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LT3094IMSE#TRPBF

IC REG LIN NEG ADJ 500MA 12MSOP

Part Number: LT3094IMSE#TRPBF

Manufacturer: Analog Devices Inc.

Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package: 12-TSSOP (0.118", 3.00mm Width) Exposed Pad

Datasheet:: LT3094IMSE#TRPBF.pdf

Description: IC REG LIN NEG ADJ 500MA 12MSOP

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

LT3094IMSE#TRPBF -20V, 500mA, Ultralow Noise, Ultrahigh PSRR Negative Linear Regulator

A comprehensive technical overview of the LT3094IMSE#TRPBF, a high-performance low dropout negative linear regulator from Analog Devices featuring ultralow noise and ultrahigh PSRR architecture. Covers device function, core features, electrical specifications, 12-lead MSOP package, pin configuration, typical applications, and replacement selection guidance.

Analog Devices 12-Lead MSOP (MSE) -1.8V to -20V Input

Device Classification Ultralow Noise Negative Linear Regulator

Part Number: LT3094IMSE#TRPBF

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +125°C

PRODUCT OVERVIEW

What Is the LT3094IMSE#TRPBF?

LT3094IMSE#TRPBF is a high performance low dropout negative linear regulator from Analog Devices featuring ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applications.[reference:0] The device supplies 500mA at a typical 235mV dropout voltage.[reference:1] Operating quiescent current is nominally 2.35mA and drops to 3µA in shutdown.[reference:2]

The device's wide output voltage range (0V to –19.5V) error amplifier operates in unity-gain and provides virtually constant output noise, PSRR, bandwidth, and load regulation independent of the programmed output voltage.[reference:3] The regulator incorporates a tracking function to control an upstream supply to maintain a constant voltage across the LT3094 to minimize power dissipation and optimize PSRR.[reference:4]

The LT3094IMSE#TRPBF is stable with a minimum 10µF ceramic output capacitor.[reference:5] Built-in protection includes internal current limit with foldback and thermal limit with hysteresis.[reference:6] The device can be easily paralleled to further reduce noise, increase output current and spread heat on a PCB.[reference:7] The LT3094 is available in a thermally enhanced 12-Lead MSOP package.[reference:8]

Ultralow Noise 0.8µVRMS integrated output noise (10Hz to 100kHz) and 2.2nV/√Hz spot noise at 10kHz.[reference:9]

Ultrahigh PSRR 74dB at 1MHz provides excellent rejection of power-supply ripple.[reference:10]

Wide Input & Output Range Input voltage range: –1.8V to –20V. Output voltage range: 0V to –19.5V.[reference:11][reference:12]

DEVICE HIGHLIGHTS

Key Features and Benefits of LT3094IMSE#TRPBF

Ultralow Output Noise

0.8µVRMS integrated output noise (10Hz to 100kHz) and 2.2nV/√Hz spot noise at 10kHz provide clean power rails for noise-sensitive applications.[reference:13]

Ultrahigh PSRR

74dB PSRR at 1MHz delivers excellent rejection of power-supply ripple and switching converter noise.[reference:14]

Wide Input & Output Voltage Range

Input voltage range: –1.8V to –20V. Output voltage range: 0V to –19.5V, programmable with a single resistor.[reference:15][reference:16]

Programmable Features

Programmable current limit, fast start-up capability, and programmable power good to indicate output voltage regulation.[reference:17]

Tracking Function (VIOC)

VIOC pin controls an upstream regulator to minimize power dissipation and optimize PSRR by maintaining a constant voltage across the LT3094.[reference:18]

Thermally Enhanced Package

Available in 12-Lead MSOP and 3mm × 3mm DFN packages. Can be paralleled to reduce noise, increase output current, and spread heat.[reference:19][reference:20]

REFERENCE DATA

Technical Specifications for LT3094IMSE#TRPBF

Part Number	LT3094IMSE#TRPBF	Manufacturer	Analog Devices
Device Type	Ultralow Noise Negative Linear Regulator	Output Current	500mA
Input Voltage Range	–1.8V to –20V[reference:21]	Output Voltage Range	0V to –19.5V[reference:22]
Dropout Voltage @ 500mA	235mV Typical, 310mV Max[reference:23]	SET Pin Current	100µA ±1% Initial Accuracy[reference:24]
Output Noise (10Hz–100kHz)	0.8µVRMS[reference:25]	Spot Noise @ 10kHz	2.2nV/√Hz[reference:26]
PSRR @ 1MHz	74dB[reference:27]	PSRR @ 120Hz	108dB[reference:28]
Operating Quiescent Current	2.35mA Typical[reference:29]	Shutdown Current	3µA[reference:30]
Minimum Output Capacitor	10µF Ceramic[reference:31]	Package	12-Lead MSOP (MSE)
Mounting Type	Surface Mount	Operating Temperature (I-Grade)	-40°C to +125°C[reference:32]
Junction Temperature (Max)	150°C[reference:33]	Storage Temperature	-65°C to +150°C[reference:34]
Thermal Resistance θJA (MSOP)	33°C/W[reference:35]	Thermal Resistance θJC (MSOP)	9°C/W[reference:36]
Packaging	Tape & Reel[reference:37]	RoHS	Yes (#PBF Suffix)

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for LT3094IMSE#TRPBF

Output Voltage Programming

The LT3094IMSE#TRPBF output voltage is programmed with a single resistor:

