15V/250mA Nanopower Buck DC/DC with Programmable Peak Input Current Features: Input Voltage Range: 2.5V to 15V Output Current: Up to 250mA IVIN = 65nA (In Regulation, No Load) Output Voltage Range: 1.2V to 5V 16 Fixed Output Voltages Programmed via4 PinStrapped Inputs 4 Peak VIN Currents Programmed via 2 Pin-Strapped Inputs (10mA/30mA/100mA/300mA) Low IQ Dropout Mode Power Good (PGOOD) Output 12-Lead 2mm × 2mm LQFN Package

Primary Battery SOH Monitor with Precision Coulomb Counter Features: Battery Input Voltage Range: 1.8V to 5.5V 100nA Quiescent Current 8 Primary Battery Peak Input Current Limits: 5mA/10mA/15mA/20mA/25mA/50mA/75mA/100mA SOH Monitor for Primary Battery Integrated Coulomb Counter (Q) Additional Monitors for Battery Voltage (V), Battery Impedance (Z), and Temperature (T) Primary Battery Current (BAT_IN) or Load Current (BAT_OUT) is Counted Integrated ±10mA Supercapacitor Balancer Programmable Coulomb Counter Prescaler for Wide Range of Battery Sizes Programmable Discharge Alarm Threshold with Interrupt Output I2C Interface Tiny 12-Lead 2mm × 2mm LFCSP and 16-Ball 1.64mm × 1.64mm WLCSP Packages

High Current Supercapacitor Backup Controller and System Monitor Features: High Efficiency Synchronous Step-Down CC/CV Charging of One to Four Series Supercapacitors Step-Up Mode in Backup Provides Greater Utilization of Stored Energy in Supercapacitors 14-Bit ADC for Monitoring System Voltages/Currents, Capacitance and ESR Active Overvoltage Protection Shunts Internal Active Balancers—No Balance Resistors VIN: 4.5V to 35V, VCAP(n): Up to 5V per Capacitor, Charge/Backup Current: 10+A Programmable Input Current Limit Prioritizes System Load Over Capacitor Charge Current Dual Ideal Diode PowerPath™ Controller All N-FET Charger Controller and PowerPath Controller Compact 38-Lead 5mm × 7mm QFN Package AEC-Q100 Qualified for Automotive Applications

High Current Supercapacitor Backup Controller and System Monitor Features: High Efficiency Synchronous Step-Down CC/CV Charging of One to Four Series Supercapacitors Step-Up Mode in Backup Provides Greater Utilization of Stored Energy in Supercapacitors 14-Bit ADC for Monitoring System Voltages/Currents, Capacitance and ESR Active Overvoltage Protection Shunts Internal Active Balancers—No Balance Resistors VIN: 4.5V to 35V, VCAP(n): Up to 5V per Capacitor, Charge/Backup Current: 10+A Programmable Input Current Limit Prioritizes System Load Over Capacitor Charge Current Dual Ideal Diode PowerPath™ Controller All N-FET Charger Controller and PowerPath Controller Compact 38-Lead 5mm × 7mm QFN Package AEC-Q100 Qualified for Automotive Applications

20V 1A Buck DC/DC with Integrated SCAP Charger and Backup Regulator Features:VIN Voltage Range: 3V to 20VVOUT Voltage Range: 2.7V to 5V1A Current Mode Buck Main Regulator5A Boost Backup Regulator Powered from Single SupercapacitorBoost Regulator Operates Down to 0.5V for Maximum Utilization of Supercapacitor EnergyProgrammable Supercapacitor Charge Current to 1A with Overvoltage ProtectionCharger Supports Single Cell CC/CV Battery ChargingProgrammable VIN Current LimitProgrammable Boost Current LimitVIN Power Fail IndicatorVCAP Power Good IndicatorVOUT Power On Reset OutputCompact 20-Lead 4mm × 4mm QFN Package

4-Channel 8A Configurable Buck DC/DCs Features: 8 × 1A Power Stages Configurable as 2, 3, or 4 Output Channels 8 Unique Output Configurations (1A to 4A Per Channel) Independent VIN Supplies for Each DC/DC (2.25V to 5.5V) Low Total No Load Supply Current: Zero Current In Shutdown (All Channels Off) 63μA One Channel Active in Burst Mode® Operation 18μA Per Additional Channel Precision Enable Pin Thresholds for Autonomous Sequencing 1MHz to 3MHz RT Programmable Frequency (2MHz Default) or PLL Synchronization Temp Monitor Indicates Die Temperature PGOODALL Pin Indicates All Enabled Bucks Are in Regulation 32-Lead 5mm × 5mm QFN Package

