K78XXT-1000 Series
WIDE INPUT, NON-ISOLATED & REGULATED
SMD PACKAGE SINGLE OUTPUT
Patent Protection RoHS
PART NUMBER SYSTEM
K7805T-1000
Output Current
Package Style
Output Voltage
Product Series
FEATURES
●
Efficiency up to 93%
●
Low ripple and noise
●
1.0AMP SMD package
●
Low ripple and noise
●
Adjustable output voltage
●
Remote ON/OFF control
●
Short circuit protection
●
Low shutdown current
●
Operating temperature range: -40°C ~ +85°C
APPLICATIONS
The K78XXT-1000 series with high efficiency switching
regulators are ideally supply for space 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 shutdown current.
SELECTION GUIDE
Input Voltage(VDC)
Model
Nominal
K7801T-1000
K78X2T-1000
K7802T-1000
12
K7803T-1000
K7805T-1000
K78X6T-1000
5.0-18
7.0-18
8.5-18
320
460
580
3.3
5.0
6.5
1.8-5.5
2.5-6.5
fixed
Range
4.75-15
4.75-15
5.0-18
Input Current
(mA)
165
190
245
Output Voltage(VDC)
Nominal
1.5
1.8
2.5
Adjust Range
fixed
1.5-3.6
1.5-3.9
1000
84
90
93
84
88
91
Output Current
(mA)
Efficiency (%,max)
Vin(Min)
76
79
83
Vin (Max)
74
77
81
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
Item
No-load Input Power
Reverse Input
Input Filter
Test Conditions
Min.
--
Typ.
0.018
Forbid
Capacitance Filter (1μF)
Max.
0.054
Unit
W
OUTPUT SPECIFICATIONS
Item
Output Voltage accuracy
100% load, input voltage range
Line Regulation
Load Regulation
Switching Frequency
Output Current Limit
Temperature Drift
Ripple & Noise*
20MHz bandwidth (Refer to Figure 4)
Over-temperature protect
Transient peak deviation
Transient recovery time
IC inside
Nominal input, from 10% to 100% load
--
--
--
--
10
150
±75
--
15
--
±100
100
℃
mV
μS
-40℃½+85
℃
20MHz bandwidth
Nominal input, from 10% to 100% load
PWM type
--
--
--
--
--
--
Test Conditions
Min.
--
Typ.
±2
±0.2
±0.4
1.4
1.8
--
20
Max.
±3
±0.5
±1.0
--
--
±0.02
35
mVp-p
MHz
A
%/°C
%
Unit
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78XXT-1000
A/2-2012
Page 1 of 6
Short Circuit Protection
Max. Capacitive Load
ON
ON/OFF Control Voltage
OFF
ON/OFF Control Current
Shutdown Input Current
ON: Open or 1.2<Vc≤6V
OFF:GND or Vc<0.4V
--
--
--
Hiccup Mode, Continuous, automatic recovery
--
1000
µF
Open or 1.2V<Vc<6V
Vc<0.6V
100
120
200
200
μA
Note:* Ripple and noise tested by
“parallel
cable” method. See detailed operation instructions at Testing of Power Converter section, application notes.
COMMON SPECIFICATIONS
Item
MTBF
Hop swap
Case material
Weight
--
Test Conditions
MIL-HDBK-217F@25℃
Min.
1000
Typ.
--
Forbid
Plastic (UL94-V0)
2.3
--
g
Max.
--
Unit
K hours
ENVIRONMENTAL SPECIFICATIONS
Item
Storage Humidity
Operating Temperature
Storage Temperature
The Max. Case Temperature
Lead Temperature
Cooling
Operating temperature curve range
1.5mm from case for 10 seconds
Test Conditions
Non condensing
Power derating (above 71℃)
Min.
--
-40
-55
--
--
Typ.
--
--
--
--
--
Max.
