Datasheets for HDD semiconductors, regulators, op-amps

2SA1242, Toshiba, 20V, 5A, PNP transistor:
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-39&file=DSA-762432.pdf&scan=
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-39/DSA-762432.pdf
http://www.i-t.com/graphics/2sa1242.pdf

2SA1615, NEC, switching, PNP transistor, 20V, 10A:
http://www.datasheetcatalog.org/datasheet2/7/0y5q9up5kxyeosf34ihildwipewy.pdf

2SB1132, PNP transistor, marking BA, Rohm, -32V, -1A, 0.2V VCE(sat), Q marking = 120-270 hfe:
http://www1.futureelectronics.com/doc/ROHM%20SEMICONDUCTOR/2SB1132T100Q.pdf
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheet-065&file=DSA00233018.pdf&scan=n

2SB1412, ROHM Electronics, PNP, -20V, -5A, transistor, low VCE(sat):
http://www.rohm.com/products/databook/tr/pdf/2sb1412.pdf

2SB962, NEC, 30V, 3A, PNP transistor:
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-22/DSA-433544.pdf

2SC2412K / 2SC4081 / 2SC4617 / 2SC5658 / 2SC1740S, general purpose NPN transistor (50V, 0.15A), Rohm, marking BR:
http://www.rohm.com/products/databook/tr/pdf/2sc2412k.pdf
http://www.s-manuals.com/smd-files/pdf/2/2sc1740s,_2sc2412k,_2sc4081,_2sc4617,_2sc5658_r.pdf

2SC3072, Toshiba, 20V, 5A, NPN transistor:
http://www.toshiba.com/taec/components2/Datasheet_Sync//66/7741.pdf

2SC6052, Toshiba, NPN, transistor:
http://www.toshiba.co.jp/mtdevice/pdf/0506102SC6052.pdf

2SD1664, NPN transistor, marking DA, Rohm, 32V, 1A, 0.15V VCE(sat), Q marking = 120-270 hfe, R = 180-390:
http://www.datasheetcatalog.org/datasheet/rohm/2sd1664.pdf

2SD1758, Rohm, Medium Power Transistor (32V, 2A):
http://www.rohm.com/products/databook/tr/pdf/2sd1758.pdf
http://www1.futureelectronics.com/doc/ROHM%20SEMICONDUCTOR/2SD1758TLQ.pdf

2SD1760, Rohm, Power Transistor (50V, 3A):
http://www.anglia.com/rohm/datasheets/2sd1760.pdf
http://www.datasheetcatalog.org/datasheet/rohm/2sd1760.pdf

2SD2098, Rohm, Low VCE(sat) NPN transistor, marking DJ, 20V 5A:
http://www.s-manuals.com/smd-files/pdf/2/2sd2098_r.pdf
http://www.datasheetarchive.com/dl/Datasheets-27/DSA-527608.pdf

2SD2118R, ROHM Electronics, 20V, 5A, Low VCE(sat) NPN Transistor (strobe flash):
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-8/DSA-159007.pdf

2SD2150, Rohm, NPN Low Frequency Transistor, 20V, 3A, marking CF, R = 180 to 390 hfe:
http://www.rohm.com/products/databook/tr/pdf/2sd2150.pdf
http://www.s-manuals.com/smd-files/pdf/2/2sd2150_r.pdf

78L08A, positive 8V linear regulator
UA78L08A, Texas Instruments, 8V, 100mA Fixed Positive Voltage Regulator:
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-35&file=DSA-693329.pdf&scan=

78M08A, 8V linear regulator

AO4616, Alpha & Omega Semiconductor,30V Complementary MOSFET, N-Channel 30V 8A, P-Channel 30V 7A:
http://www.aosmd.com/pdfs/datasheet/AO4616.pdf

AO4619, Alpha & Omega, Complementary Enhancement Mode FET, N-ch 30V 7.4A, P-ch -30V -5.2A:
http://www.aosmd.com/res/data_sheets/AO4619.pdf
http://aosmd.com/res/markings/AO4619.pdf (marking description)

AO4620, Alpha & Omega, Complementary Enhancement Mode FET, N-ch 30V 7.2A, P-ch -30V -5.3A:
http://www.aosmd.com/res/data_sheets/AO4620.pdf

