TPS54973

Name: TPS54973
Brand: TI
SKU: TPS54973
Price: 3.333 USD

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3.3V Input, 9A Synchronous Step-Down Converter for Prebiased Outputs

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Data sheet

document-pdfAcrobat 3-V to 4-V Input 9-A Output Synchronous Buck Switcher datasheet (Rev. A)

TPS54973

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Data sheet

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Product details

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Topology

Buck

Type

Converter

Iout (max) (A)

9

Vin (min) (V)

3

Vin (max) (V)

4

Switching frequency (min) (kHz)

280

Switching frequency (max) (kHz)

700

Features

Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification

Control mode

Voltage mode

Vout (min) (V)

0.9

Vout (max) (V)

2.5

Iq (typ) (µA)

11000

Duty cycle (max) (%)

90

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Topology

Buck

Type

Converter

Iout (max) (A)

9

Vin (min) (V)

3

Vin (max) (V)

4

Switching frequency (min) (kHz)

280

Switching frequency (max) (kHz)

700

Features

Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification

Control mode

Voltage mode

Vout (min) (V)

0.9

Vout (max) (V)

2.5

Iq (typ) (µA)

11000

Duty cycle (max) (%)

90

HTSSOP (PWP)

28

62.08 mm² 9.7 x 6.4

15-m MOSFET Switches for High Efficiency at 9-A Continuous Output Source or Sink Current
Disabled Current Sinking During Start-Up
0.9-V to 2.5-V Adjustable Output Voltage Range With 1.0% Accuracy
Wide PWM Frequency:
Fixed 350 kHz, 550 kHz or
Adjustable 280 kHz to 700 kHz
Synchronizable to 700 kHz
Load Protected by Peak Current Limit and Thermal Shutdown
Integrated Solution Reduces Board Area and Component Count
APPLICATIONS
- Low-Voltage, High-Density Distributed Power Systems
- Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
- Broadband, Networking and Optical Communications Infrastructure
- Power PC Series Processors

PowerPAD and SWIFT are trademarks of Texas Instruments.

15-m MOSFET Switches for High Efficiency at 9-A Continuous Output Source or Sink Current
Disabled Current Sinking During Start-Up
0.9-V to 2.5-V Adjustable Output Voltage Range With 1.0% Accuracy
Wide PWM Frequency:
Fixed 350 kHz, 550 kHz or
Adjustable 280 kHz to 700 kHz
Synchronizable to 700 kHz
Load Protected by Peak Current Limit and Thermal Shutdown
Integrated Solution Reduces Board Area and Component Count
APPLICATIONS
- Low-Voltage, High-Density Distributed Power Systems
- Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
- Broadband, Networking and Optical Communications Infrastructure
- Power PC Series Processors

PowerPAD and SWIFT are trademarks of Texas Instruments.

As a member of the SWIFT™ family of dc/dc regulators, the TPS54973 low-input voltage high-output current synchronous buck PWM converter integrates all required active components. 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 in-rush currents; and a power good output useful for processor/logic reset, fault signaling, and supply sequencing.

For reliable power up in output precharge applications, the TPS54973 is designed to only source current during startup.

The TPS54973 is available in a thermally enhanced 28-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.

As a member of the SWIFT™ family of dc/dc regulators, the TPS54973 low-input voltage high-output current synchronous buck PWM converter integrates all required active components. 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 in-rush currents; and a power good output useful for processor/logic reset, fault signaling, and supply sequencing.

For reliable power up in output precharge applications, the TPS54973 is designed to only source current during startup.

The TPS54973 is available in a thermally enhanced 28-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.

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