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TPS40009DGQR

Low-VIN synchronous buck controller, 2.25-5.5V input, 600kHz, MSOP-10

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Manufacturer Part：

TPS40009DGQR

Package：

MSOP-10 (3.0 x 3.0 x 0.9 mm)

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Description

Product Overview

The TPS40009DGQR from Texas Instruments is a low-input-voltage synchronous buck controller designed for high-efficiency DC-DC conversion from input voltages as low as 2.25 V. Packaged in a 10-pin MSOP (DGS) package, it integrates a 600-kHz fixed-frequency voltage-mode controller with adaptive gate drivers for N-channel MOSFETs, targeting point-of-load applications.

Key Specifications

Input Voltage Range 2.25 V to 5.5 V
Output Voltage Range 0.7 V to 5.5 V
Switching Frequency 600 kHz fixed
Reference Voltage 0.7 V (1%)
Operating Temperature -40 to 85 degC
Package MSOP-10 (3.0 x 3.0 mm)

Features

  • Low VIN operation down to 2.25 V
  • 600-kHz fixed-frequency voltage-mode control
  • Adaptive anti-cross-conduction gate drive
  • Programmable current limit using MOSFET RDS(on) sensing
  • Internal soft-start with controlled inrush current
  • Power-good output indicator

Applications

  • Point-of-load DC-DC converters
  • Embedded processor core voltage regulation
  • DSP and FPGA power supplies
  • Low-voltage bus converters
  • Telecommunications and networking equipment

The TPS40009DGQR is a low-input-voltage synchronous buck controller from Texas Instruments designed for high-efficiency DC-DC conversion from input voltages as low as 2.25 V. It integrates a 600-kHz fixed-frequency voltage-mode PWM controller with adaptive gate drivers for external N-channel MOSFETs. The 0.7-V reference voltage with 1% accuracy supports low output voltages required by modern processors and FPGAs. The device features programmable current limit using MOSFET RDS(on) sensing, eliminating the need for an external current-sense resistor.

The TPS40009DGQR employs voltage-mode PWM control with a 600-kHz fixed-frequency oscillator. The error amplifier compares the divided output voltage against the 0.7-V reference and generates a control signal for the PWM comparator. The PWM modulator produces duty-cycle pulses that drive the high-side and low-side N-channel MOSFETs through adaptive gate drivers with anti-cross-conduction logic. Current limiting is achieved by sensing the voltage drop across the low-side MOSFET RDS(on) during the off-time. The internal soft-start gradually increases the reference voltage to limit inrush current during startup.

Pin Name Type Function
1 BST Power Bootstrap capacitor connection
2 SW Power Switch node
3 ILIM Input Current limit threshold set
4 COMP Output Error amplifier output / compensation
5 FB Input Feedback voltage input
6 SS Input Soft-start programming
7 PGOOD Output Power-good open-drain output
8 VDD Power Input supply voltage
9 LDRV Output Low-side gate drive
10 GND Power Ground
  • Point-of-load converters in computing platforms
  • Embedded processor core and I/O voltage regulation
  • DSP and FPGA low-voltage power supplies
  • Low-voltage bus converters in telecom equipment
  • Networking and storage system POL regulators
Manufacturer Part Number Package Notes
TI TPS40007DGQR MSOP-10 Lower switching frequency variant
TI TPS40011DGQR MSOP-10 Higher frequency option
TI TPS5430DDAR SOIC-8 3A integrated buck, wider VIN
TI TPS5450DDAR SOIC-8 5A integrated buck converter
Monolithic Power MP2105DK-LF QFN-10 Similar buck controller
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Contact Information

Email: info@ic-vendor.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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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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