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參數資料
| 型號： | EN5311QI |
| 廠商： | ENPIRION INC |
| 元件分類： | 穩(wěn)壓器 |
| 中文描述： | 1 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, QCC20 |
| 封裝： | 5 X 5 MM, 1.10 MM HEIGHT, HAOLGEN FREE AND ROHS COMPLIANT, QFN-20 |
| 文件頁數： | 14/16頁 |
| 文件大小： | 290K |
| 代理商： | EN5311QI |
03799
11/24/2009
Rev:B
EN5311QI
Enpirion 2009 all rights reserved, E&OE
7
www.enpirion.com
Detailed Description
Functional Overview
The EN5311QI is a complete DCDC converter
solution requiring only two low cost MLCC
capacitors.
MOSFET
switches,
PWM
controller,
Gate-drive,
compensation,
and
inductor are integrated into the tiny 5mm x
4mm x 1.1mm package to provide the smallest
footprint possible while maintaining high
efficiency, low ripple, and high performance.
The converter uses voltage mode control to
provide the simplest implementation and high
noise immunity. The device operates at a high
switching
frequency.
The
high
switching
frequency allows for a wide control loop
bandwidth
providing
excellent
transient
performance. The high switching frequency
enables the use of very small components
making possible this unprecedented level of
integration.
Enpirion’s
proprietary
power
MOSFET
technology provides very low switching loss at
frequencies of 4 MHz and higher, allowing for
the use of very small internal components, and
very wide control loop bandwidth.
Unique
magnetic design allows for integration of the
inductor into the very low profile 1.1mm
package. Integration of the inductor virtually
eliminates the design/layout issues normally
associated
with
switch-mode
DCDC
converters. All of this enables much easier
and faster integration into various applications
to meet demanding EMI requirements.
Output voltage is chosen from seven preset
values via a three pin VID voltage select
scheme. An external divider option enables
the selection of any voltage in the 0.6V to VIN-
0.6V range. This reduces the number of
components that must be qualified and
reduces inventory burden. The VID pins can
be toggled on the fly to implement glitch free
dynamic voltage scaling.
Protection features include under-voltage lock-
out (UVLO), over-current protection (OCP),
short circuit protection, and thermal overload
protection.
Integrated Inductor
Enpirion has introduced the world’s first
product family featuring integrated inductors.
The use of an internal inductor localizes the
noises associated with the output loop
currents. The inherent shielding and compact
construction of the integrated inductor reduces
the radiated noise that couples into the traces
of the circuit board.
Further, the package
layout is optimized to reduce the electrical path
length for the AC ripple currents that are a
major source of radiated emissions from DCDC
converters.
The
integrated
inductor
significantly reduces parasitic effects that can
harm loop stability, and makes layout very
simple.
Soft Start
Internal soft start circuits limit in-rush current
when the device starts up from a power down
condition or when the “ENABLE” pin is
asserted “high”. Digital control circuitry limits
the VOUT ramp rate to levels that are safe for
the Power MOSFETS and the integrated
inductor.
The EN5311QI operates in a constant slew
rate when the output voltage is programmed
with an internal VID code. The EN5311QI,
when in external resistor divider mode, has a
constant start up time.
Please refer to the
Electrical Characteristics table for soft-start
slew rates and soft-start time
Excess bulk capacitance on the output of the
device can cause an over-current condition at
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相關代理商/技術參數 |
參數描述 |
|---|---|
| EN5311QI-E | 功能描述:電源管理IC開發(fā)工具 Eval Board EN5311QI 1A Sync. Buck Convtr RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| EN5312Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Fully Integrated Voltage Mode Synchronous Buck PWM DC-DC Converter Module |
| EN5312QI | 功能描述:開關變換器、穩(wěn)壓器與控制器 1A Sync Buck Reg w/ Integrated Inductor RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| EN5312QI-E | 功能描述:電源管理IC開發(fā)工具 1A Synchronous Buck Regulator Eval Board RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| EN5312QI-T | 功能描述:開關變換器、穩(wěn)壓器與控制器 1A Sync Buck Reg RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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