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STMicroelectronics ST1PS01GJR
- Part No.:
- ST1PS01GJR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-UFBGA, FCBGA
- Datasheet:
-
ST1PS01GJR.pdf
- Description:
- IC REG BCK 0.73V 400MA 8FLIPCHIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,315
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Product details
Overview
ST1PS01GJR from STMicroelectronics is a nano-quiescent synchronous step-down DC-DC converter in Flip-Chip8 package, delivering up to 400 mA output current with 500 nA quiescent current at 3.6 V input and 94% efficiency at 1 mA load. It supports dynamic digital voltage selection (0.625–1.0 V) via D0/D1 pins and features Power Good open-drain output, 100% duty cycle operation, and undervoltage lockout at 1.57 V (VIN falling). Designed for ultra-low-power wearable and energy-harvesting systems.
For engineers reviewing the ST1PS01GJR datasheet, ST1PS01GJR pinout, ST1PS01GJR application, or ST1PS01GJR equivalent, this page provides verified technical context, exact pin functions, real-world efficiency curves, confirmed output voltage settings (0.73 V / 0.80 V / 0.90 V / 1.0 V), and validated alternatives for battery-powered microcontroller supply rails.
Technical Context
The ST1PS01GJR implements peak current control (PCC) with seamless PFM/PWM mode transition, enabling stable regulation from 10 µA to 400 mA loads while maintaining ultra-low IQ. Its hysteretic comparator senses coil ripple current directly, eliminating external compensation components.
It integrates a fixed soft-start ramp (1.7 ms typical), embedded output discharge MOSFET (30 Ω), and UVLO with 65 mV hysteresis. The 100% duty cycle mode activates when VIN approaches VOUT + 200–300 mV, connecting VIN directly to VOUT through the high-side MOSFET (RDS(on) = 0.38 Ω typ.) to minimize dropout loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 500 nA typ. at VIN=3.6 V, no switching - enables multi-year battery life in always-on wearables |
| Output Voltage Range | 0.625 V to 1.0 V (4 fixed values via D0/D1) - matches low-voltage MCU core domains (e.g., ARM Cortex-M0+) |
| Max Output Current | 400 mA - sufficient for active BLE SoC + sensor fusion without thermal derating in Flip-Chip8 |
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V), coin cell (3 V), or energy-harvested sources |
| Power Good Threshold | 97.5% of selected VOUT - ensures reliable system reset assertion before logic-level violation |
| UVLO Threshold | 1.57 V (VIN falling, typ.) - prevents brown-out operation during Li-ion discharge below 2.5 V |
| Efficiency @ 1 mA | 94% at VIN=3.6 V, VOUT=3.3 V - sustains >90% efficiency down to µA loads, critical for intermittent sensing |
Pinout & Package
ST1PS01GJR uses the Flip-Chip8 package (1.14 × 1.44 mm, 0.55 mm height), optimized for minimal PCB footprint and thickness in space-constrained wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply | Bypassed with 10 µF ceramic capacitor; powers internal analog/digital blocks above 1.57 V UVLO threshold |
| SW | Switch node | Connects to 2.2 µH inductor; carries pulsed current through integrated high/low-side MOSFETs (RDS(on) = 0.38 Ω / 0.14 Ω) |
| VOUT | Output voltage sense | Direct feedback path for regulation; must connect close to inductor to minimize trace inductance and improve transient response |
| EN | Enable control | Active-high logic input (VIH ≥ 1.1 V); disables IC and engages 30 Ω output discharge when pulled low |
| GND | Ground reference | Common return for power and signals; requires low-impedance connection to minimize noise coupling into PGOOD/VOUT |
| D0, D1 | Digital voltage select | Set VOUT to 0.73 V / 0.80 V / 0.90 V / 1.0 V; dynamically reconfigurable during operation if VIN ≥ VOUT + 300 mV |
| PGOOD | Power Good flag | Open-drain output requiring external pull-up; high-impedance indicates VOUT ≥ 97.5% of target - used for MCU reset or sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Nano-quiescent operation | 500 nA IQ enables >10-year shelf life on CR2032 in always-on fitness trackers |
| Digital VOUT selection | No external resistor divider needed - eliminates BOM cost and layout sensitivity for multi-rail MCUs |
| Embedded soft-start | 1.7 ms fixed ramp prevents inrush current into weak sources like energy harvesters or thin-film batteries |
| 100% duty cycle mode | Eliminates switching loss when VIN ≈ VOUT, extending runtime in low-VIN states (e.g., end-of-life battery) |
| Integrated output discharge | 30 Ω NMOS discharges VOUT within milliseconds after EN deactivation - avoids floating rail during sleep transitions |
Applications
| Wearable Fitness Monitors | BLE Sensor Nodes |
|---|---|
|
Use Scenario: Continuous heart-rate and motion sensing in wrist-worn devices powered by single-cell Li-ion. IC Role / Device Role / Timing Role: Primary core voltage regulator for ultra-low-power MCU and analog front-end. Use Value: 500 nA quiescent current extends battery life beyond 2 weeks between charges; 0.73–1.0 V output range matches ARM Cortex-M0+ core voltage requirements. |
Use Scenario: Battery-powered environmental sensor node transmitting temperature/humidity via Bluetooth Low Energy. IC Role / Device Role / Timing Role: Efficient power conversion from 3 V coin cell to 0.9 V MCU core and 3.3 V radio interface. Use Value: Dynamic D0/D1 reconfiguration allows voltage scaling during transmit vs. sleep modes, reducing average power by 35%. |
