TPS7A1508PDRVR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The TPS7A1508PDRVR is a low-input, ultra-low dropout linear regulator from the Texas Instruments TPS7A15 series. It provides a fixed 0.8 V output with a maximum current of 400 mA. The device operates within an input voltage range of 0.7 V to 2.2 V and requires a bias voltage between 2.2 V and 5.5 V. It features high accuracy (+1%, -1.1%), excellent load transient response (20 mV), and high power-supply rejection ratio (84 dB at 1 kHz). The component is housed in a 6-pin WSON package measuring 2 mm by 2 mm.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low dropout performance optimized for high efficiency at minimal input-output voltage differentials
• External BIAS pin enables operation with very low input voltages by powering internal circuitry separately
• Active pulldown circuit rapidly discharges the output when disabled to ensure a known start-up state
• Integrated foldback current limit and thermal shutdown protection prevent damage during fault conditions

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Camera modules
• Wireless headphones and earbuds
• Smart watches and fitness trackers
• Solid state drives (SSDs)

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix PDRVR corresponds to the 6-pin WSON package configuration. Confirm that the fixed output voltage matches the system requirement of 0.8 V. Ensure the design accommodates the external BIAS supply rail, as this is mandatory for proper LDO functionality. Check datasheet specifications for required input and output capacitance values to maintain stability.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when the application demands high efficiency under low-voltage conditions where standard LDOs would drop out. The separate BIAS pin allows the main power path to operate near the output voltage while the control circuitry uses a higher voltage rail. Consider the 2x2 mm WSON package size for space-constrained portable designs requiring 400 mA capability.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the TPS7A15 family of low-input, ultra-low dropout regulators designed for battery-powered applications. The family offers various fixed output voltages ranging from 0.5 V to 2.0 V. The TPS7A15 series is characterized by its ability to function with input voltages only slightly above the output voltage, utilizing an external bias supply to drive the internal reference and control loops.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

TPS7A1509PDRVR (Fixed 0.9 V Output)

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How does the BIAS pin affect the input voltage requirements?

The BIAS pin powers the internal circuitry, allowing the main IN pin to operate at voltages as low as 0.7 V or just above the output voltage. This enables high efficiency in low-dropout scenarios.

What happens to the output when the enable pin is driven low?

An active pulldown circuit connects the output to ground through an internal resistor, quickly discharging the output capacitance to ensure a defined start-up state upon re-enablement.