Overview
The TPS40190DRCRG4, produced by Texas Instruments, is a cost-optimized synchronous buck controller designed for high-performance DC-DC conversion. This controller operates within a voltage range of 4.5 V to 15 V and features a fixed switching frequency of 300 kHz. It is packaged in a small 3 mm × 3 mm, 10-pin VSON (Very Small Outline No-Lead) package, making it suitable for space-constrained applications. The TPS40190DRCRG4 includes several key features such as adaptive anti-cross conduction, internal soft start, and strong gate drivers to minimize switching losses and increase efficiency.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 15.0 | V |
| Switching Frequency | - | 300 | - | kHz |
| Feedback Voltage Range | 582 | 591 | 597 | mV |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Type | - | - | - | 10-Pin VSON |
| RoHS Compliance | - | - | - | Yes |
Key Features
- Voltage Mode Control: The TPS40190DRCRG4 uses voltage mode control for precise regulation of the output voltage.
- Internal 5-V Regulator: An internal 5-V regulator is provided for internal housekeeping, driver power, and to support light external loads.
- Adaptive Anti-Cross Conduction: This feature prevents both the high-side and rectifier MOSFETs from being turned on simultaneously, eliminating shoot-through current.
- Selectable Short-Circuit Protection Thresholds: The controller allows for user-selectable short-circuit protection thresholds, set using an external resistor.
- Internal Soft Start: Reduces inrush current during startup and minimizes stress on the power stage components.
- Strong Gate Drivers: 1.2-A drivers for both high-side and rectifier N-channel MOSFETs to decrease switching losses and increase efficiency.
- Pre-Bias Output Safe: Ensures safe startup with pre-biased outputs, protecting sensitive loads.
- Low Quiescent Current Shutdown Mode: A dedicated enable pin allows the converter to enter a very low quiescent current state during shutdown.
Applications
- Cable Modem CPE: Suitable for cable modem customer premises equipment due to its high efficiency and reliability.
- Digital Set Top Box: Ideal for digital set-top boxes requiring stable and efficient power supply.
- Graphics/Audio Cards: Used in graphics and audio cards to provide a stable and efficient power supply.
- Entry-level and Mid-Range Servers: Applicable in entry-level and mid-range servers for cost-effective and efficient power management.
Q & A
- What is the input voltage range of the TPS40190DRCRG4?
The input voltage range is from 4.5 V to 15 V.
- What is the switching frequency of the TPS40190DRCRG4?
The switching frequency is fixed at 300 kHz.
- What type of package does the TPS40190DRCRG4 come in?
The controller is packaged in a 10-pin VSON (Very Small Outline No-Lead) package.
- Does the TPS40190DRCRG4 have short-circuit protection?
Yes, it has selectable short-circuit protection thresholds set using an external resistor.
- What is the purpose of the internal 5-V regulator in the TPS40190DRCRG4?
The internal 5-V regulator is used for internal housekeeping, driver power, and to support light external loads.
- How does the TPS40190DRCRG4 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 feedback voltage range for the TPS40190DRCRG4?
The feedback voltage range is from 582 mV to 597 mV.
- Is the TPS40190DRCRG4 RoHS compliant?
Yes, the TPS40190DRCRG4 is RoHS compliant.
- What are some typical applications of the TPS40190DRCRG4?
Typical applications include cable modem CPE, digital set-top boxes, graphics/audio cards, and entry-level to mid-range servers.
- How does the TPS40190DRCRG4 handle pre-biased outputs during startup?
The controller ensures safe startup with pre-biased outputs, protecting sensitive loads.
