Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

LM5088MH-2 Datasheet(PDF) 10 Page - Texas Instruments

No. de pieza LM5088MH-2
Descripción Electrónicos  LM5088, LM5088-Q1 Wide Input Range Non-Synchronous Buck Controller
Download  36 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

LM5088MH-2 Datasheet(HTML) 10 Page - Texas Instruments

Back Button LM5088MH-2 Datasheet HTML 6Page - Texas Instruments LM5088MH-2 Datasheet HTML 7Page - Texas Instruments LM5088MH-2 Datasheet HTML 8Page - Texas Instruments LM5088MH-2 Datasheet HTML 9Page - Texas Instruments LM5088MH-2 Datasheet HTML 10Page - Texas Instruments LM5088MH-2 Datasheet HTML 11Page - Texas Instruments LM5088MH-2 Datasheet HTML 12Page - Texas Instruments LM5088MH-2 Datasheet HTML 13Page - Texas Instruments LM5088MH-2 Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 36 page
background image
1.2V
STANDBY
0.4V
SHUTDOWN
VIN
5.0V
EN
RUV1
5 PA
LM5088
RUV2
1 k:
8V
RRT =
152 pF
1
fSW
- 280 ns
LM5088, LM5088-Q1
SNVS600H – DECEMBER 2008 – REVISED MARCH 2013
www.ti.com
Oscillator and Sync Capability
The LM5088 oscillator frequency is set by a single external resistor connected between the RT pin and the GND
pin. The RT resistor should be located very close to the device. To set a desired oscillator frequency (fSW), the
necessary value of RT resistor can be calculated from the following equation:
(1)
The RT pin can also be used to synchronize the internal oscillator to an external clock. The internal oscillator is
synchronized to an external clock by AC coupling a positive edge into the RT/SYNC pin. The RT/SYNC pin
voltage must exceed 3V to trip the internal clock synchronization pulse detector. The free-running frequency
should be set nominally 15% below the external clock frequency and the pulse width applied to the RT/SYNC pin
must be less than 150ns. Synchronization to an external clock more than twice the free-running frequency can
produce abnormal behavior of the pulse-width modulator.
Figure 16. Basic Enable Configuration
Error Amplifier and PWM Comparator
The internal high gain error amplifier generates an error signal proportional to the difference between the
regulated output voltage and an internal precision voltage reference (1.205V). The output of the error amplifier is
connected to the COMP pin allowing the user to connect loop compensation components. Generally a type II
network, as illustrated in Block Diagram, is sufficient. This network creates a pole at DC, a mid-band zero for
phase boost and a high frequency pole for noise reduction. The PWM comparator compares the emulated
current signal from the RAMP generator to the error amplifier output voltage at the COMP pin. A typical control
loop gain/phase plot is shown in Typical Performance Characteristics.
Ramp Generator
The ramp signal used for the pulse width modulator in current mode control is typically derived directly from the
buck switch current. This signal corresponds to the positive slope portion of the buck inductor current. Using this
signal for the PWM ramp simplifies the control loop transfer function to a single pole response and provides
inherent input voltage feed-forward compensation. The disadvantage of using the buck switch current signal for
PWM control is the large leading edge spike due to circuit parasitics which must be filtered or blanked. Also, the
current measurement may introduce significant propagation delays. The filtering time, blanking time and
propagation delay limit the minimum achievable pulse width. In applications where the input voltage may be
10
Submit Documentation Feedback
Copyright © 2008–2013, Texas Instruments Incorporated
Product Folder Links: LM5088 LM5088-Q1


Número de pieza similar - LM5088MH-2

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
National Semiconductor ...
LM5088MH-2 NSC-LM5088MH-2 Datasheet
545Kb / 26P
   Wide Input Range Non-Synchronous Buck Controller
logo
Texas Instruments
LM5088MH-2/NOPB TI-LM5088MH-2/NOPB Datasheet
1Mb / 39P
[Old version datasheet]   Wide Input Range Non-Synchronous Buck Controller
More results

Descripción similar - LM5088MH-2

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
LM25088 TI-LM25088_15 Datasheet
1Mb / 39P
[Old version datasheet]   LM25088, LM25088-Q1 Wide Input Range Non-Synchronous Buck Controller
LM5088 TI-LM5088_15 Datasheet
1Mb / 39P
[Old version datasheet]   Wide Input Range Non-Synchronous Buck Controller
logo
National Semiconductor ...
LM5088 NSC-LM5088 Datasheet
545Kb / 26P
   Wide Input Range Non-Synchronous Buck Controller
LM25088 NSC-LM25088 Datasheet
541Kb / 26P
   Wide Input Range Non-Synchronous Buck Controller
logo
Texas Instruments
LM25088 TI1-LM25088_14 Datasheet
1Mb / 33P
[Old version datasheet]   Wide Input Range Non-Synchronous Buck Controller
LM5088 TI1-LM5088_14 Datasheet
1Mb / 36P
[Old version datasheet]   Wide Input Range Non-Synchronous Buck Controller
LM5141-Q1 TI-LM5141-Q1_V01 Datasheet
2Mb / 49P
[Old version datasheet]   LM5141-Q1 Wide Input Range Synchronous Buck Controller
logo
Shenzhen Huazhimei Semi...
HM1485 HMSEMI-HM1485 Datasheet
788Kb / 10P
   Wide Input Range Synchronous Buck Controller
logo
Texas Instruments
LM34937 TI1-LM34937 Datasheet
722Kb / 31P
[Old version datasheet]   Wide Input Range Synchronous Buck Controller
LM5141-Q1 TI1-LM5141-Q1 Datasheet
2Mb / 42P
[Old version datasheet]   Wide Input Range Synchronous Buck Controller
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 25 26 27 28 29 30 31 32 33 34 35 36


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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