1 Features 3 Description

1 The LM2611 is a current mode, PWM inverting • 1.4-MHz Switching Frequency

switching regulator. Operating from a 2.7-V to 4-V

• Low RDS(ON) DMOS FET supply, it is capable of producing a regulated

• 1-mVp-p Output Ripple negative output voltage of up to −(36 VIN(MAX)). The

• −5 V at 300 mA From 5-V Input LM2611 utilizes an input and output inductor, which

enables low voltage ripple and RMS current on both

• Better Regulation Than a Charge Pump the input and the output. With a switching frequency

• Uses Tiny Capacitors and Inductors of 1.4 MHz, the inductors and output capacitor can be

• Wide Input Range: 2.7 V to 14 V physically small and low cost. High efficiency is

achieved through the use of a low RDS(ON) FET. • Low Shutdown Current: <1 μA

• 5-Pin SOT-23 Package The LM2611 features a shutdown pin, which can be

activated when the part is not needed to lower the Iq

2 Applications and save battery life. A negative feedback (NFB) pin

provides a simple method of setting the output

• MR Head Bias voltage, using just two resistors. Cycle-by-cycle

• Digital Camera CCD Bias current limiting and internal compensation further

simplify the use of the LM2611. • LCD Bias

• GaAs FET Bias The LM2611 is available as a small 5-pin, SOT-23

package and comes in two grades. Grade A has a • Positive to Negative Conversion

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)

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