FEATURES
· Complementary Outputs
· Practical Operation Switching Frequencies to
1 MHz
· 50-ns Propagation Delay to Output
· High Current Dual Totem Pole Outputs (1.5 A
Peak)
· Wide Bandwidth Error Amplifier
· Fully Latched Logic With Double Pulse
Suppression
· Pulse-by-Pulse Current Limiting
· Soft Start/Maximum Duty Cycle Control
· Under-Voltage Lockout with Hysteresis
· Low Start Up Current (1.1 mA)
· Trimmed Bandgap Reference (5.1 V ± 1%)

DESCRIPTION
The UC1824 family of PWM control devices is
optimized for high frequency switched mode power
supply applications. Particular care was given to
minimizing propagation delays through the comparators and logic circuitry while maximizing
bandwidth and slew rate of the error amplifier. This
controller is designed for use in either current mode
or voltage mode systems with the capability for input
voltage feed-forward.
Protection circuitry includes a current limit
comparator with a 1-V threshold, a TTL compatible
shutdown port, and a soft-start pin which doubles as
a maximum duty cycle clamp. The logic is fully
latched to provide jitter free operation and prohibit
multiple pulses at an output. An under-voltage
lockout section with 800 mV of hysteresis assures
low start up current. During under-voltage lockout,
the outputs are high impedance.