参数资料
型号: MAX1717BEEG+T
厂商: Maxim Integrated Products
文件页数: 21/33页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 24-QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
占空比: 100%
电源电压: 4.5 V ~ 5.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
This can be achieved in several ways, including the fol-
lowing two (Figure 10). By using low-impedance pull-up
resistors with the CPU’s VID pins, each pin provides the
low impedance needed for the mux to correctly inter-
pret the B-mode setting. Unfortunately, the low resis-
tances cause several mA additional quiescent current
for each of the CPU’s grounded VID pins. This quies-
cent current can be avoided by taking advantage of the
fact that D0 –D4 need only appear low impedance
briefly, not necessarily on a continuous DC basis. High-
impedance pull-ups can also be used if they are
bypassed with a large enough capacitance to make
3V TO 5.5V
A-MODE VID =
01101 → 1.35V
100k Ω
D4
D3
D2
D1
MAX1717
them appear low impedance for the 4μs sampling inter-
val. As noted in Figure 10, 4.7nF capacitors allow the
inputs to appear low impedance even though they are
pulled up with 1M Ω resistors.
D0
B-MODE VID =
01000 → 1.60V
A/B
A/B = LOW = 1.60V
A/B = HIGH = 1.35V
Figure 7. Using the Internal Mux with Hard-Wired A-Mode and
B-Mode DAC Codes
+5V
V CC
MAX1717
3V TO 5.5V
40k Ω
40k Ω
40k Ω
40k Ω
40k Ω
D4
100k Ω
D3
D2
B-DATA
LATCH
D1
D0
8k Ω
8k Ω
8k Ω
8k Ω
8k Ω
GND
Figure 8. Internal Mux B-Mode Data Test and Latch
______________________________________________________________________________________
21
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MAX1717EEG+T 功能描述:DC/DC 开关控制器 Adj Synchronous Step-Down 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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