Electronic Components Datasheet Search
  English  ▼

Delete All


Preview PDF Download HTML

TPS65320QPWPRQ1 Datasheet(PDF) 10 Page - Texas Instruments

Click here to check the latest version.
Part # TPS65320QPWPRQ1
Description  40-V Step-Down Converter With Eco-mode??Codec and LDO Regulator
Download  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS65320QPWPRQ1 Datasheet(HTML) 10 Page - Texas Instruments

Back Button TPS65320QPWPRQ1 Datasheet HTML 6Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 7Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 8Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 9Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 10Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 11Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 12Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 13Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 34 page
background image
The TPS65320-Q1 device is a 40-V, 3.2-A, step-down (buck) converter with a 280-mA LDO linear regulator.
These two regulators both have low quiescent consumption during a light load to prolong the battery life.
The buck converter improves performance during line and load transients by implementing a constant-frequency
and current-mode control which reduces output capacitance, simplifying external frequency-compensation
design. The wide switching frequency of 100 kHz to 2500 kHz allows for efficiency and size optimization when
selecting the output-filter components. One can adjust the switching frequency by using a resistor to ground on
the RT/CLK pin. The buck converter has an internal phase-locked loop (PLL) on the RT/CLK pin that
synchronizes the power switch turnon to the falling edge of an external system clock.
The TPS65320-Q1 reduces the external component count by integrating the boot recharge diode. A capacitor
between the BOOT and SW pins supplies the bias voltage for the integrated high-side MOSFET. An
undervoltage lockout (UVLO) circuit monitors the boot capacitor voltage and turns the high-side MOSFET off
when the boot voltage falls below a preset threshold. The TPS65320-Q1 can operate at high duty cycles
because of the boot UVLO. One can step the output voltage down to as low as the 0.8-V reference. Soft start is
featured to minimize inrush currents or to provide power-supply sequencing during power up. Connect a small-
value capacitor to the pin to adjust the soft-start time. One can couple a resistor divider to the pin for critical
power-supply sequencing requirements.
The LDO regulator only consumes about 40-µA current in light load. The LDO can also track the battery when
battery voltage is low (in a cold-crank condition). The input of the LDO has a unique feature; it can auto source
the input supply from either the buck output or the battery. If both the buck and LDO are enabled, the device
switches the input of the LDO to the output of the buck to reduce heat. With the buck disabled or the buck output
voltage out of regulation (VFB1 less than 91% of VREF), the device switches the LDO input automatically to the
input voltage.
The LDO of the TPS65320-Q1 device has a power-good comparator (nRST) that asserts when the regulated
output voltage is less than 91% of the nominal output voltage.
Buck Converter
Fixed-Frequency PWM Control
The TPS65320-Q1 uses an adjustable, fixed-frequency peak current mode control. Use of external resistors on
the VFB1 pin compares the output voltage to an internal voltage reference through an error amplifier that drives
the COMP pin. An internal oscillator initiates the turnon of the high-side power switch. The device compares the
error amplifier output to the high-side power-switch current. When the power switch current reaches the level set
by the COMP voltage, the power switch turns off. The COMP pin voltage increases and decreases as the output
current increases and decreases. The device implements a current limit by clamping the COMP pin voltage to a
maximum level.
Slope Compensation Output
The TPS65320-Q1 adds a compensating ramp to the switch current signal. This slope compensation prevents
sub-harmonic oscillations. The available peak inductor current remains constant over the full duty-cycle range.
Pulse-Skip Eco-mode™ Control Scheme
The TPS65320-Q1 operates in a pulse-skip mode at light load currents to improve efficiency by reducing
switching and gate drive losses. Design of the TPS65320-Q1 is such that if the output voltage is within regulation
and the peak switch current at the end of any switching cycle is below the pulse-skipping-current threshold, the
device enters pulse-skip mode. This current threshold is the current level corresponding to a nominal COMP
voltage, or 720 mV. The current at which entry to the pulse-skip mode occurs depends on switching frequency,
inductor choice, output-capacitor selection, and compensation network.
When in pulse-skip mode, the device clamps the COMP pin voltage at 720 mV, inhibiting the high-side MOSFET.
Further decreases in load current or in output voltage cannot drive the COMP pin below this clamp-voltage level.
Submit Documentation Feedback
Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: TPS65320-Q1

Similar Part No. - TPS65320QPWPRQ1

ManufacturerPart #DatasheetDescription
Texas Instruments
Texas Instruments
TPS65320QPWPRQ1 TI1-TPS65320QPWPRQ1 Datasheet
1Mb / 45P
[Old version datasheet]   40-V Step-Down Converter With Eco-mode
More results

Similar Description - TPS65320QPWPRQ1

ManufacturerPart #DatasheetDescription
Texas Instruments
Texas Instruments
TPS65321-Q1 TI1-TPS65321-Q1 Datasheet
1Mb / 42P
[Old version datasheet]   Step-Down Converter With Eco-mode and LDO Regulator
TPS65320D-Q1 TI1-TPS65320D-Q1 Datasheet
1Mb / 42P
[Old version datasheet]   36-V Step-Down Converter With Eco-mode and LDO Regulator
TPS65321A-Q1 TI1-TPS65321A-Q1 Datasheet
4Mb / 43P
[Old version datasheet]   36-V Step-Down Converter With Eco-mode and LDO Regulator
TPS65320C-Q1 TI1-TPS65320C-Q1_16 Datasheet
1Mb / 41P
[Old version datasheet]   36-V Step-Down Converter With Eco-mode??and LDO Regulator
TPS65320-Q1 TI1-TPS65320-Q1 Datasheet
1Mb / 45P
[Old version datasheet]   40-V Step-Down Converter With Eco-mode
TPS54260QDGQRQ1 TI1-TPS54260QDGQRQ1 Datasheet
2Mb / 50P
[Old version datasheet]   3.5 V to 60 V STEP DOWN CONVERTER WITH ECO-MODE
TPS54540-Q1 TI1-TPS54540-Q1_15 Datasheet
2Mb / 44P
[Old version datasheet]   Step-Down DC-DC Converter With Eco-mode
Advanced Analogic Technologies
Advanced Analogic Techn...
AAT2506 ANALOGICTECH-AAT2506_06 Datasheet
682Kb / 26P
   1MHz Step-Down Converter/LDO Regulator
Skyworks Solutions Inc.
Skyworks Solutions Inc.
AAT2506 SKYWORKS-AAT2506 Datasheet
1Mb / 23P
   1MHz Step-Down Converter/LDO Regulator
Advanced Analogic Technologies
Advanced Analogic Techn...
AAT2506 ANALOGICTECH-AAT2506_07 Datasheet
634Kb / 26P
   1MHz Step-Down Converter/LDO Regulator
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 

Datasheet Download

Go To PDF Page

Link URL

Privacy Policy
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  |   allmanual.com