300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Features: Dropout Voltage: 0.5V Output Current: 300mA Quiescent Current: 12µA No Protection Diodes Needed Adjustable Output from 3.8V to 20V Fixed Output Voltages: 3V, 3.3V, 5V Controlled Quiescent Current in Dropout Shutdown IQ = 6µA Reverse Battery Protection No Reverse Current Thermal Limiting

300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Features: Dropout Voltage: 0.5V Output Current: 300mA Quiescent Current: 12µA No Protection Diodes Needed Adjustable Output from 3.8V to 20V Fixed Output Voltages: 3V, 3.3V, 5V Controlled Quiescent Current in Dropout Shutdown IQ = 6µA Reverse Battery Protection No Reverse Current Thermal Limiting

300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Features: Dropout Voltage: 0.5V Output Current: 300mA Quiescent Current: 12µA No Protection Diodes Needed Adjustable Output from 3.8V to 20V Fixed Output Voltages: 3V, 3.3V, 5V Controlled Quiescent Current in Dropout Shutdown IQ = 6µA Reverse Battery Protection No Reverse Current Thermal Limiting

300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Features: Dropout Voltage: 0.5V Output Current: 300mA Quiescent Current: 12µA No Protection Diodes Needed Adjustable Output from 3.8V to 20V Fixed Output Voltages: 3V, 3.3V, 5V Controlled Quiescent Current in Dropout Shutdown IQ = 6µA Reverse Battery Protection No Reverse Current Thermal Limiting

300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Features: Dropout Voltage: 0.5V Output Current: 300mA Quiescent Current: 12µA No Protection Diodes Needed Adjustable Output from 3.8V to 20V Fixed Output Voltages: 3V, 3.3V, 5V Controlled Quiescent Current in Dropout Shutdown IQ = 6µA Reverse Battery Protection No Reverse Current Thermal Limiting

3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown Features: Dropout Voltage: 0.6V at IOUT = 3A Output Current: 3A Quiescent Current: 50µA No Protection Diodes Needed Adjustable Output from 3.8V to 14V 3.3V and 5V Fixed Output Voltages Controlled Quiescent Current in Dropout Shutdown IQ = 16µA Stable with 22µF Output Capacitor Reverse Battery Protection No Reverse Current Thermal Limiting

Very Low Noise, High Frequency Active RC, Filter Building Block Features: Up to 10MHz Center Frequency on a Single 3V Supply Easy to Use—A Single Resistor Value Sets Lowpass Cutoff Frequency (200kHz <  fC < 5MHz), Unequal Resistor Values Extend Cutoff Frequency Up to 10MHz Extremely Flexible—Different Resistor Values Allow Lowpass Transfer Functions with or Without Gain SNR = 92dB (fC = 2MHz, 2VP-P) THD = –84dB (fC = 2MHz, 1VP-P) Internal Capacitors Trimmed to ±0.75% Single 4-Pole Lowpass Filter or Matched Pair of 2-Pole Lowpass Filters Can be Connected as a Bandpass Filter Single-Ended or Differential Output Operates from Single 3V (2.7V Min) to ±5V Supply Rail-to-Rail Input and Output Voltages

Very Low Noise, High Frequency Active RC, Filter Building Block Features: Up to 10MHz Center Frequency on a Single 3V Supply Easy to Use—A Single Resistor Value Sets Lowpass Cutoff Frequency (200kHz <  fC < 5MHz), Unequal Resistor Values Extend Cutoff Frequency Up to 10MHz Extremely Flexible—Different Resistor Values Allow Lowpass Transfer Functions with or Without Gain SNR = 92dB (fC = 2MHz, 2VP-P) THD = –84dB (fC = 2MHz, 1VP-P) Internal Capacitors Trimmed to ±0.75% Single 4-Pole Lowpass Filter or Matched Pair of 2-Pole Lowpass Filters Can be Connected as a Bandpass Filter Single-Ended or Differential Output Operates from Single 3V (2.7V Min) to ±5V Supply Rail-to-Rail Input and Output Voltages

Constant-Current/Constant-Voltage Battery Charger with Preset Voltage and Termination Flag Features: Fast Charging of Li-Ion, NiMH and NiCd Batteries Simple Charge Current Programming Requires Only One Low Cost, 1/32W Resistor High Efficiency Charger with Up to 1.5A Charge Current Precision 0.6% Internal Voltage Reference Preset Battery Voltages: 4.1V, 4.2V, 8.2V, 8.4V 500kHz or 200kHz Switching Frequency Minimizes Charger Size Low Reverse Battery Drain Current: 5µA Flag Indicates Li-Ion Charge Completion 5% Typical Charge Current Accuracy Low Shutdown Current LT1571-1: 200kHz, Adjustable Voltage LT1571-2: 200kHz, Fixed 8.2V or 8.4V LT1571-5: 500kHz, Fixed 4.1V or 4.2V

