Product Summary

The SG3525A is a regulating pulse width modulator. It is 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 % andthe inputcommon-mode rangeof the error amplifier includes the reference voltage eliminating external resistors. A sync input to the oscillator allows multiple units to beslaved or a single unit to be synchronizedto an external systemclock. The SG3525A output stage features NOR logic, givinga LOW output for an OFF state.

Parametrics

SG3525A absolute maximum ratings: (1)Vi Supply Voltage: 40 V; (2)VC Collector Supply Voltage: 40 V; (3)IOSC Oscillator Charging Current: 5 mA; (4)Io Output Current, Source or Sink: 500 mA; (5)IR Reference Output Current: 50 mA; (6)IT Current through CT Terminal: 5mA; Logic Inputs: -0.3 to + 5.5V; Analog Inputs: -0.3 to Vi V; (7)Ptot Total Power Dissipation at Tamb = 70 ℃: 1000 mW; (8)Tj Junction Temperature Range: -55 to 150 ℃; (9)Tstg Storage Temperature Range: -65 to 150 ℃.

Features

SG3525A features: (1)8 to 35 v operation; (2)5.1 v reference trimmed to ±1%; (3)100 hz to 500 khz oscillatorrange ; (4)separateoscillatorsyncterminal; (5)adjustable deadtimecontrol; (6)internalsoft-start; (7)pulse-by-pulseshutdown ; (8)input undervoltage lockout with hysteresis ; (9)latching pwm to prevent multiple pulses; (10)dual source/sink output drivers.

Diagrams

SG3525A block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
SG3525ADWG
SG3525ADWG
ON Semiconductor
Voltage Mode PWM Controllers 8-35V PWM
Data Sheet
0-1: $0.70
1-25: $0.56
25-100: $0.49
100-500: $0.38
SG3525ADWR2G
SG3525ADWR2G
ON Semiconductor
Voltage Mode PWM Controllers 8-35V PWM
Data Sheet
0-1: $0.96
1-25: $0.82
25-100: $0.69
100-500: $0.58
500-1000: $0.48
SG3525AN
SG3525AN
STMicroelectronics
Voltage Mode PWM Controllers Voltage Mode w/Sync
Data Sheet
0-1: $0.52
1-10: $0.47
10-100: $0.44
100-250: $0.41
SG3525ANG
SG3525ANG
ON Semiconductor
Voltage Mode PWM Controllers 8-35V PWM
Data Sheet
0-1: $0.70
1-25: $0.56
25-100: $0.49
100-500: $0.38
SG3525AP
SG3525AP
STMicroelectronics
Voltage Mode PWM Controllers Voltage Mode w/Sync
Data Sheet
0-1: $0.76
1-10: $0.69
10-100: $0.59
100-250: $0.50
SG3525AP013TR
SG3525AP013TR
STMicroelectronics
Voltage Mode PWM Controllers Voltage Mode w/Sync
Data Sheet
0-1: $0.81
1-25: $0.73
25-100: $0.45
100-250: $0.43
SG3525ADWR2
SG3525ADWR2
ON Semiconductor
Voltage Mode PWM Controllers 8-35V PWM
Data Sheet
Negotiable 
SG3525ADW
SG3525ADW
ON Semiconductor
Voltage Mode PWM Controllers 8-35V PWM
Data Sheet
Negotiable