4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset Features: 8 × 1A Buck Power Stages Configurable as 2, 3 or 4 Output Channels 8 Unique Output Configurations (1A to 4A Per Channel) Independent VIN Supplies for Each DC/DC (2.25V to 5.5V) Low Total No Load Supply Current: 15μA In Shutdown (All Channels Off) 68μA One Channel Active in Burst Mode® Operation 18μA Per Additional Channel Precision Enable Pin Thresholds for Autonomous Sequencing 1MHz to 3MHz RT Programmable Frequency (2MHz Default) or PLL Synchronization Temp Monitor Indicates Die Temperature CT Programmed Watchdog Timer Independent RST Pins Indicate Buck in Regulation Thermally Enhanced 38-Lead 5mm × 7mm QFN and TSSOP Packages

60V Low IQ Buck Controller Plus 4-Channel 8A Configurable Buck DC/DCs Features: HV Buck Controller: VIN = 4.5V to 60V, VOUT = 5V/3.3V LV Buck Regulators: VINA-H = 2.25V to 5.5V, VOUT1-4 ≥ 0.8V 8×1A LV Buck Integrated Power Stages, Configurable as 2, 3 or 4 Output Channels 8 Unique Output Configurations (1A to 4A Per Channel) Low Total No-Load Input Supply Current (IQ) 15µA HV Controller Only (5VOUT) 23μA HV Controller Only (3.3VOUT) 33μA HV Controller (3.3VOUT) Plus One LV Regulator 9μA Per Additional LV Regulator Channel 1MHz to 3MHz Operation (HV Runs at 1/6 Frequency) Programmable or Synchronizable to External Clock Programmable Watchdog and Power-On Reset Delay IC Die Temperature Monitor Output Thermally Enhanced 48-Pin 7mm × 7mm QFN Package

High Accuracy 8-Channel Parallelable 1A Buck DC/DCs Features: 8-Channel 1A Independent Step-Down DC/DCs Master-Slave Configurable for Up to 4A of Output Current with a Single Inductor Independent VIN Supplies for Each DC/DC (2.25V to 5.5V) All DC/DCs Have 0.8V to VIN Output Range ±1% VFB Accuracy, for Buck 1 (1A to 4A) ±1% PGOOD Accuracy Precision Enable Pin Thresholds for Autonomous Sequencing 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default) Die Temperature Monitor Output Thermally Enhanced 38-Lead 5mm × 7mm QFN and TSSOP Packages Pin-Compatible with LTC3374 AEC-Q100 Qualified for Automotive Applications

8-Channel Parallelable 1A Buck DC/DCs Features: 8-Channel Independent Step-Down DC/DCs Master-Slave Configurable for Up to 4A per Output Rail with a Single Inductor Independent VIN Supplies for Each DC/DC (2.25V to 5.5V) All DC/DCs Have 0.8V to VIN Output Range Precision Enable Pin Thresholds for Autonomous Sequencing 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default) Die Temperature Monitor Output Thermally Enhanced 38-Lead QFN (5mm × 7mm) and TSSOP Packages

8-Channel Programmable, Parallelable 1A Buck DC/DCs Features: 8-Channel Independent Step-Down DC/DCs Master-Slave Configurable for Up to 4A Per Output Channel with a Single Inductor Independent VIN Supply for Each DC/DC (2.25V to 5.5V) All DC/DCs Have 0.425V to VIN Output Voltage Range Precision Enable Pin Thresholds for Autonomous Sequencing (or I2C Control) 1MHz to 3MHz Programmable/Synchronizable Oscillator Frequency (2MHz Default) I2C Selectable Phasing (90° Steps) Per Channel Programmable Power-On Reset/Watch Dog/Pushbutton Timing Die Temperature Monitor Output 48-Lead (7mm × 7mm) QFN Package

20V High Efficiency Nanopower Step-Down Regulator Features: 720nA Input IQ in Regulation (No Load), VIN = 4V 820nA Input IQ in Regulation (No Load), VIN = 20V 400nA Input IQ in UVLO 2.7V to 20V Input Operating Range Up to 50mA of Output Current Pin Selectable Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) High Efficiency Hysteretic Synchronous DC/DC Conversion Standby Mode Disables Buck Switching Available in 10-Lead MSE and 3mm × 3mm DFN Packages

