3-V to 17-V, 3-A, high-efficiency and low IQ buck converter 1.5-mm × 2-mm QFN package
Product details
Parameters
Features
- High efficiency for wide duty cycle and load range
- IQ: 4-µA typical
- Selectable switching frequency: 2.5 MHz and 1.0 MHz
- RDS(ON): 62-mΩ high side, 22-mΩ low side
- Automatic efficiency enhancement (AEE)
- Small 1.5-mm × 2.0-mm VQFN package with 0.5-mm pitch
- Up to 3-A continuous output current
- ±0.9% feedback voltage accuracy across temp (-40°C to 150°C)
- Configurable ouput voltage options:
- VFB external divider: 0.6 V to 5.5 V
- VSET internal divider: 16 options between 0.4 V and 5.5 V
- DCS-Control™ topology with 100% mode
- Highly flexible and easy to use
- Optimized pinout for single-layer routing
- Precise enable input
- Forced PWM or auto power save mode
- Power good output
- Selectable active output discharge
- Adjustable soft start and tracking
- No external bootstrap capacitor required
- Create a custom design using the TPS62903 using the WEBENCH Power Designer
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Description
The TPS62903 is a highly-efficient, small, and flexible synchronous step-down DC-DC converter that is easy to use. A selectable switching frequency of 2.5 MHz or 1.0 MHz allows the use of small inductors and provides fast transient response. The device supports high VOUT accuracy of ± 1% with the DCS-Control topology. The wide input voltage range of 3 V to 17 V supports a variety of nominal inputs, like 12-V supply rails, single-cell or multi-cell Li-Ion, and 5-V or 3.3-V rails.
The TPS62903 can automatically enter power save mode (if auto PFM/PWM is selected) at light loads to maintain high efficiency. Additionally, to provide high efficiency at very small loads, the device has a low typical quiescent current of 4 µA. AEE, if enabled, provides high efficiency across VIN, VOUT, and load current. The device includes a MODE/Smart-CONF input to set the internal/external divider, switching frequency, output voltage discharge, and automatic power save mode or forced PWM operation.
The device is available in small 9-pin VQFN package measuring 1.50 mm × 2.00 mm with 0.5-mm pitch.
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | TPS62903, 3-V to 17-V, High Efficiency and Low IQ Buck Converter in 1.5-mm × 2-mm QFN Package datasheet (Rev. A) | Mar. 18, 2021 |
| More literature | TPS62903EVM-069 EU RoHS Declaration of Conformity (DoC) | Dec. 15, 2020 | |
| Technical article | Minimize the impact of the MLCC shortage on your power application | Mar. 29, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- 4 µA IQ
- 1.5-mm x 2-mm QFN package
- 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 |
|---|---|---|
| (RPJ) | 9 | 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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