Datasheet

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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

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)

MAX4210/MAX4211

High-Side Power and

Current Monitors

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

MAX4211A

MAX4211B

MAX4211C

IOUT

RS-RS+

SENSE

LOAD

1.21V

REFERENCE

POUT

REF

2.7V TO

5.5V

4V TO

28V

CIN1+

INHIBIT

COUT1

COUT2

CIN1-

CIN2+

CIN2-

GND

25:1

PART TEMP RANGE PIN-PACKAGE

TOP

MARK

MAX4210AETT-T -40°C to +85°C

6 TDFN-6-EP*

(3mm x 3mm)

AHF

MAX4210AEUA -40°C to +85°C 8 µMAX —

Functional Diagrams

19-3285; Rev 1; 5/05

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.

*EP = Exposed paddle.

Ordering Information continued at end of data sheet.

Pin Configurations and Selector Guide appear at end of data

sheet.

EVALUATION KITS

AVAILABLE

Functional Diagrams continued at end of data sheet.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

Summary of content (32 pages)

PAGE 1
9-3285; Rev 1; 5/05 KITS ATION EVALU ABLE AVAIL High-Side Power and Current Monitors The MAX4210/MAX4211 low-cost, low-power, high-side power/current monitors provide an analog output voltage 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 especially useful in battery-powered systems by not interfering with the ground path of the load.
PAGE 2
MAX4210/MAX4211 High-Side Power and Current Monitors ABSOLUTE MAXIMUM RATINGS VCC, 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 (VCC + 0.3V) Differential Input Voltage (VRS+ - VRS-) .................................±5V Maximum Current into Any Pin..........................................±10mA Output Short-Circuit Duration to VCC or GND ........................
PAGE 3
High-Side Power and Current Monitors (VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Current-Sense Amplifier Gain SYMBOL VIOUT/ VSENSE VPOUT/ (VSENSE x VRS+) Power-Sense Amplifier Gain VPOUT/ (VSENSE x VIN) CONDITIONS MIN TYP MAX4211A/D 16.
PAGE 4
MAX4210/MAX4211 High-Side Power and Current Monitors ELECTRICAL CHARACTERISTICS (continued) (VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.
PAGE 5
High-Side Power and Current Monitors (VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.
PAGE 6
MAX4210/MAX4211 High-Side Power and Current Monitors ELECTRICAL CHARACTERISTICS (continued) (VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.
PAGE 7
High-Side Power and Current Monitors (VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.
PAGE 8
MAX4210/MAX4211 High-Side Power and Current Monitors ELECTRICAL CHARACTERISTICS (continued) (VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX ±0.5 ±1.5 ±0.5 ±1.5 UNITS MAX4210F/MAX4211F (power gain = 40.
PAGE 9
High-Side Power and Current Monitors (VCC = 5.0V, VRS+ = 25V, VSENSE = 5mV, VIN = 1.0V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = GND, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX ±0.5 ±1.5 UNITS MAX4211B/MAX4211E (current gain = 25.
