MP2144GJ-Z

MP2144 2A, 5.5V, 1.2MHz, 40μA IQ, COT Synchronous Step Down Switcher The Future of Analog IC Technology DESCRIPTION FEATURES The MP2144 is a monolithic, step-down, switchmode converter with internal power MOSFETs. It can achieve up to 2A continuous output current from a 2.5V–to-5.5V input voltage with excellent load and line regulation. The output voltage can be regulated to as low as 0.6V. • • • • • • The constant-on-time control scheme provides fast transient response and eases loop stabilization. Fault condition protections include cycle-by-cycle current limiting and thermal shutdown. The MP2144 is available in small TSOT23-8 package and requires only a minimal number of readily available standard external components. The MP2144 is ideal for a wide range of applications including high-performance DSPs, FPGAs, smartphones, portable instruments, and DVD drivers. • • • • • • • Wide 2.5V-to-5.5V Operating Input Range Output Voltage as Low as 0.6V 100% Duty Cycle in Dropout Up to 2A Output Current Low IQ: 40µA 90mΩ and 60mΩ Internal Power MOSFET Switches Default 1.2MHz Switching Frequency EN and Power-Good for Power Sequencing Cycle-by-Cycle Over-Current Protection Auto Discharge at Power-Off Short-Circuit Protect with Hiccup Mode Stable with Low-ESR Output Ceramic Capacitors Available in a TSOT23-8 Package APPLICATIONS • • • Low Voltage I/O System Power Handheld/Battery-powered Systems Wireless/Networking Cards All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION VIN 2.5V to 5.5V 2 SW VIN C1 10 F OUT 3 PG 8 1 EN GND 4,6 100 90 80 R1 200 FB PG VOUT 1.2V/2A 5 MP2144 EN L1 1 7 C2 10 70 60 50 40 R2 200k 30 20 10 0 0.001 MP2144 Rev. 1.03 12/20/2012 0.01 0.1 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 1 10 1 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER ORDERING INFORMATION Part Number* MP2144GJ Package TSOT23-8 Top Marking ADL * For Tape & Reel, add suffix –Z (e.g. MP2144GJ–Z); PACKAGE REFERENCE TOP VIEW PG 1 8 EN VIN 2 7 FB SW 3 6 AGND PGND 4 5 OUT SOT23-8 ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance Supply Voltage VIN ......................................... 6V VSW ........................ (-3V for < 5ns) to (VIN+0.3V) All Other Pins .................................-0.3V to +6 V Junction Temperature ...............................150°C Lead Temperature ....................................260°C (2) Continuous Power Dissipation (TA = 25°C) ……….….. ............................................... 1.25W Storage Temperature............... -65°C to +150°C TSOT23-8.............................. 100 ..... 55... °C/W Recommended Operating Conditions (3) Supply Voltage VIN ..........................2.5V to 5.5V Output Voltage VOUT ................. 0.6V to VIN -0.5V Operating Junction Temp. (TJ). -40°C to +125°C MP2144 Rev. 1.03 12/20/2012 (4) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 2 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER ELECTRICAL CHARACTERISTICS (5) VIN = 5V, TA = 25°C, unless otherwise noted. Parameter Symbol Feedback Voltage VFB Feedback Current PFET Switch ON Resistance NFET Switch ON Resistance IFB Condition 2.5V ≤ VIN ≤ 5.5V o o TA=-40 C to +85 C Min Typ Max -1.5% 0.600 +1.5% -2% VFB = 0.63V 10 90 60 RDSON_P RDSON_N VEN = 0V, VIN = 5V VSW = 0V and 5V Switch Leakage PFET Current Limit NFET Switch Sinking Current INSW ON Time tON Switching frequency Minimum OFF Time Soft-Start Time Soft-Stop Time Power-Good Upper Trip Threshold Power-Good Lower Trip Threshold Power-Good Delay Power-Good