LTC3115IFE-2

LTC3115-2 40V, 2A Synchronous Buck-Boost DC/DC Converter FEATURES DESCRIPTION Wide VIN Range: 2.7V to 40V nn Wide V OUT Range: 2.7V to 40V nn 0.8A Output Current for V ≥ 3.6V, V IN OUT = 5V nn 2A Output Current in Step-Down Operation for VIN ≥ 6V nn Programmable Frequency: 100kHz to 2MHz nn Synchronizable Up to 2MHz with an External Clock nn Up to 95% Efficiency nn 30µA No-Load Quiescent Current in Burst Mode® Operation nn Ultralow Noise Buck-Boost PWM nn Internal Soft-Start nn 3µA Supply Current in Shutdown nn Programmable Input Undervoltage Lockout nn Small 4mm × 5mm × 0.75mm DFN Package nn Thermally Enhanced 20-Lead TSSOP Package nn AEC-Q100 Qualified for Automotive Applications The LTC®3115-2 is a high voltage monolithic synchronous buck-boost DC/DC converter optimized for applications subject to fast ( 3.6V 2A VIN ≥ 6V 47µF × 2 LTC3115-2 137k 3300pF 1M 33pF 15k FB GND PGND ILOAD = 1A 85 80 75 PVCC VCC RT 47.5k 90 0.1µF EFFICIENCY (%) 0.1µF ILOAD = 0.5A 249k 4.7µF (OPTIONAL) 31152 TA01a 70 VOUT = 5V 2 10 INPUT VOLTAGE (V) 40 31152 TA01b Rev. B Document Feedback For more information www.analog.com 1 LTC3115-2 ABSOLUTE MAXIMUM RATINGS (Note 1) VIN, PVIN, PVOUT......................................... –0.3V to 45V VSW1 DC............................................ –0.3V to (PVIN + 0.3V) Pulsed ( 4V 2A VIN ≥ 6V RFF 1.5k 100k FB PWM/SYNC PVCC VCC RT RT 80.6k GND PGND CIN: AVX22205C106KAT2A CO: GRM43ER61A476KE19L L1: WÜRTH 744 778910 1000pF RBOT 24.9k C1 4.7µF 31152 TA02a Fast (10µs) Line Transient from VIN = 13.8V to 30V INPUT VOLTAGE (10V/DIV) Fast (10µs) Line Transient from VIN = 4V to 13.8V 30V 13.8V INPUT VOLTAGE (5V/DIV) 13.8V 4V VOUT (200mV/DIV) VOUT (100mV/DIV) 500µs/DIV 31152 TA02b 500µs/DIV 0A to 800mA Load Step, VIN = 3.6V LOAD CURRENT (500mA/DIV) 31152 TA02c 0A to 2A Load Step, VIN = 13.8V LOAD CURRENT (1A/DIV) VOUT (200mV/DIV) VOUT (100mV/DIV) 500µs/DIV 31152 TA02d 500µs/DIV 31152 TA02e Rev. B For more information www.analog.com 33 LTC3115-2 TYPICAL APPLICATIONS Wide Input Voltage Range (10V to 40V) 1MHz 24V Supply at 400mA L1 15µH CBST2 0.1µF CBST1 0.1µF BST1 SW1 10V TO 40V UVLO PROGRAMMED TO 10V (1.3V HYSTERESIS) R1 953k SW2 BST2 PVIN VIN CIN 4.7µF RUN PVOUT LTC3115-2 R2 130k VC CO 10µF CFB RFB 4700pF 4.99k FB RT 35.7k GND 31152 TA03a Maximum Load Current vs VIN Efficiency vs VIN 92 2.5 ILOAD = 0.5A 90 EFFICIENCY (%) 2.0 LOAD CURRENT (A) RFF 4.99k C1 4.7µF PGND L1: WÜRTH 744 066 150 1.5 1.0 0.5 0 CFF 47pF RBOT 43.2k PWM/SYNC PVCC VCC RT RTOP 1M 24V 500mA VIN ≥ 12V 400mA VIN ≥ 10V 10 ILOAD = 1A 88 86 84 82 30 20 INPUT VOLTAGE (V) 80 40 10 20 30 INPUT VOLTAGE (V) 40 31152 TA03c 31152 TA03b Power-Up/Down Waveforms, ILOAD = 0.5A VIN (5V/DIV) VOUT (10V/DIV) INDUCTOR CURRENT (2A/DIV) 50ms/DIV 34 31152 TA03d Rev. B For more information www.analog.com LTC3115-2 TYPICAL APPLICATIONS Industrial 12V 1MHz Regulator with 10.6V