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参数资料
| 型号： | MAX5072ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 24/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST ADJ 1A/2A 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 28 V |
| 输入电压： | 4.5 V ~ 23 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz ~ 2.2MHz |
| 电流 - 输出： | 1A，2A |
| 同步整流器： | 无 |
| 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 |
| 包装： | 管件 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
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2.2MHz, Dual-Output Buck or Boost
Converter with POR and Power-Fail Output
f C ≤
f ZERO , RHP
5
Improving Noise Immunity
In applications where the MAX5072 are subject to noisy
environments, adjust the controller’s compensation to
improve the system ’s noise immunity. In particular,
Place a zero
( f Z 1 =
1
2 π × R F × C F
)
at 0.75 x f LC .
high-frequency noise coupled into the feedback loop
causes jittery duty cycles. One solution is to lower the
crossover frequency (see the Compensation section).
C F =
1
2 π × 0 . 75 × f LC × R F
PC Board Layout Guidelines
Careful PC board layout is critical to achieve low
switching losses and clean, stable operation. This is
where R F ≥ 10k ? .
Calculate C I for a target crossover frequency, f C :
especially true for dual converters where one channel
can affect the other. Refer to the MAX5072 EV kit data
sheet for a specific layout example. Use a multilayer
? 2 ?
V OSC C O O ?
? ( 1 ? D ) + ω
× L × C
C I =
? ?
? ?
2
ω C × R F × V IN
board whenever possible for better noise immunity.
Follow these guidelines for good PC board layout:
1) For SGND, use a large copper plane under the IC
and solder it to the exposed paddle. To effectively
where ω C = 2 π f C .
( f P 1 =
Place a pole
1
)
2 π × R I × C I at f ZERO,RHP .
use this copper area as a heat exchanger between
the PC board and ambient, expose this copper area
on the top and bottom side of the PC board. Do not
make a direct connection from the exposed pad
copper plane to SGND (pin 29) underneath the IC.
R I =
1
2 π × f ZERO , RHP × C I
2) Isolate the power components and high-current
path from the sensitive analog circuitry. Use a sep-
arate PGND plane under the OUT1 and OUT2 sides
Place the second zero
( f Z 2 =
1
2 π × R 1 × C I
)
at f LC .
(referred to as PGND1 and PGND2). Connect the
PGND1 and PGND2 planes together at one point
near the IC.
3) Keep the high-current paths short, especially at the
R 1 =
1
2 π × f LC × C I
? R I
ground terminals. This practice is essential for sta-
ble, jitter-free operation.
4) Connect SGND and PGND together close to the IC
at the ground terminals of VL and V+ bypass capac-
Place the second pole
the switching frequency.
( f P 2 =
1
2 π × R F × C CF
)
at 1/2
itors. Do not connect them together anywhere else.
5) Keep the power traces and load connections short.
This practice is essential for high efficiency. Use
thick copper PC boards (2oz vs. 1oz) to enhance
C CF =
C F
( 2 π × 0 . 5 f SW × R F × C F ) ? 1
full-load efficiency.
6) Ensure that the feedback connection to C OUT is
short and direct.
7) Route high-speed switching nodes (BST_/VDD_,
SOURCE_) away from the sensitive analog areas
(BYPASS, COMP_, and FB_). Use the internal PC
board layer for SGND as EMI shields to keep radiat-
ed noise away from the IC, feedback dividers, and
analog bypass capacitors.
24
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5072ETJ+ | 功能描述:直流/直流开关转换器 2.2MHz Buck or Boost Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5072ETJ+T | 功能描述:直流/直流开关转换器 2.2MHz Buck or Boost Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5072ETJ-T | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5072EVKIT | 功能描述:电源管理IC开发工具 2.2MHz Buck or Boost Converter 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 |
| MAX5073 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2.2MHz, Dual-Output Buck or Boost Converter with Internal Power MOSFETs |
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