MP2113 1.5A Synchronous Step-Down Converter with Dynamic Voltage Control The Future of Analog IC Technology FEATURES DESCRIPTION • The MP2113 is a fully integrated, internally compensated 1.5MHz fixed frequency PWM step-down converter with dynamic output voltage control. User can select two operation modes, forced PWM and asynchronous mode. Force PWM is ideal for high load operation while asynchronous mode improves efficiency at light load condition. Each mode has independent output level that can be set by the user to optimize the power efficiency. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) Battery, with an input range from 2.7V to 6V. The MP2113 can provide 1.5A of load current in forced PWM mode and 50mA in asynchronous mode. Both output voltage can be regulated to as low as 0.6V. • • • • • • • • • • • • • • • MP2113 integrates the high side switch, a synchronous rectifier for forced PWM mode and a Schottky diode for asynchronous mode operation. With peak current mode control and internal compensation, the MP2113 is stable with ceramic capacitors and small inductors. Fault condition protection includes cycle-bycycle current limiting and thermal shutdown. MP2113 is available in 2mmx3mm QFN package. the small User Selectable Operation Mode: Forced PWM and Asynchronous Mode User Programmable Output Level for Each Operation Mode Dynamic Output Voltage Control Up to 1.5A Output Current for Forced PWM Mode, 50mA for Asynchronous Mode Internal Power MOSFET Switches and Schottky diode Stable with Low ESR Output Ceramic Capacitors Up to 95% Efficiency 1µA Shutdown Current. 1.5MHz Switching Frequency Thermal Shutdown Cycle-by-Cycle Over Current Protection Short circuit protection Power-Good Output 2.7-6V Input Operation Range Output Adjustable from 0.6V to VIN Available in 8-pin 2x3mm QFN Package APPLICATIONS • • • • • 8-pin DVD+/-RW Drives Smart Phones PDAs Digital Cameras Portable Instruments “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Efficiency vs. Load Current MP2113 95 PGOOD IN VOUT SW 1.8V/1.5A CIN 4.7uF R1 301K CTRL FB R3 200K EN DRN GND Vin=3V 90 L1 2.2uH R2 604K COUT 22uF EFFICIENCY(%) VIN 2.7-6V R4 500K Vin=5V 85 80 Vin=6V 75 70 65 60 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 LOAD CURRENT(A) MP2113 Rev. 1.0 4/4/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 1 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL ABSOLUTE MAXIMUM RATINGS (1) PACKAGE REFERENCE IN to GND .................................. –0.3V to + 6.5V SW to GND .......................... –0.3V to VIN + 0.3V PGOOD, EN, CTRL to GND ....... –0.3V to +6.5V FB, DRN to GND ........................ –0.3V to +6.5V Operating Temperature ............. –40°C to +85°C Junction Temperature ............................... 150°C Lead Temperature .................................... 260°C Storage Temperature ............. –65°C to +150°C TOP VIEW FB 1 8 DRN PGOOD 2 7 EN GND 3 6 CTRL SW 4 5 IN Recommended Operating Conditions (2) Supply Voltage VIN ............................. 2.7V to 6V Operating Temperature ............. –40°C to +85°C EXPOSED PAD ON BACKSIDE, CONNECT TO GND Thermal Resistance (3) θJA θJC QFN8 (2mm x 3mm) ............... 50 ...... 12... °C/W Part Number* Temperature Package QFN8 (2mm x 3mm) Top Marking –40°C to +85°C MP2113DS MP2113DD * 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 JESD51-7, 4-layer PCB. For Tape & Reel, add suffix –Z (eg. MP2113DD–Z) For RoHS compliant packaging, add suffix –LF (eg. MP2113DD–LF–Z) ELECTRICAL CHARACTERISTICS (4) VIN = VEN = 3.6V, TA = +25°C, unless otherwise noted. Parameters Condition Supply Current Shutdown Current Thermal Shutdown Trip Threshold PGOOD Upper Trip Threshold PGOOD Lower Trip Threshold PGOOD Output Lower Voltage PGOOD Deglitch Timer EN Trip High Threshold EN Trip Low Threshold EN Input Control CTRL Trip Threshold CTRL Input Current DRN output resistance MP2113 Rev. 1.0 4/4/2011 Min Typ VEN_ = VIN, VCTRL_=VIN (forced PWM Mode) VEN_ = VIN, VCTRL_=0 (asynchronous Mode) VEN =0V, VIN=6V Hysteresis=20°C FB wrt the nominal value