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LM2611
  • LM2611
  • LM2611
  • LM2611

LM2611

ACTIVE

1.4MHz Cuk Converter

Texas Instruments LM2611 Product Info

1 April 2026 3

Parameters

Rating

Catalog

Topology

CuK, Inverting

Vin (max) (V)

14

Vin (min) (V)

2.7

Vout (max) (V)

-1.23

Vout (min) (V)

-32

Switch current limit (typ) (A)

1.2

Features

Light-load efficiency

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0018

Package

SOT-23 (DBV)-5-8.12 mm² 2.9 x 2.8

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
  • 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

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).

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