MP8110DK-LF

MP8110 Precision High-Side Current-Sense Amplifier The Future of Analog IC Technology DESCRIPTION FEATURES The MP8110 is a low-cost, precision, high-side current-sense amplifier. This device operates from a single 2.5V to 40V 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. • • • • • • • • • 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 1.4V to 40V 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. Low-Cost, Compact Current-Sense Solution 12µA Typical Supply Current 2.5V to 40V Operating Supply Voltage 1.4V to 40V Input Common Mode Range 3µA Typical Shutdown Current 400µV Input Offset Voltage High Current Sensing Capability Integrated Buffer Amplifier Available in 8-Pin SOIC and MSOP packages, APPLICATIONS • • • • • • • This device is available in 8-pin SOIC and MSOP packages. 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 Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION VIN + 10uF ILOAD C5 0.1uF RG2 RG1 VCC SHUTDOWN ON OFF MP8110 SHDN OUT2 GND OUT1 CGS 100pF MP8110 Rev. 0.9 9/21/2007 COUT Opt. www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 1 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER PACKAGE REFERENCE TOP VIEW TOP VIEW SHDN 1 8 OUT2 VCC NC 2 7 VCC 6 RG2 RG1 3 6 RG2 5 OUT1 GND 4 5 OUT1 SHDN 1 8 OUT2 NC 2 7 RG1 3 GND 4 Part Number* Package Temperature Part Number* Package Temperature MP8110DS SOIC8 –40°C to +85°C MP8110DK MSOP8 –40°C to +85°C * * For Tape & Reel, add suffix –Z (eg. MP8110DS–Z) For RoHS Compliant Packaging, add suffix –LF (eg. MP8110DS–LF–Z) ABSOLUTE MAXIMUM RATINGS (1) VCC, RG1, RG2 to GND..............–0.3V to +42V Max Differential Input Voltage, RG1 to RG2..... 5V Max Junction Temperature (Tj) ................150°C Storage Temperature ............. –65°C to +150°C Recommended Operating Conditions (2) VCC, RG1, RG2 to GND ...................2.5V to 40V Operating Ambient Temperature–40°C to +85°C For Tape & Reel, add suffix –Z (eg. MP8110DK–Z) For RoHS Compliant Packaging, add suffix –LF (eg. MP8110DK–LF–Z) Thermal Resistance (3) θJA θJC SOIC8..................................... 90 ...... 42... °C/W MSOP8 .................................. 150 ..... 65... °C/W Continuous Power Dissipation (TA=70°C) ...............................................800mW Notes: 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its operating conditions. 3) Measured on approximately 1” square of 1 oz copper. ELECTRICAL CHARACTERISTICS VCC = 24V, VSHDN = 0V, TA = +25°C, unless otherwise noted. Parameter Symbol Supply Voltage VCC Supply Current ICC Common Mode Input Voltage VIN_CM Conditions Min Typ 2.5 ILOAD = 0A, VCC = 40V 12 VCC > VIN Low 1.4 VCC > VIN High 40 Max Units 40 V 30 µA V OUT1 Input Offset Voltage VOS1 0.4 2 mV OUT2 Input Offset Voltage VOS2 1 5 mV IRG1, IRG2 4 20 nA ±2 0.1 0.3 0.01 0.05 ±5 1 2 1 2 % µA µA µA µA Input Bias Current (4) OUT1 Current Accuracy No-Load OUT1 Error Low-Level OUT1 Error No-Load OUT2 Error Low-Level OUT2 Error IRG1/IGS Power Supply Rejection Ratio PSRR Shutdown Supply Current MP8110 Rev. 0.9 9/21/2007 ICC(SHDN) VSENSE = 100mV VSENSE = 0V VSENSE = 5mV VSENSE = 0V VSENSE = 5mV 2.5V < VCC < 40V, VSENSE = 100mV VSHDN = 3V 70 97 3 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. dB 6 µA 2 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER ELECTRICAL CHARACTERISTICS (continued) VCC = 24V, VSHDN = 0V, TA = +25°C, unless otherwise noted. Parameter Symbol SHDN Threshold Voltage Conditions Min Typ Max Units VTH_SHUTDOWN (Low - High) 0.7 0.9 1.2 V SHDN Hysteresis tR OUT1 Rise, Fall Time (4) tF tR OUT2 Rise, Fall Time (4) tF OUT1 Output Voltage Range OUT2 Output Voltage Range Maximum OUT1 Current (4) Maximum OUT2 Current (4) VSENSE = 40mV, RGS = 20kΩ, ROUT = 100kΩ, RG1 = RG2 = 2kΩ, CGS = 100pF, COUT = 100pF, 10% to 90% VSENSE = 40mV, RGS = 20kΩ, ROUT = 100kΩ, RG1 = RG2 = 2kΩ, CGS = 100pF, COUT = 100pF, 10% to 90% 30 mV 17 µs 29 18 µs 26 VGS VCC – 0.15 24 V VOUT VCC – 1 24 V IGS 500 µA IOUT2 5 mA Notes: 4) Guaranteed by design. 