MAX1833EUT#TG16

EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX1832–MAX1835 High-Efficiency Step-Up Converters with Reverse Battery Protection General Description The MAX1832–MAX1835 are high-efficiency step-up converters with complete reverse battery protection that protects the device and the load when the battery is reversed. They feature a built-in synchronous rectifier, which allows for over 90% efficiency and reduces size and cost by eliminating the need for an external Schottky diode. These step-up converters operate from a +1.5V to +5.5V input voltage range and deliver up to 150mA of load current. The MAX1833EUT/MAX1835EUT (SOT devices) have a fixed 3.3V output voltage. The MAX1833ETT30 (TDFN device) has a fixed 3.0V output voltage. The MAX1832/MAX1834 have adjustable outputs from +2V to +5.5V. In shutdown, the MAX1832/MAX1833 connect the battery input to the voltage output, allowing the input battery to be used as a backup or real-time clock supply when the converter is off (see Selector Guide). MAX183_EUT devices are available in a miniature 6-pin SOT23 package. The MAX1833ETT30 is available in a 3mm x 3mm thin DFN package. The MAX1832EVKIT is available to speed designs. Applications ●● ●● ●● ●● ●● ●● ●● ●● ●● PINPACKAGE TOP MARK MAX1832EUT+T -40°C to +85°C 6 SOT23-6 AAOT MAX1833EUT+T -40°C to +85°C 6 SOT23-6 AAOU MAX1833ETT30+T -40°C to +85°C 6 TDFN-6 (T633-1) ABX MAX1834EUT+T -40°C to +85°C 6 SOT23-6 AAOV MAX1835EUT+T -40°C to +85°C 6 SOT23-6 AAOW VBATT Fixed 3.3V VBATT MAX1833ETT30+T Fixed 3.0V VBATT MAX1834EUT+T Adjustable VBATT - 0.7V MAX1835EUT+T Fixed 3.3V VBATT - 0.7V OUT LX 4 MAX1833EUT+T MAX1833ETT LX 1 2 3 GND 4 Adjustable MAX1832EUT+T 5 FB (RST) OUT OUTPUT VOLTAGE IN SHUTDOWN 6 BATT 6 MAX1832 MAX1834 2 (MAX1833EUT) 5 (MAX1835) OUTPUT VOLTAGE PART SHDN SHDN 1 TDFN (3mm x 3mm) 19-1802; Rev 3; 9/18 TEMP RANGE RST TOP VIEW SOT23 Ordering Information Selector Guide Pin Configurations GND 3 ●● Reverse Battery Protection for DC-DC Converter and Load ●● Up to 90% Efficiency ●● No External Diode or FETs Needed ●● Internal Synchronous Rectifier ●● 4μA Quiescent Current ●● r %×V 2 Table 1. Suggested Inductors and Suppliers MANUFACTURER INDUCTOR PHONE Coilcraft DS1608C-103 DO1606T-103 847-639-6400 Sumida CDRH4D18-100 CR43-100 847-956-0666 Murata LQH4N100K 814-237-1431 Table 2. Suggested Surface-Mount Capacitors and Manufacturers VALUE (µF) DESCRIPTION MANUFACTURER PHONE 594/595 D-series tantalum Sprague 603-224-1961 TAJ, TPS-series tantalum AVX 803-946-0690 4.7 to 10 X7R ceramic TDK 847-390-4373 4.7 to 22 X7R ceramic Taiyo Yuden 408-573-4150 4.7 to 47 reduces the peak current drawn from the battery and can be the same value as the output capacitor. A larger input capacitor can be used to further reduce ripple and improve efficiency. PC Board Layout and Grounding Careful printed circuit layout is important for minimizing ground bounce and noise. Keep the IC’s GND pin and the ground leads of the input and output filter capacitors less than 0.2in (5mm) apart. In addition, keep all connections to the FB and LX pins as short as possible. In particular, when using external feedback resistors, locate them as close to FB as possible. To maximize output power and efficiency and minimize output ripple voltage, use a ground plane and solder the IC’s GND directly to the ground plane. Chip Information TRANSISTOR COUNT: 953 PROCESS: BiCMOS OUT where r is the desired output ripple in %. A 10μF ceramic capacitor is a good starting value. The input capacitor www.maximintegrated.com Maxim Integrated │  9 MAX1832–MAX1835 High-Efficiency Step-Up Converters with Reverse Battery Protection Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. www.maximintegrated.com Maxim Integrated │  10 MAX1832–MAX1835 High-Efficiency Step-Up Converters with Reverse Battery Protection Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. www.maximintegrated.com Maxim Integrated │  11 MAX1832–MAX1835 High-Efficiency Step-Up Converters with Reverse Battery Protection Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. www.maximintegrated.com Maxim Integrated │  12 MAX1832–MAX1835 High-Efficiency Step-Up Converters with Reverse Battery Protection Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. www.maximintegrated.com Maxim Integrated │  13 MAX1832–MAX1835 High-Efficiency Step-Up Converters with Reverse Battery Protection Revision History REVISION NUMBER REVISION DATE 3 11/18 DESCRIPTION Updated Ordering Information PAGES CHANGED 1 For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. ©  2018 Maxim Integrated Products, Inc. │  14