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TPS53315RGFT

12A Buck Conv, Int MOSFET, D-CAP, 3-15Vin, VQFN-40

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Manufacturer Part：

TPS53315RGFT

Package：

VQFN-40 (7.0 x 5.0 x 1.0 mm, 0.5mm pitch)

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Description

Product Overview

The TPS53315RGFT from Texas Instruments is a 12A synchronous step-down converter with integrated MOSFETs, D-CAP control, 3-15V input, and 40-pin VQFN package.

Key Specifications

Type 12A Synchronous Step-Down Converter with Integrated MOSFETs
Input Voltage (Conversion) 3V to 15V
VDD Supply Voltage 4.5V to 25V
Output Voltage 0.6V to 5.5V (adjustable)
Output Current 12A (continuous)
Switching Frequency 250 kHz to 1 MHz (resistor programmable)
Control Mode D-CAP (Direct Control with Adaptive On-Time)
High-Side FET RDS(ON) 19 mOhm (integrated)
Low-Side FET RDS(ON) 7 mOhm (integrated)
Reference Voltage 0.6V, 1% accuracy
Quiescent Current 320 uA (typical)
Shutdown Current Less than 10 uA
Max Duty Cycle 90%
Efficiency Up to 96%
Package VQFN-40 (RGF, 7 x 5 mm)
Operating Temperature -40C to +85C

Features

  • Integrated 19mOhm/7mOhm power MOSFETs
  • D-CAP mode for fast transient response
  • Auto-skip Eco-mode for light-load efficiency
  • Selectable switching frequency via external resistor
  • Internal soft-start with selectable durations (0.7/1.4/2.8/5.6ms)
  • Pre-charged start-up (prebias) capability
  • Adjustable overcurrent limit via external resistor
  • 5V LDO output for gate drive
  • Integrated boost switch
  • OVP, UVP, UVLO, and over-temperature protection
  • Open-drain power-good output
  • Supports all-ceramic output capacitors

Applications

  • Point-of-load power supplies
  • Embedded computing systems
  • Telecom and networking equipment
  • High-current POL regulation

The TPS53315RGFT from Texas Instruments is a 12A synchronous step-down converter with integrated power MOSFETs in a compact 7x5mm VQFN-40 package. The device integrates a 19mOhm high-side and 7mOhm low-side MOSFET, providing high-efficiency power conversion up to 96% from a 3V to 15V input rail. The D-CAP control mode enables fast transient response with no external compensation network required, simplifying design. The switching frequency is programmable from 250kHz to 1MHz via a single external resistor, allowing optimization for efficiency or size. The Auto-Skip Eco-mode reduces switching frequency at light loads to maintain high efficiency, while forced continuous conduction mode is also selectable via the MODE pin. The 0.6V reference with 1% accuracy ensures precise output voltage regulation. The integrated boost switch eliminates the need for an external boot diode. The device features internal soft-start with four selectable durations, prebias startup capability, and comprehensive protection including adjustable overcurrent limit, over-voltage, under-voltage, UVLO, and over-temperature shutdown.

The TPS53315RGFT uses TI’s D-CAP (Direct Control with Adaptive On-Time) control mode, which is a constant on-time architecture with adaptive on-time adjustment to maintain a pseudo-fixed switching frequency. When the output voltage drops below the reference, the controller triggers an on-time pulse whose duration is proportional to VOUT/VIN, maintaining the target frequency. The low-side MOSFET is turned on during the off-time, creating a synchronous buck converter. The D-CAP mode provides inherently fast transient response because there is no error amplifier compensation network to limit the bandwidth; the output voltage ripple provides the feedback signal directly. In Auto-Skip Eco-mode, when the inductor current reaches zero at light loads, the low-side MOSFET is turned off to prevent negative inductor current (discontinuous conduction mode). The switching frequency then decreases proportionally with load current, reducing switching losses. The adaptive zero-crossing circuit optimizes the low-side FET turn-off timing to minimize body diode conduction. The overcurrent limit is set by an external resistor on the ILIMIT pin, which programs a reference voltage for the current sense comparator. When the voltage across the low-side MOSFET exceeds this threshold during the off-time, the controller skips on-time pulses to limit the output current.

Pin Group Name Type Function
Power VIN Power Conversion input voltage (3-15V)
Power VDD Power Supply voltage (4.5-25V)
Power SW Output Switch node (inductor connection)
Power GND, PGND Power Ground connections
Control VOUT/FB Input Output voltage feedback (0.6V ref)
Control EN Input Enable (HIGH=on)
Control MODE Input Mode select (skip/PWM/forced CCM)
Control SS Input Soft-start time selection
Control FREQ Input Switching frequency programming resistor
Control ILIMIT Input Overcurrent limit programming resistor
Control PGOOD Output Power-good (open-drain)
Bootstrap BST I/O Boost capacitor for high-side driver
Bias VREG5 Output 5V LDO output for gate drive
  • 12V to 1.2V FPGA core power at 12A with D-CAP fast transient and 96% peak efficiency
  • 5V to 3.3V POL with Auto-Skip Eco-mode for idle-power-sensitive embedded computing
  • 12V to 1.8V DDR3 VDDQ at 10A with 500kHz switching and all-ceramic output capacitors
Manufacturer Part Number Package Notes
TI TPS53319RGFT VQFN-40 18A, higher current version
TI TPS53316RGFT VQFN-40 6A, lower current version
Monolithic Power MP8765GLT-P QFN-32 12A, integrated FET, similar
Infineon IR3899MTRPBF PQFN-35 12A, integrated FET buck
TI TPS54560BDDA HSOIC-8 5A, controller only, external FET
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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