19-3285; Rev 1; 5/05
KITS
ATION
EVALU ABLE
AVAIL
High-Side Power and
Current Monitors
General Description
Features
o
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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)
MAX4210/MAX4211
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.
Ordering Information
PART
MAX4210AETT-T
MAX4210AEUA
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
6 TDFN-6-EP*
(3mm x 3mm)
TOP
MARK
AHF
—
-40°C to +85°C 8 µMAX
*EP
= Exposed paddle.
Ordering Information continued at end of data sheet.
Functional Diagrams
+
V
SENSE
R
SENSE
LOAD
RS+
V
CC
2.7V TO
5.5V
RS-
-
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
4V TO
28V
+
-
+
-
25:1
IOUT
POUT
1.21V
REFERENCE
INHIBIT
REF
CIN1+
COUT1
CIN1-
LE
CIN2+
COUT2
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations and Selector Guide appear at end of data
sheet.
MAX4211A
MAX4211B
MAX4211C
GND
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.
High-Side Power and
Current Monitors
MAX4210/MAX4211
ABSOLUTE MAXIMUM RATINGS
V
CC
, IN, CIN1, CIN2 to GND ....................................-0.3V to +6V
RS+, RS-, INHIBIT, LE, COUT1, COUT2 to GND ...-0.3V to +30V
IOUT, POUT, REF to GND ..........................-0.3V to (V
CC
+ 0.3V)
Differential Input Voltage (V
RS+
- V
RS-
) .................................±5V
Maximum Current into Any Pin..........................................±10mA
Output Short-Circuit Duration to V
CC
or GND ........................10s
Continuous Power Dissipation (T
A
= +70°C)
6-Pin TDFN (derate 24.4mW/°C above +70°C) ..........1951mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW
16-Pin TSSOP (derate 9.4mW/°C above +70°C) ..........754mW
16-Pin Thin QFN (derate 25mW/°C above +70°C) .....2000mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= 5.0V, V
RS+
= 25V, V
SENSE
= 5mV, V
IN
= 1.0V, V
LE
= 0V, R
IOUT
= R
POUT
= 1MΩ,
V
CIN1+
= V
CIN2+
= V
REF
, V
CIN1-
= V
CIN2-
=
GND, V
INHIBIT
= 0V, R
COUT1
= R
COUT2
= 5kΩ connected to V
CC
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Operating Voltage Range
(Note 2)
Common-Mode Input Range
(Note 3)
SYMBOL
V
CC
V
CMR
Measured at RS+
T
A
= +25°C,
V
CC
= +5.5V
V
CC
= +5.5V
I
RS+
I
RS-
I
IN
I
RS+
, I
RS-
V
SENSE_FS
V
IN_FS
V
IN
V
SENSE
= 0mV
V
SENSE
= 0mV
MAX421_D/E/F
V
CC
= 0V
MAX421_A/B/D/E
MAX421_C/F
MAX421_D/E/F, V
SENSE
= 10mV to
100mV
MAX421_D/E/F, V
SENSE
= 10mV to
100mV
MAX421_A/B/C, V
SENSE
= 10mV to
100mV
V
RS+
MAX421_A/B/C, V
SENSE
= 10mV to
100mV
Current into IOUT = 10µA
Minimum IOUT/POUT Voltage
V
OUT_MIN
V
SENSE
=
0V, V
RS+
=
25V
Current into IOUT = 100µA
Current into POUT = 10µA
Current into POUT = 100µA
Maximum IOUT/POUT Voltage
(Note 6)
V
SENSE
=
300mV,
V
RS+
= 25V
Current out of
IOUT = 500µA
Current out of
POUT = 500µA
150
100
1
0.16
25
4
1.5
2.5
1.5
2.5
80
V
CC
-
0.25
V
CC
-
0.25
80
mV
28
1.10
MAX4210
MAX4211
MAX4210
MAX4211
MAX421_A/B/C
MAX421_D/E/F
14
3
3
-0.1
0.1
CONDITIONS
MIN
2.7
4
380
670
TYP
MAX
5.5
28
570
960
670
1100
25
8
8
-1
1
µA
µA
µA
mV
V
V
V
V
µA
UNITS
V
