High Efficiency Bidirectional Multicell Battery Balancer Features: Bidirectional Synchronous Flyback Balancing of Up to 6 Li-Ion or LiFePO4 Cells in Series Up to 10A Balancing Current (Set by Externals) Integrates Seamlessly with the LTC680x Family of Multicell Battery Stack Monitors Bidirectional Architecture Minimizes Balancing Time and Power Dissipation Up to 92% Charge Transfer Efficiency Stackable Architecture Enables >1000V Systems Uses Simple 2-Winding Transformers 1MHz Daisy-Chainable Serial Interface with 4-Bit CRC Packet Error Checking High Noise Margin Serial Communication Numerous Fault Protection Features 48-Lead Exposed Pad QFN and LQFP Packages AEC-Q100 Qualified for Automotive Applications

PolyPhaseSynchronous Boost Controller with Input/Output Protection Features: Input Supply Range: 4.5V to 65V (Up to 75V Surge) Reverse Input Protection to –40V In-Rush Current Control, Overcurrent Protection and Output Disconnect for Boost Converter Input Voltage Surge Protection with Adjustable Clamp Voltage Onboard Ideal Diode Controller Low Quiescent Current: 55µA 2-Phase Operation Reduces Required Input and Output Capacitance and Noise Output Voltage Up to 60V Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) for Logic-Level or Standard Threshold FETs No External Bootstrap Diodes Required

10A Guaranteed SOA Hot Swap Controller Features:Allows Safe Board Insertion into a Live BackplaneSmall Footprint10mΩ MOSFET Including RSENSESafe Operating Area Guaranteed at 41W, 30msWide Operating Voltage Range: 2.9V to 15VAdjustable, 11% Accurate Current LimitCurrent and Temperature Monitor OutputsOvertemperature ProtectionAdjustable Current Limit Timer Before FaultPower Good and Fault OutputsAdjustable Inrush Current Control2.5% Accurate Undervoltage and Overvoltage ProtectionAvailable in 38-Lead (5mm × 9mm) QFN PackagePin Compatible with LTC4234

18V, 5A Synchronous Buck-Boost DC/DC Converter Features:Input Voltage Range: 2.5V to 18VRuns Down to VIN = 250mV After Start-UpOutput Voltage Range: 0.8V to 18V5A Output Current in Buck Mode, VIN > 6V3A Output Current for VIN = 3.6V, VOUT = 5VProgrammable Switching Frequency: 400kHz to 2MHzSynchronizable with an External Clock Up to 2MHzAccurate Run Comparator ThresholdBurst Mode® Operation, No-Load IQ = 35μAUltralow Noise Buck-Boost PWMCurrent Mode ControlMaximum Power Point ControlPower Good IndicatorInternal Soft-Start28-Lead 4mm × 5mm QFN and TSSOP Packages

Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier Features: Low power: 1.1 mA/amp Low wideband noise 2.1 nV/√Hz 1.4 pA/√Hz Low 1/f noise 7 nV/√Hz @ 10 Hz 13 pA/√Hz @ 10 Hz Low distortion: −105 dBc @ 100 kHz, VO = 2 V p-p High speed 80 MHz, −3 dB bandwidth (G = +1) 12 V/μs slew rate 175 ns settling time to 0.1% Low offset voltage: 0.3 mV maximum Rail-to-rail output Power down Wide supply range: 2.7 V to 12 V

Quad 12-Bit Serial Voltage Output DAC Features: Guaranteed monotonic over temperature Excellent matching between DACs Unipolar or bipolar operation Buffered voltage outputs High speed serial digital interface Reset-to-zero scale or midscale Wide supply range, +5 V only to ±15 V Low power consumption (35 mW maximum) Available in 16-Lead PDIP, SOIC, and CERDIP packages

High Efficiency Battery Charger/USB Power Manager Features: Switching Regulator Makes Optimal Use of Limited Power Available from USB Port to Charge Battery  and Power Application 180mΩ Internal Ideal Diode Plus Optional External Ideal Diode Controller Seamlessly Provides Low  Loss Power Path When Input Power is Limited or  Unavailable Full Featured Li-Ion/Polymer Battery Charger VBUS Operating Range: 4.25V to 5.5V (7V Absolute  Maximum—Transient) 1.2A Maximum Input Current Limit 1.5A Maximum Charge Current with Thermal Limiting Bat-Track Adaptive Output Control Slew Control Reduces Switching EMI Low Profile (0.75mm) 14-Lead 4mm × 3mm DFN Package

Micropower Low Noise Boost Converters with Output Disconnect Features: Low Quiescent Current 65µA in Active Mode 1µA in Shutdown Mode Switching Frequency is Non-Audible Over Entire Load Range Integrated Power NPN: 350mA Current Limit (LT3494A) 180mA Current Limit (LT3494) Integrated Schottky Diode Integrated Output Disconnect Integrated Output Dimming Wide Input Range: 2.3V to 16V Wide Output Range: Up to 40V Tiny 8-Lead 3mm × 2mm DFN Package

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

Half-Bridge N-Channel Power MOSFET Driver with Boost Regulator Features: Floating Top Driver Switches Up to 60V Internal Boost Regulator for DC Operation 180ns Transition Times Driving 10,000pF Adaptive Nonoverlapping Gate Drives Prevent Shoot-Through Drives Gate of Top N-Channel MOSFET Above Supply Top Drive Maintained at High Duty Cycles TTL/CMOS Input Levels Undervoltage Lockout with Hysteresis Operates at Supply Voltages from 10V to 15V Separate Top and Bottom Drive Pins