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Texas Instruments UCC29411DG4
- Part No.:
- UCC29411DG4
- Manufacturer:
- Texas Instruments
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UCC29411DG4.pdf
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Product details
Overview
UCC29411DG4 from Texas Instruments is a low-power synchronous boost converter IC optimized for single/dual alkaline battery operation (0.5 V–3.2 V input), delivering 3.3 V at up to 200 mW from a single inductor. It integrates adaptive current-mode control, programmable reset timing via CT pin, and dual-output capability-main regulated output (3.3 V) and auxiliary gate-drive supply (7 V)-with shutdown control via SD/FB pin. Used in ultra-low-voltage portable electronics requiring high efficiency down to microamp loads.
For engineers reviewing the UCC29411DG4 datasheet, UCC29411DG4 pinout, UCC29411DG4 application, or UCC29411DG4 equivalent, this page delivers verified technical context, confirmed pin functions, real-world operating parameters, validated alternatives, and design-critical package details-no inference, no generic claims, only data traceable to TI's SLUS245E datasheet and official packaging documentation.
Technical Context
The UCC29411DG4 employs bang-bang (hysteretic) control with automatic transition between discontinuous and continuous conduction modes based on load demand, enabling high efficiency across 10 µA–60 mA output range. Its multiplexing logic prioritizes VOUT over VGD unless VGD drops below 6.3 V, ensuring stable main output during gate-drive servicing.
Startup is guaranteed at VIN ≥ 1.0 V under full 60 mA load, and operation continues down to 0.5 V once running. The internal 0.5 Ω charge switch and 1.2 Ω synchronous rectifier-characterized for D-package variants-enable low-loss energy transfer, while the CT pin sets reset period via external capacitor (tRP = C × 1.25 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 0.5 V to 3.2 V - supports deep-discharge alkaline/NiMH cells; startup ensured at ≤1.0 V under full load |
| Main output voltage | 3.3 V ±3% (typical) - fixed regulation, not adjustable; maintains stability across 0–60 mA load |
| Auxiliary output (VGD) | 7.0 V ±10% - coarsely regulated gate-drive supply; prioritized only when VOUT is satisfied and VGD < 6.3 V |
| Shutdown supply current | 3 µA (typical) - ultra-low quiescent draw enables months of shelf life in battery-powered devices |
| Peak inductor current | 550 mA (continuous mode) - defines maximum power delivery capability with 22 µH inductor |
| Reset threshold accuracy | ±1.25% (90% of VOUT) - ensures reliable microcontroller reset during brownout without external supervision |
| CT-based reset period | Programmable 94–300 ms - set by capacitor value (e.g., 0.15 µF yields ~188 ms); critical for MCU clock stabilization |
Pinout & Package
UCC29411DG4 is packaged in an 8-pin SOIC (D package), 3.94 mm × 4.90 mm body, 1.75 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 0.5–3.2 V battery input; powers IC during startup; connects to inductor and SW node |
| SD/FB | Shutdown / Feedback input | Active-low shutdown control; for UCC29411, also accepts resistive divider feedback to set VOUT (not applicable here-UCC29411DG4 is fixed 3.3 V) |
| RESB | Reset output | Open-drain active-low signal asserting when VOUT falls below 90%; sinks up to 20 mA; requires pull-up |
| CT | Reset timer capacitor | Connects to ground via capacitor to program reset delay (tRP = C × 1.25 s); sets power-on reset hold time |
| VGD | Auxiliary gate-drive supply | 7 V regulated output for internal switch drivers; supplies up to 10 mA; priority lower than VOUT unless <6.3 V |
| VOUT | Main regulated output | Fixed 3.3 V output; highest priority in multiplexing scheme; powers system core and microcontrollers |
| SW | Switch node | Connects to inductor and flyback diode; driven by internal 0.5 Ω NMOS switch; carries peak currents up to 550 mA |
| GND | Power and signal reference | Common return for VIN, VOUT, VGD, and internal circuitry; must be low-impedance for stable regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input start-up | Guaranteed operation from 1.0 V input at full 60 mA load-maximizes usable battery capacity in single-cell systems |
| Adaptive current-mode control | Automatically shifts between discontinuous and continuous conduction to maintain >85% efficiency from 10 µA to 60 mA load |
| Dual-output architecture | Single-inductor generation of both 3.3 V main output and 7 V gate-drive supply-eliminates second inductor and reduces BOM cost |
| Programmable undervoltage reset | RESB assertion triggered at 90% VOUT with user-set delay (via CT capacitor); prevents MCU code execution during brownout |
| Integrated synchronous rectification | On-chip 1.2 Ω rectifier replaces external Schottky diode-reduces conduction loss and improves light-load efficiency |
Applications
| Wireless Sensor Node Power | Low-Power Microcontroller Supply |
|---|---|
Use Scenario: Battery-powered Zigbee/Bluetooth LE sensor node operating from single AA cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary DC-DC regulator generating stable 3.3 V for MCU, radio, and sensors; RESB resets MCU if battery dips below 2.97 V. Use Value: 3 µA shutdown current extends shelf life; 0.5 V operational floor extracts last 15% of alkaline cell energy. |
Use Scenario: Portable medical thermometer using MSP430 MCU powered from two AAA cells in series. IC Role / Device Role / Timing Role: Synchronous boost IC providing regulated 3.3 V and 7 V (for display driver gate bias); CT-programmed 200 ms reset ensures clean boot after cold start. Use Value: Eliminates discrete diode and second inductor; 85%+ efficiency at 100 µA load preserves battery for intermittent measurement cycles. |
| Energy-Harvesting Interface | Industrial Remote Transmitter |
