参数资料
| 型号： | SP6644EU-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 12/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC 3.3V/ADJ 8MSOP |
| 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： | 0.9 V ~ 3.3 V |
| 电流 - 输出： | 175mA |
| 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-MSOP |
noisy traces, such as from the LX pin, should be
kept away from the voltage-feedback network
and separated from it using grounded copper to
minimize EMI.
Capacitor equivalent series resistance is a major
contributor to output ripple, usually greater than
60%. Low ESR capacitors are recommended.
Ceramic capacitors have the lowest ESR.
Low-ESR tantalum capacitors may be a more
acceptable solution having both a low ESR and
lower cost than ceramic capacitors. Designers
should select input and output capacitors with a
rating exceeding the peak inductor current. Do
not allow tantalum capacitors to exceed their
ripple-current ratings. A 22 μ F, 6V, low-ESR,
surface-mount tantalum output filter capacitor
typically provides 60mV output ripple when
stepping up from 1.3V to 3.3V at 20mA.
An input filter capacitor can reduce peak
Designers should add LC pi filters, linear
post-regulators, or shielding in applications
necessary to address excessive noise, voltage
ripple, or EMI concerns. The LC pi filter's cutoff
frequency should be at least a decade or two
below the DC-DC converters's switching
frequency for the specified load and input voltage.
A small SOT23-5pin 200mA Low Drop Out
linear regulator can be used at the SP6644/6645
output to reduce output noise and ripple. The
schematic in figure 29 illustrates this circuit with
the SP6644 3.3V output followed by the Sipex
SP6201 3.0V output Low Drop Out linear regu-
lator. Compare in Figure 21 the SP6644 ripple of
40-50mVpp with the SP6201 ripple of about
3mVpp and you can see the amount of noise
reduction obtained. Additional performance
characteristics for the SP6644/6201 combina-
tion can be seen in figures 17 to 20.
currents drawn from the battery and improve
efficiency. Low-ESR aluminum electrolytic
capacitors are acceptable in some applications
but standard aluminum electrolytic capacitors
are not recommended.
Inductor Specification
Inductance
Manufacturer/Part No.
Resistance
Isat
(uH)
Sumida CD43-220
(ohms)
0.38 (max)
(mA)
680
22
47
100
Sumida CDRH5D18-220
Coilcraft DO1608C-223
Sumida CD43-470
Coilcraft DO1608C-473
Sumida CD54-101
Coilcraft DO1608C-104
0.28 (max)
0.32 (typ)
0.84 (max)
0.56 (typ)
0.7 (max)
1.1(typ)
760
700
440
500
520
310
Table 1. Surface-Mount Inductor Information
Date: 11/30/04
SP6644/6645 High Efficiency Boost Regulator
12
? Copyright 2004 Sipex Corporation
相关PDF资料 |
PDF描述 |
|---|---|
| SP6648EU-L/TR | IC REG BOOST SYNC 0.4A 10MSOP |
| SP6650EU-L | IC REG BUCK SYNC 3.3V/ADJ 10MSOP |
| SP6651AEU-L | IC REG BUCK SYNC ADJ 0.8A 10MSOP |
| SP6652EU-L | IC REG BUCK SYNC ADJ 1A 10MSOP |
| SP6654EU-L | IC REG BUCK SYNC ADJ 0.8A 10MSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6644TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Single/Dual Alkaline Cell, High Efficiency Boost DC-DC Regulator |
| SP6644UEB | 功能描述:电源管理IC开发工具 Hi-Efficiency Boost DC/DC Regulator 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 |
| SP6645 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6645EU | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Single/Dual Alkaline Cell, High Efficiency Step-Up DC-DC Converter |
| SP6645EU-L | 功能描述:开关变换器、稳压器与控制器 Sngl/Dual Alkaline Cell High Eff DC-DC RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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