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Overview
| Topology | Buck Converter |
| Input voltage | 3-5.5 V |
| Output 1 | 5.5 V / 4 A |
| IC revision | 0.1 |
Description
The LX7180A is a 4A step-down regulator with integrated MOSFETs packaged in a space saving QFN12 2mm x 2mm for today’s mobile devices. It uses an ultra fast, constant frequency hysteretic control method to minimize external filter components while maintaining excellent regulation. The LX7180A reference voltage is programmable from 0.6V to 1.195V through a high speed (up to 3.4MHz), bi-directional I2C bus.The LX7180A operates from 3V to 5.5V rails and outputs 0.6V to 100% of the input voltage.Cycle-by-cycle current limiting protects against over-current conditions. Hiccup mode provides protection for heavy over-load or short-circuit faults. Thermal protection shuts down the regulator under over-temperature conditions. Over voltage conditions will immediately shut off the output to protect against permanent damage. The LX7180A automatically restarts when all fault conditions are cleared.
Features
- 0-4A Step-down Regulator
- Operational Input Supply Voltage Range: 3.0V-5.5V (short durations to 6.5V)
- Hysteretic Control Offers Best Transient Response
- PWM Switching at a Constant 1.65MHz
- Power Save Mode (PSM) can be Selected to Improve Light Load Efficiency.
- 100% duty ratio operation
- Input Under Voltage and Over Voltage Protection
- Enable and Power Good Function
- I2C Serial Interface at 3.4Mbps
- Internal soft-start
- Cycle-by-Cycle Over Current Protection
- Hiccup Mode Protects Against Short Circuit Faults
- Seven Bit Adjustable Reference Voltage via I2C Bus
- RoHS Compliant
Typical applications
- High Performance HDD/LCD TV/Server and Workstations
- PoE Powered Devices Smart Phone
- Notebook/Netbook
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Mount | Endurance(h) | IRIPPLE(mA) | RESR(mΩ) | ILeak(µA) | Pitch(mm) | Ø D(mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 10 V(DC), 10 µF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance10 µF | Capacitance±10% | Rated Voltage10 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor10 % | Insulation Resistance0.01 GΩ | Ceramic TypeX7R Class II | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 6.3 V(DC), 22 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 6.3 V(DC) | Capacitance22 µF | Capacitance±20% | Rated Voltage6.3 V (DC) | Size0805 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor15 % | Insulation Resistance0.005 GΩ | Ceramic TypeX5R Class II | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WCAP-PTHR Aluminum Polymer Capacitors, 47 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-PTHR Aluminum Polymer Capacitors | Capacitance47 µF | Capacitance±20% | Rated Voltage35 V (DC) | – | – | Dissipation Factor12 % | – | – | Length11.5 mm | – | – | – | PackagingAmmopack | – | – | – | – | – | – | MountRadial THT | Endurance 2000 | Ripple Current2890 mA | ESR25 mΩ | Leakage Current329 µA | Pitch3.5 mm | Diameter8 mm | ||||
 | WE-LHMI SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | – | – | – | Size5030 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length5.7 mm | Width5.2 mm | Height2.8 mm | – | – | Inductance0.47 µH | Performance Rated Current12.3 A | Saturation Current @ 10%10.8 A | Saturation Current @ 30%21.5 A | DC Resistance7.4 mΩ | Self Resonant Frequency100 MHz | MountSMT | – | – | – | – | – | – |