SG3525AN by Microchip Technology

Voltage Mode PWMs Dual Sink/Source Outputs - 100Hz to 500KHz oscillator range

Status: Active
Series: SG3525A
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The SG1525A/1527A series of pulse width modulator integrated circuit s are designed to offer improved performance and lower external parts count when used to implement all types of switching power supplies. The  on-chip +5.1 V reference is trimmed to ±1% initial accuracy and the input common-mode range of the error amplifier includes the reference voltage, eliminating external potentiometers and  divider resistors. A Sync input to the oscillator allows multiple units to be slaved together, or a single unit to be synchronized to an external system clock. A single resistor between the CT pin and the D is charge pin provides a wide range of deadtime adjustment. These devices also feature built-in soft-start circuitry with only a timing capacitor required externally. A Shutdown pin controls both the soft -start circuitry and the output stages, providing instantaneous turn-off with soft-start recycle for slow turn-on. These functions are also controlled by an under voltage lockout which keeps the outputs o ff and the soft-start capacitor discharged for input voltages less than that required for normal operation. Another unique feature of these PWM circuits is a latch following the comparator. Once a  PWM pulse has been terminated for any reason, the outputs remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200mA. The SG1525A output stage features NOR logic, giving a LOW output for an OFF  state. The SG1527A utilizes OR logic, which results in a HIGH output level when OFF

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Features

8V to 35V Operation
5.1V Reference Trimmed to ±1%
100Hz to 500kHz Oscillator Range
Separate Oscillator Sync Terminal
Adjustable Deadtime Control
Internal Soft-start
Input Undervoltage Lockout
Latching P.W.M. to Prevent Multiple Pulses
Dual Source/Sink Output Drivers

Specifications

Regulator Type HI Rel Switching Regulators
Configuration Voltage Mode PWM, Dual Sink
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) 350
Operating Temperature Range (°C) 0 to 70
Vref (V) 5.1
Duty Cycle Min (%) 0
Duty Cycle Max (%) 49
UVLO No
Current Limit No
Quiescent Current (mA) typ 14
Pins | Packaging 16 | PDIP
Temp Range 0C to +70C
Packing Media Tube (25)

Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 1.1127
Shipping Weight (kg) 1.833333
Lead Count 16
Package Type PDIP
Package Width or Size .300in
Soldering Composition Matte Tin

SG3525AN AC-DC Converters by STMicroelectronics

Voltage Mode PWM

Semiconductors - ICs
> Power Management ICs - PMIC
> PWM Controllers
Status: Active
Series: SG3525
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The SG3525A series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip + 5.1 V reference is trimmed to ±1 % and the input common-mode range of the error amplifier includes the reference voltage eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the C T and the discharge terminals provide a wide range of dead time ad- justment.These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuity and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown,as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry includes approximately 500 mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulses has been terminated for any reason,the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The SG3525A output stage features NOR logic, giving a LOW output for an OFF state.

Features

DUAL SOURCE/SINK OUTPUT DRIVERS
LATCHING PWM TO PREVENT MULTIPLE PULSES
PULSE-BY-PULSE SHUTDOWN
INTERNAL SOFT-START
8 TO 35 V OPERATION
100 Hz TO 500 KHz OSCILLATOR RANGE
5.1 V REFERENCE TRIMMED TO ± 1 %
ADJUSTABLE DEADTIME CONTROL
INPUT UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
SEPARATE OSCILLATOR SYNC TERMINAL

Alternative Descriptions

Pwm Controller, Dual, V Mode, 500Khz | Newark Electronics
PWM CONTROLLER, DUAL, V MODE, 500KHZ | element14
SG3525 Series 35 V 20 mA PWM Regulating Pulse Width Modulator - DIP-16 | Future Electronics
Voltage Mode PWM Controller 400mA 16-Pin PDIP Tube | Avnet Asia
ST Switching Voltage RegulatorPWM Controller PDIP | Distrelec

Frequently Asked Questions

Where can I find additional details, specifications and documents for a SG3525AN?

Additional datasheets, footprints and schematics for SG3525AN are listed on our Part Details page. You can also find images and similar parts to SG3525AN on this page.

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Is the SG3525AN RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

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Authorised distributors including Newark Electronics, element14, Farnell, Microchip Technology and Future Electronics have stock available or on a lead time for SG3525AN.

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