The MAX4172 is a low-cost, precision, high-side current-sense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is criti- cal.
The MAX4172 is a unidirectional, high‑side current‑sense amplifier designed for portable PCs, phones, and battery‑powered systems. It operates from a 3 V to 32 V supply and provides an open‑collector power‑good output to indicate adequate supply voltage.
The device features an external sense resistor for selectable current range, a typical bandwidth of 800 kHz at a 100 mV sense voltage, and is available in space‑saving 8‑pin UMAX or SO packages. Detailed electrical characteristics, pin functions, and suggested component values are provided for design integration.
| Supply Voltage Range | 3 V to 32 V |
|---|---|
| Input Voltage Range | 0 V to 32 V |
| Bandwidth (VSENSE = 100 mV) | 800 kHz |
| Bandwidth (VSENSE = 6.25 mV) | 200 kHz |
| Output Current (max) | 1.75 mA |
The MAX4172 operates from a supply voltage of 3 V to 32 V.
At a 100 mV sense voltage, the MAX4172 provides an 800 kHz bandwidth.