UCC25800AQDGNQ1 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
UCC25800AQDGNQ1 is an automotive-grade resonant LLC controller from Texas Instruments for isolated DC-DC converter designs. Features voltage-mode pulse-frequency modulation, 9V to 34V input range, and AEC-Q100 Grade 1 qualification in an 8-pin SOIC package. Available from $3.50 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- UCC25800AQDGNQ1 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.0794(MOQ 560)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- AEC-Q100 Grade 1 automotive qualification ensures reliable operation from -40°C to 125°C junction temperature in harsh vehicle environments
- Pulse-frequency modulation (PFM) voltage-mode control optimizes resonant LLC converter efficiency across the full 9V to 34V input range
- Integrated half-bridge gate drive with dead-time control simplifies resonant converter design in compact 8-pin SOIC footprint
Applications
UCC25800AQDGNQ1 targets automotive on-board chargers, DC-DC converters for 48V to 12V battery systems, and EV auxiliary power modules requiring AEC-Q100 qualification. Its resonant LLC topology enables zero-voltage switching across the full load range, reducing switching losses and EMI in high-frequency converters operating above 100 kHz. The 9V to 34V input range also accommodates post-regulation stages in 12V and 24V vehicle electrical systems including infotainment, ADAS, and powertrain control unit power supplies.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE FREQUENCY MODULATION |
| Input Voltage-Max | 34V |
| Input Voltage-Min | 9V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 1A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Screening Level | AEC-Q100 |
| Supply Current-Max (Isup) | 20mA |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 1200kHz |
| Terminal Finish | Nickel/Palladium/Gold/Silver (Ni/Pd/Au/Ag) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC25800AQDGNQ1:
Switching Regulator, Voltage-mode, 1A, 1200kHz Switching Freq-Max, PDSO8
Frequently Asked Questions
What input voltage range does UCC25800AQDGNQ1 support, and which automotive bus voltages is it compatible with?
UCC25800AQDGNQ1 operates with a controller supply input from 9V to 34V, making it directly compatible with 12V and 24V automotive electrical systems including cold-crank conditions where the bus drops to 9V. For 48V mild-hybrid architectures, an upstream pre-regulator drops the 48V bus to under 34V before feeding the UCC25800A stage. The wide input range also tolerates load-dump transients common in commercial vehicle 24V networks without triggering overvoltage shutdown.
How does pulse-frequency modulation in UCC25800AQDGNQ1 improve LLC resonant converter efficiency compared to fixed-frequency PWM control?
Pulse-frequency modulation adjusts the switching frequency rather than duty cycle to regulate output voltage, keeping the LLC tank circuit near resonance across a wide load range. At light loads, PFM reduces frequency toward resonance, maintaining zero-voltage switching (ZVS) and cutting switching losses by up to 40% compared to a fixed 200 kHz PWM controller that loses ZVS below 30% load. This efficiency advantage extends battery range in EV auxiliary loads and reduces heatsink requirements in under-hood power modules operating at 125°C ambient.
What automotive qualification standard does UCC25800AQDGNQ1 meet and what temperature range does it cover?
UCC25800AQDGNQ1 is qualified to AEC-Q100 Grade 1, covering a junction temperature range of -40°C to 125°C. Grade 1 is required for under-hood automotive applications such as powertrain ECUs, transmission controllers, and motor drive modules where ambient temperatures regularly exceed 85°C. The JEDEC qualification testing includes high-temperature operating life (HTOL) at 125°C for 1000 hours and temperature cycling between -55°C and 150°C, ensuring decade-long vehicle service life.
For a 48V to 12V automotive DC-DC converter, how does UCC25800AQDGNQ1 integrate into a half-bridge LLC topology?
UCC25800AQDGNQ1 drives both high-side and low-side MOSFETs of a half-bridge LLC stage through its integrated gate-drive outputs with programmable dead time, typically set to 200ns to ensure ZVS across load variations. The resonant tank is formed by the transformer leakage inductance (typically 30µH to 60µH) and series capacitor tuned to the 150 kHz to 400 kHz nominal switching range. Output regulation feedback from a 12V secondary rail adjusts the PFM frequency via an optocoupler to the error amplifier, completing the isolated feedback loop within an 8-pin SOIC controller footprint.
Related Guides
How to Choose a 3528 SMD Indicator LED for Blue Status Lighting: Selection Guide
A practical 3528 SMD indicator LED selection guide using 150141BS73100 and related Wurth 150141 variants for blue status lighting.
Jul 5, 2026
BAS70KFILM Design Guide for Low-Leakage Signal Clamping and RF Detector Inputs
Practical BAS70KFILM design guidance for signal clamps, RF detector inputs, leakage control, capacitance, layout, and sourcing alternatives.
Jul 5, 2026
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 560+ | $3.2405 | $1814.71 |
| 1040+ | $3.1665 | $3293.17 |
| 2560+ | $3.0793 | $7883.14 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”