MP2155 The Future of Analog IC Technology DESCRIPTION The MP2155 is a highly efficient, low quiescent current Buck-Boost converter, which operates from input voltage above, below and equal to the output voltage. The device provides power solution for products powered by a one-cell Lithium-Ion or multi-cell alkaline battery applications where the output voltage is within battery voltage range. The MP2155 uses a current mode, fixed frequency PWM control for optimal stability and transient response. The fixed 1MHz switching frequency and integrated low RDS(ON) N-channel and P-channel MOSFETs minimize the solution footprint while maintaining high efficiency. High Efficiency Single Inductor Buck-Boost Converter with 2.2A Switches FEATURES • • • • • • • • • • • • High Efficiency up to 95%. Load Disconnect During Shutdown Input Voltage Range: 2V to 5.5V Adjustable Output Voltage from 1.5V to 5V 3.3V/1A Load Capability from 2.7V-to-5.5V Vin 1MHz Switching Frequency Pulse Skipping Mode at Light Load Typical 80μA Quiescent Current Internal Loop Compensation for Fast Response Internal Soft Start OTP, Hiccup SCP Available in Small 3x3mm QFN10 Package To ensure the longest battery life MP2155 has an optional pulse skipping mode that reduces switching frequency under light load conditions. For other low noise applications where variable frequency power save mode may cause interference, the logic control input MODE pin forces fixed frequency PWM operation under all load conditions. APPLICATIONS The MP2155 operates with input voltage from 2V to 5.5V to provide adjustable output voltage (1.5V to 5V). With an input from 2.7V to 5.5V it can supply a maximum 1A current to load at 3.3V output voltage. The MP2155 is available in small QFN10-3x3mm package. All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. • • • • • • Battery-Powered Products Portable Instruments Tablet PCs POS Systems GSM/GPRS System Controls “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 1 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES ORDERING INFORMATION Part Number* MP2155GQ* Package QFN10 (3X3) Top Marking ADR * For Tape & Reel, add suffix –Z (e.g. MP2155GQ–Z); PACKAGE REFERENCE TOP VIEW VOUT 1 10 FB SW2 9 AGND 8 VCC 2 PGND 3 EP SW1 4 7 MODE/ SYNC VIN 5 6 EN ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance IN to GND .....................................–0.3V to 6.5V SW1/2 to GND ......–0.3V(-2V for <10ns) to 6.5V All Other Pins ...............................–0.3V to 6.5 V Junction Temperature ...............................150°C Lead Temperature ....................................260°C (3) Continuous Power Dissipation (TA = +25°C) QFN10 3X3mm .......................................... 2.5W Storage Temperature............... -65°C to +150°C 3X3 QFN10............................. 50 ...... 12... °C/W Recommended Operating Conditions (4) Supply Voltage VIN .............................2V to 5.5V Output Voltage VOUT ...........................1.5V to 5V Operating Junct. Temp. (TJ).... –40°C to +125°C MP2155 Rev. 1.0 1/26/2014 (5) 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. © 2014 MPS. All Rights Reserved. 2 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES ELECTRICAL CHARACTERISTICS VIN = VCC=VEN=3.3V, TJ = 25°C, unless otherwise noted. Parameter Symbol Condition Under voltage lockout threshold Feedback voltage VUVLO Typ Max Units VCC rising 1.8 1.9 V VCC falling 1.60 VFB for 496 506 mV 900 1000 1300 kHz 2000 kHz 1 0.4 3.1 0 A A mΩ mΩ μA μA V V V V μA μA TSHDN 160 ℃ THYS 20 ℃ FREQ 1000 1.8 Isw RDS(ON)-N RDS(ON)-P IQ VFB=0.65V IS VEN=0V 2.2 1.8 105 120 80 1.2 0.4 1.2 EN input current IEN Thermal shutdown(5) Thermal shutdown hysteresis V 486 Oscillator frequency Frequency range synchronization Primary current limit Secondary current limit NMOS switch on resistance PMOS switch on resistance Quiescent current Shutdown current MODE input low voltage MODE input high voltage EN input low voltage EN input high voltage Min (5) VEN=3.3V VEN=0V Notes: 5) Guaranteed by engineering sample Characterization, not tested in production. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 3 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL CHARACTERISTICS VIN = 3.3V, VOUT = 3.3V, L = 3.3µH, COUT=2x22uF, TA = +25ºC, unless otherwise noted. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 4 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.3V, VOUT = 3.3V, L = 3.3µH, COUT=2x22uF, TA = +25ºC, unless otherwise noted. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 5 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 3.3V, L = 3.3µH, COUT=2x22uF, TA = +25ºC, unless otherwise noted. Notes: 6) Tested with 1.8A inductor peak current at 3.3V input point. Under other VIN conditions, it takes the same current limit variation trend with VIN into consideration as “Current Limit vs. Input Voltage” curve shows" MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 6 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 3.3V, L = 3.3µH, COUT=2x22uF, TA = +25ºC, unless otherwise noted. