NCP1402_06 ONSEMI [ON Semiconductor], NCP1402_06 Datasheet

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NCP1402_06

Manufacturer Part Number
NCP1402_06
Description
200 mA, PFM Step−Up Micropower Switching Regulator
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet
1.NCP1402_06.pdf (18 pages)
NCP1402
200 mA, PFM Step−Up
Micropower Switching
Regulator
converter that are specially designed for powering portable equipment
from one or two cell battery packs.These devices are designed to
startup with a cell voltage of 0.8 V and operate down to less than
0.3 V. With only three external components, this series allow a simple
means to implement highly efficient converters that are capable of up
to 200 mA of output current at V
Modulation) oscillator, PFM controller, PFM comparator, soft−start,
voltage reference, feedback resistors, driver, and power MOSFET
switch with current limit protection. Additionally, a chip enable
feature is provided to power down the converter for extended battery
life.
package with five standard regulated output voltages. Additional
voltages that range from 1.8 V to 5.0 V in 100 mV steps can be
manufactured.
Features
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Typical Applications
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© Semiconductor Components Industries, LLC, 2006
March, 2006 − Rev. 7
The NCP1402 series are monolithic micropower step−up DC to DC
Each device consists of an on−chip PFM (Pulse Frequency
The NCP1402 device series are available in the Thin SOT−23−5
Extremely Low Startup Voltage of 0.8 V
Operation Down to Less than 0.3 V
High Efficiency 85% (V
Low Operating Current of 30 mA (V
Output Voltage Accuracy ± 2.5%
Low Converter Ripple with Typical 30 mV
Only Three External Components Are Required
Chip Enable Power Down Capability for Extended Battery Life
Micro Miniature Thin SOT−23−5 Packages
Pb−Free Packages are Available
Cellular Telephones
Pagers
Personal Digital Assistants (PDA)
Electronic Games
Portable Audio (MP3)
Camcorders
Digital Cameras
Handheld Instruments
in
= 2.0 V, V
in
= 2.0 V, V
OUT
OUT
= 1.9 V)
= 3.0 V, 70 mA)
OUT
= 3.0 V.
1
See detailed ordering and shipping information in the ordering
information section on page 3 of this data sheet.
(Note: Microdot may be in either location)
ORDERING INFORMATION
OUT
PIN CONNECTIONS AND
NC
CE
MARKING DIAGRAM
xxx = Marking
A
Y
W
G
http://onsemi.com
(TSOP−5, SC59−5)
5
1
2
3
= Assembly Location
= Year
= Work Week
= Pb−Free Package
SN SUFFIX
CASE 483
(Top View)
SOT23−5
Publication Order Number:
1
5
4
LX
GND
NCP1402/D

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NCP1402_06 Summary of contents

Page 1

NCP1402 200 mA, PFM Step−Up Micropower Switching Regulator The NCP1402 series are monolithic micropower step− converter that are specially designed for powering portable equipment from one or two cell battery packs.These devices are designed to startup with ...

Page 2

V in Figure 1. Typical Step−Up Converter Application OUT VOLTAGE REFERENCE GND 4 PIN FUNCTION DESCRIPTIONS Pin # Symbol 1 CE Chip Enable pin (1) The chip is enabled if a voltage which is equal to or ...

Page 3

ORDERING INFORMATION Device Output Voltage NCP1402SN19T1 NCP1402SN19T1G NCP1402SN27T1 NCP1402SN27T1G NCP1402SN30T1 NCP1402SN30T1G NCP1402SN33T1 NCP1402SN33T1G NCP1402SN40T1 NCP1402SN40T1G NCP1402SN50T1 NCP1402SN50T1G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, ...

Page 4

ELECTRICAL CHARACTERISTICS Characteristic OSCILLATOR Switch On Time (current limit not asserted) Switch Minimum Off Time Maximum Duty Cycle Minimum Startup Voltage ( mA) O Minimum Startup Voltage Temperature Coefficient (T Minimum Operation Hold Voltage ( mA) ...

Page 5

NCP1402SN19T1 2 1.7 1 100 120 140 160 180 200 I , OUTPUT CURRENT (mA) ...

Page 6

NCP1402SN19T1 0.96 OUT Open−Loop Test 1.6 −50 − TEMPERATURE (°C) Figure 9. NCP1402SN19T1 Output Voltage vs. Temperature 5.2 NCP1402SN50T1 0.96 OUT Open−Loop ...

Page 7

NCP1402SN19T1 0.96 OUT Open−Loop Test 5.0 −50 − TEMPERATURE (°C) Figure 15. NCP1402SN19T1 Switch On Time vs. Temperature 7.0 6.5 6.0 5.5 5.0 NCP1402SN50T1 V = 5.0 ...

Page 8

NCP1402SN19T1 1 0.96 OUT Open−Loop Test 40 −50 − TEMPERATURE (°C) Figure 21. NCP1402SN19T1 Maximum Duty Cycle vs. Temperature 100 NCP1402SN50T1 50 V ...

Page 9

NCP1402SN19T1 Open−Loop Test 0.0 −50 − TEMPERATURE (°C) Figure 27. NCP1402SN19T1 V LX vs. Temperature 1.0 0.8 0.6 0.4 0.2 NCP1402SN50T1 Open−Loop Test 0.0 −50 − TEMPERATURE (°C) Figure ...

Page 10

V start 0.8 NCP1402SN19T1 0 OUT 0.4 O 0.2 V hold 0.0 −50 − TEMPERATURE (°C) Figure 33. NCP1402SN19T1 Startup/Hold Voltage vs. Temperature 1.0 ...

Page 11

OUT 1.0 V/div mV/div, AC coupled OUT 100 ...

Page 12

mH OUT 1.9 V (AC coupled), 100 mV/div OUT 0 Figure 45. NCP1402SN19T1 Load Transient Response = ...

Page 13

NCP1402SN19T1 OUT T = 25° 1 0 100 120 140 ...

Page 14

V 125 100 INPUT VOLTAGE (V) in Figure 57. NCP1402SNXXT1 No Load Input Current vs. Input Voltage DETAILED OPERATING DESCRIPTION ...

Page 15

Step−up Converter Design Equations NCP1402 step−up DC−DC converter designed to operate in continuous conduction mode can be defined by: Calculation Equation OUT I Omax ( ...

Page 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 ...

Page 17

Components Supplier Parts Supplier Inductor, L1 Sumida Electric Co. Ltd. Schottky Diode Semiconductor Corp. Output Capacitor, C2 KEMET Electronics Corp. T494D686K010AS Input Capacitor, C1 KEMET Electronics Corp. T491C106K016AS PCB Layout Hints Grounding One point grounding should be used ...

Page 18

0.05 (0.002) H *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered ...

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