Precision Micropower RMS-to-DC Converter Features: Simple to Use, Requires One Capacitor True RMS DC Conversion Using Σ Technology High Accuracy: 0.1% Gain Accuracy from 50Hz to 1kHz 0.25% Total Error from 50Hz to 1kHz High Linearity: 0.02% Linearity Allows Simple System Calibration Low Supply Current: 155μA Typ, 170μA Max Ultralow Shutdown Current: 0.1μA Constant Bandwidth: Independent of Input Voltage 800kHz –3dB, 6kHz ±1% Flexible Supplies: 2.7V to 5.5V Single Supply Up to ±5.5V Dual Supply Flexible Inputs: Differential or Single-Ended Rail-to-Rail Common Mode Voltage Range Up to 1VPEAK Differential Voltage Flexible Output: Rail-to-Rail Output Separate Output Reference Pin Allows Level Shifting Wide Temperature Range: –55°C to 125°C Small Size: Space Saving 8-Pin MSOP Package

Wide Operating Range, No RSENSE Step-Down Controller for DDR/QDR Memory Termination Features: VOUT = 1/2 VIN (Supply Splitter) Adjustable and Symmetrical Sink/Source Current Limit up to 20A ±0.65% Output Voltage Accuracy Up to 97% Efficiency No Sense Resistor Required Ultrafast Transient Response 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 Wide VCC Range: 4V to 36V Adjustable Switching Frequency up to 1.5MHz Output Overvoltage Protection Optional Short-Circuit Shutdown Timer Available in a 16-Pin Narrow SSOP Package

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator Features: 180° Phased Dual Controllers Reduce Required Input Capacitance and Power Supply Induced Noise OPTI-LOOP® Compensation Minimizes COUT ±1.5% Output Voltage Accuracy over Temperature Dual N-Channel MOSFET Synchronous Drive Power Good Output Voltage Monitor DC Programmed Fixed Frequency 150kHz to 300kHz Wide VIN Range: 4.5V to 28V Operation Very Low Dropout Operation: 99% Duty Cycle Adjustable Soft-Start Current Ramping Foldback Output Current Limiting Latched Short-Circuit Shutdown with Defeat Option Output Overvoltage Protection Remote Output Voltage Sense Low Shutdown IQ : 20µA 5V and 3.3V Standby Regulators Selectable Constant Frequency, Burst Mode® Operation or PWM Operation Small 28-Lead Narrow SSOP Package

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators Features: Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 14V Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise OPTI-LOOP® Compensation Minimizes COUT ±1% Output Voltage Accuracy Power Good Output Voltage Monitor Phase-Lockable Fixed Frequency 250kHz to 550kHz Dual N-Channel MOSFET Synchronous Drive Wide VIN Range: 4V to 36V Operation Very Low Dropout Operation: 99% Duty Cycle Adjustable Soft-Start Current Ramping Foldback Output Current Limiting Output Overvoltage Protection Low Shutdown IQ: 20µA Selectable Constant Frequency or Burst Mode® Operation Small 28-Lead SSOP Package

1kHz-3GHz High Signal Level Active Mixer Features: Broadband RF, LO and IF Operation High Input IP3: >20dBm from 30MHz to 900MHz +17dBm at 1900MHz Typical Conversion Gain: 1dB SSB Noise Figure: 11dB at 900MHz 14dB at 1900MHz Integrated LO Buffer: Insensitive to LO Drive Level Single-Ended or Differential LO Drive High LO-RF Isolation Enable Function 4.5V to 5.25V Supply Voltage Range 4mm x 4mm QFN Package

Dual Smart Battery System Manager Features: SMBus Charger/Selector for Two Smart Batteries* Voltage and Current Accuracy within 0.2% of Value Reported by Battery Simplifies Construction of “Smart Battery System Manager” Includes All SMBus Charger V1.1 Safety Features Supports Autonomous Operation without a Host Allows Both Batteries to Discharge Simultaneously into Single Load with Low Loss (Ideal Diode) SMBus Switching for Dual Batteries with Alarm Monitoring for Charging Battery at All Times Pin Programmable Limits for Maximum Charge Current and Voltage Improve Safety Fast Autonomous Power Path™ Switching (<10µs) Low Loss Simultaneous Charging of Two Batteries >95% Efficient Synchronous Buck Charger AC Adapter Current Limiting* Maximizes Charge Rate SMBus Accelerator Improves SMBus Timing** Available in 48-Lead TSSOP Package

1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT Features: High Efficiency: Up to 96% Very Low Quiescent Current: Only 20µA During Operation 600mA Output Current 2.5V to 5.5V Input Voltage Range 1.5MHz Constant Frequency Operation No Schottky Diode Required Low Dropout Operation: 100% Duty Cycle 0.6V Reference Allows Low Output Voltages Shutdown Mode Draws </=1µA Supply Current Current Mode Operation for Excellent Line and Load Transient Response Overtemperature Protected Low Profile (1mm) ThinSOT™ Package

1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT Features: High Efficiency: Up to 96% Very Low Quiescent Current: Only 20µA During Operation 600mA Output Current 2.5V to 5.5V Input Voltage Range 1.5MHz Constant Frequency Operation No Schottky Diode Required Low Dropout Operation: 100% Duty Cycle 0.6V Reference Allows Low Output Voltages Shutdown Mode Draws ≤1µA Supply Current Current Mode Operation for Excellent Line and Load Transient Response Overtemperature Protected Low Profile (1mm) ThinSOT™ Package

1kHz-3GHz High Signal Level Active Mixer Features: Broadband RF, LO and IF Operation High Input IP3: >20dBm from 30MHz to 900MHz +17dBm at 1900MHz Typical Conversion Gain: 1dB SSB Noise Figure: 11dB at 900MHz 14dB at 1900MHz Integrated LO Buffer: Insensitive to LO Drive Level Single-Ended or Differential LO Drive High LO-RF Isolation Enable Function 4.5V to 5.25V Supply Voltage Range 4mm x 4mm QFN Package

White LED Step-Up Converter in SC70 and ThinSOT Features: Inherently Matched LED Current High Efficiency: 84% Typical Drives Up to Four LEDs from a 3.2V Supply Drives Up to Six LEDs from a 5V Supply 36V Rugged Bipolar Switch Fast 1.2MHz Switching Frequency Uses Tiny 1mm Tall Inductors Requires Only 0.22µF Output Capacitor Low Profile SC70 and ThinSOT™ Packaging