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 7 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 3.3V, L = 3.3µH, COUT=2x22uF, TA = +25ºC, unless otherwise noted. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 8 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 3.3V, L = 3.3µH, COUT=2x22uF, TA = +25ºC, unless otherwise noted. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 9 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 3.3V, L = 3.3µH, COUT=2x22uF, TA = +25ºC, unless otherwise noted. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 10 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES PIN FUNCTIONS Pin # Name 1 VOUT 2 3 4 5 6 7 8 9 10 - Description Buck-Boost converter output. Switch pin-Internal switches are connected to this pin. Connect inductor between SW1 and SW2 SW2. PGND Power ground. Switch pin-Internal switches are connected to this pin. Connect inductor between SW1 and SW1 SW2. VIN Supply voltage for power stage. EN ON/OFF control, it’s not recommended to leave this pin float. Operation mode selection. If MODE pin is low, the MP2155 automatically switches between PSM and fixed frequency PWM according to the load level. If MODE pin is pulled high, the MODE/ MP2155 works always in PWM mode. SYNC External clock can be applied to MODE pin for changing switching frequency. This pin is sensitive to noise, so it should be strongly pulled up above 1.2V or pulled down below 0.4V. Must NOT leave it float. VCC Supply voltage for control stage. AGND Signal ground, should be connected to PGND externally. Feedback to set output voltage. Keeps this pin and associated trace far from noise source FB like SW. EP Thermal pad, which is recommended to connected to PGND. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 11 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES L SW1 INPUT SW 2 VOUT VIN SWA Current sense OUTPUT SW D Cin SWC SWB PGND Cout Gate drivers Oscillator Reverse Comparator FB Vc- Buck Buck Comparator EA Level shift EN Voltage Reference Buck- Boost Control logic PSM Control Vc- Boost Slope Generator VCC MODE /SYNC Boost Comparator Current sense AGND SS Cap Figure 1— Function Block Diagram MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 12 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES OPERATION The MP2155 is a high efficiency, dual mode buck-boost converter that provides output voltage above, equal to or below the input voltage. When the MODE pin is held high, the MP2155 operates in constant-frequency PWM mode with peak current mode control. As shown in Figure 1, the output voltage is sensed via the FB pin through an external resistor-divider from the output to ground. The voltage difference between FB pin and the internal reference is amplified by error amplifier to generate control signal VC-Buck. By comparing VC-Buck with internal compensation ramp (the sensed SWA’s current with slope compensation) through Buck comparator, a PWM control signal for PWM buck mode is outputted. Another control signal VC-Boost is derived from VCthrough level shift. Similarly, VC-Boost Buck compares with the same ramp signal through Boost comparator and generates the PWM control signal for PWM boost mode. The switch topology for the buck-boost converter is shown in Figure 2. Vin Vout SW1 SW2 SWD SWA SWB SWC MP2155 Figure 2—Buck-Boost Switch Topology Buck Region (Vin > Vout) When the input voltage is significantly greater than output voltage, which means the converter can deliver energy to load within the maximum duty cycle of SWA, so the converter operates in buck mode. The control signal VC-Boost is always lower than compensation ramp because Buck can deliver enough energy to load, thus switch D turns on constantly and switch C remains off. Meanwhile, VC-Buck compares with compensation ramp normally and generates PWM signal, therefore, switches A and B are pulse-widthmodulated to produce the required duty cycle to support the output voltage. MP2155 Rev. 1.0 1/26/2014 Buck-Boost Region (Vin ≈ Vout) When Vin is close to Vout, due to duty cycle limit of SWA the converter isn’t able to provide wanted energy to load. In this case SWA will be turned on over all the period, that is, there is no BD operation(SWB and SWD being turned on simultaneously). Now a new period begins. Since there is no BD in last period, an offset voltage is added to the ramp signal to make the ramp signal easily hit VC-Buck. At the same time due to loop regulation VC-Boost (as well