TPS6229x-Q1 1-A Step Down Converter in 2-mm × 2-mm SON Package
1 Features
- Qualified for Automotive Applications
- High Efficiency Step-Down Converter
- Output Current up to 1000 mA
- VIN Range From 2.3 V to 6 V
- 2.25-MHz Fixed Frequency Operation
- Power Save Mode at Light Load Currents
- Output Voltage Accuracy in PWM mode ±1.5%
- Fixed Output Voltage Options
- Typical 15-µA Quiescent Current
- 100% Duty Cycle for Lowest Dropout
- Voltage Positioning at Light Loads
- Available in a 2-mm × 2-mm × 0.8-mm SON Package
2 Applications
3 Description
The TPS6229x-Q1 is a highly efficient synchronous step-down buck converter optimized for automotive low input voltage applications, and provides up to 1000-mA output current..
With an input voltage range of 2.3 V to 6 V, and an output voltage accuracy of 1.5%, the device powers a large variety of automotive applications.
The TPS6229x-Q1 operates at 2.25-MHz fixed switching frequency and enters Power Save Mode operation with typical quiescent current of 15 µA at light load currents to maintain a high efficiency over the entire load current range.
The Power Save Mode is optimized for low output voltage ripple. For low noise applications, the device can be forced into fixed frequency PWM mode by pulling the MODE pin high. In the shutdown mode, the current consumption is reduced to less than 1 µA. The TPS6229x-Q1 allows the use of small inductors and capacitors to achieve a small solution size.
The TPS6229x-Q1 is available in a 2-mm × 2-mm
6-pin SON package.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS6229x-Q1 | SON (6) | 2.00 mm × 2.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Typical Application Schematic
Efficiency vs Output Current
4 Revision History
Changes from A Revision (April 2013) to B Revision
- Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
- Deleted all references to TPS62291-Q1 Go
- Changed description text for MODE in Pin Functions tableGo
- Added PowerPAD row to Pin Functions table Go
- Changed Thermal Information table Go
- Deleted Dissipation Ratings Go
- Deleted List of Components table from Design Requirements Go
- Deleted List of Inductors table from Inductor SelectionGo
- Deleted List of Capacitors table from Input Capacitor Selection Go
- Deleted TPS62291DRV Fixed 3.3 V application from the data sheetGo
Changes from * Revision (April 2013) to A Revision
- Deleted Ordering Information Table.Go
5 Pin Configuration and Functions
Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NO. | NAME | ||
| 1 | SW | O | This is the switch pin and is connected to the internal MOSFET switches. Connect the external inductor between this terminal and the output capacitor. |
| 2 | MODE | I | Pulling this pin to high forces the device to operate in fixed-frequency PWM mode. Pulling this pin to low enables the Power Save Mode with automatic transition from PFM mode to fixed-frequency PWM mode. |
| 3 | FB | I | Feedback Pin for the internal regulation loop. Connect the external resistor divider to this pin. In case of fixed output voltage option, connect this pin directly to the output capacitor |
| 4 | EN | I | This is the enable pin of the device. Pulling this pin to low forces the device into shutdown mode. Pulling this pin to high enables the device. This pin must be terminated. |
| 5 | VIN | PWR | VIN power supply pin. |
| 6 | GND | GND | GND supply pin |
| — | PowerPAD | GND | GND pin must be electrically connected to the exposed pad on the printed-circuit board for proper operation. |
