GAPTEC LMT78_05-0.5R Datasheet

LMT78_0.5R series

Wide input, non-isolated & regulated, single output, SMD package

Switching Regulator

Eciency up to 95%
No-load input current
as low as 0.2mA

0.5AMP SMD package
Wide input voltage range
(4,75V - 36V)
Adjustable output voltage

UL-62368-1 (E347551)

Common specications

Cooling: Free air convection

Short circuit protection mode: Hiccup mode

Short circuit protection: Continuous, automatic recovery

Operating temperature range: -40°C ~ +85°C

Storage temperature range: -55°C ~ +125°C

Lead temperature: 300°C MAX, 1.5mm from case for 10 sec

Operating case temperature: 100°C MAX

Reow Soldering Temperature: Peak temp. ≤ 245°C,maximum duration

Storage humidity range: < 95%

Case material: Plastic [UL94-V0]

MTBF (MIL-HDBK-217F,+25°C): > 2,000,000 hours

Package weight: 1.5g

Dimensions: 15.24 * 11.40 * 8.25mm

MSL (Moisture sensitivity level): J-STD-020D standard - Level 1

Input specications

Item Test conditions Min Typ Max Units

No load input
current

Reverse polarity
input

Input lter Capacitor

Remote ON/OFF* • Module switch on

* The voltage of Remote ON/OFF pin is relative to pin GND.

Forbidden

• Module switch o

• Input current when
switched o

Remote ON/OFF control
Output short-circuit
protection (SCP)
Operating ambient temp.
range -40°C to +85°C
IEC62368, UL62368, EN62368
approved

time ≤ 60s at 217°C. For actual
application, please refer to
IPC/JEDEC J-STD-020D.1

0.2 1.5 mA

suspended or connected to TTL
high level (3.2-8VDC)
pin connected to GND or low
level (0-0.8VDC)
30 100 µA

The LMT78_0.5R series are high eciency switching regulators. The
converters feature high eciency, low loss and short circuit protection
in a compact SMD package. These products are widely used in appli-
cations such as industrial control, instrumentation and electric power.

Output specications

Item Test conditions Min Typ Max Units

Output voltage
accuracy

Line regulation Input voltage range at

Load regulation Nominal input, 10% to

Ripple + Noise* 20MHz bandwidth

Temperature
coecient

Transient response
deviation

Transient recovery
time

Vadj input voltage range ±10 %Vo

Switching
frequency

* Ripple and noise tested with “parallel cable” method, please refer to DC-DC

converter Application Notes for specic operation methods.

Example:

LMT78_05-0.5R

LM = Series; T = SMT case; 05 = 5Vout; 0.5 = 0.5A; R = Revised

Note:

1. All specications measured at Ta = 25°C, humidity <75%, nominal input voltage
and rated output load unless otherwise specied.

2. In this datasheet, all the test methods of indications are based on corporate
standards.

Input voltage range at
full load

• 1.5/1.8/2.5/3.3VDC

• Others

full load

100% load

• 1.5/1.8/2.5VDC

• Others

1.5/1.8/2.5/3.3VDC

• 20% - 100% load

Others

• 10% - 100% load

- 40°C to + 85°C
ambient

Nominal input voltage,
25% load step change

Nominal input voltage,
25% load step change

Full load, nominal
input voltage

• LMT78_1.5-0.5R

• Others

±2

±4

±2

±3

±0.2 ±0.4 %

±0.6
±0.3%%

20

50

20

50

±0.03 %/°C

50 200 mV

0.2 1 ms

370
700

%
%

mVp-p

mVp-p

KHz
KHz

GAPTEC-Electronic GmbH & Co. KG

[e-mail] – www.gaptec-electronic.com

LMT78_0.5R – Rev. 2021-1.6

Page 1 of 5

Specications subject to change without notice.

LMT78_0.5R series

Wide input, non-isolated & regulated, single output, SMD package

EMC specications

EMI CE CISPR32/EN55032 CLASS B (see EMC recommended circuit, 2 )

EMI RE CISPR32/EN55032 CLASS B (see EMC recommended circuit, 2 )

EMS ESD IEC/EN61000-4-2 Contact ±4KV perf. Criteria B

EMS RS IEC/EN61000-4-3 10V/m perf. Criteria A

EMS EFT IEC/EN61000-4-4 ±2KV perf. Criteria B (see EMC recommended circuit, 1 )

EMS Surge IEC/EN61000-4-5 line to line ±1KV perf. Criteria B (see EMC recommended circuit, 1 )

EMS CS IEC/EN61000-4-6 3 Vr.m.s perf. Criteria A

Part Number Input Voltage [VDC]

