3.5V to 42V Input, 2.5A Step-Down Converter with Eco-Mode
Product details
Parameters
Package | Pins | Size
Features
- 3.5-V to 42-V Input Voltage Range
- 200-mΩ High-Side MOSFET
- High Efficiency at Light Loads With a
Pulse Skipping Eco-Mode™ - 138-µA Operating Quiescent Current
- 1.3-µA Shutdown Current
- 100-kHz to 2.5-MHz Switching Frequency
- Synchronizes to External Clock
- Adjustable Slow Start and Sequencing
- UV and OV Power Good Output
- Adjustable UVLO Voltage and Hysteresis
- 0.8-V Internal Voltage Reference
- 10-Pin HVSSOP and 10-Pin 3-mm x 3-mm
VSON Packages with PowerPAD™ - Supported by WEBENCH® Software Tool
Description
The TPS54240 device is a 42-V, 2.5-A, step-down regulator with an integrated high-side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low-ripple, pulse skip mode reduces the no load, regulated output supply current to 138 µA. Using the enable pin, shutdown supply current is reduced to 1.3 µA, when the enable pin is low.
Undervoltage lockout is internally set at 2.5 V, but it can be increased using the enable pin. The output voltage startup ramp is controlled by the slow-start pin that can also be configured for sequencing and tracking. An open-drain power good signal indicates the output is within 94% to 107% of its nominal voltage.
A wide switching frequency range allows efficiency and optimization of external component size. Frequency foldback and thermal shutdown protects the part during an overload condition.
The TPS54240 is available in 10-pin, thermally-enhanced HVSSOP and 10-pin 3-mm × 3-mm PowerPAD package.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Description
Features
- 3.5-V to 42-V input voltage
- 3.3-V output at 2.5 A
- Eco-mode™ control mode for high efficiency at light loads
- 1200-kHz operating frequency
- Current mode control
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
This worksheet is used to calculate the external components needed to create a dual output (i.e. positive and negative) power supply using a step-down switching regulator and catalog off the shelf coupled (...)
Reference designs
Design files
-
download PMP7371 BOM.pdf (26KB) -
download PMP7371 PCB.pdf (69KB) -
download PMP7371 Gerber.zip (249KB)
Design files
-
download PMP8537 BOM Rev A.pdf (15KB) -
download PMP8537 BOM Rev B.pdf (15KB)
From a 9V to 40V DC input, this design generates a 5V/2.1A output for smart phones and tablets.
Design files
-
download PMP7388 BOM.pdf (27KB) -
download PMP7388 Gerber.zip (116KB)
Design files
-
download PMP5640 BOM.pdf (17KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| HVSSOP (DGQ) | 10 | View options |
| VSON (DRC) | 10 | View options |
Ordering & quality
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