⎪



Switching regulator, Non isolated dc-dc

Regulator requiresconverter

MCU application

Pin out compatible with LM78xx linear
Efficiency up to 94.5%



Telecom application

-40°C to +90°C Operating Temperature

Continuous short circuit protection

EN62368 safety approvalPart number

Input voltage

Output voltage

Output current@ full load

Input current@ no load

Ripple & Noise(Max.)

Efficiency
Min. Input/Max. Input

Capacitive load(3)(max.)

A78A1.8-1.0J

4.75-26 VDC

1.8 VDC

1000 mA

10mA

50mVp-p (1)84/74%470μF

A78A3.3-1.0J

4.75-32 VDC

3.3 VDC

1000 mA

12mA

50mVp-p

89/81%470μF

A78A5.0-1.0J

6.5-32 VDC

5.0 VDC

1000 mA

16mA

50mVp-p

92/84.5%

470μF

A78A6.5-1.0J

8-32 VDC

6.5 VDC

1000 mA

20mA

75mVp-p (2)93.5/87.5%

470μF

A78A12-1.0J

15-32 VDC

12 VDC

1000 mA

23mA

100mVp-p

94/90.5%

470μF

A78A15-1.0J

18-32 VDC

15 VDC

1000 mA

25mA

100mVp-p

94.5/91.5%

330μF

1.

(1)

If you use 26V input and the loading is less 5%, the R&N will be 100mVp-p (max.).

2.

(2)

With a 4.7μF/50V X7R MLCC, the R&N will be 50mVp-p (max.).

3.

(3)

The capacitive load is test by minimum input and constant resistive load.

4.

All specifications valid at nominal input voltage, full load and 25℃ after warm-up time unless otherwise stated.

A78A1.8-1.0 J
Output voltage

Output current

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢

sales@ctc-dc-dc.com

∣∣Parameter⎪

Conditions

Min.

Typ.

Input voltage range

Input

-3
0.2

0.4%

Load voltage regulation

10% to 100% full load

0.40.6%

Operating frequency

Vin=nominal Volt

Operating temperature

with de-rating

1%

500

KHz

-4090

˚C-55125

˚C

95%RH

105

˚C

Relative Humidity
0.015 %/˚C

Temperature coefficientMax. case temperature
Vibration

MIL-STD-202G

Short-circuit protection

Continuous, automatic recovery

Safety approvals

EN62368-1

MTBF (MIL-HDBK-217F)

Physical1.
2.

%

LL to HL at full load

Storage temperature

Function+3

Line voltage regulation

Minimum load

Environment

13300

kHrs

Dimension

11.6x7.6x10.2 mm

Weight

1.9Cooling method

Free air convention

Case material

Non conductive black plasticg

All specifications valid at 24V input, full load and 25℃ after warm-up time unless otherwise stated.
The product information and specifications are subject to change without prior notice.

4.7μF++VinVout-Unit4.75-32Vdc

Voltage accuracy

OutputMax.

Ground Lead

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢

sales@ctc-dc-dc.com

∣∣

⎪

Load
100%
80%
60%
50%
40%
Safe operating area

20%
10%

0%
-4001020 30

40 50 60

70 80 90 100 110 (˚C)
85

Ambient temperature with natural convection+Vin+Vout

A78Axx-1.0J

C1C2-Vout-Vin

LOAD

CONVERTER

C1C11500μF/ 50V

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢

sales@ctc-dc-dc.com

∣∣Storage and Handling⎪

Wave Soldering Profile

The shelf life will be a minimum of 12 months, when stored at thePinSingle

1+Vin2GND

3+Vout8.5

following conditions: < 40° C, < 90% relative humidity.

The wave solder profile is measure on lead temperature. And, need keep thesolder parts internal temperature less than about 210°C. For the period of solder
dwell time should be 3 - 5 seconds, and should not over than 10 second.

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢

sales@ctc-dc-dc.com

∣

∣

⎪

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢

T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢

sales@ctc-dc-dc.com

∣

∣

⎪

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢

sales@ctc-dc-dc.com