(Hong Kong)
Product Summary
The ELM9430A-S is a CMOS step-up DC/DC converter which consists of reference voltage source, error amplifier, oscillation circuit, start-up circuit, PFM control circuit, switching transistor and output voltage setting resistor. For external parts, coil, diode and capacitor are possible choices; with external parts, the ELM9430A-S is able to acquire constant output voltage higher than input voltage. The standard output voltages are 2.7V, 3.0V, 3.3V, and 5.0V; The ELM9430A-S can also be designed as semi-custom IC within the range of 2.5V to 5.5V by 0.1V step. The applications of the ELM9430A-S include Constant voltage source for battery operated devices, Constant voltage source for cameras, Portable communication equipments, Local regulator.
Parametrics
ELM9430A-S absolute maximum ratings: (1)Apply voltage to LX pin Vlx: 12V; (2)Apply voltage to VOUT pin Vout: 12V; (3)Output current of LX pin Ilx: 20mA; (4)Power dissipation Pd: 300mW; (5)Operating temperature Top: -40 to +85℃; (6)Storage temperature Tstg: -55 to +125℃.
Features
ELM9430A-S features: (1)Output voltage range : 2.5V to 5.5V (by 0.1V); (2)Low voltage operation : Vin≥0.98V (RL=30kΩ); (3)Low power operation : 12μW (Typ. ELM9430B); (4)High efficiency : Typ. 80%; (5)High output voltage accuracy : ±2.5%; (6)Output current(e.g.) : 20mA (When Vin=1.5V, Vout=3.0V); (7)Package : SOT-89.
Diagrams
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