The copyright and authority for the interpretation of the products are reserved by MORNSUN

Specifications subject to change without notice.

K78XXT-1000

A/0-2011

Page 2 of 5

COMMON SPECIFICATIONS

TYPICAL TEMPERATURE CURVE

Item

Test Conditions

Min.

Typ.

Max.

Units

Case Material

Plastic (UL94-V0)

MTBF

(MIL-HDBK-217F,+25

°C)

1000

k hours

Hop swap

Not supported

Thermal resistance

90

℃/W

Weight

2.3

g

EMC SPECIFICATIONS

EN55022, CLASS A(without external circuit)

CE

EN55022, CLASS B(refer to Figure 4)

RE

EN55022, CLASS A(refer to Figure 5)

ESD

IEC/EN61000-4-2

Air

±8KV / Contact ±6KV perf. Criteria B

EFT

IEC/EN61000-4-4

±2KV

perf. Criteria B

Surge

IEC/EN61000-4-5

±2KV

perf. Criteria B(refer to Figure 4)

TYPICAL APPLICATION CIRCUIT

0

20

40

60

80

100

120

-40

0

40

85

120

Operating Temp.()

°C

71

Safe Operating Area

Temperature Derating Graph

(Figure2)

RECOMMENDED REFLOW SOLDERING PROFILE

K7805T-1000

1

7,9

5

Vin

G ND

Vout

C2

C1

6

10

ON/OFF

R1

R2

G ND

4 70 pF

C4

(Figure 1)

1. C1, C2 is required for best performance 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.

EXTERNAL CAPACITOR TABLE

Part

Number

C1

(Ceramic

Capacitor)

C2

(Ceramic

Capacitor)

K7803T-1000

10

μF/25V

22

μF/16V

K7805T-1000

10

μF/25V

22

μF/16V

(Figure 3)

ADJUSTMENT RESISTOR VALUES

The R1, R2 in the above table are used to set the output voltage. If no need to adjust the output voltage, connect a ceramic capacitor to

GND with 470pF typical value for increase immunity. Insure the output voltage is in the adjust range or else may cause permanent damage to the

device. Fine-tune output voltage must appease Vin-Vo>2V.

Part Number

K7803T-1000

K7805T-1000

Vo (nominal)

3.3(V)

5.0(V)

Vadj(V)

R1(K

Ω)

R2(K

Ω)

R1(K

Ω)

R2(K

Ω)

1.8

15.4

-

-

-

2.5

87

-

9.7

-

3.0

339

-

30.5

-

3.3

-

-

48.8

-

3.6

-

121

75

-

3.9

-

51.0

115

-

4.5

-

16.6

338

-

4.9

-

8.0

1835

-

5.0

-

6.5

-

-

5.1

-

5.2

-

426

5.5

-

1.1

-

58.7

6.0

-

-

-

16.9

6.5

-

-

-

3.2

0

50

1 00

1 50

2 00

2 50

Tim e (sec .)

9 0

M ax

(> 22 0 C)

S e c

22 0 C

10

M ax

Se c

P ea k .Te m p 24 0 C