Product details

Topology Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull Duty cycle (Max) (%) 50 Supply voltage (Max) (V) 35 UVLO thresholds on/off (V) 7/6.8 Features Error Amplifier, Multi-topology, Soft Start, Synchronization Pin Operating temperature range (C) 0 to 70 Rating Catalog, Military Frequency (Max) (kHz) 400 Gate drive (Typ) (A) 0.1
Topology Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull Duty cycle (Max) (%) 50 Supply voltage (Max) (V) 35 UVLO thresholds on/off (V) 7/6.8 Features Error Amplifier, Multi-topology, Soft Start, Synchronization Pin Operating temperature range (C) 0 to 70 Rating Catalog, Military Frequency (Max) (kHz) 400 Gate drive (Typ) (A) 0.1
PDIP (N) 18 211 mm² 22.48 x 9.4 SOIC (DW) 18 119 mm² 11.55 x 10.3
  • 8 To 35V Operation
  • 5V Reference Trimmed To ±1%
  • 1Hz To 400kHz Oscillator Range
  • Dual 100mA Source/Sink Outputs
  • Digital Current Limiting
  • Double Pulse Suppression
  • Programmable Deadtime
  • Under-Voltage Lockout
  • Single Pulse Metering
  • Programmable Soft-Start
  • Wide Current Limit Common Mode Range
  • TTL/CMOS Compatible Logic Ports
  • Symmetry Correction Capability
  • Guaranteed 6 Unit Synchronization
  • 8 To 35V Operation
  • 5V Reference Trimmed To ±1%
  • 1Hz To 400kHz Oscillator Range
  • Dual 100mA Source/Sink Outputs
  • Digital Current Limiting
  • Double Pulse Suppression
  • Programmable Deadtime
  • Under-Voltage Lockout
  • Single Pulse Metering
  • Programmable Soft-Start
  • Wide Current Limit Common Mode Range
  • TTL/CMOS Compatible Logic Ports
  • Symmetry Correction Capability
  • Guaranteed 6 Unit Synchronization

The UC1526 is a high performance monolithic pulse width modulator circuit designed for fixed-frequency switching regulators and other power control applications. Included in an 18-pin dual-in-line package are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and setting logic, and two low impedance power drivers. Also included are protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. For ease of interface, all digital control ports are TTL and B-series CMOS compatible. Active LOW logic design allows wired-OR connections for maximum flexibility. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless and transformer coupled. The UC1526 is characterized for operation over the full military 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 for operation from 0° to +70°C.

The UC1526 is a high performance monolithic pulse width modulator circuit designed for fixed-frequency switching regulators and other power control applications. Included in an 18-pin dual-in-line package are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and setting logic, and two low impedance power drivers. Also included are protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. For ease of interface, all digital control ports are TTL and B-series CMOS compatible. Active LOW logic design allows wired-OR connections for maximum flexibility. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless and transformer coupled. The UC1526 is characterized for operation over the full military 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 for operation from 0° to +70°C.

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Type Title Date
* Data sheet Regulating Pulse Width Modulator datasheet 05 Sep 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 Sep 1999

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PDIP (N) 18 View options
SOIC (DW) 18 View options

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