NCP1529ASNT1GEVB ON Semiconductor, NCP1529ASNT1GEVB Datasheet

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NCP1529ASNT1GEVB

Manufacturer Part Number
NCP1529ASNT1GEVB
Description
BOARD EVAL NCP1529
Manufacturer
ON Semiconductor
Datasheets

Specifications of NCP1529ASNT1GEVB

Design Resources
NCP1529ASNT1GEVB Schematic NCP1529ASNT1GEVB Gerber Files NCP1529ASNT1GEVB Bill of Materials
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
NCP1529EVB
1.7MHz, 1A, High Efficiency,
Low Ripple, Adjustable
Output Voltage Step-down
Converter Demonstration
Board
Prepared by: Stephanie SALLAUD
On Semiconductor
Overview
monolithic integrated circuit for portable applications
powered
Alkaline/NiCd/NiMH batteries.
from 0.9 V to 3.9 V – is able to deliver up to 1 A. It uses
synchronous rectification to increase efficiency and reduce
external part count. The device also has a built-in 1.7 MHz
(nominal) oscillator which reduces component size by
© Semiconductor Components Industries, LLC, 2008
January, 2008 - Rev. 0
The NCP1529 step-down DC-DC converter is a
The device – available in an adjustable output voltage
from
Figure 1. Board Picture in TSOP-5
one
cell
Li-ion
or
three
cell
1
allowing a small inductor and capacitors. Automatic
switching PWM/PFM mode offers improved system
efficiency.
cycle-by-cycle current limiting and thermal shutdown
protection. The NCP1529 is available in a space saving, low
profile 2x2 x 0.5 mm UDFN6 package and TSOP-5
package.
Additional features include integrated soft-start,
Figure 2. : Board Picture in UDFN-6
http://onsemi.com
Publication Order Number:
NCP1529EVB/D

Related parts for NCP1529ASNT1GEVB

NCP1529ASNT1GEVB Summary of contents

Page 1

... NCP1529EVB 1.7MHz, 1A, High Efficiency, Low Ripple, Adjustable Output Voltage Step-down Converter Demonstration Board Prepared by: Stephanie SALLAUD On Semiconductor Overview The NCP1529 step-down DC-DC converter is a monolithic integrated circuit for portable applications powered from one cell Li-ion Alkaline/NiCd/NiMH batteries. The device – available in an adjustable output voltage from 0 3.9 V – ...

Page 2

MAXIMUM RATINGS Rating Minimum Voltage All Pins Maximum Voltage All Pins (Note 1) Maximum Voltage EN, ENI2C, SDA, SCL Thermal Resistance, Junction-to-Air (TSOP-5 Package) Thermal Resistance using TSOP-5 Recommended Board Layout (Note 8) Thermal Resistance, Junction-to-Air (UDFN6 Package) Thermal Resistance ...

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NCP1529 - BOARD CONNECTIONS Symbol INPUT POWER VIN+ This is the positive connection for power supply. VIN- This is the return connection for the power supply GND1, GND2 Ground clip SETUP ENABLE To enable the buck converter, connect a shorting ...

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NCP1529 - BOARD SCHEMATIC VIN VIN ENABLE S1 VIN+ VIN CON1 C1 VIN- 10uF 1 CON1 FIX FIX FIX FIX GND1 GND2 JMP JMP ...

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VIN VIN ENABLE S1 VIN+ VIN CON1 C1 VIN- 4.7uF 1 CON1 GND1 GND2 JMP JMP 0 0 NCP1529EVB EN VIN VIN ...

Page 6

NCP1529 - TEST PROCEDURE Equipment Needed Power supply Digital Volt Meter Digital Amp Meter Test 1. Jumper ENABLE (and SELECT for the UDFN6 package) should be open. 2. Set the power supply to 3.6 V and the current limit of ...

Page 7

Increase Output current The part works in PWM mode with a low ripple: 9. Remove J5 connector. The DC current measurement on Vp line should be back around 0.3 mA. NCP1529EVB V V out Figure 5. ...

Page 8

Input Capacitor Selection In PWM operating mode, the input current is pulsating with large switching noise. Using an input bypass capacitor can reduce the peak current transients drawn from the input supply source, thereby reducing significantly. The capacitance needed for ...

Page 9

Feed-Forward Capacitor Selection The feed-forward capacitor sets the feedback loop response and is critical to obtain good loop stability. Given NCP1529EVB that the compensation is internally fixed ceramic capacitor is needed. Choose a small ceramic capacitor X7R ...

Page 10

... 2,54mm NA NA 10.16mm 1.60mm http://onsemi.com 10 Manufacturer Part Number Manufacturer ON Semiconductor NCP1529 TDK C1608X5R0J475 TDK C1608X5R0J106 TDK C1608C0G1H180 std std Vishay Spectrol 63M-T607-105 Coilcraft DO1605T-222MLB Emerson Network 111-2223-001 Power Connectivity Solutions TYCO/AMP 5-826629-0 Molex/Waldom 90120-0160 Harwin D3082-01 ...

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... 2,54mm NA NA 2,54mm NA NA 10,16mm 1,60mm http://onsemi.com 11 Manufacturer Part Number Manufacturer ON Semiconductor NCP1529 TDK C1608X5R0J475 TDK C1608X5R0J106 TDK C1608C0G1H180 std std Vishay Spectrol 63M-T607-105 Coilcraft DO1605T-222MLB Emerson Network 111-2223-001 Power Connectivity Solutions TYCO/AMP 5-826629-0 Molex/Waldom 90120-0160 TYCO/AMP 6-166591-5 Molex/Waldom ...

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Electrical Layout Considerations Implementing a high frequency DC-DC converter requires respect of some rules to get a powerful portable application. Good layout is key to prevent switching regulators to generate noise to application and to themselves. Electrical layout guide lines ...

Page 13

NCP1529 - PCB LAYOUT OF TSOP-5 DEMO BOARD Board reference: TLS-P-003-A-0907-BBR NCP1529EVB Figure 9. Assembly Layer in TSOP-5 http://onsemi.com 13 ...

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NCP1529EVB Figure 10. Part Layout in TSOP-5 Figure 11. Top Layer Routing in TSOP-5 http://onsemi.com 14 ...

Page 15

NCP1529EVB Figure 12. Ground Layer Routing in TSOP-5 Figure 13. Power Layer Routing in TSOP-5 http://onsemi.com 15 ...

Page 16

NCP1529EVB Figure 14. Bottom Layer Routing in TSOP-5 http://onsemi.com 16 ...

Page 17

NCP1529 - PCB LAYOUT OF UDFN-6 DEMO BOARD Board reference: TLS-P-003-A-0907-BBR NCP1529EVB Figure 15. : Assembly Layer in UDFN6 http://onsemi.com 17 ...

Page 18

NCP1529EVB Figure 16. Part Layout in DFN-6 Figure 17. Top Layer Routing in UDFN-6 http://onsemi.com 18 ...

Page 19

NCP1529EVB Figure 18. Ground Layer Routing in UDFN6 Figure 19. Power Layer Routing in UDFN-6 http://onsemi.com 19 ...

Page 20

... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT:  Literature Distribution Center for ON Semiconductor   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   ...

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