Features
Switching
Regulator
Description
•
•
•
•
•
•
•
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 -74VDC)
Short circuit protection
Fixed swiching frequency (250kHz), shielded
magnetics
DC/DC Converter
R-78T-1.0
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.
1.0 Amp
SMD
Single Output
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
Current
[mA]
1000
1000
1000
Efficiency
@ min Vin
@ max. Vin
[%]
[%]
88
79
92
85
95
92
Model Numbering
R-78T__-1.0/__-__
Output Voltage
Output Current
Packaging
(1)
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 see page I-5 to I-6
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.: 2/2018
I-1
R-78T-1.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
BASIC CHARACTERISTICS
Parameter
Internal Input Filter
Input Voltage Range
Overload Capability
(3)
Quiescent Current
Minimum Load
Internal Operating Frequency
Output Ripple and Noise
20MHz BW
Notes:
Note3: For more inforation, please refer to „Overload Capability Graph“ on page I-4
10%
350kHz
50mVp-p
100mVp-p
nom. Vin= 3.3VDC
nom. Vin= 5.0VDC
nom. Vin= 12VDC
peak duty cycle 10%
1mA
7VDC
8VDC
15VDC
Series
Condition
Min.
Typ.
Max.
C filter
42VDC
42VDC
42VDC
150%, 10s
R-78T3.3-1.0
Efficiency vs. Load
100
90
45
40
Ripple vs. Load
Efficiency [%]
70
60
50
40
30
20
10
0
10
20
7Vin
12Vin
24Vin
36Vin
42Vin
30
40
50
60
70
80
90
100
Ripple & Noise [mVp-p]
80
35
30
25
20
15
10
5
0
0
10
20
24Vin
36Vin
42Vin
30
40
50
60
70
80
90
100
Output Load [%]
Output Load [%]
R-78T5.0-1.0
Efficiency vs. Load
100
90
45
40
Ripple vs. Load
Efficiency [%]
70
60
50
40
30
20
10
0
10
20
8Vin
12Vin
24Vin
36Vin
42Vin
30
40
50
60
70
80
90
100
Ripple & Noise [mVp-p]
80
35
30
25
20
15
10
5
0
0
10
20
24Vin
36Vin
42Vin
30
40
50
60
70
80
90
100
Output Load [%]
continued on next page
www.recom-power.com
REV.: 2/2018
Output Load [%]
I-2
R-78T-1.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78T12-1.0
100
90
Series
Ripple vs. Load
45
40
Efficiency vs. Load
Efficiency [%]
70
60
50
40
30
20
10
0
10
20
15Vin
24Vin
36Vin
42Vin
30
40
50
60
70
80
90
100
Ripple & Noise [mVp-p]
80
35
30
25
20
15
10
5
0
0
10
20
24Vin
36Vin
42Vin
30
40
50
60
70
80
90
100
Output Load [%]
Output Load [%]
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
Transient Response
Condition
full load
low line to high line, full load
10% to 100% load
50mA/uS
100% - 50% load
Value
±2.0% typ. / ±3.0% max.
±0.2% typ.
±0.4% typ.
±250mV max.
PROTECTIONS
Parameter
Short Circuit Protection (SCP)
Condition
Value
current limited to 3.5A typ.
ENVIRONMENTAL
Parameter
Operating Temperature Range
Operating Humidity
MTBF
Condition
with derating @ free air convection (see graph)
non-condensing
according to MIL-HDBK-217F, G.B.
continued on next page
+25°C
Value
-40°C to +85°C
5% - 95% RH max.
6318 x 10
3
hours
www.recom-power.com
REV.: 2/2018
I-3
R-78T-1.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Derating Graph
(@ Free air convection)
160
150
140
120
10s overload
Peak Current
Continuous Current
150
Series
Overload Capability Graph
Output Load [%]
80
60
40
20
100% load
150% overload
0 10 20 30 40 50 60 70 80 90 100
55
85
Output Current [%]
100
100
90
0
-40 -30 -20 -10
0
10
60
70
Ambient Temperature [°C]
Time [s]
SAFETY AND CERTIFICATIONS
Certificate Type (Safety)
EAC
RoHs 2+
Report / File Number
RU-AT.49.09571
Standard
TP TC 004/2011
RoHS-2011/65/EU + AM-2015/863
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Material
Dimension (LxWxH)
Weight
continued on next page
www.recom-power.com
REV.: 2/2018
I-4
Type
PCB
“/AC” or “/AL”
“/FC”
Value
FR4, (UL94 V-0)
23.0 x 27.2 x 10.0mm
23.0 x 29.4 x 8.0mm
4.5g typ.
R-78T-1.0
DC/DC Converter
Specifications
(measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Dimension Drawing (mm)
R-78Txx-1.0/AC
23.0
Series
Pinning information
Pin #
25.0
Single
+Vin
GND
+Vout
1
2
3
8.96
<7.2
Tolerance:
xx.x = ±0.5mm
xx.xx= ±0.25mm
<10.0
3.10
2x2.54= 5.08
11.5
Recommended Footprint Details
2x mounting pads Ø2.0
Bottom View
Top View
4.00
20.0
1 2 3
1.20
R-78Txx-1.0/AL
23.0
11.10
11.20
1 2 3
Pinning information
25.0
Pin #
1
2
3
Single
+Vin
GND
+Vout
8.96
<7.2
Tolerance:
xx.x = ±0.5mm
xx.xx= ±0.25mm
<10.0
3.10
2x2.54= 5.08
11.5
Recommended Footprint Details
2x mounting pads Ø2.0
2.20
7.40
Top View
Bottom View
4.00
1 2 3
1.20
20.0
continued on next page
www.recom-power.com
REV.: 2/2018
I-5
11.10
5.08
11.20
1 2 3
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
