TPS51225

ACTIVO

Controlador reductor síncrono doble de 5.5 V a 24 V con LDO de 5 V y 3.3 V

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Hoja de datos

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

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TPS51225

ACTIVO

Hoja de datos

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Detalles del producto

Rating

Catalog

Topology

Buck

Iout (max) (A)

10

Vin (max) (V)

24

Vin (min) (V)

5.5

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) (%)

90

Iq (typ) (A)

0.0009

Number of phases

1

Operating temperature range (°C)

-40 to 85

Rating

Catalog

Topology

Buck

Iout (max) (A)

10

Vin (max) (V)

24

Vin (min) (V)

5.5

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) (%)

90

Iq (typ) (A)

0.0009

Number of phases

1

Operating temperature range (°C)

-40 to 85

WQFN (RUK)

20

9 mm² (3 mm × 3 mm)

Input Voltage Range: 5.5 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 300kHz/355kHz Frequency Setting
Auto-skip Light Load Operation (TPS51225/C)
OOA Light Load Operation (TPS51225B)
Internal 0.8-ms Voltage Servo Soft-Start
Low-Side R_DS(on)Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient
Built-in Output Discharge Function
Separate Enable Input for Switchers (TPS51225/B/C)
Dedicated OC Setting Terminals
Power Good Indicator
OVP/UVP/OCP Protection
Non-latch UVLO/OTP Protection
20-Pin, 3 mm × 3 mm, QFN (RUK)

Input Voltage Range: 5.5 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 300kHz/355kHz Frequency Setting
Auto-skip Light Load Operation (TPS51225/C)
OOA Light Load Operation (TPS51225B)
Internal 0.8-ms Voltage Servo Soft-Start
Low-Side R_DS(on)Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient
Built-in Output Discharge Function
Separate Enable Input for Switchers (TPS51225/B/C)
Dedicated OC Setting Terminals
Power Good Indicator
OVP/UVP/OCP Protection
Non-latch UVLO/OTP Protection
20-Pin, 3 mm × 3 mm, QFN (RUK)

The TPS51225/B/C 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 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 TPS51225/B/C 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 5.5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified from –40°C to 85°C.

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Documentación técnica

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Documentación principal	Tipo	Título	Fecha
*	Hoja de datos	Dual Synchronous Step-Down Controller with 5-V and 3.3-V LDOs datasheet (Rev. B)	9/09/2012
	Nota sobre la aplicación	Mosfet Driver Circuit Design Guide for TPS512xx (Rev. A)	1/04/2019
	Nota sobre la aplicación	Understanding Dead-time Based On TPS51225/275/285	22/08/2018
	Guía de selección	Power Management Guide 2018 (Rev. R)	25/06/2018

Diseño y desarrollo

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Placa de evaluación

TPS51225EVM-133 — Módulo de evaluación TPS51225

The Texas Instruments TPS51225EVM-133 evaluation module (EVM) helps designers evaluate the performance of the TPS51225 Dual Synchronous Step-Down Controller. The EVM provides 5V and 3.3V outputs and LDOs for a notebook system power supply application. The EVM also provides a 260kHz VCLK output, (...)

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