High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter Features: 2.7V to 5.5V Input Voltage Range No Inductors Li-Ion (3.6V) to 1.5V with 81% Efficiency Low Noise Constant Frequency Operation Output Voltages: 1.5V ±4%, 1.2V ±4% Output Current: 250mA Shutdown Disconnects Load from VIN Low Operating Current: IQ = 35µA Low Shutdown Current: ISD <1µA Oscillator Frequency = 1.5MHz Soft-Start Limits Inrush Current at Turn-On Short-Circuit and Overtemperature Protected Low Profile (1mm) ThinSOT Package

500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converters Features: Up to 500mA Output Current No Inductors 2.7V to 5.5V Input Voltage Range 2x Efficiency Improvement Over LDOs 2-Phase, Spread Spectrum Operation for Low Input and Output Noise Shutdown Disconnects Load from VIN Adjustable Output Voltage Range: 0.9V to 1.6V Fixed Output Voltages: 1.2V, 1.5V Super Burst, Burst and Burst Defeat Operating Modes Low Operating Current: IIN = 35µA (Burst Mode® Operation) Super Burst Operating Current: IIN = 10µA Low Shutdown Current: IIN = 0.01µA Typ Soft-Start Limits Inrush Current at Turn-On Short-Circuit and Overtemperature Protected Available in a Thermally Enhanced 10-Pin MSOP Package

500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converters Features: Up to 500mA Output Current No Inductors 2.7V to 5.5V Input Voltage Range 2x Efficiency Improvement Over LDOs 2-Phase, Spread Spectrum Operation for Low Input and Output Noise Shutdown Disconnects Load from VIN Adjustable Output Voltage Range: 0.9V to 1.6V Fixed Output Voltages: 1.2V, 1.5V Super Burst, Burst and Burst Defeat Operating Modes Low Operating Current: IIN = 35µA (Burst Mode® Operation) Super Burst Operating Current: IIN = 10µA Low Shutdown Current: IIN = 0.01µA Typ Soft-Start Limits Inrush Current at Turn-On Short-Circuit and Overtemperature Protected Available in a Thermally Enhanced 10-Pin MSOP Package

Wide VIN Range Fault Protected 50mA Step-Down Charge Pump Features: Input Voltage Range: 4V to 48V Adjustable Regulated Output: 2.4V to 12.5V Output Current: 50mA Maximum 16μA Quiescent Current in Regulation at No Load Input Fault Protection from –52V to 60V Multimode Charge Pump (2:1, 1:1) with Automatic Mode Switching Maintains Regulation Over Wide VIN Range Input Voltage Shunt Mode for Current-Fed Applications Power Good Output Overtemperature and Short-Circuit Protection Operating Junction Temperature: 150°C Maximum Thermally Enhanced 10-Lead MSOP and 10-Lead (3mm × 3mm) DFN packages

Wide VIN Range Fault Protected 50mA Step-Down Charge Pump Features: Input Voltage Range: 4V to 48V Adjustable Regulated Output: 2.4V to 12.5V Output Current: 50mA Maximum 16μA Quiescent Current in Regulation at No Load Input Fault Protection from –52V to 60V Multimode Charge Pump (2:1, 1:1) with Automatic Mode Switching Maintains Regulation Over Wide VIN Range Input Voltage Shunt Mode for Current-Fed Applications Power Good Output Overtemperature and Short-Circuit Protection Operating Junction Temperature: 150°C Maximum Thermally Enhanced 10-Lead MSOP and 10-Lead (3mm × 3mm) DFN packages

Wide VIN Range Dual Output 350mA Step-Down Charge Pump with Watchdog Timer Features:Input Voltage Range: 5.5V to 38VIndependently Enabled 5V and 3.3V Fixed Outputs5V Output: 100mA Max3.3V LDO Output: 250mA MaxMultimode Step-Down Charge Pump (2:1, 1:1) with Automatic Mode SwitchingLow Quiescent Current20μA with Both Outputs Regulating (No Load)0.5μA in ShutdownEngineered for Diagnostic Coverage in ISO26262 Systems1.1V Reference Output for System DiagnosticsPower-On Reset and Watchdog Controller with Adjustable TimingOvercurrent Fault Protection on Each OutputOvertemperature Protection150°C Max Operating Junction TemperatureThermally Enhanced 16-Lead MSOP Package

