Single 18MHz, Low Noise, Rail-to-Rail Output, CMOS Op Amp Features: 0.1Hz to 10Hz Noise: 550nVP-P Input Bias Current: 0.2pA (Typ at 25°C) 1pA Max (LTC6240) Low Offset Voltage: 125μV Max Low Offset Drift: 2.5μV/°C Max Gain Bandwidth Product: 18MHz Output Swings Rail-to-Rail Supply Operation: 2.8V to 6V LTC6240/LTC6241/LTC6242 2.8V to ±5.5V LTC6240HV/LTC6241HV/LTC6242HV Low Input Capacitance H-Grade Temperature Range: –40°C to 125°C Single LTC6240 in 5-Pin Low Profile (1mm) ThinSOT™ Package and 8-Pin SO for PCB Guard Ring Dual LTC6241 in 8-Pin SO and Tiny DFN Packages Quad LTC6242 in 16-Pin SSOP and 5mm × 3mm DFN Packages

Single 18MHz, Low Noise, Rail-to-Rail Output, CMOS Op Amp Features: 0.1Hz to 10Hz Noise: 550nVP-P Input Bias Current: 0.2pA (Typ at 25°C) 1pA Max (LTC6240) Low Offset Voltage: 125μV Max Low Offset Drift: 2.5μV/°C Max Gain Bandwidth Product: 18MHz Output Swings Rail-to-Rail Supply Operation: 2.8V to 6V LTC6240/LTC6241/LTC6242 2.8V to ±5.5V LTC6240HV/LTC6241HV/LTC6242HV Low Input Capacitance H-Grade Temperature Range: –40°C to 125°C Single LTC6240 in 5-Pin Low Profile (1mm) ThinSOT™ Package and 8-Pin SO for PCB Guard Ring Dual LTC6241 in 8-Pin SO and Tiny DFN Packages Quad LTC6242 in 16-Pin SSOP and 5mm × 3mm DFN Packages

High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation Features: High Power Switching Regulator Controller for 3.3V-5V to 1.xV-3.xV Step-Down Applications No Current Sense Resistor Required Low Input Supply Voltage Range: 3V to 8V Maximum Duty Cycle >91% Over Temperature All N-Channel External MOSFETs Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations High Efficiency: Over 95% Possible Adjustable or Fixed 3.3V Output (16-Pin Version) Programmable Fixed Frequency Operation: 100kHz to 500kHz External Clock Synchronization Soft-Start (16-Pin Version and LTC3830-1) Low Shutdown Current: <10µA Overtemperature Protection Available in S8, S16 and SSOP-16 Packages

High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation Features: High Power Switching Regulator Controller for 3.3V-5V to 1.xV-3.xV Step-Down Applications No Current Sense Resistor Required Low Input Supply Voltage Range: 3V to 8V Maximum Duty Cycle >91% Over Temperature All N-Channel External MOSFETs Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations High Efficiency: Over 95% Possible Adjustable or Fixed 3.3V Output (16-Pin Version) Programmable Fixed Frequency Operation: 100kHz to 500kHz External Clock Synchronization Soft-Start (16-Pin Version and LTC3830-1) Low Shutdown Current: <10µA Overtemperature Protection Available in S8, S16 and SSOP-16 Packages

High Power Synchronous Switching Regulator Controller for DDR Memory Termination Features: High Power Switching Regulator Controller for DDR Memory Termination VOUT Tracks 1/2 of VIN or External VREF No Current Sense Resistor Required Low Input Supply Voltage Range: 3V to 8V Maximum Duty Cycle >91% Over Temperature Drives All N-Channel External MOSFETs High Efficiency: Over 95% Possible Programmable Fixed Frequency Operation: 100kHz to 500kHz External Clock Synchronization Operation Programmable Soft-Start Low Shutdown Current: <10µA Overtemperature Protection Available in 16-Pin Narrow SSOP Package

Fast Accurate Step-Down DC/DC Controller with Differential Output Sensing Features: Wide VIN Range: 4.5V to 38V VOUT Range: 0.6V to 5.5V Output Accuracy: ±0.25% at 25°C and ±0.67% over Temperature Differential Output Sensing Allowing Up to 500mV Line Loss Fast Load Transient Response tON(MIN) = 20ns, tOFF(MIN) = 90ns Controlled On-Time Valley Current Mode Architecture Frequency Programmable from 200kHz to 2MHz and Synchronizable to External Clock RSENSE or Inductor DCR Current Sensing Overvoltage Protection and Current Limit Foldback Power Good Output Voltage Monitor Output Tracking or Adjustable Soft-Start External VCC Input for Bypassing Internal LDO 20-Pin QFN (3mm × 4mm) and TSSOP Packages