AP1506-50, Anachip Corp, 5.0V, 150Khz, 3A PWM buck DC/DC converter:
http://www.diodes.com/datasheets/AP1506.pdf

APM4532 / APM4532K, Anpec, Dual Enhancement Mode MOSFET (N-and P-Channel), N-Channel 30V/5A, P-Channel -30V/-3.5A:
http://www.anpec.com.tw/ashx_prod_file.ashx?prod_id=242&file_path=20081002153109520.pdf&original_name=APM4532K.pdf
http://www.datasheetcatalog.org/datasheets2/21/210443_1.pdf

B240, 2.0A, 40V, Diodes Inc, surface mount Schottky barrier rectifier:
http://www.diodes.com/datasheets/ds13004.pdf

BAS31, Small Signal Diode, marking L21, 120V, 200mA, 350mW:
http://www.fairchildsemi.com/ds/BA%2FBAS31.pdf
http://www.nxp.com/documents/data_sheet/BAS29_31_35.pdf

BC868-25, Philips / NXP, marking CDC, NPN medium power transistor, 20 V, 1 A, SOT-89:
http://www.nxp.com/documents/data_sheet/BC868.pdf

BSP100, 30V 6A, N-ch enhancement mode TrenchMOS transistor, Philips / NXP:
http://www.nxp.com/documents/data_sheet/BSP100.pdf
http://www.datasheetcatalog.org/datasheet/philips/BSP100_3.pdf

FAN1537PA, Fairchild, Dual 1A Adjustable/Fixed Low Dropout Linear Regulators, 3.3V & 2.5V:
http://www.datasheetcatalog.org/datasheet/fairchild/FAN1537A.pdf
http://www.gaw.ru/pdf/Fairchild/voltage_reg/FAN1537.pdf

FAN4274, Fairchild, Dual, Rail-to-Rail I/O, CMOS Amplifier, 5V, marking 4274:
http://www.fairchildsemi.com/ds/FA/FAN4274.pdf

FDFS2P102A, Integrated P-Channel PowerTrench® MOSFET and Schottky Diode, Fairchild, 20V, 3.3A:
http://sluzhebka.com/DataSheet/FDFS2P102A.pdf

FDFS6N303, FETKEY N-Channel MOSFET with Schottky Diode, Fairchild:
http://www.datasheetcatalog.org/datasheet/fairchild/FDFS6N303.pdf
http://www.industry.su/FAIRCHILD/PDF/FDFS6N303.pdf

FDS6961A, Dual N-Channel Logic Level PowerTrench TM MOSFET, 3.5 A, 30 V:
http://www.fairchildsemi.com/ds/FD/FDS6961A.pdf

FDS9431A, P-Channel 2.5V Specified MOSFET, Fairchild Semiconductor, 3.5A, 20V, 0.18 ohm RDSon:
http://www.fairchildsemi.com/ds/FD/FDS9431A.pdf

FDT434P, P-Channel 2.5V Specified PowerTrench MOSFET, Fairchild, 5.5A, 20V, marking 434:
http://www.fairchildsemi.com/ds/FD/FDT434P.pdf

FJD3076, NPN transistor, 40V, 2A, lo-sat, marking J3076:
http://fairchildsemi.tv/ds/FJ/FJD3076.pdf

FW503, Sanyo, W503 marking code, 20V, 3A, P-ch Silicon MOSFET & Schottky Barrier Diode:
http://datasheet.digchip.com/413/413-3502-FW503.pdf
http://www.datasheetcatalog.org/datasheet2/b/0ftpi2xu2g38gydr2dcykw6g19fy.pdf
http://www.semiconductor-sanyo.com/pamph_pdf_e/EP124A.pdf

IRF7101, International Rectifier, Dual N-Channel MOSFET, 20V, 3.5A, Rdson = 0.10 ohms:
http://www.irf.com/product-info/datasheets/data/irf7101.pdf
http://store.iiic.cc/catalog/ir/IRF7101.pdf

IRF7207, P-Channel MOSFET, 20V, 5A, International Rectifier:
http://www.irf.com/product-info/datasheets/data/irf7207.pdf

IRF7326, International Rectifier, FETKY MOSFET/Schottky Diode:
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-303&file=38248.pdf&scan=

