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STMicroelectronics STOD03ATPUR
- Part No.:
- STOD03ATPUR
- Manufacturer:
- STMicroelectronics
- Category:
- Special Purpose Regulators
- Package:
- 12-UFDFN Exposed Pad
- Datasheet:
-
STOD03ATPUR.pdf
- Description:
- IC REG AMOLED DISPLAY 2OUT 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,456
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Product details
Overview
STOD03ATPUR from STMicroelectronics is a dual DC-DC converter IC designed specifically for active-matrix AMOLED display power supplies, integrating a synchronous step-up converter (4.6 V fixed output) and a programmable inverting converter (–2.4 V to –5.4 V), operating from 2.3 V to 4.5 V input, delivering up to 200 mA per rail with 85% typical efficiency at 1.5 MHz switching frequency.
For engineers reviewing the STOD03ATPUR datasheet, STOD03ATPUR pinout, STOD03ATPUR application, or STOD03ATPUR equivalent, this device is selected for compact, high-efficiency dual-rail bias generation in battery-powered portable displays where SWIRE-programmable negative voltage, fast discharge, thermal protection, and true shutdown (<1 µA IQ) are critical design requirements.
Technical Context
The STOD03ATPUR implements two independent synchronous DC-DC controllers: a boost stage with average current-mode control and fixed 4.6 V output, and an inverting stage with digitally programmable output via SWIRE protocol (31 discrete voltage levels in 100 mV steps). Both converters use pulse-skipping mode at light load and transition to constant-frequency PWM mode (1.2–1.7 MHz) under medium/high load.
It features integrated undervoltage lockout (UVLO_H = 2.25 V), overtemperature protection (OTP = 140 °C, hysteresis = 15 °C), soft-start with inrush limiting, and fast discharge (RDIS = 400 Ω, TDIS = 8 ms). The SWIRE interface operates at CMOS/TTL logic levels (0.6 V low / 1.2 V high) without external clock or handshake, enabling MCU-based dynamic voltage tuning of VO2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3 V to 4.5 V - supports single-cell Li-ion/Li-poly battery operation across full discharge curve. |
| Positive Output Voltage | 4.6 V ±0.05 V - tightly regulated fixed rail for AMOLED anode supply, ±0.5% temperature accuracy. |
| Negative Output Voltage | –2.4 V to –5.4 V in 31 steps - SWIRE-programmable cathode bias, default –4.9 V with ±0.07 V total variation. |
| Max Output Current | 200 mA per rail - sufficient for mid-size AMOLED panels with peak pixel drive requirements. |
| Switching Frequency | 1.5 MHz typical - enables use of small 4.7 µH inductors and 0805/0402 ceramic capacitors. |
| Efficiency | 85% typical at 30–150 mA - achieved via synchronous rectification on both converters, reducing conduction loss. |
| Shutdown Current | <1 µA - true-shutdown mode eliminates battery drain during display off-state. |
| Thermal Protection | 140 °C trip with 15 °C hysteresis - prevents thermal runaway in sealed portable enclosures. |
Pinout & Package
STOD03ATPUR is housed in a thermally enhanced DFN12L package (3 mm × 3 mm, 0.6 mm height) with exposed pad internally connected to AGND and requiring PCB connection to both AGND and PGND for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1 | Step-up switching node | Connects to inductor L1; carries high di/dt current; requires short, low-inductance trace routing. |
| PGND | Power ground | High-current return path for both converters; must be tied to exposed pad and CIN ground. |
| VMID | Step-up output | Stable 4.6 V rail for AMOLED anode; bypassed externally with 4.7 µF ceramic capacitor. |
| NC | No connect | Not bonded internally; must remain unconnected on PCB. |
| AGND | Analog ground | Reference for VREF, SWIRE, EN; routed separately from PGND and joined only at CREF ground. |
| VREF | Internal reference output | 1.22 V ±0.012 V reference; requires 1 µF ceramic bypass to AGND for stability. |
| SWIRE | Single-wire programming interface | Digital control pin for setting VO2; accepts CMOS/TTL pulses; no external pull-up required. |
| EN | Enable control | Active-high logic input; pulls device into <1 µA shutdown when low; must be AGND for SWIRE-only control. |
| VO2 | Inverting output | Programmable negative rail (default –4.9 V); fast-discharged after shutdown via internal 400 Ω resistor. |
| LX2 | Inverting switching node | Connects to inductor L2; polarity inverted relative to LX1; same layout rules apply. |