Wide VIN Range Dual Output 350mA Step-Down Charge Pump with Watchdog Timer Features:Input Voltage Range: 5.5V to 38VIndependently Enabled 5V and 3.3V Fixed Outputs5V Output: 100mA Max3.3V LDO Output: 250mA MaxMultimode Step-Down Charge Pump (2:1, 1:1) with Automatic Mode SwitchingLow Quiescent Current20μA with Both Outputs Regulating (No Load)0.5μA in ShutdownEngineered for Diagnostic Coverage in ISO26262 Systems1.1V Reference Output for System DiagnosticsPower-On Reset and Watchdog Controller with Adjustable TimingOvercurrent Fault Protection on Each OutputOvertemperature Protection150°C Max Operating Junction TemperatureThermally Enhanced 16-Lead MSOP Package

High Voltage, Low Quiescent Current Inverting Charge Pump Features:4.5V to 32V VIN RangeInverting Charge Pump Generates –VIN60μA Quiescent Current in Burst Mode® OperationCharge Pump Output Current Up to 100mA50kHz to 500kHz Programmable Oscillator FrequencyShort-Circuit/Thermal ProtectionLow Profile Thermally Enhanced 12-Pin MSOP Package

Low Noise Dual Supply with Boost and Inverting Charge Pumps Features:Boost Charge Pump Generates 2 • VIN_P (VIN_P Range: 4.5V to 16V)Inverting Charge Pump Generates –VIN_N (VIN_N Range: 4.5V to 32V)Low Noise Positive LDO Post Regulator Up to 50mALow Noise Negative LDO Post Regulator Up to 50mA135μA Quiescent Current in Burst Mode® Operation with Both LDO Regulators On50kHz to 500kHz Programmable Oscillator FrequencyStable with Ceramic CapacitorsShort-Circuit/Thermal ProtectionLow Profile 3mm × 5mm 18-Lead DFN and Thermally Enhanced 20-Lead TSSOP Packages

High Voltage Boost Charge Pump Features: Wide Input Range: 4.5V to 55V VIN/VAUX Reverse Input Protection to –55V Split Input Supplies for High Efficiency Boost Ratios IOUT Up to 50mA 15µA VIN Quiescent Current 1µA VAUX Quiescent Current Stable with Ceramic Capacitors Short-Circuit/Thermal Protection Thermally Enhanced 10-Pin MSOP Package

High Voltage Boost Charge Pump Features: Wide Input Range: 4.5V to 55V VIN/VAUX Reverse Input Protection to –55V Split Input Supplies for High Efficiency Boost Ratios IOUT Up to 50mA 15µA VIN Quiescent Current 1µA VAUX Quiescent Current Stable with Ceramic Capacitors Short-Circuit/Thermal Protection Thermally Enhanced 10-Pin MSOP Package

High Voltage Boost Charge Pump Features: Wide Input Range: 4.5V to 55V VIN/VAUX Reverse Input Protection to –55V Split Input Supplies for High Efficiency Boost Ratios IOUT Up to 50mA 15µA VIN Quiescent Current 1µA VAUX Quiescent Current Stable with Ceramic Capacitors Short-Circuit/Thermal Protection Thermally Enhanced 10-Pin MSOP Package

High Efficiency Bidirectional Multicell Battery Balancer Features: Bidirectional Synchronous Flyback Balancing of Up to 6 Li-Ion or LiFePO4 Cells in Series Up to 10A Balancing Current (Set by Externals) Integrates Seamlessly with the LTC680x Family of Multicell Battery Stack Monitors Bidirectional Architecture Minimizes Balancing Time and Power Dissipation Up to 92% Charge Transfer Efficiency Stackable Architecture Enables >1000V Systems Uses Simple 2-Winding Transformers 1MHz Daisy-Chainable Serial Interface with 4-Bit CRC Packet Error Checking High Noise Margin Serial Communication Numerous Fault Protection Features 48-Lead Exposed Pad QFN and LQFP Packages AEC-Q100 Qualified for Automotive Applications

High Efficiency Bidirectional Multicell Battery Balancer Features: Bidirectional Synchronous Flyback Balancing of Up to 6 Li-Ion or LiFePO4 Cells in Series Up to 10A Balancing Current (Set by Externals) Integrates Seamlessly with the LTC680x Family of Multicell Battery Stack Monitors Bidirectional Architecture Minimizes Balancing Time and Power Dissipation Up to 92% Charge Transfer Efficiency Stackable Architecture Enables >1000V Systems Uses Simple 2-Winding Transformers 1MHz Daisy-Chainable Serial Interface with 4-Bit CRC Packet Error Checking High Noise Margin Serial Communication Numerous Fault Protection Features 48-Lead Exposed Pad QFN and LQFP Packages AEC-Q100 Qualified for Automotive Applications

