MAX17225ENT

Part: MAX17225ELT+T — Analog Devices

Type: Ultra-Low Quiescent Current Synchronous Step-Up DC-DC Converter

Description: 400 mV to 5.5 V input, 1.8 V to 5 V resistor-selectable output synchronous boost converter with 1 A peak inductor current limit, 300 nA quiescent current, and True Shutdown.

Operating Conditions:

• Supply voltage: 0.95 V to 5.5 V (guaranteed startup at 0.95 V; operates down to 400 mV post-startup)
• Operating temperature: -40 °C to +125 °C
• Output voltage range: 1.8 V to 5 V

Absolute Maximum Ratings:

• Max supply voltage: -0.3 V to +6 V (OUT, EN, IN to GND)
• Max continuous current: 1 A RMS (LX RMS Current μDFN), 1.6 A RMS (LX RMS Current WLP)
• Max junction/storage temperature: -40 °C to +150 °C (storage), +150 °C (junction)

Key Specs:

• Peak inductor current limit (MAX17224/5): 0.8 A (min), 1 A (typ), 1.2 A (max)
• Quiescent supply current into OUT: 300 nA (typ), 600 nA (max) (TA = +25 °C, VOUT = 104% of 1.8 V, not switching)
• Total shutdown current into IN, LX: 0.5 nA (typ), 100 nA (max) (TA = +25 °C, VEN = 0 V)
• Minimum startup input voltage: 0.88 V (typ), 0.95 V (max) (RL ≥ 3 kΩ, TA = +25 °C)
• Output regulation accuracy (LPM): -1.5% to +1.5% (LX switching frequency > 1 MHz)
• N-channel switch on-resistance (MAX17224/5): 31 mΩ (typ), 70 mΩ (max) (VOUT = 3.3 V)
• P-channel switch on-resistance (MAX17224/5): 75 mΩ (typ), 150 mΩ (max) (VOUT = 3.3 V)
• LX maximum duty cycle: 70% (min), 75% (typ)

Features:

• True Shutdown disconnects output from input with zero reverse current
• 300 nA quiescent current into OUT
• Single standard 1% resistor-selectable output voltage (1.8 V to 5 V in 100 mV steps)
• Up to 95% peak efficiency
• Down to 400 mV operation post-startup

Applications:

• Optical heart-rate monitoring (OHRM) LED drivers
• Supercapacitor backup for RTC and alarm buzzers
• Primary-cell and secondary-cell portable systems
• Tiny, low-power IoT sensors
• Wearable devices and battery-powered medical equipment

Package:

• 6-pin μDFN (2 mm x 2 mm)
• 6-bump WLP (0.88 mm x 1.4 mm, 0.4 mm pitch)

• 300nA Quiescent Supply Current into OUT
• True Shutdown Mode
• 0.5nA Shutdown Current
• Output Disconnects from Input
• No Reverse Current with V OUT 0V to 5V
• 95% Peak Efficiency
• 400mV to 5.5V Input Range
• 0.88V Minimum Startup Voltage
• 1.8V to 5V Output Voltage Range
• 100mV/Step
• Single 1% Resistor-Selectable Output
• 225mA, 500mA, and 1A Peak Inductor Current Limit
• MAX17220/MAX17221: 225mA I LIM
• MAX17224/MAX17225: 1A I LIM
• MAX17222/MAX17223: 500mA I LIM
• MAX17220/MAX17222/MAX17224 Enable Transient Protection (ETP)
• 2mm x 2mm, 6-Pin μDFN
• 0.88mm x 1.4mm, 6-Bump WLP (2 x 3, 0.4mm Pitch)

• Optical Heart-Rate Monitoring (OHRM) LED Drivers
• Supercapacitor Backup for Real-Time Clock (RTC)/ Alarm Buzzers
• Primary-Cell Portable Systems
• Tiny, Low-Power IoT Sensors
• Secondary-Cell Portable Systems
• Wearable Devices
• Battery-Powered Medical Equipment
• Low-Power Wireless Communication Products

Arm and Cortex are registered trademarks of Arm Limited. Bluetooth is a registered trademark of Bluetooth SIG, Inc. True Shutdown is a trademark of Maxim Integrated Products, Inc.

Ordering Information appears at end of data sheet.

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(V IN = V EN = 1.5V, V OUT = 3V, T A = -40°C to +125°C, typical values are at T A = +25°C, unless otherwise noted. ( Note 2 ))

Note 1: The LX pin has internal clamps to GND and OUT. These diodes may be forward biased during switching transitions. During these transitions, the maximum LX current should be within the maximum RMS current rating for safe operation.

Stresses beyond those listed under 'Absolute Maximum Ratings' may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.