95
+85
+125
100
260
°C
Unit
%
Free air convection
EMC SPECIFICATIONS
CISPR22/EN55022
CE
EMI
RE
ESD
RS
EFT
EMS
Surge
CS
Voltage dips、short and
interruptions immunity
CISPR22/EN55022
CISPR22/EN55022
IEC/EN 61000-4-2
IEC/EN 61000-4-3
IEC/EN 61000-4-4
IEC/EN 61000-4-5
IEC/EN 61000-4-6
CLASS B
CLASS A
(External Circuit Refer to Figure1-②)
(External Circuit Refer to Figure1-②)
perf. Criteria B
perf. CriteriaA
perf. Criteria B (External Circuit Refer to Figure1-①)
perf. Criteria B (External Circuit Refer to Figure1-①)
perf. Criteria A
perf. Criteria B
CLASS A
(Without External Circuit)
Contact
±6KV/
Air
±8KV
10V/m
±2KV
±2KV
3Vr.ms
IEC/EN 61000-4-29 0%-70%
EMC RECOMMENDED CIRCUIT
FUSE
V in
+
MOV
GND
TVS
C1
C0
LDM1
LDM2
+Vin
EUT
GND
+Vout
LOAD
①
Recommended external circuit parameters:
FUSE
MOV
LDM1
TVS
C0
C1
②
(Figure 1)
Choose according to
practical input current
10D560
82µH
SMCJ36A
120µF/50V
4.7µF/50V
LDM2
33µH
Note: In Figure 1,part①is EMS Recommended external circuit, part②is EMI recommended external circuit. Choose according to requirements.
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78XXT-1000
A/2-2012
Page 2 of 6
EMC RECOMMENDED CIRCUIT PCB LAYOUT
(Figure 2)
EMC TEST WAVEFORM
CE (Without external circuit)
CE (refer to Figure 1)
TYPICAL APPLICATION CIRCUIT
Vin
1
K7805T-1000
10
7,9
6
Vo ut
5
Part
Number
R1
C2
EXTERNAL CAPACITOR TABLE
C1
C2
(Ceramic Capacitor) (Ceramic Capacitor)
10μF/25V
22μF/16V
C1
K78XXT-1000
ON/OFF
G ND
C4
470pF
R2
G ND
(Figure 3)
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
Part Number
Vo (Nominal)
Vadj (V)
1.5
1.8
2.5
3.0
3.3
3.6
3.9
4.5
4.9
5.0
5.1
5.5
6.0
6.5
R1(KΩ)
188.1
-
-
-
-
-
-
-
-
-
-
-
-
-
K78X2T-1000
1.8(V)
R2(KΩ)
-
-
81.4
32.2
18.6
9.5
-
-
-
-
-
-
-
-
R1(KΩ)
15.4
68.6
-
-
-
-
-
-
-
-
-
-
-
-
K7802T-1000
2.5(V)
R2(KΩ)
-
-
-
88.7
41.3
20.1
8.0
-
-
-
-
-
-
-
R1(KΩ)
-
15.4
87
339
-
-
-
-
-
-
-
-
-
-
K7803T-1000
3.3(V)
R2(KΩ)
-
-
-
-
-
121
51.0
16.6
8.0
6.5
5.2
1.1
-
-
R1(KΩ)
-
-
9.7
30.5
48.8
75
115
338
1835
-
-
-
-
-
K7805T-1000
5.0(V)
R2(KΩ)
-
-
-
-
-
-
-
-
-
-
426
58.7
16.9
3.2
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.
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78XXT-1000
A/2-2012
Page 3 of 6
TEST CONFIGURATIONS (TA=25°C)
1.
Efficiency and Output Voltage Ripple Test
2 5 .4 m m
2 5 .4 m m
1 2 .7 m m
Vin
1
C1
Tantal um
DC/DC
Converter
7, 9
C4
5
C2
+V o u t
C o p p e r strip
Ceramic
2.54mm
6
470p F
Ce ra m ic
1
μ
F
1 0
μ
F
Scope
GND
Co p p e r s trip
(Figure 4)
2．
Start-up and Load Transient Response Test
5 0.8 m m
Vin
1
C1
DC/DC
Co nverte r
7,9
C4
5
C2
+Vou t
C opp er s trip
2.54 mm
6
4 70 pF
C e ram i c
Scope
GND
Co ppe r s tr ip
(Figure 5)
APPLICATION EXAMPLE
Vin
C1
C2
2 2
μ
F
C4
470 pF
GND
(Figure 6)
To reduce output ripple, it is recommended to add a LC filter to output port.
L: Recommended parameter 10μH ~ 47μH.
TYPICAL TEMPERATURE CURVE
120
RECOMMENDED REFLOW SOLDERING PROFILE
250
Peak.Temp 240 C
10 Sec Max
220 C
90 Sec Max
( >220 C)
Output Power (%)
80
60
Safe Operating Area
Temp e ra tu re ( C )
100
200
150
40
20
0
-40
0
40
71 85
120
100
50
0
Operating Temp.(
°C
)
Time (sec.)
