K78LXX-1000 Series
WIDE INPUT NON-ISOLATED REGULATED
OUTPUT
FEATURES
●
Efficiency up to 96%
●Temperature
range: -40°C ~ +85°C
●
No heatsink required
●
Pin-out compatible with LM78XX linears
●
Thermal shutdown
●
Low ripple and noise
●
SIP package
●
Industry standard pinout
●
MTBF>2,000,000 hours
RoHS
PRODUCT PROGRAM
Part
Number
K78L03-1000
K78L05-1000
K78L09-1000
K78L12-1000
Input Voltage
Range (VDC)
4. 75-30
6.5-30
12-30
16-30
Output
Voltage
(VDC)
3.3
5.0
9.0
12
Current
(mA)
1000
1000
1000
1000
Efficiency (%)
Vin (Min)
90
93
95
96
Vin (Max)
81
85
90
93
OUTPUT SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
±2
±0.5
±0.2
±0.5
25
160
Input voltage range at full load
340
410
460
2000
mA
Quiescent current
5
8
±0.02
1000
%/°C
μF
Max.
±3
±1.0
±0.5
±0.75
35
mVp-p
°C
kHz
%
Units
APPLICATIONS
The K78LXX-1000 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 voltage accuracy Input voltage range at full load
3.3V output
Line regulation
5V, 9V,12V output
Load regulation
Ripple + Noise*
Thermal Shutdown
Switch frequency
Output current limit
Normal input, 10% to 100% load
20MHz Bandwidth
(refer to figure 3 )
MODEL SELECTION
K78L05-1000
Output Current
Output Voltage
Product Series
Temperature coefficient -40°C ~ +85°C
Max capacitance load
*Test ripple and noise by
“parallel
cable” method.
COMMON SPECIFICATIONS
Item
Storage humidity range
Operating temp. range
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
Test Conditions
Min.
Typ.
Max.
95
Units
%
Power derating (above 71°C)
-40
85
100
°C
Operating case temp.
Storage temp. range
Lead temperature
Cooling
Case material
Storage humidity range
MTBF
Package weight
25℃（MIL-HDBK-217F）
2000
3.7
1.5mm from case for 10 seconds
-55
125
300
Free Air Convection
Plastic (UL94-V0)
95
%
k hours
g
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78LXX-1000
A/3-2012
Page 1 of 3
TEMPERATURE DERATING GRAPH
EXTERNAL CAPACITOR TABLE
C1
(Ceramic
capacitor)
10µF/50V
10µF/50V
10µF/50V
10µF/50V
C2
(Ceramic
capacitor)
22µF/6.3V
22µF/10V
10µF/16V
10µF/25V
Part
Number
K78L03-1000
K78L05-1000
K78L09-1000
Operating Temp.(
C
)
（figure
1）
K78L12-1000
TYPICAL APPLICATION CIRCUIT
+Vin
C1
GND
1
3
C2
GND
K78LXX-1000
+Vo ut
2
(figure 2)
1. C1 and C2 are required and should be fitted close to the converter pins.
2. The capacitance of C1, C2 sees external capacitor table, it can be increased properly if required, and tantalum or low ESR electrolytic
capacitors may also suffice.
3. No parallel connection or plug and play.
TEST CONFIGURATIONS (TA=25°C)
1
Efficiency and Output Voltage Ripple Test
25 .4m m
2 5.4 mm
12.7mm
+Vin
1
C1
2
C2
C era mi c Ta nta lum
Scope
GND
Copper strip
(figure 3)
2
Start-up and Load Transient Response Test
5 0 .8 m m
+Vin
1
C1
DC/DC
Converter
2
3
C2
Copper strip
+V o u t
2.54 m m
Scope
GND
Copper strip
(figure 4)
OUTPUT RIPPLE REDUCTION
L
+Vin
1
C1
DC/DC
Converter 3
2
+Vout
Load
Loa d
1
μ
F
10
μ
F
2 .54 mm
DC/DC
Converter
3
+Vou t
Copper strip
C2
2 2
μ
F
GND
(figure 5)
To reduce output ripple, it is recommended to add a LC filter in output port.
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78LXX-1000
A/3-2012
Page 2 of 3
Load
CHARACTERISTICS
Efficiency
Ripple (mV)
100
95
90
Efficiency (% )
85
80
75
70
65
60
55
50
50
Efficiency (%)
100
90
80
70
60
50
40
30
20
10
0
4.5
8
11
15
18
22
26
30
Vin(V)
K78L03-1000
K78L05-1000
K78L09-1000
K78L12-1000
5
0
25
35
30
Ripple
K78L03-1000
K78L05-1000
K78L09-1000
K78L12-1000
15
10
20
K78L03-1000
K78L05-1000
K78L09-1000
K78L12-1000
150
250
350
450
550
650
750 Load
50
300
450
650
800
1050
1200
Load
Efficiency VS Load (Vin=Nominal)
Ripple(mV)
35
30
25
Ripple VS Load (Vin=Nominal)
K78L03-1000
20
15
10
5
0
4.5 6.5 8
10 11 12 15 18 20 22 24 26 28 30 Vin (V)
K78L05-1000
K78L09-1000
K78L12-1000
Efficiency VS Input Voltage (Full load)
Ripple VS Input Voltage(Full load)
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT(TOP VIEW)
Ф1.00
[0.039]
17.50 [0.689]
(Front View)
4.10 [0.161]
5.08 [0.200]
11.50[0.453]
0.50 [0.020]
1 2
3
TUBE OUTLINE DIMENSIONS
11.60 [0.457]
(Bot tom View)
2.15 [0.085]
1 2
3
0.30 [0.012]
0.50 [0.020]
Note:
Unit:mm[inch]
Pin section tolerances:± 0.10mm[± 0.004inch]
General tolerances:± 0.25mm[± 0.010inch]
FOOTPRINT DETAILS
Pin
1
2
3
Functi on
+Vin
GND
+Vout
6.60 [0.260]
Note:
Unit :mm[inch]
General tolerances:
±
0.50mm [ 0.020inch]
±
L=530mm[20.866inch] pcs/tube: 44
L=220mm[8.661inch]
pcs/tube: 17
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.
Note:
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-1000
A/3-2012
Page 3 of 3
27.10 [1.067]
20.60 [0.811]
9.00 [0.354]
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