Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages Features: Monitors Three Inputs Simultaneously LTC1727-5: 5V, 3.3V and ADJ LTC1727-2.5: 2.5V, 3.3V and ADJ LTC1728-5: 5V, 3.3V and ADJ LTC1728-2.5: 2.5V, 3.3V and ADJ LTC1728-1.8: 3V, 1.8V and ADJ LTC1728-3.3: 3.3V, 1.8V and ADJ ±1.5% Threshold Accuracy Over Temperature Very Low Supply Current: 10µA Typ 200ms Reset Time Delay Active Low RESET Output Power Supply Glitch Immunity Guaranteed RESET for VCC3 ≥ 1V or VCC5/VCC25/VCC18 ≥ 1V LTC1727 Includes Monitor Output for Each Supply LTC1727: 8-Lead MSOP and SO Packages LTC1728: 5-Lead SOT-23 Package

Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages Features: Monitors Three Inputs Simultaneously LTC1727-5: 5V, 3.3V and ADJ LTC1727-2.5: 2.5V, 3.3V and ADJ LTC1728-5: 5V, 3.3V and ADJ LTC1728-2.5: 2.5V, 3.3V and ADJ LTC1728-1.8: 3V, 1.8V and ADJ LTC1728-3.3: 3.3V, 1.8V and ADJ ±1.5% Threshold Accuracy Over Temperature Very Low Supply Current: 10µA Typ 200ms Reset Time Delay Active Low RESET Output Power Supply Glitch Immunity Guaranteed RESET for VCC3 ≥ 1V or VCC5/VCC25/VCC18 ≥ 1V LTC1727 Includes Monitor Output for Each Supply LTC1727: 8-Lead MSOP and SO Packages LTC1728: 5-Lead SOT-23 Package

Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages Features: Monitors Three Inputs Simultaneously LTC1727-5: 5V, 3.3V and ADJ LTC1727-2.5: 2.5V, 3.3V and ADJ LTC1728-5: 5V, 3.3V and ADJ LTC1728-2.5: 2.5V, 3.3V and ADJ LTC1728-1.8: 3V, 1.8V and ADJ LTC1728-3.3: 3.3V, 1.8V and ADJ ±1.5% Threshold Accuracy Over Temperature Very Low Supply Current: 10µA Typ 200ms Reset Time Delay Active Low RESET Output Power Supply Glitch Immunity Guaranteed RESET for VCC3 ≥ 1V or VCC5/VCC25/VCC18 ≥ 1V LTC1727 Includes Monitor Output for Each Supply LTC1727: 8-Lead MSOP and SO Packages LTC1728: 5-Lead SOT-23 Package

Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages Features: Monitors Three Inputs Simultaneously LTC1727-5: 5V, 3.3V and ADJ LTC1727-2.5: 2.5V, 3.3V and ADJ LTC1728-5: 5V, 3.3V and ADJ LTC1728-2.5: 2.5V, 3.3V and ADJ LTC1728-1.8: 3V, 1.8V and ADJ LTC1728-3.3: 3.3V, 1.8V and ADJ ±1.5% Threshold Accuracy Over Temperature Very Low Supply Current: 10µA Typ 200ms Reset Time Delay Active Low RESET Output Power Supply Glitch Immunity Guaranteed RESET for VCC3 ≥ 1V or VCC5/VCC25/VCC18 ≥ 1V LTC1727 Includes Monitor Output for Each Supply LTC1727: 8-Lead MSOP and SO Packages LTC1728: 5-Lead SOT-23 Package

Wide Operating Range, No RSENSETM Step-Down DC/DC Controller with SMBus Programming Features: SMBus/I²C™ Programmable Output Voltage: 1.3V to 3.5V No Sense Resistor Required 2% to 90% Duty Cycle at 200kHz tON(MIN) </= 100ns True Current Mode Control Stable with Ceramic COUT Power Good Output Voltage Monitor and 50µs Timer Wide VIN Range: 4V to 36V (Abs Max) Precision Resistor Divider and Reference Provide ±1.35% Output Voltage Accuracy Over Temperature Adjustable Switching Frequency and Current Limit Forced Continuous Control Pin Programmable Soft-Start Output Overvoltage Protection Optional Short-Circuit Shutdown Timer Available in a 28-Lead SSOP Package

Switched Capacitor Regulated Voltage Inverter Features: Regulated Negative Voltage from a Single Positive Supply REG Pin Indicates Output is in Regulation Adjustable or Fixed Output Voltages Output Regulation: ±3.5% Supply Current: 650µA Typ Shutdown Mode Drops Supply Current to 5µA Up to 20mA Output Current Requires Only Three or Four External Capacitors Available in MS8 and SO-8 Packages

Switched Capacitor Regulated Voltage Inverter Features: Regulated Negative Voltage from a Single Positive Supply REG Pin Indicates Output is in Regulation Adjustable or Fixed Output Voltages Output Regulation: ±3.5% Supply Current: 650µA Typ Shutdown Mode Drops Supply Current to 5µA Up to 20mA Output Current Requires Only Three or Four External Capacitors Available in MS8 and SO-8 Packages

12V, 30mA Flash Memory Programming Supply Features: Regulated 12V ±5% Output Voltage No Inductors Supply Voltage Range: 4.75V to 5.5V Guaranteed 30mA Output Low Power: Icc = 500µA Icc in Shutdown: 0.5µA 8-Pin PDIP or SO-8 Package

Synchronous Regulator Controller for N- or P-Channel MOSFETs Features: Ultrahigh Efficiency: Over 95% Possible Drives N-Channel MOSFET for High Current or P-Channel MOSFET for Low Dropout Pin Selectable Burst Mode Operation 1% Output Accuracy (LTC1266A) Pin Selectable Phase of Topside Driver for Boost or Step-Down Operation Wide VIN Range: 3.5V to 20V On-Chip Low-Battery Detector High Efficiency Maintained Over Large Current Range Low 170µA Standby Current at Light Loads Current Mode Operation for Excellent Line and Load Transient Response Logic Controlled Micropower Shutdown: IQ < 40µA Short-Circuit Protection Synchronous Switching with Nonoverlaping Gate Drives Available in 16-Pin Narrow SO Package

Synchronous Regulator Controller for N- or P-Channel MOSFETs Features: Ultrahigh Efficiency: Over 95% Possible Drives N-Channel MOSFET for High Current or P-Channel MOSFET for Low Dropout Pin Selectable Burst Mode Operation 1% Output Accuracy (LTC1266A) Pin Selectable Phase of Topside Driver for Boost or Step-Down Operation Wide VIN Range: 3.5V to 20V On-Chip Low-Battery Detector High Efficiency Maintained Over Large Current Range Low 170µA Standby Current at Light Loads Current Mode Operation for Excellent Line and Load Transient Response Logic Controlled Micropower Shutdown: IQ < 40µA Short-Circuit Protection Synchronous Switching with Nonoverlaping Gate Drives Available in 16-Pin Narrow SO Package