Specification	LT3091IDE#PBF

Control Features	Enable, Current Limit
Current - Output	1.5 A
Current - Quiescent (Iq)	50.5 µA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Negative
Output Type	Adjustable
Package / Case	14-WFDFN Exposed Pad
Protection Features	Over Current, Reverse Polarity, Short Circuit, Over Temperature
PSRR [Max]	20 dB
PSRR [Min]	85 dB
Supplier Device Package	14-DFN (4x3)
Voltage - Input (Max) [Max]	-36 V
Voltage - Output (Max) [Max]	-32 V
Voltage - Output (Min/Fixed)	0 V
Voltage Dropout (Max) [Max]	0.45 V

LT3091 Series

–36V, 1.5A Negative Linear Regulator with Programmable Current Limit

Part	Mounting Type	Output Type	Current - Output	Supplier Device Package	Package / Case	PSRR [Max]	PSRR [Min]	Control Features	Voltage - Output (Max) [Max]	Protection Features	Number of Regulators	Voltage Dropout (Max) [Max]	Voltage - Input (Max) [Max]	Output Configuration	Current - Quiescent (Iq)	Operating Temperature [Min]	Operating Temperature [Max]
Analog Devices Inc./Maxim Integrated LT3091HR#PBF	Surface Mount	Adjustable	1.5 A	DDPAK-7	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.525 V	-36 V	Negative	50.5 µA	-40 C	150 °C
Analog Devices Inc./Maxim Integrated LT3091EDE#PBF	Surface Mount	Adjustable	1.5 A	14-DFN (4x3)	14-WFDFN Exposed Pad	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.45 V	-36 V	Negative	50.5 µA	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3091IDE#TRPBF	Surface Mount	Adjustable	1.5 A	14-DFN (4x3)	14-WFDFN Exposed Pad	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.45 V	-36 V	Negative	50.5 µA	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3091MPDE#TRPBF	Surface Mount	Adjustable	1.5 A	14-DFN (4x3)	14-WFDFN Exposed Pad	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.45 V	-36 V	Negative	50.5 µA	-55 C	150 °C
Analog Devices Inc./Maxim Integrated LT3091ET7#PBF	Through Hole	Adjustable	1.5 A	TO-220-7	TO-220-7 Formed Leads	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.525 V	-36 V	Negative	50.5 µA	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3091IDE#PBF	Surface Mount	Adjustable	1.5 A	14-DFN (4x3)	14-WFDFN Exposed Pad	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.45 V	-36 V	Negative	50.5 µA	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3091EFE#TRPBF	Surface Mount	Adjustable	1.5 A	16-TSSOP-EP	16-TSSOP (0.173" 4.40mm Width) Exposed Pad	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.45 V	-36 V	Negative	50.5 µA	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3091MPR#PBF	Surface Mount	Adjustable	1.5 A	DDPAK-7	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.525 V	-36 V	Negative	50.5 µA	-55 C	150 °C
Analog Devices Inc./Maxim Integrated LT3091IR#TRPBF	Surface Mount	Adjustable	1.5 A	DDPAK-7	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.525 V	-36 V	Negative	50.5 µA	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3091MPT7#PBF	Through Hole	Adjustable	1.5 A	TO-220-7	TO-220-7 Formed Leads	20 dB	85 dB	Current Limit Enable	-32 V	Over Current Over Temperature Reverse Polarity Short Circuit	1	0.525 V	-36 V	Negative	50.5 µA	-55 C	150 °C

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	459	$ 10.65	1m+

Description

General part information

LT3091 Series

The LT3091 is a 1.5A, low dropout negative linear regulator that is easily paralleled to increase output current or spread heat on surface mounted boards. Designed with a precision current reference followed by a high performance rail-to-rail voltage buffer, this regulator finds use in applications requiring precision output, high current with no heat sink, output adjustability to zero and low dropout voltage. The device can also be configured as a 3-terminal floating regulator.The LT3091 features fast transient response, high PSRR and output noise as low as 18μVRMS. The LT3091 generates a wide output voltage range (0V to –32V) while maintaining unity gain operation. This yields virtually constant bandwidth, load regulation, PSRR and noise, independent of the programmed output voltage.The LT3091 supplies 1.5A at a typical dropout voltage of 300mV. Operating quiescent current is nominally 1.2mA and drops to << 1μA in shutdown. A single resistor adjusts the LT3091’s precision programmable current limit. The device’s positive or negative current monitor either sources a current (0.25mA/A) or sinks a current (0.5mA/A) proportional to output current. Built-in protection includes reverse output protection, internal current limit with foldback and thermal shutdown with hysteresis.ApplicationsPost Regulator for Switching SuppliesLow Noise Instrumentation and RF SuppliesRugged Industrial SuppliesPrecision Power Supplies

Documents

Technical documentation and resources

R531 Reliability Data

Reliability Data

LT3091IDE#PBF | Datasheet

Datasheet