PAGE 10
Typical Operating Characteristics (VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. COMMON-MODE VOLTAGE 0.5 0.7 MAX4211 0.6 0.5 MAX4210 0.4 VSENSE = 5mV VCC = 5V 0.45 VCC = 5.5V VCC = 4.0V 0.40 0.35 0.30 VCC = 2.7V MAX4210 0.3 0.25 0.2 0.3 3.1 3.5 3.9 4.3 4.7 5.1 4 5.5 8 12 24 0.
PAGE 11
High-Side Power and Current Monitors TA = +25°C -1.2 -1.4 0.2 0 -0.2 -0.6 -1.8 -0.8 -2.0 -1.0 25 50 75 100 125 TA = +25°C TA = +85°C -0.4 -1.6 0 10 16 19 22 -1.4 25 0 200 400 24.90 24.85 MAX4211E 24.90 24.85 24.80 85 1000 MAX4211D VSENSE = 100mV 2.0 1.5 VSENSE = 70mV VSENSE = 30mV 1.0 0.5 0 -40 -15 10 35 60 0 85 0.3 0.6 0.9 1.2 TEMPERATURE (°C) IN VOLTAGE (V) MULTIPLIER TRANSFER CHARACTERISTICS MULTIPLIER TRANSFER CHARACTERISTICS REFERENCE VOLTAGE vs.
PAGE 12
Typical Operating Characteristics (continued) (VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = +25°C, unless otherwise noted.) COMPARATOR PROPAGATION DELAY vs. OVERDRIVE VOLTAGE 1.210 1.205 1.4 1.2 1.0 0.8 0.6 0.4 1.8 MAX4210/11 toc21 1.6 PROPAGATION DELAY (µs) 1.215 MAX4210/11 toc20 1.8 MAX4210/11 toc19 REFERENCE VOLTAGE (V) 1.
PAGE 13
High-Side Power and Current Monitors IOUT POWER-UP DELAY VCC POWER-UP/DOWN RESPONSE POUT MAX4210/11 toc28 MAX4211E MAX4210/11 toc29 5V VCC 2V/div VSENSE = 150mV MAX4211E VCC 2V/div 0V 0V 2.5V IOUT 1V/div POUT 2V/div 0V 0V 200µs/div 2ms/div VCC POWER-UP/DOWN RESPONSE IOUT RS POWER-UP/DOWN RESPONSE POUT MAX4210/11 toc30 MAX4210/11 toc31 VSENSE = 150mV MAX4211E 10V VRS+ 5V/div VCC 2V/div 0V VSENSE 0V 2.
PAGE 14
Typical Operating Characteristics (continued) (VCC = 5.0V, VRS+ = 25V, VSENSE = 100mV, VIN = 1V, VLE = 0V, RIOUT = RPOUT = 1MΩ, VCIN1+ = VCIN2+ = VREF, VCIN1- = VCIN2- = 0V, VINHIBIT = 0V, RCOUT1 = RCOUT2 = 5kΩ connected to VCC, TA = +25°C, unless otherwise noted.
PAGE 15
High-Side Power and Current Monitors -10 -20 PSR (dB) -50 -60 -40 15 10 -60 -80 5 -70 0 0.001 -80 10 1 0.1 100 1k 100k 10k VSENSE = 10mVP-P 30 25 20 10 VSENSE = 90mVP-P GAIN (dB) 20 15 15 10 10 5 5 0.01 0.1 1 0 0.001 10 0.01 1 0.1 FREQUENCY (MHz) FREQUENCY (MHz) IOUT LARGE-SIGNAL GAIN vs. FREQUENCY IN SMALL-SIGNAL GAIN vs. FREQUENCY 5 MAX4210/11 toc45 30 VSENSE = 90mVP-P 0 GAIN (dB) 20 15 -5 MAX4210/11 toc46 0 0.001 25 1 POUT LARGE-SIGNAL GAIN vs.
PAGE 16
MAX4210/MAX4211 High-Side Power and Current Monitors MAX4210A/B/C Pin Description PIN 6 TDFN 8 µMAX NAME FUNCTION 1 1 GND Ground 2 2, 3, 6 N.C. No Connection. Not internally connected. 3 4 VCC Power-Supply Voltage. Connect a 0.1µF bypass capacitor from VCC to GND. 4 5 RS+ Power Connection to External-Sense Resistor and Internal Resistor-Divider 5 7 RS- Load-Side Connection for External-Sense Resistor 6 8 POUT EP — EP* Power Output Voltage.
PAGE 17
