Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

LMR22007YYZFR Datasheet(PDF) 11 Page - Texas Instruments

Part # LMR22007YYZFR
Description  LMR22007 2.7V - 20V, 750mA Step-Down Converter with Adjustable Input Current Limit
Download  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LMR22007YYZFR Datasheet(HTML) 11 Page - Texas Instruments

Back Button LMR22007YYZFR Datasheet HTML 7Page - Texas Instruments LMR22007YYZFR Datasheet HTML 8Page - Texas Instruments LMR22007YYZFR Datasheet HTML 9Page - Texas Instruments LMR22007YYZFR Datasheet HTML 10Page - Texas Instruments LMR22007YYZFR Datasheet HTML 11Page - Texas Instruments LMR22007YYZFR Datasheet HTML 12Page - Texas Instruments LMR22007YYZFR Datasheet HTML 13Page - Texas Instruments LMR22007YYZFR Datasheet HTML 14Page - Texas Instruments LMR22007YYZFR Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 24 page
background image
IN
OUT
ON
LPSM(peak)
(V
V
) t
i
L
K

OUT
ON
IN
V
t
478ns
V

K
0
0
VIN
-VD1
t
t
D = tON / TSW
ttONt
ttOFFt
VSW
iL
tTSWt
IOUT
ILPK
tûiLt
LMR22007
www.ti.com
SNVS985A – OCTOBER 2013 – REVISED OCTOBER 2013
The LMR22007 synchronous switched mode power converters are based on DCS-Control™ (Direct Control with
Seamless Transition into Power Save Mode), an advanced regulation topology, that combines the advantages of
hysteretic, voltage mode and current mode control including an AC loop directly associated to the output voltage.
This control loop takes information about output voltage changes and feeds it directly to a fast comparator stage.
It sets the switching frequency, which is constant for steady state operating conditions, and provides immediate
response to dynamic load changes. To get accurate DC load regulation, a voltage feedback loop is used. The
internally compensated regulation network achieves fast and stable operation with small external components
and low ESR capacitors.
The DCS-Control™ topology supports PWM (Pulse Width Modulation) mode for medium and heavy load
conditions and a Power Save Mode at light loads. During PWM, it operates at its nominal switching frequency in
continuous conduction mode. This frequency is typically about 2.1 MHz with a controlled frequency variation
depending on the input voltage. If the load current decreases, the converter enters Power Save Mode to sustain
high efficiency down to very light loads. In Power Save Mode the switching frequency decreases linearly with the
load current. Since DCS-Control™ supports both operation modes within one single building block, the transition
from PWM to Power Save Mode is seamless without effects on the output voltage.
Detailed Description of Pins and Key Functions
POWER SAVE MODE OPERATION
The LMR22007's built in Power Save Mode will be entered seamlessly, if the load current decreases. This
secures a high efficiency in light load operation. The device remains in Power Save Mode as long as the inductor
current is discontinuous.
In Power Save Mode the switching frequency decreases linearly with the load current maintaining high efficiency.
The transition into and out of Power Save Mode happens within the entire regulation scheme and is seamless in
both directions.
The LMR22007 includes a fixed on-time circuitry. This on-time, in steady-state operation, can be estimated as:
(1)
For very small output voltages, an absolute minimum on-time of about 77ns is kept to limit switching losses.
Using tON, the typical peak inductor current in Power Save Mode can be approximated by:
(2)
When VIN decreases to typically 15% above VOUT, the LMR22007 won't enter Power Save Mode, regardless of
the load current. The device maintains output regulation in PWM mode.
ENABLE (EN)
The simplest way to enable the operation of the LMR22007 is to connect the EN pin to VIN which allows self
start-up of the LMR22007 when the input voltage is applied. A resistor value of less than 3k
Ω is recomended.
Copyright © 2013, Texas Instruments Incorporated
Submit Documentation Feedback
11
Product Folder Links: LMR22007


Similar Part No. - LMR22007YYZFR

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
LMR22007YYZFR TI1-LMR22007YYZFR Datasheet
2Mb / 24P
[Old version datasheet]   LMR22007 2.7V - 20V, 750mA Step-Down Converter with Adjustable Input Current Limit
More results

Similar Description - LMR22007YYZFR

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
LMR22007 TI1-LMR22007 Datasheet
2Mb / 24P
[Old version datasheet]   LMR22007 2.7V - 20V, 750mA Step-Down Converter with Adjustable Input Current Limit
logo
Skyworks Solutions Inc.
AAT1138 SKYWORKS-AAT1138 Datasheet
3Mb / 21P
   2A Step-Down Converter with Adjustable Input Current Limit
logo
MPS Industries, Inc.
MP8794 MPSIND-MP8794 Datasheet
1Mb / 22P
   16V, 20A, Synchronous, Step-Down Converter with Adjustable Current Limit,
Rev. 1.0 12/2/2019
logo
Monolithic Power System...
MP2110 MPS-MP2110 Datasheet
619Kb / 15P
   3A Synchronous Step-Down Converter with Programmable Input Current Limit
MP2115 MPS-MP2115 Datasheet
461Kb / 11P
   2A Synchronous Step-Down Converter with Programmable Input Current Limit
logo
Texas Instruments
LM3242 TI1-LM3242 Datasheet
1Mb / 32P
[Old version datasheet]   750mA Miniature Adjustable Step-Down DC-DC Converter
REVISED AUGUST 2015
logo
Monolithic Power System...
MPQ8623 MPS-MPQ8623 Datasheet
1Mb / 20P
   16V, 6A, High Efficiency, Synchronous, Step-Down Converter with Adjustable Current Limit
MPQ8626 MPS-MPQ8626 Datasheet
1Mb / 23P
   16V, 6A, High Efficiency, Synchronous,Step-Down Converter with Adjustable Current Limit
Rev. 1.1 8/16/2022
logo
National Semiconductor ...
LM2679 NSC-LM2679 Datasheet
355Kb / 24P
   SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit
LM2673 NSC-LM2673 Datasheet
451Kb / 26P
   SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24


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