MP3209 MPS | Alldatasheet

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Technical content

1.4MHz, 350mA Boost Converter MP3209 Rev. 0.941 www.MonolithicPower.com 1 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. The Future of Analog IC Technology

DESCRIPTION

The MP3209 is a current mode step up converter intended for small, low power applications. The MP3209 switches at 1.4MHz and allows the use of tiny, low cost inductor and capacitor to achieve a solution less than 1mm in height. Internal soft start results in small inrush current and extends battery life. The MP3209 includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload. The MP3209 is available in small 5-pin TSOT23 and 2mm x 2mm ultra-thin QFN 8-pin packages.

FEATURES

  • 2.5V to 6V Input Voltage Range
  • On Board Power MOSFET
  • Uses Tiny Capacitors and Inductors
  • 1.4MHz Fixed Switching Frequency
  • Internally Compensated
  • Internal Soft-Start
  • Operates with Input Voltage as Low as 2.5V and Output Voltage as High as 22V
  • UVLO, Thermal Shutdown
  • Internal Current Limit
  • Available in TSOT23-5 and Ultra-Thin 2x2 QFN Packages

APPLICATIONS

  • Cell Phones
  • External Modems
  • Small LCD Displays
  • OLED Drivers All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION VIN 3V - 6V VOUT 15V 100pF MP3209 SWIN FBGND ENOFF ON EFFICIENCY (%) 10 20 30 40 50 60 LOAD CURRENT (mA) Efficiency vs Load Current VIN=4v VOUT=15v

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev. 0.941 www.MonolithicPower.com 2 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. PACKAGE REFERENCE Part Number* Package Temperature MP3209DJ TSOT23-5 –40°C to +85°C * For Tape & Reel, add suffix –Z (e.g. MP3209DJ–Z) For RoHS Compliant Packaging, add suffix –LF (Egg. MP3209DJ–LF–Z) ABSOLUTE MAXIMUM RATINGS (1) TOP VIEW GND IN NC EN SW NC FB GND Exposed pad connect to GND Part Number* Package Temperature MP3209DGU 2x2 UTQFN –40°C to +85°C * For Tape & Reel, add suffix –Z (egg. MP3209DGU–Z) For RoHS Compliant Packaging, add suffix –LF (Egg. MP3209DGU–LF–Z) Recommended Operating Conditions (2) Thermal Resistance (3) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its operating range. 3) Measured on approximately 1” square of 1oz. copper.

ELECTRICAL CHARACTERISTICS

VIN = VEN = 5V, TA = +25°C unless otherwise specified. Parameters Symbol Condition Min Typ Max Units Operating Input Voltage V IN 2.5 6 V UVLO Ramp Up V IN-UVLO 2.25 2.45 V UVLO Hysteresis 92 mV Supply Current (Shutdown) V EN = 0V 0.1 1 µA Supply Current (Quiescent) V FB = 1.3V 635 850 µA Switching Frequency f SW 1.15 1.4 1.65 MHz Maximum Duty Cycle V FB = 0V 80 85 % EN Threshold V EN Rising, VIN=2.5V 1.0 1.3 1.6 V EN Hysteresis 100 mV SW GND FB IN EN TOP VIEW

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev. 0.941 www.MonolithicPower.com 3 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS (continued) VIN = VEN = 5V, TA = +25°C unless otherwise specified. Parameters Symbol Condition Min Typ Max Units EN Input Bias Current V EN = 0V, VIN=6V 1 µA FB Voltage V FB 1.21 1.25 1.29 V FB Input Bias Current V FB = 1.25V –100 –30 nA SW On-Resistance (4) R DS (ON) 0.5 Ω SW Current Limit (4) Duty Cycle = 60% 0.35 A SW Leakage V SW = 15V 1 µA Thermal Shutdown (4) 160 °C Note: 4) Guaranteed by design.

