NCP1521B Adjustable Output Voltage Step
Contents
1. NCP1521BU 115 001 8 0202 ENABLE ON E j H LU Figure 6 Assembly Layer in uDFN 6 T1712 2 NCP152 FAN Yu Me 4 Figure 7 Part Layout TSOP 5 Figure 8 Part Layout in uDFN 6 http onsemi com 5 1521 Figure 9 Layer Routing TSOP 5 Figure 10 Top Layer Routing in uDFN 6 Figure 11 Ground Layer Routing in TSOP 5 Figure 12 Ground Layer Routing in uDFN 6 http onsemi com 6 1521 Figure 14 Power Layer Routing in uDFN 6 Figure 15 Bottom Layer Routing in TSOP 5 Figure 16 Bottom Layer Routing in uDFN 6 ON Semiconductor and are registered trademarks of Semiconductor Components Industries LLC SCILLC 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 ary 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 SCI2. You should see around 1 2 V 1 Jumper ENABLE should be open voltage operation 2 Jumper SELECT should be closed to 1 2 7 Remove the ENABLE jumper The DC current 3 Set the power supply to 3 6 V and the current limit measurement on line should be back around of at least 800 mA 0 3 uA Manufacturer Part Number TSOP5 ON Semiconductor NCP1521B UDFN NCP1521BU 0805 C1608X5R1A475 0603 C1608C0G1H180 1210 LPS3008 222NL Kontek Comatel 3110014000500 Cambion 160 1724 02 05 00 2 54mm TYCO AMP 5 826629 0 Molex Waldom 90120 0160 2 54mm TYCO AMP 4731955180470 Molex Waldom 90131 0140 10 16mm Harwin D3082 01 Molex Waldom 90120 0160 u TLS P 004 A 1106 BR TLS P 003 A 0207 BR NCP1521B BILL OF MATERIAL Toler Designator Qty Description Value ance 1 IC Converter DC DC 1 4 7 uF 10 V 0 Capacitor X5R 1 Ceramic 10 uF 6 3 V 0 Capacitor X5R 1 18 pF 50 V 5 capacitor COG SMD resistor 510k 1 SMD resistor 330k 1 SMD resistor 240k 1 ENABLE 1 3 Pin Jumper Header SELECT 1 3x2 Pin Jumper Header 0603 4 Test point type 3 TPVOUT 50 8mm x 50 8mm x 1 0 mm 4 Layers GND1 2 Jumper for GND GND2 http onsemi com 4 NCP1521BEVB NCP1521B PCB LAYOUT Board Reference TLS P 004 A 1106 BR Board Reference TLS P 003 A 0207 BR Lolo JEEP ee EPIS tmu om UN S soe Co cstit v 7 NCP 19218 1L 5 P 004 A 1106 BR
3. or 800 344 3860 Toll Free USA Canada Phone 421 33 790 2910 Fax 303 675 2176 or 800 344 3867 Toll Free USA Canada Japan Customer Focus Center For additional information please contact your local Email orderlit onsemi com Phone 81 3 5817 1050 Sales Representative EVBUM2104 D
4. ABLE 3 and ENABLE 2 OUTPUT POWER TEST POINT This is the test point of the inductor voltage This is the test point of the output voltage http onsemi com 2 CON2 VIN CON2 VIN TPVIN TP1 WY VIN C1 4 7uF GND1 GND2 JMP1 JMP2 CN TPVIN TP1 NY VIN C1 4 7uF GND1 GND2 JMP1 JMP2 N NCP1521BEVB NCP1521B BOARD SCHEMATIC TPLX TPVOUT TP3 TP4 Nx P U1 2 2uH VIN 1 5 SW VOUT VIN LX t 2 GND R1 C3 EN ae ra L4 510k 18pF NCP1521 C2 R4 4 7uF 250k gt TPEN ENABLE TP2 1 SELECT EN CON3x2 FIX Ast oO Figure 3 Board Schematic TSOP 5 FB TPLX TPVOUT TP3 Nx T 4 FB a 2 2uH VOUT 2 LX VIN 3 4 C3 VIN GND 510k 18pF NCP1521 FB C2 R4 4 7uF 250k gt E TP2 EDS SELECT CONSx1 VIN 1 CON3x2 e a H1 FIX Figure 4 Board Schematic uDFN 6 http onsemi com 3 VOUT CON2 H2 H4 FIX VOUT CON2 H2 H4 1521 NCP1521B TEST PROCEDURE Equipment needed 4 Connect the power supply connector to connectors e 10 pt Times ist bull2 Vint and The DC current measurement e Power supply Vin line should be around 0 3 uA 5 Close ENABLE connector The DC current measurement on line should be around 40 uA 6 Measure the output voltage between Vour e Digital Volt Meter e Digital Amp Meter Test Vour connectors
5. LLC 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 PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT American Technical Support 800 282 9855 Toll Free Semiconductor Website www onsemi com Literature Distribution Center for ON Semiconductor USA Canada P O Box 5163 Denver Colorado 80217 USA Europe Middle East and Africa Technical Support Order Literature http www onsemi com orderlit Phone 303 675 2175
6. NCP1521BEVB NCP1521B Adjustable Output Voltage Step Down Converter Evaluation Board User s Manual Overview The NCP1521B step down PWM DC DC converter is optimized for portable applications powered from one cell Li ion or three cell Alkaline NiCd NiMH batteries The part is available in adjustable output voltage versions ranging from 0 9 V to 3 3 V It uses synchronous rectification to increase efficiency and reduce external part count The device also has a built in 1 5 MHz nominal oscillator Figure 1 Board Picture in TSOP 5 Semiconductor Components Industries LLC 2012 April 2012 Rev 1 ON Semiconductor http onsemi com EVAL BOARD USER S MANUAL which reduces component size by allowing smaller inductors and capacitors Automatic switching PWM PFM mode offers improved system efficiency Additional features include integrated soft start cycle by cycle current limiting and thermal shutdown protection The NCP1521B is available in space saving low profile TSOP5 and UDFN6 packages NCPISZ71BU Lo Figure 2 Board Picture in uDFN 6 Publication Order Number EVBUM2104 D 1521 MAXIMUM RATINGS Maximum ratings are those values beyond which damage to the device may occur Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability Functional operation under absolute maximum rated conditions is not implied Functional oper
7. ation should be restricted to the Recommend Operating Conditions Note 1 ng Soh ae Thermal Resistance Junction to Air TSOP 5 Roja UDFN 6 C ZT x Latch up current maximum rating Ta 85 C Note 4 other pins ESD Withstand Voltage Note 3 Vesd Human Body Model 2 0 kV Machine Model 200 V Moisture Sensitivity Level Note 5 per IPC Stresses exceeding Maximum Ratings may damage the device Maximum Ratings are stress ratings only Functional operation above the Recommended Operating Conditions is not implied Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability 1 Maximum electrical ratings are defined as those values beyond which damage to the device may occur at TA 25 C 2 According JEDEC standard JESD22 A108B 3 This device series contains ESD protection and exceeds the following tests Human Body Model HBM per JEDEC standard JESD22 A114 Machine Model MM per JEDEC standard JESD22 A115 4 Latchup current maximum rating per JEDEC standard JESD78 5 Standard J STD 020A ELECTRICAL CHARACTERISTICS For Electrical Characteristic please see our NCP1521B datasheet available at http www onsemi com PowerSolutions product do id NCP1521B NCP1521B BOARD CONNECTIONS INPUT POWER SETUP ENABLE To enable the buck converter connect a shorting jumper between ENABLE 1 and ENABLE 2 To disable the buck converter connect a shorting jumper between EN
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