5) Input common mode range cannot exceed the supply voltage. PIN FUNCTIONS SOIC8 Name 1 SHDN 2 NC 3 RG1 4 5 GND OUT1 6 RG2 7 8 VCC OUT2 MP8110 Rev. 0.9 9/21/2007 Description Shutdown. Connect to ground for normal operation. When high, supply current is less than 3µA. Not Connected. Gain Resistor. Connect to battery side of current-sense resistor through the gain resistor. Ground or Battery Negative Terminal. Output for Driving Resistor Load. Gain Resistor. Connect to load side of current-sense resistor through the gain resistor. Power Input. Connect to Battery Input. Output For Driving Capacitive Loads. www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 3 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER OPERATION The MP8110 is a current-sense amplifier with a wide operating input voltage range of 2.5V to 40V.It has 1.4V to 40V Common-Mode range. This feature allows the monitoring of current flow out of a battery in deep discharge, and also enables high-side current sensing up to the supply voltage, VCC. Current flows through the sense resistor, RS, which generates a sense voltage VRS. The high precision sense amplifier built into the MP8110 monitors the differential voltage across RS and dynamically adjusts the gate voltage of the internal P-channel MOSFET to maintain a equal passing current as IRG1. The current amplifier gain is therefore set as: RGS / RG1. MP8110 Rev. 0.9 9/21/2007 Choosing Sensing Resistor Given the gain and maximum load current, select RS such that VRS does not exceed +0.25V and VOUT1 does not exceed 5V. To measure lower currents more accurately, use a high value for Rs. A higher value develops a higher sense voltage, which overcomes offset voltage errors of the internal current amplifier. In applications of monitoring very high current, ensure RS is able to dissipate its own I2R losses. If the resistor rating power is exceeded, its value may drift or it may fail altogether, causing a differential voltage across the terminals in excess of the absolute maximum range (0.25V). www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 4 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER SHDN -- BIAS + ENABLE OUT2 BUFFER + VCC NC ILOAD GND RG1 RS IRG1 RG1 -- VRS RG2 + RG2 SENSE AMPLIFIER OUT1 IRGS VOUT1 RGS To Load Figure 1—Functional Block Diagram APPLICATION INFORMATION COMPONENT SELECTION Table 1—Suggested Component Values (refer to Typical Circuit on page 1) Full-Scale Load Current, ISENSE (A) Current Sense Resistor (mΩ) Gain Setting Resistor (kΩ) (RG1 = RG2) RGS (kΩ) Gain 0.1 1 5 10 500 50 10 5 2 2 2 2 20 20 20 20 10 10 10 10 The value of VOUT1 can be obtained with the equation: VOUT 1 = ILOAD × R S × R GS = ILOAD × R S × Gain R G1 Where RG1 is the sense resistor and ILOAD is the load current. MP8110 Rev. 0.9 9/21/2007 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 5 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER TYPICAL PERFORMANCE CHARACTERISTICS VIN =24V, RG1=RG2=2KΩ, RG3 =20KΩ, RS =20mΩ, CGS =100pF, C5 =0.1µF, TA = +25ºC, unless otherwise noted. VOUT1 vs. Load Current 600 400 200 30 -0.3 25 -0.2 20 VOUT2 15 10 VOUT1 5 0 1 3 4 2 LOAD CURRENT(A) 0 5 Shut Down Current vs. Input Voltage 10 ERROR (%) 800 VOUT1 (mV) OUTPUT VOLTAGE (mV) 1000 0 VOUT1 Error vs. Input Voltage Output Error vs. Load Current 30 0 1 2 3 4 5 6 LOAD CURRENT(A) -0.1 0 0.1 0.2 0.3 7 Supply Current vs. Input Voltage 0 8 16 24 32 INPUT VOLTAGE (V) 40 VOUT1 vs. Temperature 1200 6 4 2 OUTPUT VOLTAGE (mV) SUPPLY CURRENT (uA) SHND CURRENT (uA) 5.0A 8 24 18 12 6 1000 800 600 2.0A 400 200 0.1A 2 10 18 26 34 INPUT VOLTAGE (V) 0 42 2 PSRR vs. Frequency 40 VOUT1_OFFSET (mV) PSRR (dB) 60 20 0 0.001 MP8110 Rev. 0.9 9/21/2007 -45 0.1 10 1000 100000 10000000 FREQUENCY (Hz) 85 25 0.8 0.6 0.4 0.2 0 -40 -15 10 35 60 TEMPERATURE ( C) Supply Current vs. Temperature 1.0 120 80 42 VOUT1 Offset vs. Temperature 140 100 10 18 26 34 INPUT VOLTAGE (V) 0 SUPPLY CURRENT (mA) 0 -15 10 35 60 TEMPERATURE ( C) 85 20 15 10 5 0 -40 -15 10 35 60 TEMPERATURE ( C) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 85 6 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN =24V, RG1 =RG2 =2KΩ, RG3 =20KΩ, RS =20mΩ, CGS =100pF, C5 =0.1µF, TA = +25ºC, unless otherwise noted. SHND High to Low SHDN Low to High Transient Response ILOAD=2A ILOAD=2A VIN=24V, ILOAD: 0A to 2A VSHND 2V/div. VSHND 2V/div. VOUT1 0.5V/div. VOUT1 0.2V/div. VOUT1 0.2V/div. ILOAD 2A/div. VOUT2 0.5V/div. ILOAD 2A/div. 20us/div. ILOAD 2A/div. 20us/div. 100us/div. Transient Response VIN=40V, ILOAD: 1A to 3A VOUT1 0.5V/div. VOUT2 0.5V/div. ILOAD 2A/div. 100us/div. MP8110 Rev. 0.9 9/21/2007 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 7 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER TYPICAL APPLICATION VIN + OUPUT C2 10uF C4 200pF C3 1uF OUPUT1 C1 0.1uF RG1 RG2 -- MP8110 VCC OUT2 SHDN MP8103 + -+ MP8103 OUPUT2 OUT1 GND C5 100nF GND Q1 R12 10kΩ Figure 2—Current Control Oscillator MP8110 Rev. 0.9 9/21/2007 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 8 MP8110 – 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) 8 5 0.063(1.60) 0.150(3.80) 0.157(4.00) PIN 1 ID 1 0.228(5.80) 0.244(6.20) 0.213(5.40) 4 TOP VIEW RECOMMENDED LAND PATTERN 0.053(1.35) 0.069(1.75) SEATING PLANE 0.004(0.10) 0.010(0.25) 0.013(0.33) 0.020(0.51) 0.0075(0.19) 0.0098(0.25) SEE DETAIL "A" 0.050(1.27) BSC SIDE VIEW FRONT VIEW 0.010(0.25) x 45o 0.020(0.50) GAUGE PLANE 0.010(0.25) BSC 0o-8o 0.016(0.41) 0.050(1.27) DETAIL "A" MP8110 Rev. 0.9 9/21/2007 NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 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. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA. 6) DRAWING IS NOT TO SCALE. www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 9 MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER MSOP8 0.114(2.90) 0.122(3.10) 5 8 0.114(2.90) 0.122(3.10) PIN 1 ID (NOTE 5) 0.010(0.25) 0.014(0.35) 0.187(4.75) 0.199(5.05) 4 1 0.0256(0.65)BSC BOTTOM VIEW TOP VIEW GAUGE PLANE 0.010(0.25) 0.030(0.75) 0.037(0.95) 0.043(1.10)MAX SEATING PLANE 0.002(0.05) 0.006(0.15) FRONT VIEW 0o-6o 0.016(0.40) 0.026(0.65) 0.004(0.10) 0.008(0.20) SIDE VIEW NOTE: 0.181(4.60) 0.040(1.00) 0.016(0.40) 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) PIN 1 IDENTIFICATION HAS HALF OR FULL CIRCLE OPTION. 6) DRAWING MEETS JEDEC MO-187, VARIATION AA. 7) DRAWING IS NOT TO SCALE. 0.0256(0.65)BSC RECOMMENDED LAND PATTERN 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. MP8110 Rev. 0.9 9/21/2007 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 10