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STMicroelectronics STOD1412PMR
- Part No.:
- STOD1412PMR
- Manufacturer:
- STMicroelectronics
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
STOD1412PMR.pdf
- Description:
- IC REG BOOST ADJ 900MA DL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,900
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Product details
Overview
STOD1412PMR from STMicroelectronics is a dual-output synchronous DC-DC converter IC integrating one step-up (boost) and one inverting converter, operating from 2.7 V to 5.5 V input. It delivers up to +6.0 V (4.3–6.0 V adjustable) and –8.0 V (–8.0 to –2.0 V adjustable) outputs with 120 mA max per channel, 1.3 MHz fixed-frequency PWM control, and <1 µA shutdown current-designed for active matrix OLED display power rails in portable devices.
For engineers reviewing the STOD1412PMR datasheet, STOD1412PMR pinout, STOD1412PMR application, or STOD1412PMR equivalent, key selection criteria include dual-rail voltage adjustability, synchronous rectification efficiency (85% at 30–120 mA), integrated overtemperature and current limiting, and QFN16L (3 × 3 mm) package compatibility with space-constrained battery-powered systems.
Technical Context
The STOD1412PMR implements two independent fixed-frequency (1.3 MHz) PWM controllers-one for boost and one for inverting topology-each using peak-current-mode control with internal error amplifiers, reference voltages (VFB1 = 1.20 V, VFB2 = –0.5 mV), and dedicated feedback pins (FB1, FB2). Both converters feature soft-start, inrush current limiting, and load disconnect during shutdown.
It integrates undervoltage lockout (UVLO_H = 2.55 V, hysteresis = 50 mV), thermal shutdown (140 °C), and dual-stage current limiting (IL1-MAX = 0.9 A, IL2-MAX = 1 A). The device supports external resistor-based output voltage programming and requires only one inductor and two capacitors per channel for full operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion and multi-cell alkaline battery inputs without pre-regulation. |
| Output Voltage Ranges | +4.3 V to +6.0 V (boost); –8.0 V to –2.0 V (inverting) - independently adjustable via external resistor dividers for dual-rail AM-OLED biasing. |
| Max Output Current | 120 mA per channel - sufficient to drive gate drivers and pixel bias circuits in small-to-mid-size OLED panels. |
| Switching Frequency | 1.3 MHz - enables use of compact 4.7 µH and 6.8 µH inductors, reducing board area and EMI filter complexity. |
| Efficiency | 85% at 30–120 mA load - minimizes thermal rise and extends battery runtime in always-on display subsystems. |
| Shutdown Current | <1 µA - preserves battery charge during display sleep or system standby modes. |
| Operating Temperature | –40 °C to +85 °C - qualified for consumer handheld and industrial portable equipment environments. |
Pinout & Package
Package: QFN16L (3 × 3 mm, 0.5 mm pitch), thermally enhanced with exposed pad connected to VO2 (pin 14).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VO1 | Boost output voltage node | Positive regulated output; connects to output capacitor and load (e.g., OLED VDD). |
| 5 FB1 | Boost feedback input | Senses VO1 via R1/R2 divider; sets regulation point at 1.20 V reference. |
| 8 FB2 | Inverting feedback input | Senses VO2 via R3/R4 divider; regulates negative output at –0.5 mV reference. |
| 9 VI | Main input supply | Primary power input (2.7–5.5 V); decoupled with 2.2 µF ceramic capacitor. |
| 10 EN | Enable control | Active-high logic input; pulls low to enter true shutdown (<1 µA IQ). |
| 12 VCC | Power supply input | Secondary input rail; must be tied to VI or local LDO output for stable biasing. |
| 13 Lx2 | Inverting switch node | Connects to inductor L2 and internal high-side/N-channel switches; requires low-inductance layout. |
| 14 VO2 | Inverting output voltage | Negative regulated output; exposed pad must be soldered to this net for thermal conduction. |
| 15 PGND | Power ground | High-current return path for both converters; star-grounded separately from signal GND (pin 7). |
| 16 Lx1 | Boost switch node | Connects to inductor L1 and internal boost switches; critical for EMI and efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulation | Separate FB1/FB2 pins enable simultaneous +VO1 and –VO2 adjustment without cross-coupling. |
| Synchronous rectification | Integrated N/P-channel MOSFETs eliminate external diodes, improving efficiency by ~10% vs. asynchronous designs. |
| True shutdown mode | EN pin disables both converters and disconnects input-to-output paths, eliminating leakage through feedback resistors. |
| Integrated reference voltage | VREF pin provides stable 1.209 V (±1.5%) reference for precise VO2 setting and external circuitry. |
| Overtemperature protection | Thermal shutdown at 140 °C with 15 °C hysteresis prevents damage during sustained overload or poor heatsinking. |
Applications
| AM-OLED Display Power | Portable Camera Module |
|---|---|
|
Use Scenario: Powering gate driver and pixel bias rails in 2.4-inch active matrix OLED displays used in smartwatches and wearables. IC Role / Device Role / Timing Role: Dual-rail DC-DC converter generating +5.5 V (VDD) and –5.0 V (VSS) from a single 3.7 V Li-ion cell. Use Value: Eliminates need for discrete boost + inverter ICs, reducing BOM count by 2 and PCB area by >35%. |
Use Scenario: Supplying CCD/CMOS sensor analog bias and digital core voltage in ultra-compact camcorders. IC Role / Device Role / Timing Role: Generating +4.5 V for sensor interface and –3.3 V for analog front-end from 3.3 V system rail. Use Value: Enables fast startup (<5 ms) with soft-start and maintains ±2% load regulation across 10–100 mA dynamic current steps. |
