19-3285; Rev 0; 6/04
High-Side Power and
Current Monitors
General Description
Features
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.
♦ Real-Time Current and Power Monitoring
♦ ±±1.5 ꢀmaꢁx Current-ꢂenꢃe ꢄAAuraAc
♦ ±±1.5 ꢀmaꢁx Power-ꢂenꢃe ꢄAAuraAc
♦ Two UnAommitted Comparatorꢃ ꢀMꢄX42±±x
♦ ±12±V ReferenAe Output ꢀMꢄX42±±x
♦ Three Current/Power Gain Optionꢃ
♦ ±00mV/±.0mV Current-ꢂenꢃe Full-ꢂAale Voltage
♦ +4V to +28V Input ꢂourAe Voltage Range
♦ +217V to +.1.V Power-ꢂupplc Voltage Range
♦ Low ꢂupplc Current: 380µꢄ ꢀMꢄX42±0x
♦ 220kHz Bandwidth
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.
♦ ꢂmall 6-Pin TDFN and 8-Pin µMꢄX PaAkageꢃ
ꢀMꢄX42±0x
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.
Ordering Information
TOP
PꢄRT
TEMP RꢄNGE PIN-PꢄCKꢄGE
MꢄRK
AHF
—
6 TDFN-EP*
-40°C to +85°C
MꢄX42±0AETT
(3mm x 3mm)
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
MAX4210AEUA -40°C to +85°C 8 µMAX
*EP = Exposed paddle.
®
Ordering Information continued at end of data sheet.
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.
Functional Diagrams
V
SENSE
+
-
R
SENSE
Applications
+
-
4V TO
28V
LOAD
RS+
RS-
Overpower Circuit Breakers
Smart Battery Packs/Chargers
Smart Peripheral Control
Short-Circuit Protection
Power-Supply Displays
Measurement Instrumentation
Baseband Analog Multipliers
VGA Circuits
V
CC
+
-
2.7V TO
5.5V
IOUT
25:1
POUT
REF
1.21V
REFERENCE
INHIBIT
CIN1+
COUT1
LE
CIN1-
CIN2+
Power-Level Detectors
COUT2
CIN2-
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX4211A
MAX4211B
MAX4211C
GND
Pin Configurations and Selector Guide appear at end of data
sheet.
Functional Diagrams continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
±
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.