数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

LD2985AM285R 数据表(PDF) 9 Page - STMicroelectronics

部件名 LD2985AM285R
功能描述  VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LD2985AM285R 数据表(HTML) 9 Page - STMicroelectronics

Back Button LD2985AM285R Datasheet HTML 5Page - STMicroelectronics LD2985AM285R Datasheet HTML 6Page - STMicroelectronics LD2985AM285R Datasheet HTML 7Page - STMicroelectronics LD2985AM285R Datasheet HTML 8Page - STMicroelectronics LD2985AM285R Datasheet HTML 9Page - STMicroelectronics LD2985AM285R Datasheet HTML 10Page - STMicroelectronics LD2985AM285R Datasheet HTML 11Page - STMicroelectronics LD2985AM285R Datasheet HTML 12Page - STMicroelectronics LD2985AM285R Datasheet HTML 13Page - STMicroelectronics  
Zoom Inzoom in Zoom Outzoom out
 9 / 13 page
background image
LD2985 SERIES
9/13
Figure 13 : Load Transient
Figure 14 : Load Transient
EXTERNAL CAPACITORS
Like any low-dropout regulator, the LD2985 requires external capacitors for regulator stability. This
capacitor must be selected to meet the requirements of minimum capacitance and equivalent series
resistance. We suggest to solder input and output capacitors as close as possible to the relative pins.
INPUT CAPACITOR
An input capacitor whose value is 1µF is required with the LD2985 (amount of capacitance can be
increased without limit). This capacitor must be located a distance of not more than 0.5" from the input pin
of the device and returned to a clean analog ground. Any good quality ceramic, tantalum or film capacitors
can be used for this capacitor.
OUTPUT CAPACITOR
The LD2985 is designed specifically to work with ceramic output capacitors. It may also be possible to use
Tantalum capacitors, but these are not as attractive for reasons of size and cost. By the way, the output
capacitor must meet both the requirement for minimum amount of capacitance and E.S.R. (equivalent
series resistance) value. Due to the different loop gain, the stability improves for higher output versions
and so the suggested minimum output capacitor value, if low E.S.R. ceramic type is used, is 1µF for
output voltages equal or major than 3.8V, 2.2µF for VO going from 1.8 to 3.3V, and 3.3µF for the other
versions. However, if an output capacitor lower than the suggested one is used, it's possible to make
stable the regulator adding a resistor in series to the capacitor.
IMPORTANT:
The output capacitor must maintain its ESR in the stable region over the full operating temperature to
assure stability. Also, capacitor tolerance and variation with temperature must be considered to assure
the minimum amount of capacitance is provided at all times. This capacitor should be located not more
than 0.5" from the output pin of the device and returned to a clean analog ground.
INHIBIT INPUT OPERATION
The inhibit pin can be used to turn OFF the regulator when pulled low, so drastically reducing the current
consumption down to less than 1µA. When the inhibit feature is not used, this pin must be tied to VI to
keep the regulator output ON at all times. To assure proper operation, the signal source used to drive the
inhibit pin must be able to swing above and below the specified thresholds listed in the electrical
characteristics section under VIH VIL. Any slew rate can beusedto drive theinhibit.
VO=2.5V, IO=0 to 50mA,no CI, CO=10µF,ts=tf=2ns
VO=2.5V, IO=0 to 50mA,no CI, CO=4.7µF,ts=tf=2ns


类似零件编号 - LD2985AM285R

制造商部件名数据表功能描述
logo
STMicroelectronics
LD2985AM28R STMICROELECTRONICS-LD2985AM28R Datasheet
340Kb / 21P
   Very low drop and low noise voltage regulator low ESR capacitors compatible, with inhibit function
LD2985AM28R STMICROELECTRONICS-LD2985AM28R Datasheet
344Kb / 21P
   Very low drop and low noise voltage regulator low ESR capacitors compatible, with inhibit function
More results

类似说明 - LD2985AM285R

制造商部件名数据表功能描述
logo
STMicroelectronics
LD2982 STMICROELECTRONICS-LD2982 Datasheet
296Kb / 13P
   VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE
logo
Unisonic Technologies
LD1985 UTC-LD1985_05 Datasheet
424Kb / 10P
   VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
logo
E-Tech Electronics LTD
LD1985 ETL-LD1985 Datasheet
294Kb / 9P
   VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
logo
Unisonic Technologies
LD2985 UTC-LD2985_V01 Datasheet
359Kb / 16P
   VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE,WITH INHIBIT FUNCTION
LD2985 UTC-LD2985 Datasheet
148Kb / 10P
   VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
LD1985 UTC-LD1985_10 Datasheet
253Kb / 10P
   VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
logo
E-Tech Electronics LTD
LD2985 ETL-LD2985 Datasheet
355Kb / 15P
   VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
logo
STMicroelectronics
LD2985AXX STMICROELECTRONICS-LD2985AXX Datasheet
340Kb / 21P
   Very low drop and low noise voltage regulator low ESR capacitors compatible, with inhibit function
LD2985AXX STMICROELECTRONICS-LD2985AXX_09 Datasheet
344Kb / 21P
   Very low drop and low noise voltage regulator low ESR capacitors compatible, with inhibit function
LD2982AXX STMICROELECTRONICS-LD2982AXX Datasheet
329Kb / 20P
   Very low drop and low noise voltage regulator with inhibit function, low ESR capacitors compatible
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com