UCC2803PWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments UCC2803PWG4 is a low-power BiCMOS current-mode PWM switching controller operating from 4 V to 12 V supply in an 8-pin SOIC package. Provides cycle-by-cycle current limiting, soft-start, and undervoltage lockout for reliable power supply designs. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- UCC2803PWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control with cycle-by-cycle current limiting for inherent short-circuit protection
- Low startup current under 1 mA enabling energy-efficient power supply designs from 4 V to 12 V input
- Integrated soft-start, undervoltage lockout (UVLO), and oscillator in a compact 8-pin SOIC package
- BiCMOS technology for low quiescent current and high-speed gate drive performance up to 1 MHz
Applications
UCC2803PWG4 is primarily used in low-power offline flyback converters, DC-DC converters, and battery-powered equipment power management circuits where minimizing standby consumption is critical. Its current-mode control architecture simplifies compensation and provides inherent feed-forward line rejection, making it ideal for isolated power supplies in industrial controls, telecom auxiliary rails, and smart meter power stages. The device also suits auxiliary power supplies in motor drives and UPS systems requiring a 4 V to 12 V bias rail.
Specifications
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 12V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 10V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Output Voltage-Max | 4.06V |
| Output Voltage-Min | 3.94V |
| Output Voltage-Nom | 4V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 30mA |
| Supply Voltage-Nom (Vsup) | 10V |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 1000kHz |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| 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 | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC2803PWG4:
Switching Controller, Current-mode, 1A, 1000kHz Switching Freq-Max, BICMOS, PDSO8
Switching Controller, Current-mode, 1A, 1000kHz Switching Freq-Max, BICMOS, PDSO8
Frequently Asked Questions
What input voltage range and control mode does UCC2803PWG4 support in switching power supply designs?
The UCC2803PWG4 operates from a 4 V to 12 V supply rail with a nominal operating point at 10 V. It uses current-mode PWM control, which provides cycle-by-cycle peak current limiting and simplified single-pole error amplifier compensation compared to voltage-mode controllers, making it a reliable choice for flyback and forward converter topologies up to several tens of watts.
How does the low startup current of UCC2803PWG4 benefit battery-powered or energy-efficient designs?
UCC2803PWG4's BiCMOS design achieves a startup current typically below 1 mA, which significantly reduces power lost in high-value startup resistors in offline designs. This feature extends battery life in UPS auxiliary supplies and reduces no-load power consumption in smart meters and IoT gateway power stages below the 0.3 W standby threshold required by Energy Star standards.
What protection features are integrated into UCC2803PWG4 and at what switching frequency can it operate?
The UCC2803PWG4 integrates undervoltage lockout (UVLO), soft-start to limit inrush current during startup, and cycle-by-cycle current limiting for overload protection. The internal oscillator supports switching frequencies up to 1 MHz, allowing use of smaller magnetic components — for example, a flyback transformer core below 10 mm in diameter — in compact power supply modules.
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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.
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