40A DC/DC Module Regulator Features: Stacked Inductor Acts as Heat Sink Wide Input Voltage Range: 4.7V to 15V 0.6V to 3.3V Output Voltage Range ±1.3% Total DC Output Voltage Error Over Line, Load and Temperature (–40°C to 125°C) Differential Remote Sense Amplifier for Precision Regulation Current Mode Control/Fast Transient Response Frequency Synchronization Parallel Current Sharing (Up to 240A) Internal or External Compensation 88% Efficiency (12VIN, 1VOUT) at 40A Overcurrent Foldback Protection 16mm × 16mm × 7.07mm BGA Package

Doubler Charge Pumps with Low Noise Linear Regulator Features: Low Output Noise: 60µVRMS (100kHz BW) Adjustable or Fixed Boosted Output Adjustable Output Voltage Range: 2.5V to 5.5V Fixed Output Voltages: 3.3V, 5V Wide Input Voltage Range: 1.8V to 4.4V Uses Small Ceramic Capacitors No Inductors Required Output Current up to 50mA 550kHz Switching Frequency Low Operating Current: 150µA Low Shutdown Current: 1µA Internal Thermal Shutdown and Current Limiting Available in 8-Pin MSOP and SO Packages

IEEE 802.3bt PD Interface with Forward/Flyback Controller Features: IEEE 802.3af/at/bt Powered Device (PD) with Forward/Flyback Controller Supports Up to 71.3W PDs 5-Event Classification Sensing Superior Surge Protection (100V Absolute Maximum) Wide Junction Temperature Range (–40°C to 125°C) >94% End-to-End Efficiency with LT4321 Ideal Bridge External Hot Swap N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency No-Opto Flyback Operation Auxiliary Power Support as Low as 9V Easy Migration of LTPoE++® PDs to IEEE 802.3bt PDs Pin Compatible with LT4276A/B/C 28-Lead 4mm × 5mm QFN Package

36V Battery Charger and Power Backup Manager Features: Seamless Transition Between Primary Power Source and Li-Ion Battery 2A High Voltage Step-Down Regulator with Adaptive Output Control Internal 75mΩ Ideal Diode Plus Optional External Ideal Diode Controller Provides Low Loss PowerPath™ When Primary Supply Not Present Wide Input Voltage Range: 6V to 36V (60V Abs Max) 4.45V Max Output Voltage Full Featured Li-Ion Battery Charger Pin Selectable 4.1V and 4.2V Charge Voltage Options Thermally Enhanced Low Profile (0.75mm) 6mm × 3mm 22-Lead DFN Package

2.5A Supercapacitor Backup Power Manager Features: 2.5A Step-Down Supercapacitor Charger and 2.5A Step-Up Backup Supply 6.5A Switches for 2.5A Backup from One Supercapacitor or Two in Series Input Current Limit Prioritizes Load over Charge Current Input Disconnect Switch Isolates Input During Backup Automatic Seamless Switch-Over to Backup Mode Internal Supercapacitor Balancer (No External Resistors) Programmable Charge Current and Charge Voltage Input Power Fail Indicator System Power Good Indicator Optional OVP Circuitry Protects Device to >60V Constant Frequency Operation Thermally Enhanced 24-Lead 4mm × 5mm QFN Package

25A, Dual PolyPhase Regulator 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/OC Sub-Milliohm DCR Current Sensing Digitally Adjustable Loop Compensation Parameters 0.5% Output Voltage Accuracy Over Temperature Integrated Input Current Sense Amplifier Internal EEPROM with ECC and Fault Logging Integrated N-Channel MOSFET Gate Drivers

Anyside High Voltage Isolated Switch Controller with I2C Command and Telemetry Features: CSA (IEC/UL) Approved, File #255632 Reinforced Insulation Integrated Isolated Power Supply Adjustable Turn-On Ramp Rate and Current Limit I2C/SMBus Interface 10-Bit ADC Monitors Current and Two Uncommitted Channels High Common Mode Transient Immunity: ≥ 30kV/μs Fault Status Alert and Power Good Outputs Independent 3V to 5.5V Logic Supply ±20kV ESD Across the Isolation Barrier Maximum Continuous Working Voltage: 690VRMS 14.6mm Creepage Distance Low Current Shutdown Mode (<10μA) 22mm × 9mm × 5.16mm BGA Package

The LTM4603HV is a complete 6A step-down switch mode DC/DC power supply with onboard switching controller, MOSFETs, inductor and all support components. The μModule™ is housed in a small surface mount 15mm × 15mm × 2.82mm LGA package. Operating over an input voltage range of 4.5 to 28V, the LTM4603HV supports an output voltage range of 0.6V to 5V as well as output voltage tracking and margining. The high efficiency design delivers 6A continuous current (8A peak). Only bulk input and output capacitors are needed to complete the design.The low profile (2.82mm) and light weight (1.7g) package easily mounts on the unused space on the back side of PC boards for high density point of load regulation. The μModule can be synchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase® operation for high load currents.A high switching frequency and adaptive on-time current mode architecture deliver a very fast transient response to line and load changes without sacrificing stability. An onboard remote sense amplifier can be used to accurately regulate an output voltage independent of load current.Applications Telecom and Networking Equipment Servers Industrial Equipment Point of Load Regulation

The LTC2953 is a push button On/Off controller that manages system power via a push button interface. An enable output toggles system power while an interrupt output provides debounced push button status. The interrupt output can be used in menu driven applications to request a system power down. The LTC2953 also features input and output power supply monitors. An uncommitted power fail comparator provides real time input monitor information, while a de-glitched under voltage lockout comparator gracefully initiates a system power down. The under voltage lockout comparator prevents the system from powering from a low power supply. The adjustable supply monitor input is compared against an accurate internal 0.5V reference. The reset output remains low until the supply monitor input has been in compliance for 200ms. The LTC2953 operates over a wide 2.7V to 27V input voltage range and draws only 14µA of current. Two versions of the part accommodate either positive or negative enable polarities. Applications Push Button Power Path Control Battery Power Supervisor Portable Instrumentation, PDA Blade Servers Desktop and Notebook Computers

The LTM8023 is a complete 2A, DC/DC step-down power supply. Included in the package are the switching controller, power switches, inductor, and all support components. Operating over an input voltage range of 3.6V to 36V, the LTM8023 supports an output voltage range of 0.8V to 10V, and a switching frequency range of 200kHz to 2.4MHz, each set by a single resistor. Only the bulk input and output filter capacitors are needed to finish the design.The low profile package enables utilization of unused space on the bottom of PC boards for high density point of load regulation.The LTM8023 is packaged in a thermally enhanced, compact and low profile over-molded land grid array (LGA) and ball grid array (BGA) packages suitable for automated assembly by standard surface mount equipment. The LTM8023 is available with SnPb (BGA) or RoHS compliant terminal finish.Applications Automotive Battery Regulation Power for Portable Products Distributed Supply Regulation Industrial Supplies Wall Transformer Regulation