MAX1723EZK+T

The MAX1722/MAX1723/MAX1724 compact, high-efficiency, step-up DC-DC converters are available in tiny, 5-pin TSOT packages. They feature an extremely low 1.5μA quiescent supply current to ensure the highest possible light-load efficiency. Optimized for operation from one to two alkaline or nickel-metal-hydride (NiMH) cells, or a single Li+ cell, these devices are ideal for applications where extremely low quiescent current and ultra-small size are critical. Built-in synchronous rectification significantly improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. All three devices feature a 0.5Ω N-channel power switch. The MAX1722/ MAX1724 also feature proprietary noise-reduction circuitry, which suppresses electromagnetic interference (EMI) caused by the inductor in many step-up applications. The family offers different combinations of fixed or adjustable outputs, shutdown, and EMI reduction (see Selector Guide).

Applications

• Pagers
• Remote Controls
• Remote Wireless Transmitters
• Personal Medical Devices
• Digital Still Cameras
• Single-Cell Battery Powered Devices
• Low-Power Hand-Held Instruments
• MP3 Players
• Personal Digital Assistants (PDA)

Key features

• Up to 90% Efficiency
• No External Diode or FETs Needed
• 1.5μA Quiescent Supply Current
• 0.1μA Logic-Controlled Shutdown
• ±1% Output Voltage Accuracy
• Fixed Output Voltage (MAX1724) or Adjustable Output Voltage (MAX1722/MAX1723)
• Up to 150mA Output Current
• 0.8V to 5.5V Input Voltage Range
• 0.91V Guaranteed Startup (MAX1722/MAX1724)
• Internal EMI Suppression (MAX1722/MAX1724)
• TSOT Package (9.9mm typ Height)
• μDFN Package (2mm×2mm×0.75mm)