NCP1402
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16
Output Capacitor
The output capacitor is used for sustaining the output
voltage when the internal MOSFET is switched on and
smoothing the ripple voltage. Low ESR capacitor should be
used to reduce output ripple voltage. In general, a 47 mF to
68 mF low ESR (0.15 W to 0.30 W) Tantalum capacitor
should be appropriate. For applications where space is
a critical factor, two parallel 22 mF low profile SMD ceramic
capacitors can be used.
An evaluation board of NCP1402 has been made in the
size of 23 mm x 20 mm only, as shown in Figures 60 and 61.
Please contact your ON Semiconductor representative for
availability. The evaluation board schematic diagram, the
artwork and the silkscreen of the surface mount PCB are
shown below:
20 mm
20 mm
Figure 60. NCP1402 PFM Step−Up DC−DC Converter Evaluation Board Silkscreen
Figure 61. NCP1402 PFM Step−Up DC−DC Converter Evaluation Board Artwork (Component Side)
23 mm
23 mm
NCP1402
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17
Components Supplier
Parts Supplier Part Number Description Phone
Inductor, L1 Sumida Electric Co. Ltd. CD54−470L
Inductor 47 mH / 0.72 A
(852)−2880−6688
Schottky Diode, D1 ON Semiconductor Corp. MBR0520LT1 Schottky Power Rectifier (852)−2689−0088
Output Capacitor, C2 KEMET Electronics Corp. T494D686K010AS
Low ESR Tantalum Capacitor
68 mF / 10 V
(852)−2305−1168
Input Capacitor, C1 KEMET Electronics Corp. T491C106K016AS
Low Profile Tantalum Capacitor
10 mF / 16 V
(852)−2305−1168
PCB Layout Hints
Grounding
One point grounding should be used for the output power
return ground, the input power return ground, and the device
switch ground to reduce noise as shown in Figure 62, e.g.:
C2 GND, C1 GND, and U1 GND are connected at one point
in the evaluation board. The input ground and output ground
traces must be thick enough for current to flow through and
for reducing ground bounce.
Power Signal Traces
Low resistance conducting paths should be used for the
power carrying traces to reduce power loss so as to improve
efficiency (short and thick traces for connecting the inductor
L can also reduce stray inductance), e.g.: short and thick
traces listed below are used in the evaluation board:
1. Trace from TP1 to L1
2. Trace from L1 to Lx pin of U1
3. Trace from L1 to anode pin of D1
4. Trace from cathode pin of D1 to TP2
Output Capacitor
The output capacitor should be placed close to the output
terminals to obtain better smoothing effect on the output
ripple.
1
3
GND
CE
2
OUT
NC
4
LX
5
NCP1402
On
TP1
TP4
TP2
TP3
V
in
GND
V
out
GND
C2
68 mF/10 V
L1
47 mH
JP1
Enable
C1
10 mF/16 V
Off
D1
MBR0520LT1
Figure 62. NCP1402 Evaluation Board Schematic Diagram
++
ORDERING INFORMATION
Device Output Voltage Device Marking Package Shipping
NCP1402SN19T1G 1.9 V DAU
SOT23−5
(Pb−Free)
3,000 Units/Reel
NCP1402SN27T1G 2.7 V DAE
NCP1402SN30T1G 3.0 V DAF
NCP1402SN33T1G 3.3 V DAG
NCP1402SN40T1G 4.0 V DCR
NCP1402SN50T1G 5.0 V DAH
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
NOTE: The ordering information lists five standard output voltage device options. Additional device with output voltage ranging from 1.8 V to
5.0 V in 100 mV increments can be manufactured. Contact your ON Semiconductor representative for availability.
NCP1402
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18
PACKAGE DIMENSIONS
SOT23−5
(TSOP−5, SC59−5)
SN SUFFIX
CASE 483−02
ISSUE K
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH
THICKNESS. MINIMUM LEAD THICKNESS IS THE
MINIMUM THICKNESS OF BASE MATERIAL.
4. DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH, PROTRUSIONS, OR GATE BURRS. MOLD
FLASH, PROTRUSIONS, OR GATE BURRS SHALL NOT
EXCEED 0.15 PER SIDE. DIMENSION A.
5. OPTIONAL CONSTRUCTION: AN ADDITIONAL
TRIMMED LEAD IS ALLOWED IN THIS LOCATION.
TRIMMED LEAD NOT TO EXTEND MORE THAN 0.2
FROM BODY.
DIM MIN MAX
MILLIMETERS
A 3.00 BSC
B 1.50 BSC
C 0.90 1.10
D 0.25 0.50
G 0.95 BSC
H 0.01 0.10
J 0.10 0.26
K 0.20 0.60
M 0 10
S 2.50 3.00
123
54
S
A
G
B
D
H
C
J
__
0.7
0.028
1.0
0.039
ǒ
mm
inches
Ǔ
SCALE 10:1
0.95
0.037
2.4
0.094
1.9
0.074
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
0.20
5X
C AB
T0.10
2X
2X
T0.20
NOTE 5
C
SEATING
PLANE
0.05
K
M
DETAIL Z
DETAIL Z
TOP VIEW
SIDE VIEW
A
B
END VIEW
ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries.
SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed
at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation
or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets
and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended,
or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which
the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or
unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable
copyright laws and is not for resale in any manner.
P
UBLICATION ORDERING INFORMATION
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5817−1050
NCP1402/D
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: orderlit@onsemi.com
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your loc
al
Sales Representative

NCP1402SN19T1G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators 1.9V 200mA Boost PWM
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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