Lm2611 Integrated Circuits ( ICs ) Pmic - Voltage Regulators

China Lm2611 Integrated Circuits (ICs) Pmic

Basic Info.

Model NO.

LM2611AMF/NOPB

Voltage-Output(Max)

-22V

Current-Output

1.2A

Trademark

Texas Instruments

Origin

USA

Model NO.

LM2611AMF/NOPB

Voltage-Output(Max)

-22V

Current-Output

1.2A

Trademark

Texas Instruments

Origin

USA

Product Desciption

LM2611 1.4-MHz Cuk Converter,Texas Instruments
1 Features
1.4-MHz Switching Frequency
Low RDS(ON) DMOS FET
1-mVp-p Output Ripple
−5 V at 300 mA From 5-V Input
Better Regulation Than a Charge Pump
Uses Tiny Capacitors and Inductors
Wide Input Range: 2.7 V to 14 V
Low Shutdown Current: <1 µA
5-Pin SOT-23 Package
2 Applications
MR Head Bias
Digital Camera CCD Bias
LCD Bias
GaAs FET Bias
Positive to Negative Conversion
3 Description
The LM2611 is a current mode, PWM inverting
switching regulator. Operating from a 2.7-V to 4-V
supply, it is capable of producing a regulated
negative output voltage of up to −(36 VIN(MAX)). The
LM2611 utilizes an input and output inductor, which
enables low voltage ripple and RMS current on both
the input and the output. With a switching frequency
of 1.4 MHz, the inductors and output capacitor can be
physically small and low cost. High efficiency is
achieved through the use of a low RDS(ON) FET.
The LM2611 features a shutdown pin, which can be
activated when the part is not needed to lower the Iq
and save battery life. A negative feedback (NFB) pin
provides a simple method of setting the output
voltage, using just two resistors. Cycle-by-cycle
current limiting and internal compensation further
simplify the use of the LM2611.
The LM2611 is available as a small 5-pin, SOT-23
package and comes in two grades. Grade A has a
1.2-A current limit and 0.5-Ω RDS(ON), and Grade B
has a 0.9-A current limit and 0.7-Ω RDS(ON).
Lm2611 Integrated Circuits (ICs) Pmic - Voltage Regulators