Fast Accurate Step-Down DC/DC Controller with Differential Output Sensing Features: Wide VIN Range: 4.5V to 38V VOUT Range: 0.6V to 5.5V Output Accuracy: ±0.25% at 25°C and ±0.67% over Temperature Differential Output Sensing Allowing Up to 500mV Line Loss Fast Load Transient Response tON(MIN) = 20ns, tOFF(MIN) = 90ns Controlled On-Time Valley Current Mode Architecture Frequency Programmable from 200kHz to 2MHz and Synchronizable to External Clock RSENSE or Inductor DCR Current Sensing Overvoltage Protection and Current Limit Foldback Power Good Output Voltage Monitor Output Tracking or Adjustable Soft-Start External VCC Input for Bypassing Internal LDO 20-Pin QFN (3mm × 4mm) and TSSOP Packages

30A IQ Synchronous Step-Down Controller Features: Wide Output Voltage Range: 0.8V VOUT 10V Low Operating IQ: 30μA OPTI-LOOP® Compensation Minimizes COUT ±1% Output Voltage Accuracy Wide VIN Range: 4V to 36V Phase-Lockable Fixed Frequency 140kHz to 650kHz Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Output Current Foldback Limiting Output Overvoltage Protection Low Shutdown IQ: 4μA Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads Small 16-Lead Narrow SSOP or 5mm × 3mm DFN Package

30A IQ Synchronous Step-Down Controller Features: Wide Output Voltage Range: 0.8V VOUT 10V Low Operating IQ: 30μA OPTI-LOOP® Compensation Minimizes COUT ±1% Output Voltage Accuracy Wide VIN Range: 4V to 36V Phase-Lockable Fixed Frequency 140kHz to 650kHz Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Output Current Foldback Limiting Output Overvoltage Protection Low Shutdown IQ: 4μA Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads Small 16-Lead Narrow SSOP or 5mm × 3mm DFN Package

30A IQ Synchronous Step-Down Controller Features: Wide Output Voltage Range: 0.8V VOUT 10V Low Operating IQ: 30μA OPTI-LOOP® Compensation Minimizes COUT ±1% Output Voltage Accuracy Wide VIN Range: 4V to 36V Phase-Lockable Fixed Frequency 140kHz to 650kHz Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Output Current Foldback Limiting Output Overvoltage Protection Low Shutdown IQ: 4μA Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads Small 16-Lead Narrow SSOP or 5mm × 3mm DFN Package

Low IQ Synchronous Step-Down Controller Features: Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V Low Operating Quiescent Current: 80μA OPTI-LOOP® Compensation Minimizes COUT 1% Output Voltage Accuracy Wide VIN Range: 4V to 36V Operation Phase-Lockable Fixed Frequency 140kHz to 650kHz Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Output Current Foldback Limiting Power Good Output Voltage Monitor Clock Output for PolyPhase® Applications Output Overvoltage Protection Low Shutdown IQ: 10μA Internal LDO Powers Gate Drive from VIN or VOUT Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads Small 20-Lead TSSOP or 4mm × 5mm QFN Package AEC-Q100 Qualified for Automotive Applications

Low IQ Synchronous Step-Down Controller Features: Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V Low Operating Quiescent Current: 80μA OPTI-LOOP® Compensation Minimizes COUT 1% Output Voltage Accuracy Wide VIN Range: 4V to 36V Operation Phase-Lockable Fixed Frequency 140kHz to 650kHz Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Output Current Foldback Limiting Power Good Output Voltage Monitor Clock Output for PolyPhase® Applications Output Overvoltage Protection Low Shutdown IQ: 10μA Internal LDO Powers Gate Drive from VIN or VOUT Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads Small 20-Lead TSSOP or 4mm × 5mm QFN Package AEC-Q100 Qualified for Automotive Applications

Low IQ Synchronous Step-Down Controller Features: Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V Low Operating Quiescent Current: 80μA OPTI-LOOP® Compensation Minimizes COUT 1% Output Voltage Accuracy Wide VIN Range: 4V to 36V Operation Phase-Lockable Fixed Frequency 140kHz to 650kHz Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Output Current Foldback Limiting Power Good Output Voltage Monitor Clock Output for PolyPhase® Applications Output Overvoltage Protection Low Shutdown IQ: 10μA Internal LDO Powers Gate Drive from VIN or VOUT Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads Small 20-Lead TSSOP or 4mm × 5mm QFN Package AEC-Q100 Qualified for Automotive Applications

Dual 2-Phase, No RSENSE Low VIN Synchronous Controller Features: No Current Sense Resistors Required Out-of-Phase Controllers Reduce Required Input Capacitance All N-Channel Synchronous Drive VIN Range: 2.75V to 4.5V Constant-Frequency Current Mode Operation 0.6V ±1.5% Voltage Reference Low Dropout Operation: 97% Duty Cycle True PLL for Frequency Locking or Adjustment Selectable Pulse-Skipping/Continuous Operation Tracking Function Internal Soft-Start Circuitry Power Good Output Voltage Monitor Output Overvoltage Protection Micropower Shutdown: IQ = 6.5µA Tiny Low Profile (4mm × 5mm) QFN and Narrow SSOP Packages

