2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT Features: High Efficiency: Up to 95% Low Output Ripple (<20mVP-P): Burst Mode® Operation: IQ = 16µA 2.5V to 5.5V Input Voltage Range 2.25MHz Constant Frequency Operation Synchronizable to External Clock No Schottky Diode Required Stable with Ceramic Capacitors Low Dropout Operation: 100% Duty Cycle 0.6V Reference Allows Low Output Voltages Shutdown Mode Draws < 1µA Supply Current ±2% Output Voltage Accuracy Current Mode Operation for Excellent Line and Load Transient Response Overtemperature Protected Low Profile (1mm) ThinSOT™ Package

Secondary-Side Synchronous Forward Controller Features: Secondary-Side Control for Fast Transient Response Self-Starting Architecture Eliminates Need for Separate Bias Regulator Proprietary Gate Drive Encoding Scheme Reduces System Complexity Current Mode Control Ensures Current Sharing PLL Fixed Frequency: 100kHz to 500kHz ±1% Output Voltage Accuracy OPTI-LOOP Compensation Available in a Narrow 16-Lead SSOP Package

Standalone USB Li-Ion/Polymer Battery Charger in 2mm x 2mm DFN Features: Full-Featured Standalone USB Li-Ion/Polymer Battery Charger 100mA to 950mA Programmable Charge Current C/10 Charge Current Detection Output Internal Safety Timer Termination NTC Thermistor Input for Temperature Qualified Charging Preset 4.2V Float Voltage with 0.5% Accuracy Constant-Current/Constant-Voltage Operation with Thermal Feedback Charge Current Monitor Output for Gas Gauging Automatic Recharge Bad-Battery Detection 8.5µA Input Supply Current in Suspend Mode Tiny 8-Lead (2mm × 2mm) DFN Package

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

2-Phase Step-Up DC/DC Controller Features: 2-Phase Operation Reduces Required Input and Output Capacitance Programmable Switching Frequency: 150kHz to 500kHz 6V to 40V Input Range 10V Gate Drive with VCC ≥13V High Current Gate Drive (4A) Programmable Soft-Start and Current Limit Programmable Slope Compensation for High Noise Immunity MOSFET Gate Signals with Programmable Falling Edge Delay for External Synchronous Drivers Programmable Undervoltage Lockout Programmable Duty Cycle Clamp (50% or Higher) Thermally Enhanced 28-Lead TSSOP and 4mm x 5mm QFN Packages

Ultralow EMI 28VIN, 6A DC/DC Module Regulator Features: Complete Low EMI Switch Mode Power Supply Wide Input Voltage Range: 4.5V to 28V 6A DC Typical, 8A Peak Output Current 0.6V to 5V Output Voltage Range EN55022 Class B Certified Output Voltage Tracking and Margining PLL Frequency Synchronization ±1.75% Total DC Error Power Good Output Current Foldback Protection (Disabled at Start-Up) Parallel/Current Sharing Current Mode Control Up to 93% Efficiency at 5VIN, 3.3VOUT Programmable Soft-Start Output Overvoltage Protection –55°C to 125°C Operating Temperature Range (LTM4606MP) SnPb or RoHS Compliant Finish 15mm × 15mm × 2.82mm LGA Package 15mm × 15mm × 3.42mm BGA Package

Secondary-Side Synchronous Forward Controller Features: Secondary-Side Control for Fast Transient Response Self-Starting Architecture Eliminates Need for Separate Bias Regulator Proprietary Gate Drive Encoding Scheme Reduces System Complexity Current Mode Control Ensures Current Sharing PLL Fixed Frequency: 100kHz to 500kHz ±1% Output Voltage Accuracy OPTI-LOOP Compensation Available in a Narrow 16-Lead SSOP Package

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

37V/1.2A Step-Down Regulator in 3mm 3mm DFN Features: Wide Input Range: Operation from 3.6V to 37V Overvoltage Lockout Protects Circuit Through 55V Transients Low Minimum On-Time: Converts 16VIN to 3.3VOUT at 2MHz 1.2A Output Current Adjustable Frequency: 300kHz to 2.5MHz Constant Switching Frequency at Light Loads Tracking and Soft-Start Precision UVLO Short-Circuit Robust IQ in Shutdown <1μA Internally Compensated 10-Lead 3mm × 3mm DFN Package