MAX8505EEE 3A 1MHZ Buck Switching Regulator TSSOP16

Description

MAX8505EEE 3A 1MHZ Buck Switching Regulator TSSOP16

Package: 16-QSOP (EE suffix)

1. Electrical Characteristics

• Input Voltage Range: 2.5V to 6.5V

• Output Voltage: Fixed 3.3V or 5V (selectable via SEL pin)

• Output Current: 150mA (max continuous)

• Dropout Voltage: 120mV @ 100mA (typical)

• Quiescent Current: 5.5µA (typical)

• Line Regulation: 0.05%/V (typical)

• Load Regulation: 0.05%/mA (typical)

2. Protection Features

• Over-Current Protection: Yes (foldback current limiting)

• Over-Temperature Protection: Yes (thermal shutdown)

• Reverse Current Protection: Yes

3. Control & Features

• SEL Pin:

  • SEL = GND: Output = 3.3V

  • SEL = VIN: Output = 5.0V

• Enable Pin (EN): Active-high (≥1.5V to enable)

• Power-Good (PG) Output: Open-drain output (low when output is in regulation)

4. Physical Specifications

• Package: 16-QSOP (4mm × 5mm)

• Operating Temperature: -40°C to +85°C

• Junction Temperature: +150°C (max)

5. Pinout (16-QSOP)

6. Applications

• Battery-powered devices

• Portable instruments

• IoT sensors

• Low-power microcontrollers

Typical Performance Curves

1. Quiescent Current vs. Temperature:

   • Stays below 7µA across full temperature range.

2. Dropout Voltage vs. Load Current:

   • ~120mV @ 100mA load.

Design Notes

1. Input/Output Capacitors:

   • Use 1µF ceramic on input and output (minimalist design).

2. Power-Good (PG):

   • Pull-up resistor (10kΩ to VOUT) required for PG signal.

3. Thermal Performance:

   • No heatsink needed for <100mA loads.