Output Voltage Formula: V_OUT = –I_SET × R_SET, where I_SET = 100µA (typical)[reference:38]
Example: R_SET = 33.2kΩ gives V_OUT = –3.3V[reference:39]
Output Voltage Range: 0V to –19.5V[reference:40]
SET Pin Current Accuracy: ±1% initial accuracy[reference:41]

PCB and Power-Supply Guidance

Negative regulator performance depends on layout, bypassing, and component selection:

Place a 10µF ceramic output capacitor as close to the OUT and GND pins as possible[reference:42]
Connect a capacitor from SET to GND (C_SET) to reduce noise and improve PSRR[reference:43]
The exposed pad (Pin 13) is IN and must be soldered to the PCB[reference:44]
VIOC pin can control an upstream regulator to minimize power dissipation[reference:45]
Programmable current limit can be set with an external resistor on the I_LIM pin[reference:46]
Thermal resistance θJA = 33°C/W for the MSOP package[reference:47]

12-LEAD MSOP (MSE)

Pin Configuration Reference for LT3094IMSE#TRPBF

LT3094

MSOP (MSE) TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The MSE package has 12 pins with exposed pad (Pin 13) connected to IN[reference:48].

1 IN Negative Input Supply Voltage[reference:49]

2 IN Negative Input Supply Voltage[reference:50]

3 EN/UV Bipolar Enable/Undervoltage Lockout Pin[reference:51][reference:52]

4 PG Programmable Power Good Output[reference:53][reference:54]

5 PGFB Power Good Feedback Input[reference:55][reference:56]

6 I_LIM Programmable Current Limit Pin[reference:57][reference:58]

7 VIOC Tracking Control Output - Controls Upstream Regulator[reference:59][reference:60]

8 SET Output Voltage Program and Noise Reduction Pin[reference:61][reference:62]

9 GND Ground[reference:63]

10 OUTS Output Voltage Sense Pin[reference:64]

11 OUT Regulated Output Voltage[reference:65]

12 OUT Regulated Output Voltage[reference:66]

APPLICATION AREAS

Typical Applications for LT3094IMSE#TRPBF

RF and Precision Power Supplies

Ultralow noise and ultrahigh PSRR make it ideal for powering sensitive RF and precision analog circuits.[reference:67]

Very Low Noise Instrumentation

Provides clean power for high-precision instrumentation and measurement equipment.[reference:68]

High Speed / High Precision Data Converters

Ideal for powering high-speed ADCs and DACs requiring low noise supplies.[reference:69]

Medical Applications

Diagnostics and imaging equipment requiring ultralow noise power supplies.[reference:70]

Post-Regulator for Switching Supplies

Clean up noisy switching regulator outputs with 74dB PSRR at 1MHz.[reference:71]

Low Noise Negative Supply Generation

Generate clean negative voltage rails from –1.8V to –20V input sources.

REPLACEMENT GUIDANCE

Selecting an Alternative for LT3094IMSE#TRPBF

A replacement for the LT3094IMSE#TRPBF should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Output current capability (500mA)

Input voltage range (–1.8V to –20V)

Output voltage range (0V to –19.5V)

Output noise (0.8µVRMS)

PSRR (74dB @ 1MHz)

Package (12-lead MSOP or DFN)

Temperature range (I-Grade: –40°C to +125°C)

Programmable current limit and power good

Family alternatives: LT3094EDD#TRPBF (E-Grade, –40°C to 125°C, DFN package), LT3094HDD#TRPBF (H-Grade, –40°C to 150°C, DFN package), LT3094MPDD#TRPBF (MP-Grade, –55°C to 150°C, DFN package), LT3094EMSE#TRPBF (E-Grade, MSOP package), LT3094HMSE#TRPBF (H-Grade, MSOP package)[reference:72]. The LT3094IMSE#TRPBF offers the I-Grade temperature range (–40°C to 125°C) in the MSOP package. Select based on temperature range, package, and packaging needs.

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MANUFACTURER INFORMATION

Analog Devices

The LT3094 (LT3094IMSE#TRPBF) belongs to the ultralow noise, ultrahigh PSRR negative linear regulator portfolio of Analog Devices. The family is designed for powering noise-sensitive applications such as RF circuits, precision instrumentation, high-speed data converters, and medical diagnostic equipment.[reference:73][reference:74]

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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LT3094IMSE#TRPBF Technical Information

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Specifications

Product Attribute: Attribute Value

Part Number: LT3094IMSE#TRPBF

Manufacturer: Analog Devices Inc.

Package: 12-TSSOP (0.118", 3.00mm Width) Exposed Pad

Series: -

Package/Case: 12-TSSOP (0.118", 3.00mm Width) Exposed Pad

Packaging: Tape & Reel (TR)

Product Status: Active

Output Configuration: Negative

Output Type: Adjustable

Number of Regulators: 1

Voltage - Input (Max): -2.3V

Voltage - Output (Min/Fixed): -19.5V

Voltage - Output (Max): 0V

Voltage Dropout (Max): 0.41V @ 500mA

Current - Output: 500mA

Current - Quiescent (Iq): 2.35 mA

Current - Supply (Max): 23 mA

PSRR: 108dB ~ 28dB (120Hz ~ 10MHz)

Control Features: Enable, Power Good, Soft Start

Protection Features: Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)

Operating Temperature: -40°C ~ 125°C

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 12-MSOP-EP

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Part Number: LT3094IMSE#TRPBF

Manufacturer: Analog Devices Inc.

Package: 12-TSSOP (0.118", 3.00mm Width) Exposed Pad

Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

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