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

TPS54380-Q1

Manufacturer Part NumberTPS54380-Q1
DescriptionAs 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
ManufacturerTexas Instruments
TPS54380-Q1 datasheet
 


Specifications of TPS54380-Q1

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)700Switching Frequency(typ)(khz)350
Switch Current Limit(typ)(a)4TopologyBuck
Operating Temperature Range(c)-40 to 125Pin/package20HTSSOP
Duty Cycle(max)(%)90Regulated 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
Qualified for Automotive Applications
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-Q1
SLVS836 − JUNE 2008
START-UP WAVEFORM
= 1 Ω
R
L
VI/O = 3.3 V
Vcore = 1.8 V
1 ms/div
Copyright  2008, Texas Instruments Incorporated

TPS54380-Q1 Summary of contents

  • Page 1

    ... 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-Q1 SLVS836 − JUNE 2008 START-UP WAVEFORM = 1 Ω VI/O = 3.3 V Vcore = 1 ms/div Copyright  ...

  • Page 2

    ... TPS54380-Q1 SLVS836 − JUNE 2008 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. (1) ORDERING INFORMATION T J −40°C to 125°C HTSSOP − PW (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at http://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-Q1 SLVS836 − JUNE 2008 MIN TYP MAX UNIT 3.0 6.0 6.2 9 8.4 12.8 1 1.4 2.95 3 ...

  • Page 4

    ... TPS54380-Q1 SLVS836 − JUNE 2008 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 Output voltage slew rate (symmetric), ...

  • Page 5

    ... PWP PACKAGE (TOP VIEW) AGND COMP BOOT THERMAL PAD DESCRIPTION DESCRIPTION ref TPS54380-Q1 SLVS836 − JUNE 2008 RT ENA TRACKIN VBIAS VIN VIN VIN PGND PGND PGND , otherwise PWRGD is low. 5 ...

  • Page 6

    ... TPS54380-Q1 SLVS836 − JUNE 2008 INTERNAL BLOCK DIAGRAM Enable Comparator 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 Deglitch Hysteresis: 0.16 V I/O 2.5 µs TRACKIN Multiplexer Reference TPS54380 VSENSE 6 SHUTDOWN Comparator Thermal Leading Shutdown Edge 150°C Blanking ...

  • 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-Q1 SLVS836 − JUNE 2008 INTERNALLY SET OSCILLATOR FREQUENCY vs JUNCTION TEMPERATURE 750 650 550 450 350 250 − − Junction Temperature − ° Figure 3 OUTPUT VOLTAGE REGULATION ...

  • Page 8

    ... TPS54380-Q1 SLVS836 − JUNE 2008 Figure 9 shows the schematic diagram for a typical TPS54380 application. The TPS54380 (U1) can provide greater than output current at a nominal output voltage of 1.8 V. For proper thermal performance, the exposed thermal PowerPAD underneath the integrated circuit package must be soldered to the printed-circuit ...

  • Page 9

    ... The size of the vias under the package, but not in the exposed thermal pad area, can be increased to 0.018. Additional vias beyond the twelve recommended that enhance thermal performance must be included in areas not under the device package. TPS54380-Q1 SLVS836 − JUNE 2008 copper is 9 ...

  • Page 10

    ... TPS54380-Q1 SLVS836 − JUNE 2008 COMPENSATION NETWORK BOOT CAPACITOR VOUT OUTPUT INDUCTOR OUTPUT FILTER CAPACITOR PERFORMANCE GRAPHS EFFICIENCY vs OUTPUT CURRENT 100 3 0.5 1 1.5 2 2.5 3 3.5 I − Output Current − Figure 11 10 ANALOG GROUND TRACE ...

  • Page 11

    ... Safe Operating Area − Load Current − Figure 15 START-UP TIMING V I/O ~Enable V I/O Vcore 2 ms/div Figure 18 TPS54380-Q1 SLVS836 − JUNE 2008 OUTPUT RIPPLE VOLTAGE Time − 1 µs/div Figure 16 POWER-DOWN TIMING V I/O ~Enable V I/O Vcore 2 ms/div Figure 19 11 ...

  • Page 12

    ... TPS54380-Q1 SLVS836 − JUNE 2008 DETAILED DESCRIPTION UNDERVOLTAGE LOCKOUT (UVLO) The TPS54380 incorporates an undervoltage lockout circuit to keep the device disabled when the input voltage (VIN) is insufficient. During power up, internal circuits are held inactive until VIN exceeds the nominal UVLO threshold voltage of 2.95 V. Once the UVLO start threshold is reached, device start-up begins ...

  • 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-Q1 SLVS836 − JUNE 2008 , the ref 13 ...

  • Page 14

    ... 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-Q1 : Catalog: TPS54380 • ...

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  • Page 18

    ... 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’ ...