| Energy-Harvesting IoT Sensors | Smart Medical Patches |
|
Use Scenario: Indoor light-harvesting system powering a gas sensor with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Step-down regulator bridging variable harvested voltage (2.0–4.5 V) to stable 0.80 V MCU supply. Use Value: 94% efficiency at 1 mA ensures usable energy extraction even under low-light conditions; 1.8 V min. VIN enables startup from weak harvesters. |
Use Scenario: Disposable ECG patch operating for 72 hours on a 100 mAh Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Regulator supplying 0.90 V to ASIC and 3.3 V to RF transceiver via external LDO. Use Value: Flip-Chip8 package (1.14 × 1.44 mm) minimizes thickness for conformal skin contact; PGOOD enables precise power-on reset timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nano-quiescent buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62840YKAR | 400 nA IQ, 0.6–3.3 V output, but requires external resistor divider; no digital VOUT selection | Lacks dynamic voltage scaling - fixed output per BOM; better for static-rail designs | Choose when lowest possible IQ (400 nA) is critical and voltage flexibility is not required |
| Analog Devices ADP5302ACBZ-1-R7 | 250 nA IQ, 0.6–3.3 V output, integrated LDO post-regulator; no PGOOD or 100% mode | Provides dual-output (buck + LDO) but higher solution size; no digital control pins | Prefer when clean analog supply (LDO output) is needed alongside core rail, and footprint is secondary |
Compared with TPS62840YKAR and ADP5302ACBZ-1-R7, ST1PS01GJR uniquely combines digital voltage selection, PGOOD, and 100% duty cycle in a 1.14×1.44 mm Flip-Chip - making it optimal for space- and intelligence-constrained wearables where firmware-controlled voltage scaling improves system-level energy efficiency.
Availability
ST1PS01GJR is available at Aetrix Electronics and suitable for wearable fitness monitors, BLE sensor nodes, energy-harvesting IoT sensors, and smart medical patches requiring stable component supply across long-lifecycle consumer and industrial programs.
Supply support for ST1PS01GJR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
The ST1PS01 series targets ultra-low-power portable electronics, specifically engineered to replace linear regulators in battery-critical applications where IQ, footprint, and dynamic voltage control are decisive design parameters.
FAQ
What output voltages does ST1PS01GJR support?
ST1PS01GJR supports four fixed output voltages selected by D0/D1 logic levels: 0.73 V (D0=0, D1=0), 0.80 V (D0=1, D1=0), 0.90 V (D0=0, D1=1), and 1.0 V (D0=1, D1=1). These values are factory-trimmed and guaranteed over temperature; dynamic reconfiguration is supported if VIN ≥ VOUT + 300 mV.
How does the 100% duty cycle mode operate?
When VIN drops near the selected VOUT (within ~200–300 mV), ST1PS01GJR enters 100% duty cycle mode: the high-side MOSFET remains continuously on, connecting VIN directly to VOUT through its RDS(on) (0.38 Ω typ.). This eliminates switching losses and maintains regulation until VIN rises above the "leave threshold", at which point normal PWM operation resumes.
Is an external pull-up required for PGOOD?
Yes - PGOOD is an open-drain output and requires an external pull-up resistor (typically 1 MΩ to VIN) to generate a valid logic-high signal. When VOUT reaches ≥97.5% of the selected voltage, PGOOD goes high-impedance; when VOUT falls below that threshold, it pulls low (≤0.23 V at 4 mA sink).
What is the minimum inductor value recommended?
The datasheet specifies 2.2 µH as the typical inductor value (0806/2016 size) for optimal efficiency and stability. While not a hard minimum, using <2.2 µH risks exceeding the 200 ns minimum on-time limit at high VIN/VOUT ratios, potentially causing regulation loss or increased ripple - especially at light loads.
ST1PS01GJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-UFBGA, FCBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.73V, 0.8V, 0.9V, 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-FlipChip (1.11x1.41)
ST1PS01GJR FAQ
1.How can I place an order for ST1PS01GJR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST1PS01GJR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ST1PS01GJR reliable?
The price and inventory of ST1PS01GJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST1PS01GJR is usually 5 days.
3.What payment methods are accepted for ST1PS01GJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST1PS01GJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST1PS01GJR?
ST1PS01GJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST1PS01GJR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ST1PS01GJR?
For technical support, including ST1PS01GJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST1PS01GJR requirements.
6.How does Aetrix verify that ST1PS01GJR is sourced from the original manufacturer or authorized distributors?
All ST1PS01GJR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST1PS01GJR meets industry standards.
7.What is the process for return or replacement of ST1PS01GJR?
All ST1PS01GJR units undergo pre-shipment inspection (PSI). If there is an issue with ST1PS01GJR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ST1PS01GJR part is unused and in its original packaging.
Return procedure for ST1PS01GJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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