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

500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm 2mm DFN Features: Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells VIN Start-Up Voltage: 850mV 1.6V to 5.25V VOUT Range Up to 94% Efficiency Output Disconnect 1MHz Fixed Frequency Operation VIN > VOUT Operation Integrated Soft-Start Current Mode Control with Internal Compensation Automatic Burst Mode® Operation with 9μA Quiescent Current (LTC3526) Low Noise PWM Operation (LTC3526B) Internal Synchronous Rectifier Logic Controlled Shutdown (IQ < 1μA) Anti-Ringing Control Low Profile (2mm × 2mm × 0.75mm) DFN 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

36V 10W No-Opto Isolated Flyback Converter Features: 4V to 36V Input Voltage Range 3.6A, 65V Internal DMOS Power Switch Low Quiescent Current Quasi-Resonant Boundary Mode Operation at Heavy Load Low Ripple Burst Mode® Operation at Light Load Minimum Load < 0.5% (Typ) of Full Output No Transformer Third Winding or Opto-Isolator Required for Output Voltage Regulation Accurate EN/UVLO Threshold and Hysteresis Temperature Compensation for Output Diode Output Short-Circuit Protection Thermally Enhanced 8-Lead SO Package

Micropower, Regulated Charge Pump DC/DC Converters Features: 5V Output Current: 100mA (VIN ≥ 3V) 3.3V Output Current: 80mA (VIN ≥ 2.5V) Ultralow Power: 20µA Quiescent Current Regulated Output Voltage: 3.3V ±4%, 5V ±4%, ADJ VIN Range: 2V to 5.5V 800kHz Switching Frequency No Inductors Very Low Shutdown Current: <2µA Shutdown Disconnects Load from VIN PowerGood/Undervoltage Output Adjustable Soft-Start Time Short-Circuit/Thermal Protection Available in 8-Pin MSOP

20-Bit Power No Latency ADC in SO-8 Features: 20-Bit ADC in SO-8 Package 8ppm INL, No Missing Codes at 20 Bits 4ppm Full-Scale Error 0.5ppm Offset 1.2ppm Noise Digital Filter Settles in a Single Cycle. Each Conversion Is Accurate, Even After an Input Step Fast Mode: 16-Bit Noise, 12 Bits TUE at 100sps Internal Oscillator—No External Components Required 110dB Min, 50Hz/60Hz Notch Filter Reference Input Voltage: 0.1V to VCC Live Zero—Extended Input Range Accommodates 12.5% Overrange and Underrange Single Supply 2.7V to 5.5V Operation Low Supply Current (200µA) and Auto Shutdown Pin Compatible with 24-Bit LTC2400

Lithium-Ion Battery Pulse Chargers with Overcurrent Protection Features: Complete Pulse Charger for 1-Cell Lithium-Ion Batteries Sense Resistor Limits Maximum Current for Safety 1% Float Voltage Accuracy End-of-Charge (C/10) Detection Output Programmable Charge Termination Timer Internal 0.35 NMOS Switch No Blocking Diode Required SEL Pin to Set Either 4.1V or 4.2V/Cell (LTC1730-4) Low-Battery Drain (1µA Max) when Input Supply Is Removed Battery Temperature Sensing and Charge Qualification Automatic Trickle Charge for Low-Battery Cell Automatic Battery Refresh

Wide Operating Range, No RSENSE Step-Down Controller Features: Wide VIN Range: 4V to 36V Sense Resistor Optional True Current Mode Control 2% to 90% Duty Cycle at 200kHz tON(MIN) ≤ 100ns Stable with Ceramic COUT Dual N-Channel MOSFET Synchronous Drive Power Good Output Voltage Monitor ±1% 0.6V Reference Adjustable Current Limit Adjustable Switching Frequency Programmable Soft-Start Output Overvoltage Protection Optional Short-Circuit Shutdown Timer Micropower Shutdown: IQ ≤ 30µA Available in a 1mm 20-Lead TSSOP Package

RF Power Detector with Buffered Output and >40dB Dynamic Range Features: Internal Schottky Diode RF Detector with Two Input Power Ranges: LTC5505-1, –28dBm to 18dBm LTC5505-2, –32dBm to 12dBm Wide Input Frequency Range: 300MHz to 3GHz (LTC5505-1); 300MHz to 3.5GHz (LTC5505-2) Temperature Compensated Buffered Detector Output Wide VCC Range of 2.7V to 6V Low Operating Current: 0.5mA Low Shutdown Current: <2µA Low Profile (1mm) ThinSOT™ Package

RF Power Detector with Buffered Output and >40dB Dynamic Range Features: Internal Schottky Diode RF Detector with Two Input Power Ranges: LTC5505-1, –28dBm to 18dBm LTC5505-2, –32dBm to 12dBm Wide Input Frequency Range: 300MHz to 3GHz (LTC5505-1); 300MHz to 3.5GHz (LTC5505-2) Temperature Compensated Buffered Detector Output Wide VCC Range of 2.7V to 6V Low Operating Current: 0.5mA Low Shutdown Current: <2µA Low Profile (1mm) ThinSOT™ Package