LM27761 Texas instruments

LM27761

Уточнить цену

LM27761

Уточнить цену

СРАВНИТЬ

В СРАВНЕНИИ

Уточнить цену

Описание

The LM27761 low-noise regulated switched-capacitor voltage inverter delivers a very low-noise adjustable output for an input voltage in the range of 2.7 V to 5.5 V. Four low-cost capacitors are used in the application solution to provide up to 250 mA of output current. The regulated output for the device is adjustable between −1.5 V and −5 V. The LM27761 operates at 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 370 µA (charge-pump power efficiency greater than 80% with most loads) and 7-µA typical shutdown current, the LM27761 provides ideal performance when driving power amplifiers, DAC bias rails, and other high-current, low-noise voltage applications.

Inverts and Regulates the Input Supply Voltage
Low Output Ripple
Shutdown Lowers Quiescent Current to 7 µA (Typical)
Up to 250-mA Output Current
2.5-Ω Inverter Output Impedance, V_IN = 5 V
±4% Regulation at Peak Load
370-µA Quiescent Current
2-MHz (Typical) Low-Noise Fixed-Frequency Operation
35-dB (Typical) LDO PSRR at 2 MHz
With 80-mA Load Current
30-mV LDO Dropout Voltage at 100 mA,
V_OUT = –5 V
Current Limit and Thermal Protection
Create a Custom Design Using the LM27761 With the WEBENCH^® Power Designer

Vin (min) (V)	2.7
Vin (max) (V)	5.5
Vout (min) (V)	-5.2
Vout (max) (V)	-1.5
Iout (max) (A)	0.25
Regulated outputs (#)	1
Switching frequency (min) (kHz)	1700
Switching frequency (max) (kHz)	2300
Iq (typ) (mA)	0.37
Features	Enable, Integrated LDO, Light Load Efficiency Mode, Output discharge, Synchronous Rectification, UVLO Fixed
Operating temperature range (°C)	-40 to 85
Rating	Catalog
Type	Charge pump