IRF7326D2, International Rectifier, FETKY MOSFET/Schottky Diode, 30V, 3A, SO-8:
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-303/38248.pdf
http://www.irf.com/product-info/datasheets/data/irf7326d2.pdf
http://www.irf.com/product-info/datasheets/data/irf7326d2pbf.pdf

IRFL014, International Rectifier, IRFL014, 60V, 2.7A, 0.2 ohms RDSon, N-Channel HEXFET:
http://www.vishay.com/docs/91191/sihfl014.pdf
http://www.futurlec.com/Datasheet/Transistor/IRFL014.pdf

IRFR024N, International Rectifier, HEXFET® Power MOSFET, 55V, 17A:
http://www.irf.com/product-info/datasheets/data/irfr024n.pdf

IRU1239SC, International Rectifier, regulator
http://www.deadharddrive.com/forums/viewtopic.php?p=118

L5973A, ST Microelectronics, 2A Step Down Switching Regulator:
http://www.st.com/stonline/products/literature/ds/9552/l5973ad.pdf
http://www.nuhorizons.com/developmenttools/ST/refdesigns1/datasheets/l5973a.pdf

LD1117, LDO regulator, 800mA, ST Microelectronics:
LD1117DT33C, marking LD33C, 800mA, ST Microelectronics, 3.3V regulator: 
LD1117DT25C, marking LD25C, 800mA, ST Microelectronics, 2.5V regulator:
http://www.datasheetcatalog.org/datasheet/stmicroelectronics/2572.pdf
http://www.st.com/stonline/books/pdf/docs/2572.pdf

LDR2533, marking DR2533, ST Microelectronics, dual LDO regulator, 3.3V & 2.5V, equivalent to FAN1537PA:
http://www.datasheetarchive.com/dl/Datasheets-46/DSA-20108.pdf

LMV321 / LMV358 / LMV324, Single / Dual / Quad General Purpose, Low Voltage, Rail-to-Rail Output, Op-Amp:
http://www.national.com/ds/LM/LMV321.pdf
http://www.fairchildsemi.com/ds/LM%2FLMV358.pdf
http://focus.ti.com/lit/ds/symlink/lmv324.pdf

LP38691SD-2.5, 2.5V, 500mA LDO CMOS Linear Regulator, National Semiconductor, marking L119B:
http://www.national.com/ds/LP/LP38691.pdf

LX1911, Microsemi Corporation, marking 2987, 1.5A, 1.1MHz PWM Step-Down Regulator:
http://www.microsemi.com/en/sites/default/files/datasheets/lx1911ds.pdf

LX8815, Linfinity / Microsemi, Dual Channel 1A Low Dropout Regulator:
http://www.datasheetcatalog.org/datasheet/microsemi/MSC1645.pdf

LX8815-33, 3.3V, Linfinity, Dual Channel 1A Low Dropout Regulator:
http://www.datasheetcatalog.org/datasheet/microsemi/MSC1645.pdf

LX8816-04CDF, Microsemi Corporation, Dual Channel 1A Low Dropout Regulator:
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-303/42391.pdf

LX8817-33, 3.3V, Dual Channel 2.5A Low Dropout Regulator:
http://www.datasheetcatalog.org/datasheet/microsemi/lx8817.pdf
http://www.digchip.com/data/300/300-3-069010-LX8817.pdf

MBRM130L, On Semiconductor, 30V, 1.0A Low VF Schottky Rectifier, marking BCG:
http://www.onsemi.com/pub/Collateral/MBRM130L-D.PDF

MBRS130L, Fairchild, 2A, 30V, Schottky Rectifier:
http://www.fairchildsemi.com/ds/MB%2FMBRS130L.pdf

MBRS2040LT3, marking BJKL, Schottky Power Rectifier, ON Semiconductor, 2A, 40V:
http://www.onsemi.com/pub/Collateral/MBRS2040LT3-D.PDF

MBRS320T3, 3A 20V Schottky Rectifier, On Semiconductor, marking B32:
http://www.onsemi.com/pub/Collateral/MBRS340T3-D.PDF

MBRS340T3, marking B34, Motorola, Schottky Barrier Rectifier, 3A, 40V:
http://www.onsemi.com/pub_link/Collateral/MBRS340T3-D.PDF
http://www.datasheetcatalog.org/datasheet2/2/046cqgj2o89ezi9d5l2ry52yzwpy.pdf

