MAX4070 Maxim, MAX4070 Datasheet

no-image

MAX4070

Manufacturer Part Number
MAX4070
Description
The MAX4069–MAX4072 low-cost, bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment
Manufacturer
Maxim
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX4070AUA
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX4069–MAX4072 low-cost, bidirectional, high-
side, current-sense amplifiers are ideal for monitoring
battery charge and discharge currents in notebooks,
cell phones, and other portable equipment. They fea-
ture up to 24V input common-mode voltage range, low
100µA supply current (which drops to only 10µA in
shutdown), and a total output error of less than 1.5%.
The wide 1.35V to 24V input common-mode range is
independent of the supply voltage, ensuring that the
current-sense feedback remains accurate even when
connected to a battery pack in deep discharge.
To achieve maximum flexibility, an external current-sense
resistor is used along with a Gain Select pin to choose
either 50V/V or 100V/V. A single output pin continuously
monitors the transition from charge to discharge and
avoids the need for a separate polarity output. The
MAX4070 contains an internal 2.5V reference. The
charging current is represented by an output voltage
from 2.5V to V
2.5V to GND. The MAX4071 is similar, but with a refer-
ence voltage of 1.5V. The MAX4069 has an adjustable
reference voltage, set by two external resistors. The
MAX4072 has an input for an external reference.
The MAX4069/MAX4071/MAX4072 operate from a 2.7V to
24V single supply. The MAX4070 operates from a 3.6V to
24V single supply. All devices are specified over the
automotive operating temperature range, -40°C to
+125°C. The MAX4070/MAX4071/MAX4072 are available
in 8-pin µMAX and 8-pin thin QFN packages. The
MAX4069 is available in a 10-pin µMAX
19-2423; Rev 3; 11/08
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations and Selector Guide appear at end of
data sheet.
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.
Notebook Fuel Gauging
Smart-Battery Packs/Chargers
Motor Control
Power-Management Systems
Cell-Phone Battery-Current Monitoring
CC
, while discharge current is given from
________________________________________________________________ Maxim Integrated Products
Bidirectional, High-Side, Current-Sense
General Description
Applications
®
package.
Amplifiers with Reference
♦ Bidirectional, Compact, Current-Sense Solution
♦ Total Output Error Less than 1.5%
♦ Selectable Gain of 50V/V or 100V/V
♦ Wide 1.35V to 24V Common-Mode Range
♦ 2.7V to 24V Single-Supply Operation
♦ Internal Precision Reference
♦ Low 100µA Supply Current
♦ 10µA Supply Current in Shutdown
♦ Available in Space-Saving Packages
* EP = Exposed pad.
MAX4069AUB
MAX4070AUA
MAX4070ATA
MAX4071AUA
MAX4071ATA
MAX4072AUA
MAX4072ATA
Independent of Supply Voltage
V
Adjustable (MAX4069)
2.50V (MAX4070)
1.50V (MAX4071)
8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)
8-Pin µMAX (MAX4070/MAX4071MAX4072)
10-Pin µMAX (MAX4069)
PART
BATT
V
CC
= 1.35V TO 24V
= 3.6V TO 24V
Typical Operating Circuit
-40°C to +125°C 10 µMAX
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 Thin QFN-EP*
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 Thin QFN-EP*
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 Thin QFN-EP*
TEMP RANGE
V
GSEL
SHDN
Ordering Information
CC
RS-
MAX4070
R
SENSE
GND
RS+
FROM BATTERY
PIN-PACKAGE
REFOUT
CHARGER
OUT
Features
LOAD
TO ADC
2.5V
MARK
TOP
ABN
ABO
ABP
1

Related parts for MAX4070

MAX4070 Summary of contents

Page 1

... The MAX4072 has an input for an external reference. The MAX4069/MAX4071/MAX4072 operate from a 2.7V to 24V single supply. The MAX4070 operates from a 3.6V to 24V single supply. All devices are specified over the automotive operating temperature range, -40°C to +125°C. The MAX4070/MAX4071/MAX4072 are available in 8-pin µ ...

Page 2

... Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300° 0V SHDN RS RS REFOUT = +25°C and CONDITIONS MAX4069/MAX4071/MAX4072 (Note MAX4070 T = +25° RS -40°C to +85° 12V RS- ...

Page 3

... MIN MAX4069/MAX4070 +25°C A MAX4072 -35mV 40° 85°C SENSE 12V MIN gain = 50 MAX4069/MAX4070 +25°C A MAX4072 -17.5mV 40° 85°C SENSE 12V gain = 100 A MIN T = +25°C MAX4071 -15mV, ...

Page 4

... V CC Gain = 50V 50mV, SENSE 12V 100pF Gain = 100V GSEL = GND A V GSEL = 2.7V to 24V CC PSRR (MAX4069/MAX4071/MAX4072 3.6V to 24V (MAX4070 3.6V or 24V 3.6V or 24V GSEL = V = 24V or GND GSEL CC SHDN = V = 24V CC I SHDN SHDN = GND 24V ...

