Document
K78XX-1000(L) Series
WIDE INPUT NON-ISOLATED & REGULATED
SINGLE OUTPUT
FEATURES
Product Program
● Efficiency up to 97% ● Operating temperature: -40°C ~ +85°C ● Pin-out compatible with LM78XX Linear ● Short circuit protection, thermal shutdown ● Low ripple and noise ● Micro miniature SIP package ● No heatsink required ● Industry standard pinout ● MTBF>2,000,000 hours
Part Number
K7801-1000(L) K78X2-1000(L) K7802-1000(L) K7803-1000(L) K7805-1000(L)
Input Voltage(VDC)
Nominal
Range
12 4.75-26 12 4.75-26 12 4.75-28 24 4.75~28 24 6.5~32
RoHS
Output
Voltage (VDC)
Current (mA)
1.5 1000
1.8 1000
2.5 1000
3.3 1000
5.0 1000
Efficiency (%)(Typ)
Vin (min.)
Vin (max.)
80 71
83 74
88 80
90 83
93 88
K78X6-1000(L)
24 9.0~32 6.5
1000
94
90
K7809-1000(L)
24 12~32 9.0
1000
95
92
K7812-1000(L)
24 16~32 12
1000
96
94
APPLICATIONS
The K78xx-1000(L) series high efficiency switching regulators are ideally suited to replace 78xx linear regulators and are pin compatible. The efficiency of up to 97% means that very little energy is wasted as heat so there is no need for any heatsinks with their additional space and mounting costs.
K7815-1000(L)
24 20~32 15
1000
Add suffix “L” for 90° bend pins, for example: K7805-1000L.
Output Specifications
Item
Test conditions
Output voltage accuracy 100% full load
Line regulation
Vin=min. to max. at full load
Load regulation*
10% to 100% load
Min.
97 94
Typ. ±2 ±0.2 ±0.4
Max. ±3 ±0.4 ±0.6
Units %
Ripple & Noise
20MHz bandwidth (refer to figure 3)
25 35 mVp-p
Short circuit input power**
0.5 1.8 W
MODEL SELECTION
K7 805- 1000
Short circuit protection
Thermal shutdown
Internal IC junction
Continuous, automatic recovery
150 °C
Output Current Output Voltage Product Series
Switching frequency Output current limit
100% full load
Vin= min. to max. (at full load)
Vout:1.5V~3.3V Vout:5V~15V
280
330 450 KHz
3000 mA
2000
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: 86-20-28203030 Fax:86-20-28203068 Http://www.mornsun-power.com
Quiescent current Temperature coefficient -40°C ~ +85°C ambient Max capacitance load
* K78X2-1000 is ±0.75%(Max), ** K7801-1000 is 4W(Max).
COMMON SPECIFICATIONS
Item
Test conditions
Storage humidity Operating temperature
Power derating (above 71°C)
5 8 mA ±0.02 %/°C 1000 μF
Min. Typ. Max. Units 95 %
-40 85
Operating case temp. Storage temperature
100 °C
-55 125
Lead temperature
1.5mm from case for 10 seconds
300
Cooling
Free air convection
Case material MTBF
25℃(MIL-HDBK-217F)
Plastic (UL94-V0)
2000
k hours
Weight
3.7 g
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78XX-1000(L)
B/1-2011 Page 1 of 4
TYPICAL CHARECTERISTICS Temperature Derating Graph
Operating Temp.( C )
(figure1) TYPICAL APPLICATION CIRCUIT
EXTERNAL CAPACITOR TABLE
Part Number
K7801-1000(L) K78X2-1000(L) K7802-1000(L) K7803-1000(L) K7805-1000(L) K78X6-1000(L) K7809-1000(L) K7812-1000(L) K7815-1000(L)
C1 (Ceramic capacitor)
10µF/50V 10µF/50V 10µF/50V 10µF/50V 10µF/50V 10µF/50V 10µF/50V 10µF/50V 10µF/50V
C2 (Ceramic capacitor)
22µF/6.3V 22µF/6.3V 22µF/6.3V 22µF/6.3V 22µF/16V 10µF/16V 10µF/16V 10µF/25V 10µF/25V
+Vin
1 K78XX-1000(L) 3
+ Vo u t
C1 2 C2
GND
(figure 2)
GND
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.
2.54 mm Lo ad
TEST CONFIGURATIONS (TA=25°C)
1 Efficiency and Output Voltage Ripple Test
+Vin
GND
C1
25.4mm
25.4 mm
12.7mm
1
DC/DC Converter
3
2
+Vout Copper strip
1μ F 10μ F C2 Scope
Ceramic Tantalum
Copper strip
2 Start-up and Load Transient Response Test
(figure 3)
50.8 mm
+Vin
GND
C1
1
DC/DC Converter
3
2
+Vout Copper strip C2 Scop e
Copper strip
(figure 4)
2 .5 4 mm L oad
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
K78XX-1000(L)
B/1-2011 Page 2 of 4
Lo ad
OUTPUT RIPPLE REDUCTION
+Vin
C1 GND
1
DC/DC Converter
+Vout
3
L
2 C2
22μ F
To reduce output ripple, it is recommended to add a LC filter in output port.
L: Recommended parameter 10μH ~ 47μH.
(figure 5)
CHARACTERISTICS CURVE
Efficiency
Efficiency(%) 100
Efficiency VS. Vin(full load)
90 80 70 60 50 40
4.75 9
11 15
K7801-1000 K78X2-1000 K7802-1000 K7803-1000 K7805-1000 K78X6-1000 K7809-1000 K7812-1000 K7815-1000
18 22 26 30 Vin(V)
Ripple
Ripple VS. Vin(full load)
Ripple(mV)
30
25
20
15
10
5
0 4.75 9
11 15 18 22 26 30
K7801-1000 K78X2-1000 K7802-1000 K7803-1000 K7805-1000 K78X6-1000 K7809-1000 K7812-1000 K7815-1000
Vin(V)
Efficiency VS.Loa.