MAX15059AETE+T

The MAX15059AETE+T is a 76V, 300mW boost converter and current monitor for APD bias applications in 16 pin TQFN package. The constant frequency pulse width modulating (PWM) step-up DC-DC converter features an internal switch and a high-side current monitor with high speed adjustable current limiting. This device provides current monitoring up to 4mA. The constant-frequency (400KHz) current-mode PWM architecture provides low noise output voltage that is easy to filter. A high voltage internal power MOSFET allows device to boost output voltages up to 76V. Internal soft-start circuitry limits the input current when the boost converter starts. The IC features a shutdown mode to save power. It is used in avalanche photodiode biasing and monitoring, PIN diode bias supply, low-noise varactor diode bias supply, FBON modules and GPON modules.

• Supply voltage range is 2.8V to 5.5V and boost converter output power is 300mW
• Operating temperature range from -40°C to 85°C, wide output voltage range from (VIN + 5V) to 76V
• Internal switch on-resistance is 1ohm (typ) 80V MOSFET at TA = -40°C to +85°C
• Accurate ±5% (1:1) high side current monitor
• Resistor adjustable ultra fast APD current limit (1µs response time)
• Open-drain current-limit indicator flag
• 400KHz fixed switching frequency, internal soft-start and 2µA (max) shutdown current
• Constant PWM frequency provides easy filtering in low-noise applications
• Cycle by cycle current limiting of boost converter switch, undervoltage lockout & thermal shutdown
• Maximum duty cycle is 90%(typ), switching frequency is 400KHz(typ)

Applications

Power Management, System Monitoring

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party