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参数资料
| 型号： | MAX15112EVKIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/23页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT STEP-DOWN 12A MAX15112 |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 功率 - 输出： | 18W |
| 输出电压： | 1.5V |
| 电流 - 输出： | 12A |
| 输入电压： | 2.7 V ~ 5.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX15112 |
MAX15112
High-Efficiency, 12A, Current-Mode Synchronous
Step-Down Regulator with Integrated Switches
G MOD MC ×
= g
1 + × ? ? K S × (1- D) - 0.5 ? ?
G FF (s) =
R2 sC FF R1 + 1
G EA (s) = 10 AVEA(dB)/20 ×
? 10 AVEA(dB)/20 ?
sC C ? ? + 1
g M
?
?
The peak current-mode controller’s modulator gain is
attenuated by the equivalent divider ratio of the load
resistance and the current-loop gain. G MOD becomes:
1
R LOAD
f SW x L
where R LOAD = V OUT /I OUT(MAX) , f SW is the switching
frequency, L is the output inductance, D is the duty cycle
where:
×
R1 + R2 sC FF (R1||R2) + 1
sC C R C + 1
? ?
G FILTER (s) = R LOAD
K S = 1 + SLOPE SW MC
sC OUT ESR + 1
×
?
K S × (1- D) - 0.5 ?
1
G SAMPLING (s) =
s
s
( π × f ) 2
where Q C =
(V OUT /V IN ), and K S is the slope compensation factor
calculated as:
V × f × L × g
V IN -V OUT
where V SLOPE = 130mV and g MC = 80A/V.
The power modulator’s dominant pole is a function of the
parallel effects of the load resistance and the current-
loop gain’s equivalent impedance. Assuming that ESR
of the output capacitor is much smaller than the parallel
-1
sC OUT ? + ?
? 2 π × R LOAD 2 π × f SW × L ?
1
2
+
SW π × f SW × Q C
1
π × [K S × (1- D) - 0.5]
+ 1
+ 1
combination of the load and the current loop, f PMOD can
be calculated as:
The dominant poles and zeros of the transfer loop gain
are:
1 [K S × (1- D) - 0.5]
f PMOD =
+
2 π × C OUT × R LOAD 2 π × f SW × L × C OUT
f P1 <<
g M
2 π × C C × 10 AVEA(dB)/20
f ZMOD ZESR =
= f
2 π × C OUT ?
+
f SW × L
? R LOAD
f P3 = SW
f Z1 =
f Z2 =
The power modulator zero is:
1
2 π × C OUT × ESR
The total system transfer can be written as:
GAIN ( s ) = G FF ( s ) × G EA ( s ) × G MOD ( DC )
× G FILTER ( s ) × G SAMPLING ( s )
f P2 =
? 1 K S × (1- D) - 0.5 ?
1
f
2
1
2 π × C C R C
1
2 π × C OUT ESR
?
?
-1
The order of pole occurrence is:
f P1 < f P2 < f Z1 < f CO < f P3 < f Z2
???????????????????????????????????????????????????????????????? Maxim Integrated Products 18
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15112EVKIT# | 功能描述:电源管理IC开发工具 MAX15112 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 |
| MAX15112EVKIT+ | 功能描述:直流/直流开关调节器 12A Buck Converter with Integrated Switches RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15112EWG+ | 功能描述:直流/直流开关调节器 12A w/Internal Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15112EWG+T | 功能描述:直流/直流开关调节器 12A w/Internal Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15114GTM+ | 功能描述:直流/直流开关调节器 New RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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