2.25 to 5.5 V input, 300 kHz, synchronous buck controller with low pin count
Product details
Parameters
Package | Pins | Size
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.
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.
Technical documentation
| 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
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 (...)
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
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
- (...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SON (DRB) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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