The latest product to roll out of the maxim stables, the MAX15031 seems to be quite a bit of a performer, combining several advantages into one product.

It consists of a constant-frequency pulse-width modulating (PWM) step-up DC-DC converter with an internal switch and a high-side current monitor with high-speed adjustable current limiting. The MAX15031 can be used for a wide variety of applications such as avalanche photodiode biasing, PIN biasing, or varactor biasing, and LCD displays. The MAX15031 operates from 2.7V to 11V.

The constant-frequency (400kHz), current-mode PWM architecture provides low-noise output voltage that is easy to filter. A high-voltage, internal power switch allows this device to boost output voltages up to 76V. Internal soft-start circuitry limits the input current when the boost converter starts. The MAX15031 features a shutdown mode to save power.

Several of the key features are given below. Protection features include cycle-by-cycle current limiting of the boost converter switch, undervoltage lockout, and thermal shutdown if the die temperature reaches +160°C.

The MAX15031 is available in a thermally enhanced 4mm x 4mm, 16-pin TQFN package and operates over the -40°C to +125°C automotive temperature range.

Key Features
• Input Voltage Range
o +2.7V to +5.5V (Using Internal Charge Pump) or
o +5.5V to +11V
• Wide Output-Voltage Range from (VIN + 1V) to 76V
• Internal 1Ω (typ) 80V Switch
• 300mW Boost Converter Output Power
• Accurate ±10% (500nA to 1mA) and ±3.5% (1mA to 4mA) High-Side Current Monitor
• Resistor-Adjustable Ultra-Fast APD Current Limit (1µs Response Time)
• Open-Drain Current-Limit Indicator Flag
• 400kHz Fixed Switching Frequency
• Constant PWM Frequency Provides Easy Filtering in Low-Noise Applications
• Internal Soft-Start
• 2µA (max) Shutdown Current
• -40°C to +125°C Temperature Range
• Small Thermally Enhanced, 4mm x 4mm, 16-Pin TQFN Package

SOURCE: http://datasheets.maxim-ic.com/en/ds/MAX15031.pdf