Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

AME5130AEEVADJZ Fiches technique(PDF) 7 Page - Analog Microelectronics

No de pièce AME5130AEEVADJZ
Description  Micropower Step-Up DC/DC Converter
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  AME [Analog Microelectronics]
Site Internet  http://www.ame.com.tw/
Logo AME - Analog Microelectronics

AME5130AEEVADJZ Fiches technique(HTML) 7 Page - Analog Microelectronics

Back Button AME5130AEEVADJZ Datasheet HTML 3Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 4Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 5Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 6Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 7Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 8Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 9Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 10Page - Analog Microelectronics AME5130AEEVADJZ Datasheet HTML 11Page - Analog Microelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 16 page
background image
AME, Inc.
7
AME5130
Micropower Step-Up DC/DC Converter
n Electrical Specifications
The AME5130 features a constant off-time control
scheme. Operation can be best understood by referring
to Figure 3. When the voltage at the FB pin is less than
0.9V, the Enable Comp in Figure 3 enables the device
and the NMOS switch is turmed on pulling the SW pin to
ground. When the NMOS switch is on, current is sup-
plied by the output capacitor C
OUT. Once the current in
the inductor reaches the peak current limit, the 400ns
One Shot turns off the NMOS switch. The SW voltage
will then rise to the output voltage plus a diode drop and
the inductor current will begin to decrease as shown in
Figure 3. During this time the energy stored in the induc-
tor is transferred to C
OUT and the load. After the 400ns
off-time the NMOS switch is turned on and energy is
stored in the inductor again. This energy transfer from
the inductor to the output causes a stepping effect in
the output ripple.
This cycle is continued until the voltage at FB reaches
1.23V. When FB reaches this voltage, the enable com-
parator then disables the device turning off the NMOS
switch and reducing the Iq of the device to 64
µA. The
load current is then supplied solely by C
OUT indicated
by the gradually decreasing slope at the output. When
the FB pin drops slightly below 1.23V, the enable com-
parator enables the device and begins the cycle de-
scribed previously. The RUN pin can be used to turn off
the AME5130 and reduce the Iq to 0.01
µA. In shutdown
mode the output voltage will be a diode drop lower than
the input voltage.
n Application Information
INDUCTOR SELECTION
The appropriate inductor for a given application is
calculated using the following equation:
Where V
D is the schottky diode voltage, I CL is the
switch current limit found in the Typical Performance Char-
acteristics section, and T
OFF is the switch off time. When
using this equation be sure to use in minimum input volt-
age for the application, such as for battery powered ap-
plications.
Choosing inductors with low ESR decrease power
lossed and increase efficiency.
Care should be taken when choosing an inductor. For
applications that require an input voltage that approaches
the output voltage, such as when converting a Li-ion bat-
tery voltage to 5V, the 400ns off time may not be enough
time to discharge the energy in the inductor and transfer
the energy to the output capacitor and load. This can
cause a ramping effect in the inductor current waveform
and an increased ripple on the output voltage. Using a
smaller inductor will cause the I
PK to increase and will
increase the output voltage ripple further. This can be
solved by adding a 4.7pF capacitor across the R1 feed-
back resistor (Figure 3) and slightly increasing the out-
put capacitor. A smaller inductor can then be used to
ensure proper discharge in the 400ns off time.
DIODE SELECTION
To maintain high efficiency, the average current rating
of the schottky diode should be larger than the peak in-
ductor current, I
PK. Schottky diodes with a low forward
drop and fast switching speeds are ideal for increasing
efficiency in portable applications. Choose a reverse break-
down of the schottky diode larger than the output volt-
age.
OFF
CL
D
IN(min)
OUT
T
I
V
V
V
L


+
=


Numéro de pièce similaire - AME5130AEEVADJZ

FabricantNo de pièceFiches techniqueDescription
logo
Analog Microelectronics
AME5130AEEVADJZ AME-AME5130AEEVADJZ Datasheet
550Kb / 16P
   Micropower Step-Up DC/DC Converter
More results

Description similaire - AME5130AEEVADJZ

FabricantNo de pièceFiches techniqueDescription
logo
Aimtron Technology
AT1303 AIMTRON-AT1303 Datasheet
205Kb / 10P
   MICROPOWER STEP UP DC/DC CONVERTER
logo
Analog Microelectronics
AME5130 AME-AME5130_1 Datasheet
550Kb / 16P
   Micropower Step-Up DC/DC Converter
AME5138 AME-AME5138 Datasheet
533Kb / 16P
   Micropower Step-Up DC/DC Converter
logo
Taiwan Memory Technolog...
T6309B TMT-T6309B Datasheet
131Kb / 11P
   Micropower Step-up DC/DC Converter
T6309A TMT-T6309A Datasheet
364Kb / 13P
   Micropower Step-up DC/DC Converter
logo
STMicroelectronics
ST5R00 STMICROELECTRONICS-ST5R00 Datasheet
680Kb / 15P
   MICROPOWER VFM STEP-UP DC/DC CONVERTER
logo
Advanced Power Electron...
APE2903 A-POWER-APE2903 Datasheet
100Kb / 7P
   MICROPOWER VFM STEP-UP DC/DC CONVERTER
logo
Linear Technology
LT1944 LINER-LT1944 Datasheet
164Kb / 8P
   Dual Micropower Step-Up DC/DC Converter
logo
Advanced Power Electron...
APE2902 A-POWER-APE2902 Datasheet
350Kb / 8P
   MICROPOWER VFM STEP-UP DC/DC CONVERTER
logo
Linear Technology
LT1944-1 LINER-LT1944-1 Datasheet
161Kb / 8P
   Dual Micropower Step-Up DC/DC Converter
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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