LT3692A Series

Monolithic Dual Tracking 3.5A Step-Down Switching Regulator

Catalog

Monolithic Dual Tracking 3.5A Step-Down Switching Regulator

Part	Voltage - Input (Min) [Min]	Mounting Type	Topology	Number of Outputs	Frequency - Switching [Max]	Frequency - Switching [Min]	Supplier Device Package	Current - Output	Voltage - Output (Max) [Max]	Output Type	Voltage - Output (Min/Fixed)	Function	Voltage - Input (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Package / Case
Analog Devices LT3692EUH#TRPBF	3 V	Surface Mount	Buck	2	2.5 MHz	110 kHz	32-QFN (5x5)	3.5 A	34.2 V	Adjustable	0.8 V	Step-Down	36 V	-40 °C	125 ¯C	Positive
Analog Devices LT3692AHFE#PBF	3 V	Surface Mount	Buck	2	2.5 MHz	110 kHz	38-TSSOP-EP	3.5 A	34.2 V	Adjustable	0.8 V	Step-Down	36 V	-40 °C	150 °C	Positive	38-TFSOP
Analog Devices LT3692AHUH#TRPBF	3 V	Surface Mount	Buck	2	2.5 MHz	110 kHz	32-QFN (5x5)	3.5 A	34.2 V	Adjustable	0.8 V	Step-Down	36 V	-40 °C	150 °C	Positive
Analog Devices LT3692AEUH#PBF	3 V	Surface Mount	Buck	2	2.5 MHz	110 kHz	32-QFN (5x5)	3.5 A	34.2 V	Adjustable	0.8 V	Step-Down	36 V	-40 °C	125 ¯C	Positive
Analog Devices LT3692AEFE	3 V	Surface Mount	Buck	2	2.5 MHz	110 kHz	38-TSSOP-EP	3.5 A	34.2 V	Adjustable	0.8 V	Step-Down	36 V	-40 °C	125 ¯C	Positive	38-TFSOP
Analog Devices LT3692AEUH#TRPBF	3 V	Surface Mount	Buck	2	2.5 MHz	110 kHz	32-QFN (5x5)	3.5 A	34.2 V	Adjustable	0.8 V	Step-Down	36 V	-40 °C	125 ¯C	Positive
Analog Devices LT3692AIFE#PBF	3 V	Surface Mount	Buck	2	2.5 MHz	110 kHz	38-TSSOP-EP	3.5 A	34.2 V	Adjustable	0.8 V	Step-Down	36 V	-40 °C	125 ¯C	Positive	38-TFSOP

Catalog

Monolithic Dual Tracking 3.5A Step-Down Switching Regulator

Key Features

• Wide Input Range:

• Operation from 3V to 36V

• OVLO Protects Circuit Through 60V Transients

• Independent Supply, Shutdown, Soft-Start, UVLO, Programmable Current Limit and Programmable Power Good for Each 3.5A Regulator

• Die Temperature Monitor

• Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.25MHz with Synchronized Clock Output

• Independent Synchronized Switching Frequencies Optimize Component Size

• Antiphase Switching

• Outputs Can Be Paralleled

• Flexible Output Voltage Tracking

• Low Dropout: 95% Maximum Duty Cycle

• 5mm × 5mm QFN Package

• FMEA Compliant 38-Pin Exposed Pad TSSOP Package

Description

The LT3692A is a dual current mode PWM step-down DC/DC converter with two internal 3.8A switches. Independent input voltage, shutdown, feedback, soft-start, UVLO current limit and comparator pins for each channel simplify complex power supply tracking and sequencing requirements.To optimize efficiency and component size, both converters have a programmable maximum current limit and are synchronized to either a common external clock input, or a resistor settable fixed 250kHz to 2.25MHz internal oscillator. A frequency divider is provided for channel 1 to further optimize component size. At all frequencies, a 180° phase relationship between channels is maintained, reducing voltage ripple and component size. A clock output is available for synchronizing multiple regulators.Minimum input to output voltage ratios are improved by allowing the switch to stay on through multiple clock cycles only switching off when the boost capacitor needs recharging. Independent channel operation can be programmed using the SHDN pin. Disabling both converters reduces the total quiescent current to <10μA.The LT3692A is an improved version of the LT3692 with reduced minimum on-time.Min On-TimeFeaturesPackageLT3692180ns-5 × 5 QFN-32LT3692A140nsProgrammable Shutdown UVLOTSSOP-38E, 5 × 5 QFN-32ApplicationsAutomotive SuppliesDistributed Supply Regulation