WRN78XX-2000(B)
Series
WIDE INPUT NON-ISOLATED & REGULATED SINGLE OUTPUT
Product Program
Input Voltage(VDC)
Part Number
Nominal
Range
Voltage
(VDC)
Output
Current
(MA)
Efficiency(%,Typ)
Efficiency(%,Typ)
Vin
(min.)
Vin
(max.)
WRN781.5-2000
12
12
12
12
12
12
12
12
12
12
12
4.75-18
4.75-18
4.75-18
4.75-18
7-18
8.5-18
4.75-18
4.75-18
4.75-18
4.75-18
7-18
1.5
1.8
2.5
3.3
5
6.5
1.5
1.8
2.5
3.3
5
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
79
81
85
87
91
92
79
81
85
87
91
92
76
79
83
86
88
91
76
79
83
86
88
91
FEATURES
◆
Efficiency up to 92%,No heatsink required
◆
2A large current output
◆
Operating temperature : -40°C ~ +85°C
◆
Short circuit protection, thermal shutdown
◆
Low ripple and noise
◆
Micro miniature SIP3 package
◆
UL94-V0 requirement
◆
Ultra low power loss
◆
Industry standard pinout
◆
Pin-out compatible with WRN78xx linear
◆
MTBE>2000,000Hours
WRN781.8-2000
WRN782.5-2000
WRN7803-2000
WRN7805-2000
WRN786.5-2000
WRN781.5-2000B
WRN781.8-2000B
WRN782.5-2000B
WRN7803-2000B
WRN7805-2000B
WRN786.5-2000B
12
8.5-18
6.5
Add suffix "B" for 90°bend pins, for example: WRN7805-2000B.
OUTPUT SPECIFICATIONS
Item
Test conditions
Min.
Typ.
Max.
Units
Output voltage accuracy
Line regulation
Load regulation
100% full load, input voltage range
Vin=min. to max, at full load
10% to 100% load
20MHz bandwidth (refer to figure 6)
±2
±0.5
±0.5
25
0.5
±3
±0.75
±1.0
45
1.8
mVp-p
W
%
MODEL SELECTION
WRN78
①
05
②
-2000
③
(B)
④
①Product
Series
③Output
Current
②Output
Voltage
④Bend
90
°
pins
Ripple & Noise*
Short circuit input power
Short circuit protection
Thermal shutdown
Output current limit
Switching frequency
Quiescent current
Continuous, auto-recovery
Internal IC junction
150
5000
Full load, input voltage range
300
340
5
-40℃ ~ +85℃ ambient
380
10
±0.03
1000
℃
mA
KHz
mA
%/℃
µF
APPLICATIONS
The WRN78xx-2000(B) series switching regulators
are ideal replacement for WRN78xx linear regulators.. The
efficiency of up to 92% means that very little energy is
wasted as heat so there is no need for any heat sinks
with their additional space and mounting costs. They are
widely used in industrial control, instrumentation, and
electric power applications.
Temperature coefficient
Max capacitance load
*Test ripple and noise by "Parallel cable" method.
COMMON SPECIFICATIONS
Operating temp. range
Operating case temp.
Storage temp. range
Cooling
Lead temperature**
Storage humidity range
Case material
MTBF
Weight
Conducted emissions (Refer to Figure 5)
Radiated emissions
ESD
**1.5mm from case for 10 seconds
-40~+85℃（above 71℃ power derating)
+100
℃（max)
-55~+125℃
Free air convection
300℃（max)
≤95%
Plastic(UL94-V0)
> 2000k hours (25℃，MIL-HDBK-217F)
4.0g
EN55022
EN55022
CLASS B
CLASS B
EN61000-4-2 Level 3 6kV/8kV perf . Criteria B
MICRODC reserves the copyright
Note:
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 1 of 4
WRN78XX-2000(B)
Series
TYPICAL CHARECTERISTICS
EXTERNAL CAPACITOR TABL
Part Number
WRN7801-2000(B)
WRN78X2-2000(B)
WRN7802-2000(B)
WRN7803-2000(B)
WRN7805-2000(B)
C1
(Ceramic capacitor)
10µF/25V
10µF/25V
10µF/25V
10µF/25V
10µF/25V
10µF/25V
C2
(Ceramic capacitor)
22µF/6.3V
22µF/6.3V
22µF/6.3V
22µF/6.3V
22µF/16V
22µF/16V
(figure 1)
WRN78X6-2000(B)
TYPICAL APPLICATION CIRCUIT
Note:
1. C1 and C2 are required and should be fitted close to the converter pins.
2. The capacitance of C1and 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.
INPUT FILTER CIRCUIT CONNECT
(figure 3)
OUTPUT FILTER CIRCUIT CONNECT
(figure 4)
EMC RECOMMENDED CIRCUIT
(figure 5)
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 2 of 4
WRN78XX-2000(B)
Series
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
MECHANICAL DIMENSIONS
WRN78XX-2000
WRN78XX-2000
RECOMMENDED FOOTPRINT
WRN78XX-2000
WRN78XX-2000
WRN78XX-2000B
WRN78XX-2000
78XX-2000B
Note:
grid:2.54*2.54mm.
Note:
Unit:mm[inch]
Pin section tolerances:
±0.10mm[±0.004inch]
General tolerances:
±0.25mm[±0.010inch]
WRN78XX-2000B
WRN78XX-2000
78XX-2000B
TUBE OUTLINE DIMENSIONS
WRN78XX-2000
WRN78XX-2000B
Note:
Unit:mm[inch]
Pin section tolerances:
±0.10mm[±0.004inch]
General tolerances:
±0.25mm[±0.010inch]
Note:
Note:
Unit :mm[inch]
General tolerances:±0.50mm[±0.020inch]
L=530mm[20.866inch]
Devices per tube quantity: 44pcs
L=220mm[8.661inch]
Devices per tube quantity: 17pcs
Short tube inner packaging dimensions: L*W*H=255*170*80mm
Short tube outer packaging dimensions(with six inner packaging boxes):
L*W*H=375*280*270mm
Long tube inner packaging dimensions: L*W*H=580*200*100mm
Long tube outer packaging dimensions(with two inner packaging boxes):
L*W*H=600*215*220mm
Long tube outer packaging dimensions(with three inner packaging boxes):
L*W*H=600*215*325mm
1.All specifications measured at Ta=25℃, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
2. Only typical models listed, other models may be different, please contact our technical person for more details.
3. In this datasheet, all the test methods of indications are based on corporate standards.
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Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
Page 4 of 4
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