MAX1846EUB+T

The MAX1846EUB+T from Maxim Integrated Products is a high efficiency, current mode, inverting PWM controller in 10 pin µMAX package. It allows designers to implement compact, low noise, negative output DC to DC converters for telecom and networking applications. To minimize switching noise, this device features a current mode, constant frequency PWM control scheme. Operation at high frequency, compatibility with ceramic capacitors and inverting topology without transformers allow for a compact design. Compatibility with electrolytic capacitors and flexibility to operate down to 100KHz allow users to minimize the cost of external components. The high current output drivers are designed to drive a P-channel MOSFET and allow converter to deliver up to 30W. It is used in cellular base stations, networking equipment, optical networking equipment, SLIC supplies, CO DSL line driver supplies, industrial power supplies, servers and VOIP supplies.

• 90% efficiency, internal soft-start, current-mode, PWM control, drives high side P-channel MOSFET
• Operating frequency can be set from 100KHz to 500KHz through a resistor
• Operates from +3V to +16.5V input and generate -500mV to -200V output
• Oscillator frequency is 100KHz (RFREQ=500Kohm) ±1% and maximum duty cycle is 98% (RFREQ=500Kohm) ±1%
• Electrolytic or ceramic output capacitor, UVLO hysteresis is 60mV at TA = 0°C to +85°C
• UVLO threshold VIN rising is 2.8V (-40°C to +85°C), 2.8V(-40°C to +105°C)
• UVLO threshold VIN falling is 2.74V (-40°C to +85°C), 2.74V (-40°C to +105°C)
• Current mode control simplifies compensation and provides good transient response
• Supply current is 0.75mA, shutdown supply current is 10µA at TA = 0°C to +85°C
• Operating temperature range from -40°C to +105°C