TPS54380

Manufacturer Part NumberTPS54380
ManufacturerTexas Instruments
TPS54380 datasheet
 


Specifications of TPS54380

Iout(max)(a)3Vin(min)(v)3
Vin(max)(v)6Vout(min)(v)0.9
Vout(max)(v)4.5Iq(typ)(ma)6.2
Switching Frequency(max)(khz)700Switch Current Limit(typ)(a)4
TopologyBuckOperating Temperature Range(c)-40 to 85
Pin/package20HTSSOPDuty Cycle(max)(%)90
Regulated Outputs(#)1  
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3-V TO 6-V INPUT, 3-A OUTPUT TRACKING SYNCHRONOUS BUCK
PWM SWITCHER WITH INTEGRATED FETs (SWIFT™) FOR SEQUENCING
FEATURES
D
Power-Up/Down Tracking for Sequencing
D
60-mΩ MOSFET Switches for High Efficiency
at 3-A Continuous Output Source or Sink
Current
D
Wide PWM Frequency:
Fixed 350 kHz or Adjustable 280 kHz to
700 kHz
D
Power Good and Enable
D
Load Protected by Peak Current Limit and
Thermal Shutdown
D
Integrated Solution Reduces Board Area and
Component Count
APPLICATIONS
D
Low-Voltage, High-Density Distributed Power
Systems
D
Point of Load Regulation for
High-Performance DSPs, FPGAs, ASICs, and
Microprocessors Requiring Sequencing
D
Broadband, Networking, and Optical
Communications Infrastructure
SIMPLIFIED SCHEMATIC
I/O Supply
Input
VIN
TPS54380
BOOT
PGND
TRACKIN
VSENSE
VBIAS
AGND
COMP
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD and SWIFT are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Typical Size
6,4 mm X 6,6 mm
DESCRIPTION
As a member of the SWIFT™ family of dc/dc regulators,
the TPS54380 low-input voltage, high-output current,
synchronous buck PWM converter integrates all
required active components. Using the TRACKIN pin
with other regulators, simultaneous power up and down
are easily implemented. Included on the substrate with
the listed features are a true, high-performance, voltage
error amplifier that enables maximum performance and
flexibility in choosing the output filter L and C
components; an undervoltage-lockout circuit to prevent
start-up until the input voltage reaches 3 V; an internally
or externally set slow-start circuit to limit inrush
currents; and a power-good output useful for
processor/logic reset.
The TPS54380 is available in a thermally enhanced
20-pin TSSOP (PWP) PowerPAD™ package, which
eliminates bulky heatsinks. TI provides evaluation
modules and the SWIFT™ designer software tool to aid
in quickly achieving high-performance power supply
designs to meet aggressive equipment development
cycles.
Core Supply
PH
TPS54380
SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005
START-UP WAVEFORM
R
= 1 Ω
L
VI/O = 3.3 V
Vcore = 1.8 V
1 ms/div
Copyright © 2003, Texas Instruments Incorporated

TPS54380 Summary of contents

  • Page 1

    ... The TPS54380 is available in a thermally enhanced 20-pin TSSOP (PWP) PowerPAD™ package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT™ designer software tool to aid ...

  • Page 2

    ... A −40°C to 85°C (1) The PWP package is also available taped and reeled. Add an R suffix to the device type (i.e., TPS54380PWPR). See the application section of the data sheet for PowerPAD drawing and layout information. (2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www ...

  • Page 3

    ... 350 kHz 85° 550 kHz 85° open RT = 180 kΩ (1% resistor to AGND 100 kΩ (1% resistor to AGND kΩ (1% resistor to AGND) TPS54380 MIN TYP MAX UNIT 3.0 6.0 6.2 9 8.4 12.8 1 1.4 2.95 3.0 2.70 2.80 0.14 0.16 2.5 2 ...

  • Page 4

    ... TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range unless otherwise noted PARAMETER ERROR AMPLIFIER Error amplifier open-loop voltage gain Error amplifier unity gain bandwidth Error amplifier common mode input voltage range Input bias current, VSENSE ...

