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Overview
| Topology | Buck Converter |
| Input voltage | 3-5.5 V |
| Output 1 | 0.8 V / 5 A |
| IC revision | 0.1 |
Description
The LX7178 is a digitally controlled step-down regulator IC with an integrated 40mΩ high-side P-channel MOSFET and a 14mΩ low-side N-channel MOSFET. It features Microsemi’s proprietary constant-frequency hysteretic control engine for near-instantaneous correction to line/load transients. It does not require high-ESR output capacitors and incorporates energy-saving “PSM” (Power Save or Pulse Skip Mode) at light loads, to extend battery life in mobile applications.The LX7178 has an I2C serial interface port for output voltage margining and monitoring if required (it can also operate in default mode). In addition, it includes robust fault monitoring functions.The LX7178 will operate from 3V to 5.5V, and is available in a fixed output voltage option of 0.8V (no voltage divider is necessary). The output voltage can also be adjusted with an external voltage divider up to 3.3V.
Features
- Constant Frequency Hysteretic Control
- Extremely Fast Line/Load Transient Response
- I2C for Output Adjustment (3.4Mbps)
- 1.875MHz Switching Frequency
- Extremely Low-RDSON MOSFETS
- Input Voltage Rail 3.3V to 5V, Current 5A
- I2C Selectable 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
- Tablets/Slates
- High Performance HDD/Notebook/Netbook
More information
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) | Fl (mm) | 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) | Pins | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012207022 | SPEC | 8 files | WCAP-CSGP MLCCs 10 V(DC) | 1 µF | ±10% | 10 | 0805 | -55 °C up to +125 °C | 5 | 0.5 GΩ | X7R Class II | 2 | 1.25 | 0.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1.25 | – | – | – | 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 | 0.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1.25 | – | – | – | 7" Tape & Reel | ||
| 885012107011 | SPEC | 8 files | WCAP-CSGP MLCCs 10 V(DC) | 22 µF | ±20% | 10 | 0805 | -55 °C up to +85 °C | 10 | 0.005 GΩ | X5R Class II | 2 | 1.25 | 0.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1.25 | – | – | – | 7" Tape & Reel | ||
 | 870055674005 | SPEC | 7 files | WCAP-PTHR Aluminum Polymer Capacitors | 47 µF | ±20% | 35 | – | – | 12 | – | – | 11.5 | – | – | – | – | – | – | – | – | Radial THT | 2000 | -55 °C up to +105 °C | 2890 | 25 | 329 | 3.5 | 8 | – | – | – | – | – | – | Ammopack | ||
 | 744373460022 | SPEC | 8 files | WE-LHMI SMT Power Inductor | – | – | – | 7030 | -40 °C up to +125 °C | – | – | – | 7.3 | 6.6 | – | 0.22 | 23 | 29.9 | 54.3 | 2.8 | 149 | SMT | – | – | – | – | – | – | – | 2 | – | 2.8 | – | – | – | – | ||
 | 61300311121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | -40 °C up to +105 °C | – | 1000 MΩ | – | 7.62 | – | – | – | – | – | – | – | – | THT | – | – | – | – | – | 2.54 | – | 3 | Single | – | Pin Header | Straight | 3 | Bag | |
| 61300411121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | -40 °C up to +105 °C | – | 1000 MΩ | – | 10.16 | – | – | – | – | – | – | – | – | THT | – | – | – | – | – | 2.54 | – | 4 | Single | – | Pin Header | Straight | 3 | Bag |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012207022 | SPEC | |
| 885012107005 | SPEC | |
| 885012107011 | SPEC | |
| 870055674005 | SPEC | |
| 744373460022 | SPEC | |
| 61300311121 | SPEC | – |
| 61300411121 | 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) | Fl (mm) | 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) | Pins | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples |
|---|