参数资料
| 型号： | MC34716EPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 15/27页 |
| 文件大小： | 0K |
| 描述： | IC CONVERTER DDR 26QFN |
| 标准包装： | 2,500 |
| 应用： | 转换器，DDR |
| 输入电压： | 3 V ~ 6 V |
| 输出数： | 2 |
| 输出电压： | 0.7 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 26-VFQFN 裸露焊盘 |
| 供应商设备封装： | 26-QFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
TRACKING AND SEQUENCING
This block allows the output of channel 2 of the 34716 to
track 1/2 the voltage applied at the VREFIN pin. This allows
the V REF and V TT voltages to track 1/2 V DDQ and assures that
none of them will be higher than V DDQ at any point during
normal operating conditions. For power down during a
shutdown (S5) mode, the 34716 uses internal discharge
MOSFETs (M8, M9, and M10 on Figure 2 , page 2 ) to
discharge V DDQ , V TT , and V REF respectively. These
discharge MOSFETs are only active during shutdown mode.
Using this block along with controlling the SD and STBY pins
can offer the user the device for power sequencing by
controlling when to turn the 34716 outputs on or off.
BUCK CONVERTER
This block provides the main function of the 34716: DC to
DC conversion from an un-regulated input voltage to a
regulated output voltage used by the loads for reliable
operation. The buck converter is a high performance, fixed
frequency (externally adjustable), Syncronous buck PWM
voltage-mode control with a minimum on time of 100ns .
It drives integrated 50 m ?? N-channel power MOSFETs
saving board space and enhancing efficiency. The switching
regulator output voltage is adjustable with an accuracy of less
than ±2% to meet DDR requirements. The regulator's voltage
control loop is compensated using a type III compensation
network, with external components to allow for optimizing the
loop compensation, for a wide range of operating conditions.
A typical Bootstrap circuit with an internal PMOS switch is
used to provide the voltage necessary to properly enhance
the high-side MOSFET gate.
The 34716 is designed to address DDR memory power
supplies. The integrated converter has the ability to supply up
to 5.0 A out of channel 1 and sink and source up to 3.0 A of
continuous current from channel 2, providing a full power
supply solution for DDR applications.
34716
Analog Integrated Circuit Device Data ?
Freescale Semiconductor
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC34717 | 制造商:SPC Multicomp 功能描述:HEADER R/ANGLE 4WAY 制造商:SPC Multicomp 功能描述:HEADER, R/ANGLE, 4WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONN, RECEPTACLE, 4POS, 3MM; Series:2261(5561); Pitch Spacing:3mm; Contact Termination:Through Hole Right Angle; No. of Contacts:4; No. of Rows:2; Connector Mounting:PCB; Gender:Receptacle; Contact Material:Copper Alloy ;RoHS Compliant: Yes |
| MC34717EP | 功能描述:开关变换器、稳压器与控制器 5.0A 1.0MHZ DUAL SWITCH RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MC34717EPR2 | 功能描述:开关变换器、稳压器与控制器 5.0A 1.0MHZ DUAL SWITCH RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MC34719 | 制造商:SPC Multicomp 功能描述:HEADER VERTICAL 4WAY |
| MC3471P | 制造商:Motorola Inc 功能描述: |
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