Sink Current Capability Power Good Logic High Voltage Power Good Internal Pull-Up Resistor Under-Voltage Lockout Threshold Rising Under-Voltage Lockout Threshold Hysteresis EN Input Logic Low Voltage EN Input Logic High Voltage EN Input Current Supply Current (Shutdown) Supply Current (Quiescent) Thermal Shutdown Thermal Hysteresis 0.1 3.3 fs VOUT=1.2V, VFB=0.7V VIN=5V, VOUT=1.2V VIN=3.6V, VOUT=1.2V VIN=5V, VOUT=1.2V, IOUT=1A TA=-40oC to +85oC +2% -20% -25% tMIN-OFF tSS-ON tSS-OFF FB voltage with respect to the regulation 3.8 100 200 277 1200 1200 50 1.3 1 Units V/% nA mΩ mΩ 2 μA A μA nS +20% +25% kHz kHz ns ms ms +10% % PGL -10% % PGD 110 μs PGH VPG-L Sink 1mA VPG-H VIN=5V, VFB=0.6V 0.4 4.9 V 500 RPG 2.0 2.2 kΩ 2.4 150 V mV 0.4 2 0.1 0.1 V V μA μA μA 40 μA 150 30 °C °C 1.2 VEN=2V VEN=0V VEN=0V VEN=2V, VFB=0.63V, VIN=3.6V V Notes: 5) Guaranteed by design. MP2144 Rev. 1.03 12/20/2012 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 3 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER TYPICAL PERFORMANCE CHARACTERISTICS VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted. Quiescent Current vs. Input Voltage Shutdown Current vs. Input Voltage 100 Load Regulation 0.003 0.0025 80 ERROR 0.002 60 0.0015 40 0.001 20 0 0.0005 2 2.5 3 3.5 4 4.5 5 5.5 6 0 2 2.5 3 3.5 4 4.5 5 5.5 6 0 0.5 1 1.5 2 LOAD CURRENT (A) Line Regulation Efficiency vs.IOUT 100 80 90 70 80 ERROR 60 70 50 60 40 50 30 40 30 20 20 10 2.0 3.0 4.0 5.0 6.0 0 10 0 0.5 1 1.5 OUTPUT CURRENT (A) 110 100 90 80 70 60 50 40 30 20 10 0 0.001 MP2144 Rev. 1.03 12/20/2012 0.01 0.1 IOUT(A) 1 VOUT=1.2V 2 0 0.001 0.01 0.1 IOUT(A) 1 10 10 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 4 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted Output Ripple Output Ripple IOUT=0A Vout 50.0mV/div. Vsw 2.00V/div. IL 1.00A/div. Vout 10.0mV/div. Vsw 2.00V/div. Vsw 2.00V/div. IL 1.00A/div. IL 2.00A/div. VIN = 6V, VOUT = 0.6V, IOUT=2A Vout 100mV/div. Vout 20.0mV/div. Vsw 5.00V/div. Vsw 5.00V/div. Vout 500mV/div. Vin 5.00V/div. Vsw 5.00V/div. IL 2.00A/div. IL 2.00A/div. IL 2.00A/div. VIN Power Up with 2A Load VIN Shut Down without Load Vout 500mV/div. Vin 2.00V/div. Vsw 5.00V/div. Vsw 2.00V/div. IL 2.00A/div. IL 2.00A/div. MP2144 Rev. 1.03 12/20/2012 VIN Power Up without Load Output Ripple VIN = 6V, VOUT = 0.6V, IOUT=0A Vin 5.00V/div. IOUT=2A Vout 10.0mV/div. Output Ripple Vout 500mV/div. Output Ripple IOUT=1A VIN Shut Down with 2A Load Vout 500mV/div. Vin 2.00V/div. Vsw 2.00V/div. IL 2.00A/div. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 5 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER .TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted. EN Start Up without Load EN Start Up with 2A Load VOUT 500mV/div. VOUT 500mV/div. VEN 2.00V/div. VSW 5.00V/div. VEN 2.00V/div. VSW 5.00V/div. IL 2.00A/div. IL 2.00A/div. EN Shut Down with 2A Load EN Shut Down without Load VOUT 500mV/div. VEN 2.00V/div. VSW 5.00V/div. IL 1.00A/div. Power Good On without Load Power Good On with 2A Load VOUT 1.00V/div. VOUT 500mV/div. VPG 5.00V/div. VSW 5.00V/div. VEN 2.00V/div. VSW 2.00V/div. IL 1.00A/div. IL 2.00A/div. VOUT 500mV/div. VPG 5.00V/div. VSW 5.00V/div. IL 2.00A/div. Power Good Off without Load VOUT 1.00V/div. VPG 5.00V/div. VSW 5.00V/div. IL 1.00A/div. MP2144 Rev. 1.03 12/20/2012 VOUT 500mV/div. VPG 5.00V/div. VSW 5.00V/div. IL 2.00A/div. Power Good Off with 2A Load Load Transient Response VOUT 20.0mV/div. VSW 5.00V/div. IL 2.00A/div. