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MAX1722EZK-T Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1722EZK-T Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page General Description The MAX1722/MAX1723/MAX1724 compact, high-effi- ciency, step-up DC-DC converters are available in tiny, 5- pin thin SOT23 packages. They feature an extremely low 1.5µA quiescent supply current to ensure the highest pos- sible 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 fea- ture a 0.5 Ω 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 Features o Up to 90% Efficiency o No External Diode or FETs Needed o 1.5µA Quiescent Supply Current o 0.1µA Logic-Controlled Shutdown o ±1% Output Voltage Accuracy o Fixed Output Voltage (MAX1724) or Adjustable Output Voltage (MAX1722/MAX1723) o Up to 150mA Output Current o 0.8V to 5.5V Input Voltage Range o 0.91V Guaranteed Startup (MAX1722/MAX1724) o Internal EMI Suppression (MAX1722/MAX1724) o Thin SOT23-5 Package (1.1mm max Height) 1.5µA IQ, Step-Up DC-DC Converters in Thin SOT23-5 ________________________________________________________________ Maxim Integrated Products 1 GND OUT FB 15 LX BATT MAX1722 THIN SOT23-5 TOP VIEW 2 34 LX OUT IN 0.8V TO 5.5V 3.3V AT UP TO 150mA ON OFF BATT MAX1724 SHDN GND 10 µH OUT Typical Operating Circuit 19-1735; Rev 0; 7/01 Ordering Information Selector Guide 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) Pin Configurations are continued at end of data sheet. PART MAX1722EZK MAX1723EZK MAX1724EZK27 Fixed 2.7 Adjustable Adjustable OUTPUT (V) SHDN No Yes Yes MAX1724EZK30 MAX1724EZK33 MAX1724EZK50 Fixed 5.0 Fixed 3.3 Fixed 3.0 Yes Yes Yes LX DAMPING Yes No Yes Yes Yes Yes ADQK ADQJ ADQI ADQH ADQG ADQF TOP MARK 5 SOT23 5 SOT23 5 SOT23 -40°C to +85°C -40°C to +85°C -40°C to +85°C MAX1724EZK50-T MAX1724EZK33-T MAX1724EZK30-T 5 SOT23 5 SOT23 5 SOT23 PIN- PACKAGE TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C MAX1724EZK27-T MAX1723EZK-T MAX1722EZK-T PART For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Pin Configurations |
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