  • Page 5

    ... AGND COMP 4 17 BOOT 5 16 THERMAL PAD DESCRIPTION DESCRIPTION ref TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 RT ENA TRACKIN VBIAS VIN VIN VIN PGND PGND PGND , otherwise PWRGD is low. 5 ...

  • Page 6

    ... Falling ENA Edge 1.2 V Deglitch Hysteresis: 0.03 V 2.5 µs VIN UVLO Comparator Falling and VIN Rising 2.95 V Edge Hysteresis: 0.16 V Deglitch I/O 2.5 µs TRACKIN Multiplexer Reference TPS54380 VSENSE 6 SHUTDOWN Thermal Comparator Leading Shutdown Edge 150°C Blanking 100 ns SS_DIS SHUTDOWN + R Q − S Error PWM Amplifier Comparator 25-ns Adaptive ...

  • Page 7

    ... A 1.75 −60 1.5 −80 1.25 −100 1 −120 0.75 −140 −160 0.5 −180 0.25 −200 TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 INTERNALLY SET OSCILLATOR FREQUENCY vs JUNCTION TEMPERATURE 750 650 550 450 350 250 − − Junction Temperature − °C J Figure 3 ...

  • Page 8

    ... The input voltage is a nominal 5 Vdc. The input filter 10-µF ceramic capacitor (Taiyo Yuden). C7, also a 10-µF ceramic capacitor (Taiyo Yuden), provides high-frequency decoupling of the TPS54380 from the input supply and must be located as close as possible to the device. Ripple current is carried in both C6 and C7, and the return path to PGND must avoid the current circulating in the output capacitors C8, C9, and C10 ...

  • Page 9

    ... VIN pins and the PGND pins. The TPS54380 has two internal grounds (analog and power). Inside the TPS54380, the analog ground ties to all of the noise-sensitive signals, while the power ground ties to the noisier power signals. Noise injected between the two grounds can degrade the performance of the TPS54380, particularly at higher output currents ...

  • Page 10

    ... RT ENA VSENSE COMP TRACKIN PWRGD VBIAS EXPOSED BOOT VIN VIN POWERPAD PH AREA VIN PH PGND PH PH PGND PH PGND PH TOPSIDE GROUND AREA VIA to Ground Plane Figure 10. TPS54380 PCB Layout OUTPUT VOLTAGE vs OUTPUT CURRENT 1.83 1. 1.79 1.78 1.77 0 0.5 1 1 − Output Current − A ...

  • Page 11

    ... ENABLE (ENA) The enable pin, ENA, provides a digital control enable or disable (shutdown) for the TPS54380. An input voltage of 1 greater ensures that the TPS54380 is enabled. An input of 0. less ensures that device operation is disabled. These are not standard logic thresholds, even though they are compatible with TTL outputs. ...

  • Page 12

    ... FET does not turn on. The low-side FET remains on until the VSENSE voltage decreases to a range that allows the PWM comparator to change states. The TPS54380 is capable of sinking current continuously until the output reaches the regulation set-point. If the current limit comparator trips for longer than 100 ns, the PWM latch resets before the PWM ramp exceeds the error amplifier output ...

  • Page 13

    ... When VIN ≥ UVLO threshold, ENA ≥ enable threshold, and VSENSE > 90 open-drain output of the PWRGD pin is high. A hysteresis voltage equal and a 35-µs falling edge ref deglitch circuit prevent tripping of the power-good comparator due to high-frequency noise. TPS54380 , the ref 13 ...

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  • Page 15

    ... TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold Customer on an annual basis. OTHER QUALIFIED VERSIONS OF TPS54380 : Automotive: TPS54380-Q1 • ...

  • Page 16

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing TPS54380PWPR HTSSOP PWP PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 20 2000 330.0 16.4 6.95 Pack Materials-Page 1 5-May-2011 Pin1 (mm) (mm) (mm) (mm) Quadrant 7.1 1.6 8.0 16.0 Q1 ...

  • Page 17

    ... Device Package Type TPS54380PWPR HTSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) PWP 20 2000 Pack Materials-Page 2 5-May-2011 Width (mm) Height (mm) 346.0 346.0 33.0 ...

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    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...