TPS51275B

AKTIV

5,5-V- bis 24-V-Dual-Synchron-Buck-Controller mit Out-of-Audio™-Modus

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Datenblatt

document-pdfAcrobat Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs datasheet (Rev. B) (Englisch)

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TPS51275B

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Catalog

Topology

Buck

Iout (max) (A)

20

Vin (max) (V)

24

Vin (min) (V)

5

Vout (max) (V)

5.5

Vout (min) (V)

4.5

Control mode

D-CAP

Features

Enable, Light-load efficiency, Power good, Synchronous rectification

Duty cycle (max) (%)

95

Iq (typ) (A)

0.0008

Number of phases

1

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Topology

Buck

Iout (max) (A)

20

Vin (max) (V)

24

Vin (min) (V)

5

Vout (max) (V)

5.5

Vout (min) (V)

4.5

Control mode

D-CAP

Features

Enable, Light-load efficiency, Power good, Synchronous rectification

Duty cycle (max) (%)

95

Iq (typ) (A)

0.0008

Number of phases

1

Operating temperature range (°C)

-40 to 125

WQFN (RUK)

20

9 mm² (3 mm × 3 mm)

Input Voltage Range: 5 V to 24 V
Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
Built-in, 100-mA, 5-V and 3.3-V LDOs
Clock Output for Charge-Pump
±1% Reference Accuracy
Adaptive On-Time D-CAP Mode Control Architecture with 300-kHz and 355-kHz Frequency Setting
Auto-skip Light Load Operation (TPS51275, and TPS51275C)
OOA Light Load Operation (TPS51275B)
Internal 0.8-ms Voltage Servo Soft-Start
Low-Side R_DS(on)Current Sensing Scheme
Built-In Output Discharge Function
Separate Enable Input for Switchers
Dedicated OC Setting Terminals
Power Good Indicator
OVP, UVP and OCP Protection
Non-Latch UVLO and OTP Protection
20-Pin, 3 mm x 3 mm, QFN (RUK)

Input Voltage Range: 5 V to 24 V
Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
Built-in, 100-mA, 5-V and 3.3-V LDOs
Clock Output for Charge-Pump
±1% Reference Accuracy
Adaptive On-Time D-CAP Mode Control Architecture with 300-kHz and 355-kHz Frequency Setting
Auto-skip Light Load Operation (TPS51275, and TPS51275C)
OOA Light Load Operation (TPS51275B)
Internal 0.8-ms Voltage Servo Soft-Start
Low-Side R_DS(on)Current Sensing Scheme
Built-In Output Discharge Function
Separate Enable Input for Switchers
Dedicated OC Setting Terminals
Power Good Indicator
OVP, UVP and OCP Protection
Non-Latch UVLO and OTP Protection
20-Pin, 3 mm x 3 mm, QFN (RUK)

The TPS51275, TPS51275B and TPS51275C are cost-effective, dual-synchronous buck controllers targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 260-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 efficiency. The TPS51275, TPS51275B and TPS51275C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51275, TPS51275B and TPS51275C are available in a 20-pin, 3 mm x 3 mm, QFN package and is specified from –40°C to 85°C.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Neueste englische Version herunterladen	Datum
*	Datenblatt	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs datasheet (Rev. B)			27.02.2013
	Anwendungshinweis	Mosfet Driver Circuit Design Guide for TPS512xx (Rev. A)			01.04.2019

Design und Entwicklung

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