ADM8828ARTZ-REEL7

ADM8828 is a charge-pump voltage inverter that may be used to generate a negative supply from a positive input. Input voltages ranging from +1.5V to +5.5V can be inverted into a negative –1.5V to –5.5V output supply. This inverting scheme is ideal for generating a negative rail in single power-supply systems. Only two small external capacitors are needed for the charge pump. Output currents up to 25mA with greater than 99% efficiency are achievable. This also features a low-power shutdown (SHDN) pin. This can be used to disable the device and reduce the quiescent current to 20nA. Application includes handheld instruments, LCD panels, cellular phones, PDAs, remote data acquisition and op-amp power supplies.

• Inverts input supply voltage
• Shutdown function, requires only two capacitors
• Typical supply current is 600µA (unloaded, VIN=+5V, C1, C2=1mF,1 TA=TMIN to TMAX)
• Input voltage, IN range from 1.5 to 5.5V (RL=10Kohm)
• Minimum output current is 25mA (VIN=+5V, C1, C2=1mF,1 TA=TMIN to TMAX)
• Charge-pump frequency range from 50 to 190KHz (VIN=+5V, C1, C2=1mF,1 TA=TMIN to TMAX)
• Typical power efficiency is 90% ( RL=200 ohm)
• Typical shutdown exit time is 175µs (IL=5mA)

Opmerkingen

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