• Efficiency up to 95%, no need for heatsinks
• Industry standard pin-out
• 1.5A start-up overload capacity
• Non-isolated regulator, very low standby current
• Wide input range (7V -42VDC)
• Short circuit protection
• Fixed swiching frequency (350kHz), shielded
magnetics
Features
Switching
Regulator
Description
DC/DC Converter
R-78T-1.0
1.0 Amp
3
SMD
Single Output
YEA R
y
arrant
w
The R-78T is a switching regulator with a wide input voltage range and a low profile SMD package.
Three output voltages are available as standard: 3.3V, 5V and 12V. Due to the 1.5A start-up overload
capability, the R-78T can be used to replace 1A or 1.5A regulators in many applications. These modules
come with three different styles to be pin-compatible with existing solutions, but at a lower cost.
Selection Guide
Part
Number
R-78T3.3-1.0
R-78T5.0-1.0
R-78T12-1.0
Input
Voltage Range
[VDC]
7 - 42
8 - 42
15 - 42
Output
Voltage
[VDC]
3.3
5.0
12
Output Efficiency
Current
@ min Vin @ max. Vin
[mA]
[%] [%]
1000
88
79
1000
92
85
1000
95
92
Model Numbering
R-78T__-1.0/__-__
Output Voltage
Packaging (1)
Output Current
Pinning (2)
Notes:
Note1: add suffix „-R“ for tape & reel packaging or „-Tray“ for tray packaging
Note2: add suffix „/FC“, „/AC“ or „/AL“ for required pinning option, for more
information refer to „DIMENSION AND PHYSICAL CHARACTERISTICS“
Ordering Examples:
R-78T3.3-1.0/FC-R = 3.3VDC Output Volage, 1.0A, FC pinning, tape and reel packaging
R-78T5.0-1.0/AC-Tray = 5.0VDC Output Voltage, 1.0A, AC pinning, tray packaging
www.recom-power.com
REV.: 3/2020
I-1
R-78T-1.0
DC/DC Converter
Series
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
BASIC CHARACTERISTICS
Parameter
Condition
Min.
Typ.
Max.
Internal Input Filter
Input Voltage Range
nom. Vin= 3.3VDC
nom. Vin= 5.0VDC
nom. Vin= 12VDC
Overload Capability (3)
peak duty cycle 10%
C filter
42VDC
42VDC
42VDC
150%, 10s
7VDC
8VDC
15VDC
1mA
Quiescent Current
Minimum Load
Internal Operating Frequency
10%
350kHz
Output Ripple and Noise
20MHz BW
50mVp-p
100mVp-p
Notes:
Note3: For more inforation, please refer to „Overload Capability Graph“
R-78T3.3-1.0
Ripple vs. Load
100
45
90
40
80
35
Ripple & Noise [mVp-p]
Efficiency [%]
Efficiency vs. Load
70
60
50
40
7Vin
12Vin
24Vin
36Vin
42Vin
30
20
10
0
10
20
30
30
25
20
15
24Vin
36Vin
42Vin
10
5
0
40
50
60
70
80
90
100
0
10
20
30
40
50
60
Output Load [%]
Output Load [%]
Efficiency vs. Load
Ripple vs. Load
70
80
90
100
70
80
90
100
100
45
90
40
80
35
Ripple & Noise [mVp-p]
Efficiency [%]
R-78T5.0-1.0
70
60
50
40
8Vin
12Vin
24Vin
36Vin
42Vin
30
20
10
0
10
20
30
30
25
20
15
10
24Vin
36Vin
42Vin
5
0
40
50
60
70
80
90
100
0
10
20
30
40
50
60
Output Load [%]
Output Load [%]
continued on next page
www.recom-power.com
REV.: 3/2020
I-2
R-78T-1.0
DC/DC Converter
Series
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Efficiency vs. Load
Ripple vs. Load
100
45
90
40
80
35
Ripple & Noise [mVp-p]
Efficiency [%]
R-78T12-1.0
70
60
50
40
30
15Vin
24Vin
36Vin
42Vin
20
10
0
10
20
30
30
25
20
15
10
24Vin
36Vin
42Vin
5
0
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Output Load [%]
Output Load [%]
REGULATIONS
Parameter
Condition
Output Accuracy
full load
Line Regulation
low line to high line, full load
Load Regulation
Transient Response
Value
±2.0% typ. / ±3.0% max.
±0.2% typ.
10% to 100% load
50mA/uS
±0.4% typ.
100% - 50% load
±250mV max.
PROTECTIONS
Parameter
Condition
Value
Short Circuit Protection (SCP)
current limited to 3.5A typ.
ENVIRONMENTAL
Parameter
Operating Temperature Range
Operating Humidity
MTBF
Condition
Value
with derating @ free air convection (refer to “Derating Graph”)
non-condensing
according to MIL-HDBK-217F, G.B.
-40°C to +85°C
5% - 95% RH max.
+25°C
6318 x 103 hours
continued on next page
www.recom-power.com
REV.: 3/2020
I-3
R-78T-1.0
DC/DC Converter
Series
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Derating Graph
Overload Capability Graph
(@ Free air convection)
160
150
140
10s overload
Peak Current
Continuous Current
150
100
Output Current [%]
Output Load [%]
120
80
60
40
20
100
90
100% load
150% overload
0
-40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90 100
55
85
0
10
60
70
Time [s]
Ambient Temperature [°C]
SAFETY AND CERTIFICATIONS
Certificate Type (Safety)
EAC
Report / File Number
RU-AT.49.09571
RoHS2+
Standard
TP TC 004/2011
RoHS-2011/65/EU + AM-2015/863
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Material
Dimension (LxWxH)
Type
PCB
“/AC” or “/AL”
“/FC”
Weight
Value
FR4, (UL94 V-0)
23.0 x 27.2 x 10.0mm
23.0 x 29.4 x 8.0mm
4.5g typ.
continued on next page
www.recom-power.com
REV.: 3/2020
I-4
R-78T-1.0
DC/DC Converter
Series
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Dimension Drawing (mm)
R-78Txx-1.0/AC
25.0
23.0
8.96
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