FB wrt the nominal value ISINK=1mA Transient Deglitch Max 500 650 55 85 0.1 145 12 -10 1 µA 0.3 200 1.5 VEN=0V VEN=6V Rising edge, VIN-0.8V Falling edge GND VEN=0V to 6V CTRL=VIN CTRL=0 Units 0.1 6 0.5 1.0 1.8 -1 10 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 0.1 0.4 1 100 µA °C % % V µs V V µA µA V V µA Ω MΩ 2 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL ELECTRICAL CHARACTERISTICS (continued) (4) VIN = VEN = 3.6V, TA = +25°C, unless otherwise noted. Parameters Condition IN Undervoltage Lockout Threshold IN Undervoltage Lockout Hysteresis Rising Edge Regulated FB Voltage Regulated FB Voltage Hysteresis FB Input Bias Current SW PFET On Resistance SW NFET On Resistance SW Schottky Diode Forward Voltage SW PFET Leakage Current SW NFET Leakage Current SW PFET Peak Current Limit Oscillator Frequency TA=+25°C -40°C≤ TA≤ +85°C CTRL = 0 (Async Mode) VFB=0.7V ISW=100mA ISW=-100mA ISW= -50mA VEN=0V; VIN=6V; VSW =0V VEN=0V; VIN=6V; VSW =6V Duty Cycle=100%, Current Pulse Width <1mS Min Typ -1 -5 2.40 160 0.600 0.600 12 -2 0.25 0.19 -0.5 0.1 1.5 1.7 2.2 1.3 1.5 0.588 0.582 -50 Max 2.65 0.612 0.618 20 +50 1 5 Units V mV V mV nA Ω Ω V µA µA A 1.7 MHz Note: 4) Production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization. PIN FUNCTIONS Pin # 1 2 3 4 5 6 7 8 Name Description Feedback input. Power-good indicator output. “Open-drain” output indicating that the output is within 10% of the final regulation value. “Low” output indicates output is more than 10% PGOOD lower than regulation level. PGOOD is pulled down in shutdown. PGOOD comparator shall have 200us deglitch timer to avoid false trigger during transition of operation modes. GND Ground pin. SW Switch node to the inductor. IN Input supply pin. Input to control the operation mode. “High” set MP2113 in forced PWM mode, CTRL DRN=Low (Pull Down) and “Low” sets MP2113 in low power asynchronous mode, DRN=High. CTRL is pulled up to VIN with 1uA current. Enable input, “High” enables MP2113. EN is pulled to GND with 1Meg internal EN resistor. Drain output of an internal switch, controlled by CTRL input. DRN is open circuit DRN when CTRL is “low”, and DRN is pulled to ground with on resistance less than 100ohm when CTRL is “high”. FB MP2113 Rev. 1.0 4/4/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 3 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL TYPICAL PERFORMANCE CHARACTERISTICS VIN = 6V, VOUT = 1.8V, L=2.2uH, TA = +25ºC, PWM Mode, unless otherwise noted. Enabled Supply Current vs. Input Voltage Efficiency vs. Load Current EFFICIENCY(%) 90 Vin=5V 85 Vin=6V 80 75 70 65 60 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 180 600 500 PWM Mode 400 300 200 100 0 2.5 3 3.5 4.5 5 5.5 60 30 -30 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 6 INPUT VOLTAGE(V) 15 10 5 Load Regulation 0.30% Vin=5V 0.20% LOAD REGULATION 20 1 0.10% Vin=6V 0.00% -0.10% -0.20% -0.30% Vin=3V -0.40% 0.1 1.25 4 10 OUTPUT VOLTAGE (V) 25 1 90 Operating Range 30 0.75 120 INPUT VOLTAGE(V) Case Temperature Rise vs. Output Current 0.5 150 0 ASYN Mode LOAD CURRENT(A) 0 0.25 DISABLED SUPPLY CURRENT (uA) Vin=3V ENABLED SUPPLY CURRENT(uA) 95 Disabled Supply Current vs. Input Voltage 1.5 -0.50% 2 3 OUTPUT CURRENT(A) 4 5 7 6 0 0.4 0.8 1.2 1.6 OUTPUT CURRENT (A) INPUT VOLTAGE (V) Peak Current vs. Duty Line Regulation 0.40% 4.5 0.30% LINE REGULATION PEAK CURRENT(A) Io=0A 0.20% 0.10% 0.00% Io=1A -0.10% -0.20% -0.30% Io=1.5A 4 3.5 3 2.5 -0.40% -0.50% 2 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) MP2113 Rev. 1.0 4/4/2011 6 25 35 45 55 65 75 85 95 DUTY CYCLE(% ) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 4 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 6V, VOUT = 1.8V, L=2.2uH, TA = +25ºC, PWM Mode, unless otherwise noted. Output Short Short Recovery Enable Startup IOUT=1.5A IOUT=1.5A No Load VOUT 1V/div VOUT 1V/div VSW 5V/div VOUT 1V/div VSW 5V/div EN 5V/div PG 2V/div PG 2V/div IInductor 2A/div PG 2V/div IInductor 1A/div IInductor 1A/div 10us/div Enable Startup Power up IOUT=1.5A No Load VOUT 1V/div Power up IOUT=1.5A VOUT 