R1272S Series AEC-Q100Compliant 34 V Input Synchronous Step-down DC /DC Controller for Automotive Applications
R1272s是一种降压型DC/DC控制器,通过驱动外部高/低压侧NMOS,可产生0.7 V至5.3 V的输出电压。采用独特的无外接电流感测电阻的电流模式脉宽调制(PWM)结构,即使在外接低场效应晶体管(RON)和低直流电阻(DCR)电感,R1272S也能构成一个稳定、高效率的DC/DC变换器。利用外相位补偿电容器对频率特性进行优化,使R1272s能够对输入电压和负载电流的变化做出高速响应。用户可设置的振荡频率可通过外部电阻在250 kHz至1 MHz(1)的范围内调节,也可与外部时钟同步。
输出电压控制方法有三种工作模式:强制PWM模式、PLL U PWM模式和PWM/VFM自动切换模式。这些模式可根据模式引脚的条件进行选择。
特别是在轻载条件下,PWM/VFM自动切换模式可以提高效率。
R1272s可以通过降低工作频率(可能的最低限值是频率的四分之一)来减小起动时输入电压降导致的输出电压降,从而降低了关闭占空比。
保护功能包括电流限制功能、欠压锁定功能、过电压保护功能、软启动功能、低电感电流关闭功能等。此外,电源良好功能使用电源良好(pgood)插脚提供输出状态。
为了减少电磁干扰,在脉宽调制(PWM)操作时,可选择使用散射振荡频率的SSCG(扩频时钟发生器)。R1272s在HSOP-18封装中提供。
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SERIES,R5404K,RP114X,R1111N,RP200Z,R1244N,R3150,RP201Q,R2061,R3121NXXXA,R3121NXXXG,R3154,RP201N,R3115Z,R3114X,R3121NXXXE,R3152,R2062,RP201K,R2221L,R1514X-Y,RS5C338A,R2221T,R5403K,R5106,R5107,R5108,R5109,R1110N,R3121NXXXA-Y,R3160,RP200Q,R3200L064A,R5101,R5535V,R1242S,RP200N,RP200K,RP115L,R1277L-Y,R2023X,R5511D,R5511H,R1155,R5426N,R5114SXX2X,R2000,R1154,R1286K,R5511N,R5534V,R3112X,R5449Z,R2025D,R1150,RP510L,R5110LXX2C,R5110LXX2D,R5426D,R2025S,R5528,R1205X8XXB,R5510H,R1205X8XXC,R5524,R1152N,R5401K,R1513S-Y,R5425N,R5114SXX1X,R5527,R1285L,R5520,R5401N,R5523,R1260S,R5533V,R5448Z,R1163,R1160,R1151N,R1161,RP506L-Y,R1561X-Y,R3119,R5400D,R1131N,R3114,R2025,R3112,R3111,R5538,R2023,R3118,R3117,R3116,R5533,R1170,RP122ZXX3,R1173,R5532V,RN5RYXX1,R2262,R1171,R1172,R5315B,R2023L,R3113D,R5314D,R1130D,R2023T,RN5T618,R2033,3150NXXXA,R5542,3150NXXXB,R5641L,R5543,RP202X,R1130H,R1180,R5540,R5541,R3121,RP118X,R5446Z,R5531V,TK111,TK112,R3111X,TK113,R5106N-Y,R1275S-Y,RP512X,RP600,RN5U700,R5116L-Y,RP601,R1200X,RP602,RP604,RN5T614,RP605,R1204KXXXD,R5550KXXXA,R3152NXXXB-Y,R1801,R1800,LP2985,RP511X,R1213K001A,LP2980,R1213K001B,RP402X,R1201N,R1225N,R1201L,R1200Z,R1115Z,R1114X,RN5VD,R3500SXXXA-Y,R1810,R1204K,R1204NXXXA,R3200X002X,R1204NXXXD,RP401X,R3112QXX2,R1202X,RM590,R1203L,NJU77550,R1118N,R1118K,R3200X001X,R1204KXXXA,R5471 SERIES,R2051S01,NJU77552,R1203N,RP400X,R1116X,R5115SXX1X,RC5T619X,RN5U70,R5117,R5114,R5115,R5116,RP602X,R5115SXX2X,R5110,R5111,R5112,R3154 