- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄171838 > EN5311QI (ENPIRION INC) PDF資料下載
參數(shù)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(shù)： | 15/16頁 |
| 文件大?。?/td> | 290K |
| 代理商： | EN5311QI |
03799
11/24/2009
Rev:B
EN5311QI
Enpirion 2009 all rights reserved, E&OE
8
www.enpirion.com
startup.
Assuming no-load at startup, the
maximum total capacitance on the output,
including the output filter capacitor, bulk and
decoupling capacitance, at the load, is given
as:
In VID Mode:
COUT_TOTAL_MAX = COUT_Filter + COUT_BULK = 700uF
In external divider mode:
COUT_TOTAL_MAX = 1.22x10-3/VOUT Farads
The nominal value for COUT is 10uF. See the
applications section for more details.
Over Current/Short Circuit Protection
The current limit function is achieved by
sensing the current flowing through a sense P-
MOSFET which is compared to a reference
current. When this level is exceeded the P-
FET is turned off and the N-FET is turned on,
pulling VOUT low. This condition is maintained
for a period of 1mS and then a normal soft start
is initiated. If the over current condition still
persists, this cycle will repeat in a “hick-up”
mode.
Under Voltage Lockout
During initial power up an under voltage
lockout circuit will hold-off the switching
circuitry until the input voltage reaches a
sufficient level to insure proper operation. If
the voltage drops below the UVLO threshold
the lockout circuitry will again disable the
switching. Hysteresis is included to prevent
chattering between states.
Enable
The ENABLE pin provides a means to shut
down
the
converter
or
enable
normal
operation. A logic low will disable the converter
and cause it to shut down. A logic high will
enable the converter into normal operation. In
shutdown mode, the device quiescent current
will be less than 1 uA.
NOTE:
This pin must not be left floating.
Thermal Shutdown
When excessive power is dissipated in the
chip, the junction temperature rises. Once the
junction temperature exceeds the thermal
shutdown temperature the thermal shutdown
circuit turns off the converter output voltage
thus allowing the device to cool. When the
junction temperature decreases by 15C
°, the
device will go through the normal startup
process.
Application Information
Output Voltage Select
To provide the highest degree of flexibility in
choosing output voltage, the EN5311QI uses a
3 pin VID, or Voltage ID, output voltage select
arrangement.
This allows the designer to
choose one of seven preset voltages, or to use
an external voltage divider.
Internally, the
output of the VID multiplexer sets the value for
the voltage reference DAC, which in turn is
connected to the non-inverting input of the
error amplifier. This allows the use of a single
feedback divider with constant loop gain and
optimum compensation, independent of the
output voltage selected.
Table 1 shows the various VS0-VS2 pin logic
states and the associated output voltage
levels. A logic “1” indicates a connection to VIN
or to a “high” logic voltage level. A logic “0”
indicates a connection to ground or to a “l(fā)ow”
logic voltage level. These pins can be either
hardwired to VIN or GND or alternatively can be
driven by standard logic levels. Logic low is
defined as VLOW ≤ 0.4V. Logic high is defined
as VHIGH ≥ 1.4V. Any level between these two
相關PDF資料 |
PDF描述 |
|---|---|
| EN5335QI | |
| EN5365QI | |
| EN5366QI | |
| ENA2O-D16-R00064 | OPTICAL INTREMNETA ENCDES |
| ENA2O-D16-R0020000256 | OPTICAL INTREMNETA ENCDES |
相關代理商/技術參數(shù) |
參數(shù)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。