Application Note November 2007 AN1372.0 ISL8500EVAL1Z intended in
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ISL8500EVAL1Z Regulator Standard Buck
Application Note November 2007 AN1372.0
ISL8500EVAL1Z intended individuals with requirements Point-of-Load applications sourcing from 4.5V 25V. ISL8500EVAL1Z evaluation board used demonstrate performance ISL8500 standard buck regulator. ISL8500 offered 4mmx3mm package with maximum height. complete converter occupies less than 0.425in2 area.
Recommended Equipment
following materials recommended perform testing: power supply with least source current capability, battery, notebook adapter electronic load capable sinking current Digital Multimeters (DMMs) 100MHz quad-trace oscilloscope Signal generator
Features
Standard Buck Controller with Integrated Switching Power MOSFET Integrated Boot Diode Input Voltage Range Fixed ±10% Variable 5.5V Output Voltage Adjustable from 0.6V with Continuous Output Current Voltage Mode Control with Voltage Feed Forward Fixed 500kHz Switching Frequency Externally Adjustable Soft-Start Time Output Undervoltage Protection PGOOD Output Overcurrent Protection Thermal Overload Protection Internal regulator
Quick Setup Guide
Ensure that circuit correctly connected supply loads prior applying power. Connect bias supply VIN, plus terminal (VIN) negative return (GND). Verify that ENABLE. Turn power supply. Verify output voltage 2.5V VOUT(TP3).
Evaluating Other Output Voltage
ISL8500EVAL outputs preset 2.5V; however, programmed using resistor dividers using Equation
0.6V 0.6V (EQ.
Applications
General Purpose WLAN Cards-PCMCIA, Cardbus32, MiniPCI CardsCompact Flash Cards Hand-Held Instruments
output voltage programming resistor will depend feedback resistor referred Figure value typically between 10k. output voltage desired 0.6V, then left opened.
VOUT
0.6V REFERENCE
What's Inside
Evaluation Board contains following materials: ISL8500 EVAL board ISL8500 datasheet
FIGURE EXTERNAL RESISTOR DIVIDER TABLE SWITCH SETTINGS
This EVAL document
ENABLE
OPERATING MODE Enable disable buck controller
CAUTION: These devices sensitive electrostatic discharge; follow proper Handling Procedures. 1-888-INTERSIL 1-888-468-3774 Intersil (and design) registered trademark Intersil Americas Inc. Copyright Intersil Americas Inc. 2007. Rights Reserved other trademarks mentioned property their respective owners.
Schematic
2.43K
2200PF
51.1K 10PF
470PF
10UF
OPEN
220UF
COMP
TP16
3.16K
2N7002
0.1UF
OPEN
BOOT
100UF
COMP
PHASE PHASE BOOT
TP13
100K
AN1372.0 November 2007
PHASE
0.1UF
10UH
VOUT
Application Note 1326
ISL8500IRZ
OPEN
POPULATE ONLY
Application Note 1326 ISL8500EVAL1Z Bill Materials
PART NUMBER ISL8500EVAL1ZREVAPCB H1044-00222-50V10-T H1065-00106-25V10-T H1082-00107-6R3V20-T REFERENCE UNITS DESIGNATOR DESCRIPTION MANUFACTURER MANUFACTURER PART ISL8500EVAL1ZREVAPCB ECJ-0EB1H222K C1206X5R250-106KNE
PWB-PCB, ISL8500EVAL1Z, TITAN REVA, ROHS CAP, SMD, 0402, 2200pF, 50V, 10%, X7R, ROHS CAP, SMD, 1206, 10µF, 25V, 10%, X5R, ROHS PANASONIC VENKEL
C11, C13, C20, POPULATE PURCHASE CAP, SMD, 1210, 100µF, 6.3V, 20%, X5R, ROHS PANASONIC C3225X5R0J107M ECJ-4YB0J107M 12106D107MAT C0402COG500-100JNE ECJ-0EB1H471K C0402X74500-471KNE GRM36X7R104K016AD C0402X7R160-104KNE ECJ1VB0J105K C1608X7R1H104K B340LB-13-F
H1044-00100-50V5-T H1044-00471-50V10-T
CAP, ,0402, 10pF, 50V, ,ROHS CAP, SMD, 0402, 470pF, 50V, 10%, X7R, ROHS
VENKEL PANASONIC VENKEL
H1044-00104-16V10-T
CAP, SMD, 0402, 0.1µF, 16V, MURATA 10%, X7R, ROHS VENKEL CAP, SMD, 0603, 1µF, 6.3V, 10%, X5R, ROHS CAPACITOR, SMD, 0603, 0.10µF, 50V, 10%, DIODE-SCHOTTKY SMD, SMB, 40V, ROHS LED-GaAs RED, SMD, 2x1.25mm, 100mW, 40mA, 10mcd, ROHS PANASONIC DIODES INC.
