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MAX668-MAX669中文资料PDF规格书
MAX668-MAX669规格书详情
General Description
The MAX668/MAX669 constant-frequency, pulse-width modulating (PWM), current-mode DC-DC controllers are designed for a wide range of DC-DC conversion applications including step-up, SEPIC, flyback, and isolated output configurations. Power levels of 20W or more can be controlled with conversion efficiencies of over 90. The 1.8V to 28V input voltage range supports a wide range of battery and AC-powered inputs. An advanced BiCMOS design features low operating current (220µA), adjustable operating frequency (100kHz to 500kHz), soft-start, and a SYNC input allowing the MAX668/MAX669 oscillator to be locked to an external clock.
DC-DC conversion efficiency is optimized with a low 100mV current-sense voltage as well as with Maxim’s proprietary Idle Mode™ control scheme. The controller operates in PWM mode at medium and heavy loads for lowest noise and optimum efficiency, then pulses only as needed (with reduced inductor current) to reduce operating current and maximize efficiency under light loads. A logic-level shutdown input is also included, reducing supply current to 3.5µA.
Features
♦ 1.8V Minimum Start-Up Voltage (MAX669)
♦ Wide Input Voltage Range (1.8V to 28V)
♦ Tiny 10-Pin µMAX Package
♦ Current-Mode PWM and Idle Mode™ Operation
♦ Efficiency over 90
♦ Adjustable 100kHz to 500kHz Oscillator or SYNC Input
♦ 220µA Quiescent Current
♦ Logic-Level Shutdown
♦ Soft-Start
Applications
Cellular Telephones
Telecom Hardware
LANs and Network Systems
POS Systems
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
MAXIM |
2020+ |
原厂封装 |
35000 |
100%进口原装正品公司现货库存 |
询价 | ||
MAXIM |
22+ |
QSOP16 |
7500 |
品牌一级代理,新加坡香港上百万现货,欢迎查询! |
询价 | ||
MAXIM |
23+ |
SSOP |
4500 |
全新原装、诚信经营、公司现货销售! |
询价 | ||
MAXIM |
23+ |
BGAQFP |
8659 |
原装公司现货!原装正品价格优势. |
询价 | ||
MAXIM |
2015+ |
SOP/DIP |
19889 |
一级代理原装现货,特价热卖! |
询价 | ||
MAXIM |
23+ |
SSOP |
6500 |
绝对全新原装!现货!特价!请放心订购! |
询价 | ||
MAXIM |
2016+ |
SSOP16 |
6528 |
只做原厂原装现货!终端客户个别型号可以免费送样品! |
询价 | ||
MAXIM/美信 |
2403+ |
TSSOP |
11809 |
原装现货!欢迎随时咨询! |
询价 | ||
MAXIM |
19+ |
QSOP |
256800 |
原厂代理渠道,每一颗芯片都可追溯原厂; |
询价 | ||
美信MAX |
22+ |
SOP16 |
8200 |
原装现货库存.价格优势!! |
询价 |