MAX4372F

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


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.

MAX4372, MAX4372F, MAX4372H, MAX4372T: Functional Diagram MAX4372, MAX4372F, MAX4372H, MAX4372T: Functional Diagram Enlarge+

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
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
MAX4372  Voltage 0 28 2.7 28 30 No
100
150
1300
20 V/V
50 V/V
100 V/V
2.5
110
200
275
0 -40 to +85
SOIC(N)/8
SOT/5
UCSP/6
$0.75 @1k
See All Current Sense Amplifiers (45)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX9928EVKIT: Evaluation Kit for the MAX9928F, MAX9929F, and MAX4372

Quality and Environmental Data

Product Reliability Reports: MAX4372F.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

MAX4372F Macromodel
MAX4372F Orcad Library
MAX4372FGBW Test Circuit File
MAX4372FLTR Test Circuit File
MAX4372FPSRR Test Circuit File

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