Texas Instruments' TPS63900 device is a high-efficiency synchronous buck-boost converter with an extremely low quiescent current of 75 nA (typ.). The device has 32 user-programmable output voltage settings from 1.8 V to 5 V. A dynamic voltage-scaling feature lets applications switch between two output voltages during operation; for example, to save power by using a lower system supply voltage during standby operation. With its wide supply voltage range and programmable input current limit (1 mA to 100 mA and unlimited), the device is ideal for use with a wide range of primary such as 3S Alkaline, 1S Li-MnO2 or 1S Li-SOCl2, and secondary battery types. The high-output current capability supports commonly-used RF standards including sub-1 GHz, BLE, LoRa, wM-Bus, and NB-IoT.
Features
- Input voltage range: 1.8 V to 5.5 V
- Output voltage range: 1.8 V to 5 V (100 mV steps):
- Programmable with external resistors
- SEL pin to toggle between two output voltage presets
- Output current: >400 mA for VI ≥2.0 V, VO = 3.3 V (typ. 1.45 A peak switching current limit):
- Stackable: parallel multiple devices for higher output current
- Safety and robust operation features:
- Integrated soft-start
- Programmable input current limit with eight settings (1 mA to 100 mA and unlimited)
- Output short-circuit and overtemperature protection
- Efficiency: >90% at 10 µA load current:
- Quiescent current: 75 n
- Shutdown current: 60 nA
- Single-mode operation:
- Eliminates mode transitions between buck, buck-boost, and boost operation
- Low output ripple
- Excellent transient performance
- Tiny solution size of 21 mm2
- Small 2.2 µH inductor, single 22 µF output capacitor
- 10-pin, 2.5 mm × 2.5 mm, 0.5 mm pitch WSON package
Applications
- Smart meters and sensor nodes
- Electronic smart locks
- Medical sensor patches and patient monitors
- Wearable electronics
- Asset tracking
- Industrial IoT (smart sensors), NB-IoT
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Texas Instruments' TPS63900 device is a high-efficiency synchronous buck-boost converter with an extremely low quiescent current of 75 nA (typ.). The device has 32 user-programmable output voltage settings from 1.8 V to 5 V. A dynamic voltage-scaling feature lets applications switch between two output voltages during operation; for example, to save power by using a lower system supply voltage during standby operation. With its wide supply voltage range and programmable input current limit (1 mA to 100 mA and unlimited), the device is ideal for use with a wide range of primary such as 3S Alkaline, 1S Li-MnO2 or 1S Li-SOCl2, and secondary battery types. The high-output current capability supports commonly-used RF standards including sub-1 GHz, BLE, LoRa, wM-Bus, and NB-IoT.