MC34074AD, On Semiconductor, Single Supply 3.0V - 44V, Quad Operational Amplifier:
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-301&file=4188.pdf&scan=

MSV358, Rail-to-Rail Output, Low Voltage, Low Supply Current,General Purpose Dual OP Amps:
http://www.mosanalog.com/spec/MSV358_v5.pdf
http://www.ic-on-line.cn/IOL/datasheet/msv358_4246234.pdf
http://pdf.dzsc.net.cn/MSV/MSV358.pdf

NC7SZ126M5X, TinyLogic UHS Buffer with Three-State Output, Fairchild, marking 7Z26B:
http://www.fairchildsemi.com/ds/NC/NC7SZ126.pdf

NDT014L, Fairchild, 60V 2.8A, N-Channel Logic Level Enhancement Mode FET:
http://www.fairchildsemi.com/ds/ND/NDT014L.pdf
http://eshop.engineering.uiowa.edu/NI/pdfs/01/32/DS013260.pdf

NTF6P02T3, marking F6P02, Power MOSFET, -6.0 Amps, -20 Volts, P-Channel SOT-223, On Semiconductor:
http://www.datasheetcatalog.org/datasheet/on_semiconductor/NTF6P02T3-D.PDF
http://www.onsemi.com/pub_link/Collateral/NTF6P02T3-D.PDF

NTMSD3P102R2, ON Semiconductor, marking E3P102, FETKY P–Channel Enhancement–Mode Power MOSFET & Schottky Diode, Dual SO–8, –3A, –20V, 0.085 ohms:
http://www.onsemi.com/pub/Collateral/NTMSD3P102R2-D.PDF
http://www.datasheetcatalog.org/datasheet/on_semiconductor/NTMSD3P102R2-D.PDF

NTMSD3P303R2, ON Semiconductor, marking E3P303, FETKY, P-Channel Enhancement-Mode
Power MOSFET and Schottky Diode, 30V, 3A:
http://www.onsemi.com/pub/Collateral/NTMSD3P303R2-D.PDF
http://www.datasheetcatalog.org/datasheet/on_semiconductor/NTMSD3P303R2-D.PDF

NX2155H, marking NX155H, Nexsem / Microsemi, PWM controller:
http://www.microsemi.com/en/sites/default/files/datasheets/NX2155HDS.pdf

NX7101IDM, Microsemi, 2A High Voltage Synchronous Buck Converter, 4.75V-18V, 340kHz:
http://www.microsemi.com/en/sites/default/files/datasheets/NX7101_DS.pdf

NZT560/NZT560A, Fairchild, 60V, 3A, hfe = 250, SOT-223, NPN Low Saturation Transistor:
http://www.fairchildsemi.com/ds/NZ/NZT560.pdf
http://www.datasheetcatalog.org/datasheet/fairchild/NZT560.pdf

PBSS4350Z, marking PB4350, Philips, 50V, 3A,low VCE(sat) NPN transistor:
http://www.nxp.com/documents/data_sheet/PBSS4350Z.pdf

PHC21025, Philips, Complementary N-channel / P-channel enhancement mode MOS transistors, 30V, 3.5A, -2.3A:
http://www.nxp.com/documents/data_sheet/PHC21025.pdf
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-301&file=11621.pdf&scan=

PHK04P02T, Philips/NXP, P-ch MOSFET, 16V, 4.66A, marking code K04P02T:
http://www.nxp.com/acrobat_download/datasheets/PHK04P02T_1.pdf

PHN210T, 30V, 3.4A, RDSon = 200 mohm, dual N-ch TrenchMOS intermediate level FET, Philips / NXP:
http://www.nxp.com/documents/data_sheet/PHN210T.pdf
http://www.datasheetcatalog.org/datasheet/philips/PHN210T_1.pdf

PMBT2222A, NXP, marking W1P (W = site code), SOT23, 40V, 600mA, NPN, switching transistor:
http://www.nxp.com/documents/data_sheet/PMBT2222_PMBT2222A.pdf

PZT2222AT1, ON Semiconductor, marking P1F, SOT-223, NPN SILICON TRANSISTOR, 40V, 600mA, 1.5W:
http://www.onsemi.com/pub_link/Collateral/PZT2222AT1-D.PDF

RDS035L03, N-channel MOSFET, 30V, 3.5A, Rohm:
http://www.ec66.com/market/sheet/RDS035L03.pdf