| Mobile Phone Subsystem | Digital Still Camera Backlight |
|
Use Scenario: Providing auxiliary voltages for RF front-end modules and touch controller in LTE smartphones. IC Role / Device Role / Timing Role: Delivering +6.0 V for PA bias and –2.5 V for LNA tuning from shared 4.2 V battery rail. Use Value: Achieves 85% efficiency at 60 mA load, reducing thermal contribution to <0.3 W in thermally constrained mid-frame zones. |
Use Scenario: Driving white LED strings requiring positive and negative bias in DSLR camera LCD viewfinders. IC Role / Device Role / Timing Role: Supplying +5.0 V for LED anode and –4.0 V for cathode current sink configuration. Use Value: Supports 100 kHz PWM dimming without output ripple coupling due to 1.3 MHz switching frequency separation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1759EUB+ | Single inverting output only; no integrated boost stage; requires external inductor for each rail. | Limited to negative-only bias generation; cannot replace STOD1412PMR's dual-rail capability in OLED systems. | Select only when only inverting output is needed and board space allows separate boost solution. |
| TPS65131RGTR | Higher max current (200 mA per rail); wider input range (2.7–5.5 V); but no true shutdown (<1 µA). | Better suited for larger OLED panels; lacks sub-µA quiescent current required for long standby in wearables. | Prefer for high-current AMOLEDs where shutdown IQ is secondary to output capability. |
Compared with MAX1759EUB+ and TPS65131RGTR, the STOD1412PMR uniquely combines dual-rail adjustability, true shutdown, and QFN16L footprint in one IC-making it optimal for space- and battery-life-constrained portable OLED applications where neither alternative fully substitutes its integrated functionality.
Availability
STOD1412PMR is available at Aetrix Electronics and suitable for active matrix OLED power supplies, portable camera modules, and mobile phone subsystems requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for STOD1412PMR 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 analog, mixed-signal, power, and microcontroller solutions for automotive, industrial, and consumer markets.
The STOD1412 belongs to ST's Power Management IC product line, engineered specifically for compact, high-efficiency dual-rail power conversion in battery-powered portable displays and imaging systems.
FAQ
What is the recommended inductor value for the boost converter?
The datasheet specifies a 4.7 µH inductor (L1) for the step-up converter under typical conditions. This value ensures continuous conduction mode across the full input (2.7–5.5 V) and load (0–120 mA) range while maintaining <20 mV output ripple. Inductor saturation current must exceed 0.9 A peak, and DCR should be ≤150 mΩ to preserve efficiency.
Can STOD1412PMR operate with only the inverting converter enabled?
Yes-the boost and inverting converters operate independently. Pulling EN high enables both, but the inverting converter continues regulating VO2 even if FB1 is left unconnected or VO1 is unloaded. However, VI and VCC must remain powered, and unused feedback pins (FB1) should be terminated per layout guidelines to avoid instability.
How is the exposed thermal pad on the QFN16L package connected?
The exposed pad (Exp pad) must be soldered directly to VO2 (pin 14), not to GND or PGND. This connection serves dual purposes: it provides the primary thermal conduction path to the PCB and forms part of the inverting converter's output return path. A minimum 4×4 mm thermal pad with ≥4 vias to inner ground planes is recommended for optimal thermal performance.
Does STOD1412PMR support dynamic output voltage adjustment during operation?
No-it does not support real-time voltage reprogramming. Output voltages are set statically via external resistor dividers (R1/R2 for VO1; R3/R4 for VO2) referenced to fixed internal feedback thresholds (1.20 V and –0.5 mV). Changing VO1 or VO2 requires physical resistor replacement; no I²C, SPI, or analog control interface is provided.
STOD1412PMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive and Negative (Dual Rail)
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 4.3V, -2V
- Voltage - Output (Max):
- 6V, -8V
- Current - Output:
- 900mA (Switch)
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
STOD1412PMR FAQ
1.How can I place an order for STOD1412PMR through Aetrix?
Please submit a Request for Quotation (RFQ) for STOD1412PMR 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 STOD1412PMR reliable?
The price and inventory of STOD1412PMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STOD1412PMR is usually 5 days.
3.What payment methods are accepted for STOD1412PMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STOD1412PMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STOD1412PMR?
STOD1412PMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STOD1412PMR 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 STOD1412PMR?
For technical support, including STOD1412PMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STOD1412PMR requirements.
6.How does Aetrix verify that STOD1412PMR is sourced from the original manufacturer or authorized distributors?
All STOD1412PMR 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 STOD1412PMR meets industry standards.
7.What is the process for return or replacement of STOD1412PMR?
All STOD1412PMR units undergo pre-shipment inspection (PSI). If there is an issue with STOD1412PMR, 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 STOD1412PMR part is unused and in its original packaging.
Return procedure for STOD1412PMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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