IC SYNC BUCK PWM SWITCH 20HTSSOP

TPS54380QPWPRQ1

Manufacturer Part NumberTPS54380QPWPRQ1
DescriptionIC SYNC BUCK PWM SWITCH 20HTSSOP
ManufacturerTexas Instruments
SeriesSWIFT™
TypeStep-Down (Buck)
TPS54380QPWPRQ1 datasheet
 


Specifications of TPS54380QPWPRQ1

Internal Switch(s)YesSynchronous RectifierYes
Number Of Outputs1Voltage - Output0.9 ~ 4.5 V
Current - Output3AFrequency - Switching350kHz
Voltage - Input3 ~ 6 VOperating Temperature-40°C ~ 125°C
Mounting TypeSurface MountPackage / Case20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
Power - Output1.73WFor Use With296-18965 - EVAL MODULE FOR TPS54380-001
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names296-23865-2
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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

TPS54380QPWPRQ1 Summary of contents

  • Page 1

    ... 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 ...

  • Page 2

    ... PCB 4. 10 thermal vias (see “Recommended Land Pattern” in applications section of this data sheet) (3) Maximum power dissipation may be limited by overcurrent protection. 2 (2) PACKAGE ORDERABLE PART NUMBER Reel of 2000 TPS54380QPWPRQ1 (1) VIN, ENA RT VSENSE, TRACKIN BOOT VBIAS, COMP, PWRGD PH PH ...

  • 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 ...

  • 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 ...

  • 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 ...

  • 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 ...

  • Page 7

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

  • 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, ...

  • Page 9

    OUTPUT FILTER The output filter is composed of a 1-µH inductor and 3 x 22-µF capacitor. The inductor is a low dc resistance (0.010 Ω) type, Vishay 1HLP2525CZ01. The capacitors used are 22-µF, 6.3-V ceramic types with X5R dielectric. ...

  • 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 ...

  • Page 11

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

  • Page 12

    TPS54380-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 ...

  • Page 13

    During transient conditions, the error amplifier output could be below the PWM ramp valley voltage or above the PWM peak voltage. If the error amplifier is high, the PWM latch is never reset, and the high-side FET remains on ...

  • Page 14

    ... PACKAGING INFORMATION (1) Orderable Device Status TPS54380QPWPRQ1 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. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design ...

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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’ ...