H1045-00105-6R3V10-T C1608X7R1H104K-T B340LB-13-F-T
LTST-C170CKT
LITEON/VISHAY ROHM
LTST-C170CKT SML-210LTT86
STANLEY ELECTRIC BR112H-TR IHLP2525CZRZ100M01 COIL-PWR INDUCTOR, SMD, 6.9x6.5, 10µH, 20%, ROHS VISHAY IHLP2525CZRZ100M01
2N7002-7-F-T
TRANSISTOR,N-CHANNEL, DIODES, INC. 3LD, SOT-23, 60V, 115mA, ROHS SEMICONDUCTOR RES, SMD, 0402, 51.1k, 1/16W, ROHS RES, SMD, 0402, 100k, 1/16W, TF,ROHS RES, SMD, 0402, 10k, 1/16W, TF,ROHS RES, SMD, 0603, 2.43k, 1/10W, ROHS RES, SMD, 0603, 10k, 1/10W, TF,ROHS PANASONIC VENKEL PANASONIC PANASONIC VENKEL VENKEL YAGEO VENKEL
2N7002-7-F 2N7002LT1G ERJ-2RKF5112X CR0402-16W-5112FT ERJ2RKF1003 ERJ-2RKF1002 CR0402-16W-1002FT CR0603-10W-2431FT RC0603FR-072K43L RK73H1JT1002F CR0603-10W-1002FT
H2510-05112-1/16W1-T
H2510-01003-1/16W1-T H2510-01002-1/16W1-T
H2511-02431-1/10W1-T
H2511-01002-1/10W1-T
AN1372.0 November 2007
Application Note 1326 ISL8500EVAL1Z Bill Materials (Continued)
PART NUMBER H2510-03010-1/16W1-T REFERENCE UNITS DESIGNATOR DESCRIPTION RES, SMD, 0402, 301, 1/16W, ROHS RES, SMD, 0603, DNPPLACE HOLDER, ROHS RES,SMD, 0402, 3.16k, 1/16W, ROHS VENKEL PANASONIC VISHAY/DALE 131-4353-00 SP1,SP2 CONN-SCOPE PROBE TEST COMPACT, MNT, ROHS SWITCH-TOGGLE, SMD, ULTRAMINI, SPST MINI CONN-MINI TEST POINT, VERTICAL, WHITE, ROHS TEKTRONIX CR0402-16W-3161FT ERJ-2RKF3161X CRCW04023K16FKED 131-4353-00 MANUFACTURER PANASONIC VENKEL MANUFACTURER PART ERJ-2RKF3010X CR0402-16W-3010-FT
H2511-DNP H2510-03161-1/16W1-T
GT11MSCBE-T 5002 1514-2 ISL8500IRZ
TP13,TP16 TP1-TP4
COMPONENTS GT11MSCKE KEYSTONE 5002 1514-2 ISL8500IRZ
CONN-TURRET, TERMINAL KEYSTONE POST, ROHS IC-2A BUCK REGULATOR, 12P, DFN, 4x3, ROHS INTERSIL
AN1372.0 November 2007
Application Note 1326 ISL8500EVAL1Z Board Layout
FIGURE COMPONENTS
FIGURE LAYER ETCH
AN1372.0 November 2007
Application Note 1326 ISL8500EVAL1Z Board Layout
(Continued)
FIGURE BOTTOM LAYER COMPONENTS (MIRRORED)
FIGURE BOTTOM LAYER ETCH (MIRRORED)
Intersil Corporation reserves right make changes circuit design, software and/or specifications time without notice. Accordingly, reader cautioned verify that Application Note Technical Brief current before proceeding.
information regarding Intersil Corporation products, www.intersil.com
AN1372.0 November 2007
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