as VC-Buck) rises to some level, so that the ramp signal can intersect it to produce the PWM driving signal for Boost operation. After SWC is turned off the ramp signal continues rising (the actual inductor current may rise or fall depending on the difference between Vin and Vout), when the ramp intersects VC-Buck, PWM signal for Buck operation then is generated. Now the buck’s duty cycle is within its limit, so there is BD operation in current period, which means next period the offset voltage will be removed. This is the socalled buck-boost region. With heavy load due to voltage drop on switches the actual input range for this region may be a little wide. Boost Region (Vin < Vout) When the input voltage is significantly lower than output voltage, the converter operates in boost mode. The control signal VC-Buck is always higher than compensation ramp even with the offset voltage always added, thus switch A turns on continuously and switch B remains off. Meanwhile, VC-Boost compares compensation ramp normally and generates PWM signal, therefore, switches C and D are pulse-widthmodulated to produce the required duty cycle to support the output regulation voltage. PSM When Mode Pin is pulled down below the low level threshold, the MP2155 will automatically enter PSM if load is light. When working in PSM, a train of SW pulses are initiated by a Boost operation, and ended with BD operation. During this process, SWD will be turned off if inductor current is below about 100mA. In actual www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 13 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES waveforms the current may be much lower than this value when SWD is turned off because of internal delay. SCP/OCP vs. two current limits There are two current limits in MP2155. The primary one is for steady PWM operation and it’s typically from 2A to 3A, depending on Vin; The secondary one is for limiting inrush current at startup, it’s typically 1.6A to 1.9A, depending on Vin, too. When load is over heavy, the primary limit would protect MP2155 from being over thermal. Therefore Vout would drop due to OCP. If Vout drops below 0.6 times normal output, a hiccup period is initiated to protect MP2155. this is the SCP. In hiccup period, SWA and SWC are turned off while SWB and SWD are turned on. After the hiccup period ends, a soft re-startup begins. Because Vout is below 1V (due to over load or output short), the secondary current takes charge of this process. After Vo rises above 1V, primary current limit get in charge of. Now if load is still over heavy (or output short still exists) such that after SS ends Vout is still below 0.6*VOUT_NORMAL and current hits one of the limits, another hiccup period begins. However if the load recovers to normal value during re-startup so that current doesn’t hit its limit, or, Vout already rises above 0.6*VOUT_NORMAL, the restartup succeeds, and MP2155 enter normal operation. As to the input/EN startup, the cases are same as the SCP recovery process. MP2155 Rev. 1.0 1/26/2014 Enable The MP2155 has a dedicated enable control pin (EN). The device operates when it is set high. If it is set low the device stops switching, all the internal blocks are turned off. Tie EN to Vin through a resistor for automatic start up. Due to EN bias or leakage current, the value of this resistor should be set to provide EN pin with a current above 10uA. Any signal to drive this pin should be limited to 100uA if the maximum voltage of this signal is above 6.5V. Internal Soft-start When EN pin is pulled high, and at the same time the voltage on Vcc pin is above its UVLO rising threshold MP2155 will start up with Soft-start function to eliminate output overshoot. Soft-start also functions during SCP recovery. Under-Voltage Lockout The under voltage lockout (UVLO) is implement to protect the device from improper operating at insufficient supply voltage. When the supply voltage at VCC is below the UVLO threshold the device is in shutdown mode. The UVLO rising threshold is about 1.8V with 200mV hysteresis. Over-Temperature Protection An internal temperature sensor continuously monitors the IC junction temperature. If the IC temperature exceeds 160ºC typically the device stops operating. As soon as the temperature falls below 140 ºC typically normal operation is restored. