Wide Input Voltage Synchronous Buck-Boost DC/DC Converter Features: Regulated Output with Input Voltages Above, Below or Equal to the Output 1.8V to 5.5V Input and 1.8V to 5.25V Output Range 250mA Continuous Output Current from 1.8V VIN 600mA Continuous/1A Peak Output Current from Li-Ion Single Inductor Synchronous Rectication: Up to 96% Efciency Programmable Automatic Burst Mode® Operation Output Disconnect in Shutdown Pin Compatible with the LTC3440 Programmable Frequency from 300kHz to 2MHz <1µA Shutdown Current Small Thermally Enhanced 10-Lead (3mm × 3mm) DFN and 10-Lead MS Packages

Single Switch Synchronous Forward Controller Features: Synchronous Rectifier Control for High Efficiency Programmable Volt-Second Clamp Output Power Levels from 25W to 500W Low Current Start-Up (LT1952: 460µA; VIN On/Off = 14.25V/8.75V) (LT1952-1: 400µA; VIN On/Off = 7.75V/6.5V) True PWM Soft-Start Low Stress Short Circuit Protection Precision 107mV Current Limit Threshold Adjustable Delay for Synchronous Timing Accurate Shutdown Threshold with Programmable Hysteresis Programmable Slope Compensation Programmable Leading Edge Blanking Programmable Frequency (100kHz to 500kHz) Synchronizable to an External Clock up to 1.5 • fOSC Internal 1.23V Reference 2.5V External Reference Current Mode Control Small 16-Pin SSOP Package

Multiple Supply Hot Swap Controller with I2C Compatible Monitoring Features: Allows Safe Insertion into Live CompactPCI™ or PCI Express™ Backplane 8-Bit ADC Monitors Current and Voltage I2C™/SMBus Interface dI/dt Controlled Soft Start Simultaneous or Sequenced Turn-On ±20V Absolute Maximum Rating for ±12V Supplies No External Gate Capacitor Required Dual-Level Circuit Breaker and Current Limit Bus Precharge Output Power Good Input with Timeout Optional Latch-off or Autoretry After Faults Alerts Host After Faults Integrated LOCAL_PCI_RST# Logic 36-Pin SSOP and 38-Pin (5mm × 7mm) QFN Packages

High Performance, Multiphase Energy, and Power Quality Measurement IC Features: 7 high performance ADCs 101 dB SNR Wide input voltage range: ±1 V, 707 mV rms FS at gain = 1 Differential inputs ±25 ppm/°C maximum channel drift (including ADC, internal VREF, PGA drift) enabling 10000:1 dynamic input range Class 0.2 metrology with standard external components Power quality measurements Enables implementation of IEC 61000-4-30 Class S VRMS ½, IRMS ½ rms voltage refreshed each half cycle 10 cycle rms/12 cycle rms Dip and swell monitors Line frequency—one per phase Zero crossing, zero-crossing timeout Phase angle measurements Supports CTs and Rogowski coil (di/dt) sensors Multiple range phase/gain compensation for CTs Digital integrator for Rogowski coils Flexible waveform buffer Able to resample waveform to ensure 128 points per line cycle for ease of external harmonic analysis Events, such as dip and swell, can trigger waveform storage Simplifies data collection for IEC 61000-4-7 harmonic analysis Advanced metrology feature set Total and fundamental active power, volt amperes reactive (VAR), volt amperes (VA), watthour, VAR hour, and VA hour Total and fundamental IRMS, VRMS Total harmonic distortion Power factor Supports active energy standards: IEC 62053-21 and IEC 62053-22; EN50470-3; OIML R46; and ANSI C12.20 Supports reactive energy standards: IEC 62053-23, IEC 62053-24 High speed communication port: 20 MHz serial port interface (SPI) Integrated temperature sensor with 12-bit successive approximation register (SAR) ADC ±3°C accuracy from −40°C to +85°C

18-Cell Battery Monitor with Daisy Chain Interface Features: Measures up to 18 battery cells in series 3 mV maximum total measurement error Stackable architecture for high voltage systems Built-in isoSPI interface 1 Mb isolated serial communications Uses a single twisted pair, up to 100 meters Low EMI susceptibility and emissions Bidirectional for broken wire protection 290 μs to measure all cells in a system Synchronized voltage and current measurement 16-bit Δ-Σ ADC with programmable third-order noise filter Passive cell balancing up to 200 mA (maximum) with programmable pulsewidth modulation 9 general purpose digital I/O or analog inputs Temperature or other sensor inputs Configurable as an I2C or SPI master 6 μA sleep mode supply current 64-lead LQFP_EP package