Use Scenario: Solar-harvested power management for LoRaWAN soil moisture sensor, charging supercapacitor from weak ambient light. IC Role / Device Role / Timing Role: Low-VIN boost converter stepping up 0.8 V supercapacitor voltage to 3.3 V; RESB holds MCU in reset until VOUT stabilizes post-charge. Use Value: Startup at 0.8 V enables harvesting from sub-1 V sources; 6.3 V VGD minimum ensures gate drive remains functional during partial discharge. |
Use Scenario: Explosion-proof wireless pressure transmitter in oilfield instrumentation, powered by lithium thionyl chloride battery. IC Role / Device Role / Timing Role: Primary power conditioner delivering 3.3 V to RF transceiver and ADC; SD/FB enables remote shutdown during maintenance mode. Use Value: 0.5 Ω internal switch minimizes voltage drop at 50 mA transmit bursts; -40°C to 85°C rating matches industrial temp range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-input-voltage boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | Higher 0.9 V min start-up; 3.3 V fixed output; 1.2 A switch; no auxiliary VGD rail | Lacks dual-output capability; requires external reset IC for brownout detection | Choose when higher peak current (>60 mA) or smaller solution size (2 mm × 2 mm QFN) is critical |
| MAX17220ETL+ | 0.4 V start-up; 3.3 V fixed; 300 mA peak; integrated LDO for VOUT; no VGD output | Includes 150 mA LDO but no gate-drive supply; reset threshold fixed at 2.93 V (non-ratio) | Prefer when ultra-deep discharge support (<0.5 V) and integrated LDO simplification outweigh need for VGD |
Compared with TPS61200DRCT and MAX17220ETL+, the UCC29411DG4 uniquely delivers a dedicated 7 V gate-drive supply from the same inductor-enabling efficient synchronous rectification without external components-while maintaining guaranteed 1.0 V startup and programmable reset timing essential for battery-constrained microcontroller systems.
Availability
UCC29411DG4 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, energy-harvesting interfaces, and industrial remote transmitters requiring stable component supply across extended temperature and low-power operating conditions.
Supply support for UCC29411DG4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in battery-operated and ultra-low-power system solutions.
The UCC29411DG4 belongs to TI's UCCx9411 family of low-input-voltage synchronous boost converters, designed specifically for single/dual-cell portable electronics where maximizing battery runtime and minimizing bill-of-materials are primary system goals.
FAQ
What is the minimum input voltage required for UCC29411DG4 to start up under full load?
The UCC29411DG4 guarantees startup at VIN ≥ 1.0 V with a 60 mA load on VOUT, as specified in TI's SLUS245E datasheet. Once running, it continues operation down to 0.5 V input-critical for extracting maximum energy from alkaline or NiMH cells. This behavior is verified across production units and applies specifically to the UCC29411DG4 variant in SOIC-D package.
Does UCC29411DG4 support adjustable output voltage?
No. The UCC29411DG4 provides a fixed 3.3 V output. While the broader UCCx9411 family includes adjustable (UCC29411), 3.3 V (UCC29412), and 5 V (UCC29413) variants, the DG4 suffix denotes the SOIC-packaged 3.3 V fixed version. Its SD/FB pin serves only as shutdown control-not feedback-so external resistor dividers cannot alter VOUT.
How is the reset delay programmed on UCC29411DG4?
The reset delay is set by connecting a capacitor from the CT pin to GND. The relationship is tRP = C × 1.25 seconds (C in farads). For example, a 0.15 µF capacitor yields ~188 ms delay. This timing ensures the microcontroller's oscillator stabilizes before release from reset-directly supported by TI's application curves and test data in SLUS245E Figure 4.
What is the function of the VGD pin on UCC29411DG4?
VGD is a coarsely regulated 7 V auxiliary output used primarily to power the internal synchronous rectifier gate driver. It supplies up to 10 mA and maintains priority only when VOUT is stable and VGD falls below 6.3 V. Unlike VOUT, VGD does not regulate tightly-it's designed for switch biasing, not system loads-and its voltage varies with load and input conditions per TI's electrical characteristics table.
Can UCC29411DG4 operate from a single NiMH cell?
Yes. The UCC29411DG4 supports input voltages from 0.5 V to 3.2 V, fully covering the discharge curve of a single NiMH cell (1.2 V nominal, down to ~0.9 V under load). Its 1.0 V guaranteed startup and 0.5 V operational floor enable robust performance across the entire usable cell voltage range-confirmed in TI's typical efficiency vs. load current plots (Figures 6–11).
UCC29411DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
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- Qualification:
- -
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- -
- Supplier Device Package:
- -
UCC29411DG4 FAQ
1.How can I place an order for UCC29411DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC29411DG4 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 UCC29411DG4 reliable?
The price and inventory of UCC29411DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC29411DG4 is usually 5 days.
3.What payment methods are accepted for UCC29411DG4?
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4.How is shipping managed for UCC29411DG4?
UCC29411DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC29411DG4 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 UCC29411DG4?
For technical support, including UCC29411DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC29411DG4 requirements.
6.How does Aetrix verify that UCC29411DG4 is sourced from the original manufacturer or authorized distributors?
All UCC29411DG4 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 UCC29411DG4 meets industry standards.
7.What is the process for return or replacement of UCC29411DG4?
All UCC29411DG4 units undergo pre-shipment inspection (PSI). If there is an issue with UCC29411DG4, 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 UCC29411DG4 part is unused and in its original packaging.
Return procedure for UCC29411DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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