UC3526J Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The UC3526J is a voltage-mode PWM controller IC from Texas Instruments operating from 7 V to 35 V with up to 650 kHz switching frequency and 100 mA gate drive output current in an 18-pin CDIP ceramic package. It features deadtime control, soft-start, and shutdown functions for complete switching power supply control. Suited for isolated forward converters, push-pull topologies, and high-reliability industrial power supplies.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- UC3526J Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UC3526J?
- Voltage-mode PWM control with up to 650 kHz switching frequency for compact magnetics
- 100 mA totem-pole output drivers for direct MOSFET gate drive capability
- 7 V to 35 V wide input voltage range covers a broad set of industrial power rails
- Programmable deadtime control prevents shoot-through in push-pull and full-bridge topologies
- Soft-start function limits inrush current and output voltage overshoot at power-up
- 18-pin CDIP ceramic package for high-reliability and military-grade application environments
What is UC3526J used for?
The UC3526J is a classic PWM controller used in push-pull and half-bridge switching power supply topologies where voltage-mode control and precise deadtime adjustment are required. Its ceramic DIP package makes it a strong candidate for high-reliability industrial, defense, and avionics power converter designs that must withstand harsh thermal and mechanical environments. Engineers also use it in DC/DC converter modules targeting 15 V to 28 V input bus applications in telecommunications and ruggedized embedded systems.
What are the specifications of UC3526J?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | LG-MAX |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 35V |
| Input Voltage-Min | 7V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | R-CDIP-T18 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 0.2A |
| Output Voltage-Max | 5.1V |
| Output Voltage-Min | 4.9V |
| Output Voltage-Nom | 5V |
| Package Body Material | CERAMIC, METAL-SEALED COFIRED |
| Package Equivalence Code | DIP18,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 35V |
| Supply Voltage-Min (Vsup) | 8V |
| Surface Mount | NO |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 400kHz |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the UC3526J datasheet?
UC3526J Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC3526J?
Compatible alternatives and drop-in replacements for UC3526J:
Switching Controller, Voltage-mode, 0.2A, 600kHz Switching Freq-Max, CMOS, PDIP18
Switching Controller, Voltage-mode, 0.2A, 400kHz Switching Freq-Max, CMOS, PDIP18
Switching Controller, Voltage-mode, 0.2A, 400kHz Switching Freq-Max, CMOS, PDIP18
Frequently Asked Questions
What switching frequency range does the UC3526J support, and how does that affect transformer design?
The UC3526J supports switching frequencies up to 650 kHz, allowing designers to use small high-frequency transformers and inductors. At 300 kHz, a push-pull transformer for a 15 V input to 5 V output at 20 W can use a core as small as an EE16, compared to a bulky EE30 required at 50 kHz, significantly reducing converter size and weight.
Why is the ceramic CDIP package of the UC3526J preferred in military and avionics power supplies?
The 18-pin CDIP ceramic package provides hermetic sealing that protects against moisture ingress, temperature cycling from -55°C to 125°C, and vibration far beyond what plastic PDIP packages can withstand. In avionics and military applications where MIL-STD-883 compliance is required, the ceramic package of the UC3526J ensures long-term reliability under extreme environmental conditions that plastic alternatives cannot match.
How does the deadtime control feature of the UC3526J protect the power stage in a push-pull converter?
The programmable deadtime control in the UC3526J inserts a non-overlap period between the two complementary PWM output signals, preventing both power switches from conducting simultaneously and causing shoot-through. By setting the deadtime to match the MOSFET turn-off delay (typically 50 ns to 200 ns), designers eliminate cross-conduction current spikes that would otherwise stress the switches and reduce efficiency in push-pull and full-bridge converters.
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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.
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