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Overview
| Topology | Buck Converter |
| Input voltage | 2.7-5.5 V |
| Output 1 | 24 V |
Description
The LMR62421 is an easy-to-use, space-efficient 2.1A low-side switch regulator ideal for Boost and SEPIC DC-DC regulation. It provides all the active functions to provide local DC/DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors while providing efficiencies near 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA ideal for portable applications. Tiny 5-pin SOT-23 and 6-pin WSON packages provide space-savings. Additional features include internal soft-start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.
Features
- Input Voltage Range of 2.7V to 5.5V
- Output Voltage up to 24V
- Switch Current up to 2.1A
- 1.6 MHz Switching Frequency
- Low Shutdown Iq, 80 nA
- Cycle-by-Cycle Current Limiting
- Internally Compensated
- Internal Soft-Start
- 5-Pin SOT-23 (2.92 x 2.84 x 1mm) and 6-Pin WSON (3 x 3 x 0.8 mm) Packaging
- Fully Enabled for WEBENCH® Power Designer
Typical applications
- LED Applications
- Boost / SEPIC Conversions from 3.3V, 5V Rails, Space Constrained Applications, Embedded Systems
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | L(µH) | IR(mA) | ISAT(A) | fres(MHz) | Mount | Pins | L(mm) | H(mm) | Working Voltage(V (AC)) | Operating Temperature | Color | Gender | Packaging | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMCW SMT Mono-color Chip LED Waterclear, 630 nm, Super Red | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | Dominant Wavelength [typ.]630 nm | Emitting ColorSuper Red | Peak Wavelength [typ.]645 nm | Luminous Intensity [typ.]60 mcd | Forward Voltage [typ.]1.9 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | – | MountSMT | – | Length2 mm | Height0.7 mm | – | Operating Temperature -40 °C up to +85 °C | – | – | PackagingTape and Reel | – | – | – | – | – | – | ||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | Rated Current500 mA | – | – | MountSMT | – | Length1.6 mm | Height0.8 mm | – | Operating Temperature -55 °C up to +125 °C | – | – | – | Impedance @ 100 MHz100 Ω | Maximum Impedance125 Ω | Maximum Impedance450 MHz | Rated Current 21650 mA | DC Resistance0.15 Ω | TypeWide Band | ||||
 | WE-TPC SMT Tiny Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | – | – | – | – | – | – | – | Inductance3.3 µH | Rated Current1500 mA | Saturation Current1.8 A | Self Resonant Frequency100 MHz | MountSMT | – | Length2.8 mm | Height2.8 mm | – | Operating Temperature -40 °C up to +125 °C | – | – | – | – | – | – | – | DC Resistance0.101 Ω | – | ||||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | – | Rated Current3000 mA | – | – | – | Pins1 | Length2.44 mm | – | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +125 °C | ColorBlack | GenderJumper | PackagingBag | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | – | Rated Current3000 mA | – | – | MountTHT | Pins2 | Length5.08 mm | – | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | – | GenderPin Header | PackagingBag | – | – | – | – | – | TypeStraight | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | – | Rated Current3000 mA | – | – | MountTHT | Pins3 | Length7.62 mm | – | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | – | GenderPin Header | PackagingBag | – | – | – | – | – | TypeStraight |