| VINA | Analog supply input | Powers internal analog circuitry; decoupled separately from VINP to reduce noise coupling. |
| VINP | Power supply input | Main battery input for power stages; routed with low-impedance path to CIN and PGND. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification on both converters | Eliminates external Schottky diodes, reducing conduction loss and board area while improving efficiency by ~5–8% vs. asynchronous designs. |
| SWIRE programmable negative output | 31 discrete voltage levels (–2.4 V to –5.4 V) set via single-wire digital interface-no I²C/SPI required, saving MCU GPIO and PCB traces. |
| True shutdown with fast discharge | Shuts down all switching activity and actively discharges VMID/VO2 rails within 8 ms, preventing residual panel ghosting or leakage-induced image retention. |
| Multi-mode operation (PSM/DCM/CCM) | Automatically selects pulse-skipping, discontinuous, or continuous conduction based on load-maintains >80% efficiency from 5 mA to 200 mA per rail. |
| Integrated thermal and UVLO protection | Prevents damage during abnormal conditions: UVLO (2.25 V turn-on) avoids brownout instability; OTP (140 °C) disables converters until safe cooldown. |
Applications
| AMOLED Smartphone Display | Wearable OLED Panel |
|---|---|
|
Use Scenario: Powering 5.5-inch FHD AMOLED panel in LTE smartphone with dynamic brightness control and always-on-display mode. IC Role / Device Role / Timing Role: Dual-rail bias generator providing stable 4.6 V anode and SWIRE-adjustable cathode (–4.2 V to –4.9 V) for contrast optimization across ambient light conditions. Use Value: Enables real-time voltage tuning to minimize power consumption during AOD while maintaining pixel uniformity-reducing system-level power by up to 12% versus fixed-negative solutions. |
Use Scenario: Supplying 1.3-inch circular OLED display in fitness tracker with aggressive size and thermal constraints. IC Role / Device Role / Timing Role: Compact dual-converter delivering regulated 4.6 V and –4.5 V rails from single 3.6 V Li-ion cell, leveraging 1.5 MHz switching to shrink passive components. Use Value: Achieves full display functionality in <25 mm² PCB area (including passives), with <1 µA shutdown current extending battery life to 7 days in standby. |
| Digital Camera Viewfinder | Portable Medical Monitor |
|
Use Scenario: Driving high-brightness QVGA OLED viewfinder in DSLR-style camcorder with rapid on/off cycling. IC Role / Device Role / Timing Role: Fast-start dual converter with soft-start and fast discharge-ramping output rails in <10 ms and clearing residual charge in <8 ms after shutdown. Use Value: Eliminates visual artifacts (ghosting, streaking) during quick power toggling, meeting professional imaging response time requirements. |
Use Scenario: Biasing monochrome OLED status display in handheld ECG device requiring clinical-grade reliability and low leakage. IC Role / Device Role / Timing Role: Medical-grade power IC with overtemperature protection (140 °C trip), guaranteed –40 °C to +85 °C operation, and true-shutdown isolation. Use Value: Ensures display remains functional and safe across extended field use, with zero risk of battery drain compromising device readiness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail AMOLED bias applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65136RGTR | Fixed –5.0 V negative output; no SWIRE programmability; uses I²C interface for configuration. | Requires MCU I²C resources and additional level-shifting for 1.8 V logic; lacks fast discharge. | Preferred when fixed dual-rail simplicity outweighs dynamic voltage tuning needs and I²C is already available. |
| MAX17104ETJ+T | Higher 300 mA per rail; supports wider input (1.8–5.5 V); includes integrated gate drivers for OLED source drivers. | Targeted at larger panels with integrated timing controller; larger 5 mm × 5 mm TQFN package increases footprint. | Chosen for high-resolution AMOLEDs (>720p) needing higher current headroom and driver integration. |
Compared with TPS65136RGTR and MAX17104ETJ+T, STOD03ATPUR uniquely balances ultra-compact DFN12L packaging, SWIRE-based voltage agility, and sub-1 µA shutdown-making it optimal for space-constrained, dynamically tuned, battery-critical AMOLED systems where I²C overhead or larger footprints are unacceptable.
