Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

L6928D013TR Datasheet(PDF) 6 Page - STMicroelectronics

Part # L6928D013TR
Description  HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
Download  9 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6928D013TR Datasheet(HTML) 6 Page - STMicroelectronics

  L6928D013TR Datasheet HTML 1Page - STMicroelectronics L6928D013TR Datasheet HTML 2Page - STMicroelectronics L6928D013TR Datasheet HTML 3Page - STMicroelectronics L6928D013TR Datasheet HTML 4Page - STMicroelectronics L6928D013TR Datasheet HTML 5Page - STMicroelectronics L6928D013TR Datasheet HTML 6Page - STMicroelectronics L6928D013TR Datasheet HTML 7Page - STMicroelectronics L6928D013TR Datasheet HTML 8Page - STMicroelectronics L6928D013TR Datasheet HTML 9Page - STMicroelectronics  
Zoom Inzoom in Zoom Outzoom out
 6 / 9 page
background image
L6928D
6/9
4.4 Loop Stability
Since the device is realized with a current mode architecture, the loop stability is usually not a big issue. For
most of the application a 220pF connected between the COMP pin and ground is enough to guarantee the sta-
bility. In case very low ESR capacitors are used for the output filter, such as multilayer ceramic capacitors, the
zero introduced by the capacitor itself can shift at very high frequency and the transient loop response could be
affected. Adding a series resistor to the 220pF capacitor can solve this problem.
The right value for the resistor (in the range of 50K) can be determined by checking the load transient response
of the device. Basically, the output voltage has to be checked at the scope after the load steps required by the
application. In case of stability problems, the output voltage could oscillates before to reach the regulated value
after a load step.
5
ADDITIONAL FEATURES AND PROTECTIONS
5.1 DROPOUT Operation
The Li-Ion battery voltage ranges from approximately 3V and 4.1V-4.2V (depending on the anode material). In
case the regulated output voltage is from 2.5V and 3.3V, it can be that, close to the end of the battery life, the
battery voltage goes down to the regulated one. In this case the device stops to switch, working at 100% of duty
cycle, so minimizing the dropout voltage and the device losses.
5.2 PGOOD (Power Good Output)
A power good output signal is available. The VFB pin is internally connected to a comparator with a threshold
set at 90% of the of reference voltage (0.6V). Since the output voltage is connected to the VFB pin by a resistor
divider, when the output voltage goes lower than the regulated value, the VFB pin voltage goes lower than 90%
of the internal reference value. The internal comparator is triggered and the PGOOD pin is pulled down.
The pin is an open drain output and so, a pull up resistor should be connected to him.
If the feature is not required, the pin can be left floating.
5.3 ADJUSTABLE OUTPUT VOLTAGE
The output voltage can be adjusted by an external resistor divider from a minimum value of 0.6V up to the input
voltage. The output voltage value is given by:
5.4 OVP (Overvoltage Protection)
The device has an internal overvoltage protection circuit to protect the load.
If the voltage at the feedback pin goes higher than an internal threshold set 10% (typ) higher than the reference
voltage, the low side power mosfet is turned on until the feedback voltage goes lower than the reference one.
During the overvoltage circuit intervention, the zero crossing comparator is disabled so that the device is also
able to sink current.
5.5 THERMAL SHUTDOWN
The device has also a thermal shutdown protection activated when the junction temperature reaches 150°C. In
this case both the high side MOSFET and the low side one are turned off. Once the junction temperature goes
back lower than 95°C, the device restarts the normal operation.
V
OUT
0.6
1
R
2
R
1
-------
+
⎝⎠
⎛⎞
=


Similar Part No. - L6928D013TR

ManufacturerPart #DatasheetDescription
logo
STMicroelectronics
L6928D013TR STMICROELECTRONICS-L6928D013TR Datasheet
264Kb / 16P
   High efficiency monolithic synchronous step down regulator
L6928D013TR STMICROELECTRONICS-L6928D013TR Datasheet
194Kb / 16P
   High efficiency monolithic synchronous step down regulator
More results

Similar Description - L6928D013TR

ManufacturerPart #DatasheetDescription
logo
Linear Technology
LTC1878 LINER-LTC1878 Datasheet
225Kb / 16P
   High Efficiency Monolithic Synchronous Step-Down Regulator
logo
STMicroelectronics
L6926 STMICROELECTRONICS-L6926_06 Datasheet
203Kb / 17P
   High efficiency monolithic synchronous step down regulator
L6925D STMICROELECTRONICS-L6925D Datasheet
57Kb / 5P
   HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6928 STMICROELECTRONICS-L6928_11 Datasheet
194Kb / 16P
   High efficiency monolithic synchronous step down regulator
L6925D STMICROELECTRONICS-L6925D_04 Datasheet
57Kb / 6P
   HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
logo
Linear Technology
LTC1877 LINER-LTC1877 Datasheet
225Kb / 16P
   High Efficiency Monolithic Synchronous Step-Down Regulator
logo
STMicroelectronics
L6926 STMICROELECTRONICS-L6926_08 Datasheet
260Kb / 16P
   High efficiency monolithic synchronous step down regulator
logo
Linear Technology
LTC1878 LINER-LTC1878_15 Datasheet
239Kb / 16P
   High Efficiency Monolithic Synchronous Step-Down Regulator
logo
STMicroelectronics
L6926D STMICROELECTRONICS-L6926D Datasheet
90Kb / 8P
   HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6926 STMICROELECTRONICS-L6926 Datasheet
119Kb / 11P
   HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
More results


Html Pages

1 2 3 4 5 6 7 8 9


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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