LM2611 Datasheet | Texas Instruments

Features - 1 1.4-MHz Switching Frequency - Low RDS(ON) DMOS FET - 1-m Vp-p Output Ripple - - 5 V at 300 m A 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 - Ga As 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 pensation further simplify the use of the LM2611. The LM2611 is available as a small 5-pin, SOT-23 package and es 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). Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) SOT-23 (5) 1.60 mm × 2.90 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Circuit L1 CCUK 15 PH 1 PF 5V L2 47 PH VOUT - 5V 300 m A CIN 22...