WRN78XXT-1000
Series
WIDE INPUT, NON-ISOLATED & REGULATED SMD PACKAGE SINGLE OUTPUT
PRODUCT PROGRAM
Input Voltage(VDC)
Part Number
Nominal
WRN781.5T-1000
Range
Input
Current
(mA)
Output Voltage
(VDC)
Normal
Adjust
Range
Current
(mA)
Efficiency(%,Typ)
Efficiency
Vin
(min.)
Vin
(max.)
12
12
12
12
12
5.0-18
5.0-18
5.0-18
5.0-18
7.0-18
165
190
245
320
460
1.5
1.8
2.5
3.3
5.0
fixed
1.5-3.6
1.5-3.9
1.8-5.5
2.5-6.5
1000
1000
1000
1000
1000
1000
76
78
82
84
90
92
73
75
82
84
88
91
FEATURES
◆
Efficiency up to 92%
◆
No heatsink required
◆
1.0AMP SMD package
◆
Super low ripple and noise
◆
Adjustable output voltage
◆
Remote ON/OFF control
◆
Short circuit protection
◆
Low control current
◆
Operating temperature: -40℃~ +85℃
WRN781.8T-1000
WRN782.5T-1000
WRN7803T-1000
WRN7805T-1000
WRN786.5T-1000
12
8.5-18
580
6.5
fixed
Note: To adjust the output voltage must be met Vin-Vo>2V.
Input Current measured at nominal input voltage and rated output load.
INPUT SPECIFICATIONS
INPUT SPECIFICATIONS
Test Conditions
Item
Input Filter
Start Current(RMS)
Min.
Typ.
Max.
Units
Capacitor (10µF)
0.95
1.1
A
OUTPUT SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
Max.
Units
Output Voltage Accuracy
Input voltage range at full load
Nominal input,10% to 100% load
20MHz bandwidth
20MHz bandwidth(refer to Figure 6)
±2
±0.2
±0.4
20
10
±3
±0.5
±1.0
35
15
mVp-p
%
MODEL SELECTION
①
② ③
④
WRN78 05 T -1000
Line Regulation
Load Regulation
Ripple and Noise*
①Product
Series
②Output
Voltage
③SMD
Package Style
④Output
Current
Short Circuit Protection Mode
Short Circuit Protection
Inside Wasted
Thermal Shutdown
Output current limit
Switching Frequency
Hiccup Mode
Continuous, automatic recovery
0.5
Internal IC junction
150
1.8
PWM type
Input voltage range,10% to 100%
load
1
-40℃ ~ +85℃ ambient
1.4
±75
±100
100
3
±0.02
1000
ON
OFF
Open or 1.2<Vc<6V
Vc<0.6V
100
120
200
µA
200
W
℃
A
MHz
mV
µS
mA
%/℃
µF
APPLICATIONS
The WRN78xxT-1000 series with high efficiency
switching
regulators
are
ideally
supply
for
space
Transient peak deviation
Transient recovery time
Quiescent current
Temperature Coefficient
Max Capacitance Load
Remote ON/OFF
constrained mobile applications. There is no need for any
heatsinks. The additional features include remote ON/OFF
control and adjustable output voltage. Super low ripple
and noise of typically only 20mV and Low control current.
ON/OFF Control Current
Shutdown Input Current
ON: Open or 1.2<Vc≤6V
OFF:GND or Vc<0.4V
*Test ripple and noise by
“parallel
cable” method.
COMMON SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
Max.
Units
Storage humidity Range
Operating Temperature Range
Storage Temperature Range
Operating Case Temperature
Power derating(above 71℃)
-40
-55
95
+85
+125
+100
1.5mm from case for 10 seconds
260
Free Air Convection
%
℃
MICRODC reserves the copyright
Lead Temperature
Cooling
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 5
WRN78XXT-1000
Series
COMMON SPECIFICATIONS
Item
Test Conditions
Min.
Typ.
Max.
Units
TYPICAL TEMPERATURE CURVE
Plastic (UL94-V0)
Case Material
MTBF
Hop swap
Thermal resistance
Weight
(MIL-HDBK-217F,+25℃)
1000
k hours
Not supported
90
2.3
℃/
W
g
EMC SPECIFICATIONS
EN55022, CLASS A(without external circuit)
CE
EN55022, CLASS B(refer to Figure 4)
RE
ESD
EFT
Surge
EN55022, CLASS A(refer to Figure 5)
IEC/EN61000-4-2
IEC/EN61000-4-4
IEC/EN61000-4-5
Air
±8KV
/ Contact
±6KV
±2KV
±2KV
perf. Criteria B
perf. Criteria B(refer to Figure 4)
perf. Criteria B
TYPICAL APPLICATION CIRCUIT
RECOMMENDED REFLOW SOLDERING PROFILE
1. C1, C2 is required for best performance and should be fitted close to the converter pins.
2. The capacitance of C1, C2 sees external capacitor table, it can be increased properly if required, and
tantalum or low ESR electrolytic capacitors may also suffice.
3. No parallel connection or plug and play.
ADJUSTMENT RESISTOR VALUES
The R1, R2 in the above table are used to set the output voltage . If no need to adjust the output voltage, connect a ceramic capacitor to GND with 470pF typical value for increase
immunity. Insure the output voltage is in the adjust range or else may cause permanent damage to the device. Fine-tune output voltage must appease Vin-Vo>2V.
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 5
WRN78XXT-1000
Series
EMC RECOMMENDED CIRCUIT
TEST CONFIGURATIONS (TA=25
℃
)
(TA=25℃
APPLICATION EXAMPLE
To reduce output ripple, it is recommended to add a LC filter to output port.
L: Recommended parameter 10µH ~ 47µH.
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 3 of 5
WRN78XXT-1000
Series
CHARACTERISTIC CURVE
EMC TESTING WAVE SHAPE
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 4 of 5
WRN78XXT-1000
Series
OUTLINE DIMENSIONS & RECOMMENDED FOOTPRINT &PACKAGING
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT
TUBE OUTLINE DIMENSIONS
TAPINGREEL DIMENSIONS
RoHS COMPLIANT INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature
of 300°C for 10 seconds.
The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin
with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this
series are backward compatible with Sn/Pb soldering systems.
Microdc Professional Power Module,Inc.
Tel:0086-20-86000646
E-mail:tech@microdc.cn
Website:http://www.microdc.cn
REACH COMPLIANT INFORMATION
This series has proven that this product does not contain harmful chemicals, it also has
harmful chemical substances through the registration, inspection and approval.
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 5 of 5
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