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 6 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted. Short Circuit Entry Short Circuit Short Circuit Recovery VIN= 6V VIN= 6V VIN= 6V VOUT 1.00V/div. VSW 5.00V/div. IL 5.00A/div. MP2144 Rev. 1.03 12/20/2012 VOUT 1.00V/div. VSW 5.00V/div. IL 5.00A/div. VOUT 1.00V/div. VSW 5.00V/div. IL 5.00A/div. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 7 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER PIN FUNCTION TSOT23 Pin # Name 1 PG 2 VIN 3 4 5 6 SW PGND OUT AGND 7 FB 8 EN MP2144 Rev. 1.03 12/20/2012 Description Power Good Indicator. The output of this pin is an open drain with an internal pull up resistor to IN. PG is pulled up to VIN when the FB voltage is within 10% of the regulation level. If the FB voltage is out of that regulation range, it is LOW. Supply Voltage. The MP2144 operates from a +2.5V-to-+5.5V unregulated input. C1 prevents large voltage spikes from appearing at the input. Switch Output Power Ground Input Sense. For output voltage sense. Analog Ground. Internal control circuit reference. Feedback. Connect an external resistor divider from the output to GND to set the output voltage. On/Off Control www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 8 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER FUNCTIONAL BLOCK DIAGRAM VIN Bias & Voltage Reference EN Soft start /off + COMP VTH Lo-Iq 0.6V RST + + E.A. - Constant On-Time Pulse Main Switch (PCH) PDRV PWM PWM + Lo-Iq + FB SW EN FBCOMP Driver VOUT Lo-Iq Ramp generator Synchronous Rectifier (NCH) SW Lo-Iq Hi-Z NDRV OUT PGND IN FB for fixed output 0.66V + + COMP COMP - Lo-Iq + AGND COMP 0.54V PG - Figure 1: Functional Block Diagram MP2144 Rev. 1.03 12/20/2012 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 9 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER OPERATION The MP2144 uses constant on-time control with input voltage feed-forward to stabilize the switching frequency over its full input range. At light load, the MP2144 employs proprietary control over the low-side MOSFET (LS-FET) and inductor current to eliminate ringing on switching node and improve efficiency. Constant-On–Time Control When compared to fixed-frequency PWM control, constant-on–time control offers advantages including simpler control loop and faster transient response. By using input voltage feed-forward, the MP2144 maintains a nearly constant switching frequency across the entire input and output voltage range. The on-time of the switching pulse can be estimated as: t ON = VOUT ⋅ 0.833μs VIN To prevent inductor current runaway during the load transient, the MP2144 has a fixed minimum off time of 50ns. However, this minimum off time limit does not affect the operation of the MP2144 in steady state in any way. Light-Load Operation Under light-load conditions, the MP2144 uses a proprietary control scheme to save power and improve efficiency: it gradually ramps down the LS-FET current to its minimum instead of turning off the LS-FET immediately when the inductor current starts to reverse. The gradual current drop avoids ringing at the switching node that always occurs in discontinuous conduction mode (DCM) operation. Enable When the input voltage exceeds the undervoltage lockout (UVLO) threshold—typically 2.2V—the MP2144 can be enabled by pulling the EN pin higher than 1.2V. Leaving EN pin MP2144 Rev. 1.03 12/20/2012 floating or grounded will disable the MP2144. There is an internal 1MΩ resistor from the EN pin to ground. Soft-Start/Stop MP2144 has a built-in soft-start that ramps up the output voltage at a