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参数资料
| 型号： | MAX15049ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 23/31页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM STP-DN TRIPL 32WQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 应用： | 电源控制器，序列发生器 |
| 电源电压： | 4.7 V ~ 23 V |
| 电流 - 电源： | 6mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 管件 |
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MAX15048/MAX15049
Triple-Output Buck Controllers
with Tracking/Sequencing
The desired (compensated) rolloff follows a -20dB/
decade slope (and commensurate 90° of phase shift),
and, in this example, occurs at approximately six times
the uncompensated crossover frequency, f CO . In this
example, a Type II compensator provides stable closed-
loop operation, leveraging the +20dB/decade slope of
the capacitor’s ESR zero (see Figure 4b).
The Type II compensator’s midfrequency gain (approxi-
mately 18dB shown here) is designed to compensate for
the power modulator’s attenuation at the desired cross-
over frequency, f CO (G E/A + G MOD = 0dB at f CO ). In this
example, the power modulator’s inherent -20dB/decade
80
rolloff above the ESR zero (f ZERO, ESR ) is leveraged to
extend the active regulation gain bandwidth of the volt-
age regulator. As shown in Figure 4b, the net result is a
six-time increase in the regulator’s gain bandwidth while
providing greater than 75° of phase margin (the differ-
ence between G E/A and G MOD respective phases at
crossover, f CO ).
Other filter schemes pose their own problems. For
instance, when choosing high-quality filter capacitor(s)
(e.g., MLCCs) and inductor, with minimal parasitics, the
inherent ESR zero can occur at a much higher frequency,
as shown in Figure 4c.
180
60
< G E/A
135
40
20
|G E/A |
f LC
f J
90
45
f ZERO, ESR
0
0
-20
-40
< G MOD
|G MOD |
-45
-90
f ZERO, ESL
-60
-80
FREQUENCY (Hz)
Figure 4b. Power Modulator (Large, Bulk C OUT ) and Type II Compensator Responses
40
|G MOD |
-135
-180
90
20
0
-20
-40
-60
-80
|G MOD | ASYMPTOTE
< G MOD
f LC
f ZERO, ESR
f ZERO, ESL
45
0
-45
-90
-135
-180
FREQUENCY (Hz)
Figure 4c. Power Modulator Gain and Phase Response (High-Quality C OUT )
Maxim Integrated
23
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15049ETJ+ | 功能描述:DC/DC 开关控制器 1.2MHz Triple Buck w/Tracking 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 |
| MAX15049ETJ+ | 制造商:Maxim Integrated Products 功能描述:IC BUCK CNTRL TRIPLE 32WQFN 制造商:Maxim Integrated Products 功能描述:IC, BUCK, CNTRL, TRIPLE, 32WQFN |
| MAX15049ETJ+ | 制造商:Maxim Integrated Products 功能描述:IC PWM STEP-DOWN DC/DC CONVER |
| MAX15049ETJ+T | 功能描述:DC/DC 开关控制器 1.2MHz Triple Buck w/Tracking 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 |
| MAX15049EVKIT+ | 功能描述:电源管理IC开发工具 MAX15049 Eval Kit 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 |
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