TYPICAL
CHARACTER CURVE
Efficiency VS.Vin(full load)
100
90
80
70
60
50
40
30
20
10
0
4.75
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Ripple VS.Vin(full load)
30
25
K7801T-1000
K78X2T-1000
K7802T-1000
K7803T-1000
K7805T-1000
K78X6T-1000
Load
DC/DC
1 Co nverte r
7 ,9
6
L
5
+Vo u t
Load
Load
Efficiency(%)
Rippple(mV)
20
15
10
5
0
5
6
7
8
9
10
11
12
13
14
15
16
17
4.75
K7801T-1000
K78X2T-1000
K7802T-1000
K7803T-1000
K7805T-1000
K78X6T-1000
Vin(V)
Vin(V)
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78XXT-1000
A/2-2012
18
Page 4 of 6
Efficiency VS.Load(Vin=Vin-nominal)
100
90
80
25
20
Ripple VS.Load(Vin=Vin-nominal)
Efficiency(%)
70
60
50
40
30
20
10
0
0
100 200 300 400 500 600 700
800 900 1000
Rippple(mV)
K7801T-1000
K78X2T-1000
K7802T-1000
K7803T-1000
K7805T-1000
K78X6T-1000
15
10
5
0
0
100 200 300 400 500 600 700 800 900 1000
K7801T-1000
K78X2T-1000
K7802T-1000
K7803T-1000
K7805T-1000
K78X6T-1000
Load(mA)
Load(mA)
OUTLINE DIMENSIONS, RECOMMENDED FOOTPRINT & PACKAGING
MECHANICAL DIMENSIONS
15.24±0.50
[0.60±0.020]
5.08
[0.200]
0.25±0.10
[0.010±0.004]
10.16[0.400]
RECOMMENDED FOOTPRINT
10.16[0.400]
5.08
[0.200]
A
7
6
8.50±0.20
[0.335±0.008]
(Top View)
1
5
1.80[0.070]
1
5
0.60±0.10
[0.024±0.004]
2.54±0.20
[0.10±0.008]
10.05±0.20
[0.396±0.008]
(Side View)
7.25
[0.285]
7.00
[0.276]
1.00[0.039]
(Front View)
2.70
[0.106]
1.15±0.20
[0.045±0.008]
1.87±0.20
[0.074±0.008]
12.10±0.30
[0.476±0.012]
A
FOOTPRINT DETAILS
Pin
1
7,9
5
6
10
Function
Vin
GND
Vout
Vadj
ON/OFF
0.10[0.004]
Note:
Unit:mm[inch]
Pin section tolerances:±0.10mm[±0.004inch]
General tolerances:±0.25mm[±0.010inch]
Note:
grid 2.54*2.54mm
TUBE OUTLINE DIMENSIONS
TAPINGREEL DIMENSIONS
Taping dimension:
∅1.50
[0.059]
2.00 [0.079]
1.75 [0.069]
11.50 [0.453]
0.50 [0.020]
15.10[0.594]
15.65
[0.616]
24.00
[0.945]
12.40
[0.488]
16.00
[0.630]
∅1.50
[0.059]
10.70[0.421]
9.50 [0.374]
6.70 [0.264]
10.50 [0.413]
11.02[0.434]
10
9
0~5
10 9
7
6
7.65 [0.301]
Taping reel dimension:
4.72 [0.186]
29.40 [1.157]
∅100.00[3.937]
Note:
Unit :mm[inch]
General tolerances:
±0.50mm[±0.020inch]
L=530mm[20.866inch] Devices per tube quantity: 33pcs
L=220mm[8.661inch] Devices per tube quantity: 13pcs
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.
∅13.00
[0.512]
Note:
Unit :mm[inch]
General tolerances:
±0.50mm[±0.020inch]
Devices per reel quantity:500pcs
Inner packaging dimensions: L*W*H=365*350*105mm
;
Devices per tube quantity: 2000pcs
Outer packaging dimensions: L*W*H=390*360*245mm.
Devices per tube quantity: 4000pcs
∅21.50
[0.846]
The copyright and authority for the interpretation of the products are reserved by MORNSUN
K78XXT-1000
A/2-2012
∅330.00[12.992]
Page 5 of 6
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