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参数资料
| 型号： | SP6652ER-L |
| 厂商： | Exar Corporation |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1A 10DFN |
| 标准包装： | 100 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.9 V ~ 5 V |
| 输入电压： | 2.85 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 1A |
| 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： | 10-VFDFN 裸露焊盘 |
| 包装： | 散装 |
| 供应商设备封装： | 10-DFN（3x3） |
| 其它名称： | 1016-1216 |
APPLICATIONS INFORMATION
over frequency f zero = 80kHz (from the
Bode plot) divided by the loop gain band -
width, given as 20kHz, which is used in the
following equation:
Error Amp Gain
= f zero / (loop gain bandwidth)
= 80kHz / 20kHz
=4
The error amp transconductance is about
1mS, so this sets the R Z resistor to be:
Rz = 4/1mS = 4KΩ
We will use R Z = 4KΩ for the 3.3V output
compensation.
The zero for loop compensation is placed
at the first modulator pole of 4 kHz to pro -
vide a loop response of -20/dB/decade at
the crossover frequency. The compensa -
tion capacitor Cc can be calculated from
the crossover frequency pole1 and the R Z
value:
C C = 1/(2π? R Z ?pole1) = 1/(2π? 4K ?4kHz)
= 10nF
From the Typical Performance Charac -
teristics load step curves, the 2.5V output
and 3.3V output are stable with R Z = 4KΩ
and C C = 10nF. For 1.8V to 0.85V output,
the values R Z = 2KΩ and C C = 10nF are
recommended.
Figure 4. Typical SP6652 circuit layout.
Oct10-07 RevJ
SP6652 1A, High Efficiency, Current Mode PWM Buck Regulator
0
? 2007 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6652ER-L/TR | 功能描述:开关变换器、稳压器与控制器 High Eff Synchronous Step-Down Converter 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 |
| SP6652EU | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6652EU/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A, High Efficiency, High Frequency Current Mode PWM Buck Regulator |
| SP6652EU-ES | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A, High Efficiency, Fixed 1.4 MHz Current Mode PWM Buck Regulator |
| SP6652EU-L | 功能描述:开关变换器、稳压器与控制器 High Eff Synchronous Step-Down Converter 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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