Datasheet MAX1555EZK+T - Maxim IC, BATTERY CHARGER LI-ION 340 mA SOT23-5 — Ficha de datos

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Manufacturer: Maxim

Description: IC, BATTERY CHARGER LI-ION 340 mA SOT23-5

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Docket:
19-2902; Rev 0; 7/03
SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers
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 current 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

Specifications:

• Battery Charge Voltage: 4.2 V
• Battery IC Case Style: SOT-23
• Battery Type: Li-Ion
• Charge Current Max: 340 mA
• Input Voltage: 7 V
• Number of Pins: 5
• Number of Series Cells: 1
• RoHS: Yes