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参数资料
| 型号： | MAX15041ETE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 16TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 25.2 V |
| 输入电压： | 4.5 V ~ 28 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 350kHz |
| 电流 - 输出： | 3A |
| 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： | 16-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TQFN-EP（3x3） |
Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
1ST ASYMPTOTE
GAIN
V FB x V OUT -1 x 10 A VEA [dB]/20 x G MOD x R LOAD
2ND ASYMPTOTE
V FB x V OUT -1 x g MV x (C C ) -1 x G MOD x R LOAD
3RD ASYMPTOTE
V FB x V OUT -1 x g MV x (C C ) -1 x G MOD x R LOAD x ( C OUT (ESR + R LOAD )) -1
4TH ASYMPTOTE
V FB x V OUT -1 x g MV x R C x G MOD x R LOAD x (C OUT (ESR + R LOAD )) -1
3RD POLE
(C CC R C ) -1
2ND ZERO
(C OUT ESR) -1
UNITY
1ST POLE
g MV x (10 A VEA [dB]/20 C C ) -1
1ST ZERO
(C C R C ) -1
CO
RAD/S
2ND POLE
(C OUT (ESR + R LOAD )) -1
5TH ASYMPTOTE
V FB x V OUT -1 x g MV x R C x G MOD x (ESR || R LOAD )
6TH ASYMPTOTE
V FB x V OUT -1 x g MV x ( C CC ) -1 x G MOD x (ESR || R LOAD )
Figure 2. Asymptotic Loop Response of Peak Current-Mode Regulator
If C OUT is large, or exhibits a lossy equivalent series
resistance (large ESR), the circuit’s second zero may
come into play around the crossover frequency (f CO =
ω CO /2 π ). In this case, a third pole may be induced by a
second (optional) small compensation capacitor (C CC ),
connected from COMP to SGND.
The loop response’s fourth asymptote (in bold, Figure
2) is the one of interest in establishing the desired
crossover frequency (and determining the compensa-
tion component values). A lower crossover frequency
provides for stable closed-loop operation at the
the desired closed-loop frequency response and phase
margin as outlined in the Closing the Loop: Designing
the Compensation Circuitry section.
Closing the Loop: Designing the
Compensation Circuitry
1) Select the desired crossover frequency. Choose f CO
equal to 1/10 th of f SW , or f CO ≈ 35kHz.
2) Select R C using the transfer-loop’s fourth asymptote
gain (assuming f CO > f P1 , f P2 , and f Z1 and setting
the overall loop gain to unity) as follows:
expense of a slower load and line transient response.
Increasing the crossover frequency improves the tran-
sient response at the (potential) cost of system instabili-
1 =
V FB
V OUT
× g MV × R C × G MOD × R LOAD
ty. A standard rule of thumb sets the crossover
frequency ≤ 1/10 of the switching frequency (for the
MAX15041, this is approximately 35kHz for the 350kHz
fixed switching frequency).
therefore:
×
1
2 π × f CO × C OUT × ( ES R + R LOAD )
R C = ×
First, select the passive and active power components
that meet the application’s requirements. Then, choose
the small-signal compensation components to achieve
V OUT
V FB
2 π × f CO × C OUT × ( ESR + R LOAD )
g MV × G MOD × R LOAD
14
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相关代理商/技术参数 |
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|---|---|
| MAX15041EVKIT+ | 功能描述:电源管理IC开发工具 3A 350kHz Step-Down w/Internal Switch 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 |
| MAX15046AAEE+ | 功能描述:DC/DC 开关控制器 40V Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX15046AAEE+T | 功能描述:DC/DC 开关控制器 40V Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX15046AEEE+ | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX15046AEEE+T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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