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 14 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES APPLICATION INFORMATION Setting the Output Voltage To use MP2155 correctly, A resistor divider must be connected between Vout and GND, and the middle point of the divider connected to FB pin as shown in Typically Application on page 1. VOUT − 1) × R2 (1) VFB High R2 resistance (eg. 100kΩ) can reduce the power consumption, while lower than 1MΩ resistance is recommended for R1 for good output accuracy. R1 = ( Inductor Selection The inductor is the key passive component for switching converters. With a buck-boost device, the inductor selection affects the boundary conditions in which the converter works, as buck at the maximum input voltage and as a boost at the minimum input voltage. Two critical inductance values are then obtained according to the following formulas. L MIN−BUCK = L MIN−BOOST = VOUT × ( VIN(MAX ) − VOUT ) VIN(MAX ) × FREQ × ΔIL VIN(MIN) × ( VOUT − VIN(MIN) ) VOUT × FREQ × ΔIL (2) (3) Where: FREQ: minimum switching frequency ∆IL: the peak-to-peak inductor ripple inductor current. As a rule of thumb, the peak-to-peak ripple can be set at 10%-20% of the output current. The minimum inductor value for the application is the higher one between Equation 2 and Equation 3. In addition to the inductance value the maximum current the inductor can handle must be calculated in order to avoid saturation. IPEAK −BUCK = IOUT VOUT × ( VIN(MAX ) − VOUT ) + 2 × VIN(MAX ) × FREQ × L η IPEAK −BOOST = VOUT × IOUT VIN(MIN) × ( VOUT − VIN(MIN) ) (5) + VOUT × FREQ × L η × VIN(MIN) (4) Where η is the estimated efficiency of MP2155. The maximum of the two values above must be considered when selecting the inductor. Input and Output Capacitor Selection It is recommended to use ceramic capacitors with low ESR as input and output capacitors in order to filter any disturbance present in the input line and to obtain stable operation. Minimum values of 10uF for both capacitors are needed to achieve good behavior of the device. The input capacitor must be placed as close as possible to the device. Other Consideration MP2155 employs the classic hiccup mode for SCP. This method has an inherited drawback: if the output short is released at a time closed to SS end, then Vo would has overshoot. To attenuate Vo overshoot at SCP recovery, a forward RC series can be connected in parallel with high side resistor of FB divider, as R3 and C5 in Figure 5 shows. The RC acts as a soft startup when Vo short is released at the time of internal SS’s end. PCB Layout Guide 1. Input and output capacitors should be close to MP2155’s Vin, Vout and PGND pins. 2. The wire connecting input capacitor to Vcc pin should be as short as possible. For better performance in noisy environment, an additional capacitor very close to Vcc pin can be used to bypass noise for Vcc. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 15 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES 5 Figure 3 shows an example of PCB layout for which the reference schematic is shown on Figure 4. VIN 2 U1 VOUT SW2 VIN SW1 4 L1 VOUT Cin 1 8 Vcc R1 MP 2155 GND 7 FB 10 R2 AGND 3 EN GND GND GND 9 6 GND Cout Cout MODE / SYNC PGND 3. FB resistor divider should be very close to FB pin, and keep FB trace far away from noise. GND Figure 4—Reference Circuit for PCB Guide L1 Design Example Below is a design example following the application guidelines for the specifications: Table 1: Design Example Cin EN Cout MODE R2 VIN (V) VOUT (V) 2-5.5 3.3V The detailed application schematic is shown in Figure 5 and its performance can be found in TPC section. R1 Top Layer L1 Bottom Layer Figure 3—PCB Layout MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 16 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES TYPICAL APPLICATION CIRCUITS 5 C1 NS GND 3 1 1 FB 7 10 EN JP1 3 22uF 10V C3 22uF 10V C4 C5 68pF GND R2 143k AGND 6 R3 750k GND GND 9 2 R1 820k MODE/SYNC JP2 1 GND 2 VOUT GND 2 VOUT=3.3V MP2155 8 Vcc PGND 3 C2 10uF/6.3V VIN U1 SW2 VIN=2-5.5V SW1 4 L1 3.3uH GND Figure 5—3.3V Output Application Circuit 5 C2 10uF/6.3V C1 NS GND 3 1 2 FB 2 7 R3 681k 22uF 10V C3 22uF 10V C4 C5 22pF AGND EN 3 JP1 6 R1 820k R2 91k GND GND GND 9 2 10 MODE/SYNC JP2 1 GND VOUT GND VOUT=5V MP2155 1 8 Vcc PGND 3 VIN U1 SW2 VIN=2-5.5V SW1 4 L1 3.3uH GND Figure 6—5V Output Application Circuit MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 17 MP2155 –HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2.2A SWITCHES PACKAGE INFORMATION QFN10 (3mmX3mm) 2.90 3.10 0.30 0.50 PIN 1 ID MARKING 0.18 0.30 2.90 3.10 PIN 1 ID INDEX AREA 1.45 1.75 PIN 1 ID SEE DETAIL A 10 1 2.25 2.55 0.50 BSC 6 TOP VIEW 5 BOTTOM VIEW PIN 1 ID OPTION A R0.20 TYP. PIN 1 ID OPTION B R0.20 TYP. 0.80 1.00 0.20 REF 0.00 0.05 SIDE VIEW DETAIL A NOTE: 2.90 0.70 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH. 3) LEAD COPLANARITY SHALL BE0.10 MILLIMETER MAX. 4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION VEED-5. 5) DRAWING IS NOT TO SCALE. 1.70 0.25 2.50 0.50 RECOMMENDED LAND PATTERN 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. MP2155 Rev. 1.0 1/26/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 18