hexin-dat
HX4004
HX JE
The HX4004 (commonly marked as HX=JE or HX4004A-MFC) is a low-noise, constant-frequency switched-capacitor DC/DC boost converter. It is widely utilized in battery-powered devices to safely step up a low input voltage (2.8V to 5.0V) into a regulated, stable 5V output.
Applications
- White LED Backlighting
- Li-lon Battery Backup Supplies
- Local 3V to 5V Conversion
- Smart Card Readers
- PCMCIA Local 5V Supplies
The HX4004 is a low noise, constant frequency (400kHz) switched capacitor voltage doubler. It produces a regulated output voltage from a 2.8V to 5.0V input. Low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) make the HX4004 ideally suited for small, battery-powered applications.
The HX4004 have thermal shutdown capability and can survive a continuous short circuit from VOUT to GND. Built-in soft-start circuitry prevents excessive inrush current during start-up.
High switching frequency enables the use of small ceramic capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to <1uA. The HX4004 is available in the SOT-23-6L power packages.