TPS40040

ACTIVE

2.25 to 5.5 V input, 300 kHz, synchronous buck controller with low pin count

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Product details

Parameters

Vin (Min) (V) 2.25 Vin (Max) (V) 5.5 Vout (Min) (V) 0.6 Vout (Max) (V) 4.95 Iout (Max) (A) 15 Iq (Typ) (uA) 2000 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of Phases 1 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

VSON (DRB) 8 9 mm² 3 x 3 VSON (DRB) 8 9 mm² 3.0 x 3.0 open-in-new Find other Buck controllers (external switch)

Features

  • 2.25-V to 5.5-V Input
  • Output Voltage from 0.6 V to 90% of VIN
  • High-Side Drive for N-Channel FET
  • Supports Pre-Biased Outputs
  • Adaptive Anti-Cross Conduction Gate Drive
  • 1%, 0.6-V Reference
  • Two Fixed Switching Frequency Versions, TPS40040 (300 kHz) and TPS40041 (600 kHz)
  • Three Selectable Short Circuit Protection Levels of 105 mV, 180 mV and 310 mV
  • Hiccup Restart from Faults
  • Voltage Mode Control
  • Active Low Enable
  • Thermal Shutdown Protection at 145°C
  • 8-Pin, 3-mm × 3-mm SON with Ground Connection to Thermal Pad
  • APPLICATIONS
    • Point of Load
    • Telecommunications
    • DC to DC Modules
    • Set Top Boxes

PowerPAD Is a trademark of Texas Instruments.
Predictive Gate Drive Is a trademark of Texas Instruments.

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Description

The TPS40040 and TPS40041 dc-to-dc controllers are designed to operate from a 2.25-V to 5.5-V input source. To reduce the number of external components, several operating parameters are fixed internally; namely, frequency, soft start time, and short circuit protection (SCP) levels. For example, the operating frequencies of TPS40040/1 are 300 kHz/600 kHz, respectively.

One of three short circuit threshold levels may be selected by the addition of an external resistor from the COMP pin to circuit ground. During power on, and before the internal soft start commands the output voltage to rise, the TPS40040/1 enters a calibration cycle, measures the current out of the COMP pin, and selects an internal SCP threshold voltage. At the end of the 1.6-ms calibration time, the output voltage is allowed to rise for a 4-ms soft start. During operation, the selected SCP threshold voltage is compared to the upper MOSFET’s voltage drop during its ON time to determine whether there is an overload condition.

The packaging of the TPS40040/1 is unique in that the PowerPAD™ is used as an electrical ground connection as well as a thermal connection.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet Low Pin Count, Low VIN (2.5V to 5.5V Synchronous Buck DC-to-DC Controller datasheet (Rev. D) Dec. 12, 2007
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Selection guide DC/DC Buck Controller Solutions Selection Guide Feb. 06, 2018
Application note Analysis and Design of Input Filter for DC-DC Circuit Nov. 27, 2017
Selection guide Control-Mode Quick Reference Guide (Rev. A) Sep. 14, 2017
More literature Исходные проекты ll May 13, 2011
User guide Using the TPS40040-EVM-001 Jan. 29, 2007
User guide A 5-V Input, 1.8-V Output, 6-A Synchronous Buck Converter Apr. 10, 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
49
Description

The TPS40040EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.8 V output at up to 10 A from a 5 V input bus. The EVM is designed to start up from a single supply, so no additional bias voltage is required for startup. The module uses the TPS40040 (...)

Features
  • 4.5 V to 5.5 V input range
  • 1.8 V fixed output, adjustable with single resistor
  • 10 A dc steady-state output current
  • 300 kHz switching frequency (fixed by TPS40040)
  • Single main switch MOSFET for both main switch and synchronous rectifier
  • Double-sided 2 active layer PCB with all components on top side
  • Active (...)
EVALUATION BOARD Download
49
Description

The TPS40041EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.8 V output at up to 6 A from a 5 V input bus or 3 A from a 3.3 V input. The EVM is designed to start up from a single supply, so no additional bias voltage is required for (...)

Features
  • 3.0 V to 5.5 V input range
  • 1.8 V fixed output, adjustable with single resistor
  • 6 ADC steady state output current (3 A at 3.3 V input)
  • 600 kHz switching frequency (fixed by TPS40041)
  • Single SO-8 dual MOSFET for both main switch and synchronous rectifier
  • Double sided 2 layer PCB with all components on top side
  • (...)

Design tools & simulation

SIMULATION MODEL Download
SLVJ008A.ZIP (108 KB) - PSpice Model
SIMULATION MODEL Download
SLVJ009A.TSC (566 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVM028.TSC (753 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVM029.TSM (21 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLVM032A.ZIP (67 KB) - PSpice Model
SIMULATION MODEL Download
SLVM072.TSM (6 KB) - TINA-TI Spice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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
  • (...)
CALCULATION TOOL Download
SLUC263D.ZIP (131 KB)

CAD/CAE symbols

Package Pins Download
SON (DRB) 8 View options

Ordering & quality

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  • Ongoing reliability monitoring

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