Input Undervoltage Lockout Threshold L1 10µH CBST2 0.1µF CBST1 0.1µF BST1 SW1 10V TO 40V ENABLED WHEN VIN REACHES 10.6V DISABLED WHEN VIN FALLS BELOW 8.7V SW2 BST2 PVIN VIN CIN 10µF R1 2M PVOUT LTC3115-2 VC RUN R2 255k RT 35.7k CFB RFB 820pF 40.2k FB PWM/SYNC PVCC VCC RT GND 12V 1.4A CO 22µF RTOP 1M CFF 33pF RFF 10k RBOT 90.9k C1 4.7µF PGND 31152 TA04a CIN: MURATA GRM55DR61H106K CO: TDK CKG57NX5R1H226M L1: WÜRTH 744 066 100 PWM Mode Efficiency vs Load Current 0A to 1.5A Load Step, VIN = 24V 100 EFFICIENCY (%) 90 VOUT (500mV/DIV) 80 70 INDUCTOR CURRENT (1A/DIV) 60 VIN = 10.6V VIN = 12V VIN = 24V VIN = 36V 50 40 0.01 0.1 LOAD CURRENT (A) 500µs/DIV 31152 TA04c 1 31152 TA04b 0A to 1.5A Load Step, VIN = 10.6V 0A to 1.5A Load Step, VIN = 40V VOUT (500mV/DIV) VOUT (500mV/DIV) INDUCTOR CURRENT (1A/DIV) INDUCTOR CURRENT (1A/DIV) 500µs/DIV 31152 TA04d 500µs/DIV 31152 TA04e Rev. B For more information www.analog.com 35 LTC3115-2 TYPICAL APPLICATIONS 24V 750kHz Industrial Power Rail from 20V to 40V Input L1 22µH * CBST1 0.1µF BST1 SW1 20V TO 40V OPEN DRAIN OUTPUT R1 500k SW2 BST2 PVIN VIN CIN 10µF *OPTIONAL: INSTALL IN APPLICATIONS SUBJECT TO OUTPUT OVERLOAD OR SHORT-CIRCUIT CONDITIONS CBST2 0.1µF RUN PVOUT 1µF LTC3115-2 ON OFF VC + RFB 25k CO 82µF CFB 3300pF GND PGND CFF 100pF RTOP 1M RFF 51k 100pF FB RT PWM/SYNC PVCC VCC 24V 1.5A RT 47.5k RBOT 43.2k C1 4.7µF 31152 TA05a CO: OS-CON 35SVPF82M WÜRTH: 744 066 220 Regulated Output Voltage from a Time Varying Input Rail Fast (20µs) Input Voltage Transient, VIN = 20V to 35V 35V 40V INPUT VOLTAGE (5V/DIV) VIN (5V/DIV) 20V VOUT (5V/DIV) VOUT (200mV/DIV) 20V 10ms/DIV 31152 TA05b 500µs/DIV 31152 TA05e Efficiency vs Load Current 0A to 1.5A Load Step, VIN = 20V 100 LOAD CURRENT (1A/DIV) 90 EFFICIENCY (%) 80 VOUT (500mV/DIV) INDUCTOR CURRENT (2A/DIV) 70 60 50 40 500µs/DIV 31152 TA05c VIN = 20V VIN = 24V VIN = 36V 30 20 0.01 0.10 LOAD CURRENT (A) 1 31152 TA05d 36 Rev. B For more information www.analog.com LTC3115-2 TYPICAL APPLICATIONS USB, FireWire, Automotive and Unregulated Wall Adapter to Regulated 5V (750kHz) USB 4.1V TO 5.5V FireWire 8V TO 36V AUTOMOTIVE 3.6V TO 40V WALL ADAPTER 4V TO 40V D1 D2 L1 10µH CBST1 0.1µF D3 D4 CBST2 0.1µF BST1 SW1 + 2.2µF 100µF ELECT SW2 BST2 PVIN VIN PVOUT LTC3115-2 PWM/SYNC BURST PWM VC RUN OFF ON CO 47µF ×2 CFB RFB 4700pF 100k FB RT 47.5k PVCC VCC RT GND PGND 5V 600mA RTOP 1M CFF 47pF RFF 51k RBOT 249k C1 4.7µF 31152 TA06a CIN: MURATA GRM55DR61H106K CO: GRM43ER60J476 D1-D4: B360A-13-F L1: COILCRAFT LPS6225 Hot Plug on Firewire Input from VIN = 4V to 24V VIN at IC (10V/DIV) Soft-Start Waveform, VIN = 24V, ILOAD = 0.5A VRUN (5V/DIV) ~24V VCC (5V/DIV) ~4V VOUT (2V/DIV) VOUT (200mV/DIV) INDUCTOR CURRENT (500mA/DIV) 500µs/DIV 31152 TA06e Efficiency vs Load Current, from Automotive Input 2ms/DIV 31152 TA06c Output Voltage Transient Response, 600mA Load Step, Powered from Automotive