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MAX4372, MAX4372F, MAX4372H, MAX4372T

Low-Cost, UCSP/SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output

Product Details

Key Features

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 100
150
VOS @25°C (µV) (max) 1300
Output Format Voltage
CMVR (V) (min) 0
CMVR (V) (max) 28
VCC (V) (min) 2.7
VCC (V) (max) 28
ICC (µA) (typ) 30
Bi-Dir. Curr. Sense No
Gain 100 V/V
20 V/V
50 V/V
Gain Accuracy @25°C (%) (max) 2.5
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
SOT23/5
UCSP (B)/6
Budgetary
Price (See Notes)
0.89
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Simplified Block Diagram

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Parameters

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 100
150
VOS @25°C (µV) (max) 1300
Output Format Voltage
CMVR (V) (min) 0
CMVR (V) (max) 28
VCC (V) (min) 2.7
VCC (V) (max) 28
ICC (µA) (typ) 30
Bi-Dir. Curr. Sense No
Gain 100 V/V
20 V/V
50 V/V
Gain Accuracy @25°C (%) (max) 2.5
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
SOT23/5
UCSP (B)/6
Budgetary
Price (See Notes)
0.89

Key Features

  • Low-Cost, Compact Current-Sense Solution
  • 30µA Supply Current
  • 2.7V to 28V Operating Supply
  • 0.18% Full-Scale Accuracy
  • 0.3mV Input Offset Voltage
  • Low 1.5Ω Output Impedance
  • Three Gain Versions Available
    • 20V/V (MAX4372T)
    • 50V/V (MAX4372F)
    • 100V/V (MAX4372H)
  • High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
  • Available in a Space-Saving 5-Pin SOT23 Package and 3 x 2 UCSP™ (1mm x 1.5mm) Package

Applications/Uses

  • Cell Phones
  • General-System/Board-Level Current Monitoring
  • Notebook Computers
  • Portable Battery-Powered Systems
  • Power-Management Systems
  • Precision-Current Sources
  • Smart-Battery Packs/Chargers

Description

The MAX4372 low-cost, precision, high-side current-sense amplifier is available in a tiny, space-saving SOT23 5-pin package. Offered in three gain versions (T = 20V/V, F = 50V/V, and H = 100V/V), this device operates from a single 2.7V to 28V supply and consumes only 30µA. It features a voltage output that eliminates the need for gain-setting resistors and is ideal for today's notebook computers, cell phones, and other systems where battery/DC current monitoring is critical.

High-side current monitoring is especially useful in battery-powered systems since it does not interfere with the ground path of the battery charger. The input common-mode range of 0 to 28V is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a 2-cell battery pack in deep discharge.

The user can set the full-scale current reading by choosing the device (T, F, or H) with the desired voltage gain and selecting the appropriate external sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current-sense solution. For higher bandwidth applications, refer to the MAX4173T/F/H data sheet.

Simplified Block Diagram

MAX4372, MAX4372F, MAX4372H, MAX4372T: Functional Diagram MAX4372, MAX4372F, MAX4372H, MAX4372T: Functional Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .