17-VIN, 3-A low noise and low ripple buck converter with integrated ferrite bead filter compensation
Product details
Parameters
Features
- Low output 1/f noise < 20 µVRMS (100 Hz to 100 kHz)
- Low output voltage ripple < 10 µVRMS after ferrite bead
- High PSRR of > 65 dB (up to 100 kHz)
- 2.2-MHz or 1-MHz fixed frequency peak current mode control
- Synchronizable with external clock (optional)
- Integrated loop compensation supports ferrite bead for second stage L-C filter (optional)
- Spread spectrum modulation (optional)
- 3.0-V to 17-V input voltage range
- 0.8-V to 5.5-V output voltage range
- 57-mΩ/20-mΩ RDSon
- Output voltage accuracy of ±1%
- Precise enable input allows
- User-defined undervoltage lockout
- Exact sequencing
- Adjustable soft start
- Power-good output
- Output discharge (optional)
- -40°C to 150°C junction temperature range
- 2.0-mm x 2.0-mm QFN with 0.5-mm pitch
- Create a custom design using the TPS6291x with the WEBENCH Power Designer
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Description
The TPS6291x devices are a family of high efficiency low noise and low ripple synchronous buck converters. The devices are ideal for noise sensitive applications that would normally use an LDO for post regulation such as high speed ADCs, Clock and Jitter Cleaner, Serializer, De-serializer, and Radar applications.
The device operates at a fixed switching frequency of 2.2 MHz or 1 MHz, and can be synchronized to an external clock.
To further reduce the output voltage ripple, the device integrates loop compensation to operate with an optional second-stage ferrite bead L-C filter. This allows an output voltage ripple below 10 µVRMS.
Low-frequency noise levels, similar to a low-noise LDO, are achieved by filtering the internal voltage reference with a capacitor connected to the NR/SS pin.
The optional spread spectrum modulation scheme spreads the DC/DC switching frequency over a wider span, which lowers the mixing spurs.

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Preproduction samples are available (XPS62913RPUR). Request now
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TPS6291x 2A/3A Low Noise and Low Ripple Buck Converter datasheet (Rev. A) | Sep. 28, 2020 |
Technical articles | Powering medical imaging applications with DC/DC buck converters | Nov. 24, 2020 | |
Technical articles | Minimize noise and ripple with a low-noise buck converter | Oct. 21, 2020 | |
Application note | Powering Sensitive Noise ADC Designs with the TPS62913 Low-Noise Buck Converter | Sep. 30, 2020 | |
More literature | TPS62913EVM-077 EU Declaration of Conformity (DoC) | Jul. 20, 2020 | |
Technical articles | Understanding and managing buck regulator output ripple | Jun. 18, 2020 | |
User guide | TPS6291xEVM-077 User's Guide | May 21, 2020 | |
Technical articles | Minimize the impact of the MLCC shortage on your power application | Mar. 29, 2019 | |
Application note | Output Ripple Voltage for Buck Switching Regulator (Rev. A) | Oct. 13, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
Low output voltage ripple ( < 10 μVRMS)
3-V to 17-V input voltage range
1.2-V output voltage
3-A output current
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 |
---|---|---|
(RPU) | 10 | 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
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Support & training
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