IC SYNC BUCK PWM CONV 20-HTSSOP

TPS54380PWPG4

Manufacturer Part NumberTPS54380PWPG4
DescriptionIC SYNC BUCK PWM CONV 20-HTSSOP
ManufacturerTexas Instruments
SeriesSWIFT™
TypeStep-Down (Buck)
TPS54380PWPG4 datasheet
 


Specifications of TPS54380PWPG4

Internal Switch(s)YesSynchronous RectifierYes
Number Of Outputs1Voltage - Output0.9 ~ 3.3 V
Current - Output3AFrequency - Switching350kHz
Voltage - Input3 ~ 6 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
Power - Output1.73WTopologyBuck
Output Voltage4.5 VOutput Current3 A
Input Voltage6 VDuty Cycle (max)90 %
Switching Frequency700 KHzMaximum Operating Temperature+ 85 C
Mounting StyleSMD/SMTMinimum Operating Temperature- 40 C
For Use With296-18965 - EVAL MODULE FOR TPS54380-001Lead Free Status / RoHS StatusLead free / RoHS Compliant
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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

TPS54380PWPG4 Summary of contents

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    ... 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 ...

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    TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 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 ...

  • Page 3

    ELECTRICAL CHARACTERISTICS over operating free-air temperature range unless otherwise noted PARAMETER SUPPLY VOLTAGE, VIN Input voltage range, VIN I I Quiescent current Quiescent current (Q) UNDERVOLTAGE LOCKOUT Start threshold voltage, UVLO Stop threshold voltage, UVLO Hysteresis voltage, UVLO Rising ...

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    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 ...

  • Page 5

    VSENSE PWRGD TERMINAL FUNCTIONS TERMINAL NAME NO. AGND 1 Analog ground. Return for compensation network/output divider, slow-start capacitor, VBIAS capacitor, RT resistor. Connect PowerPAD to AGND. BOOT 5 Bootstrap output. 0.022-µF to 0.1-µF low-ESR capacitor connected from BOOT to ...

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    TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 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 Hysteresis: 0.16 V Deglitch I/O ...

  • Page 7

    DRAIN-SOURCE ON-STATE RESISTANCE vs JUNCTION TEMPERATURE 120 100 − 125 T − Junction Temperature − °C J Figure 1 EXTERNALLY SET ...

  • Page 8

    TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 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. ...

  • Page 9

    An additional high-frequency bypass capacitor, C12, is also used. The feedback loop is compensated so that the unity gain frequency is approximately 50 kHz. PCB LAYOUT Figure 10 shows a generalized PCB layout guide for the TPS54380. The VIN ...

  • Page 10

    TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 COMPENSATION NETWORK BOOT CAPACITOR VOUT OUTPUT INDUCTOR OUTPUT FILTER CAPACITOR PERFORMANCE GRAPHS EFFICIENCY vs OUTPUT CURRENT 100 3 ...

  • Page 11

    MEASURED LOOP RESPONSE 60 180 50 Phase 150 40 120 Gain 0 0 −10 −30 −20 −60 −30 −90 −40 −120 −50 −150 −60 −180 100 100 k 1 ...

  • Page 12

    TPS54380 SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005 VBIAS REGULATOR (VBIAS) The VBIAS regulator provides internal analog and digital blocks with a stable supply voltage over variations in junction temperature and input voltage. A high quality, low-ESR, ceramic bypass ...

  • Page 13

    OVERCURRENT PROTECTION The cycle-by-cycle current limiting is achieved by sensing the current flowing through the high-side MOSFET and comparing this signal to a preset overcurrent threshold. The high-side MOSFET is turned off within 200 ns of reaching the current ...

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    ... PACKAGING INFORMATION (1) Orderable Device Status TPS54380PWP ACTIVE TPS54380PWPG4 ACTIVE TPS54380PWPR ACTIVE TPS54380PWPRG4 ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. ...

  • 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 (mm) Diameter Width (mm) W1 (mm) 20 2000 330.0 16.4 6.95 Pack Materials-Page 1 11-Mar-2008 ...

  • Page 17

    Device Package Type TPS54380PWPR HTSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) PWP 20 2000 Pack Materials-Page 2 11-Mar-2008 Width (mm) Height (mm) 346.0 346.0 33.0 ...

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  • Page 21

    ... 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’ ...