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Product details

Parameters

Topology CuK, Inverting Vin (Min) (V) 2.7 Vin (Max) (V) 14 Vout (Min) (V) -1.23 Features Light Load Efficiency Switch current limit (Typ) (A) 1.2 Switching frequency (Min) (kHz) 1400 Switching frequency (Max) (kHz) 1400 Iq (Typ) (mA) 1.8 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

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
open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)

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 &ndash(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).

open-in-new Find other Buck-boost, inverting & split-rail converters (integrated switch)
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Technical documentation

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Type Title Date
* Datasheet LM2611 1.4-MHz Cuk Converter datasheet (Rev. J) Dec. 31, 2015
User guide AN-1203 LM2611 Demoboard (Rev. B) Apr. 24, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
25
Description

1.4MHz Cuk Converter

Features
  • 1.4MHz switching frequency
  • Low RDS(ON) DMOS FET
  • 1mVp-p output ripple
  • -5V at 300mA from 5V input
  • Better regulation than a charge pump
  • Uses tiny capacitors and inductors
  • Wide input range: 2.7V to 14V
  • Low shutdown current: <1uA
  • 5-lead SOT-23 package

 

Design tools & simulation

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CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

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