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参数资料
| 型号： | MAX5090CATE/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/17页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 16WQFN |
| 产品变化通告： | Product Discontinuation 28/Nov/2011 |
| 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： | 1.27 V ~ 11 V |
| 输入电压： | 6.5 V ~ 76 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 127kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
2A, 76V, High-Efficiency MAXPower Step-Down
DC-DC Converters
? V OQ =
In a dynamic load application, the allowable deviation
of the output voltage during the fast transient load dic-
tates the output capacitance value and the ESR. The
output capacitors supply the step-load current until the
controller responds with a greater duty cycle. The
response time (t RESPONSE ) depends on the closed-
loop bandwidth of the converter. The resistive drop
across the capacitor ESR and capacitor discharge
cause a voltage droop during a step-load. Use a com-
bination of low-ESR tantalum and ceramic capacitors
for better transient load and ripple/noise performance.
Use the following equations to calculate the deviation of
output voltage due to the ESR and capacitance value
of the output capacitor:
? V OESR = I STEP x ESR OUT
I STEP x t RESPONSE
C OUT
where I STEP is the load step and t RESPONSE is the
response time of the controller. Controller response
time is approximately one-third of the reciprocal of the
closed-loop unity-gain bandwidth, 20kHz typically.
Board Layout Guidelines
1) Minimize ground noise by connecting the anode of
the Schottky rectifier, the input bypass capacitor
ground lead, and the output filter capacitor ground
lead to a large PGND plane.
2) Minimize lead lengths to reduce stray capacitance,
trace resistance, and radiated noise. In particular,
place the Schottky rectifier diode right next to the
device. Also, place the BST and VD bypass capaci-
tors very close to the device.
3) Connect the exposed pad of the IC to the SGND
plane. Do not make a direct connection between the
exposed pad plane and SGND (pin 7) under the IC.
Connect the exposed pad and pin 7 to the SGND
plane separately. Connect the ground connection of
the feedback resistive divider, ON/ OFF threshold
resistive divider, and the soft-start capacitor to the
SGND plane. Connect the SGND plane and PGND
plane at one point near the input bypass capacitor
at V IN .
4) Use large SGND plane as a heatsink for the
MAX5090. Use large PGND and LX planes as
heatsinks for the rectifier diode and the inductor.
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5090EVKIT | 功能描述:电源管理IC开发工具 MAX5090 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 |
| MAX5091 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:28V, 100mA, Low-Quiescent-Current LDO with Reset and Power-Fail Input/Output |
| MAX5091AASA+ | 功能描述:低压差稳压器 - LDO 28V 100mA Low-Q LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX5091AASA+T | 功能描述:低压差稳压器 - LDO 28V 100mA Low-Q LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX5091AATA+ | 制造商:Maxim Integrated Products 功能描述:28V, 100MA, LOW-QUIESCENT-CURRENT LDO WITH RESET AND POWER-F - Rail/Tube |
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