DESCRIPTION
The UTC3843D/E provides the necessary features to
implement off-line or DC to DC fixed frequency current mode
control schemes with a minimal external parts count. Internally
implemented circuits include under-voltage lockout featuring
start up current less than 1mA, a precision reference trimmed
for accuracy at the error amp input, logic to insure latched
operation, a PWM comparator which also provides current limit
control, and a totem pole output stage designed to source or
sink high peak current. The output stage, suitable for driving N
channel MOSFETs, is low in the off state.

FEATURES
*Optimized for off-line and DC to DC converts
*Low start up current(<1mA)
*Automatic feed forward compensation
*Pulse-by-Pulse current limiting
*Enhanced load response characteristics
*Under-voltage lockout with hysteresis
*Double pulse Suppression
*High current totem pole output
"Internally trimmed bandgap reference
*500kHz operation
*Low Ro error amp