R-78AA1.5-1.0SMD.pdf 데이터시트 (총 6 페이지) - 파일 다운로드 R-78AA1.5-1.0SMD 데이타시트 다운로드

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Features
Switching
Regulator
• Efficiency up to 94%, no need for heatsinks
• High reflow temperature SMD package
• Adjustable output voltage buck converter
• Short circuit protection, thermal shutdown
• Remote on/off control
• Very low shutdown current
DC/DC Converter
R-78AA-1.0
Description
The R-78AAxx-1.0SMD series are adjustable output non-isolated buck converters that meet the
requirements for RoHS 10/10 as well as the reflow soldering temperatures associated with va-
por phase soldering, making these high efficiency switching regulators ideally suited to modern
pick-and-place mass production. The efficiency of up to 97% means that very little energy
is wasted as heat. The additional features of remote on/off control, continuous short circuit protection
and adjustable output voltages will find many uses in the battery-powered, industrial, medical and
automotive markets.
1.0 Amp
SMD
Single Output
Selection Guide
Part
Number
Input Output Vout Output Efficiency
Voltage Range Voltage Adjust Range Current @ min Vin @ max. Vin
[VDC] [VDC] [VDC] [mA] [%] [%]
R-78AA1.5-1.0SMD 4.75 - 18
1.5
fixed
1.0
77
73
R-78AA1.8-1.0SMD 4.75 - 18
1.8
1.5 - 3.0
1.0
82
76
R-78AA2.5-1.0SMD 4.75 - 18
2.5
1.5 - 3.0
1.0
87
81
R-78AA3.3-1.0SMD 4.75 - 18
3.3
3.0 - 5.5
1.0
90
84
R-78AA5.0-1.0SMD 6.5 - 18
5.0
3.0 - 5.5
1.0
94
89
Notes:
Note1: Input voltage ranges valid for nominal output voltages
Vin must be higher than Vout including adjust range and dropout voltage
Model Numbering
R-78AA__-1.0SMD-_
nom. Output Voltage
Output Current
Packaging (2)
Package
EN60950-1 certified
IEC60950-1 certified
Notes:
Note2: add suffix -R for tape & reel packaging
Ordering Examples:
R-78AA5.0-1.0SMD-R = 5.0VDC Output Volage, 1.0A, SMD, tape and reel packaging
R-78AA2.5-1.0SMD = 2.5VDC Output Volage, 1.0A, SMD, tube
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REV.: 5/2019
I-1