constant slew rate that avoids overshooting at startup. The soft-start time is typically about 1ms. When disabled, the MP2144 ramps down the internal reference voltage to allow the load to linearly discharge the output. Power GOOD Indictor MP2144 has an open drain with a 500kΩ pullup resistor pin for power good (PG) indication. When the FB pin is within ±10% of the regulatory voltage (0.6V), the PG pin is pulled up to VIN by the internal resistor. If the FB pin voltage is outside the ±10% window, the PG pin is pulled to ground by an internal MOSFET. The MOSFET has a maximum Rdson of less than 100Ω. Current limit The MP2144 has a 3.3A minimum current limit for the high side switch (HS-FET). When the HS-FET hits its current limit, MP2144 enters hiccup mode until the current drops to prevent the inductor current from rising and possibly damaging the components. Short Circuit and Recovery The MP2144 also enters short-circuit protection (SCP) mode when it hits the current limit, and tries to recover from the short circuit by entering hiccup mode. In SCP, the MP2144 disables the output power stage, discharges a soft-start capacitor, and then enacts a soft-start procedure. If the short-circuit condition still holds after soft-start ends, the MP2144 repeats this operation until the short circuit ceases and output rises back to regulation level. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 10 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER APPLICATION INFORMATION COMPONENT SELECTION Setting the Output Voltage L1 = The external resistor divider sets the output voltage (see the Typical Application schematic on page 1). The design of the feedback resistor R1 must account for both stability and dynamic response, and thus can not be too large or too small. Choose an R1 value between 120kΩ and 200kΩ. R2 is then given by: R2 = R1 Vout −1 0.6 VOUT R1 FB R2 Figure 2: Feedback Network Table 1 lists the recommended resistors values for common output voltages. Table 1: Resistor Values for Common Output Voltages R1 (kΩ) R2 (kΩ) VOUT (V) 1.0 200(1%) 300(1%) 1.2 200(1%) 200(1%) 1.8 200(1%) 100(1%) 2.5 200(1%) 63.2(1%) 3.3 200(1%) 44.2(1%) Selecting the Inductor A 0.82µH to 4.7µH inductor is recommended for most applications. For the best efficiency, chose an inductor with a DC resistance less than 15mΩ. For most designs, the inductance value can be derived from the following equation. MP2144 Rev. 1.03 12/20/2012 Where ΔIL is the inductor ripple current. Choose an inductor current to be approximately 30% of the maximum load current. The maximum inductor peak current is: IL(MAX) = ILOAD + ΔIL 2 Selecting the Input Capacitor The feedback circuit is shown in Figure 2. MP2144 VOUT × (VIN − VOUT ) VIN × ΔIL × fOSC The input current to the step-down converter is discontinuous, and requires a capacitor to supply the AC current to the step-down converter while maintaining the DC input voltage. Use low-ESR capacitors for the best performance. Ceramic capacitors with X5R or X7R dielectrics are highly recommended because of their low ESR values and small temperature coefficients. For most applications, a 10µF capacitor is sufficient. For higher output voltage, 47uF may be needed to increase system stability. Since the input capacitor absorbs the input switching current it requires an adequate ripple current rating. The RMS current in the input capacitor can be estimated by: I C1 = ILOAD × VOUT ⎛⎜ VOUT × 1− VIN ⎜⎝ VIN ⎞ ⎟ ⎟ ⎠ The worse case condition occurs at VIN = 2VOUT, where: IC1 = ILOAD 2 For simplification, choose an input capacitor whose RMS current rating is greater than half of the maximum load current. The input capacitor can be electrolytic, tantalum, or ceramic. When using electrolytic or tantalum capacitors, use a small, high-quality, ceramic capacitor (0.1μF) placed as close to the IC as possible. When using ceramic capacitors, make sure that they have enough capacitance to prevent excessive voltage ripple at the input. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 11 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER The input voltage ripple caused by capacitance can be estimated by: ΔVIN = ⎛ ILOAD V V ⎞ × OUT × ⎜ 1 − OUT ⎟ fS × C1 VIN ⎝ VIN ⎠ ΔVOUT = VOUT ⎛ V × ⎜ 1 − OUT fS × L1 ⎝ VIN ⎞ ⎟ × RESR ⎠ The characteristics of the output capacitor also affect the stability of the regulation system. Selecting the Output Capacitor PCB Layout Recommendation The output capacitor (C2) maintains the output DC voltage. Use Ceramic capacitors. Low ESR capacitors keep the output voltage ripple low. The output voltage ripple can be estimated by: Proper layout of the switching power supplies is very important, and sometimes critical for proper function. For the high-frequency switching converter, poor layout design can result in poor line or load regulation and stability issues. ΔVOUT = ⎞ VOUT ⎛ VOUT ⎞ ⎛ 1 × ⎜1 − ⎟ ⎟ × ⎜ RESR + fS × L1 ⎝ VIN ⎠ ⎝ 8 × fS × C2 ⎠ Where L1 is the inductor value and RESR is the equivalent series resistance (ESR) value of the output capacitor. Using ceramic capacitors, the impedance at the switching frequency is dominated by the capacitance. The output voltage ripple is mainly caused by the capacitance. For simplification, the output voltage ripple can be estimated by: ΔVOUT ⎛ V ⎞ VOUT = × ⎜ 1 − OUT ⎟ 2 VIN ⎠ 8 × fS × L1 × C2 ⎝ SW R4 VIN R3 4 5 R1 7 6 C2 8 2 3 C2A 1 GND OUT L1 R2 For tantalum or electrolytic capacitors, the ESR dominates the impedance at the switching frequency. For simplification, the output ripple can be approximated as: The high current paths (GND, IN, and SW) should be placed very close to the device using short, direct, and wide traces. The input capacitor needs to be as close as possible to the IN and GND pins. The external feedback resistors should be placed next to the FB pin. Keep the switching node SW short and away from the feedback network. C1A C1 Figure 3: Layout Recommendation MP2144 Rev. 1.03 12/20/2012 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 12 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER TYPICAL APPLICATION CIRCUIT U1 VIN VIN 2.5-5.5V 2 GND R4 499k EN SW SW IN 3 MP2144 8 VOUT GND OUT 5 EN R1 200k R3 100k PG C2A NS 1206 1 FB 7 PG GND 4 AGND 6 R2 200k Figure 4: MP2144 Typical Application Circuit MP2144 Rev. 1.03 12/20/2012 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 13 MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER PACKAGE INFORMATION TSOT23-8 See note 7 EXAMPLE TOP MARK PIN 1 ID RECOMMENDED LAND PATTERN TOP VIEW SEATING PLANE SEE DETAIL ''A'' FRONT VIEW SIDE VIEW NOTE: DETAIL ''A'' 1) ALL DIMENSIONS ARE 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 0.10 MILLIMETERS MAX. 5) JEDEC REFERENCE IS MO-193, VARIATION BA. 6) DRAWING IS NOT TO SCALE. 7) PIN 1 IS LOWER LEFT PIN WHEN READING TOP MARK FROM LEFT TO RIGHT, (SEE EXAMPLE TOP MARK) NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. 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. MP2144 Rev. 1.03 12/20/2012 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 14