SERIES,R5590,RP517X,R5111SXX1B-Y,R5409K,R5524X001-Y,R3116X-Y,R1221N,RV5C348B,RX5RZ,RV5C348A,R1112N,RX5RW,RP601Z,R1243X,RP516X,RX5RL,R5540K004,R2223X,R5112S-Y,R5540K002,R5408K,R5408L,R5602L,RN5RG,RN5RF,R1200N,R1224N,R1200L,R1200K,RP515X,R5601T,R3118X,RN5RK,R5117 SERIES,R3160 SERIES,R5408D,RN5RT,R3121NXXXG-Y,R5407K,R5407N,R5601L,R1223N,R540XX,R1524X-Y,RP539Z,R1113Z,R1245X,RP514X,R1273L-Y,R5486K,R5462K,RP510L-Y,RP103QXX2,R5220K,R5220D,RS5C372A,RP200,R5460X,RS5C372B,RP201,RP202,P600K,R2061L,R1500H,R2061S,R1500J,R5461K,RP605X,R3117X-Y,R130X-Y,R5111LXX2D-Y,R3160NXXXB-Y,R5115 SERIES,RP604X,R1501X,RP123XXX1,R3150NXXXE-Y,R1150HXXXC,R1150HXXXD,R1150HXXXA,R1150HXXXB,R1526S,R1206N071B,R1525X,R1278S-Y,RP519Z,R1524X,R5111SXX2D-Y,R5590X,R1218N,R1218K,RP402,R5590N,RP400,RP401,R5524X002B,R5524X002A,R3152NXXXA,R1276S-Y,R3152NXXXB,R5590D,R5111XXX2D-Y,R5480K,R5528Z001A,RX5C338A,R1304L-Y,R1282D,R2262T,R1232,R5640G,RN5C752,R3134K,R2043X,R3134N,R5441 SERIES,R3133Q,R2045D,R5107G-Y,R5445Z,R1526S-Y,R3132X,R1810X,RP120Z,R2045S,R3111E,R1243,R5601,R1244,R5602,R1242,R5312L,R1245,R5421N,R2262X,R1560 SERIES,R1171S,R3134Q,R1240,R1170X,R5524X001A,R5524X001B,RP122NXX1,R5617,R1517X-Y,R5612,R5115X,R5613,R5614,R5615,R5610,R5116S,R5611,R5117S,R3131N,R5117L,R5116S-Y,R5442X,R2043L,R5443Z,RN5RYXX202,R1283Z,R1173X,R3150NXXXA-Y,R2043T,RP171N-Y,R3133D,R5114X,R3201,R1283K,R3200,R1150H,R5310L,R5116L,R1260,R2262L,R1172X,R1203N071B,R1540X-Y,RP124X,R5466K,R3154N,RN5C713,RP100X,RN5C711,RN5C716,R3152 SERIES,R1191X,R5441Z,R1207,R1208,R1580N-Y,R1205,R1206,R1200,R1203,R1204,RP123X,R5550K,R1202,NJU77806,R3130N,R1190X,R1218,R2062L,R1171J,R1210,R2061X,R1211,RP122XXX1,R5112S,R5464K,R1214,R1215,RP122X,R1280D,R1212,R1213,R5109G-Y,R1700V,RS5C372X,R5487L,R1225,R5463K,R1223,R1224,RP123NXX1,R1207N8X3C,R1230D,R1207N8X3B,R5527K,R1278S,R5436,R5612L,R5437,RP104X,R5438,RIOT-001,R1121N,R5439,R5432,R5433,R5434,R5435,R1580N,RP106N,R3201L003,R3201L002,NJU7076,NJU7077,R3201L004,R5611L,R1120N,RP103X,R5448,R3201L001,R5449,RP111X-Y,R5443,R5445,R5446,RN5T566,RN5T567,R1272S-Y,R5441,RP105Q,R5442,R5524X,R2000 