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Overview
| Topology | Buck Converter |
| Input voltage | 3-5.5 V |
| Output 1 | 5.5 V / 5 A |
| IC revision | 0.1 |
Description
The LX7219 is a digitally controlled step-down regulator IC with an integrated 22mΩ high-side P-channel MOSFET and a 13mΩ low-side N-channel MOSFET. It features Microsemi’s proprietary constant-frequency hysteretic control engine for near-instantaneous correction to sudden line/load transients. It does not require high-ESR output capacitors and incorporates energy-saving “PSM” (Power Saving or Pulse Skip Mode) at light loads, to extend battery life in mobile applications.The LX7219 has an I2C serial interface port for output voltage margining and monitoring if required (it can operate in default mode too). It includes robust fault monitoring functions.The LX7219 will operate from 2.7V to 5.5V, and is available in several fixed output voltage options from 0.9V to 0.8V (no voltage divider is necessary). Each version’s output voltage can also be made adjustable with use of an external voltage divider.
Features
- Constant Frequency Hysteretic Control
- Extremely Fast Line/Load Transient Response
- I2C for Output Adjustment (3.4Mbps)
- 1.2MHz Switching Frequency
- Extremely Low-RDSON MOSFETS
- Input Voltage Rail 2.6V to 5.5V, Current 6A
- Programmable Power Save Mode for Light-Load Efficiency
- UVLO, OVP, OCP
- 0°C to +85°C Ambient Temperature
- Available in WLCSP-20 (0.4mm pitch)
- RoHS Compliant
Typical applications
- LCD TV's
- Notebook/ Netbook
- High Performance HDD/Server and Workstations/Video Cards
- PoE Powered Devices
More information
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) | Pins | Type | IR(A) | Working Voltage(V (AC)) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | – | – | – | Size7030 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length7.3 mm | Width6.6 mm | Height2.8 mm | – | – | Inductance0.33 µH | Performance Rated Current17.8 A | Saturation Current @ 10%27.1 A | Saturation Current @ 30%47 A | DC Resistance3.9 mΩ | Self Resonant Frequency124 MHz | MountSMT | – | – | – | – | – | – | Pins2 | – | – | – | ||||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length7.62 mm | – | – | – | PackagingBag | – | – | – | – | – | – | MountTHT | – | – | – | – | Pitch2.54 mm | – | Pins3 | TypeStraight | Rated Current3 A | Working Voltage250 V (AC) | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length10.16 mm | – | – | – | PackagingBag | – | – | – | – | – | – | MountTHT | – | – | – | – | Pitch2.54 mm | – | Pins4 | TypeStraight | Rated Current3 A | Working Voltage250 V (AC) |