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LM2611

Texas Instruments
Part Number LM2611
Manufacturer Texas Instruments
Description 1.4-MHz Cuk Converter
Published Feb 21, 2020
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2611 SNOS965J – JUNE 2001 – ...
Datasheet PDF File LM2611 PDF File

LM2611
LM2611

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2611 SNOS965J – JUNE 2001 – REVISED DECEMBER 2015 LM2611 1.
4-MHz Cuk Converter 1 Features •1 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).
Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM2611 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 VIN 5V L2 47 PH VOUT - 5V 300 mA CIN 22 PF 5 VIN 4 SHDN 1 SW LM2611A NFB RFB1 29.
4k 3 GND 2 RFB2 10k CFF 330 pF D COUT 22 PF ...


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