http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps631000″>View Datasheet

Texas Instruments TPS631000 Buck-Boost Converter

Texas Instruments TPS631000 Buck-Boost Converter is a constant frequency peak current mode control buck-boost converter. The device has a 3A peak current limit (typical) and a 1.6V to 5.5V input voltage range. The TPS631000 provides a power supply solution for system pre-regulators and voltage stabilizers.

Depending on the input voltage, the TPS631000 automatically operates in boost, buck, or 3-cycle buck-boost mode when the input voltage is approximately equal to the output voltage. The transitions between modes happen at a defined duty cycle and avoid unwanted toggling within the modes to reduce output voltage ripple. An 8µA quiescent current and power save mode power enable the highest efficiency for light to no-load conditions.

The Texas Instruments TPS631000 offers a tiny solution size with a 1.2mm × 2.1mm SOT-583 package, a 1µH inductor, and one 0805 output capacitor.

Features

1.6V to 5.5V input voltage range
- Device input voltage > 1.65V for start-up
1.2V to 5.3V output voltage range (adjustable)
High output current capability, 3A peak switch current
- 2A output current for V_IN ≥ 3V, V_OUT = 3.3V
- 1.5A output current for V_IN ≥ 2.7V, V_OUT = 3.3V
High efficiency over the entire load range
- 8µA typical quiescent current
- Power save mode
150mV load-step response at a 1A current step
Peak current buck-boost mode architecture
- Seamless mode transition with < 20mV output ripple
- Forward and reverse current operation
- Start-up into pre-biased outputs
- Fixed-frequency operation with 2MHz switching

Safety and robust operation features
- Overcurrent protection and short-circuit protection
- Integrated soft start with active ramp adoption
- Overtemperature protection and overvoltage protection
- True shutdown function with load disconnect
- The forward and backward current limit
Small solution size
- Small 1µH inductor
- Works with one 0805 output capacitor over the full V_OUT range

Applications

System pre-regulator (smartphone, tablet, terminal, telematics)
Point-of-load regulation (wired sensor, port/cable adapter, and dongle)
Fingerprint, camera sensors (electronic smart lock, IP network camera)

RF amplifier supply (smart sensors)
Voltage stabilizer (datacom, optical modules, cooling/heating)

Texas Instruments TPS631000 Buck-Boost Converter

Features

Applications

Functional Block Diagram

husseinkey ELECTRONICS®

COMPANY