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参数资料
| 型号： | MAX17000EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 28/32页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX17000 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 特殊用途 DC/DC，DDR 存储器电源 |
| 输出及类型： | 3，非隔离 |
| 功率 - 输出： | 19.8W |
| 输出电压： | 1.8V，0.9V，0.9V |
| 电流 - 输出： | 10A，2A，3mA |
| 输入电压： | 7 ~ 20 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 300kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX17000 |
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MAX17000
Complete DDR2 and DDR3 Memory
Power-Management Solution
V OUT FB × ? 1 + FBA ?
= V
where I VALLEY(MAX) is the maximum valley current
allowed by the current-limit circuit, including threshold
tolerance and on-resistance variation. The MOSFETs
must have a good size heatsink to handle the overload
power dissipation.
Choose a Schottky diode (DL) with a forward voltage
low enough to prevent the low-side MOSFET body
diode from turning on during the dead time. Select a
diode that can handle the load current during the dead
times. This diode is optional and can be removed if effi-
ciency is not critical.
Setting the PWM Output Voltage
Preset Output Voltages
The MAX17000 ’s Dual Mode ? operation allows the
selection of common voltages without requiring external
components. Connect FB to AGND for a fixed 1.5V out-
put, to V CC for a fixed 1.8V output, or connect FB
directly to OUT for a fixed 1.0V output.
Adjustable Output Voltage
The output voltage can be adjusted from 1.0V to 2.7V
using a resistive voltage-divider (Figure 8). The
MAX17000 regulates FB to a fixed reference voltage
(1.0V). The adjusted output voltage is:
? R ?
? R FBB ?
where V FB is 1.0V.
VTTI Input Capacitor
Stability Considerations
The value of the VTTI bypass capacitor is chosen to
limit the amount of ripple/noise at VTTI, and the amount
of voltage dip during a load transient. Typically, VTTI is
connected to the output of the buck regulator, which
already has a large bulk capacitor. Nevertheless, a
ceramic capacitor of equivalent value to the VTT output
capacitor must be used and must be added and
placed as close as possible to the VTTI pin. This value
must be increased with larger load current, or if the
trace from the VTTI pin to the power source is long and
has significant impedance.
Setting VTT Output Voltage
The VTT output stage is powered from the VTTI input.
The output voltage is set by the REFIN input. REFIN sets
the feedback regulation voltage (VTTR = VTTS =
V REFIN ) of the MAX17000. Connect a 0.1V to 2.0V volt-
age input to set the adjustable output for VTT, VTTS, and
VTTR. If REFIN is tied to V CC , the internal CSL/2 divider
is used to set VTT voltage; hence, VTT tracks the V CSL
voltage and is set to V CSL /2. This feature makes the
MAX17000 ideal for memory applications in which the
termination supply must track the supply voltage.
VTT Output Capacitor Selection
A minimum value of 9μF is needed to stabilize a 300mA
VTT output. This value of capacitance limits the regula-
tor’s unity-gain bandwidth frequency to approximately
1.2MHz (typ) to allow adequate phase margin for stabil-
ity. To keep the capacitor acting as a capacitor within
the regulator’s bandwidth, it is important that ceramic
capacitors with low ESR and ESL be used.
LX
L1
V OUT
DL
N L
D1
C OUT
PGND1
CSH
CSL
MAX17000
R FBA
FB
R FBB
Figure 8. Setting VOUT with a Resistive Voltage-Divider
Dual Mode is a trademark of Maxim Integrated Products, Inc.
28
Maxim Integrated
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相关代理商/技术参数 |
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|---|---|
| MAX17000EVKIT+ | 功能描述:电源管理IC开发工具 MAX17000 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17003AETJ+ | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX17003AETJ+T | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX17003ETJ+ | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX17003ETJ+T | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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