Datasheet

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date
05/16/2016
page
1 of 6
SERIES: P78A-1000 │ DESCRIPTION: DC-DC CONVERTER
FEATURES
•
•
•
•
•
•
•
•
•
•
up to 1 A current output
pin compatible with LM78XX linear regulators
non-isolated switching regulator
wide input voltage range
efficiency up to 91%
low ripple and noise
short circuit protection
ultra-compact SIP3 package
low profile
-40°C to +85°C temperature range
MODEL
input
voltage
output
voltage
output
current
output
power
ripple
& noise1
efficiency2
typ
(Vdc)
range
(Vdc)
(Vdc)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
P78A03-1000
24
7~28
3.3
1000
3.3
120
87
P78A05-1000
24
8~28
5
1000
5
120
91
Notes:
1. At full load, nominal input, 20 MHz bandwidth oscilloscope, output terminated with a 0.1 µF multilayer low ESR ceramic capacitor.
2. At min Vin.
3. All specifications measured at: Ta=25°C, nominal input voltage, rated output load, and after warm up unless otherwise specified.
PART NUMBER KEY
P78A XX - 1000
Base Number
Output Voltage
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Output Current
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CUI Inc │ SERIES: P78A-1000 │ DESCRIPTION: DC-DC CONVERTER
date 05/16/2016 │ page 2 of 6
INPUT
parameter
conditions/description
operating input voltage
3.3 Vdc model
5 Vdc model
no load input current
Vin = 24 Vdc
min
typ
max
units
7
8
24
24
28
28
Vdc
Vdc
1.5
mA
OUTPUT
parameter
conditions/description
min
typ
maximum capacitive load
1
line regulation
measured from low to high line, full load
load regulation
measured from 10~100% load, typical Vin
voltage accuracy
switching frequency
Note:
±3
Vin = 12 Vdc
max
units
220
μF
±1
%
±1.5
%
±5
%
330
kHz
1. Maximum capacitive load is tested at nominal input voltage and full load.
PROTECTIONS
parameter
conditions/description
min
over current protection
output shut down, auto recovery
short circuit protection
output shut down, auto recovery
typ
max
units
200
%
SAFETY AND COMPLIANCE
parameter
conditions/description
MTBF
as per MIL-HDBK-217F, full load, 25 °C
min
RoHS
2011/65/EU
typ
max
3,875,000
units
hours
ENVIRONMENTAL
parameter
conditions/description
min
operating temperature
see derating curve
storage temperature
operating humidity
typ
max
units
-40
85
°C
-55
125
°C
95
%
max
units
260
°C
non-condensing
SOLDERABILITY
parameter
conditions/description
wave soldering
see wave solder profile
Note:
min
2. The wave solder profile is measured on lead temperature.
3. Need to keep the solder parts internal temperature less than about 210°C.
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typ
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CUI Inc │ SERIES: P78A-1000 │ DESCRIPTION: DC-DC CONVERTER
date 05/16/2016 │ page 3 of 6
MECHANICAL
parameter
conditions/description
dimensions
11.6 x 8.5 x 10.4
min
case material
non-conductive black plastic (UL94V-0)
potting material
epoxy (UL94V-0)
typ
max
units
mm
weight
2
g
MECHANICAL DRAWING
units: mm
tolerance: XX.X=±0.50 mm
XX.XX=±0.25 mm
11.6
2
GND
3
-Vout
xxxx
xxxx
Marking
1 2 3
0.25
0.7 typ.
Ø1.00 +0.15/-0
2.54
+Vin
0.51
1
8.5
4.10
Function
2.0
PIN
10.4
PIN CONNECTIONS
2.54
3.21 5.08
Recommended PCB Layout
Top View
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CUI Inc │ SERIES: P78A-1000 │ DESCRIPTION: DC-DC CONVERTER
date 05/16/2016 │ page 4 of 6
DERATING CURVE
Temperature Derating Curve
Load (%)
100
80
60
Safe operating area
40
20
-40
-20
0
20
40
60
80 85 100
120
Ambient Temperature (°C)
EFFICIENCY CURVES
Efficiency vs. Load
5 Vdc output model
Efficiency vs. Load
3.3 Vdc output model
100
100
95
Efficiency (%)
Efficiency (%)
95
90
85
7 Vdc input
12 Vdc input
24 Vdc input
28 Vdc input
80
75
0
0.2
0.4
0.6
0.8
90
85
80
8 Vdc input
12 Vdc input
24 Vdc input
28 Vdc input
75
1.0
Output Current (A)
70
0
0.2
0.4
0.6
Output Current (A)
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0.8
1.0
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CUI Inc │ SERIES: P78A-1000 │ DESCRIPTION: DC-DC CONVERTER
date 05/16/2016 │ page 5 of 6
APPLICATION CIRCUIT
Figure 1
+VIN
+VOUT
C1
C2
GND
GND
Table 1
Optional External
Components
Notes:
C1
10μF MLCC
C2
10μF MLCC
1. To protect the converter during power-up, use soft start power supply.
2. The converter cannot be used as a positive to negative converter.
PACKAGING
units: mm
Tube Size: 520 x 16.5 x 9.3 mm
QTY: 42 pcs
16.5±0.5
12.1±0.5
9.3±0.5
0.5±0.2
4.9±0.5
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CUI Inc │ SERIES: P78A-1000 │ DESCRIPTION: DC-DC CONVERTER
date 05/16/2016 │ page 6 of 6
REVISION HISTORY
rev.
1.0
description
date
initial release
05/16/2016
The revision history provided is for informational purposes only and is believed to be accurate.
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