Texas Instruments UC1526 UC2526 UC3526 Data Manual (1) User Guide
Summary
These high-performance monolithic pulse width modulators (UC1526, UC2526, and UC3526) are designed for robust fixed-frequency switching regulator applications. The versatile modules offer wide operational voltage ranges (up to 35V), along with advanced protection features such as soft-start, under-voltage lockout, and adjustable deadtime. Featuring TTL/CMOS compatible logic ports, they support both single-ended and push-pull switching configurations. Ideal for engineers requiring reliable power regulation across extreme temperature conditions, these modulators ensure maximum flexibility and high efficiency in diverse electronic systems.
Page 1 Text Content
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UC1526 UC2526 UC3526
Regulating Pulse Width Modulator FEATURES DESCRIPTION 8 To 35V Operation The UC1526 is a high performance monolithic pulse width modulator
circuit designed for fixed-frequency switching regulators and other
5V Reference Trimmed To ±1%
power control applications. Included in an 18-pin dual-in-line pack- 1Hz To 400k Hz Oscillator Range age are a temperature compensated voltage reference, sawtooth os- cillator, error amplifier, pulse width modulator, pulse metering and
Dual 100m A Source/Sink Outputs
setting logic, and two low impedance power drivers. Also included Digital Current Limiting are protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a data latch for single
Double Pulse Suppression
pulse metering, adjustable deadtime, and provision for symmetry cor- Programmable Deadtime rection inputs. For ease of interface, all digital control ports are TTL and B-series CMOS compatible. Active LOW logic design allows
Under-Voltage Lockout
wired-OR connections for maximum flexibility. This versatile device Single Pulse Metering can be used to implement single-ended or push-pull switching regu- lators of either polarity, both transformerless and transformer cou-
Programmable Soft-Start
pled. The UC1526 is characterized for operation over the full military Wide Current Limit Common Mode Range temperature range of -55°C to +125°C. The UC2526 is characterized for operation from -25°C to +85°C, and the UC3526 is characterized
TTL/CMOS Compatible Logic Ports
for operation from 0° to +70°C.
Symmetry Correction Capability Guaranteed 6 Unit Synchronization
BLOCK DIAGRAM
Page Summary Contents For Texas Instruments UC1526 UC2526 UC3526 Data Manual (1) User Guide
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 12 |
| File Size | 539.13 KB |
| Published | July 10, 2026 |
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Frequently Asked Questions
Which device operates over the full military temperature range?
The UC1526 is characterized for operation over the full military temperature range of -55°C to +125°C.
What protective features does this modulator include?
It includes soft-start, under-voltage lockout, digital current limiting, double pulse inhibit, and adjustable deadtime.
What is the usable oscillator frequency range?
The oscillator range spans from 1Hz to 400kHz.
Is the device compatible with various logic levels and inputs?
Yes, all digital control ports are TTL and B-series CMOS compatible, supporting single or push-pull configurations.