LP3921SQE

• charger
• DC adapter or USB input
• Thermally regulated charging current
• Undervoltage locking
• 50950 mAh programmable charging current
• 3.0V to 5.5V input voltage range
• Thermal shutdown
• I 2 C compatible interface controls charger, LDO output and audio output enabled
• LDO

• 7. Low noise LDO
• 2×300 mAh
• 3 × 150 mAh
• 2 ×80 mAh

• 2% (typical) voltage accuracy of the output LDO
• audio
• Full differential amplification
• Capable of driving capacitive loads up to 100pF
• No output coupling capacitors are required to buffer the network or bootstrap capacitors
• Space-saving 32-pin 5×5 mm LLP package

illustrate

The LP3921 is a fully integrated charger and fully differential Boomer audio power CDMA mobile phone designed amplifier multi-regulator. While the LP3921 features a high-speed serial interface for integrated and lithium-ion battery charge control, 7 low-noise low-dropout (LDO) regulators and a Boomer audio amplifier allow.

Lithium-ion chargers integrate power FETs, reverse galvanic isolation diodes, current monitor outputs that sense resistors, and require very few external components. Charging temperature regulation to achieve the most efficient charging speed at a given ambient temperature.

LDO regulators offer high PSRR and low noise, making them ideal for power supply to analog and digital loads.

This Boomer audio amplifier is capable of delivering less than 1% distortion (THD+N) of 1.1 watts of continuous average power of 8ΩBTL load. Boomer audio power amplifiers are designed to provide high quality output power with a small amount of external components. This Boomer amplifier does not require output coupling capacitors or starter capacitors, making it ideal for mobile phones and other low-voltage applications where minimal power consumption and component count are paramount requirements. This Boomer amplifier incorporates advanced POP and clicky circuitry, eliminating on-noise and shut-off conversion.

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• CDMA mobile phone
• Low-power wireless phone
• Handheld information appliances
• Personal media player