Texas Instruments TPS7B91 LDO Linear Voltage Regulators
Texas Instruments TPS7B91 Low-Dropout (LDO) Linear Voltage Regulators are low-quiescent current devices. The TPS7B91 offers a wide input voltage range (up to 40V), wide output range, and low-power operation in miniaturized packaging. The wide output range is up to VIN − VDO for the adjustable configuration or up to 12V for the fixed configuration. The TPS7B91 is optimized to power microcontrollers and other low-power loads for battery-powered applications. The TPS7B91 is stable with an output capacitor range of 1.0µF to 47µF.
The Texas Instruments TPS7B91 low quiescent current (1.8µA typically) makes this device designed for battery-powered or always-on systems that require very little idle-state power dissipation. The TPS7B91 LDO supports a low dropout of typically 900mV at 150mA of load current. The TPS7B91 also features an internal soft-start to lower the inrush current during start-up. The built-in fold-back overcurrent limit protection and thermal shutdown help protect the regulator in the event of a load short or fault condition. The TPS7B91 is available in a 2.9mm × 2.8mm, 5-pin SOT-23 (DBV) package for fixed and adjustable outputs.
Features
- 2.5V to 40V input voltage range
- Available output voltage options
- Fixed: 1.2V to 12V
- Adjustable: 1.205V to VIN − VDO
- 150mA output current
- Ultra-low IQ of 1.8µA at IOUT = 0mA
- Stable with output capacitors ≥1.0µF
- High PSRR
- 70dB at 1kHz
- 43dB at 100kHz
- Fold-back current limiting
- Overtemperature protection
- 5-pin SOT-23 (DBV) package
- -40°C to +125°C operating junction temperature
Applications
- Appliances
- Home and building automation
- Retail automation and payment
- Grid infrastructure
- Medical applications
- Lighting applications
Functional Block Diagrams
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