Availability
STOD03ATPUR is available at Aetrix Electronics and suitable for AMOLED smartphone displays, wearable OLED panels, and portable medical monitors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for STOD03ATPUR 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, specializing in power management, analog, microcontrollers, and sensor technologies for automotive, industrial, and consumer markets.
The STOD03A belongs to ST's AMOLED display power management IC product line, engineered specifically to replace discrete boost/inverter solutions in portable devices-prioritizing minimal external components, high efficiency across load range, and digital programmability for display optimization.
FAQ
What is the function of the SWIRE pin on STOD03ATPUR?
The SWIRE pin implements a single-wire digital interface that allows an external MCU to program the inverting converter's output voltage across 31 discrete levels from –2.4 V to –5.4 V in 100 mV steps. It uses self-clocked CMOS/TTL pulses (no external clock or handshake), operates over 2.5–4.5 V supply, and requires no pull-up resistor. When used, the EN pin must be held at AGND.
How does STOD03ATPUR achieve high efficiency at light loads?
STOD03ATPUR enters pulse-skipping mode (PSM) below ~30 mA load, where it skips switching cycles to maintain regulation while minimizing quiescent current. This reduces switching losses significantly compared to forced-PWM operation, sustaining >80% efficiency down to 5 mA per rail-critical for always-on-display and standby modes in portable devices.
Can STOD03ATPUR operate with input voltages below 2.3 V?
No. The absolute minimum operating input voltage is 2.3 V, enforced by an undervoltage lockout (UVLO) circuit with a 2.25 V turn-on threshold and 1.9 V turn-off hysteresis. Operation below 2.3 V is not guaranteed, and attempting to power the device below this level will cause automatic shutdown to protect regulation integrity and prevent erratic behavior.
What is the purpose of separate VINA and VINP pins?
VINA supplies only the internal analog circuitry (reference, comparators, logic), while VINP powers the high-current switching stages (LX1/LX2 drivers and MOSFETs). Separating these inputs minimizes noise coupling from power switching transients into sensitive analog blocks-ensuring stable VREF, accurate SWIRE communication, and precise output voltage regulation even under heavy dynamic load.
STOD03ATPUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 12-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Converter, AMOLED Display
- Voltage - Input:
- 2.3V ~ 4.5V
- Number of Outputs:
- 2
- Voltage - Output:
- 4.6V, -2.4V ~ -5.4V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (3x3)
STOD03ATPUR FAQ
1.How can I place an order for STOD03ATPUR through Aetrix?
Please submit a Request for Quotation (RFQ) for STOD03ATPUR 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 STOD03ATPUR reliable?
The price and inventory of STOD03ATPUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STOD03ATPUR is usually 5 days.
3.What payment methods are accepted for STOD03ATPUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STOD03ATPUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STOD03ATPUR?
STOD03ATPUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STOD03ATPUR 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 STOD03ATPUR?
For technical support, including STOD03ATPUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STOD03ATPUR requirements.
6.How does Aetrix verify that STOD03ATPUR is sourced from the original manufacturer or authorized distributors?
All STOD03ATPUR 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 STOD03ATPUR meets industry standards.
7.What is the process for return or replacement of STOD03ATPUR?
All STOD03ATPUR units undergo pre-shipment inspection (PSI). If there is an issue with STOD03ATPUR, 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 STOD03ATPUR part is unused and in its original packaging.
Return procedure for STOD03ATPUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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