High-Side Power and Current Monitors PIN NAME FUNCTION 16 THIN QFN 16 TSSOP 1 3 VCC Power-Supply Voltage. Connect a 0.1µF bypass capacitor from VCC to GND. 2 4 N.C. No Connection. Not internally connected. 3 5 LE 4 6 COUT1 Open-Drain Comparator 1 Output. LE and INHIBIT control the comparator 1 output. 5 7 INHIBIT INHIBIT for Comparator 1 Output. Driving logic high inhibits the comparator operation. Drive logic low for normal operation.
PAGE 18
MAX4210/MAX4211 High-Side Power and Current Monitors MAX4211D/E/F Pin Description PIN NAME FUNCTION 16 THIN QFN 16 TSSOP 1 3 VCC 2 4 IN Multiplier Input Voltage. Voltage input for internal multiplier. 3 5 LE Latch Enable for Comparator 1. Driving logic low makes the comparator transparent (regular comparator). Driving logic high latches the output. 4 6 COUT1 Open-Drain Comparator 1 Output. Output controlled by LE and INHIBIT. INHIBIT for Comparator 1 Output.
PAGE 19
High-Side Power and Current Monitors VSENSE + 4V TO 28V - RSENSE + - LOAD RS+ 4V TO 28V - RSENSE + - LOAD RS- RS+ VCC 2.7V TO 5.5V VSENSE + RS- VCC + - 2.7V TO 5.5V + - IOUT 25:1 IOUT IN POUT 0 TO 1V 1.21V REFERENCE INHIBIT POUT + - REF CIN1+ 1.
PAGE 20
MAX4210/MAX4211 High-Side Power and Current Monitors The common-mode voltage range is +4V to +28V and independent of the supply voltage. With this feature, the device can monitor the output current of a high-voltage source while running at a lower system voltage typically between 2.7V and 5.5V. The MAX4211 has a current-sense amplifier output.
PAGE 21
High-Side Power and Current Monitors Typical Operating Circuit + 4V TO 28V VSENSE - RSENSE + - LOAD RS+ RS- VCC 2.7V TO 5.5V + - C1 IOUT 25:1 POUT RP 1.21V REFERENCE R7 REF VPULLUP INHIBIT CIN1+ R3 R1 COUT1 CIN1- VPULLUP LE CIN2+ R6 R2 R4 COUT2 CIN2MAX4211A MAX4211B MAX4211C GND R5 ______________________________________________________________________________________ 21 MAX4210/MAX4211 the comparators’ inputs. This is the comparison reference voltage.
PAGE 22
MAX4210/MAX4211 High-Side Power and Current Monitors Applications Information Recommended Component Values Ideally, the maximum load current develops the fullscale sense voltage across the current-sense resistor. Choose the gain version needed to yield the maximum current-sense amplifier output voltage without saturating it. The typical high-side saturation voltage is about VCC - 0.25V.
PAGE 23
High-Side Power and Current Monitors 4V TO 28V VSENSE MAX4210/MAX4211 + - RSENSE + - LOAD RS+ RS- VCC 2.7V TO 5.5V + - IOUT 25:1 POUT 1.21V REFERENCE REF VPULLUP R1 INHIBIT CIN1+ COUT1 CIN1- R2 LE CIN2+ OVER/ UNDERPOWER R4 COUT2 CIN2MAX4211A MAX4211B MAX4211C GND R5 Figure 1.
PAGE 24
MAX4210/MAX4211 High-Side Power and Current Monitors VSENSE + 4V TO 28V - M1 RSENSE + - LOAD R5 RS+ RS- VCC 2.7V TO 5.5V + - C1 IOUT 25:1 POUT R3 1.21V REFERENCE R4 INHIBIT REF R1 CIN1+ COUT1 CIN1- R2 LE CIN2+ COUT2 MANUAL RESET CIN2MAX4211A MAX4211B MAX4211C RESET (FROM µC) GND Figure 2.
