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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 | 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) | Operating Temperature | IRIPPLE (mA) | RESR (mΩ) | ILeak (µA) | Pitch (mm) | Ø D (mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012207026 | SPEC | 8 files | WCAP-CSGP MLCCs 10 V(DC) | 10 µF | ±10% | 10 | 0805 | -55 °C up to +125 °C | 10 | 0.01 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012107005 | SPEC | 8 files | WCAP-CSGP MLCCs 6.3 V(DC) | 22 µF | ±20% | 6.3 | 0805 | -55 °C up to +85 °C | 10 | 0.005 GΩ | X5R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 870055674005 | SPEC | 7 files | WCAP-PTHR Aluminum Polymer Capacitors | 47 µF | ±20% | 35 | – | – | 12 | – | – | 11.5 | – | – | – | Ammopack | – | – | – | – | – | – | Radial THT | 2000 | -55 °C up to +105 °C | 2890 | 25 | 329 | 3.5 | 8 | ||
 | 744373360047 | SPEC | 8 files | WE-LHMI SMT Power Inductor | – | – | – | 5030 | -40 °C up to +125 °C | – | – | – | 5.7 | 5.2 | 2.8 | – | – | 0.47 | 12.3 | 10.8 | 21.5 | 7.4 | 100 | SMT | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012207026 | SPEC | |
| 885012107005 | SPEC | |
| 870055674005 | SPEC | |
| 744373360047 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | 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) | Operating Temperature | IRIPPLE (mA) | RESR (mΩ) | ILeak (µA) | Pitch (mm) | Ø D (mm) | Samples |
|---|