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参数资料
| 型号： | MAX16977RATE/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/18页 |
| 文件大小： | 0K |
| 描述： | IC BUCK SYNC ADJ 2A 16TQFN |
| 标准包装： | 60 |
| 类型： | 降压（降压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 5V，1 V ~ 10 V |
| 输入电压： | 3.5 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz ~ 2.2MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 包装： | * |
| 供应商设备封装： | * |
MAX16977
36V, 2A, 2.2MHz Step-Down Converter
with Low Operating Current
Therefore:
have adequate cooling. The bottom pad of the device
× g m,EA C × =
f zMOD
GAIN MOD(fC) ×
V FB
V OUT
× R 1
f C
must be soldered down to this copper plane for effec-
tive heat dissipation and for getting the full power out
of the IC. Use multiple vias or a single large via in this
R C =
C C =
C F =
Solving for R C :
V OUT × f C
g m,EA × V FB × GAIN MOD(fC) × f zMOD
Set the error-amplifier compensation zero formed by R C
and C C at the f pMOD (f zEA = f pMOD )
1
2 π × f pMOD × R C
If f zMOD is less than 5 x f C , add a second capacitor C F
from COMP to GND. Set f pEA = f zMOD and calculate C F
as follows:
1
2 π × f zMOD × R C
PCB Layout Guidelines
Careful PCB layout is critical to achieve low switching
losses and clean, stable operation. Use a multilayer
board whenever possible for better noise immunity and
power dissipation. Follow these guidelines for good PCB
layout:
1) Use a large contiguous copper plane under the IC
package. Ensure that all heat-dissipating components
Maxim Integrated
plane for heat dissipation.
2) Isolate the power components and high-current path
from the sensitive analog circuitry. This is essential to
prevent any noise coupling into the analog signals.
3) Keep the high-current paths short, especially at the
ground terminals. This practice is essential for stable,
jitter-free operation. The high-current path composed
of input capacitor, high-side FET, inductor, and the
output capacitor should be as short as possible.
4) Keep the power traces and load connections short.
This practice is essential for high efficiency. Use
thick copper PCBs (2oz vs. 1oz) to enhance full-load
efficiency.
5) The analog signal lines should be routed away from
the high-frequency planes. This ensures integrity of
sensitive signals feeding back into the IC.
6) The ground connection for the analog and power
section should be close to the IC. This keeps the
ground current loops to a minimum. In cases where
only one ground is used, enough isolation between
analog return signals and high-power signals must
be maintained.
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16977RAUE/V+ | 功能描述:直流/直流开关转换器 36V 2A 2.2MHz Step-Down Cvtr 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 |
| MAX16977RAUE/V+T | 功能描述:直流/直流开关转换器 36V 2A 2.2MHz Step-Down Cvtr 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 |
| MAX16977RAUE+ | 制造商:Maxim Integrated Products 功能描述:36V, 2A, 2.2MHZ STEP-DOWN CONVERTER WITH LOW OPERATING CURRE - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC REG BUCK SYNC 5V/ADJ 16TSSOP |
| MAX16977RAUE+T | 制造商:Maxim Integrated Products 功能描述:36V, 2A, 2.2MHZ STEP-DOWN CONVERTER WITH LOW OPERATING CURRE - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC REG BUCK SYNC 5V/ADJ 16TSSOP |
| MAX16977SATE/V+ | 功能描述:直流/直流开关转换器 36V 2A 2.2MHz Step-Down 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 |
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