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MAX1555EZK-T Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1555EZK-T Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 8 page AVAILABLE Functional Diagrams Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. General Description The MAX1551/MAX1555 charge a single-cell lithium-ion (Li+) battery from both USB and AC adapter sources. They operate with no external FETs or diodes, and accept operating input voltages up to 7V. On-chip thermal limiting simplifies PC board layout and allows optimum charging rate without the thermal limits imposed by worst-case battery and input voltage. When the MAX1551/MAX1555 thermal limits are reached, the chargers do not shut down, but progressively reduce charging current. The MAX1551 includes a POK output to indicate when input power is present. If either charging source is active, POK goes low. The MAX1555 instead features a CHG output to indicate charging status. With USB connected, but without DC power, charge cur- rent is set to 100mA (max). This allows charging from both powered and unpowered USB hubs with no port communication required. When DC power is connected, charging current is set at 280mA (typ). No input-blocking diodes are required to prevent battery drain. The MAX1551/MAX1555 are available in 5-pin thin SOT23 packages and operate over a -40°C to +85°C range. Applications PDAs Wireless Appliances Cell Phones Digital Cameras Features ♦ Charge from USB or AC Adapter ♦ Automatic Switchover when AC Adapter is Plugged In ♦ On-Chip Thermal Limiting Simplifies Board Design ♦ Charge Status Indicator ♦ 5-Pin Thin SOT23 Package SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers Ordering Information 19-2902; Rev 0; 7/03 PART TEMP RANGE PIN-PACKAGE MAX1551EZK-T -40°C to +85°C 5 Thin SOT23-5 MAX1555EZK-T -40°C to +85°C 5 Thin SOT23-5 GND DC 15 BAT USB MAX1551 (MAX1555) THIN SOT23 TOP VIEW 2 34 POK (CHG) Pin Configuration MAX1551 (MAX1555) DC USB BAT AC ADAPTER 3.7V TO 7V USB 3.7V TO 6V TO SYSTEM LOAD Li+ GND TO LOGIC RAIL CHARGE CONTROL POK (CHG) LOGIC CONTROL Typical Operating Circuit Selector Guide PART TOP MARK FEATURES MAX1551EZK ADRT POK Output MAX1555EZK ADRU CHG Output MAX1551/MAX1555 |
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