Ultrafast Transient Response, Low Dropout Regulators Adjustable and Fixed Features: UltraFast™ Transient Response Eliminates Tantalum and Electrolytic Output Capacitors FET RDS(ON) Defines Dropout Voltage 1% Reference/Output Voltage Tolerance Temperature Typical Load Regulation: 1mV High Side Sense Current Limit Multifunction Shutdown Pin with Latch off

Ultrafast Transient Response, Low Dropout Regulators Adjustable and Fixed Features: UltraFast™ Transient Response Eliminates Tantalum and Electrolytic Output Capacitors FET RDS(ON) Defines Dropout Voltage 1% Reference/Output Voltage Tolerance Temperature Typical Load Regulation: 1mV High Side Sense Current Limit Multifunction Shutdown Pin with Latch off

Ultrafast Transient Response, Low Dropout Regulators Adjustable and Fixed Features: UltraFast™ Transient Response Eliminates Tantalum and Electrolytic Output Capacitors FET RDS(ON) Defines Dropout Voltage 1% Reference/Output Voltage Tolerance Temperature Typical Load Regulation: 1mV High Side Sense Current Limit Multifunction Shutdown Pin with Latch off

1.5A, 200kHz Step-Down Switching Regulator Features: Constant 200kHz Switching Frequency 1.21V Reference Voltage Fixed 5V Output Option Easily Synchronizable Uses All Surface Mount Components Inductor Size Reduced to 15µH Saturating Switch Design: 0.2Ω Effective Supply Current: 1.16mA Shutdown Current: 20µA Cycle-by-Cycle Current Limiting Fused Lead SO-8 Package

1.5A, 200kHz Step-Down Switching Regulator Features: Constant 200kHz Switching Frequency 1.21V Reference Voltage Fixed 5V Output Option Easily Synchronizable Uses All Surface Mount Components Inductor Size Reduced to 15µH Saturating Switch Design: 0.2Ω Effective Supply Current: 1.16mA Shutdown Current: 20µA Cycle-by-Cycle Current Limiting Fused Lead SO-8 Package

1.5A, 200kHz Step-Down Switching Regulator Features: Constant 200kHz Switching Frequency 1.21V Reference Voltage Fixed 5V Output Option Easily Synchronizable Uses All Surface Mount Components Inductor Size Reduced to 15µH Saturating Switch Design: 0.2Ω Effective Supply Current: 1.16mA Shutdown Current: 20µA Cycle-by-Cycle Current Limiting Fused Lead SO-8 Package

1.5A, 200kHz Step-Down Switching Regulator Features: Constant 200kHz Switching Frequency 1.21V Reference Voltage Fixed 5V Output Option Easily Synchronizable Uses All Surface Mount Components Inductor Size Reduced to 15µH Saturating Switch Design: 0.2Ω Effective Supply Current: 1.16mA Shutdown Current: 20µA Cycle-by-Cycle Current Limiting Fused Lead SO-8 Package

1.5A, 200kHz Step-Down Switching Regulator Features: 1.5A Switch Current High Efficiency—Low Loss 0.2Ω Switch Constant 200kHz Switching Frequency 4V to 15V Input Voltage Range Minimum Output: 1.21V Low Supply Current: 1.9mA Low Shutdown Current: 20µA Easily Synchronizable Up to 400kHz Cycle-by-Cycle Current Limit Reduced EMI Generation Low Thermal Resistance SO-8 Package Uses Small Low Value Inductors

300mA Dual Input Smart Battery Backup Regulator Features: Maintains Output Regulation with Dual Inputs Dropout Voltage: 0.4V Output Current: 300mA 50µA Quiescent Current No Protection Diodes Needed Two Low-Battery Comparators Status Flags Aid Power Management Adjustable Output from 1.5V to 20V Fixed Output Voltages: 3V, 3.3V and 5V 7µA Quiescent Current in Shutdown Reverse-Battery Protection Reverse Current Protection Remove, Recharge and Replace Batteries Without Loss of Regulation

300mA Dual Input Smart Battery Backup Regulator Features: Maintains Output Regulation with Dual Inputs Dropout Voltage: 0.4V Output Current: 300mA 50µA Quiescent Current No Protection Diodes Needed Two Low-Battery Comparators Status Flags Aid Power Management Adjustable Output from 1.5V to 20V Fixed Output Voltages: 3V, 3.3V and 5V 7µA Quiescent Current in Shutdown Reverse-Battery Protection Reverse Current Protection Remove, Recharge and Replace Batteries Without Loss of Regulation

300mA Dual Input Smart Battery Backup Regulator Features: Maintains Output Regulation with Dual Inputs Dropout Voltage: 0.4V Output Current: 300mA 50µA Quiescent Current No Protection Diodes Needed Two Low-Battery Comparators Status Flags Aid Power Management Adjustable Output from 1.5V to 20V Fixed Output Voltages: 3V, 3.3V and 5V 7µA Quiescent Current in Shutdown Reverse-Battery Protection Reverse Current Protection Remove, Recharge and Replace Batteries Without Loss of Regulation