●
●
●
●
Features
●
●
●
INNOLINE
Efficiency up to 95%, no Need for Heatsinks!
Industry Standard Pin-Out
1.5A Start-Up Overload Capacity
Non-Isolated Regulator with very low Standby
Current
Wide Input Range (7V ~ 42V)
Short Circuit Protection
Fixed Switching Frequency (350kHz), Shielded
Magnetics
DC/DC-Converter
with 3 year Warranty
1.0 AMP
SMD
Single Output
Description
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
SIP3
Input
Range
(V)
Output
Voltage
(V)
Output
Current
(A)
Efficiency
Min. Vin
Max. Vin
(%)
(%)
R-78T3.3-1.0*
7 – 42
3.3
1.0
88
79
R-78T5.0-1.0*
8 – 42
5.0
1.0
92
85
R-78T12-1.0*
15 – 42
12
1.0
95
92
*add suffix /FC, /AC or /AL for required pinning option
* add suffix -R for tape&reel packing e.g. R-78T3.3-1.0/FC-R.
-Tray for Tray packaging, e.g. R-78T5.0-1.0/AC-Tray For more details see Application Notes.
RoHS
2011/65/EU
6/6
Specifications ( typical at 25°C, 10% minimum load, unless otherwise specified )
3.3V
5V
12V
No Load Input Current
Input Filter
Voltage Accuracy
Line Regulation
Load Regulation
Minimum Load
Ripple & Noise (20MHz Limited)
Transient Response 50mA/uS
Operating Frequency
Current Limit
Short Circuit Protection
Operating Temperature
Storage Temperature
Humidity
Dimension
(LL to HL at Full Load)
(10-100%)
100% - 50% Load
suffix /AC or /AL
suffix /FC
Weight
Cooling Method
MTBF (25°C)
MIL-HDBK-217F
7-42VDC
8-42VDC
15-42VDC
1mA typ.
C Filter
±2% typ. / ±3% max.
±0.2% typ.
±0.4% typ.
10%
50mVp-p typ. / 100mVp-p max.
±250mV max.
350KHz typ.
1.5A / 10sec max.
Current limited to 3.5A typ.
-40°C to 85°C
-55°C to 125°C
5% to 95% RH max.
23 x 27.2 x 10mm
23 x 29.4 x 8mm
4.5g typ.
Free Air Convection
367 x 10³ hours
Standard Application Circuit
+Vin
1
C1
Optional
GND
www.recom-power.com
R-78T5.0-1.0
2
3
R-78T-1.0
Derating-Graph
(Ambient Temperature)
1.6
10s
Overload
1.4
Iout (Amps)
Input Voltage Range
1.2
1.0
0.8
0.6
Safe Operating Area
0.4
0.2
0
-40
85
50
75
100
55
Operating Temperature (°C)
0
25
+Vout
C2
Optional
GND
REV: 1/2016
Refer to Application Notes
I-33
R-78Txx-1.0
Series
INNOLINE
DC/DC-Converter
Typical Characteristics
Efficiency
Ripple
R-78T3.3-1.0
45
95
40
Efficiency (%)
90
Ripple & Noise [mVp-p]
100
7V
12V
24V
36V
42V
85
80
75
70
30
25
20
15
65
10
60
5
55
0
20
40
60
80
42V
24V
36V
35
0
100
0
0,2
Load (%)
0,4
0,6
0,8
1,0
Load Current [A]
R-78T5.0-1.0
100
45
95
85
Ripple & Noise [mVp-p]
Efficiency (%)
R-78T
40
8V
12V
24V
36V
42V
90
80
75
70
30
25
20
15
65
10
60
5
55
0
20
40
60
80
0
100
42V
24V
36V
35
0
0,2
Load (%)
0,4
0,6
0,8
1,0
Load Current [A]
R-78T12-1.0
45
100
Ripple & Noise [mVp-p]
95
Efficiency (%)
40
15V
24V
36V
42V
90
85
80
25
20
15
5
0
0
20
40
60
80
100
0
0,2
0,4
0,6
0,8
1,0
Load Current [A]
Load (%)
I-34
24V
30
10
75
70
42V
36V
35
REV: 1/2016
www.recom-power.com
R-78Txx-1.0
Series
INNOLINE
DC/DC-Converter
Package Style and Pinning (mm)
R-78Txx-1.0/AC
Pin Connections
Recommended Footprint
Pin #
1
2
3
Æ 2.00
(2x Mounting Pads)
20.00
+Vin
GND
+Vout
11.23
23
25
11.10
Bottom View
Bottom
Top View
2.2
4.00
1 2 3
2.54
1.20 ±0.1
0.64 ±0.1
2.2
5.08
2.54
2.82
10 max.
Tolerance ±0.5mm unless otherwise specified
R-78T
R-78Txx-1.0/AL
Recommended Footprint
Æ 2.00
Pin Connections
(2x Mounting Pads)
20.00
Pin #
1
2
3
5.08
5.08
11.23
7.40
11.10
+Vin
GND
+Vout
23
Bottom View
4.00
25
Bottom
Top View
2.2
1 2 3
1.20 ±0.1
2.54
2.54
0.64±0.1
5.08
2.2
2.82
10 max.
Tolerance ±0.5mm unless otherwise specified
www.recom-power.com
REV: 1/2016
I-35
R-78Txx-1.0
Series
INNOLINE
DC/DC-Converter
Package Style and Pinning (mm)
R-78Txx-1.0/FC
Pin Connections
Pin #
1
2
3
Recommended Footprint
10.16
2.2
23
11.10
+Vin
GND
+Vout
11.10
10.16
Bottom View
25
Top
4.00
Bottom View
1 2 3
2.2
1.20± 0.1
2.54
2.54
0.64±0.1
2.2
6.72
8 max.
5.08
R-78T
Tolerance ±0.5mm unless otherwise specified
The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit
written consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer
shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications.
I-36
REV: 1/2016
www.recom-power.com