V
Supply Current
I
CC
Input Bias Current
IN Input Bias Current
Leakage Current
V
SENSE
Full-Scale Voltage
(Note 4)
IN Full-Scale Voltage
(Note 4)
IN Input Voltage Range
(Note 5)
V
RS+
Full-Scale Voltage
(Note 4)
V
RS+
Input Voltage Range
(Note 5)
V
OUT_MAX
V
2
_______________________________________________________________________________________
High-Side Power and
Current Monitors
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5.0V, V
RS+
= 25V, V
SENSE
= 5mV, V
IN
= 1.0V, V
LE
= 0V, R
IOUT
= R
POUT
= 1MΩ, V
CIN1+
= V
CIN2+
= V
REF
, V
CIN1-
= V
CIN2-
=
GND, V
INHIBIT
= 0V, R
COUT1
= R
COUT2
= 5kΩ connected to V
CC
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Current-Sense Amplifier Gain
SYMBOL
MAX4211A/D
V
IOUT
/
V
SENSE
V
POUT
/
(V
SENSE
x
V
RS+
)
Power-Sense Amplifier Gain
V
POUT
/
(V
SENSE
x V
IN
)
IOUT Common-Mode Rejection
POUT Common-Mode Rejection
IOUT Power-Supply Rejection
POUT Power-Supply Rejection
Output Resistance for POUT,
IOUT, REF
IOUT -3dB Bandwidth
CMRI
CMRP
PSRI
PSRP
R
OUT
BW
IOUT/SENSE
V
SENSE
= 100mV, V
SENSE
AC source
V
SENSE
= 100mV, V
IN
AC source,
MAX421_D/E/F
V
SENSE
= 100mV, V
RS+
AC source,
MAX421_A/B/C
No sustained oscillations
MAX4211
V
SENSE
= 10mV to 100mV
V
SENSE
= 100mV to 10mV
V
SENSE
= 10mV to 100mV
V
SENSE
= 100mV to 10mV
MAX421_A/B/C
V
RS+
= 4V to 25V,
V
SENSE
= 100mV
V
RS+
= 25V to 4V,
V
SENSE
= 100mV
V
SENSE
= 10mV to 100mV
V
SENSE
= 100mV to 10mV
MAX421_D/E/F
V
IN
= 160mV to 1V,
V
SENSE
= 100mV
V
IN
= 1V to 160mV,
V
SENSE
= 100mV
MAX4211B/E
MAX4211C/F
MAX421_A
MAX421_B
MAX421_C
MAX421_D
MAX421_E
MAX421_F
MAX4211, V
RS+
= 4V to 28V
MAX421_D/E/F, V
RS+
= 4V to 28V
V
CC
= 2.7V to 5.5V
V
CC
= 2.7V to 5.5V
60
60
52
52
CONDITIONS
MIN
TYP
16.67
25.00
40.96
0.667
1.00
1.64
16.67
25.00
40.96
80
80
80
70
0.5
220
220
500
250
450
15
15
10
10
15
15
10
10
10
10
µs
pF
µs
kHz
dB
dB
dB
dB
Ω
kHz
1/V
V/V
MAX
UNITS
MAX4210/MAX4211
BW
POUT/SENSE
V
SENSE
= 100mV, V
SENSE
AC source
POUT -3dB Bandwidth
BW
POUT/VIN
BW
POUT/RS+
Capacitive-Load Stability
(POUT, IOUT, REF)
Current Output (IOUT) Settling
Time to 1% of Final Value
C
LOAD
Power Output (POUT) Settling
Time to 1% of Final Value
_______________________________________________________________________________________
3
High-Side Power and
Current Monitors
MAX4210/MAX4211
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5.0V, V
RS+
= 25V, V
SENSE
= 5mV, V
IN
= 1.0V, V
LE
= 0V, R
IOUT
= R
POUT
= 1MΩ, V
CIN1+
= V
CIN2+
= V
REF
, V
CIN1-
= V
CIN2-
=
GND, V
INHIBIT
= 0V, R
COUT1
= R
COUT2
= 5kΩ connected to V
CC
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Power-Up Time to 1% of
Current Output Final Value
Power-Up Time to 1% of Power
Output Final Value
Saturation Recovery Time for
Current Out (Note 7)
SYMBOL
CONDITIONS
V
SENSE
= 100mV, C
LOAD
= 10pF,
MAX4211
V
SENSE
= 100mV, C
LOAD
= 10pF
C
LOAD
= 10pF, V
SENSE
= -100mV to
+100mV
C
LOAD
= 10pF, V
SENSE
= 1.5V to 100mV
Saturation Recovery Time for
Power Out (Note 7)
V
CC
= 5V, V
RS+
= 10V, C
LOAD
= 10pF,
V
SENSE