RT8250, Richtek, synchronous step-down DC/DC converter, 3A:
http://www1.futureelectronics.com/doc/RICHTEK/RT8250GSP.pdf
http://www.richtek.com/download_ds.jsp?s=409

RT8284, Richtek, 2A, 23V, 340kHz Synchronous Step-Down Converter:
http://www.richtek.com/download_ds.jsp?s=566

RT9164-33CG, 3.3V linear LDO regulator, Richtek:
http://www.cheertech.com.tw/RichTek%20CD/Data%20sheet/DS9164-15.pdf

SD101CWS, Schottky diode, 30V 200mW, marking S3:
http://www.diodes.com/datasheets/ds30078.pdf

Si1413EDH, SOT-363, BA marking code, Vishay, P-Channel MOSFET, -20V, -2A:
http://www.vishay.com/docs/71396/si1413ed.pdf
http://www.s-manuals.com/smd-files/pdf/s/si1413edh_v.pdf

Si4833DY, Siliconix, P-Channel 30-V (D-S) MOSFET with Schottky Diode, SO-8:
http://www.vishay.com/docs/70796/70796.pdf

SS13, 30V, 1A, Vishay General Semiconductor, S3 marking code, Schottky Barrier Rectifier:
http://www.mouser.com/catalog/specsheets/SS12.pdf

ST1L02PM, Very low quiescent bicmos voltage regulator, Fixed output voltage: 1.8V, 2.5V, 3.3V:
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-32/DSA-630896.pdf
http://www.st.com/stonline/products/literature/ds/11242.pdf

ST1S03, 1.5A, 1.5MHz adjustable, step-down switching regulator:
http://www.st.com/stonline/books/pdf/docs/10992.pdf

ST1S06A, Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or
adjustable, step-down switching regulator:
http://www.st.com/stonline/products/literature/ds/12236/st1s06a.pdf

ST3L01K7R, STMicroelectronics, IC REG TRIPLE 2.6/3.3/8V 7SPAK, marking 3L01:
http://www.st.com/stonline/books/pdf/docs/8618.pdf
http://catalog.digikey.com/scripts/partsearch.dll?Detail?name=497-4313-1-ND

ST755, ST Microelectronics, Adjustable Inverting Negative Output Current Mode PWM Regulators:
http://www.st.com/stonline/products/literature/ds/5546/st755c.pdf
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-31/DSA-608338.pdf
http://www.stmicroelectronics.fr/stonline/products/literature/ds/5546/st755c.pdf
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXssyts.pdf

STD1802T4, ST Microelectronics, marking D1802, Low voltage fast-switching NPN power transistor, 60V, 3A:
http://www.st.com/stonline/books/pdf/docs/13638.pdf

STJ009, 30V, 5A, P-channel Trench MOSFET, AUK Corp:
http://www.lintry.com.cn/spec/17/STJ009.pdf
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-2/DSA-24387.pdf

STN715, ST Microelectronics, marking N715, NPN transistor, 80V, 1.5A:
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXytwvs.pdf
http://sigma.octopart.com/76915/datasheet/STMicroelectronics-STF715.pdf

STPS140A, marking code S140, power Schottky rectifier, 40V, 1A, 0.5V Vf(max):
http://www.st.com/stonline/books/pdf/docs/4935.pdf

STPS1L40A, marking code GB4, Low drop power Schottky rectifier, 40V, 1A, 0.42V Vf(max):
http://www.st.com/stonline/products/literature/ds/5507.pdf

STS2DPFS20V, ST Microelectronics, P-channel, 20V, 0.14 Ohm, 2.5A, SO-8, 2.7V-drive, StripFET II Mosfet Plus Schottky Diode:
http://www.st.com/stonline/products/literature/od/8144/sts2dpfs20v.pdf

TLE4417, Infineon, compatible with IRU1239SC, regulator
TLE4418G, Infineon, Triple Voltage Regulator, 2.6V (1.2 A), 3.3V (1.2 A), 8.0V (0.2 A):
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-14&file=DSA-263927.pdf&scan=
http://www.digchip.com/data/216/216-12565-0-TLE_4418.pdf

