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

X  

MC34710EWR2 Fiches technique(PDF) 9 Page - Freescale Semiconductor, Inc

No de pièce MC34710EWR2
Description  Dual Output DC-DC & Linear Regulator IC
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC34710EWR2 Fiches technique(HTML) 9 Page - Freescale Semiconductor, Inc

Back Button MC34710EWR2 Datasheet HTML 5Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 6Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 7Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 8Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 9Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 10Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 11Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 12Page - Freescale Semiconductor, Inc MC34710EWR2 Datasheet HTML 13Page - Freescale Semiconductor, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 17 page
background image
Analog Integrated Circuit Device Data
Freescale Semiconductor
9
34710
FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
VI/O Switching Regulator
The VI/O switching regulator output voltage is determined
by the Mode digital input terminals. The 34710’s Mode
terminals select the output voltage. For example, if Mode2,
Mode1, and Mode0 are set to 0, 0, 0 (respectively) then VI/O
will be set to 5.0 V; if Mode2, Mode1, and Mode0 are all left
floating (i.e., Open, Open, and Open), then the voltage for
VI/O will be set to 3.3 V. Table 2 provides the truth table for
setting the various combination of regulator outputs via the
Mode pins.
The topology of the regulator is a hysteretic buck regulator
operating from the internal ~200 kHz oscillator.
VCORE Linear Regulator
The VCORE linear LDO (low drop-out) regulator can
produce either a +3.3 V, 2.5 V, 1.8 V, or 1.5 V output voltage
at currents up to 500 mA. The input to the VCORE regulator
is a terminal that may be connected to the VI/O regulator
output or to an external power supply. Note, the minimum
input voltage level must be equal to or greater than the
selected VCORE voltage + 0.8 V. (I.e., 0.8V is the LDO
regulator drop out voltage.)
The Mode terminals select the output voltage as depicted
in Table 2.
FUNCTIONAL TERMINAL DESCRIPTION
Power Supply Input (B+)
Main supply voltage for the VI/O Switching Regulator and
general chip bias circuitry.
Core Voltage Regulator Input (Lin B+)
Supply voltage for the VCORE Regulator. May be provided
by the VI/O regulator output or from an independent supply.
Mode Control (MODE 0,1,2)
Mode select terminals to select the VI/O and VCORE output
voltages per table 2. Pull to ground for low state, float for high
state.
Switching Capacitors 1 and 2 (CP1/CP2)
Terminals for the Charge Pump capacitor.
Boost Voltage (VB)
The Boost Voltage is an output terminal used for the
charge pump boost voltage and is a connection point for the
Charge Pump bulk capacitor.It provides a gate drive for the
VI/O Switch FET.
Reset (RST)
Reset is an output terminal for supervisory functions. This
terminal is in high state during normal operation and low state
during fault conditions. This terminal has no input function
and requires an external pull-up resistor.
The RST terminal is an open drain output driver to prevent
oscillations during the transition. It is recommended to
connect a 0.1 uF capacitor between the CT pin and RST pin.
Note: error conditions must be present for a minimum time,
tFILTER, before the 34710 responds to them. Once all error
conditions have been cleared, RST is held low for an
additional time of tDELAY.
Reset Delay Capacitor (CT)
This terminal is the external delay. It is used with a
capacitor to ground to delay RST turn-on time and to RST to
prevent RST oscillations during chip power-on.
VI/O Switching Regulator Feedback (VFB)
This terminal is the feedback input for the VI/O Switching
Regulator and the output of the regulator application.
VI/O Switching Regulator output (VSWITCH)
This terminal is the Switching output for the VI/O Buck
Regulator. It has internal high side FET.
Table 2. VI/O and VCORE Regulator
Output Voltage Selection
Mode2
Mode1
Mode0
VI/O (V)
VCORE (V)
00
0
5.0
3.3
0
0
Open
3.3
2.5
0
Open
0
5.0
1.8
0
Open
Open
3.3
1.8
Open
0
0
5.0
2.5
Open
0
Open
3.3
2.5
Open
Open
0
5.0
1.5
Open
Open
Open
3.3
1.5
Open indicates terminal is not connected externally (i.e. floating).


Numéro de pièce similaire - MC34710EWR2

FabricantNo de pièceFiches techniqueDescription
logo
Freescale Semiconductor...
MC34710EWR2 FREESCALE-MC34710EWR2 Datasheet
459Kb / 18P
   Dual Output DC-DC & Linear Regulator IC
More results

Description similaire - MC34710EWR2

FabricantNo de pièceFiches techniqueDescription
logo
Freescale Semiconductor...
MC34710 FREESCALE-MC34710 Datasheet
459Kb / 18P
   Dual Output DC-DC & Linear Regulator IC
logo
Texas Instruments
LP3907 TI1-LP3907 Datasheet
3Mb / 58P
[Old version datasheet]   Dual High-Current Step-Down DC-DC and Dual Linear Regulator
LP3907-Q1 TI1-LP3907-Q1 Datasheet
3Mb / 53P
[Old version datasheet]   Dual High-Current Step-Down DC-DC And Dual Linear Regulator
logo
Fairchild Semiconductor
FSAR001 FAIRCHILD-FSAR001 Datasheet
498Kb / 12P
   AC-DC Linear Regulator
logo
Richtek Technology Corp...
RT9204 RICHTEK-RT9204 Datasheet
282Kb / 14P
   Dual Regulator - Standard Buck PWM DC-DC and Linear Power Controller
logo
Toshiba Semiconductor
TB7110F TOSHIBA-TB7110F Datasheet
497Kb / 18P
   Buck DC-DC Converter IC媛딺eries Regulator IC
logo
Micrel Semiconductor
MIC2230 MICREL-MIC2230 Datasheet
1Mb / 18P
   Dual Synchronous DC/DC Regulator
logo
Linear Technology
LTC3548-1 LINER-LTC3548-1_15 Datasheet
329Kb / 16P
   Dual Synchronous, Fixed Output 2.25MHz Step-Down DC/DC Regulator
LTC3548-1 LINER-LTC3548-1 Datasheet
938Kb / 16P
   Dual Synchronous, Fixed Output 2.25MHz Step-Down DC/DC Regulator
logo
Maxim Integrated Produc...
MAX8614A MAXIM-MAX8614A Datasheet
398Kb / 15P
   Dual-Output ( and -) DC-DC
Rev 0; 3/06
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17


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