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

Dual 5V, 2A Synchronous Step-Down DC/DCs in Tiny LQFN and WLCSP Features: Dual Outputs Each with 2A Output Current High Efficiency: 19mΩ NMOS and 75mΩ PMOS Wide Bandwidth, Fast Transient Response Switching Frequency Synchronizable Up to 3MHz VIN Range: 2.25V to 5.5V VOUT Range: 0.5V to VIN VOUT Accuracy: ±1% Low Ripple Burst Mode® Operation Peak Current Mode Control Minimum On-Time: 25ns Safely Tolerates Inductor Saturation in Overload Shutdown Current: 1.2µA Precision 400mV Enable Thresholds Internal Soft-Start and Compensation Power Good Output Low Profile, Thermally Enhanced 12-Lead 2mm × 2mm × 0.74mm LQFN and 16-Ball 1.64mm × 1.64mm × 0.5mm WLCSP Packages AEC-Q100 Qualified for Automotive Applications

48-Port IEEE802.3bt (PoE 2) PSE Digital Controller Features: Fully Compliant IEEE 802.3bt Type 3 and 4 PSE Fully Compliant IEEE 802.3at Type 2 PSE Software-Compatible with LTC4291-1/LTC4292 Up to 48 PSE Ports with One Power Channel per Port Up to 24 PSE Ports with Two Power Channels per Port ECC-Protected eFlash and Data RAMs Low Power Path Dissipation per Channel 100mΩ Sense Resistance 30mΩ or Lower MOSFET RDS(ON) Chipset Provides Electrical Isolation Eliminates Optos and Isolated 3.3V Supply Very High Reliability Multipoint PD Detection Connection Check Distinguishes Single-Signature and Dual-Signature PDs Continuous Per-Port Power and Current Monitoring 1MHz I2C Compatible Serial Control Interface Pin or I2C Programmable PD Power Available in 24-Lead 4mm × 4mm (LTC91011) and a 64-Lead 7mm × 11mm (LTC9102/LTC9103) QFN Packages

High Efficiency, High Voltage 100mA Synchronous Step-Down Converter Features: Wide Input Voltage Range: Operation from 4.5V to 45V Overvoltage Lockout Provides Protection Up to 60V Internal High Side and Low Side Power Switches No Compensation Required 100mA Output Current Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 12μA 0.8V ±1% Feedback Voltage Reference Adjustable Peak Current Limit Internal and External Soft-Start Precise RUN Pin Threshold with Adjustable Hysteresis 3.3V, 5V and Adjustable Output Versions Only Three External Components Required for Fixed Output Versions Low Profile (0.75mm) 3mm × 3mm DFN and Thermally-Enhanced MS8E Packages

Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management Features: PMBus/I2C Compliant Serial Interface Telemetry Read Back includes VIN, IIN, VOUT, IOUT, Temperature and Faults Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV and Frequency Synchronization (250kHz to 1MHz) ±0.5% Output Voltage Accuracy Over Temperature Integrated 16-Bit ADC Internal EEPROM with ECC and Fault Logging Integrated Powerful N-Channel MOSFET Gate Drivers Power Conversion Wide VIN Range: 4.5V to 24V VOUT Range: 0.5V to 5.4V (4V on VOUT0) Analog Current Mode Control Loop Accurate PolyPhase® Current Sharing for Up to 6 Phases Available in a 40-Pin (6mm × 6mm) QFN Package AEC-Q100 Qualified for Automotive Applications

12 Channel Multicell Battery Monitor with Daisy Chain Interface, Generation 2 Features: Measures Up to 12 Battery Cells in Series Stackable Architecture Supports Multiple Battery Chemistries and Supercapacitors Serial Interface Daisy Chains to Adjacent Devices 0.25% Maximum Total Measurement Error Engineered for ISO26262 Compliant Systems 13ms to Measure All Cells in a System Passive Cell Balancing: Integrated Cell Balancing MOSFETs Ability to Drive External Balancing MOSFETs On-board Temperature Sensor and Thermistor Inputs 1MHz Serial Interface with Packet Error Checking Safe with Random Connection of Cells Built-In Self Tests Delta-Sigma Converter With Built-In Noise Filter Open-Wire Connection Fault Detection 12μA Standby Mode Supply Current High EMI Immunity 44-Lead SSOP Package

1.2MHz/2.2MHz Inverting DC/DC Converters in ThinSOT Features: Fixed Frequency 1.2MHz/2.2MHz Operation Very Low Noise: 1mVP-P Output Ripple –5V at 350mA from 5V Input –12V at 150mA from 5V Input Uses Small Surface Mount Components Wide Input Range: 2.6V to 16V Low Shutdown Current: <1µA Low VCESAT Switch: 400mV at 1A Pin-for-Pin Compatible with the LT1611 Low Profile (1mm) ThinSOT™ Package

3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller Features: 3-Phase Current Mode Controller with Onboard MOSFET Drivers ±5% Output Current Matching Optimizes Thermal Performance and Size of Inductors and MOSFETs Differential Amplifier Accurately Senses VOUT ±1% VREF Accuracy Over Temperature VOUT Range: 0.6V to 5.5V without Diffamp VOUT Range: 0.6V to (VCC – 1.2V) with Diffamp 250kHz to 600kHz Per Phase, PLL, Fixed Frequency PWM, Stage Shedding™ or Burst Mode® Operation OPTI-LOOP® Compensation Minimizes COUT Adjustable Soft-Start Current Ramping Short-Circuit Shutdown Timer with Defeat Option Overvoltage Soft Latch Adjustable Undervoltage Lockout Threshold Selectable Phase Output for Up to 12-Phase Operation Available in 5mm × 5mm QFN and 36-Pin Narrow (0.209') SSOP Packages

Dual Micropower Step-Up DC/DC Converter Features: Low Quiescent Current: 20µA in Active Mode <1µA in Shutdown Mode Operates with VIN as Low as 1.2V Low VCESAT Switches: 85mV at 70mA Uses Small Surface Mount Components High Output Voltage: Up to 34V Tiny 10-Pin MSOP Package

Dual, 550kHz, 2-Phase Synchronous Step-Down Switching Regulator Features: Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise OPTI-LOOP® Compensation Minimizes COUT ±1% Output Voltage Accuracy Power Good Output Voltage Indicator Phase-Lockable Fixed Frequency 250kHz to 550kHz Dual N-Channel MOSFET Synchronous Drive Wide VIN Range: 3.5V to 36V Operation Very Low Dropout Operation: 99% Duty Cycle Adjustable Soft-Start Current Ramping Foldback Output Current Limiting Latched Short-Circuit Shutdown with Defeat Option Output Overvoltage Protection Remote Output Voltage Sense Low Shutdown IQ : 20µA 5V and 3.3V Regulators 3 Selectable Operating Modes: Constant-Frequency, Burst Mode® Operation and PWM Available in 32-Pin 5mm x 5mm QFN and 28-Pin SSOP Packages