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参数资料
| 型号： | MAX1717EEG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 31/33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： | 50 |
| 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： | 是 |
| 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： | -40°C ~ 85°C |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
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Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
ALL ANALOG GROUNDS
CONNECT TO LOCAL PLANE ONLY
MAX1717
VIA TO GND
NEAR Q2 SOURCE
V BATT
GND IN
V CC
CC
Q1
CIN
GND
OUT
REF
V DD
D1
Q2
COUT
V OUT
GND VIA TO SOURCE
OF Q2
CONNECT LOCAL ANALOG GROUND PLANE DIRECTLY TO GND FROM
R6
THE SIDE OPPOSITE THE V DD CAPACITOR GND TO AVOID V DD GROUND
CURRENTS FROM FLOWING IN THE ANALOG GROUND PLANE.
L1
VIA TO FB
AND FBS
VIA TO LX
NOTES: "STAR" GROUND IS USED.
D1 IS DIRECTLY ACROSS Q2.
INDUCTOR DISCHARGE PATH HAS LOW DC RESISTANCE
Figure 12. Power-Stage PC Board Layout Example
is at the junction of the inductor and the positioning
resistor.
7) Route high-speed switching nodes away from sensitive
analog areas (CC, REF, ILIM). Make all pin-strap
control input connections (SKP/ SDN , ILIM, etc.) to ana-
log ground or V CC rather than power ground or V DD .
Layout Procedure
1) Place the power components first, with ground termi-
nals adjacent (Q2 source, CIN-, COUT-, D1 anode).
If possible, make all these connections on the top
layer with wide, copper-filled areas.
2) Mount the controller IC adjacent to MOSFET Q2,
preferably on the back side opposite Q2 in order to
keep LX-GND current-sense lines and the DL drive line
short and wide. The DL gate trace must be short and
wide, measuring 10 to 20 squares (50mils to 100mils
wide if the MOSFET is 1 inch from the controller IC).
3) Group the gate-drive components (BST diode and
capacitor, V DD bypass capacitor) together near the
controller IC.
4) Make the DC-DC controller ground connections as
shown in Figure 12. This diagram can be viewed as
having three separate ground planes: output ground,
where all the high-power components go; the GND
plane, where the GND pin and V DD bypass capacitors
go; and an analog ground plane where sensitive
analog components go. The analog ground plane
and GND plane must meet only at a single point
directly beneath the IC. These two planes are then
connected to the high-power output ground with a
short connection from GND to the source of the low-
side MOSFET Q2 (the middle of the star ground).
This point must also be very close to the output
capacitor ground terminal.
5) Connect the output power planes (VCORE and system
ground planes) directly to the output filter capacitor
positive and negative terminals with multiple vias.
Place the entire DC-DC converter circuit as close to
the CPU as is practical.
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1717EEG+ | 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 |
| MAX1717EEG+C71058 | 功能描述:DC/DC 开关控制器 Step-Down Controller for Notebook CPU 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 |
| 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 |
| MAX1717EEG-C71058 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1717EEG-T | 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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