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| 型号： | MAX15003ATM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/31页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 48TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 3 |
| 频率 - 最大： | 2.2MHz |
| 电源电压： | 5.5 V ~ 23 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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MAX15003
Triple-Output Buck Controller with
Tracking/Sequencing
The Type II compensator ’s mid-frequency gain
(approximately 18dB shown here) is designed to com-
pensate for the power modulator’s attenuation at the
desired crossover frequency, f CO (G E/A + G MOD = 0dB
at f CO ). In this example, the power modulator’s inherent
-20dB/decade roll-off above the ESR zero (f ZERO, ESR )
is leveraged to extend the active regulation gain-band-
width of the voltage regulator. As shown in Figure 5b,
the net result is a 6x increase in the regulator’s gain
bandwidth while providing greater than 75° of phase
margin (the difference 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 an inductor with minimal parasitics,
the inherent ESR zero may occur at a much higher fre-
quency, as shown in Figure 5c.
As with the previous example, the actual gain and
phase response is overlaid on the power modulator’s
asymptotic gain response. One readily observes the
more dramatic gain and phase transition at or near the
power modulator’s resonant frequency, f LC , versus the
gentler response of the previous example. This is due
to the component’s lower parasitics leading to the high-
er frequency of the inherent ESR zero of the output
POWER MODULATOR (HIGH-QUALITY OUTPUT
CAPACITORS (S)) GAIN (REAL, ASYMPTOTIC)/
PHASE RESPONSE vs. FREQUENCY
capacitor. In this example, the desired crossover fre-
quency occurs below the ESR zero frequency.
In this example, a compensator with an inherent mid-
frequency double-zero response is required to mitigate
the effects of the filter’s double-pole. Such is available
with the Type III topology.
As demonstrated in Figure 5d, the Type III ’s mid-
frequency double-zero gain (exhibiting a +20dB/
decade slope, noting the compensator’s pole at the ori-
gin) is designed to compensate for the power modula-
tor ’s double-pole -40dB/decade attenuation at the
desired crossover frequency, f CO (again, G E/A + G MOD
= 0dB at f CO ). (See Figure 5d).
In the above example, the power modulator’s inherent
(mid-frequency) -40dB/decade roll-off is mitigated by
the mid-frequency double zero’s +20dB/decade gain to
extend the active regulation gain-bandwidth of the volt-
age regulator. As shown in Figure 5d, the net result is
an approximate doubling in the regulator’s gain band-
width while providing greater than 60° of phase margin
(the difference between G E/A and G MOD respective
phases at crossover, f CO ).
Design procedures for both Type II and Type III com-
pensators are shown below.
POWER MODULATOR (HIGH-QUALITY OUTPUT CAPACITOR(S))
AND TYPE III COMPENSATOR GAIN (ASYMPTOTIC)/
PHASE RESPONSE vs. FREQUENCY
40
MAX15003 fig05c
90
80
MAX15003 fig05d
270
20
|G MOD |
|G MOD |
f LC
45
60
40
|G EA |
< G EA
f LC
203
135
0
0
20
68
-20
-45
0
f ZEROES
0
-40
|G MOD |
f ZEROES
-90
-20
-40
| G MOD |
< G MOD
-68
-135
-60
f ZEROES
-135
-60
f CO
f ZEROES
-203
-80
-180
-80
-270
10
100
1k
10k
100k
1M
10M
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 5c. Power Modulator Gain and Phase Response (High-
Quality COUT)
22
FREQUENCY (Hz)
Figure 5d. Power Modulator (High-Quality COUT) and Type III
Compensator Responses
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15003EVKIT+ | 功能描述:电源管理IC开发工具 MAX15003 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 |
| MAX15004AAUE/V+ | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX15004AAUE/V+T | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX15004AAUE+ | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX15004AAUE+T | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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