MAX4172：Low-Cost, Precision, High-Side Current-Sense Amplifier
Low-cost, Precision Current Monitoring For Portable Battery-Powered Applications
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 critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the battery charger's ground path. Wide bandwidth and ground-sensing capability make the MAX4172 suitable for closed-loop battery-charger and general-purpose current-source applications. The 0 to 32V input common-mode range is independent of the supply voltage, which ensures that current-sense feedback remains viable, even when connected to a battery in deep discharge. To provide a high level of flexibility, the MAX4172 functions with an external sense resistor to set the range of load current to be monitored. It has a current output that can be converted to a ground-referred voltage with a single resistor, accommodating a wide range of battery voltages and currents. An open-collector power-good output (active-low PG) indicates when the supply voltage reaches an adequate level to guarantee proper operation of the current-sense amplifier. The MAX4172 operates with a 3.0V to 32V supply voltage, and is available in a space-saving, 8-pin µMAX® or SO package.
Key Features
| MAX4172: Functional Diagram Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| MAX4172 Data Sheet | MAX4172.pdf |
Parametrics
| Part Number | Output Format | CMVR (V) | CMVR (V) | VCC (V) | VCC (V) | ICC (µA) | Bi-Dir. Curr. Sense | VSENSE_FS (mV) | VOS @25°C (µV) | Gain | Gain Accuracy @25°C (%) | BW (kHz) | Comp- arators | Oper. Temp. (°C) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | typ | recomm. | max | max | @ -3dB | See Notes | |||||||
| MAX4172 | Current | 0 | 32 | 3 | 32 | 800 | No | 150 | 750 | 10 µA/mV | 2 | 800 | 0 | -40 to +85 | µMAX/8 SOIC(N)/8 | $2.21 @1k |
Quality and Environmental Data
Related Products
- MAX4071：Bidirectional, High-Side, Current-Sense Amplifiers with Reference
- MAX4070：Bidirectional, High-Side, Current-Sense Amplifiers with Reference
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- MAX4375：Low-Cost, Micropower, High-Side Current-Sense Amplifier + Comparator + Reference ICs
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Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX4172ESA | No Longer Available | MAX4172ESA+ | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | No |
| MAX4172ESA+ | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX4172ESA+T | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX4172ESA-T | No Longer Available | MAX4172ESA+T | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | No |
| MAX4172EUA | No Longer Available | MAX4172EUA+ | µMAX,;8 pin;15.6 mm² | -40°C to +85°C | No |
| MAX4172EUA+ | Active | µMAX,;8 pin;15.6 mm² | -40°C to +85°C | Lead Free | |
| MAX4172EUA+T | Active | µMAX,;8 pin;15.6 mm² | -40°C to +85°C | Lead Free | |
| MAX4172EUA-T | No Longer Available | MAX4172EUA+T | µMAX,;8 pin;15.6 mm² | -40°C to +85°C | No |
| MAX4172GUA+ | Active | µMAX,;8 pin;15.6 mm² | -40°C to +105°C | Lead Free | |
| MAX4172GUA+T | Active | µMAX,;8 pin;15.6 mm² | -40°C to +105°C | Lead Free |
- MAX4172.pdf MAX4172
- MAX4172.pdf MAX4172
- MAX4172.pdf MAX4172
- Derive Simple High-Current Source from Lab Supply MAX4172
- Moving-Coil Meter Measures Low-Level Currents MAX4172
- High-Side Current-Sense Amplifier Operates at High Voltage MAX4172
- High-Side Positive Current Sensor Monitors Negative Supply MAX4172
- Overload Circuitry Protects Batteries and Power Supplies MAX4172
- Overcurrent Monitor Operates up to 26V MAX4172
- MAX4172.pdf MAX4172
