ML4825

Supply Voltage (V_C, V_CC) ........................................... 30V
Output Current, Source or Sink (OUT A, OUT B)
DC ....................................................................... 0.5A
Pulse (0.5s) ......................................................... 2.0A
Analog Inputs
(INV, NI, RAMP)................................ GND 0.3V to 7V
(SS, I_LIM) ........................................... GND 0.3V to 6V
CLOCK Output Current ......................................5mA
E/A OUT Output Current .....................................  5mA
Soft Start Sink Current ...................................... 20mA
R_T Charging Current ..........................................5mA
Junction Temperature
ML4825IX, ML4825CX ........................................ 150
Storage Temperature Range ...............65 to 150
Lead Temperature (soldering 10 sec.) ...............260
Thermal Resistance (_JA)
Plastic DIP or SOIC ......................................... 65/W
Plastic Chip Carrier (PCC) ................................ 60/W

The ML4825 High Frequency PWM Controller is an IC controller optimized for use in Switch Mode Power Supply designs running at frequencies to 1MHz.

Propagation delays of ML4825 are minimal through the comparators and logic for reliable high frequency operation while slew rate and bandwidth are maximized on the error amplifier.

This controller ML4825 is designed to work in either voltage or current mode and provides for input voltage feed forward.

A 1V threshold current limit comparator of ML4825 provides cycleby- cycle current limit while exceeding a 1.4V threshold initiates a soft-start cycle. The soft start pin doubles as a maximum duty cycle clamp. An under-voltage lockout circuit with 800mV of hysteresis assures low startup current and drives the outputs low.

This controller is similar in architecture and performance to the UC1825 controller, however the ML4825 includes many features not found on the 1825. These features are set in Italics.