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev. 0.941 www.MonolithicPower.com 4 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS C1=10µF, C2=4.7µF, L=22µH, R3=26.1kΩ, C3=100pF, Ta=25ºC. Unless otherwise noted. (Figure 2) )Am( TNERRUC MUMIXAM 100 200 300 400 500 600 700 800 30 40 50 60 07 80 90 DUTY CYCLE (%) Maximum Current vs Duty CycleSupply Shut Down Current )Am( TNERRUC )Au( TNERRUC Quiescent Current 10 20 30 40 50 60 70 80 VIN=4.5V VIN=4V VIN=3.5V VIN=3V IOUT=10mA VOUT=15VVIN=5V )V( EGATLOV TUPTUO )V( EGATLOV TUPTUO INPUT VOLTAGE(V) INPUT VOLTAGE(V) INPUT VOLTAGE(V) Line Regulation Load Regulation 200 40 60 80 100 200 40 60 80 100 1.0 0.8 0.6 0.4 0.2 0.0 1.0 0.8 0.6 0.4 0.2 0.0 12.4 12.2 12.0 11.8 11.6 11.4 )%( YCNEICIFFE )%( YCNEICIFFE )%( YCNEICIFFE)%( YCNEICIFFE 0 40 120 160 80 0 40 60 10020 120 80 LOAD CURRENT(mA) LOAD CURRENT(mA) LOAD CURRENT(mA) LOAD CURRENT(mA) LOAD CURRENT(mA) Efficiency vs. Load Current Efficiency vs. Load Current Efficiency vs. Load Current Efficiency vs Load Current VIN=6V VOUT=12V VIN=4V VOUT=12V VIN=5V VOUT=12V 12.3 12.2 12.1 12.0 11.9 11.8

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev.0.941 www.MonolithicPower.com 5 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) C1=10µF, C2=4.7µF, L=22µH, R3=26.1kΩ, C3=100pF, Ta=25ºC. Unless otherwise noted.

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev.0.941 www.MonolithicPower.com 6 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. PIN FUNCTIONS TSOT23-5 Pin # UTQFN8 Pin # Name Function 1 8 SW Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power inductor and output rectifier to SW. SW can swing between GND and 22V. 2 1, 5 GND Ground. 3 6 FB Feedback Input. FB voltage is 1.25V. Connect a resistor divider to FB. 4 4 EN Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input turns it off. When not used, connect EN to the input source for automatic startup. The EN pin cannot be left floating. 5 2 IN Input Supply Pin. Must be locally bypassed. 3, 7 NC No Connect. OPERATION The MP3209 uses a fixed frequency, peak current mode boost regulator architecture to regulate voltage at the feedback pin. The operation of the MP3209 can be understood by referring to the block diagram of Figure 1. At the start of each oscillator cycle the MOSFET is turned on through the control circuitry. To prevent sub-harmonic oscillations at duty cycles greater than 50 percent, a stabilizing ramp is added to the output of the current sense amplifier and the result is fed into the negative input of the PWM comparator. When this voltage equals the output voltage of the error amplifier the power MOSFET is turned off. The voltage at the output of the error amplifier is an amplified version of the difference between the 1.25V bandgap reference voltage and the feedback voltage. In this way the peak current level keeps the output in regulation. If the feedback voltage starts to drop, the output of the error amplifier in creases. This results in more current to flow through the power MOSFET, thus increasing the power delivered to the output. The MP3209 has internal soft start to limit the amount of input current at startup and to also limit the amount of overshoot on the output. The current limit is increased by a fourth every 40µs giving a total soft start time of 120µs. PWM COMPARATOR ERROR AMPLIFIER CCRC CONTROL LOGIC CURRENT SENSE AMPLIFIER SW GND FB 1.3MHz OSC 1.25V Figure 1—Functional Block Diagram

