LTC3118 18V, 2A Buck-Boost DC/DC Converter with Low Loss Dual Input PowerPath Fea T Descrip T n Integrated High Efficiency Dual Input PowerPath The LTC 3118 is a dual-input, wide voltage range syn- Plus Buck-Boost DC/DC Converter chronous buck-boost DC/DC converter with an intelligent, n integrated, low loss PowerPath control. The unique power Ideal Diode or Priority V Select Modes IN n switch architecture provides efficient operation from either V and V Range: 2.2V to 18V IN1 IN2 n input source to a programmable output voltage above, V Range: 2V to 18V OUT n below or equal to the input. Voltage capability of up to 18V Either V Can Be Above, Below or Equal to V IN OUT n provides flexibility and voltage margin for a wide variety Generates 5V at 2A for V > 6V IN of applications and power sources. n 1.2MHz Low Noise Fixed Frequency Operation n Current Mode Control The LTC3118 uses a low noise, current mode architecture n All Internal N-Channel MOSFETs with a fixed 1.2MHz PWM mode frequency that minimizes n Pin-Selectable PWM or Burst Mode Operation the solution footprint. For high efficiency at light loads, n Accurate, Independent RUN Pin Thresholds automatic Burst Mode operation can be selected consum- n Up to 94% Efficiency ing only 50A of quiescent current in sleep. n V and V Power Good Indicators IN OUT System level features include ideal diode or V priority IN n I of 50A in Sleep, 2A in Shutdown Q modes, V and V power good indicators, accurate RUN IN OUT n 4mm 5mm 24-Lead QFN or 28-Lead TSSOP Packages comparators to program independent UVLO thresholds, and output disconnect in shutdown. Other features include a T 2A shutdown current, short-circuit protection, soft-start, n Systems with Multiple Input Sources current limit and thermal overload protection. n Back Up Power Systems The LTC3118 is offered in thermally enhanced 24-lead n Wall Adapter or Li-Ion(s) Input to 5V OUT 4mm 5mm QFN and 28-lead TSSOP packages. n Battery or Super Capacitor Input for Reserve Power L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Replace Diode-OR Designs with Higher Efficiency, and PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7709976. Flexibility and Performance Typical a T 3.3H Input Switchover Response 0.1F 0.1F V OUT V IN1 V BST1 SW1 SW2 BST2 V IN1 OUT 5V V = 5V, V = 12V, V = 5V AT 1A IN1 IN2 OUT 47nF 22F 400k 5V OUT 100F CM1 AC-COUPLED FB 500mV/DIV 22pF CP1 100k 10nF 1.8nF SW1 CN1 40.2k LTC3118 10V/DIV CN2 VC 10nF CP2 V1GD SEL SELECT V SELECT V V2GD INDICATORS 5V/DIV IN2 IN1 V IN2 V IN2 PGD 22F MODE 3118 TA01b CM2 SEL CONTROL 100s/DIV SIGNALS RUN1 47nF PGND V GND RUN2 CC 3118 TA01a 4.7F 3118fa 1 For more information www.linear.com/LTC3118 ion pplica ions pplica ion uresLTC3118 a T e Maxi Mu M r a T (Note 1) V , V Voltage ....................................... 0.3V to 20V CP1 Voltage ........................ (V 0.3V) to (V + 6V) IN1 IN2 IN1 IN1 V Voltage .............................................. 0.3V to 20V CP2 Voltage ........................ (V 0.3V) to (V + 6V) OUT IN2 IN2 SW1 DC Voltage (Note 4) ...............0.3V to (V + 0.3V) V , CN1, CN2 Voltage ................................... 0.3 to 6V IN1 CC or (V + 0.3V) MODE, SEL, FB, VC Voltage ........................... 0.3 to 6V IN2 SW2 DC Voltage (Note 4).............0.3V to (V + 0.3V) Operating Junction Temperature Range (Notes 2, 3) OUT BST1 Voltage .....................(SW1 0.3V) to (SW1 + 6V) LTC3118E/LTC3118I ........................... 40C to 125C BST2 Voltage ....................(SW2 0.3V) to (SW2 + 6V) LTC3118H .......................................... 40C to 150C RUN1, RUN2 Voltage .................................. 0.3V to 20V LTC3118MP ........................................ 55C to 150C PGD, V1GD, V2GD Voltage ......................... 0.3V to 20V Storage Temperature Range .................. 65C to 150C CM1, CM2 Voltage ....................................... 0.3 to 20V Lead Temperature (Soldering, 10 sec) TSSOP ......300C p c F T TOP VIEW 1 CM2 CM1 28 TOP VIEW 2 27 CN2 CN1 CP1 3 26 PGND 24 23 22 21 20 SEL 1 19 CP2 SEL 4 25 CP2 V 2 18 V IN1 IN2 5 24 V V IN1 IN2 RUN1 3 17 SW1 RUN1 6 23 SW1 25 29 RUN2 4 16 BST1 PGND RUN2 7 22 BST1 PGND V 5 15 BST2 CC 8 BST2 V 21 CC MODE 6 14 SW2 9 20 SW2 MODE GND 7 13 V OUT GND 10 19 V OUT 8 9 10 11 12 11 PGND GND 18 12 17 PGND VC UFD PACKAGE FB 13 16 PGD 24-LEAD (4mm 5mm) PLASTIC QFN V1GD 14 15 V2GD T = 150C, = 3.4C/W, = 43C/W JMAX JC JA EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB FE PACKAGE 28-LEAD PLASTIC TSSOP T = 150C, = 5C/W, = 30C/W JMAX JC JA EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3118EUFD PBF LTC3118EUFD TRPBF 3118 24-Lead (4mm 5mm) Plastic QFN 40C to 125C LTC3118IUFD PBF LTC3118IUFD TRPBF 3118 24-Lead (4mm 5mm) Plastic QFN 40C to 125C LTC3118HUFD PBF LTC3118HUFD TRPBF 3118 24-Lead (4mm 5mm) Plastic QFN 40C to 150C LTC3118MPUFD PBF LTC3118MPUFD TRPBF 3118 24-Lead (4mm 5mm) Plastic QFN 55C to 150C LTC3118EFE PBF LTC3118EFE TRPBF 3118FE 28-Lead Plastic TSSOP 40C to 125C LTC3118IFE PBF LTC3118IFE TRPBF 3118FE 28-Lead Plastic TSSOP 40C to 125C LTC3118HFE PBF LTC3118HFE TRPBF 3118FE 28-Lead Plastic TSSOP 40C to 150C LTC3118MPFE PBF LTC3118MPFE TRPBF 3118FE 28-Lead Plastic TSSOP 55C to 150C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. 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