参数资料
| 型号： | MC34712EPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC CONVERTER DDR 24QFN |
| 标准包装： | 2,500 |
| 应用： | 转换器，DDR |
| 输入电压： | 3 V ~ 6 V |
| 输出数： | 1 |
| 输出电压： | 0.7 V ~ 1.35 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
occurred by releasing the drive on the PG pin high,
allowing the signal/pin to be pulled high by the external
pull-up resistor.
TRACKING AND SEQUENCING
This block allows the output of the 34712 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 34712 uses internal discharge MOSFETs (M5 and M6 on
discharge MOSFETs are only active during shutdown mode.
Using this block along with controlling the SD and STBY pins
can offer the user power sequencing capabilities by
controlling when to turn the 34712 outputs on or off.
BUCK CONVERTER
This block provides the main function of the 34712: DC to
regulated output voltage used by the loads for reliable
operation. The buck converter is a high performance, fixed
frequency (externally adjustable), synchronous buck PWM
voltage-mode control. 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 ±2.0% to meet DDR
requirements. Its output has the ability to track 1/2 the voltage
applied at the VREFIN pin. 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 34712 is designed to address DDR memory power
supplies. The integrated converter has the ability to both sink
and source up to 3.0 A of continuous current, making it
suitable for bus termination power supplies.
DC conversion from an un-regulated input voltage to a
34712
Analog Integrated Circuit Device Data ?
Freescale Semiconductor
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC34713 | 制造商:SPC Multicomp 功能描述:HEADER R/ANGLE 20WAY 制造商:SPC Multicomp 功能描述:HEADER, R/ANGLE, 20WAY |
| MC34713EP | 功能描述:开关变换器、稳压器与控制器 SINGLE SWITCH REG 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 |
| MC34713EPR2 | 功能描述:开关变换器、稳压器与控制器 SINGLE SWITCH REGULATOR 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 |
| MC34715 | 制造商:SPC Multicomp 功能描述:HEADER VERTICAL 2WAY 制造商:SPC Multicomp 功能描述:HEADER, VERTICAL, 2WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONN, RECEPTACLE, 2POS, 3MM; Series:2261(5561); Pitch Spacing:3mm; Contact Termination:Through Hole Vertical; No. of Contacts:2; No. of Rows:2; Connector Mounting:PCB; Gender:Receptacle; Contact Material:Copper Alloy ;RoHS Compliant: Yes |
| MC34716EP | 功能描述:开关变换器、稳压器与控制器 DUAL SWITCH REG 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 |
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