UC1525AJ883B Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
UC1525AJ883B is a voltage-mode PWM switching controller IC operating from 8 V to 35 V input, rated for -55°C to +125°C in a 16-CDIP ceramic package. Provides adjustable dead time, soft-start, and dual 200 mA totem-pole outputs for push-pull or full-bridge topologies. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- UC1525AJ883B Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Voltage-mode PWM controller operating from 8 V to 35 V input with oscillator frequency programmable from 100 Hz to 500 kHz via a single RC network
- Military-grade 16-CDIP ceramic package rated from -55°C to +125°C meeting MIL-PRF-38535 screening for aerospace and defense power supply designs
- Dual 200 mA totem-pole output drivers with programmable dead time (0–3.5 µs) supporting push-pull, half-bridge, and full-bridge converter topologies
- Integrated soft-start and shutdown control with cycle-by-cycle current limiting for robust protection in high-reliability power conversion applications
- Internal 5.1 V reference (1% accuracy) and precision oscillator enabling stable duty-cycle control without external precision components
Applications
The UC1525AJ883B is a high-reliability PWM controller designed for military, aerospace, and industrial power supply applications that demand operation over the full -55°C to +125°C temperature range. Its voltage-mode control, adjustable dead time, and dual high-current output drivers make it a natural fit for push-pull DC-DC converters, full-bridge inverters, and transformer-isolated supplies in avionics, satellite power buses, and rugged ground-vehicle electronics. The ceramic CDIP package and MIL-spec screening also make it the preferred choice for mission-critical systems where component long-term availability (YTEOL 15 years) and thermal stability are mandatory procurement requirements.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 35V |
| Input Voltage-Min | 8V |
| Input Voltage-Nom | 20V |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 0.5A |
| Output Voltage-Max | 5.15V |
| Output Voltage-Min | 5.05V |
| Output Voltage-Nom | 5.1V |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Screening Level | MIL-STD-883 Class B |
| Supply Current-Max (Isup) | 20mA |
| Supply Voltage-Max (Vsup) | 8V |
| Surface Mount | NO |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 500kHz |
| Technology | BIPOLAR |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| ## UC1525AJ883B Alternates Showing results | Image |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC1525AJ883B:
Switching Controller, Voltage-mode, 0.5A, 400kHz Switching Freq-Max, PDIP16
suggested
suggested
suggested
Frequently Asked Questions
What input voltage range and oscillator frequency does UC1525AJ883B support for DC-DC converter designs?
UC1525AJ883B accepts an input supply voltage of 8 V to 35 V, with a nominal operating point of 20 V. The internal oscillator frequency is set by an external resistor and capacitor and is programmable from approximately 100 Hz to 500 kHz, giving the designer flexibility to optimize switching losses, transformer size, and EMI profile across a wide range of converter power levels and topologies.
How does the dual output driver of UC1525AJ883B enable push-pull or full-bridge converter implementations?
The UC1525AJ883B provides two complementary totem-pole output drivers, each capable of sourcing or sinking 200 mA peak current. The outputs alternate at half the oscillator frequency with a programmable dead time of 0 to 3.5 µs set by an external resistor, preventing simultaneous conduction in a push-pull or full-bridge stage. This integrated dead-time control eliminates the need for discrete timing circuits and reduces transformer core saturation risk in center-tapped topologies.
What temperature rating and package type qualify UC1525AJ883B for military and aerospace power supply applications?
UC1525AJ883B is housed in a 16-lead ceramic DIP (CDIP) package with hermetically sealed construction, operating from -55°C to +125°C across the full military temperature range. The J883B suffix indicates compliance with MIL-STD-883 test methods, including thermal shock, moisture resistance, and burn-in screening. These characteristics make the device acceptable for use in avionics, satellite bus regulators, and shipboard electronics where commercial plastic packages would fail.
Does UC1525AJ883B include soft-start and overcurrent protection features to protect converter circuits during startup?
Yes, the UC1525AJ883B incorporates a soft-start function controlled by a single external capacitor connected to the SS pin. Charging the capacitor over 1 ms to 10 ms ramps the PWM duty cycle gradually from 0% to the steady-state value, limiting inrush current and preventing transformer saturation at startup. An additional shutdown input pin allows cycle-by-cycle current limiting through external sense resistors, clamping peak inductor currents to a programmable threshold below 1 V to protect switches and magnetics.
When should a designer choose UC1525AJ883B over a commercial UC3525A for a power supply design?
UC1525AJ883B is the correct choice when the application operates below -40°C or above +85°C, requires hermetic ceramic packaging for moisture-sensitive environments such as undersea or spacecraft, or demands MIL-STD-883 qualification traceability for a defense contract. The UC3525A covers 0°C to +70°C in a plastic DIP and costs significantly less, so commercial or industrial designs with benign thermal profiles should use the UC3525A to reduce BOM cost by typically 10× to 50× per unit.
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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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