 12 15 16 18 20 22 24 26 28 30 Vin(V)
K78L03-500
K78L05-500
K78LX6-500
K78L09-500
K78L12-500
K78L15-500
Output Voltage Ripple VS Output Load (Vin=Norm)
Ripple(mV)
50
45
40
35
30
25
20
15
10
5
0
4.5 6.5
8
10 11 12 15 18 20 22 24 26 28 30 Vin(V)
K78L03-500
K78L05-500
K78LX6-500
K78L09-500
K78L12-500
K78L15-500
Efficiency VS Vin(Full Load)
Ripple VS Vin(Full Load)
Efficiency VS Input Voltage (Full Load)
2 Start-up Waveform
K78L03-500
Vin=12Vdc, Out=3.3V/500mA, Cin=10μF, Co=22μF
Output Voltage Ripple VS Input Voltage (Full Load)
K78L05-500
Vin=12Vdc, Out=5V/500mA , Cin =10μF, Co=22μF
CH1:1V/div, Time:5ms/div
The copyright and authority for the interpretation of the products are reserved by MORNSUN
CH1:1V/div, Time:5ms/div
Specifications subject to change without notice.
K78LXX-500
B/0-2012
Page 3 of 5
Load
K78LX6-500
Vin=24Vdc, Out=6.5V/500mA, Cin=10μF, Co=10μF
K78L09-500
Vin=24Vdc, Out=9V/500mA, Cin=10μF, Co=10μF
CH1:2V/div, Time:5ms/div
CH1:2V/div, Time:5ms/div
K78L12-500
Vin=24Vdc, Out=12V/500mA, Cin=10μF, Co=10μF
K78L15-500
Vin=24Vdc, Out=15V/500mA, Cin=10μF, Co=10μF
CH1:2V/div, Time:10ms/div
CH1:5V/div, Time:10ms/div
3
Load Transient Response
K78L03-500
Vin=12Vdc, Vout=3.3V, Cin=10μF, Co=22μF
K78L05-500
Vin=12Vdc, Vout=5V , Cin =10μF, Co=22μF
CH1: Vout, 200mV/div
CH2: I
Load
, 500mA/div
Time: 500μs/div
K78LX6-500
Vin=24Vdc, Vout=6.5V, Cin=10μF, Co=10μF
CH1: Vout, 200mV/div
CH2: I
Load
, 500mA/div
Time: 500μs/div
K78L09-500
Vin=24Vdc, Vout=9V, Cin=10μF, Co=10μF
CH1:Vout, 200mV/div
CH2:I
Load
, 500mA/div
Time: 500μs/div
CH1: Vout,200mV/div
CH2: I
Load
,500mA/div
Time: 500μs/div
Specifications subject to change without notice.
K78LXX-500
B/0-2012
Page 4 of 5
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78L12-500
Vin=24Vdc, Vout=12V, Cin=10μF, Co=10μF
K78L15-500
Vin=24Vdc, Vout=15V, Cin=10μF, Co=10μF
CH1: Vout, 200mV/div
CH2: I
Load
, 500mA/div
Time: 500μs/div
CH1: Vout, 200mV/div
CH2: I
Load
, 500mA/div
Time: 500μs/div
PACKAGE STYLE AND PINNING
MECHANICAL DIMMENSIONS
0.50[0.020]
RECOMMENDED FOOTPRINT
(
Front View
)
10.20
[0.402]
1
2
3
4.10[0.161]
0.50 [0.020]
5.08 [0.200]
Φ
1.00
[0.039]
Note: grid 2.54*2.54mm
.
1.80[0.071]
7.50[0.295]
TUBE OUTLINE DIMENSIONS
9.60
[0.378]
(
Bottom View
)
11.60
[0.457]
FOOTPRINT DETAILS
Pin
1
2
3
0.30[0.012]
1
2
3
16.90[0.665]
4.90 [0.193]
Note:
Unit
:
mm[inch]
General tolerance
±0.50mm[±0.020inch]
L=530mm[20.866 inch] Packaging quantity:43pcs
L=220mm[8.661inch]
Packaging quantity:17 pcs
Short tube inner packaging dimensions: L*W*H=255*170*80mm;
Short tube outer packaging dimensions(with six inner packaging boxes):
L*W*H=375*280*270mm;
Long tube inner packaging dimensions: L*W*H=580*200*100mm;
Long tube outer packaging dimensions(with two inner packaging boxes)
L*W*H=600*215*220mm;
Long tube outer packaging dimensions(with three inner packaging boxes)
L*W*H=600*215*325mm.
Function
+Vin
GND
+Vout
Note
:
Unit
:
mm
[
inch
]
Pin section tolerances
:±
0.10mm[± 0.004inch]
General tolerances:
±
0.25mm[± 0.010inch]
Note:
12.40
[0.488]
：
：
1. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
2. In this datasheet, all the test methods of indications are based on corporate standards.
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78LXX-500
B/0-2012
Page 5 of 5
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