Quad Voltage Monitor and Sequencer Features: Powered from 2.7 V to 5.5 V on the VCC pin Logical core with internal timeouts provides power supply sequencing and fault protection 4 inputs can be programmed to monitor different voltage levels with resistor dividers Monitors 4 supplies via 0.8% accurate comparators 3 open-drain enable outputs Open-drain power-good output (PWRGD) 10-lead MSOP

3 kV RMS Signal and Power Isolated RS-485 Transceiver with 15 kV IEC ESD Features: 3 kV rms isolated RS-485/RS-422 transceiver Low radiated emissions, integrated, isolated dc-to-dc converter Passes EN 55032 Class B with margin on a 2-layer PCB Cable invert smart feature Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature ESD protection on RS-485 A, B, Y and Z pins ≥±12 kV IEC61000-4-2 contact discharge ≥±15 kV IEC61000-4-2 air discharge High speed 25 Mbps data rate (ADM2565E/ADM2567E) Low speed 500 kbps data rate for EMI control (ADM2561E/ADM2563E) Flexible power supplies Input VCC supply of 3 V to 5.5 V Logic VIO supply of 1.7 V to 5.5 V VSEL pin to select VISO supply of 5 V (VCC > 4.5 V) or 3.3 V PROFIBUS compliant for 5 V VISO Wide operating temperature range: −40°C to +105°C High common-mode transient immunity: 250 kV/µs Short-circuit, open-circuit, and floating input receiver fail-safe Supports 196 bus nodes (72 kΩ receiver input impedance) Full hot swap support (glitch free power-up/power-down) Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1 Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) 28-lead, fine pitch SOIC_W package (10.15 mm 10.05 mm) with >8.0 mm creepage and clearance

Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing Features:Sub-Milliohm DCR Current SensingOperates with Power Blocks, DRMOS or External Gate Drivers and MOSFETsSupports Phase Shedding and N+1 Phase RedundancyProgrammable DCR Temperature Compensation±0.75% Maximum Total DC Output Error Over TemperatureDual Differential Remote Output Voltage Sense AmplifiersPhase-Lockable Fixed Frequency Range: 200kHz to 1.2MHzVIN Range: 4.5V to 38VVOUT Range: 0.6V to 3.5VSupports Smooth Start-Up into Pre-Biased OutputsProgrammable Soft-Start or VOUT TrackingHiccup Mode/Soft Recovery from Output Overcurrent36-Lead (5mm × 6mm) QFN Package

Multi-Phase Current Mode Step-Up DC/DC Controller Features: Wide VIN Range: 5.5V to 36V Operation 2-Phase Operation Reduces Input and Output Capacitance Fixed Frequency, Peak Current Mode Control Internal 10V LDO Regulator Lower UVLO Thresholds Allows the Use of MOSFETs Rated at 6V VGS Adjustable Slope Compensation Gain Adjustable Max Duty Cycle (Up to 96%) Adjustable Leading Edge Blanking ±1% Internal Voltage Reference Programmable Operating Frequency with One External Resistor (75kHz to 500kHz) Phase-Lockable Fixed Frequency 50kHz to 650kHz SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or 12-Phase Operation (PHASEMODE Programmable) 24-Lead Narrow SSOP Package 5mm × 5mm QFN Package with 0.65mm Lead Pitch 24-Lead Thermally Enhanced TSSOP Package

42V, 6A Synchronous Step-Down Regulator with 3A Quiescent Current Features: Wide Input Voltage Range: 3.4V to 42V Ultralow Quiescent Current Burst Mode® Operation: 3μA IQ Regulating 12VIN to 3.3VOUT Output Ripple < 10mVP-P High Efficiency Synchronous Operation: 95% Efficiency at 3A, 5VOUT from 12VIN 94% Efficiency at 3A, 3.3VOUT from 12VIN Fast Minimum Switch-On-Time: 40ns Low Dropout Under All Conditions: 250mV at 3A Allows Use Of Small Inductors Safely Tolerates Inductor Saturation in Overload Conditions Adjustable and Synchronizable: 200kHz to 2.2MHz Current Mode Operation Accurate 1V Enable Pin Threshold Internal Compensation Output Soft-Start and Tracking Small Thermally Enhanced 3mm × 6mm 28-Lead QFN Package AEC-Q100 Qualified for Automotive Applications