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参数资料
| 型号： | MAX1937EEI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM HYBRID 28-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 混合物 |
| 输出数： | 1 |
| 频率 - 最大： | 500kHz |
| 占空比： | 50% |
| 电源电压： | 6 V ~ 24 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 85°C |
| 封装/外壳： | 28-QSOP |
| 包装： | 管件 |
Two-Phase Desktop CPU Core Supply
Controllers with Controlled VID Change
where f SW is approximately 250kHz, Q GH is the gate
charge of the high-side MOSFET, and Q GL is the gate
charge of the low-side MOSFET. The values used for
the gate charge are at the gate drive voltage (V VLG ).
The “2” in the above equation is due to the two phases
of the converter. If multiple MOSFETs are used in paral-
lel, add the gate charges of each MOSFET to find the
total gate charge used in the above equation.
Make sure that the maximum power dissipation of the IC
is not exceeded (see the Absolute Maximum Ratings ).
Applications Information
PC Board Layout Guidelines
A properly designed PC board layout is important in any
switching DC-DC converter circuit. If possible, mount
the MOSFETs, inductor, input/output capacitors, and
rent traces short and wide to reduce the resistance in
these traces. Also make the gate-drive connections (DH_
and DL_) short and wide, measuring 10 to 20 squares
(50mils to 100mils wide if the MOSFET is 1in from the
controller IC).
Use Kelvin sense connections for the current-sense
resistors.
Place the REF capacitor, the V DD capacitor, and the
BST_ diode and capacitor as close as possible to the IC.
If the IC is far from the input capacitors, bypass V CC to
GND with an additional 0.1μF or greater ceramic capaci-
tor close to the V CC pin.
For an example PC board layout, refer to the MAX1937
or MAX1938 evaluation kit.
current-sense resistor on the top side of the PC board.
Connect the ground for these devices close together on
a power ground plane. Make all other ground connec-
tions to a separate analog ground plane. Connect the
analog ground plane to power ground at a single point.
To help dissipate heat, place high-power components
(MOSFETs, inductor, and current-sense resistor) on a
large PC board area, or use a heat sink. Keep high cur-
TRANSISTOR COUNT: 6243
PROCESS: BiCMOS
Chip Information
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21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1937EEI+ | 功能描述:DC/DC 开关控制器 2-Phase Desktop CPU Core Supply Ctlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1937EEI+T | 功能描述:DC/DC 开关控制器 2-Phase Desktop CPU Core Supply Ctlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1937EEI-T | 功能描述:开关变换器、稳压器与控制器 RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MAX1937EEI-TG069 | 制造商:Maxim Integrated Products 功能描述: |
| MAX1938EEI | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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