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev.0.941 www.MonolithicPower.com 7 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. APPLICATIONS INFORMATION COMPONENT SELECTION Setting the Output Voltage Set the output voltage by selecting the resistive voltage divider ratio. Use 510k Ω for the high- side resistor R1 of the voltage divider. Determine the low-side resistor R2 by the equation: FBOUT FB VV V R1R2 − where VOUT is the output voltage. (It is recommended to add feed-forward resistor R3 and C3 to improve the transient performance.) (Figure 2) Selecting the Input Capacitor An input capacitor is required to supply the AC ripple current to the inductor, while limiting noise at the input source. This capacitor must have low ESR, so ceramic is the best choice. Use an input capacitor value of 4.7μF or greater. This capacitor must be placed physically close to the IN pin. Since it reduces the voltage ripple seen at IN, it also reduces the amount of EMI passed back along that line to the other circuitry. Selecting the Output Capacitor A single 4.7 μF to 10 μF ceramic capacitor usually provides sufficient output capacitance for most applications. If larger amount of capacitance is desired for improved line support and transient response, tantalum capacitors can be used in parallel with the ceramic. The impedance of the ceramic capacitor at the switching frequency is dominated by the capacitance, and so the output voltage ripple is mostly independent of the ESR. The output voltage ripple V RIPPLE is calculated as: ( ) SWUTO INUTOLOAD RIPPLE f2CV VVIV ×× Where VIN is the input voltage, I LOAD is the load current, C2 is the capacitance of the output capacitor, and f SW is the 1.4MHz switching frequency. Selecting the Inductor The inductor is required to force the output voltage higher while being driven by the lower input voltage. Choose an inductor that does not saturate at the SW current limit. A good rule for determining the inductance is to allow the peak- to-peak ripple current to be approximately 30%- 50% of the maximum input current. Make sure that the peak inductor current is below 75% of the typical current limit at the duty cycle used to prevent loss of regulation due to the current limit variation. Calculate the required inductance value L using the equations: IfV ) V- (VVL SWOUT INOUTIN Δ××= IN )MAX(LOADOUT )MAX(IN V IV I ( ) )MAX(INI%50%30I −=Δ Where ILOAD(MAX) is the maximum load current, ΔI is the peak-to-peak inductor ripple current, and η is efficiency. For the MP3209, 10µH is recommended for input voltages less than 3.3V and 22µH for inputs greater than 3.3V. Selecting the Diode The output rectifier diode supplies current to the inductor when the internal MOSFET is off. To reduce losses due to diode forward voltage and reverse recovery, use a Schottky diode. Choose a diode whose maximum reverse voltage rating is greater than the maximum output voltage. For output voltage less than 20V, it is recommended to choose the CMH5H-3 for most applications. This diode is used for load currents less than 300mA. For ultra-low-profile applications, choose BAT54-02 Schottky diode. Use two BAT54-02 in parallel for high load current.

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev. 0.941 www.MonolithicPower.com 8 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. LAYOUT CONSIDERATIONS High frequency switching regulators require very careful layout for stable operation and low noise. All components must be placed as close to the IC as possible. Keep the path between MP3209, D1, and C2 extremely short for minimal noise and ringing. C1 must be placed close to the IN pin for best decoupling. All feedback components must be kept close to the FB pin to prevent noise injection on the FB pin trace. The ground return of C1 and C2 should be tied close to the GND pin. See the MP3209 demo board layout for reference.

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev. 0.941 www.MonolithicPower.com 9 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. TYPICAL APPLICATION CIRCUITS VOUT 12V 50mA CMHSH-3 SOD323 MP3209 SWIN FBGND EN 100pF VIN OFF ON Figure 2—V IN = 5V, VOUT = 12V, IOUT = 50mA Boost Circuit

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER MP3209 Rev. 0.941 www.MonolithicPower.com 10 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved.

PACKAGE INFORMATION

0.30 0.50 SEATING PLANE

0.95 BSC

0.84 0.90 1.00 MAX 0.00 0.10 TOP VIEW FRONT VIEW SIDE VIEW RECOMMENDED LAND PATTERN 2.80 3.00 1.50 1.70 2.60 3.00 1 3 0.09 0.20 NOTE: 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) DRAWING CONFORMS TO JEDEC MO-193, VARIATION AA. 6) DRAWING IS NOT TO SCALE. 0.30 0.500o-8o

0.25 BSC

2.60 TYP 1.20 TYP 0.95 BSC 0.60 TYP SEE DETAIL "A" DETAIL A

MP3209 – 1.4MHZ, 350mA BOOST CONVERTER NOTICE: The information in this document is subject to change wi thout notice. Users should warra nt and guarantee that third party Intellectual Property rights are not infringed upon w hen integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP3209 Rev. 0.941 www.MonolithicPower.com 11 11/30/2011 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. 2mm x 2mm UTQFN8 TOP VIEW BOTTOM VIEW 1.90 2.10 0.45 0.65 1.90 2.10 1.05 1.25 0.50 BSC 0.18 0.30 PIN 1 ID MARKING 0.60 0.50 0.25 RECOMMENDED LAND PATTERN

1.90 NOTE:

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) JEDEC REFERENCE IS MO-229, VARIATION VCCD-3. 5) DRAWING IS NOT TO SCALE. PIN 1 ID SEE DETAIL A 0.70 PIN 1 ID OPTION A R0.10 TYP. PIN 1 ID OPTION B R0.20 TYP.DETAIL A 0.25 0.45 PIN 1 ID INDEX AREA SIDE VIEW 0.00 0.05 0.50 0.60

0.15 REF

1.20