1V/div EN 5V/div PG 2V/div IInductor 1A/div 100us/div 200us/div VOUT 1V/div VIN 5V/div VIN 5V/div PG 2V/div PG 2V/div IInductor 1A/div IInductor 1A/div 100us/div 100us/div 100us/div Input Ripple Voltage Output Ripple Voltage Load Transient Response IOUT=1.5A IOUT=1.5A Load: 0.75A--1.5A, slew rate: 1A/us VOUT 10mV/div VOUT 20mV/div VIN 10mV/div VSW 5V/div VSW 5V/div IInductor 1A/div 200ns/div MP2113 Rev. 1.0 4/4/2011 IOUT 500mA/div 200ns/div www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 400us/div 5 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 6V, VOUT = 1.8V, L=2.2uH, TA = +25ºC, PWM Mode, unless otherwise noted. Output Short for ASYN Mode Short Recovery for ASYN Mode Enable Startup for ASYN Mode VOUT=0.9V, IOUT=50mA VOUT=0.9V, IOUT=50mA VOUT=0.9V, No load VOUT 500mV/div VOUT 500mV/div VOUT 500mV/div VSW 5V/div VSW 5V/div EN 5V/div PG 1V/div PG 1V/div PG 1V/div IInductor 2A/div IInductor 500mA/div IInductor 2A/div 20us/div 100us/div 200us/div Power up for ASYN Mode Enable Startup for ASYN Mode Power up for ASYN Mode VOUT 500mV/div EN 5V/div PG 1V/div IInductor 500mA/div VOUT 500mV/div VOUT 500mV/div VIN 5V/div VIN 5V/div PG 1V/div PG 1V/div IInductor 500mA/div IInductor 500mA/div 100us/div 100us/div Output Ripple Voltage for ASYN Mode Output Ripple Voltage for ASYN Mode VOUT=0.9V, No Load IOUT=50mA, VOUT=0.9V 100us/div VOUT 20mV/div VOUT 20mV/div VOUT 500mV/div VSW 5V/div VSW 5V/div VSW 500mV/div IInductor 50mA/div CTRL 5V/div IInductor 500mA/div 100ms/div MP2113 Rev. 1.0 4/4/2011 IOUT=50mA, VOUT=0.9V VOUT=0.9V, No load IOUT=50mA, VOUT=0.9V IInductor 2A/div 10us/div www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 4us/div 6 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 6V, VOUT = 1.8V, L=2.2uH, TA = +25ºC, PWM Mode, unless otherwise noted. VOUT 500mV/div VOUT 500mV/div VOUT 500mV/div CTRL 5V/div VSW 5V/div CTRL 5V/div VSW 5V/div CTRL 5V/div VSW 5V/div IInductor 1A/div IInductor 1A/div IInductor 1A/div 4us/div MP2113 Rev. 1.0 4/4/2011 40us/div www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 20us/div 7 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL OPERATION IN Bias & Voltage Reference EN 0.66V 0.54V IAMP 10X + 0.04 - Current Sense Amp Feedback Error Amp 0.6V ICS Slope Comp + FB + PWMCMP EAO EAMP - FB CC 17pF + PWM - Main Switch (PCH) RZ 1.2Meg 1.5MHz Oscillator Async. Control 0.60V SW PWM CTRL DRN DH OSC Control Synchronous Rectifier (NCH) DL Logic (fixed-on PFM) Schottky Diode PGOOD + PG_COMP + - 0.66V NOFF + COMP 0.54V ReverseCurrent Stop Comparator Vth DC GND Figure 1-Functional Block Diagram The MP2113 is a fixed frequency 1.5MHz current mode 1.5A step-down converter with dynamic voltage control. It has user selectable two operation modes: forced PWM mode for high load and asynchronous mode for light load. The output voltage for each mode can be set independently, through an external resistor divider and a control pin. MP2113 is optimized for low voltage, Li-Ion battery powered applications where high efficiency and small size are critical. Forced PWM Mode The forced PWM mode uses a high side PFET main switch and a low side synchronous rectifier, and always operates in continuous conduction mode. Thus it simplifies the control scheme and eliminates the random spectrum noise due to discontinuous conduction mode. The steady state duty cycle D for this mode can be calculated as: D = TON × fOSC × 100% ≈ MP2113 Rev. 1.0 4/4/2011 VOUT × 100% VIN Where TON is the main switch on time and fOSC is the oscillator frequency (1.5MHz typ.). Current Mode PWM Control Slope compensated current mode PWM control provides stable switching and cycle-by-cycle current limiting for superior load and line response as well as protection of the internal main switch and synchronous rectifier. The MP2113 switches at a constant frequency (1.5MHz) and modulates the inductor peak current to regulate the output voltage. Specifically, for each cycle the PWM controller forces the inductor peak current to an internal reference level derived from the feedback error voltage. At