STMicroelectronics ST1PS02 Synchronous Step-Down Converter
STMicroelectronics ST1PS02 Synchronous Step-Down Converter provides up to 400mA output current with an input voltage ranging from 1.8V to 5.5V. This nano-quiescent step-down converter is specifically designed for applications where high efficiency, PCB size, and PCB thickness are the key factors. The output voltage can be set using two digital control inputs, a VOUT from 1.8V to 3.3V can be dynamically selected. Thanks to the enhanced peak current control PCC), the STMicroelectronics ST1PS02 reaches very high-efficiency conversion using a 2.2µH inductor and two small capacitors. This device embeds a controlled load switch to supply a subsystem with the same voltage rail. Advanced design circuitry is implemented to minimize the quiescent current.
Features
- 500nA input quiescent current at VIN = 3.6V (not switching)
- 94% typical efficiency at 1mA load (VIN = 3.6V, VOUT = 3.3V)
- 100% duty cycle
- 1.8V to 5.5V input operating range
- 1.57V (VIN falling) under-voltage lockout
- Up to 400mA output current capability
- Low power control operation for high efficiency
- Embedded soft-start circuit
- Tiny external components: 2.2µH typical L
- Settable inductor current limitation
- 1.0V to 3.3V output voltages selectable
- Output voltage Power Good
- ±1.5% output voltage accuracy (VOUT, TA = 25°C)
- Dynamic output voltage selection (D0, D1, and D2)
- Auxiliary load switch Vout2 (AUX control input)
- -40°C to +85°C operating temperature range
- TQFN12 package
Applications
- Wearable applications
- Personal tracking monitors
- Smart watches, sport bands
- Energy harvesting, wireless sensors
- Wearable and fitness accessories
- Industrial sensors, portable low-power devices
- Single-cell Li-Ion battery applications
- BLUETOOTH® low energy
- Zigbee
Videos
Typical Application Circuit
Block Diagram
Development Tools
STMicroelectronics STEVAL-1PS02B Evaluation Board
Demonstration circuit based on the ST1PS02BQTR nano-quiescent synchronous step-down converter.
STMicroelectronics STEVAL-1PS02A Eval Board Based on ST1PS02AQTR
Used to evaluate a smart converter design able to deliver up to 400mA output current.
STMicroelectronics STEVAL-1PS02C Eval Board Based on ST1PS02CQTR
Allows evaluation of a smart converter design able to deliver up to 400mA output current.
STMicroelectronics STEVAL-1PS02D Eval Board Based on ST1PS02DQTR
Allows evaluation of a smart converter that delivers up to 400mA output current.
STMicroelectronics STEVAL-ASTRA1B Asset Tracking Evaluation Board
Reference design that simplifies prototyping, testing, and evaluating asset tracking applications.
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