Boost/Inverting DC/DC Converter with 2A Switch, Soft-Start, and Synchronization Features: 2A Internal Power Switch Adjustable Switching Frequency Single Feedback Resistor Sets VOUT Synchronizable to External Clock High Gain SHDN Pin Accepts Slowly Varying Input Signals Wide Input Voltage Range: 2.5V to 32V Low VCESAT Switch: 300mV at 1.5A (Typical) Integrated Soft-Start Function Easily Configurable as a Boost or Inverting Converter User Configurable Undervoltage Lockout (UVLO) Tiny 8-Lead 3mm × 3mm DFN and 8-Lead MSOP Packages

Boost/Inverting DC/DC Converter with 2A Switch, Soft-Start, and Synchronization Features: 2A Internal Power Switch Adjustable Switching Frequency Single Feedback Resistor Sets VOUT Synchronizable to External Clock High Gain SHDN Pin Accepts Slowly Varying Input Signals Wide Input Voltage Range: 2.5V to 32V Low VCESAT Switch: 300mV at 1.5A (Typical) Integrated Soft-Start Function Easily Configurable as a Boost or Inverting Converter User Configurable Undervoltage Lockout (UVLO) Tiny 8-Lead 3mm × 3mm DFN and 8-Lead MSOP Packages

500mA Wide Input Voltage Range Step-Down LED Driver with 10:1 Dimming Features: Wide Input Voltage Range Operation from 3.6V to 36V Resistor Adjustable 400kHz–2.2MHz Switching Frequency Shorted and Open LED Protected Internal Switch Current Sense Resistor External Resistor Programs LED Current, Pin Selects 10:1 Ratio 50mA/500mA LED Current Settings Catch Diode Current Sense to Prevent Runaway at High VIN Small Thermally Enhanced 10-Lead DFN (2mm × 3mm) and MSOP-10 Packages

1MHz White LED Driver with Output Disconnect and One Pin Current Programming Features: Drives Up to Ten White LEDs from a 3V Supply One Pin Shutdown and Current Programming LEDs Disconnected in Shutdown 32:1 Linear Brightness Control Range VIN Range: 2.7V to 5.5V ±5% Output Current Accuracy at Full Scale Low Shutdown Current: 3μA 1MHz Switching Frequency Requires Only 1μF Output Capacitor Low Prole 6-Lead DFN (2mm × 2mm × 0.75mm) and 6-Lead SOT-23 Packages

60V Step-Down LED Driver Features: 300mA Buck Regulator, Drives Up to 10 LEDs per Channel with Fast NPN Current Sources Fast Current Sources for <1μs Pulse Widths (10,000:1 True Color PWM™ Dimming at 100Hz) LEDs Disconnected in Shutdown Adaptive VOUT for Increased Efficiency 6V to 60V Input Voltage Range ±1.5% Accurate LED Current Matching External Resistors Set LED Current for Each Channel Requires No External Compensation Programmable Switching Frequency (200kHz to 1MHz) Synchronizable to External Clock Open, Short LED Detection and Reporting Programmable LED Thermal Derating and Reporting Programmable Temperature Protection 5mm × 8mm Thermally Enhanced QFN Package with 0.6mm High Voltage Pin Spacing

LTPoE++/PoE+/PoE PD Controller Features: IEEE 802.3af/at and LTPoE++™ Powered Device (PD) Controller LTPoE++ Supports Power Levels Up to 90W LT4275A Supports All of the Following Standards: LTPoE++ 38.7W, 52.7W, 70W and 90W IEEE 802.3at 25.5W Compliant IEEE 802.3af Up to 13W Compliant LT4275B is IEEE 802.3at/af Compliant LT4275C is IEEE 802.3af Compliant 100V Absolute Maximum Input Voltage Wide Junction Temperature Range (–40°C to 125°C) Overtemperature Protection Integrated Signature Resistor External Hot Swap™ N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency Programmable Aux Power Support as Low as 9V Optional Support of Non-Standard Low Voltage PoE Available in 10-Lead MSOP and 3mm × 3mm DFN Packages

LTPoE++/IEEE 802.3bt PD Interface Controller Features: LTPoE++®/IEEE 802.3bt Powered Device (PD) Controller Supports Up to 90W PDs Distinguishes Between LTPoE++ and IEEE 802.3bt PSEs 5-Event Classification Sensing Superior Surge Protection (100V Absolute Maximum) Wide Junction Temperature Range (–40°C to 125°C) Overtemperature Protection Integrated Signature Resistor External Hot Swap N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency Configurable Aux Power Support as Low as 9V Pin Compatible with LT4275A/B/C and LT4294 Available in 10-Lead MSOP and 3mm × 3mm DFN Packages

High Voltage Surge Stopper with Current Limit Features: Withstands Surges Over 80V with VCC Clamp Wide Operating Voltage Range: 4V to 80V Adjustable Output Clamp Voltage Fast Overcurrent Limit: Less Than 5μs Reverse Input Protection to –60V Adjustable UV/OV Comparator Thresholds Low 7μA Shutdown Current Shutdown Pin Withstands –60V to 100V Adjustable Fault Timer Controls N-Channel MOSFET Less Than 1% Retry Duty Cycle During Faults, LT4363-2 Available in 12-Pin (4mm × 3mm) DFN, 12-Pin MSOP or 16-Pin SO Packages

High Voltage Surge Stopper with Current Limit Features: Withstands Surges Over 80V with VCC Clamp Wide Operating Voltage Range: 4V to 80V Adjustable Output Clamp Voltage Fast Overcurrent Limit: Less Than 5μs Reverse Input Protection to –60V Adjustable UV/OV Comparator Thresholds Low 7μA Shutdown Current Shutdown Pin Withstands –60V to 100V Adjustable Fault Timer Controls N-Channel MOSFET Less Than 1% Retry Duty Cycle During Faults, LT4363-2 Available in 12-Pin (4mm × 3mm) DFN, 12-Pin MSOP or 16-Pin SO Packages

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package

Quad Matched Resistor Network Features: Excellent Matching A-Grade: 0.01% Matching B-Grade: 0.025% Matching 0.2ppm/°C Matching Temperature Drift ±75V Operating Voltage (±80V Abs Max) 8ppm/°C Absolute Resistor Value Temperature Drift Long-Term Stability: <2ppm at 2000 Hrs –55°C to 150°C Operating Temperature 8-Lead MSOP Package