The marking (often referred to as ) identifies the ) integrated circuit. This is a low-noise, constant-frequency DC-DC charge pump
Switching node; connects to the external inductor and diode. 3 GND Ground reference. 4 VOUT Boosted output voltage pin. 5 EN Enable pin; pulls high to turn on the IC, low to disable. 6 FB Feedback pin for closed-loop voltage regulation. 7 (if present) NC No connection (often reserved for specific variations). Key Features & Applications
Design checklist for selecting an HXJE IC hxje ic datasheet top
Passive Component Clusters: Are there large inductors and capacitors nearby? This strongly implies a power management role, such as a buck or boost converter. High-frequency crystal oscillators or termination resistors point toward high-speed digital processing.
Low Noise: Its synchronous architecture and constant frequency minimize electromagnetic interference (EMI), making it suitable for sensitive electronics. Common Applications The marking (often referred to as ) identifies
If you are designing a circuit around the HXJE/BQ24040, these are the must-know specs:
Internal Sensing: Unlike traditional boost controllers, the HX-JE is "non-sensing," meaning it reduces the need for external feedback resistors or sensing networks in certain configurations, making it a "plug-and-play" solution for simple voltage stepping. 4 VOUT Boosted output voltage pin
When an engineer or researcher handles an IC labeled solely with a cryptic identifier like HXJE, standard search queries often fail to return a manufacturer datasheet. This paper establishes a repeatable, non-destructive (and semi-destructive) methodology to characterize such "ghost" components. 2. Phase I: Top-Level Physical Marking Analysis