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参数资料
| 型号： | MAX15118EVKIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/23页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT STEP-DOWN 18A MAX15118 |
| 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： | 27W |
| 输出电压： | 1.5V |
| 电流 - 输出： | 18A |
| 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： | MAX15118 |
MAX15118
High-Efficiency, 18A, Current-Mode Synchronous
Step-Down Regulator with Integrated Switches
V OUT
V COMP ? I L ?
? G MOD ?
Compensation Design Guidelines
The MAX15118 uses a fixed-frequency, peak current-
mode control scheme to provide easy compensation
and fast transient response. The inductor peak current is
monitored on a cycle-by-cycle basis and compared to the
COMP voltage (output of the voltage error amplifier). The
regulator’s duty cycle is modulated based on the induc-
tor’s peak current value. This cycle-by-cycle control of the
inductor current emulates a controlled current source. As
a result, the inductor’s pole frequency is shifted beyond
the gain bandwidth of the regulator. System stability is
provided with the addition of a simple series capacitor-
resistor from COMP to GND. This pole-zero combination
serves to tailor the desired response of the closed-loop
system. The basic regulator loop consists of a power mod-
ulator (composed of the regulator’s pulse-width modula-
tor, compensation ramp, control circuitry, MOSFETs, and
inductor), the capacitive output filter and load, an output
feedback divider, and a voltage-loop error amplifier with
its associated compensation circuitry. See Figure 2 for a
graphical representation. The power modulator’s transfer
function with respect to V COMP is:
R LOAD × I L
= = R LOAD × G MOD
? ?
? ?
where I L is the average inductor current, G MOD is the
power modulator’s transconductance, and R LOAD is the
equivalent load resistance value.
FEEDBACK
DIVIDER
V OUT
ERROR AMPLIFIER
POWER MODULATOR
COMPENSATION
V IN
RAMP
OUTPUT FILTER
AND LOAD
R1
*C FF
FB
C
g MC
V FB
COMP
Q HS
I L
V OUT
V COMP
CONTROL
LOGIC
L
DCR
I OUT
R2
g M
R OUT
R C
PWM
COMPARATOR
Q LS
ESR
R LOAD
C OUT
C C
V COMP
G MOD
V OUT
I L
REF
R OUT =
10
AVEA(dB)/20
g M
NOTE: THE G MOD STAGE SHOWN ABOVE MODELS THE AVERAGE CURRENT OF THE INDUCTOR, I L ,
INJECTED INTO THE OUTPUT LOAD, I OUT , e.g., I L = I OUT .
SUCH CAN BE USED TO SIMPLIFY/MODEL THE MODULATION/CONTROL/POWER STAGE
CIRCUITRY SHOWN WITHIN THE BOXED AREA.
*C FF IS OPTIONAL, DESIGNED TO EXTEND THE REGULATOR’S
GAIN BANDWIDTH AND INCREASED PHASE MARGIN FOR SOME
LOW-DUTY CYCLE APPLICATIONS.
Figure 2. Peak Current-Mode Regulator Transfer Model
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15118EVKIT# | 功能描述:电源管理IC开发工具 MAX15118 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 |
| MAX15118EVKIT+ | 功能描述:电流型 PWM 控制器 18A Buck Converter w/ Integrated Switches 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 |
| MAX15118EWI+ | 功能描述:电流型 PWM 控制器 18A w/Internal Switch 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 |
| MAX15118EWI+T | 功能描述:电流型 PWM 控制器 18A w/Internal Switch 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 |
| MAX15119GTM+ | 功能描述:直流/直流开关调节器 Rev 5 of the MAX17411 for Apple 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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