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R-78AA-1.0
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Series
BASIC CHARACTERISTICS
Parameter
Quiescent Current
Internal Power Dissipation
Output Voltage Adjustability
Minimum Load (2)
Start-up time
ON/OFF CTRL
Input Current of CTRL Pin
Standby Current
CTRL Thereshold Voltage
CTRL Voltage Hysterese
Internal Operating Frequency
Output Ripple and Noise
Maximum Capacitive Load
Condition
Min. Typ. Max.
Vin= min. to max.
5mA 7mA
0.4W
see calculation
0%
ON/OFF CTRL
50ms
DC-DC ON
DC-DC OFF
DC-DC OFF
Open or 2.8VDC<Vr<5VDC
GND or 0VDC<Vr<0.8VDC
1.8µA
20µA 35µA
2.4VDC
2.6VDC
2.8VDC
250mV
335kHz
385kHz
435kHz
20MHz BW
20mVp-p
30mVp-p
with normal start-up time, no external components
470µF
with <1 second start-up time + diode protection circuit
6800µF
Notes:
Note3: Operation under no load will not harm the converter, but specifications may not be met.
A minimum load of 10mA is recommended
Output Voltage Adjustability
Adjustment Resistor Values
R1 R2 R3 Vref(V)
1.8V 10KΩ 21KΩ 5.6KΩ 1.23
2.5V 22KΩ 21KΩ 5.6KΩ 1.23
3.3V 16.9KΩ 10KΩ 5.6KΩ 1.23
5.0V 30.9KΩ 10KΩ 10KΩ 1.23
+VIN
R2(R1 + R3) x (Vref - Vo) + Vref x R1R3
Trim down Rdown =
R2Vo - Vref (R1 + R2)
GND
Controlled IC
R1
R2 R3
+VOUT
Vadj
GND
Vref
Rdown
Rup
Trim up
R2R3 (Vref - Vo) + Vref R1 (R2 + R3)
Rup =
R2 (Vo - Vref) - Vref R1
100
90
80
70
60
50
40
30
20
10
0
4.75
Efficiency vs. Vin (full load)
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
7 9 11 13 15
Input Voltage [VDC]
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17 18
50
45
40
35
30
25
20
15
10
5
0
4.75
continued on next page
REV.: 5/2019
Ripple vs. Vin (full load)
5Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
7 9 11 13 15
Input Voltage [VDC]
17 18
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DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78AA-1.0
Series
Efficiency vs. Load (max. Vin)
100
90
80
70
60
50
40
30 5Vout
3.3Vout
20 2.5Vout
10
1.8Vout
1.5Vout
0
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
Ripple vs. Load (max. Vin)
50 5Vout
45
3.3Vout
2.5Vout
40 1.8Vout
1.5Vout
35
30
25
20
15
10
5
0
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
Efficiency vs. Load (min. Vin)
100
90
80
70
60
50
40
30 5Vout
20
3.3Vout
2.5Vout
10 1.8Vout
1.5Vout
0
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
Ripple vs. Load (min. Vin)
50 5Vout
45
3.3Vout
2.5Vout
40 1.8Vout
1.5Vout
35
30
25
20
15
10
5
0
0 10 20 30 40 50 60 70 80 90 100
Output Load [%]
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
Transient Response
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Condition
full load
low line to high line, full load
10% to 100% load
25mA/µs
100% <-> 50% load
REV.: 5/2019
Value
±2.0% typ. / ±3.0% max.
±0.2% typ. / ±0.4% max.
±0.7% typ. / ±1.0% max.
±85mV typ. / ±100mV max.
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R-78AA-1.0
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Series
PROTECTIONS
Parameter
Short Circuit Protection (SCP)
Short Circuit Input Current
Optional Diode Protection Circuit
Condition
nom. Vin= 12VDC
Optional Protection 1:
Value
+Vin +Vin R-78AcoAnxtixnuou+Vso,utautomatic re+cVovouet ry
-1.0SMD
120mA max.
CTRL GND
CTRL
OptGioNnDal Protection 2:
GND
Add a blocking diode to Vout if
current can flow backwards into
the output, as this can damage the
converter when it is powered down.
The diode can either be fitted
across the device if the source is
low impedance or fitted in series
with the output (recommended).
+Vin
CTRL
GND
+Vin R-78AAxx
-1.0SMD
CTRL GND
+Vout
+Vout
+Vin
CTRL
GND GND
+Vin R-78AAxx
-1.0SMD
CTRL GND Vadj
+Vout
+Vout
Trim output voltage
up 1 diode drop
GND
+Vin
+Vin R-78AAxx +Vout
-1.0SMD
CTRL GND Vadj
+Vout
CTRL
GND
Trim output voltage
up 1 diode drop
GND
ENVIRONMENTAL
Parameter
Operating Temperature Range
Maximum Case Temperature
Temperature Coefficient
Thermal Impedance
Operating Altitude
Operating Humidity
Pollution Degree
MTBF
Derating Graph
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Condition
with derating (see graph)
0.1m/s, horizontal
non-condensing
according to MIL-HDBK-217F, G.B.
+25°C
+ 71°C
100
90
80
70
60
50
40
30
20
10
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100
Ambient Temperature [°C]
85
REV.: 5/2019
Value
-40°C to +85°C
+100°C
±0.015%/°C
70°C/W
2000m
5% - 95% RH max.
PD2
13338 - 21070 x 103 hours
3880 - 6769 x 103 hours
I-4

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R-78AA-1.0
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
Series
SAFETY AND CERTIFICATIONS
Certificate Type (Safety)
Information Technology Equipment, General Requirements for Safety
EAC
RoHS 2+
Report / File Number
1603123
RU-AT.49.09571
Standard
IEC60950-1:2005, 2nd Edition + AM 2:2013
EN60950-1:2006 + AM 2:2013
TP TC 004/2011 TP TC 004/2011
RoHS 2011/65/EU + AM2015/863
EMC Compliance
Electromagnetic compatibility of multimedia equipment -
Emission requirements
ESD Electrostatic discharge immunity test
Radiated, radio-frequency, electromagnetic field immunity test
Condition
with external filter
Air ±8kV; Contact ±4kV
3V/m
Standard / Criterion
EN55032, Class B
EN61000-4-2
EN61000-4-3
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter
Material
Dimension (LxWxH)
Weight
Dimension Drawing (mm)
15.3
Type
case
PCB
Value
non-conductive black plastic, (UL94 V-2)
FR4, (UL94 V-1)
15.3 x 9.6 x 8.8mm
1.7g typ.
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15.0
0.50±0.05
2.54 x 4
12345
Bottom View
10 9 8 7 6
2.54 1.30
9.4
Recommended Footprint Details
10 9 8 7 6
Top View
12345
1.20
Pinning information
Pin # Single
1,2 +Vin
3,7,8,9
GND
4,5 +Vout
6 Vadj
10 CTRL
Tolerance:
xx.x= 0.5mm
xx.xx= ±0.25mm
REV.: 5/2019
I-5