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ELM91503AA-N Datasheet(PDF) 1 Page - ELM Technology Corporation |
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ELM91503AA-N Datasheet(HTML) 1 Page - ELM Technology Corporation |
1 / 22 page 1 ELM91xxxxA CMOS PFM Step-up DC/DC converter and controller ■General description Parameter Symbol Limit Unit Apply voltage to LX pin Vlx Vss-0.3 to 7.0 V Apply voltage to VOUT pin Vout Vss-0.3 to 7.0 V Output current of LX pin Ilx 500 mA Output current of EXT pin Iext 20 mA Power dissipation Pd 500 (SOT-89) mW 250 (SOT-23) 150 (SC-70) Operationg temperature Top -40 to +85 °C Storage temperature Tstg -55 to +125 °C • Output voltage range : 1.8V to 5.5V (by 0.1V) • Low voltage operation : 0.9V(ELM91xx1xA: Iout=1mA) • Oscillating frequency : Typ.100kHz • Low power operation : Typ.40µW(ELM91301xA: Typ.100kHz) • High efficiency : 85%(ELM9130xxA: Vin=1.5V, Iout=10mA) • Output current(e.g.) : 100mA(Vin=1.5V, Vout=3.0V) • Package : SOT-89, SOT-23, SC-70(SOT-323) • Constant voltage source for battery- operated devices • Portable communication equipments and video recorders ELM91xxxxA-x Symbol a, b Output voltage e.g. : 18: Vout=1.8V 30: Vout=3.0V 33: Vout=3.3V 50: Vout=5.0V c Switching transistor 1: Internal switch 3: External switch d Package A: SOT-89 B: SOT-23 C: SC-70(SOT-323) e Product version A f Taping direction S , N: Refer to PKG file ELM91 x x x x A - x ↑ ↑ ↑ ↑ ↑ ↑ a b c d e f ■Features ■Maximum absolute ratings ■Selection guide ■Application 22 - ELM91xx1xA is CMOS PFM control step-up DC-DC converter; ELM91xx3xA is CMOS PFM control step- up DC-DC controller, which has large output current capacity by using an external FET switch. ELM91 series consists of reference voltage source, error amplifier, oscillation circuit, start-up circuit, PFM-control circuit, switching current limit circuit (ELM91xx1xA only), switching transistor (ELM91xx1xA only) and output voltage setting resistor. For external parts, coil, diode, MOSFET and capacitor are possible choices. The standard output voltages are 1.8V,3.0V,3.3V,5.0V; ELM91 series can also be designed as semi-custom IC within the range of 1.8V to 5.5V by 0.1V step. |
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