normal operation, the main switch is turned on at each rise edge of the internal oscillator, and remains on for a certain period of time to ramp up the inductor current. As soon as the inductor current reaches the reference level, the main switch is turned off and immediately the synchronous rectifier will be turned on to provide the inductor current. In forced PWM mode, the synchronous rectifier will stay on until the next oscillator cycle. www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 8 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL Dropout Operation The MP2113 allows the main switch to remain on for more than one switching cycle to increase the duty cycle when the input voltage is dropping close to the output voltage. When the duty cycle reaches 100%, the main switch is held on continuously to deliver current to the output up to the PFET current limit. In this case, the output voltage becomes the input voltage minus the voltage drop across the main switch and the inductor. Short Circuit Protection When the output is shorted to ground, the oscillator frequency is reduced to prevent the inductor current from increasing beyond the PFET current limit. The PFET current limit is also reduced to lower the short circuit current. The frequency and current limit will return to the normal values once the short circuit condition is removed and the feedback voltage approaches 0.6V. forced PWM mode and a lower level for asynchronous mode. MP2113 is designed to optimally ramp up and down the output voltage when CTRL changes state. Typically it takes about 10µs to ramp up the voltage and 30µs to ramp down the voltage. PGOOD Indicator MP2113 provides an open-drain PGOOD output that goes high after output level reaches regulation during startup. During mode switching where the output voltage level could be changed, there is a 200us de-glitch time on PGOOD to allow the output to settle to the desired level, and to avoid false trigger. PGOOD goes low if the output goes out of regulation by ±10% and the de-glitch times out, or when device enters shutdown. Maximum Load Current The MP2116 can operate down to 2.7V input voltage; however the maximum load current decreases at lower input due to a large IR drop on the main switch and synchronous rectifier. The slope compensation signal reduces the peak inductor current as a function of the duty cycle to prevent sub-harmonic oscillations at duty cycles greater than 50%. Conversely, the current limit increases as the duty cycle decreases. Asynchronous Mode Operation To improve efficiency at light load condition, user can set MP2113 to operate in asynchronous mode.The maximum load current for this mode is designed to be around 50mA. Mode Switching User can switch between the two operation modes for MP2113 by toggling the CTRL input pin on the fly. Bring CTRL high will put MP2113 in forced PWM mode and low will put MP2113 in asynchronous mode. CTRL pin can also be used to change the feedback resistor divider ratio, through an open-drain output DRN pin. Bring CTRL high will connect DRN to ground through a low resistance (<100Ω) switch; Bring CTRL low will put DRN pin to open circuit. User can simply connect a third resistor between feedback pin and DRN pin, to get a higher output level for MP2113 Rev. 1.0 4/4/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 9 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL APPLICATION INFORMATION Output Voltage Setting The external resistor divider sets the output voltage. The resistor R1 also sets the feedback loop bandwidth for the step-down converter. (see Figure 1). Choose R1 to be between 200k-300kΩ for optimal transient response. R2 is calculated using the desired output voltage for asynchronous mode: R2 = 0.6V −1 R1 R 2 VOUT _ FPWM 0.6V ⋅ R2 −1 R1 + R 2 If one want to have the same output voltage level for both operation mode, R3 will not be needed. Table 1—Resistor Selection vs. Output Voltage Setting VO_ASYNC/VO_FPWM 0.9V/1.8V 1.2V/1.8V 1.2V/2.5V 1.5V/3.3V R1 R2 R3 301kΩ (1%) 301kΩ (1%) 301kΩ (1%) 301kΩ (1%) 604kΩ (1%) 301kΩ (1%) 301kΩ (1%) 200kΩ (1%) 200kΩ (1%) 301kΩ (1%) 137kΩ (1%) 100kΩ (1%) Inductor Selection A 1µH to 10µH inductor with DC current rating at least 25% higher than the maximum load current is recommended for most applications. For best efficiency, the inductor DC resistance shall be <200mΩ. For most designs, the inductance value can be derived from the following equation: L= VOUT × (VIN − VOUT ) VIN × ∆IL × fOSC Where ∆IL is inductor ripple current. Choose inductor ripple current approximately 30% of the maximum load current, 1.5A. MP2113 Rev. 1.0 4/4/2011 ∆IL 2 Table 2—Suggested Inductors Manufacturer Wruth TDK R3 is then calculated using R1, R2 and the desired output voltage for forced PWM mode: R3 = IL(MAX ) = ILOAD + Toko R1 VOUT _ ASYNC The maximum inductor peak current is: Part Number Inductance (µH) 7447745022 636CY2R2M VLCF5020T2R2N2R6-1 2.2 Dimensions LxWxH (mm3) 5.8X5.2X2 2.2 6.8X6X3.5 2.2 5X5X2 Input Capacitor CIN Selection The input capacitor reduces the surge current drawn from the input and switching noise from the device. Ceramic capacitors with X5R or X7R dielectrics are highly recommended because of their low ESR and small temperature coefficients. For most applications, a 4.7µF capacitor is sufficient. Output Capacitor COUT Selection The output capacitor keeps output voltage ripple small and ensures regulation loop stable. The output capacitor impedance shall be low at the switching frequency. Ceramic capacitors with X5R or X7R dielectrics are recommended. For forced PWM mode operation, the output ripple ∆VOUT is approximately: VOUT ⋅ (V IN − VOUT ) 1 1 ( R ESR + ⋅ ) V IN ⋅ f OSC ⋅ L 8 f OSC ⋅ C OUT For asynchronous mode operation, the output ripple is the scaled amplitude of the feedback threshold hysteresis window: ∆VOUT = ∆VOUT = (0.606V − 0.594V ) ⋅ R1 + R 2 R2 Thermal Dissipation Power dissipation shall be considered when MP2113 operates at maximum 1.5A output current. If the junction temperature rises above 150°C, MP2113 will be shut down by internal thermal protection circuitry. The junction-to-ambient thermal resistance of the 8-pin QFN (2mm x 3mm) RΘJA is 50°C/W. The maximum allowable power dissipation is www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 10 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL about 1.6W when MP2113 is operating in a 70°C ambient temperature environment: PD MAX = 150 o C − 70 o C 50 o C / W = 1 .6 W PCB Layout The high current paths (GND, IN and SW) should be placed very close to the device with short, GND GND L1 C1 EN 5 6 7 4 3 2 PG DNR 8 1 FB SW GND C2 R2 IN CTRL R3 VIN direct and wide traces. Input capacitors should be placed as close as possible to the respective IN and GND pins. The external feedback resistors shall be placed next to the FB pins. Keep the switching nodes SW short and away from the feedback network. GND R1 R4 VOUT Top layer Bottom layer Figure 2-PCB Layout MP2113 Rev. 1.0 4/4/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 11 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL TYPICAL APPLICATION CIRCUITS MP2113 VIN 2.7-6V R4 500K PGOOD IN L1 2.2uH VOUT SW 1.8V/1.5A CIN 4.7uF R1 301K CTRL FB R3 200K EN R2 604K DRN COUT 22uF GND Figure 3-Typical Application Circuit MP2113 Rev. 1.0 4/4/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 12 MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL PACKAGE INFORMATION QFN8 (2mm x 3mm) 2.90 3.10 PIN 1 ID MARKING 0.30 0.50 0.18 0.30 1.90 2.10 PIN 1 ID INDEX AREA 1.65 1.85 8 PIN 1 ID SEE DETAIL A 1 1.50 1.70 0.50 BSC 4 5 TOP VIEW BOTTOM VIEW PIN 1 ID OPTION A 0.30x45º TYP. 0.80 1.00 PIN 1 ID OPTION B R0.20 TYP. 0.20 REF 0.00 0.05 SIDE VIEW DETAIL A 2.90 0.70 NOTE: 1.70 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH. 3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX. 4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION VCED-2. 5) DRAWING IS NOT TO SCALE. 0.25 1.60 0.50 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. MP2113 Rev. 1.0 4/4/2011 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 13