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SG1526B

Voltage Mode PWM, 500Khz - 8V to 35V Operation -55°C to 125°C

Status: In Production

Features:

  • 8V to 35V Operation
  • 5V Reference Trimmed to ±1%
  • 1Hz to 350kHz Oscillator Range
  • Dual 100mA Source/Sink Outputs
  • Digital Current Limiting
  • Double Pulse Suppression
  • Programmable Deadtime
  • Undervoltage 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
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Device Overview

Summary

The SG1526B is a high-performance pulse width modulator for switching power supplies which offers improved functional and electrical characteristics over the industry-standard SG1526. A direct pin-for-pin replacement for the earlier device with all its features, it incorporates the following enhancements: a bandgap reference circuit for improved regulation and drift characteristics, improved under voltage lockout, lower temperature coefficients on oscillator frequency and current-sense threshold, tighter tolerance on soft start time, much faster SHUTDOWN response, improved double-pulse suppression logic for higher speed operation, and an improved output driver design with low shoot-through current, and faster rise and fall times. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformer-less and transformer-coupled. The SG1526B is specified for operation over the full military ambient temperature range of -55°C to 150°C. The SG2526B is characterized for the industrial range of -25°C to 150°C, and the SG3526B is designed for the commercial range of 0°C to 125°C.

Additional Features
    • 8V to 35V Operation
    • 5V Reference Trimmed to ±1%
    • 1Hz to 350kHz Oscillator Range
    • Dual 100mA Source/Sink Outputs
    • Digital Current Limiting
    • Double Pulse Suppression
    • Programmable Deadtime
    • Undervoltage 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
Parametrics
Name
Value
Regulator Type
HI Rel Switching Regulators
Configuration
Voltage Mode PWMs
Supported Topology
Push-pull, Single ended
Supported Output
2
Minimum Input Voltage (V)
8
Maximum Input Voltage (V)
35
Output Current (mA) Max
100
Maximum Frequency (kHz)
500
Operating Temperature Range (°C)
-55 to 125
Vref (V)
5
Duty Cycle Max (%)
49
UVLO
Yes
Current Limit
Yes
Operating Temp Range
to
Quiescent Current (mA) typ
18

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