PWM controller for buck and boost regulation
The Texas Instruments LM3524DM/NOPB is a PWM controller IC designed for both step-up (boost) and step-down (buck) switching regulator topologies. It integrates the control logic and a single transistor driver output on a single chip, operating from a supply rail of 8V to 40V. This makes it a fit for a range of non-isolated DC-DC converter designs in industrial and commercial power supplies, where a single controller must handle either topology without a major board respin.
Supply range and duty cycle — what they mean for your converter
The output configuration supports positive or negative rails, which is useful for generating a negative bias supply from a positive input bus, common in op-amp or LCD bias circuits.
Temperature grade and package fit
Rated for a junction temperature range of 0°C to 125°C, this part is specified for commercial and some industrial environments where the ambient stays above freezing. It is not rated for -40°C cold-crank conditions — if the design must start at -40°C, look at the automotive-grade LM5150QURUMRQ1 instead. The 16-SOIC (0.154" body width, 3.90 mm) package is a standard surface-mount footprint shared by many PWM controllers. The Tube shipping medium is typical for prototype and low-volume builds; production quantities are usually ordered on tape and reel through distribution.
Control features and topology limits
Control features include current limiting, an enable pin for shutdown, and frequency control — the latter lets you set the oscillator timing with an external RC network. There is no clock sync input, so synchronizing multiple converters to a common switching frequency requires external logic or a different controller. Synchronous rectification is not supported, so the external diode rectifier will dominate the thermal budget at higher output currents.
Lifecycle and sourcing posture
It is RoHS3 compliant (NOPB suffix). No official second-source alternate is listed in the record, but the UCC2806DWTR from TI is a functional peer in a similar package with a 50% duty cycle and dual outputs — verify pin compatibility before substituting.