TPS7A1518PDRVR

The TPS7A15 is a small low-dropout regulator (LDO) with excellent transient response. The device can deliver 400 mA and provides outstanding AC performance (load and line transient response). The input voltage range is 0.7 V to 2.2 V, with an output range of 0.5 V to 2.0 V, achieving up to 1% accuracy over load, line, and temperature variations. The main power path flows through the IN pin, which can be connected to a supply 50 mV above the output voltage. All electrical characteristics — including excellent output voltage tolerance, transient response, and power supply rejection ratio — are specified at an input voltage 100 mV above the output voltage, enabling high practical efficiency. The regulator supports very low input voltages by powering the LDO's internal circuitry from a higher externally supplied VBIAS rail. For example, the supply voltage at the IN pin can be the output of a high-efficiency DC/DC buck regulator, while the supply voltage at the BIAS pin can be a rechargeable battery. The TPS7A15 features an active pull-down circuit that rapidly discharges the output when disabled and provides a known startup state. The TPS7A15 is available in a 2 mm × 2 mm, 6-pin WSON package and an ultra-small 0.71 mm × 1.0 mm, 6-bump WCSP package.

Applications

• Camera modules
• Wireless headphones and earbuds
• Smartwatches and fitness trackers
• Smartphones and tablets
• Portable medical devices
• Solid-state drives (SSD)

Key features

• Ultra-low input voltage range: 0.7 V to 2.2 V
• High efficiency:
• Dropout at 400 mA: 80 mV (maximum)
• Specified at VIN = VOUT + 100 mV
• Excellent load transient response:
• 20 mV for load current step from 1 mA to 250 mA within 10 μs
• Accuracy (load, line, temperature): +1%, –1.1%
• High PSRR: 84 dB at 1 kHz
• Fixed output voltage options:
• 0.5 V to 2.0 V (in 25 mV steps)
• VBIAS range:
• 2.2 V to 5.5 V
• Package:
• 6-pin, 1 mm × 0.71 mm DSBGA
• 6-pin, 2 mm × 2 mm WSON
• Active output discharge