SP4501

 PDA's
 Pagers
 GPS
 Hand Held Medical Devices

Power Supply, V_DD.................................................7.0V
Input Voltages, Logic.....................-0.3V to (VDD+0.3V)
Lamp Outputs...................................................220V_P-P
Operating Temperature.........................-40°C to +85°C
Storage Temperature..........................-65°C to +150°C
Power Dissipation Per Package
14-pin SOIC
(derate 8.33mW/°C above +70°C)....................700mW
14-pin TSSOP
(derate 9.96mW/°C above +70°C)....................800mW

The SP4501 provides designers with both an electroluminescent lamp driver for backlighting and a piezotransducer driver to generate audio alert tones. The integration of an EL lamp driver and a piezotransducer driver in a single cost-effective IC reduces system cost, board space requirements and component count. The S P4501 is ideal for portable applications such as pagers, electronic games, PDAs, medical equipment, and designs with liquid crystal displays, keypads, and backlit readouts. The SP4501 will operate from a +2.2V to +6.0V source. The device features a low power standby mode which draws less than 1mA (typical). The frequency of the internal oscillator is set with a single external resistor. The piezotranducer driver can be driven with the internally generated clock signal or an external clock signal provided by the designer. A single inductor is required to generate the high voltage AC used to drive the EL lamp and the piezotransducer. All input pins are ESD protected with diodes to V_DD and V_SS.