20V High Efficiency Nanopower Step-Down Regulator Features: 720nA Input IQ in Regulation (No Load), VIN = 4V 820nA Input IQ in Regulation (No Load), VIN = 20V 400nA Input IQ in UVLO 2.7V to 20V Input Operating Range Up to 50mA of Output Current Pin Selectable Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) High Efficiency Hysteretic Synchronous DC/DC Conversion Standby Mode Disables Buck Switching Available in 10-Lead MSE and 3mm × 3mm DFN Packages

600mA, 1.2MHz Micropower Synchronous Boost Converters in ThinSOT Features: Up to 92% Efficiency Generates 3.3V at 100mA from a Single AA Cell Low Start-Up Voltage: 0.85V 1.2MHz Fixed Frequency Switching Internal Synchronous Rectifier 2.5V to 5V Output Range Automatic Burst Mode® Operation (LTC3400) Continuous Switching at Light Loads (LTC3400B) Logic Controlled Shutdown (<1µA) Antiringing Control Minimizes EMI Tiny External Components Low Profile (1mm) SOT-23 Package

600mA, 1.2MHz Micropower Synchronous Boost Converters in ThinSOT Features: Up to 92% Efficiency Generates 3.3V at 100mA from a Single AA Cell Low Start-Up Voltage: 0.85V 1.2MHz Fixed Frequency Switching Internal Synchronous Rectifier 2.5V to 5V Output Range Automatic Burst Mode® Operation (LTC3400) Continuous Switching at Light Loads (LTC3400B) Logic Controlled Shutdown (<1µA) Antiringing Control Minimizes EMI Tiny External Components Low Profile (1mm) SOT-23 Package

600mA, 1.2MHz Micropower Synchronous Boost Converters in ThinSOT Features: Up to 92% Efficiency Generates 3.3V at 100mA from a Single AA Cell Low Start-Up Voltage: 0.85V 1.2MHz Fixed Frequency Switching Internal Synchronous Rectifier 2.5V to 5V Output Range Automatic Burst Mode® Operation (LTC3400) Continuous Switching at Light Loads (LTC3400B) Logic Controlled Shutdown (<1µA) Antiringing Control Minimizes EMI Tiny External Components Low Profile (1mm) SOT-23 Package

1.5V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT Features: High Efficiency: Up to 93% Very Low Quiescent Current: Only 20µA During Operation 300mA Output Current at VIN = 3V 2.5V to 5.5V Input Voltage Range 1.5MHz Constant Frequency Operation No Schottky Diode Required Low Dropout Operation: 100% Duty Cycle Stable with Ceramic Capacitors Shutdown Mode Draws <1µA Supply Current ±3% Output Voltage Accuracy Current Mode Operation for Excellent Line and Load Transient Response Overtemperature Protected Low Profile (1mm) ThinSOT™ Package

1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT Features: High Efficiency: Up to 96% 600mA Output Current 2.5V to 5.5V Input Voltage Range 1.5MHz Constant Frequency Operation No Schottky Diode Required Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 200µA ±2% 0.6V Reference Shutdown Mode Draws <1µA Supply Current Internal Soft-Start Limits Inrush Current Current Mode Operation for Excellent Line and Load Transient Response Overtemperature Protected Low Profile (1mm) ThinSOT™ Package

2.25MHz, 600mA Synchronous Step-Down Regulator in ThinSOT Features: High Efficiency: Up to 96% 600mA Output Current at VIN = 3V 2.5V to 5.5V Input Voltage Range 2.25MHz Constant Frequency Operation No Schottky Diode Required Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 350µA 0.6V Reference Allows Low Output Voltages Shutdown Mode Draws < 1µA Supply Current Current Mode Operation for Excellent Line and Load Transient Response Overtemperature Protected Low Profile (1mm) SOT-23 Package

2.25MHz, 600mA Synchronous Step-Down Regulator in ThinSOT Features: High Efficiency: Up to 96% 600mA Output Current at VIN = 3V 2.5V to 5.5V Input Voltage Range 2.25MHz Constant Frequency Operation No Schottky Diode Required Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 350µA 0.6V Reference Allows Low Output Voltages Shutdown Mode Draws < 1µA Supply Current Current Mode Operation for Excellent Line and Load Transient Response Overtemperature Protected Low Profile (1mm) SOT-23 Package