Addressable High Efficiency Bidirectional Multicell Battery Balancer Features: Bidirectional Synchronous Flyback Balancing of Up to 6 Li-Ion or LiFePO4 Cells in Series Up to 10A Balancing Current (Set by Externals) Integrates Seamlessly with the LTC680x Family of Multicell Battery Stack Monitors Bidirectional Architecture Minimizes Balancing Time and Power Dissipation Up to 92% Charge Transfer Efficiency Stackable Architecture Enables >800V Systems Uses Simple 2-Winding Transformers 1MHz Serial Interface with 4-Bit CRC Packet Error Checking Individually Addressable with 5-Bit Address Numerous Fault Protection Features 48-Lead Exposed Pad QFN and LQFP Packages AEC-Q100 Qualified for Automotive Application

Lead Acid Battery Balancer Features: Single IC Balances Up to Four 12V Lead-Acid Batteries in Series All NFET Design Stackable to Balance Larger Series Battery Packs Standalone Balancing Operation: Requires No External μP or Additional Control Circuitry Balancing Current Limited by External PTC Thermistor Continuous Mode and Timer Mode Programmable UV and OV Fault Thresholds Programmable Termination Time and Termination Voltage Thermally Enhanced 38-Lead TSSOP Package Click here to read "Life Extension Through Charge Equalization of Lead-Acid Batteries" on IEEE Xplore

5V, 3A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN Features: Pin Compatible with LTC3308(4A) and LTC3309(6A) High Efficiency: 8mΩ NMOS, 31mΩ PMOS Programmable Frequency 1MHz to 3MHz Tiny Inductor and Capacitors Peak Current Mode Control 22ns Minimum On-Time Wide Bandwidth, Fast Transient Response Silent Switcher® Architecture Ultralow EMI Emissions Low Ripple Burst Mode® Operation with IQ of 40µA Safely Tolerates Inductor Saturation in Overload VIN Range: 2.25V to 5.5V VOUT Range: 0.5V to VIN VOUT Accuracy: ±1% Over Temperature Range Precision 400mV Enable Threshold, 1µA in Shutdown Power Good, Internal Compensation and Soft Start Thermally Enhanced 2mm × 2mm LQFN Package AEC-Q100 Qualified for Automotive Applications

5V, 3A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN Features: Pin Compatible with LTC3308(4A) and LTC3309(6A) High Efficiency: 8mΩ NMOS, 31mΩ PMOS Programmable Frequency 1MHz to 3MHz Tiny Inductor and Capacitors Peak Current Mode Control 22ns Minimum On-Time Wide Bandwidth, Fast Transient Response Silent Switcher® Architecture Ultralow EMI Emissions Low Ripple Burst Mode® Operation with IQ of 40µA Safely Tolerates Inductor Saturation in Overload VIN Range: 2.25V to 5.5V VOUT Range: 0.5V to VIN VOUT Accuracy: ±1% Over Temperature Range Precision 400mV Enable Threshold, 1µA in Shutdown Power Good, Internal Compensation and Soft Start Thermally Enhanced 2mm × 2mm LQFN Package AEC-Q100 Qualified for Automotive Applications

5V, 3A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN Features: Pin Compatible with LTC3308(4A) and LTC3309(6A) High Efficiency: 8mΩ NMOS, 31mΩ PMOS Programmable Frequency 1MHz to 3MHz Tiny Inductor and Capacitors Peak Current Mode Control 22ns Minimum On-Time Wide Bandwidth, Fast Transient Response Silent Switcher® Architecture Ultralow EMI Emissions Low Ripple Burst Mode® Operation with IQ of 40µA Safely Tolerates Inductor Saturation in Overload VIN Range: 2.25V to 5.5V VOUT Range: 0.5V to VIN VOUT Accuracy: ±1% Over Temperature Range Precision 400mV Enable Threshold, 1µA in Shutdown Power Good, Internal Compensation and Soft Start Thermally Enhanced 2mm × 2mm LQFN Package AEC-Q100 Qualified for Automotive Applications

5V, 3A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN Features: Pin Compatible with LTC3308(4A) and LTC3309(6A) High Efficiency: 8mΩ NMOS, 31mΩ PMOS Programmable Frequency 1MHz to 3MHz Tiny Inductor and Capacitors Peak Current Mode Control 22ns Minimum On-Time Wide Bandwidth, Fast Transient Response Silent Switcher® Architecture Ultralow EMI Emissions Low Ripple Burst Mode® Operation with IQ of 40µA Safely Tolerates Inductor Saturation in Overload VIN Range: 2.25V to 5.5V VOUT Range: 0.5V to VIN VOUT Accuracy: ±1% Over Temperature Range Precision 400mV Enable Threshold, 1µA in Shutdown Power Good, Internal Compensation and Soft Start Thermally Enhanced 2mm × 2mm LQFN Package AEC-Q100 Qualified for Automotive Applications