LMT78_1.5-0.5R 12 4.75-28 1.5 500 680 76

LMT78_1.8-0.5R 12 4.75-28 1.8 500 680 76

LMT78_02-0.5R 12 4.75-32 2.5 500 680 81

LMT78_03-0.5R 24 4.75-36 3.3 500 680 86

LMT78_05-0.5R 24 6.5-36 5 500 680 90

LMT78_6.5-0.5R 24 8-36 6.5 500 680 92

LMT78_09-0.5R 24 12-36 9 500 680 93

LMT78_12-0.5R 24 15-36 12 500 680 94

LMT78_15-0.5R 24 19-36 15 500 680 95

Note: For input voltage higher than 30VDC, a 22uF/50V input capacitor is required.

Nominal Range

Output Voltage

[VDC]

Output Current

[mA, Max]

Capacitive load

[µF, max]

Eciency

[Vin. max]

Typical characteristics

GAPTEC-Electronic GmbH & Co. KG

[e-mail] – www.gaptec-electronic.com

LMT78_0.5R – Rev. 2021-1.6

Page 2 of 5

Specications subject to change without notice.

LMT78_0.5R series

Wide input, non-isolated & regulated, single output, SMD package

Eciency

LMT78_05-0.5R

LMT78_05-0.5R

Typical application circuit

LMT78_15-0.5R

LMT78_15-0.5R

Note:

1. C1 and C2 are required and should be connected close to the pin terminal
of the module.

2. The capacitance of C1 and C2 refer to table 1, it can be increased properly
if required, and tantalum or low ESR electrolytic capacitors may also
suce.

3. Cannot be used in parallel for output and hot swap.
To reduce the output ripple furtherly, it is suggested to connect a “LC”
lter at the output terminal, and recommended value of L is 10µH-47µH.

Part number C1

(ceramic capacitor)

LMT78_1.5-0.5R 10µF/50V 22µF/10V

LMT78_1.8-0.5R 10µF/50V 22µF/10V

LMT78_02-0.5R 10µF/50V 22µF/10V

LMT78_03-0.5R 10µF/50V 22µF/10V

LMT78_05-0.5R 10µF/50V 22µF/16V

LMT78_6.5-0.5R 10µF/50V 22µF/16V

LMT78_09-0.5R 10µF/50V 22µF/25V

LMT78_12-0.5R 10µF/50V 22µF/25V

LMT78_15-0.5R 10µF/50V 22µF/25V

GAPTEC-Electronic GmbH & Co. KG

[e-mail] – www.gaptec-electronic.com

C2

(ceramic capacitor)

Ra1/Ra2

(Vadj resistance)

Refer to Vadj

resistance

calculation

Table 1

Page 3 of 5

LMT78_0.5R – Rev. 2021-1.6

Specications subject to change without notice.

LMT78_0.5R series

Wide input, non-isolated & regulated, single output, SMD package

LC lter application circuit

EMC solution-recommended circuit

Note: Part ① in the Fig. 4 is for EMS test, part ② is for EMI ltering; parts ① and ②
can be added based on actual requirement.

Application of Vadj and calculation of Vadj resistance

FUSE Selected based on the actual

input current from the customer

MOV S20K30

LDM1 82µH

C0 680µF/50V

C1/C2 refer to Table 1

C5 4.7µF/50V

LDM2 12µH

Vout (V) R1 (KΩ) R2 (KΩ) R3 (KΩ) Vref (V)

1.5 7.5 7.5 15 0.75

1.8 35.7 26.29 100 0.765

2.5 27 11.858 51 0.765

3.3 33 9.9 47 0.765

5 75 13.5 75 0.765

6.5 75 10 51 0.765

9 51 4.7 27 0.765

12 75 5.1 27 0.765

15 82 4.423 27 0.765

Note: The 1.5VDC output model only support Vadj up,do not support Vadj down.

GAPTEC-Electronic GmbH & Co. KG

[e-mail] – www.gaptec-electronic.com

LMT78_0.5R – Rev. 2021-1.6

Page 4 of 5

Specications subject to change without notice.

LMT78_0.5R series

Wide input, non-isolated & regulated, single output, SMD package

Mechanical dimensions

Note:

Unit: mm[inch]
Pin selection tolerances: ±0.10mm [±0.004inch]
General tolerances: ±0.25mm [±0.010inch]

GAPTEC-Electronic GmbH & Co. KG

[e-mail] – www.gaptec-electronic.com

LMT78_0.5R – Rev. 2021-1.6

Page 5 of 5

Specications subject to change without notice.