LM27762 - Texas Instruments

LM27762 Low-Noise Positive and Negative Output Integrated Charge Pump Plus LDO

The LM27762 delivers very low-noise positive and negative outputs that are adjustable between ±1.5 V and ±5 V. Input-voltage range is from 2.7 V to 5.5 V, and output current goes up to ±250 mA. With an operating current of only 390 µA and 0.5-µA typical shutdown current, the LM27762 provides ideal performance for power amplifier and DAC bias and other high-c.

Features

•1 Generates Low-Noise Adjustable Positive Supply Voltage Between 1.5 V and 5 V and Negative Supply Voltage Between
  –1.5 V and
  –5 V
• Input Voltage Range 2.7 V to 5.5 V
• ±250-mA Output Current
• Inverting Charge Pump Followed by Negative LDO
• 2-MHz Low-Noise Fixed-Frequency Operation
• 2.5-Ω Inverter Output Impedance, VIN = 5 V
• Negative LDO Dropout Voltage 30 mV at 100 mA, VOUT =
  –5 V
• Positive LDO with 45-mV Dropout Voltage at 100 mA, VOUT = 5 V
• 390-µA Quiescent Current (Typical)
• Shutdown Quiescent Current to 0.5 µA (Typical)
• Current Limit and Thermal Protection
• Power Good Pin (A.