收藏本站
AMD Mobile Serial VID Dual-Phase
Fixed-Frequency Controller
Table 2. Component Suppliers
MANUFACTURER
AVX
BI Technologies
Central Semiconductor
Fairchild Semiconductor
International Rectifier
KEMET
NEC Tokin
Panasonic
WEBSITE
www.avxcorp.com
www.bitechnologies.com
www.centralsemi.com
www.fairchildsemi.com
www.irf.com
www.kemet.com
www.nec-tokin.com
www.panasonic.com
MANUFACTURER
Pulse
Renesas
SANYO
Siliconix (Vishay)
Sumida
Taiyo Yuden
TDK
TOKO
WEBSITE
www.pulseeng.com
www.renesas.com
www.secc.co.jp
www.vishay.com
www.sumida.com
www.t-yuden.com
www.component.tdk.com
www.tokoam.com
Standard Application Circuits
The MAX17009 standard application circuit (Figure 2)
generates two independent 18A outputs for AMD
mobile CPU applications. See Table 1 for component
selections. Table 2 lists the component manufacturers.
Detailed Description
The MAX17009 consists of a dual-fixed-frequency PWM
controller that generates the supply voltage for two inde-
pendent CPU cores. A reference buffer output
(NBV_BUF) sets the regulation voltage for a separate
NB regulator. The CPU cores can be configured as
independent outputs, or as a combined output based
on the GNDS2 pin strap (GNDS2 pulled to 1.5V - 1.8V,
which are the respective voltages for DDR3 and DDR2).
Both SMPS outputs and the NB buffer can be pro-
grammed to any voltage in the VID table (see Table 4)
using the SVI. The CPU is the SVI bus master, while the
MAX17009 is the SVI slave. Voltage transitions are
commanded by the CPU as a single-step command
from one VID code to another. The MAX17009 slews
the SMPS outputs at the slew rate programmed by the
external R TIME resistor. For the NB buffer, the slew rate
is set by the combination of R TIME and the total capaci-
tance on the output of the buffer.
By default, the MAX17009 SMPSs are always in pulse-
skip mode. In separate mode, the PSI_L bit does not
change the mode of operation, but removes the
+12.5mV offset, if enabled by the OPTION pin. In com-
bined mode, the PSI_L bit removes the +12.5mV offset
and switches from 2-phase to 1-phase operation. The
NB_SKP output always follows the state of PSI_L for the
NB regulator.
+5V Bias Supply (V CC , V DD )
The MAX17009 requires an external 5V bias supply in
addition to the battery. Typically, this 5V bias supply is
the notebook’s main 95%-efficient 5V system supply.
Keeping the bias supply external to the IC improves
efficiency and eliminates the cost associated with the
5V linear regulator that would otherwise be needed to
supply the PWM circuit and gate drivers.
The 5V bias supply powers both the PWM controller
and internal gate-drive power, so the maximum current
drawn is:
I BIAS = I CC + f SW Q G = 10mA to 60mA (typ)
where I CC is provided in the Electrical Characteristics
table, and f SW Q G (per phase) is the driver’s supply cur-
rent, as defined in the MOSFET’s data sheet. If the +5V
bias supply is powered up prior to the battery supply,
the enable signal ( SHDN going from low to high) must
be delayed until the battery voltage is present to ensure
startup.
Switching Frequency (OSC)
Connect a resistor (R OSC ) between OSC and GND to
set the switching frequency (per phase):
f SW = 300kHz x 143k Ω / R OSC
A 35.7k Ω to 432k Ω corresponds to switching frequencies
of 1.2MHz to 100kHz, respectively. High-frequency
(1.2MHz) operation optimizes the application for the
smallest component size, trading off efficiency due to
higher switching losses. This may be acceptable in
ultra-portable devices where the load currents are lower
and the controller is powered from a lower voltage sup-
ply. Low-frequency (100kHz) operation offers the best
overall efficiency at the expense of component size and
board space. Minimum on-time (t ON(MIN) ) must also be
taken into consideration. See the Switching frequency
bullet in the SMPS Design Procedure section.
20
______________________________________________________________________________________
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MAX17410GTM+ IC CTLR QPWM 2PH FOR IMV 48TQFN
MC2711H SWITCH BUSHING PLUNGER W/SEAL
MC2711 SWITCH BUSHING MOUNT PLUNGER
MC7711 SWITCH BUSHING MOUNT PLUNGER
MCA7711 SWITCH BUSHING MOUNT PLUNGER
MCD2711 SWITCH BUSHING MOUNT PLUNGER
MCD7711 SWITCH BUSHING MOUNT PLUNGER
MCZ2010AH900 CHOKE COMMON MODE 90 OHM SMD
相关代理商/技术参数
MAX17009GTL+T 功能描述:其他电源管理 AMD Dual-Phase CPU Controller RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel
MAX1700EEE 功能描述:直流/直流开关转换器 1-3 Cell 1A Step-Up DC/DC Converters RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX1700EEE+ 功能描述:直流/直流开关转换器 1-3 Cell 1A Step-Up DC/DC Converters RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX1700EEE+T 功能描述:直流/直流开关转换器 1-3 Cell 1A Step-Up DC/DC Converters RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX1700EEE-T 功能描述:直流/直流开关转换器 1-3 Cell 1A Step-Up DC/DC Converters RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX17010AETL+ 功能描述:LCD 驱动器 Internal-Switch Boost Regulator RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube
MAX17010AETL+T 功能描述:LCD 驱动器 Internal-Switch Boost Regulator RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube
MAX17010ETL+ 功能描述:LCD 驱动器 Internal-Switch Boost Regulator RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube