MP8100DS-Z [MPS]
Power Supply Support Circuit, Adjustable, 1 Channel, PDSO8, MS-012AA, SOIC-8;
| 型号： | MP8100DS-Z |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Power Supply Support Circuit, Adjustable, 1 Channel, PDSO8, MS-012AA, SOIC-8 光电二极管 |
| 文件： | 总5页 (文件大小：159K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TM
MP8100
Precision High-Side
Current-Sense Amplifier
TM
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP8100 is a low-cost, precision, high-side
current-sense amplifier. This device operates
from a single 2.5V to 18V supply and typically
consumes 12µA. It is ideal for today’s notebook
computers, cell phones and other systems
where battery/DC current monitoring is critical.
•
•
•
•
•
•
•
•
•
Low-Cost, Compact Current-Sense Solution
12µA Typical Supply Current
2.5V to 18V Operating Supply Voltage
1.5V to 18V Input Common Mode Range
3µA Typical Shutdown Current
250µV Input Offset Voltage
High Current Sensing Capability
Low 100mΩ Output Impedance (Optional)
Available in an 8-Pin SOIC Package
High-side current monitoring is especially useful
in battery-powered systems since it does not
interfere with the ground path of the battery
charger. The input common-mode range of
1.5V to 18V is independent of the supply
voltage and ensures that the current-sense
feedback remains viable even when connected
to a 2-cell battery pack in deep discharge.
APPLICATIONS
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•
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Portable PCs
PDA’s
Smart Battery Packs
Cell Phones
Portable Test/Measurement Systems
Battery-Operated Systems
Energy Management Systems
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V
IN
+
LOAD
--
3
7
1
4
6
RG1
VCC
RG2
MP8100
8
5
SHDN
OUT2
GND
OUT1
+
--
C
R
OUT2
100pF
OUT2
Opt.
SHUTDOWN
VOLTAGE
C
OUT1
Opt.
MP8100 Rev. 0.92
9/21/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
1
TM
MP8100 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
VCC, RG1, RG2 to GND .............–0.3V to +20V
Maximum Differential Input Voltage, RG1 to
RG2 ............................................................... 5V
Storage Temperature .............–65°C to +150°C
TOP VIEW
SHDN
NC
1
2
3
4
8
7
6
5
OUT2
Recommended Operating Conditions (2)
VCC, RG1, RG2 to GND ................... 2.5V to 18V
Operating Temperature .............–40°C to +85°C
VCC
RG2
RG1
GND
Thermal Resistance (3)
θJA
θJC
OUT1
SOIC8.....................................90...... 42... °C/W
Continuous Power Dissipation
(TA=70°C) ...............................................800mW
Part Number*
Package
Temperature
Notes:
MP8100DS
SOIC8
–40°C to +85°C
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
For Tape & Reel, add suffix –Z (eg. MP8100DS–Z)
For RoHS Compliant Packaging, add suffix –LF
(eg. MP8100DS–LF–Z)
*
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
VCC = 10V, VSHDN = 0V, TA = +25°C, unless otherwise noted.
Parameter
Symbol
VCC
Conditions
Min
Typ
Max
18
Units
Supply Voltage
2.5
V
Supply Current
ICC
ILOAD = 0A; VCC = 18V
12
0.25
0.25
4
30
µA
mV
mV
nA
%
OUT1 Input Offset Voltage
OUT2 Input Offset Voltage
Input Bias Current (4)
OUT1 Current Accuracy
No-Load OUT1 Error
Low-Level OUT1 Error
No-Load OUT2 Error
Low-Level OUT2 Error
VOS1
1.20
1.20
VOS2
IRG1, IRG2
IRG1/IOUT1
VSENSE = 100mV
VSENSE = 0V
±2
1
µA
µA
µA
µA
VSENSE = 5mV
VSENSE = 0V
2
1
VSENSE = 5mV
2
Power Supply Rejection
Ratio
2.5V < VCC < 18V,
VSENSE = 100mV
PSRR
0.05
%/V
Shutdown Supply Current
SHDN Threshold Voltage
SHDN Hysteresis
ICC(SHDN)
VSHDN = 3V, VCC = 18V
3
5
µA
V
VTH_SHUTDOWN
0.7
1.0
1.8
0.03
V
OUT1 Output Voltage
Range
VOUT1
VOUT2
VCC – 0.15
VCC – 1
V
V
OUT2 Output Voltage
Range
MP8100 Rev. 0.92
9/21/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
2
TM
MP8100 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER
ELECTRICAL CHARACTERISTICS (continued)
VCC = 10V, VSHDN = 0V, TA = +25°C, unless otherwise noted.