PAGE 25
High-Side Power and Current Monitors MAX4210/MAX4211 VCC MAX4210D/E/F RS+ POUT R2 OUTPUT RSIN VOUTPUT = VINPUT ✕ (R2/R1) ✕ AVPOUT ✕ VIN INPUT VIN GAIN CONTROL (0 TO 1V) R1 Figure 3. Single-Ended-Input, Variable-Gain Amplifier VSENSE + 4V TO 28V - RSENSE + RS+ RS- LOAD VCC 2.7V TO 5.5V + MAX4210D/E/F MAX4211D/E/F POUT IN GND Figure 4.
PAGE 26
POWER GAIN (1/V) CURRENT/ POWER MEASUREMENT OUTPUT NO. OF COMPARATORS INTERNAL REFERENCE VOLTAGEMULTIPLIER INPUT (INTERNAL RESISTOR-DIVIDER/ EXTERNAL INPUT) FULL-SCALE VSENSE VOLTAGE (mV) Selector Guide CURRENT GAIN (V/V) MAX4210/MAX4211 High-Side Power and Current Monitors MAX4210AETT 6 TDFN — 0.667 P None N INT 150 MAX4210AEUA 8 µMAX — 0.667 P None N INT 150 MAX4210BETT 6 TDFN — 1.000 P None N INT 150 MAX4210BEUA 8 µMAX — 1.
PAGE 27
High-Side Power and Current Monitors PART TEMP RANGE PIN-PACKAGE 6 TDFN-6-EP* (3mm x 3mm) MAX4210BETT -40°C to +85°C MAX4210BEUA -40°C to +85°C 8 µMAX MAX4210CETT -40°C to +85°C MAX4210CEUA -40°C to +85°C 8 µMAX MAX4210DETT -40°C to +85°C MAX4210DEUA -40°C to +85°C 8 µMAX MAX4210EETT -40°C to +85°C MAX4210EEUA -40°C to +85°C 8 µMAX MAX4210FETT -40°C to +85°C MAX4210FEUA -40°C to +85°C 8 µMAX MAX4211AETE -40°C to +85°C MAX4211AEUE -40°C to +85°C 16 TSSOP MAX4211BETE -40°C to +85°
PAGE 28
High-Side Power and Current Monitors MAX4210/MAX4211 Pin Configurations POUT RS- RS+ TOP VIEW 6 5 4 MAX4210 1 1 8 2 7 RS- N.C. 3 6 N.C. VCC 4 5 RS+ VCC (IN) N.C. MAX4210 POUT µMAX 3 2 GND GND (IN) N.C. REF CIN1- CIN1+ CIN2- 3mm x 3mm TDFN 12 11 10 9 POUT 13 8 CIN2+ IOUT 14 7 GND MAX4211 RS- 15 1 2 3 4 VCC (IN) N.C. LE COUT1 RS+ 16 6 COUT2 5 INHIBIT RS- 1 16 IOUT RS+ 2 15 POUT VCC 3 14 REF (IN) N.C.
PAGE 29
High-Side Power and Current Monitors 6, 8, &10L, DFN THIN.EPS D2 D A2 PIN 1 ID N 0.35x0.35 b PIN 1 INDEX AREA E [(N/2)-1] x e REF. E2 DETAIL A e k A1 CL A CL L L e e PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm -DRAWING NOT TO SCALE- 21-0137 G 1 2 COMMON DIMENSIONS MIN. MAX. D 0.70 2.90 0.80 3.10 E A1 2.90 0.00 3.10 0.05 L k 0.20 0.40 0.25 MIN. A2 0.20 REF. SYMBOL A PACKAGE VARIATIONS PKG.
PAGE 30
Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 24L QFN THIN.EPS MAX4210/MAX4211 High-Side Power and Current Monitors PACKAGE OUTLINE, 12, 16, 20, 24, 28L THIN QFN, 4x4x0.8mm 21-0139 D 1 2 PACKAGE OUTLINE, 12, 16, 20, 24, 28L THIN QFN, 4x4x0.
PAGE 31
High-Side Power and Current Monitors 8 INCHES DIM A A1 A2 b E fl 0.50–0.1 H c D e E H 0.6–0.1 L 1 1 α 0.6–0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.010 0.014 0.005 0.007 0.116 0.120 0.0256 BSC 0.116 0.120 0.188 0.198 0.016 0.026 6 0 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0 6 0.
PAGE 32
Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) TSSOP4.40mm.EPS MAX4210/MAX4211 High-Side Power and Current Monitors Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.