TPS8268x 1600-mA High-Efficiency MicroSiP Step-Down Converter Module (Profile < 1.0mm)
1 Features
- Wide VIN Range From 2.5V to 5.5V
- Total Solution Size < 6.7 mm2
- Sub 1-mm Profile Solution
- ±1.5% DC Voltage Accuracy
- Up to 1600-mA Load Current
- Up to 90% Efficiency
- Fixed Output Voltage:
- Low EMI by Spread Spectrum PWM Frequency Dithering
- Best in Class Load and Line Transient Response
- Internal Soft Start
- Current Overload and Thermal Shutdown Protection
2 Applications
- Optical Modules
- Cell Phones, Smart-Phones
- Solid State Disk Drive Applications
- Space constrained applications
3 Description
The TPS8268x device is a complete DC/DC step-down power supply optimized for small solution size. Included in the package are the switching regulator, inductor and input/output capacitors. Integration of all passive components enables a tiny solution size of only 6.7mm2.
The TPS8268x is based on a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications in which high load currents in a very small solution size and height are required. The TPS8268x is optimized for high efficiency and low output voltage ripple and supports up to 1600-mA load current. With an input voltage range of 2.5-V to 5.5-V, the device supports applications powered by Li-Ion batteries as well as 5-V and 3.3-V rails.
The TPS8268x operates at a 5.5-MHz switching frequency with spread spectrum capability. For noise-sensitive applications, this provides a lower noise regulated output, as well as low noise at the input. The device supports a fixed output voltage, requiring no external feedback network.
These features, combined with high PSRR and AC load regulation performance, make this device suitable to replace a linear regulator to obtain better power conversion efficiency with the same size.
The TPS8268x is packaged in a compact (2.3mm x 2.9mm) and low profile BGA package suitable for automated assembly by standard surface mount equipment.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS8268180 | µSIP | 2.30 mm × 2.90 mm |
| TPS8268150 | µSIP | 2.30 mm × 2.90 mm |
| TPS8268120 | µSIP | 2.30 mm × 2.90 mm |
| TPS8268105 | µSIP | 2.30 mm × 2.90 mm |
| TPS8268090 | µSIP | 2.30 mm × 2.90 mm |
- For all available packages, see the orderable addendum at the end of the datasheet.
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Typical Application
Efficiency vs Load Current for TPS8268180
4 Revision History
Changes from B Revision (June 2015) to C Revision
- Deleted "Preview" from Device Comparison Table and Electrical Characteristics table for TPS8268120 and TPS8268180 devices Go
Changes from A Revision (November 2014) to B Revision
- Added Preview devices TPS8268180 and TPS8268120 specifications and typical application curves to the data sheet. Go
- Moved timing specs from Electrical Characteristics table to Timing Requirements table Go
Changes from * Revision (October 2014) to A Revision
- Changed from Product Preview to Production Data Go
5 Device Comparison Table (1)
6 Pin Configuration and Functions
Pin Functions
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| VOUT | A1, A2 | O | Power output pin. Apply output load between this pin and GND. |
| VIN | A3, B3 | I | Supply voltage connection |
| EN | B2 | I | This is the enable pin of the device. Connecting this pin low forces the device into shutdown mode. Pulling this pin high enables the device. This pin must not be left floating and must be terminated. |
| MODE | B1 | I | This pin must be tied to the input supply voltage VIN. |
| GND | C1, C2, C3 | – | Ground pin. |
