Overview
The TPS40190DRCTG4 is a synchronous buck controller produced by Texas Instruments. This component is designed to operate within an input voltage range of 4.5 V to 15 V, making it versatile for various power supply applications. It features a fixed switching frequency of 300 kHz and implements voltage-mode control, which is essential for maintaining stable output voltage. The controller includes an internal 5-V regulator for housekeeping, driver power, and supporting light external loads. The TPS40190DRCTG4 is packaged in a small 3 mm × 3 mm, 10-pin SON package, contributing to a reduced overall converter footprint.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 15.0 | V |
| Feedback Voltage Range | 582 | 591 | 597 | mV |
| Switching Frequency | 240 | 300 | 360 | kHz |
| Maximum Duty Cycle | - | - | 85% | - |
| High-Side Driver Pull-Up Resistance | 3 | - | 6 | Ω |
| Low-Side Driver Pull-Up Resistance | 2.5 | - | 5 | Ω |
| Soft-Start Time | 3.0 | 4.7 | 7.0 | ms |
| UnderVoltage Lockout (UVLO) Turn-On Voltage | 4.1 | - | 4.4 | V |
Key Features
- Voltage Mode Control: The TPS40190DRCTG4 uses voltage-mode control to regulate the output voltage.
- Internal 5-V Regulator: Provides power for internal housekeeping, driver power, and light external loads.
- Adaptive Anti-Cross Conduction: Prevents both the high-side and rectifier MOSFETs from being turned on simultaneously, reducing shoot-through current.
- Selectable Short-Circuit Protection Thresholds: User-selectable thresholds set via an external resistor.
- Pre-Bias Output Safe: Supports pre-biased outputs to protect sensitive loads during start-up.
- Bootstrapped Drivers: For N-channel MOSFETs, reducing switching losses and heat buildup.
- Internal Soft Start: Reduces inrush current and minimizes stress on the power stage during start-up.
- Small Package Size: 3 mm × 3 mm, 10-pin SON package, reducing overall converter footprint.
Applications
- Cable Modem CPE: Suitable for cable modem customer premises equipment due to its efficient power management.
- Digital Set Top Box: Used in digital set-top boxes for reliable and efficient power supply.
- Graphics/Audio Cards: Ideal for graphics and audio cards requiring stable and efficient power supply.
- Entry-Level and Mid-Range Servers: Applicable in entry-level and mid-range server systems for cost-effective power management.
Q & A
- What is the input voltage range of the TPS40190DRCTG4?
The input voltage range is from 4.5 V to 15 V.
- What is the switching frequency of the TPS40190DRCTG4?
The switching frequency is fixed at 300 kHz.
- What type of control does the TPS40190DRCTG4 use?
The TPS40190DRCTG4 uses voltage-mode control.
- Does the TPS40190DRCTG4 have internal short-circuit protection?
Yes, it has selectable short-circuit protection thresholds set via an external resistor.
- What is the purpose of the internal 5-V regulator?
The internal 5-V regulator provides power for internal housekeeping, driver power, and light external loads.
- How does the TPS40190DRCTG4 prevent shoot-through current?
It uses an adaptive anti-cross conduction scheme to prevent both the high-side and rectifier MOSFETs from being turned on simultaneously.
- What is the package size of the TPS40190DRCTG4?
The package size is 3 mm × 3 mm, 10-pin SON.
- Does the TPS40190DRCTG4 support pre-biased outputs?
Yes, it supports pre-biased outputs to protect sensitive loads during start-up.
- What is the typical soft-start time of the TPS40190DRCTG4?
The typical soft-start time is 4.7 ms.
- What are some common applications of the TPS40190DRCTG4?
Common applications include cable modem CPE, digital set-top boxes, graphics/audio cards, and entry-level to mid-range servers.
