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参数资料
| 型号： | MAX8717ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/30页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR PWR SUP 28-TQFN |
| 标准包装： | 2,500 |
| 应用： | 控制器，笔记本电脑电源系统 |
| 输入电压： | 4 V ~ 26 V |
| 输出数： | 2 |
| 输出电压： | 3.3V，5V，1 V ~ 5.5 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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Interleaved High-Efficiency, Dual Power-Supply
Controllers for Notebook Computers
REF
MAX8717/MAX8756/MAX8757
R
2.0V
V CC
FSEL
OSC
R
REF
GND
SKIP1
ON1
ILIM1
CSH1
CSL1
SKIP2
ON2
ILIM2
CSH2
CSL2
BST1
DH1
LX1
V DD
DL1
PWM1
CONTROLLER
(FIGURE 3)
PWM2
CONTROLLER
(FIGURE 3)
V DD
BST2
DH2
LX2
DL2
PGND
FB
FB
FB1
PGOOD1
DECODE
(FIGURE 5)
POWER-GOOD AND
FAULT PROTECTION
(FIGURE 7)
POWER-GOOD AND
FAULT PROTECTION
(FIGURE 7)
DECODE
(FIGURE 5)
FB2
PGOOD2
Figure 2. Functional Diagram
SMPS Enable Controls (ON1, ON2)
ON1 and ON2 provide independent control of output
soft-start and soft-shutdown. This allows flexible control
of startup and shutdown sequencing. The outputs can
be started simultaneously, sequentially, or indepen-
dently. To provide sequential startup, connect ON_ of
one regulator to PGOOD_ of the other. For example,
with ON1 connected to PGOOD2, OUT1 soft-starts after
OUT2 is in regulation. Drive ON_ low to clear the over-
voltage, undervoltage, and thermal fault latches.
Soft-Start and Soft-Shutdown
Soft-start begins when ON_ is driven high and REF is in
regulation. During soft-start, the output is ramped up
from 0V to the final set voltage in 2ms. This reduces
inrush current and provides a predictable ramp-up time
for power sequencing.
Soft-shutdown begins after ON_ goes low, an output
undervoltage fault occurs, or a thermal fault occurs.
The two outputs are independent. A fault at one output
does not trigger shutdown of the other. During soft-
shutdown the output is ramped down to 0V in 4ms,
reducing negative inductor currents that can cause
negative voltages on the output. At the end of soft-shut-
down, DL_ is driven high until startup is again triggered
by a rising edge of ON_. The reference is turned off
when both outputs have been shut down.
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8717EVKIT | 制造商:Maxim Integrated Products 功能描述:HIGH-EFFICIENCY DUAL POWER-SUPPLY - Rail/Tube |
| MAX8718ETA | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE LOW-POWER LINEAR REGU - Rail/Tube |
| MAX8718ETA+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX8718ETA-T | 功能描述:低压差稳压器 - 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 |
| MAX8719ETA | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE LOW-POWER LINEAR REGU - Rail/Tube |
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