= -100mV to +100mV
V
CC
= 5V, V
RS+
= 10V, C
LOAD
= 10pF,
V
SENSE
= 1.5V to 100mV
V
REF
I
REF
= 0 to 100µA, T
A
= +25°C
I
REF
= 0 to 100µA, T
A
= -40°C to +85°C
Common-mode voltage = REF
1.20
1.19
±0.5
5
Functional test
Functional test
I
BIAS
V
OL
I
SINK
= 1mA
V
PULLUP
= 28V
V
IH
V
IL
0.68
1.3
0.5
0.6
0.68
1
2.20
1
0.67 x
V
CC
0.33 x
V
CC
2.20
0.1
V
CC
-
1.15
-2
0.2
0.6
1
MIN
TYP
100
100
35
35
25
µs
25
1.21
1.22
1.23
±5
V
mV
mV
V
V
nA
V
µA
V
V
µA
V
V
V
µA
MAX
UNITS
µs
µs
µs
Reference Voltage
Comparator Input Offset
Comparator Hysteresis
Comparator Common-Mode
Low
Comparator Common-Mode
High
Comparator Input Bias Current
Comparator Output Low
Voltage
Comparator Output-High
Leakage Current (Note 8)
LE Logic Input-High Voltage
Threshold
LE Logic Input-Low Voltage
Threshold
LE Logic Input Internal
Pulldown Current
INHIBIT Logic Input-High
Voltage Threshold
INHIBIT Logic Input-Low
Voltage Threshold
INHIBIT Logic Input Hysteresis
INHIBIT Logic Input Internal
Pulldown Current
4
_______________________________________________________________________________________
High-Side Power and
Current Monitors
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5.0V, V
RS+
= 25V, V
SENSE
= 5mV, V
IN
= 1.0V, V
LE
= 0V, R
IOUT
= R
POUT
= 1MΩ, V
CIN1+
= V
CIN2+
= V
REF
, V
CIN1-
= V
CIN2-
=
GND, V
INHIBIT
= 0V, R
COUT1
= R
COUT2
= 5kΩ connected to V
CC
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Comparator Propagation
Delay
Minimum INHIBIT Pulse
Width
Minimum LE Pulse Width
Comparator Power-Up
Blanking Time From V
CC
LATCH Setup Time
t
ON
t
SETUP
V
CC
from 0 to (2.7V to 5.5V)
SYMBOL
t
PD+
, t
PD-
CONDITIONS
C
LOAD
= 10pF, R
LOAD
= 10kΩ pullup to
V
CC
, 5mV overdrive
MIN
TYP
4
1
1
300
3
±0.5
±1.5
±3.0
±0.5
±1.5
±3.0
±0.15
±1.5
% FSO*
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
±2.5
±1.2
±1.8
±1.8
1.5
5
15
±0.5
±1.5
±3.0
±0.5
±1.5
±3.0
%
mV
±0.2
±3.0
±1.5
±3.0
%
%
MAX
UNITS
µs
µs
µs
µs
µs
MAX4210/MAX4211
MAX4210A/MAX4211A (power gain = 0.667)
∆V
POUT
/
∆V
SENSE
∆V
POUT
/
∆V
RS+
∆V
POUT_MAX
/
FSO
V
SENSE
= 10mV to
100mV, V
RS+
= 25V
V
SENSE
= 100mV,
V
RS+
= 5V to 25V
V
SENSE
= 5mV to
100mV, V
RS+
= 5V to
25V
V
SENSE
= 150mV,
V
RS+
≥
15V
∆V
POUT_MAX
/
V
POUT
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
POUT Gain Accuracy
(Note 9)
Total POUT Output Error
(Note 10)
V
SENSE
= 100mV, V
RS+
≥
4V
V
SENSE
= 100mV, V
RS+
≥
9V
V
SENSE
= 50mV, V
RS+
≥
6V
V
SENSE
= 25mV, V
RS+
≥
15V
POUT Output Offset Voltage
(Note 11)
MAX4210B/MAX4211B (power gain = 1.00)
∆V
POUT
/
∆V
SENSE
∆V
POUT
/
∆V
RS+
V
SENSE
= 0V,
V
RS+
= 25V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
POUT Gain Accuracy
(Note 9)
V
SENSE
= 10mV to
100mV, V
RS+
= 25V
V
SENSE
= 100mV,
V
RS+
= 5V to 25V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
*FSO
refers to full-scale output under the conditions: V
SENSE
= 100mV, V
RS+
= +25V, or V
IN
= 1V.
_______________________________________________________________________________________
5
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