SERIES,R1276S,RN5T568,RP170X-Y,R1232D,RP102X,R5458,R5459,R5610L,RP600K2XXC,RP104Q,R3200L053B,RP901,RP904,R3L60N,R5439K,R5524K,R3150NXXXE,R3150NXXXF,R1122N,R5524N,R3200L052B,R5466,RP101X,R5461,R5220,R5462,R5463,R5464,R3150NXXXA,R3150NXXXB,R5460,R5438L,R1276,R1277,R5523N,R1275,RP520X,R1278,RP600K0XXA,RP600K0XXB,R1272,R1273,R1140Q,R5522V,R1270,RP109X,R1271,R1163X,R5328K,R1560X-Y,R5437L,RS5C348A,R1287,R1273L,R1286,R5641,R5436T,R1280,R1272S,R5640,R5115LXX2X,R1283,R5521V,R5435X,R1282,R1271X,RP550L-Y,RP108J,R1260S-Y,R2033X,3121NXXXA,RP300X,R1290,R5650,R5651,R1294,RP107X,R1275S,R1525 SERIES,R5326Z,R1293,R5109G,R5H5SXX2X-Y,R540X,R5326K,R5459L,R5520H,R5326N,RP105X,RS5C313,RP106X,R1141Q,3121NXXXG,R5114SXX2X-Y,R5108G,R1561 SERIES,RP107N,R1250V,R5112SXXXD,RC5T619,RP500X,R5115LXX2X-Y,R5112SXXXB,RP502L,R1213K,RP500Z,R1211X,RP501K,NJU7026,NJU7027,R3500S,R3500SXXXA,R5617Z,RP501,R5116 SERIES,RP503,RP504,RP505,RP506,RP507,RP508,RP500L,RP500K,RP500N,RP500,R1700,R5617L,R1214Z,R1215D,R1202LXXXD,R1540X,NJU7046,NJU77240,NJU7047,NJU77000,NJU77242,R,PORTABLE COMMUNICATION EQUIPMENT,音频播放器,PNDS,交流适配器,清洁剂,PC CARD READER WRITER,USB充电器,CCDS,DESK LAMP,电子仪表,DSVCS,DIGITAL TVS,便携式通信设备,头盔显示器,OLED,EXPRESS CARD SLOT,电荷耦合器件,PC PERIPHERALS,数码摄像机,IOT APPLICATION,DIGITAL CAMERA,打印机,PC外设,风扇,EXPRESS卡插槽,PC卡读写器,微型投影機,PICO PROJECTOR,USB硬盘,STBS,POS,AC ADAPTERS,PC CARD BUS SLOT,多功能处理器,升压电源,机顶盒,USB CHARGERS,二次电池供电设备,AUDIO PLAYER,INDUSTRIAL,LCDS,无线充,USB HDD,个人计算机,SMART SPEAKER,OLEDS,NOTEBOOK PCS,SMARTPHONES,智能 音箱,OA,智能手机,MFPS,液晶显示器,数字电视,SMART PROJECTOR,ELECTRONIC INSTRUMENT,HMD,STEP-UP POWER SUPPLY,工业,CLEANER,ENERGY HARVESTING APPLICATION,PCS,TABLET PCS,WIRELESS CHARGER,SECONDARY BATTERY-POWERED EQUIPMENT,平板电脑,PRINTERS,FAN,台灯,笔记本电脑,PC卡总线插槽,智能投影仪,DSCS
【方案】基站授时系统优选元器件方案
优选器件方案 本方案针对上述需求采用了Silicon Labs 8位主控MCU EFM8UB20、杭州中科微的BDS/GNSS全星座定位授时模块ATGM332D-5T31,Intersil的20Mbps 速率全双工带ESD保护功能的RS485 芯片ISL3177E以及一款40Mbps RS485全双工带ESD保护功能芯片
RICOH,RENESAS,EPSON,兆易创新,SILICON LABS,中科微 - DC-DC,直流-直流,晶体,LDO,NOR FLASH,闪存,NOR闪存,MCU,授时模块,单片机,R1270S,EFM8UB20,RP115L331D-TR-Y,EFM8UB20F64,ISL3177E,Q3321CE30006800,C8051F340,GD25Q80CTIGR,ATGM332D-5T31,RS485,ISL3180E,RP1517X,基站,基站授时系统
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