ST1PS03A1QTR STMicroelectronics Integrated Circuit (Other) In Stock
The ST1PS03A1QTR is a 400 mA nano-quiescent synchronous step-down converter from STMicroelectronics, operating from a 1.8V to 5.5V input with current-mode PWM control, digital voltage selection, a Power Good flag, and an integrated load switch in a compact 12-pin QFN package for battery-powered wearables and IoT sensors.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 12
- Lifecycle
- ACTIVE
- Datasheet
- ST1PS03A1QTR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5081(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ST1PS03A1QTR?
- 400 mA synchronous buck converter output
- Nano-quiescent current for extended battery life
- Wide input voltage range from 1.8 V to 5.5 V
- Current-mode PWM control loop
- Digital output voltage selection
- Integrated Power Good flag and load switch
- Compact 12-pin QFN package
What is ST1PS03A1QTR used for?
The ST1PS03A1QTR is designed for ultra-low-power point-of-load conversion in wearables, hearables, and battery-powered IoT sensor nodes that need long standby life from a 1.8 V to 5.5 V input. Its digital voltage selection and integrated load switch simplify power-rail sequencing in compact wireless and medical devices.
What are the specifications of ST1PS03A1QTR?
| YTEOL | 8 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 1.8V |
| Input Voltage-Nom | 3.6V |
| JESD-30 Code | R-PQCC-N12 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.4A |
| Output Voltage-Max | 3.3V |
| Output Voltage-Min | 1.6V |
| Output Voltage-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC12,.06X.08,16 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Nom (Vsup) | 3.6V |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2000kHz |
| Technology | PMOS |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.4mm |
| Terminal Position | QUAD |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Where can I find the ST1PS03A1QTR datasheet?
ST1PS03A1QTR Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ST1PS03A1QTR?
Compatible alternatives and drop-in replacements for ST1PS03A1QTR:
Switching Regulator, Current-mode, 0.4A, 2000kHz Switching Freq-Max, PMOS, PQCC12
Frequently Asked Questions
How efficient is the ST1PS03A1QTR's quiescent current for standby power budgets?
The ST1PS03A1QTR is a nano-quiescent synchronous step-down converter delivering up to 400 mA of output current from a 1.8 V to 5.5 V input, using current-mode PWM control to minimize standby power draw in battery-powered designs.
How compact is the QFN package housing the ST1PS03A1QTR's regulator and load switch?
The ST1PS03A1QTR integrates a synchronous buck regulator, Power Good comparator, and load switch inside a 12-pin QFN package rated for a 1.8 V to 5.5 V input, helping designers save board area in space-constrained wearable products.
What reel quantity does the QTR suffix indicate for the ST1PS03A1QTR?
The QTR suffix on the ST1PS03A1QTR denotes tape-and-reel packaging in the 12-pin QFN format, typically supplied in reels of 3000 units so contract manufacturers can maintain continuous automated placement of this 400 mA regulator.
Which battery-powered products benefit from the ST1PS03A1QTR's digital voltage selection feature?
Because the ST1PS03A1QTR supports digital output voltage selection alongside a 400 mA current rating and 1.8 V to 5.5 V input range, it is commonly used in true wireless earbuds, fitness trackers, and other compact devices that must switch rail voltages under firmware control.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5081 | $0.51 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit