MAX4376:Single/Dual/Quad High-Side Current-Sense Amplifiers with Internal Gain

Industry's-First SOT23 High-Side Current-Sense Amplifier with Buffered Output

The MAX4376/MAX4377/MAX4378 single, dual, and quad precision high-side current-sense amplifiers are available in space-saving packages. They feature buffered voltage outputs that eliminate the need for gain-setting resistors and are ideal for today's notebook computers, cell phones, and other systems where current monitoring is critical. These precision devices are offered in three fixed-gain versions of 20, 50, and 100: GAIN SUFFIX 20 T 50 F 100 H For example, MAX4376TAUK is a single high-side amplifier with a gain of 20. 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 battery pack in deep discharge. The full-scale current reading can be set by choosing the appropriate voltage gain and external-sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current-sense solution. The MAX4376/MAX4377/MAX4378 operate over a supply voltage range of +3V to +28V, draw 1mA of supply current per amplifier, and operate over the full automotive temperature range of -40°C to +125°C. These devices have a wide bandwidth of 2MHz, making them suitable for use inside battery-charger control loops. The buffered outputs drive up to 2mA of output current into a ground-referenced load. The MAX4376 is available in a tiny 5-pin SOT23 package. The MAX4377/MAX4378 are available in space-saving 8-pin µMAX® and 14-pin TSSOP packages, respectively.

Key Features
  • Low-Cost Single/Dual/Quad High-Side Current-Sense Amplifiers
  • ±0.5% Typical Full-Scale Accuracy
  • +3V to +28V Supply Operation
  • Adjustable Current-Sense Capability with External Sense Resistor
  • Buffered Output Voltage with 2mA Drive
  • 1mA (typ) Supply Current
  • 2.0MHz Bandwidth (Gain = +20V/V)
  • Automotive Temperature Range (-40°C to +125°C)
  • High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
  • Three Gain Versions Available
    • +20V/V (MAX437_T)
    • +50V/V (MAX437_F)
    • +100V/V (MAX437_H)
  • Available in Space-Saving 5-pin SOT23 (Single), 8-pin µMAX (Dual), and 14-pin TSSOP (Quad)
MAX4376, MAX4377, MAX4378: Pin Configuration
MAX4376, MAX4377, MAX4378: Pin Configuration
Applications/Uses
  • Automotive Current Detect
  • Battery Chargers
  • Cell Phones
  • Current-Limited Power Supplies
  • Fuel Gauges in PC
  • General-System/Board-Level Current Monitoring
  • Notebook Computers
  • PA Bias Control
  • Portable/Battery-Powered Systems
  • Power-Management Systems
  • Smart Battery Packages
DataSheet
titleDownload file
MAX4376-MAX4378 Data SheetMAX4376-MAX4378.pdf
Parametrics
Part NumberOutput FormatCMVR
(V)
CMVR
(V)
VCC
(V)
VCC
(V)
ICC
(µA)
Bi-Dir. Curr. SenseVSENSE_FS
(mV)
GainGain Accuracy @25°C
(%)
BW
(kHz)
Comp-
arators
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtyprecomm.max@ -3dBSee Notes
MAX4376Voltage0283281000No15020 V/V
50 V/V
100 V/V
2.51200
1700
2000
0-40 to +125SOIC(N)/8
SOT/5
$0.92 @1k
MAX4377µMAX/8
SOIC(N)/8
$1.34 @1k
MAX4378SOIC(N)/14
TSSOP/14
$1.46 @1k
Quality and Environmental Data
Related Products
  • MAX4173T:Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
  • MAX4173H:Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
  • MAX4173F:Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4376FASANo Longer AvailableMAX4376FASA+SOIC(N),;8 pin;30.9 mm²-40°C to +125°CNo
MAX4376FASA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX4376FASA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX4376FASA-TNo Longer AvailableMAX4376FASA+TN.SO;8 pin-40°C to +125°CSee data sheet
MAX4376FAUKNo Longer AvailableMAX4376FAUK+SOT,;5 pin;9 mm²-40°C to +125°CNo
MAX4376FAUK+ActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376FAUK+TActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376FAUK-TNo Longer AvailableMAX4376FAUK+TSOT,;5 pin;9 mm²-40°C to +125°CNo
MAX4376HASANo Longer AvailableMAX4376HASA+SOIC(N),;8 pin;30.9 mm²-40°C to +125°CNo
MAX4376HASA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4376HASA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX4376HASA-TNo Longer AvailableMAX4376HASA+TN.SO;8 pin-40°C to +125°CSee data sheet
MAX4376HAUK+ActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376HAUK+TActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376HAUK-TNo Longer AvailableMAX4376HAUK+TSOT,;5 pin;9 mm²-40°C to +125°CNo
MAX4376HAUK/V+ActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376HAUK/V+TActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376TASANo Longer AvailableMAX4376TASA+SOIC(N),;8 pin;30.9 mm²-40°C to +125°CNo
MAX4376TASA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX4376TASA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4376TASA-TNo Longer AvailableMAX4376TASA+TSOIC(N),;8 pin;30.9 mm²-40°C to +125°CNo
MAX4376TAUK+ActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376TAUK+TActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX4376TAUK-TNo Longer AvailableMAX4376TAUK+SOT,;5 pin;9 mm²-40°C to +125°CNo
MAX4376-MAX4378.pdf MAX4378
Simple Current Limiter Is Programmable MAX4376
MAX4376.pdf MAX4376
MAX4376-MAX4378.pdf MAX4378