TPS51125A

Name: TPS51125A
Brand: TI
SKU: TPS51125A
Price: 1.155 USD

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4,5 V bis 28 V, Dual-Synchron-Abwärtsregler mit 100-mA-LDOs und flexiblen externen Komponenten

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Datenblatt

document-pdfAcrobat Dual-Synchronous, Step-Down Controller With OOA Operation and 100-mA LDOs datasheet (Rev. F) (Englisch)

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TPS51125A

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Datenblatt

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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, Synchronous Rectification

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, Synchronous Rectification

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/3.3-V LDO with Switches
Built-in 1% 2-V Reference Output
With/Without Out-of-Audio™ Mode Selectable Light Load and PWM only Operation
Internal 1.6-ms Voltage Servo Softstart
Adaptive On-Time Control Architecture with Four Selectable Frequency Setting
4500 ppm/°C R_DS(on) Current Sensing
Built-In Output Discharge
Power Good Output
Built-in OVP/UVP/OCP
Thermal Shutdown (Non-latch)
QFN24 (RGE)

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/3.3-V LDO with Switches
Built-in 1% 2-V Reference Output
With/Without Out-of-Audio™ Mode Selectable Light Load and PWM only Operation
Internal 1.6-ms Voltage Servo Softstart
Adaptive On-Time Control Architecture with Four Selectable Frequency Setting
4500 ppm/°C R_DS(on) Current Sensing
Built-In Output Discharge
Power Good Output
Built-in OVP/UVP/OCP
Thermal Shutdown (Non-latch)
QFN24 (RGE)

The TPS51125A is a cost effective, dual-synchronous buck controller targeted for notebook system power supply solutions. It 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, generating gate drive voltage for the load switches without reducing the main converter’s efficiency. The TPS51125A 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 TPS51125A is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.

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Alle anzeigen 2

	Typ	Titel		Datum
*	Data sheet	Dual-Synchronous, Step-Down Controller With OOA Operation and 100-mA LDOs datasheet (Rev. F)		10 Sep 2012
	User guide	TPS51125A Buck Controller Evaluation Module User's Guide (Rev. A)	PDF \| HTML	31 Jan 2022

Design und Entwicklung

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