Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)
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AC/DC- und DC/DC-Controller (externer FET)

TPS51125

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4,5-V- bis 28-V-Zweikanal-Synchron-Abwärts-Controller mit 100-mA-LDOs und Out-of-Audio™

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Ähnliche Funktionalität wie verglichener Baustein
TPS51397A AKTIV Synchroner Abwärtswandler für Eingangsspannungen von 4,5 V bis 24 V, 10 A Offers a lower IQ and is soft start adjustable with an extended positive operating temperature range in a smaller package.

TPS51125

AKTIV
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Produktdetails

Vin (min) (V) 5.5 Vin (max) (V) 28 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode D-CAP Topology Buck Rating Catalog Vout (min) (V) 2 Vout (max) (V) 5.5 Features Enable, Light Load Efficiency, Power good Iq (typ) (µA) 550 Duty cycle (max) (%) 93 Number of phases 1
Vin (min) (V) 5.5 Vin (max) (V) 28 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode D-CAP Topology Buck Rating Catalog Vout (min) (V) 2 Vout (max) (V) 5.5 Features Enable, Light Load Efficiency, Power good Iq (typ) (µA) 550 Duty cycle (max) (%) 93 Number of phases 1
VQFN (RGE) 24 16 mm² 4 x 4
  • Wide Input Voltage Range: 5.5 V to 28 V
  • Output Voltage Range: 2 V to 5.5 V
  • Built-In 100-mA, 5-V and 3.3-V LDO With Switches
  • Built-In 1% 2-V Reference Output
  • With or Without Out-of-Audio™ Mode Selectable
    Light-Load and PWM-Only Operation
  • Internal 1.6-ms Voltage Servo Soft-Start
  • Adaptive On-Time Control Architecture With Four
    Selectable Frequency Setting
  • 4500 ppm/\xC2°C RDS(on) Current Sensing
  • Built-In Output Discharge
  • Powergood Output
  • Built-In OVP/UVP/OCP
  • Thermal Shutdown (Nonlatch)
  • QFN, 24-Pin (RGE)
  • APPLICATIONS
    • Notebook Computers
    • I/O Supplies
    • System Power Supplies

All other trademarks are the property of their respective owners
  • Wide Input Voltage Range: 5.5 V to 28 V
  • Output Voltage Range: 2 V to 5.5 V
  • Built-In 100-mA, 5-V and 3.3-V LDO With Switches
  • Built-In 1% 2-V Reference Output
  • With or Without Out-of-Audio™ Mode Selectable
    Light-Load and PWM-Only Operation
  • Internal 1.6-ms Voltage Servo Soft-Start
  • Adaptive On-Time Control Architecture With Four
    Selectable Frequency Setting
  • 4500 ppm/\xC2°C RDS(on) Current Sensing
  • Built-In Output Discharge
  • Powergood Output
  • Built-In OVP/UVP/OCP
  • Thermal Shutdown (Nonlatch)
  • QFN, 24-Pin (RGE)
  • APPLICATIONS
    • Notebook Computers
    • I/O Supplies
    • System Power Supplies

All other trademarks are the property of their respective owners

The TPS51125 is a cost-effective, dual-synchronous buck controller targeted for notebook system power supply solutions. The device provides 5-V and 3.3-V LDOs and requires few external components. The 270-kHz VCLK output can be used to drive an external charge pump, thus generating gate drive voltage for the load switches without reducing the efficiency of the main converter. The TPS51125 supports high-efficiency, fast-transient response and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAP control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51125 is available in a 24-pin QFN package and is specified from –40°C to 85°C ambient temperature range.

The TPS51125 is a cost-effective, dual-synchronous buck controller targeted for notebook system power supply solutions. The device provides 5-V and 3.3-V LDOs and requires few external components. The 270-kHz VCLK output can be used to drive an external charge pump, thus generating gate drive voltage for the load switches without reducing the efficiency of the main converter. The TPS51125 supports high-efficiency, fast-transient response and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAP control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51125 is available in a 24-pin QFN package and is specified from –40°C to 85°C ambient temperature range.
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Technische Dokumentation

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* Data sheet TPS51125 Dual-Synchronous, Step-Down Controller With Out-of-Audio™ Operation and 100-mA LDOS for Notebook System Power datasheet (Rev. H) PDF | HTML 05 Jan 2015
Application note Intel Core i3, i5, i7 [Arrandale] Reference Design 21 Jul 2010

Design und Entwicklung

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TPS51125 TINA-TI Average Reference Design

SLUM346.TSC (764 KB) - TINA-TI Reference Design
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TPS51125 TINA-TI Average Spice Model

SLUM345.ZIP (4 KB) - TINA-TI Spice Model
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TPS51125 Unencrypted PSpice Average Model Package (Rev. B)

SLIM147B.ZIP (73 KB) - PSpice Model
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TPS51125 Unencrypted PSpice Transient Model Package (Rev. B)

SLIM134B.ZIP (52 KB) - PSpice Model
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VQFN (RGE) 24 Ultra Librarian
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