Lm27761dsgr encapsulated wson-8 switching regulator
explain
Lm27761 Low Noise Regulated Switched capacitor voltage inverter can provide adjustable ultra-low noise output for input voltage in the range of 2.7V to 5.5V. Four low-cost capacitors are used in the application solution to provide an output current of up to 250mA. The regulated output of the device can be adjusted in the range of − 5V to − 1.5V. Lm27761 operates at 2MHz (typical) switching frequency to reduce output resistance and voltage ripple.
The operating current of lm27761 is only 370 µ a (charge pump power efficiency is higher than 80% for most loads) and the typical shutdown current is 7 µ a, so it can provide ideal performance when driving power amplifier, DAC bias power rail and other high current and low noise voltage applications.
characteristic
Invert and stabilize the input power supply voltage
Low output ripple
The quiescent current can be reduced to 7 µ a (typical value) when it is turned off
Output current up to 250mA
2.5 Ω inverter output impedance, VIN = 5V
The stability at peak load is ± 4%
370 µ a quiescent current
2MHz (typ.) fixed frequency, low noise operation
Low voltage droop regulator (LDO) power supply rejection ratio at 2MHz frequency
(PSRR) is 35dB (typ.),
The load current is 80mA
LDO voltage drop at 100mA current is 30mV,
VOUT = –5V
Thermal current limiting and protection
Use lm27761 and WEBENCH ® Power designer creation
Build custom design
application
Operational amplifier power supply
Wireless communication system
Mobile power amplifier bias
Interface power supply
Hand held instrument
Hi Fi Headphone Amplifier
Lm27761 Low Noise Regulated Switched capacitor voltage inverter can provide adjustable ultra-low noise output for input voltage in the range of 2.7V to 5.5V. Four low-cost capacitors are used in the application solution to provide an output current of up to 250mA. The regulated output of the device can be adjusted in the range of − 5V to − 1.5V. Lm27761 operates at 2MHz (typical) switching frequency to reduce output resistance and voltage ripple.
The operating current of lm27761 is only 370 µ a (charge pump power efficiency is higher than 80% for most loads) and the typical shutdown current is 7 µ a, so it can provide ideal performance when driving power amplifier, DAC bias power rail and other high current and low noise voltage applications.
characteristic
Invert and stabilize the input power supply voltage
Low output ripple
The quiescent current can be reduced to 7 µ a (typical value) when it is turned off
Output current up to 250mA
2.5 Ω inverter output impedance, VIN = 5V
The stability at peak load is ± 4%
370 µ a quiescent current
2MHz (typ.) fixed frequency, low noise operation
Low voltage droop regulator (LDO) power supply rejection ratio at 2MHz frequency
(PSRR) is 35dB (typ.),
The load current is 80mA
LDO voltage drop at 100mA current is 30mV,
VOUT = –5V
Thermal current limiting and protection
Use lm27761 and WEBENCH ® Power designer creation
Build custom design
application
Operational amplifier power supply
Wireless communication system
Mobile power amplifier bias
Interface power supply
Hand held instrument
Hi Fi Headphone Amplifier
Power the data converter
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