Input 100 90 EFFICIENCY (%) 80 70 60 VOUT (200mV/DIV) VIN = 36V VOUT (200mV/DIV) VIN = 12V VOUT (200mV/DIV) VIN = 3.6V 50 VIN = 3.6V VIN = 5V VIN = 12V VIN = 24V VIN = 36V 40 30 20 0.01 0.1 LOAD CURRENT (A) 1ms/DIV 31152 TA06d 1 31152 TA06b Rev. B For more information www.analog.com 37 LTC3115-2 TYPICAL APPLICATIONS 1.5MHz, 12V Regulator with 8V to 40V Input Voltage Range L1 4.7µH CBST2 0.1µF CBST1 0.1µF BST1 SW1 8V TO 40V CI 4.7µF SW2 BST2 PVIN VIN PVOUT RUN LTC3115-2 PWM/SYNC BURST PWM RT 23.7k VC CO 22µF CFB RFB 1000pF 15k FB RT PVCC VCC GND PGND RTOP 1M 12V AT 500mA 1A VIN > 10V CFF 33pF RFF 15k RBOT 90.9k C1 4.7µF 31152 TA07a CO: TDK C3225X7R1C226k L1: COILCRAFT MOS6020-472MX Load Step Transient Response, 0mA to 500mA, VIN = 8V Load Step Transient Response, 0mA to 500mA, VIN = 24V LOAD CURRENT (500mA/DIV) LOAD CURRENT (500mA/DIV) VOUT (500mV/DIV) VOUT (500mV/DIV) INDUCTOR CURRENT (1A/DIV) INDUCTOR CURRENT (1A/DIV) 200µs/DIV 31152 TA07b 200µs/DIV Efficiency vs Load Current, PWM Mode Efficiency vs Load Current, Burst Mode Operation 100 90 90 80 70 EFFICIENCY (%) EFFICIENCY (%) 80 70 60 50 40 VIN = 6V VIN = 10V VIN = 24V VIN = 36V 30 20 0.01 0.1 LOAD CURRENT (A) 1 31152 TA07d 38 31152 TA07c 60 50 40 VIN = 6V VIN = 10V VIN = 24V VIN = 36V 30 20 0.1 1 10 LOAD CURRENT (mA) 100 31152 TA07e Rev. B For more information www.analog.com LTC3115-2 PACKAGE DESCRIPTION DHD Package 16-Lead Plastic DFN (5mm × 4mm) (Reference LTC DWG # 05-08-1707 Rev A) 0.70 ±0.05 4.50 ±0.05 3.10 ±0.05 2.44 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 4.34 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 5.00 ±0.10 (2 SIDES) 9 4.00 ±0.10 (2 SIDES) R = 0.115 TYP 0.40 ±0.10 16 2.44 ±0.10 (2 SIDES) PIN 1 TOP MARK (SEE NOTE 6) PIN 1 NOTCH 8 0.200 REF 1 0.25 ±0.05 0.50 BSC 0.75 ±0.05 0.00 – 0.05 (DHD16) DFN REV A 1113 4.34 ±0.10 (2 SIDES) BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJGD-2) IN JEDEC PACKAGE OUTLINE MO-229 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Rev. B For more information www.analog.com 39 LTC3115-2 PACKAGE DESCRIPTION FE Package 20-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1663 Rev L) Exposed Pad Variation CA 6.07 (.239) 6.40 – 6.60* (.252 – .260) 4.95 (.195) 4.95 (.195) DETAIL A 1.98 (.078) REF 20 1918 17 16 15 14 13 12 11 6.60 ±0.10 4.50 ±0.10 DETAIL A 2.74 (.108) 6.40 2.74 (.252) (.108) BSC SEE NOTE 4 0.45 ±0.05 1.05 ±0.10 0.65 BSC 1 2 3 4 5 6 7 8 9 10 6.07 (.239) RECOMMENDED SOLDER PAD LAYOUT 4.30 – 4.50* (.169 – .177) 0.09 – 0.20 (.0035 – .0079) 0.25 REF 0.50 – 0.75 (.020 – .030) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS MILLIMETERS 2. DIMENSIONS ARE IN (INCHES) 3. DRAWING NOT TO SCALE 40 0.56 (.022) REF DETAIL A IS THE PART OF THE LEAD FRAME FEATURE FOR REFERENCE ONLY NO MEASUREMENT PURPOSE 1.20 (.047) MAX 0° – 8° 0.65 (.0256) BSC 0.195 – 0.30 (.0077 – .0118) TYP 0.05 – 0.15 (.002 – .006) FE20 (CA) TSSOP REV L 0117 4. RECOMMENDED MINIMUM PCB METAL SIZE FOR EXPOSED PAD ATTACHMENT *DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.150mm (.006") PER SIDE Rev. B For more information www.analog.com LTC3115-2 REVISION HISTORY REV DATE DESCRIPTION A 5/15 Clarified GBUCK formula Clarified Loop Compensation Example Clarified PCB Layout Considerations C 6/19 PAGE NUMBER 22 26 30, 31, 32 Added LTC3114-1 to Related Parts list 42 Added AEC-Q100 automotive models 1,3 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license For is granted implication or otherwise under any patent or patent rights of Analog Devices. more by information www.analog.com 41 LTC3115-2 TYPICAL APPLICATION 2MHz Automotive 5V Regulator with Cold Crank Capability L1 3.3µH CBST2 0.1µF CBST1 0.1µF BST1 SW1 AUTOMOTIVE 4V TO 40V SW2 BST2 PVIN VIN CIN 4.7µF PVOUT LTC3115-2 PWM/SYNC BURST PWM VC RUN OFF ON CO 47µF × 2 CFB RFB 4700pF 24.3k 5V 800mA RTOP 100k CFF 100pF RFF 2k 100k FB CO: MURATA GRM43ER61A476 L1: COILCRAFT LPS5030-332ML RT 17.8k 1000pF RBOT 24.9k PVCC RT GND VCC PGND C1 4.7µF 31152 TA08a Cold Crank Line Transient with 800mA Load Fast (10µs) Load Dump Line Transient, VIN = 13.8V to 36V 36V 12V VIN (2V/DIV) Fast (10µs) Cold Crank Line Transient, VIN = 13.8V to 4V INPUT VOLTAGE (10V/DIV) 15ms FALL TIME 13.8V INPUT VOLTAGE (5V/DIV) 13.8V 4V 6V 4.5V VOUT (200mV/DIV) INDUCTOR CURRENT (1A/DIV) VOUT (200mV/DIV) VOUT (200mV/DIV) 200ms/DIV 31152 TA08b 200µs/DIV 31152 TA08c 200µs/DIV 31152 TA08d RELATED PARTS PART NUMBER LTC3115-1 DESCRIPTION 2A (IOUT), 40V Synchronous Buck-Boost Converter LTC3114-1 1A (IOUT), 40V Synchronous Buck-Boost DC/DC Converter LTC3112 2.5A (IOUT), 15V Synchronous Buck-Boost DC/DC Converter LTC3113 3A (IOUT), 2MHz Synchronous Buck-Boost DC/DC Converter LTC3127 1A (IOUT), 1.2MHz Buck-Boost DC/DC Converter with Programmable Input Current Limit High Efficiency, Synchronous, 4-Switch Buck-Boost Controller LTC3789 LTC3785 LTC3534 42 ≤10A (IOUT), High Efficiency, 1MHz Synchronous, No RSENSE™ Buck-Boost Controller 7V, 500mA (IOUT), 1MHz Synchronous Buck-Boost DC/DC Converter COMMENTS VIN: 2.7V to 40V, VOUT : 2.7V to 40V, IQ = 30µA, ISD < 3µA, DFN and TSSOP Packages VIN = 2.2V to 40V, VOUT = 2.7V to 40V, IQ = 30µA, ISD < 3µA, DFN and TSSOP Packages VIN: 2.7V to 15V, VOUT : 2.5V to 14V, IQ = 40µA, ISD < 1µA, DFN and TSSOP Packages VIN: 1.8V to 5.5V, VOUT : 1.8V to 5.25V, IQ = 30µA, ISD < 1µA, DFN and TSSOP Packages 96% Efficiency VIN: 1.8V to 5.5V, VOUT : 1.8V to 5.25V, IQ = 35µA, ISD < 4µA, MSOP and DFN Packages VIN: 4V to 38V, VOUT : 0.8V to 38V, IQ = 3mA, ISD < 60µA, SSOP-28, QFN-28 Packages VIN: 2.7V to 10V, VOUT : 2.7V to 10V, IQ = 86µA, ISD < 15µA, QFN Package 94% Efficiency, VIN: 2.4V to 7V, VOUT : 1.8V to 7V, IQ = 25µA, ISD < 1µA, DFN and GN Packages Rev. B 06/19 www.analog.com For more information www.analog.com  ANALOG DEVICES, INC. 2013-2019