550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator Features: Wide VIN Range: 4V to 36V Operation Reduces Required Input Capacitance and Power Supply Induced Noise ±1% Output Voltage Accuracy Phase-Lockable Fixed Frequency: 250kHz to 550kHz True Remote Sensing Differential Amplifier PolyPhase™ Extends from Two to Twelve Phases Reduces the Size and Value of Inductors Current Mode Control Ensures Current Sharing 1.1MHz Effective Switching Frequency (2-Phase) OPTI-LOOP™ Compensation Reduces COUT Power Good Output Voltage Indicator Very Low Dropout Operation: 99% Duty Cycle Adjustable Soft-Start Current Ramping Internal Current Foldback Plus Shutdown Timer Overvoltage Soft-Latch Eliminates Nuisance Trips Available in 5mm x 5mm QFN and 28-Lead SSOP Package

Standalone Li-Ion Switch Mode Battery Charger Features: Wide Input Supply Range: 4.7V to 22V – 4.2 Version 8.9V to 22V – 8.4 Version High Efficiency Current Mode PWM Controller with 500kHz Switching Frequency ±1% Charge Voltage Accuracy End-of-Charge Current Detection Output 3 Hour Charge Termination Timer Constant Switching Frequency for Minimum Noise ±5% Charge Current Accuracy Low 10µA Reverse Battery Drain Current Automatic Battery Recharge Automatic Shutdown When Input Supply is Removed Automatic Trickle Charging of Low Voltage Batteries Battery Temperature Sensing and Charge Qualification Stable with Ceramic Output Capacitor 8-Lead SO and 10-Lead DFN Packages

10V Micropower Synchronous Boost Converter in ThinSOT Features: Small Solution Size >85% Efficiency over Wide Load Range Internal Synchronous Rectifier VIN Range: 1.5V to 5.5V 5V at 30mA from 3.3V Input 3.3V at 20mA from 2 AA Cell Input Programmable Output Voltages Up to 10V Burst Mode Operation Inrush Current Limiting Output Disconnect in Shutdown Ultralow Quiescent (10µA) and Shutdown (<1µA) Currents Low Prole 2mm × 2mm DFN, 2mm × 3mm DFN or SOT-23 Package

USB Compatible Lithium-Ion Battery Charger with Thermal Regulation Features: Charges Single-Cell Li-Ion Batteries Directly from USB Port Thermal Regulation Maximizes Charging Rate without Risk of Overheating* Programmable Charge Current with ±7% Accuracy Low Dropout Operation No External MOSFET, Sense Resistor or Blocking Diode Required Programmable Charge Termination Timer Preset Charge Voltage with ±1% Accuracy C/10 Charge Current Detection Output AC Present Logic Output 25µA Supply Current in Shutdown Mode Automatic Recharge Tiny Thermally Enhanced 10-Pin MSOP Package Charge Current Monitor Useful for Gas Gauging* Thermistor Input for Temperature Qualified Charging

Monolithic Linear Charger for Back-Up Li-Ion Batteries Features: Preset 4V Charge Voltage with 1% Accuracy Prolongs 4.2V Li-Ion Battery Lifetime Automatic Recharge Thermal Regulation Maximizes Charging Rate without Risk of Overheating* No MOSFET, Sense Resistor or Blocking Diode Required Programmable Charge Termination Timer Thermistor Input for Temperature Qualified Charging Programmable Charge Current with 7% Accuracy C/10 Charge Current Detection Output 25µA Supply Current in Shutdown Mode Charge Current Monitor Useful for Gas Gauging* Charges Directly from USB Port Tiny Thermally Enhanced 10-pin MSOP Package

Photoflash Capacitor Chargers in ThinSOT Features: Highly Integrated IC Reduces Solution Size Uses Small Transformers: 5.8mm × 5.8mm × 3mm Fast Photoflash Charge Times: 4.6s for LT3468 (0V to 320V, 100µF, VIN = 3.6V) 5.7s for LT3468-2 (0V to 320V, 100µF, VIN = 3.6V) 5.5s for LT3468-1 (0V to 320V, 50µF, VIN = 3.6V) Controlled Input Current: 500mA (LT3468) 375mA (LT3468-2) 225mA (LT3468-1) Supports Operation from Single Li-Ion Cell, or Any Supply from 2.5V up to 16V Adjustable Output Voltage No Output Voltage Divider Needed Charges Any Size Photoflash Capacitor Low Profile (<1mm) SOT-23 Package

Secondary-Side Synchronous Forward Controller with Polyphase Capability 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 PolyPhase® Operation Reduces CIN Requirements Current Mode Control Ensures Current Sharing PLL Fixed Frequency: 100kHz to 500kHz ±1% Output Voltage Accuracy True Remote Sense Differential Amplifier Power Good Output Voltage Monitor High Voltage Linear Regulator Controller Wide Supply Range: 5V to 30V Available in a Narrow 24-Lead SSOP Package

Micropower Synchronous Buck-Boost DC/DC Converter Features: Single Inductor Fixed Frequency Operation with Battery Voltages Above, Below or Equal to the Output Synchronous Rectification: Up to 96% Efficiency 25µA Quiescent Current in Burst Mode® Operation Up to 600mA Continuous Output Current No Schottky Diodes Required (VOUT < 4.3V) VOUT Disconnected from VIN During Shutdown 2.5V to 5.5V Input and Output Range Programmable Oscillator Frequency from 300kHz to 2MHz Synchronizable Oscillator Burst Mode Enable Control <1µA Shutdown Current Small Thermally Enhanced 10-Pin MSOP and (3mm × 3mm) DFN Packages

750mA Synchronous Step-Up DC/DC Converters with Reverse-Battery Protection Features: Reverse-Battery Protection for DC/DC Converter and Load High Efficiency: Up to 94% Generates 5V at 175mA from a 1.8V Input Operates from 1.8V to 5.5V Input Supply 2V to 6V Adjustable Output Voltage Inrush Current Controlled During Start-Up Output Disconnnect in Shutdown Low Noise 1.2MHz PWM Operation Tiny External Components Automatic Burst Mode® Operation (LTC3499) Continuous Switching at Light Loads (LTC3499B) Overvoltage Protection 8-Lead (3mm × 3mm × 0.75mm) DFN and MSOP Packages

500mA, 1.25MHz Synchronous Step-Up DC/DC Converter in 2mm 2mm DFN Package Features: High Efficiency: Up to 94% 3.3V at 200mA from Two Alkaline Cells 5V at 200mA from a Single Li-Ion Cell Inrush Current Limiting and Soft-Start Output Disconnect in Shutdown 1.8V to 5V VIN Range 1.8V to 5.25V VOUTRange 1.25MHz Fixed Frequency, Low Noise PWM Internal Synchronous Rectifier Logic Controlled Shutdown (<1μA) Anti-Ringing Control Minimizes EMI Tiny External Components Short-Circuit Protection Low Profile (0.75mm × 2mm × 2mm) DFN Package