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参数资料
| 型号： | MAX1678EUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC 3.3V/ADJ 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 3.3V，2 V ~ 5.5 V |
| 输入电压： | 0.7 V ~ 5.5 V |
| 电流 - 输出： | 90mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-uMAX |
1-Cell to 2-Cell, Low-Noise,
High-Efficiency, Step-Up DC-DC Converter
BATT
BACKUP t OFF
TIMER
ZERO-CROSSING
DETECTION
OUT
0.5REF
DAMPING
SWITCH
t ON = K/V BATT
DAMP
TON
TOFF
PDRV
P
EN
CONTROL LOGIC
NDRV
PFI
LX
PFO
RFRDY
REF
MAX1678
REF
START-UP
OSCILLATOR
N
FB
1.23V REF
0.5REF
GND
OUT
1.7V
SHDN
START-UP COMPARATOR
Figure 1. Functional Diagram
Detailed Description
The MAX1678 consists of an internal 1 ? , N-channel
MOSFET power switch, a built-in synchronous rectifier
that acts as the catch diode, a reference, PFM control
circuitry, and an inductor damping switch (Figure 1).
The device is optimized for applications that are pow-
ered by 1 to 3-cell alkaline, NiMH, or NiCd batteries, or
a 1-cell lithium battery such as pagers, remote controls,
and battery-powered instruments. They are designed to
meet the specific demands of the operating states
characteristic of such systems:
1) Primary battery is good and load is active: In this
state the load draws tens of milliamperes and the
MAX1678 typically offers 80% to 90% efficiency.
2) Primary battery is good and load is sleeping: In this
state the load draws hundreds of microamperes and
the DC-DC converter IC draws very low quiescent
current. Many applications maintain the load in this
state most of the time.
3) Primary battery is dead and DC-DC converter is
shut down: In this state the load is sleeping or sup-
plied by the backup battery, and the MAX1678
draws 0.1μA current from the OUT pin.
4) Primary and backup battery dead: The DC-DC con-
verter can restart from this condition.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1678EVKIT | 功能描述:电源管理IC开发工具 Evaluation Kit for the MAX1678 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX1679EUA | 功能描述:电池管理 Battery Charger Current-Limited Sply RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1679EUA+ | 功能描述:电池管理 Battery Charger Current-Limited Sply RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1679EUA+T | 功能描述:电池管理 Battery Charger Current-Limited Sply RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1679EUA-T | 功能描述:电池管理 Battery Charger Current-Limited Sply RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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