Dual 2-Phase, No RSENSE Low VIN Synchronous Controller Features: No Current Sense Resistors Required Out-of-Phase Controllers Reduce Required Input Capacitance All N-Channel Synchronous Drive VIN Range: 2.75V to 4.5V Constant-Frequency Current Mode Operation 0.6V ±1.5% Voltage Reference Low Dropout Operation: 97% Duty Cycle True PLL for Frequency Locking or Adjustment Selectable Pulse-Skipping/Continuous Operation Tracking Function Internal Soft-Start Circuitry Power Good Output Voltage Monitor Output Overvoltage Protection Micropower Shutdown: IQ = 6.5µA Tiny Low Profile (4mm × 5mm) QFN and Narrow SSOP Packages

Dual, Fast, Accurate Step- Down DC/DC Controller with Differential Output Sensing Features:Wide VIN Range: 4.5V to 38V, VOUT: 0.6V to 5.5V±0.67% Output Voltage Accuracy Over Temperature, Differential Output Voltage Sensing, Allowing Up to ±500mV Line Loss at Remote Ground on Channel 1±1% Output on the Independent 2nd ChannelControlled On-Time, Valley Current Mode ControlFast Load Transient ResponseDetect Transient (DTR) Reduces VOUT OvershootFrequency Programmable from 200kHz to 2MHz, Synchronizable to External ClocktON(MIN) = 30ns, tOFF(MIN) = 90nsRSENSE or Inductor DCR Current SensingOvervoltage Protection and Current Limit FoldbackPower Good Output Voltage MonitorOutput Voltage Tracking and Adjustable Soft Start-UpThermally Enhanced 38-Pin (5mm × 7mm) QFN and TSSOP packages

Dual, 2-Phase Synchronous Step-Down Switching Controller Features: Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise High Efficiency: Up to 95% RSENSE or DCR Current Sensing ±1% 0.8V Output Voltage Accuracy Phase-Lockable Fixed Frequency 250kHz to 780kHz Supports Pre-Biased Output Dual N-Channel MOSFET Synchronous Drive Wide VIN Range: 4V to 24V (30V for LTC3850I) Operation Adjustable Soft-Start Current Ramping or Tracking Foldback Output Current Limiting Power Good Output Voltage Monitor 28-Pin 4mm × 4mm, 4mm × 5mm QFN and Narrow SSOP Packages AEC-Q100 Qualified for Automotive Applications

Dual, 2-Phase Synchronous Step-Down Switching Controller Features: Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise High Efficiency: Up to 95% RSENSE or DCR Current Sensing ±1% 0.8V Output Voltage Accuracy Phase-Lockable Fixed Frequency 250kHz to 780kHz Supports Pre-Biased Output Dual N-Channel MOSFET Synchronous Drive Wide VIN Range: 4V to 24V (30V for LTC3850I) Operation Adjustable Soft-Start Current Ramping or Tracking Foldback Output Current Limiting Power Good Output Voltage Monitor 28-Pin 4mm × 4mm, 4mm × 5mm QFN and Narrow SSOP Packages AEC-Q100 Qualified for Automotive Applications

Dual, 2-Phase Synchronous Step-Down Switching Controller Features: Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise High Efficiency: Up to 95% RSENSE or DCR Current Sensing ±1% 0.8V Output Voltage Accuracy Phase-Lockable Fixed Frequency 250kHz to 780kHz Supports Pre-Biased Output Dual N-Channel MOSFET Synchronous Drive Wide VIN Range: 4V to 24V (30V for LTC3850I) Operation Adjustable Soft-Start Current Ramping or Tracking Foldback Output Current Limiting Power Good Output Voltage Monitor 28-Pin 4mm × 4mm, 4mm × 5mm QFN and Narrow SSOP Packages AEC-Q100 Qualified for Automotive Applications

Synchronous Step-Down Switching Regulator Controller Features: Wide VIN Range: 4V to 38V Operation RSENSE or DCR Current Sensing ±1% Output Voltage Accuracy Phase-Lockable Fixed Frequency: 250kHz to 750kHz Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Adjustable Output Voltage Soft-Start or Tracking Output Current Foldback Limiting Output Overvoltage Protection 5V Internal Regulator OPTI-LOOP® Compensation Minimizes COUT Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads Low Shutdown IQ: 20μA VOUT Range: 0.8V to 5.5V Thermally Enhanced 16-Lead MSOP, 16-Lead Narrow SSOP or 3mm × 3mm QFN Package