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MAX6848KARD3 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6848KARD3 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page General Description The MAX6846–MAX6849 are a family of ultra-low-power battery monitors with integrated microprocessor (µP) supervisors. The user-adjustable battery monitors are offered with single or dual low-battery output options that can be used to signal when the battery is OK (enabling full system operation), when the battery is low (for low- power system operation), and when the battery is dead (to disable system operation). These devices also have an independent µP supervisor that monitors VCC and provides an active-low reset output. A manual reset function is available to reset the µP with a pushbutton. The MAX6846–MAX6849 are ideal for single-cell lithium- ion (Li+) or multicell alkaline/NiCd/NiMH applications. When the battery voltage drops below each adjusted low threshold, the low-battery outputs are asserted to alert the system. When the voltage rises above the adjusted high thresholds, the outputs are deasserted after a 150ms minimum timeout period, ensuring the voltages have stabilized before power circuitry is activated or pro- viding microprocessor reset timing. These devices have user-adjustable battery threshold voltages, providing a wide hysteresis range to prevent chattering that can result due to battery recovery after load removal. Single low-battery outputs are supplied by the MAX6846/MAX6847 and dual low-battery out- puts are supplied by the MAX6848/MAX6849. All bat- tery monitors have open-drain low-battery outputs. The MAX6846–MAX6849 monitor system voltages (VCC) from 1.8V to 3.3V with seven fixed reset threshold options. Each device is offered with two minimum reset timeout periods of 150ms or 1200ms. The MAX6846/ MAX6848 are offered with an open-drain RESET output and the MAX6847/MAX6849 are offered with a push- pull RESET output. The MAX6846–MAX6849 are offered in a SOT23 pack- age and are fully specified over a -40°C to +85°C temp- erature range. Applications Battery-Powered Systems (Single-Cell Li+ or Multicell NiMH, NiCd, Alkaline) Cell Phones/Cordless Phones Portable Medical Devices Digital Cameras Pagers PDAs MP3 Players Electronic Toys Features o User-Adjustable Thresholds for Monitoring Single-Cell Li+ or Multicell Alkaline/NiCd/NiMH Applications o Single and Dual Low-Battery Output Options o Independent µP Reset with Manual Reset o Factory-Set Reset Thresholds for Monitoring 1.8V to 3.3V Systems o Available with 150ms (min) or 1.2s (min) VCC Reset Timeout Period Options o 150ms (min) LBO Timeout Period o Immune to Short-Battery Voltage Transients o Low Current (2.5µA, typ at 3.6V) o -40°C to +85°C Operating Temperature Range o Small 8-Pin SOT23 Packages Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset ________________________________________________________________ Maxim Integrated Products 1 TOP VIEW MR RESET LBO 1 2 8 7 VCC HTHIN GND LTHIN VDD SOT23 3 4 6 5 MAX6846 MAX6847 1 2 8 7 VCC HTHIN GND LTHIN VDD SOT23 3 4 6 5 MAX6848 MAX6849 LBOL LBOH RESET Pin Configurations Ordering Information 19-2947; Rev 0; 7/03 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. PART TEMP RANGE PIN-PACKAGE MAX6846KA_D_-T -40°C to +85°C 8 SOT23-8 MAX6847KA_D_-T -40°C to +85°C 8 SOT23-8 MAX6848KA_D_-T -40°C to +85°C 8 SOT23-8 MAX6849KA_D_-T -40°C to +85°C 8 SOT23-8 Note: The first “_” is the VCC reset threshold level, suffix found in Table 1. The “_” after the D is a placeholder for the reset timeout period suffix found in Table 2. All devices are available in tape-and-reel only. There is a 2500 piece minimum order increment for standard versions (see Standard Versions table). Sample stock is typically held on standard versions only. Non- standard versions require a minimum order increment of 10,000 pieces. Contact factory for availability. |
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