MAX4210 Datasheet, PDF (1/32 Pages) Maxim Integrated Products – High-Side Power and Current Monitors

19-3285; Rev 0; 6/04
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High-Side Power and
Current Monitors
General Description
The MAX4210/MAX4211 low-cost, low-power, high-side
power/current monitors provide an analog output volt-
age proportional to the power consumed by a load by
multiplying load current and source voltage. The
MAX4210/MAX4211 measure load current by using a
high-side current-sense amplifier, making them espe-
cially useful in battery-powered systems by not interfer-
ing with the ground path of the load.
The MAX4210 is a small, simple 6-pin power monitor
intended for limited board space applications. The
MAX4210A/B/C integrate an internal 25:1 resistor-divider
network to reduce component count. The MAX4210D/E/F
use an external resistor-divider network for greater design
flexibility.
The MAX4211 is a full-featured current and power mon-
itor. The device combines a high-side current-sense
amplifier, 1.21V bandgap reference, and two compara-
tors with open-drain outputs to make detector circuits
for overpower, overcurrent, and/or overvoltage condi-
tions. The open-drain outputs can be connected to
potentials as high as 28V, suitable for driving high-side
switches for circuit-breaker applications.
Both the MAX4210/MAX4211 feature three different cur-
rent-sense amplifier gain options: 16.67V/V, 25.00V/V, and
40.96V/V. The MAX4210 is available in 3mm x 3mm, 6-pin
TDFN and 8-pin µMAX^® packages and the MAX4211 is
available in 4mm x 4mm, 16-pin thin QFN and 16-pin
TSSOP packages. Both parts are specified for the -40°C
to +85°C extended operating temperature range.
Applications
Overpower Circuit Breakers
Smart Battery Packs/Chargers
Smart Peripheral Control
Short-Circuit Protection
Power-Supply Displays
Measurement Instrumentation
Baseband Analog Multipliers
VGA Circuits
Power-Level Detectors
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations and Selector Guide appear at end of data
sheet.
Features
♦ Real-Time Current and Power Monitoring
♦ ±1.5% (max) Current-Sense Accuracy
♦ ±1.5% (max) Power-Sense Accuracy
♦ Two Uncommitted Comparators (MAX4211)
♦ 1.21V Reference Output (MAX4211)
♦ Three Current/Power Gain Options
♦ 100mV/150mV Current-Sense Full-Scale Voltage
♦ +4V to +28V Input Source Voltage Range
♦ +2.7V to +5.5V Power-Supply Voltage Range
♦ Low Supply Current: 380µA (MAX4210)
♦ 220kHz Bandwidth
♦ Small 6-Pin TDFN and 8-Pin µMAX Packages
(MAX4210)
Ordering Information
PART
MAX4210AETT
TEMP RANGE PIN-PACKAGE
-40°C to +85°C
6 TDFN-EP*
(3mm x 3mm)
TOP
MARK
AHF
MAX4210AEUA -40°C to +85°C 8 µMAX
—
*EP = Exposed paddle.
Ordering Information continued at end of data sheet.
Functional Diagrams
4V TO +
28V -
VCC
2.7V TO +
5.5V -
+
VSENSE
-
RSENSE
RS+
RS-
LOAD
25:1
IOUT
POUT
1.21V
REF
REFERENCE
INHIBIT
COUT1
LE
CIN1+
CIN1-
COUT2
MAX4211A
MAX4211B
MAX4211C
GND
CIN2+
CIN2-
Functional Diagrams continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.