Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

TPS61103PW Datasheet(PDF) 5 Page - Texas Instruments

Part # TPS61103PW
Description  DUAL-OUTPUT, SINGLE-CELL BOOST CONVERTER
Download  35 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS61103PW Datasheet(HTML) 5 Page - Texas Instruments

  TPS61103PW Datasheet HTML 1Page - Texas Instruments TPS61103PW Datasheet HTML 2Page - Texas Instruments TPS61103PW Datasheet HTML 3Page - Texas Instruments TPS61103PW Datasheet HTML 4Page - Texas Instruments TPS61103PW Datasheet HTML 5Page - Texas Instruments TPS61103PW Datasheet HTML 6Page - Texas Instruments TPS61103PW Datasheet HTML 7Page - Texas Instruments TPS61103PW Datasheet HTML 8Page - Texas Instruments TPS61103PW Datasheet HTML 9Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 35 page
background image
www.ti.com
DETAILED DESCRIPTION
SYNCHRONOUS RECTIFIER
CONTROLLER CIRCUIT
DEVICE ENABLE
LDO ENABLE
POWER GOOD
TPS61100, TPS61103
TPS61106, TPS61107
SLVS411B – JUNE 2002 – REVISED APRIL 2004
The device integrates an N-channel and a P-channel MOSFET transistor to realize a synchronous rectifier.
Because the commonly used discrete Schottky rectifier is replaced with a low RDS(ON) PMOS switch, the power
conversion efficiency reaches 95%. To avoid ground shift due to the high currents in the NMOS switch, two
separate ground pins are used. The reference for all control functions is the GND pin. The source of the NMOS
switch is connected to PGND. Both grounds must be connected on the PCB at only one point close to the GND
pin. A special circuit is applied to disconnect the load from the input during shutdown of the converter. In
conventional synchronous rectifier circuits, the backgate diode of the high-side PMOS is forward biased in
shutdown and allows current flowing from the battery to the output. This device however uses a special circuit
which takes the cathode of the backgate diode of the high-side PMOS and disconnects it from the source when
the regulator is not enabled (EN = low).
The benefit of this feature for the system design engineer is that the battery is not depleted during shutdown of
the converter. No additional components have to be added to the design to make sure that the battery is
disconnected from the output of the converter.
The controller circuit of the device is based on a fixed frequency multiple feedforward controller topology. Input
voltage, output voltage, and voltage drop on the NMOS switch are monitored and forwarded to the regulator. So
changes in the operating conditions of the converter directly affect the duty cycle and must not take the indirect
and slow way through the control loop and the error amplifier. The control loop, determined by the error amplifier,
only has to handle small signal errors. The input for it is the feedback voltage on the FB pin or, at fixed output
voltage versions, the voltage on the internal resistor divider. It is compared with the internal reference voltage to
generate an accurate and stable output voltage.
The peak current of the NMOS switch is also sensed to limit the maximum current flowing through the switch and
the inductor. The nominal peak current limit is set to 1500 mA.
An internal temperature sensor prevents the device from getting overheated in case of excessive power
dissipation.
The device is put into operation when EN is set high. It is put into a shutdown mode when EN is set to GND. It
also can be enabled with a low signal on ENPB. This forces the converter to start up as long as the low signal is
applied. During this time EN must be set high to prevent the converter from going down into shutdown mode
again. If EN is high, a negative signal on ENPB is ignored.
In shutdown mode, the regulator stops switching, all internal control circuitry including the low-battery comparator
is switched off, and the load is isolated from the input (as described in the synchronous rectifier section). This
also means that the output voltage can drop below the input voltage during shutdown. During start-up of the
converter, the duty cycle and the peak current are limited in order to avoid high peak currents drawn from the
battery.
An undervoltage lockout function prevents device start-up if the supply voltage on VBAT is lower than
approximately 0.7 V. When in operation and the battery is being discharged, the device automatically enters the
shutdown mode if the voltage on VBAT drops below approximately 0.7 V. This undervoltage lockout function is
implemented in order to prevent the malfunctioning of the converter.
When the voltage is applied at VBAT, the LDO can be separately enabled and disabled by using the LDOEN pin
in the same way as the EN pin at the dc/dc converter stage described above.
The PGOOD pin stays high impedance when the dc/dc converter delivers an output voltage within a defined
voltage window. So it can be used to enable the converter after pushbutton start-up, or to enable any connected
circuitry such as cascaded converters (LDO) or processor circuits.
5
Not Recommended for New Designs


Similar Part No. - TPS61103PW

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS61103PW TI-TPS61103PW Datasheet
507Kb / 28P
[Old version datasheet]   DUAL-OUTPUT, SINGLE-CELL BOOST CONVERTER
More results

Similar Description - TPS61103PW

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS61100 TI-TPS61100 Datasheet
507Kb / 28P
[Old version datasheet]   DUAL-OUTPUT, SINGLE-CELL BOOST CONVERTER
TPS61000 TI1-TPS61000_15 Datasheet
600Kb / 25P
[Old version datasheet]   Single- and Dual-Cell Boost Converter
logo
Vishay Siliconix
SIP12502 VISHAY-SIP12502 Datasheet
268Kb / 11P
   500 mA - Fixed Output Boost Converter for Single or Dual Cell
Rev. B, 03-Aug-09
SIP12503 VISHAY-SIP12503 Datasheet
232Kb / 11P
   500-mA - Adjustable Boost Converter for Single or Dual Cell
Rev. B, 03-Aug-09
logo
Analog Microelectronics
AME5172 AME-AME5172 Datasheet
108Kb / 12P
   0.85V Single Cell Boost DC-DC Converter
logo
Texas Instruments
TPS61007 TI-TPS61007 Datasheet
393Kb / 22P
[Old version datasheet]   SINGLE- AND DUAL-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD
TPS61000 TI1-TPS61000_12 Datasheet
997Kb / 26P
[Old version datasheet]   SINGLE- AND DUAL-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD
logo
Richtek Technology Corp...
RT4832A RICHTEK-RT4832A Datasheet
1Mb / 26P
   Sub PMIC with Dual-Output Boost Converter
logo
Texas Instruments
TPS61000 TI-TPS61000 Datasheet
389Kb / 22P
[Old version datasheet]   SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD
logo
Fitipower Integrated Te...
FP6711 FITIPOWER-FP6711 Datasheet
678Kb / 13P
   High-Efficiency, 1-Cell and 2-Cell Boost Converter
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


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   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