Parameter
Symbol
Conditions
Min
Typ
Max Units
VSENSE = 40mV,
tR
17
µs
R
R
OUT1 = 20kΩ,
OUT2 = 100kΩ,
OUT1 Rise, Fall Time (4)
RG1 = RG2 = 2kΩ,
COUT1 = 100pF,
tF
tR
tF
29
18
26
C
OUT2 = 100pF, 10% to 90%
VSENSE = 40mV,
µs
ROUT1 = 20kΩ,
OUT2 = 100kΩ,
R
OUT2 Rise, Fall Time (4)
RG1 = RG2 = 2kΩ,
COUT1 = 100pF,
C
OUT2 = 100pF, 10% to 90%
Maximum OUT1 Current (4)
Maximum OUT2 Current (4)
IOUT1
IOUT2
500
5
µA
mA
Notes:
4) Guaranteed by design.
5) Input common mode range cannot exceed the supply voltage.
PIN FUNCTIONS
Pin # Name Description
Shutdown. Connect to ground for normal operation. When high, supply current is less than
5µA.
1
SHDN
NC
2
3
4
5
6
7
8
Not Connected.
RG1 Gain Resistor. Connect to battery side of current-sense resistor through the gain resistor.
GND Ground or Battery Negative Terminal.
OUT1 Output For Driving Resistive Loads.
RG2 Gain Resistor. Connect to load side of current-sense resistor through the gain resistor.
VCC Power Input. Connect to Battery Input.
OUT2 Output For Driving Capacitive Loads.
MP8100 Rev. 0.92
9/21/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
3
TM
MP8100 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER
OPERATION
The MP8100 is a current-sense amplifier with a
wide operating input voltage range of 2.5V to
18V.
--
SHDN
NC
1
2
BIAS +
ENABLE
8
OUT2
BUFFER
+
VCC
RG2
7
6
RG1
GND
--
3
4
+
ERROR
AMPLIFIER
OUT1
5
Figure 1—Functional Block Diagram
APPLICATION INFORMATION
COMPONENT SELECTION
Table 1—Suggested Component Values
Full-Scale Load
Current, ISENSE (A)
Current Sense
Resistor (mΩ)
Gain Setting Resistor
ROUT1
(kΩ)
Gain
(kΩ) (RG1 = RG2)
0.1
1
500
50
10
5
2
2
2
2
20
20
20
20
10
10
10
10
5
10
The value of VOUT1 can be obtained with the equation:
IL × RS × ROUT1
VOUT
=
= IL × RS × Gain
RG1
Where RG1 is the sense resistor and IL is the load current.
MP8100 Rev. 0.92
9/21/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
4
TM
MP8100 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER
PACKAGE INFORMATION
SOIC8
0.189(4.80)
0.197(5.00)
0.050(1.27)
0.024(0.61)
0.063(1.60)
8
5
0.150(3.80)
0.157(4.00)
0.228(5.80)
0.244(6.20)
0.213(5.40)
PIN 1 ID
1
4
TOP VIEW
RECOMMENDED LAND PATTERN
0.053(1.35)
0.069(1.75)
SEATING PLANE
0.004(0.10)
0.010(0.25)
0.0075(0.19)
0.0098(0.25)
0.013(0.33)
0.020(0.51)
SEE DETAIL "A"
0.050(1.27)
BSC
SIDE VIEW
FRONT VIEW
0.010(0.25)
0.020(0.50)
x 45o
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
GAUGE PLANE
0.010(0.25) BSC
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
0.016(0.41)
0.050(1.27)
0o-8o
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
DETAIL "A"
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP8100 Rev. 0.92
9/21/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
5
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