Product details
Parameters
Package | Pins | Size
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
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).
Technical documentation
| 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
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
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOT-23 (DBV) | 5 | View options |
Ordering & quality
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