SG3525AN
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STMicroelectronics SG3525AN

Manufacturer No:
SG3525AN
Manufacturer:
STMicroelectronics
Package:
Tube
Description:
IC REG CTRLR BCK/PUSH-PULL 16DIP
Delivery:
Payment:
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Product Introduction

Overview

The SG3525AN, produced by STMicroelectronics, is a pulse width modulator (PWM) integrated circuit designed to enhance performance and reduce the external parts count in various switching power supply designs. This device is part of the SG3525A series, which offers a range of features that make it versatile and efficient for power management applications.

Key Specifications

Parameter Value Unit
Supply Voltage (VCC) 8.0 to 35 V
Collector Supply Voltage (VC) 8.0 to 35 V
Reference Output Voltage (Vref) 5.1 ± 1.0% V
Oscillator Frequency Range 100 Hz to 400 kHz
Output Current, Source or Sink (IO) ±500 mA
Reference Output Current (Iref) 50 mA
Oscillator Charging Current 5.0 mA
Power Dissipation (PD) at TA = +25°C 1000 mW
Junction Temperature Range (Tj) -55 to 150°C
Storage Temperature Range (Tstg) -65 to 150°C

Key Features

  • Dual Source/Sink Output Drivers: Capable of sourcing or sinking in excess of 200 mA.
  • Latching PWM: Prevents multiple pulses by keeping the outputs off for the duration of the period after a PWM pulse is terminated.
  • Pulse-by-Pulse Shutdown: Allows for instantaneous turn-off through the PWM latch with pulsed shutdown and soft-start recycle with longer shutdown commands.
  • Internal Soft-Start: Requires only an external timing capacitor.
  • 8.0 V to 35 V Operation: Wide operating voltage range.
  • 100 Hz to 400 kHz Oscillator Range: Adjustable oscillator frequency.
  • 5.1 V Reference Trimmed to ±1%: High accuracy reference voltage.
  • Adjustable Deadtime Control: Adjustable deadtime using a single resistor.
  • Input Undervoltage Lockout with Hysteresis: Prevents operation below nominal input voltage with approximately 500 mV of hysteresis.
  • Separate Oscillator Sync Terminal: Allows synchronization with an external system clock.

Applications

The SG3525AN is widely used in various switching power supply designs, including:

  • Switch-mode power supplies (SMPS)
  • DC-DC converters
  • Power inverters
  • Motor control systems
  • High-frequency power supplies

Q & A

  1. What is the operating voltage range of the SG3525AN?

    The SG3525AN operates within a voltage range of 8.0 V to 35 V.

  2. What is the accuracy of the on-chip reference voltage?

    The on-chip reference voltage is trimmed to ±1% at 5.1 V.

  3. What is the oscillator frequency range of the SG3525AN?

    The oscillator frequency range is from 100 Hz to 400 kHz.

  4. How does the SG3525AN handle deadtime adjustment?

    Deadtime can be adjusted using a single resistor connected between the CT and Discharge pins.

  5. What is the purpose of the undervoltage lockout feature?

    The undervoltage lockout feature keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages, ensuring jitter-free operation.

  6. Can the SG3525AN be synchronized with an external clock?

    Yes, the SG3525AN has a separate oscillator sync terminal that allows synchronization with an external system clock.

  7. What type of output drivers does the SG3525AN have?

    The SG3525AN features dual source/sink output drivers capable of sourcing or sinking in excess of 200 mA.

  8. How does the soft-start feature work in the SG3525AN?

    The SG3525AN has built-in soft-start circuitry that requires only an external timing capacitor for operation.

  9. What is the maximum output current of the SG3525AN?

    The maximum output current is ±500 mA.

  10. What is the junction temperature range of the SG3525AN?

    The junction temperature range is from -55°C to 150°C.

Product Attributes

Output Type:Transistor Driver
Function:Step-Down, Step-Up/Step-Down
Output Configuration:Positive
Topology:Buck, Push-Pull
Number of Outputs:2
Output Phases:1
Voltage - Supply (Vcc/Vdd):8V ~ 35V
Frequency - Switching:100Hz ~ 400kHz
Duty Cycle (Max):49%
Synchronous Rectifier:Yes
Clock Sync:Yes
Serial Interfaces:- 
Control Features:Enable, Soft Start
Operating Temperature:0°C ~ 70°C (TA)
Mounting Type:Through Hole
Package / Case:16-DIP (0.300", 7.62mm)
Supplier Device Package:16-DIP
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Similar Products

Part Number SG3525AN SG3525ANG SG3525AP SG2525AN
Manufacturer STMicroelectronics onsemi STMicroelectronics Microchip Technology
Product Status Active Active Active Discontinued at Digi-Key
Output Type Transistor Driver Transistor Driver Transistor Driver Transistor Driver
Function Step-Down, Step-Up/Step-Down Step-Up/Step-Down Step-Down, Step-Up/Step-Down Step-Up/Step-Down
Output Configuration Positive Positive Positive Positive
Topology Buck, Push-Pull Push-Pull Buck, Push-Pull Push-Pull
Number of Outputs 2 2 2 2
Output Phases 1 1 1 1
Voltage - Supply (Vcc/Vdd) 8V ~ 35V 8V ~ 35V 8V ~ 35V 8V ~ 35V
Frequency - Switching 100Hz ~ 400kHz 100Hz ~ 400kHz 100Hz ~ 400kHz 100Hz ~ 350kHz
Duty Cycle (Max) 49% 49% 49% 49%
Synchronous Rectifier Yes Yes Yes Yes
Clock Sync Yes Yes Yes Yes
Serial Interfaces - - - -
Control Features Enable, Soft Start Enable, Frequency Control, Soft Start Enable, Soft Start Enable, Soft Start
Operating Temperature 0°C ~ 70°C (TA) 0°C ~ 70°C (TA) 0°C ~ 70°C (TA) -25°C ~ 85°C (TA)
Mounting Type Through Hole Through Hole Surface Mount Through Hole
Package / Case 16-DIP (0.300", 7.62mm) 16-DIP (0.300", 7.62mm) 16-SOIC (0.154", 3.90mm Width) 16-DIP (0.300", 7.62mm)
Supplier Device Package 16-DIP 16-PDIP 16-SO 16-PDIP

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