LX7302CLQ |
Product Status
In Production |
Overview
| The LX7302 is a single phase step down DC-DC controller IC designed to drive a high side N-channel MOSFET and a low side N-channel synchronous rectifier. The LX7302 uses a fixed ontime hysteretic control approach for fast transient response. Regulation is accomplished on a pulse-by-pulse basis without the need for an integrating error amplifier. The constant on-time is determined by the product of the ratio of the input to output voltage and the user adjustable switching period. The output voltage is programmable by an external reference applied to RS1 (in External Reference Mode) or by the VID pins (in self referenced mode). When using the VID pins, there are four possible reference levels programmed by resistors attached to the RS# pins. A droop function is supported to reduce the output voltage under heavy loads minimizing overshoot upon load release. The LX7302 has protection functions that latch off the power MOSFETs in the event of a fault. Fault conditions are under voltage, over voltage and over temperature. A power good indicator is provided. A cycle-by-cycle current limit will limit the peak current in the lower MOSFET. If the output voltage should drop as a result of sustained current limit, the under voltage detect will trip and shut off the converter. Under voltage lock out (UVLO) keeps the converter off in the event the VCC voltage is too low. |
ROHS| Package Carrier: | Tube |
| Electrical Rating | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage | Vin |
5 | 26 | VDC | |
| Output Voltage (V) | VO | 0.6 | 2.5 | V | |
| Switching Frequency (kHz) | fs | 200 | 1000 | kHz |
| Environmental Rating | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Temperature | TA | 85 | °C |
Resources
| Datasheets | |
|---|---|
 LX7302 Datasheet |
| App Notes | |
|---|---|
| LX7302 Evaluation Board User Guide |
|
| TN-206:Voltage-Mode, Current-Mode (and Hysteretic Control) |
| Literature | |
|---|---|
| Voltage-Mode, Current-Mode (and Hysteretic Control) |
| Reliability | |
|---|---|
| Quality & Reliability Report - Aliso Viejo, CA, USA - Garden Grove, CA, USA - San Jose, CA, USA |
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