Page 5

... SENSE unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL REFOUT (MAX4069/MAX4070/MAX4071) Reference Output Voltage Reference Output Voltage TCV Temperature Coefficient ΔV Load Regulation /ΔI ΔV Line Regulation REF Capacitive-Load Stability Reference Adjust Voltage Threshold Reference Output Voltage Range ...

Page 6

... A = 100V/V V -0.3 -0.4 -0 SUPPLY VOLTAGE (V) SUPPLY CURRENT vs. SUPPLY VOLTAGE 140 A = 100V/V V 130 MAX4071 120 110 MAX4070 100 MAX4069 90 MAX4072 SUPPLY VOLTAGE (V) 6 _______________________________________________________________________________________ Typical Operating Characteristics A INPUT OFFSET VOLTAGE vs. TEMPERATURE ...

Page 7

... T CC RS+ SENSE MAX4070 REFOUT vs. TEMPERATURE 2.540 2.525 2.510 2.495 2.480 2.465 2.450 -50 - 100 TEMPERATURE (°C) MAX4070 REFOUT vs. SUPPLY VOLTAGE 2.500 2.499 2.498 2.497 2.496 2.495 2.494 2.493 2.492 2.491 2.490 SUPPLY VOLTAGE ( ...

Page 8

Bidirectional, High-Side, Current-Sense Amplifiers with Reference ( 12V 50mV for gain of 100V/V and 75mV for gain of 50V/ RS+ SENSE SMALL-SIGNAL TRANSIENT RESPONSE MAX4069-72 toc19 GAIN = 50 INPUT 5mV/div OUTPUT 200mV/div ...

Page 9

... GND to the under-side exposed paddle. Adjustable Output Voltage Feedback Input. Connect a resistor-divider ADJ between REFOUT, ADJ, and GND (MAX4069 only, see Functional Diagram). REFOUT Reference Output Voltage (MAX4069/MAX4070/MAX4071) Voltage Output. The difference voltage, V OUT the voltage difference between RS+ and RS- and indicates the correct polarity ...

Page 10

... The MAX4069/MAX4071/MAX4072 operate from a 2.7V to 24V single supply. Because the MAX4070 has a 2.5V internal reference, it operates from 3.6V to 24V. All devices have a low 100µA supply current that reduces to only 10µ ...

Page 11

... V CC Reference Output (MAX4069/MAX4060/MAX4071) The REFOUT of the MAX4069/MAX4070/MAX4071 can sink 100µA and source 500µA. Keep the total capaci- tance on REFOUT under 500pF to maintain stability. Recommended Component Values Ideally, the maximum load current develops the full- scale sense voltage across the current-sense resistor ...

Page 12

... RS+ TRACE and RS prevent forwarding the back-to- SENSE back diodes between the differential input, the absolute maximum of the differential input voltage is 0.3V. Dynamic Range Considerations Although the MAX4069–MAX4072 have fully symmetri- cal, bidirectional, V input capability, the output- SENSE ...

Page 13

... Kelvin MAX4069 SENSE MAX4070 MAX4071 MAX4072 reasonably SENSE TRANSISTOR COUNT: 338 PROCESS: BiCMOS Pin Configurations 1 8 GSEL MAX4070 MAX4071 3 6 OUT MAX4072 4 5 REFOUT (REFIN) Thin QFN/μMAX Selector Guide SUPPLY COMMON- REFERENCE VOLTAGE MODE RANGE RANGE (V) ADJUSTABLE 2 ...

Page 14

... Bidirectional, High-Side, Current-Sense Amplifiers with Reference For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 8 TQFN-EP 8 µMAX 10 µMAX 14 ______________________________________________________________________________________ Package Information PACKAGE CODE T833-2 U8-1 U10-2 DOCUMENT NO. 21-0137 21-0036 21-0061 ...

Page 15

... Bidirectional, High-Side, Current-Sense For the latest package outline information and land patterns www.maxim-ic.com/packages. COMMON DIMENSIONS SYMBOL MIN. MAX. A 0.70 0.80 D 2.90 3.10 E 2.90 3.10 A1 0.00 0.05 L 0.20 0.40 k 0.25 MIN. A2 0.20 REF. ______________________________________________________________________________________ Amplifiers with Reference Package Information (continued) PACKAGE VARIATIONS PKG. CODE T633-2 6 1.50±0.10 2.30±0.10 ...

Page 16

... Bidirectional, High-Side, Current-Sense Amplifiers with Reference For the latest package outline information and land patterns www.maxim-ic.com/packages. 16 ______________________________________________________________________________________ Package Information (continued) α α ...

Page 17

... Bidirectional, High-Side, Current-Sense For the latest package outline information and land patterns www.maxim-ic.com/packages. ______________________________________________________________________________________ Amplifiers with Reference Package Information (continued) α α 17 ...

Page 18

... Added information for RG1 and RG2 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 18 © ...

Related keywords