LM5088MH-1/NOPB

The LM5088 high voltage non-synchronous buck
controller features all the necessary functions to
implement an efficient, high-voltage buck converter
using a minimum number of external components.
The LM5088 can be configured to operate over an
ultra-wide input voltage range of 4.5 V to 75 V. This
easy-to-use controller includes a level-shifted gate
driver capable of controlling an external N-channel
buck switch. The control method is based upon peak
current mode control utilizing an emulated current
ramp. The use of an emulated control ramp reduces
noise sensitivity of the pulse-width modulation circuit,
allowing reliable control of very small duty cycles
necessary in high input voltage and low output voltage
applications. The LM5088 switching frequency is
programmable from 50 kHz to 1 MHz.
The LM5088 is available in two versions: The
LM5088-1 provides a ±5% frequency dithering
function to reduce the conducted and radiated EMI,
while the LM5088-2 provides a versatile restart timer
for overload protection. Additional features include
a low dropout bias regulator, tri-level enable input
to control shutdown and standby modes, soft start,
and oscillator synchronization capability. The device
is available in a thermally enhanced 16-pin HTSSOP
package.