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The ST1PS01 is a nano-quiescent miniaturized synchronous step-down converter, which is able to provide up to 400 mA output current with an input voltage ranging from 1.8 V to 5.5 V. This converter is specifically designed for applications where high efficiency, PCB size and thickness are the key factors. The output voltage can be set using two digital control inputs, a VOUT from 1.8 V to 3.3 V can be dynamically selected. Thanks to the enhanced PCC (peak current control) the ST1PS01 reaches very high efficiency conversion using just a 2.2 µH inductor and two small capacitors. Advanced design circuitry is implemented to minimize the quiescent current. The device is available in Flip-Chip package.
Key Features
- 500 nA input quiescent current at VIN=3.6 V (not switching)
- 94% typical efficiency at 1 mA load (VIN=3.6 V, VOUT=3.3 V)
- 100% duty cycle
- 1.8 V to 5.5 V input operating range
- Undervoltage lockout: 1.57 V (VIN falling, typ.)
- Up to 400 mA output current capability
- Low power control operation for the best efficiency
- Embedded soft-start circuit
- Tiny external components: L=2.2 µH typ.
- Selectable output voltages: 1.8 V to 3.3 V
- Output voltage Power Good
- ±1.5% output voltage accuracy (VOUT, TA=25 °C)
- Dynamic output voltage selection (D0, D1)
- Available in Flip-Chip package
Sample & Buy
| Part Number | Package | Packing Type | Marketing Status | Budgetary Price (US$)* | Quantity | ECCN (US) | Country of Origin | Order from Distributors | Order from ST |
|---|---|---|---|---|---|---|---|---|---|
| ST1PS01AJR | Chip Scale Package 0.4mm pitch | Tape And Reel | Active | 0.686 | 1000 | EAR99 | - | Check Availability | Get sample |
| ST1PS01DJR | Chip Scale Package 0.4mm pitch | Tape And Reel | Active | 0.686 | 1000 | EAR99 | - | Check Availability | Get sample |
| ST1PS01EJR | Chip Scale Package 0.4mm pitch | Tape And Reel | Active | 0.686 | 1000 | EAR99 | - | Check Availability | Get sample |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
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Picture Part number Manufacturer Description 
STEVAL-1PS01AJR ST Evaluation board based on ST1PS01AJR 400 mA nano-quiescent synchronous step-down converter 
STEVAL-1PS01DJR ST Evaluation board based on ST1PS01DJR 400 mA nano-quiescent synchronous step-down converter 
STEVAL-1PS01EJR ST Evaluation board based on the ST1PS01EJR 400 mA nano-quiescent synchronous step-down converter 
STEVAL-STRKT01 ST LoRa® IoT tracker Part NumberEvaluation board based on ST1PS01AJR 400 mA nano-quiescent synchronous step-down converter
Evaluation board based on ST1PS01DJR 400 mA nano-quiescent synchronous step-down converter
Evaluation board based on the ST1PS01EJR 400 mA nano-quiescent synchronous step-down converter
LoRa® IoT tracker
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| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| ST1PS01AJR | Active | Chip Scale Package 0.4mm pitch | Industrial | Ecopack2 | |
| ST1PS01DJR | Active | Chip Scale Package 0.4mm pitch | Industrial | Ecopack2 | |
| ST1PS01EJR | Active | Chip Scale Package 0.4mm pitch | Industrial | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
