Order
Now Product
Folder Support &
Community Tools &
Software Technical
Documents UC1525A, UC1527A, UC2525A
UC2527A, UC3525A, UC3527A
SLUS191D – FEBRUARY 1997 – REVISED JULY 2017 UCx52xA Regulating Pulse Width Modulators
1 Features 3 Description The UC1525A/1527A 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 CT and the discharge terminals
provides a wide range of dead-time adjustment.
These devices also feature built-in soft-start circuitry
with only an external timing capacitor required. A
shutdown terminal controls both the soft-start circuitry …