TLV271, marking VBHC, Texas Instruments, single operational amplifier, Rail-To-Rail Output, 2.7 V to 16 V, SOT-23:
http://www.datasheetcatalog.org/datasheet2/c/0gz0a1xswj144yortfkilww7wa3y.pdf
http://focus.ti.com/lit/ds/symlink/tlv271.pdf
http://www.ti.com/lit/gpn/tlv271

TS272CD, dual operational amplifier, ST Microelectronics:
http://www.tuxgraphics.org/common/src2/article09031/tlc272-ts272cn.pdf

uA78M08C, 8V regulator, 500mA:
http://focus.ti.com/lit/ds/symlink/ua78m05.pdf

uPA2680T1E, NEC, MOSFET with Schottky barrier diode, marking A2680, 6-pin:
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-22/DSA-436380.pdf

US1237SC, Unisem, multiple output, linear regulator:
IRU1237SC, International Rectifier, 3 Integrated Fixed Output LDO Linear Regulator:
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-15&file=DSA-282511.pdf&scan=
http://www.irf.com/product-info/datasheets/data/iru1237sc.pdf

UTC1117V33, YOUWANG Electronics Co.Ltd, linear, 1A, LDO 3.3V regulator:
http://www.datasheetcatalog.org/datasheets2/98/98580_1.pdf
http://www.suncoming.com/pdf/UTC1117e.pdf

VC4005, +5V TO -5V DC Voltage Converter / Inverter:
http://shostatsky.narod.ru/rem_comp/pdf/vc4005.pdf

X0202BN, ST Microelectronics, marking X2B, Sensitive Gate SCR, 1.4A:
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-17&file=DSA-332583.pdf&scan=
http://www.mouser.com/catalog/specsheets/X02---N_Datasheet.pdf


Sundry:

Transistors, marking codes

D108, Fairchild, probably date code

B3
A3
CB OB

Page 22 of the following datasheet shows what may be two typical configurations for a shock sensor amplifier.
LTC6240/LTC6241/LTC6242, Linear Technology, Single/Dual/Quad 18MHz, Low Noise, Rail-to-Rail Output, CMOS Op Amps:
http://www.bdtic.com/DataSheet/Linear/LTC6240_LTC6241_LTC6242.pdf

Dual N-Channel Enhancement Mode Field Effect Transistor, 6-pin, HOZA (with dots under H & Z):
eg AO6800, Alpha & Omega Semiconductor: http://www.aosmd.com/pdfs/datasheet/AO6800.pdf

P-channel MOSFET, Sanyo, marking 5139, SO8 package, same pinout and specs (?) as PHK04P02T, dates from 2003

6-pin, power?, 5032 TI.71K DYJ7, 4&5 shorted

E3P1S, FETKY, mosfet/diode???, ON Semiconductor, 8-pin, marking code similar to NTMSD3P102R2, Internet references to NTMSD3P1SR2
See RHS of http://www.softcom.com.my/Seagate/ST3500320AS.jpg - pins 5,6,7,8 connected to 1R2 coil - pins 1&2 connected to capacitor
E6N3S, 8-pin, ON Semiconductor, 2703 date code, 1&2 shorted, 5&6 shorted, power IC?, pin 8 to 3R3 coil, SOP8, FETKY?

E6N3S, 2625 (2YWW date code), MOSFET chopper plus Schottky flywheel diode?, pins 7,8 to 3R3 coil, other side of coil to R200 (0.2 ohm) plus filter cap, pin 4 to SMOOTH, marking code similar to NTMSD3P102R2, could it be NTMSD36N3SR2 ???

Fairchild, P52AB (not lead-free, date code), 1540 (p/n ?), 6-pin
Fairchild, V33DP (date code 2003, 45th week of March ?, other ICs 323/317/325), 1540 (p/n ?), 6-pin, could it be FAN1540 3.3V 1.3A LDO regulator, pins 5&6 to GND, 3 input (?), 2 output (?), 4 enable or sense(?) http://www.iiic.hk.cn/RoHS/Fairchild_Rohs.pdf (ROHS coding, not datasheet)
http://www.datasheetcatalog.org/datasheet2/5/0q9otkl6wdj6ely3j9u1a6qqzo3y.pdf

marking 1914, Microsemi Corporation:
LX1914, High Frequency PWM Step Down Regulator ??? ... is it similar to LX1912 (marking 1912) ???? http://www.microsemi.com/en/sites/default/files/datasheets/LX1912.pdf