Texas Instruments TPS40200DR – High-Performance Buck Switching Controller

The TPS40200DR from Texas Instruments is a versatile, efficient buck controller well-suited for industrial, automotive, and consumer power supplies. With its wide input range, adjustable output, and robust SOIC-8 packaging, it simplifies high-performance DC-DC conversion while maintaining TI's hallmark reliability.

The Texas Instruments TPS40200DR is an advanced buck (step-down) switching controller designed to deliver high-efficiency power conversion in industrial, automotive, and consumer applications. Supporting an input voltage range of 4.5V to 52V and adjustable output voltage from 0.7V to 46V, this voltage-mode PWM controller integrates soft-start, frequency control, and wide input voltage compatibility, making it ideal for DC-DC power supply designs requiring flexibility and reliability. With a switching frequency range of 35kHz to 500kHz, the TPS40200DR enables optimized efficiency and compact magnetics, while its 3A peak output current ensures robust performance in demanding applications. Packaged in an SOIC-8 (DR) surface-mount format, this controller is RoHS3-compliant and offers industrial-grade temperature resistance (-40°C to +85°C).

Key Features

Wide Input Voltage Range (4.5V – 52V) – Supports 12V/24V/48V systems Adjustable Output (0.7V – 46V) – Precision regulation for diverse loads 500kHz Maximum Switching Frequency – Reduces inductor/capacitor size Voltage-Mode PWM Control – Stable, noise-resistant operation Integrated Soft-Start – Prevents inrush current surges Up to 95% Duty Cycle – Maximizes efficiency in step-down applications Low Quiescent Current (1.5mA) – Optimized for energy-sensitive designs 3A Peak Output Current – Suitable for moderate-power loads RoHS3 & Lead-Free Compliance – Environmentally friendly

Technical Specifications

Electrical Characteristics

Parameter	Value
Input Voltage Range	4.5V to 52V
Output Voltage	0.7V to 46V (adjustable)
Max Output Current	3A (transistor driver output)
Switching Frequency	35kHz to 500kHz (programmable)
Duty Cycle (Max)	95%
Control Mode	Voltage-Mode PWM
Soft-Start Time	Adjustable via external capacitor
Quiescent Current	1.5mA (typical)
Operating Temperature	-40°C to +85°C

Package & Compliance

Attribute	Details
Package Type	SOIC-8 (DR) Surface-Mount
Dimensions	4.9mm x 3.91mm x 1.75mm
Mounting Style	SMD (SMT-compatible)
Lead Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
RoHS Status	RoHS3 Compliant
ECCN Code	EAR99 (Export-restriction-free)

Applications

The TPS40200DR excels in DC-DC power conversion for industrial, automotive, and consumer electronics including:

1. Industrial Power Systems

• Factory automation controllers
• PLC (Programmable Logic Controller) power supplies
• Motor drive auxiliary power

2. Automotive & Transportation

• Infotainment systems (12V/24V input)
• ECU (Engine Control Unit) power management
• LED driver modules

3. Consumer Electronics

• Set-top boxes & networking equipment
• Portable battery-powered devices
• High-power USB-C PD adapters (supports PD negotiation via PMIC)

4. Renewable Energy & Telecom

• Solar microinverters (48V step-down conversion)
• Telecom base station backup power

Key Features

1. Wide Input Voltage Compatibility (4.5V – 52V)

• Supports 12V/24V/48V bus systems without requiring additional pre-regulation stages.
• Ideal for battery-powered systems (e.g., 12V automotive, 48V industrial backup).

2. Adjustable Output Voltage (0.7V to 46V)

• Uses external resistor divider for precise voltage regulation.
• Ideal for low-voltage microcontrollers, FPGAs, and ASICs.

3. Programmable Switching Frequency (35kHz – 500kHz)

• Higher frequencies (300kHz – 500kHz) allow smaller inductors/capacitors.
• Lower frequencies (35kHz – 100kHz) improve efficiency in high-power designs.

4. Built-in Protection & Control Features

• Soft-start circuitry prevents inrush current.
• Frequency control reduces EMI sensitivity.
• Non-synchronous buck topology for cost-effective designs.

5. Compact & Reliable Packaging

• SOIC-8 (DR) package optimizes PCB space.
• Industrial temperature rating (-40°C to +85°C) ensures reliability.

Comparison with Alternative Models

TPS40200 Family Overview

TPS40200DR comparison with alternative parts

Part Number	Status	Packaging	Output Current	Max Duty Cycle	Key Distinction
TPS40200DR	Active	Tape & Reel (TR)	3A	95%	Standard variant, best balance of cost & performance
TPS40200HD	Active	Tube	3A	98%	Higher-duty-cycle option (98%) for extreme step-down ratios
TPS40200GDR	Active	Tape & Reel (TR)	2.5A	95%	Optimized for general-purpose applications
TPS40200DG4	Active	Tube	2.5A	95%	Similar to GDR but in tube packaging

Selection Guide:

• For high-power applications, choose the TPS40200HD (98% duty cycle).
• For automated SMD assembly, use TPS40200DR (T&R packaging).

About Texas Instruments

Texas Instruments (TI) is a global leader in analog and embedded semiconductor technology, providing cutting-edge power management ICs, DSPs, and microcontrollers. The company's expertise in DC-DC switching controllers ensures the TPS40200DR delivers reliable performance backed by decades of innovation. TI's acquisition of National Semiconductor and continuous advancements in power electronics have solidified its position as the top choice for engineers designing efficient, compact power systems.