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Analog Devices Inc. LT3095EUDD#TRPBF
- Part No.:
- LT3095EUDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LT3095EUDD#TRPBF.pdf
- Description:
- IC REG DL BOOST/LINEAR 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,433
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Product details
Overview
LT3095EUDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, low-noise bias generator IC integrating two independent boost + LDO chains. Each channel delivers up to 50mA with <4µVRMS noise (10Hz–100kHz), 72dB PSRR at 1MHz, and output programmability from 1V to 20V via a single resistor. It targets precision analog front-ends in instrumentation amplifiers and RF biasing.
For engineers reviewing the LT3095EUDD#TRPBF datasheet, LT3095EUDD#TRPBF pinout, LT3095EUDD#TRPBF application, or LT3095EUDD#TRPBF equivalent, key selection criteria include dual independent 50mA low-noise outputs, externally programmable 450kHz–2MHz switching frequency, SYNC capability, thermal performance in the 3mm × 5mm QFN package, and guaranteed operation from –40°C to 125°C junction temperature.
Technical Context
The LT3095EUDD#TRPBF implements a two-stage architecture per channel: a peak-current-mode boost regulator followed by a unity-gain, single-resistor-programmable linear regulator. The boost stage dynamically tracks the LDO output, maintaining a fixed ~2V differential (VLDOIN – VOUT) to optimize PSRR, transient response, and power dissipation.
Each channel features independent enable pins with 1.23V threshold and 125mV hysteresis, internal current limit (~70mA), thermal shutdown, and integrated Schottky diodes. The RT pin sets oscillator frequency; SYNC allows external clock synchronization up to 2MHz with 20–80% duty cycle support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current per Channel | 50mA max - supports dual bias rails for precision analog sensors or RF ICs without external pass devices. |
| Output Noise | 4µVRMS (10Hz–100kHz) - enables clean biasing of instrumentation amplifiers and ADC reference circuits. |
| PSRR at 1MHz | 72dB - suppresses high-frequency switching ripple from the boost stage before it reaches sensitive analog loads. |
| Switching Frequency Range | 450kHz–2MHz (RT-programmable) - allows EMI optimization and inductor size reduction while maintaining stability. |
| Input Voltage Range | 3V to 20V - accommodates USB-powered, industrial, and wide-range DC input systems. |
| Operating Temperature | –40°C to 125°C (junction) - qualified for automotive under-hood and industrial control environments. |
| SET Pin Reference Current | 50µA ±1% - enables precise, temperature-stable output voltage programming using Ohm's Law (VOUT = 50µA × RSET). |
Pinout & Package
LT3095EUDD#TRPBF is housed in a thermally enhanced 24-lead 3mm × 5mm plastic QFN (UDD) package with exposed pad (Pin 25) soldered to PCB ground for optimal thermal performance (θJA = 38°C/W). Symmetric pinout simplifies layout and reduces routing asymmetry between channels.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,5,7,14,16,20,25) | System Ground Reference | Multiple GND pins and exposed pad ensure low-impedance return paths for both boost and LDO stages; critical for noise and thermal integrity. |
| BSTOUT1 / BSTOUT2 (Pins 2,19) | Boost Regulator Output | Supplies regulated ~2V above corresponding OUT pin; directly connects to LDOIN1/LDOIN2 - no external feedback required. |
| LDOIN1 / LDOIN2 (Pins 6,15) | LDO Input Supply | Receives boosted voltage; must be bypassed with ≥10µF ceramic capacitor to stabilize boost loop and feed LDO input. |
| OUT1 / OUT2 (Pins 8,13) | Regulated Output | Delivers final low-noise bias; requires ≥2.2µF ceramic capacitor (ESR < 0.1Ω) placed adjacent to GND pin for stability. |
| SET1 / SET2 (Pins 9,12) | Voltage Programming Node | Sinks precision 50µA reference current; output voltage set by RSET = VOUT / 50µA; minimum 10nF capacitor improves noise and soft-start. |
| EN1 / EN2 (Pins 10,11) | Independent Enable Control | Logic-level enable with 1.23V threshold and 125mV hysteresis; pulling both low enters micropower shutdown (<2µA total quiescent). |
| RT (Pin 17) | Oscillator Frequency Set | Resistor-to-GND programs switching frequency from 450kHz to 2MHz; enables EMI tailoring and inductor selection flexibility. |
| SYNC (Pin 18) | External Clock Input | Accepts logic-level clock (0.8–1.3V threshold); synchronizes both boost regulators to avoid beat frequencies in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent boost+LDO channels | Enables simultaneous generation of two ultra-low-noise bias rails (e.g., 5V/15V) with no shared regulation path or crosstalk. |
| 2V tracking boost architecture | Maintains fixed (VLDOIN – VOUT) ≈ 2V automatically - eliminates need for external boost feedback and ensures optimal LDO headroom across all output voltages. |
| Integrated Schottky diodes & compensation | Reduces BOM count by 4 diodes and removes external compensation components; simplifies design and improves reliability. |
| Single-resistor output programming | Uses precision 50µA SET pin current for direct Ohm's Law-based voltage setting - eliminates trimming, DACs, or digital interfaces. |
| Thermally enhanced 3mm × 5mm QFN | Exposes die pad to PCB ground (θJC = 5.0°C/W); supports 50mA/channel continuous operation without heatsink in typical layouts. |
Applications
| Instrumentation Amplifier Bias | RF Front-End Bias |
|---|---|
|
Use Scenario: Powering dual-supply instrumentation amplifiers (e.g., LT1167, AD8421) in portable test equipment requiring ultra-low noise and high CMRR. IC Role / Device Role / Timing Role: LT3095EUDD#TRPBF provides matched ±15V (or asymmetric 5V/15V) low-noise bias rails with <4µVRMS noise and 72dB PSRR at RF frequencies. Use Value: Prevents supply-induced gain error and offset drift; enables sub-1µV input-referred noise performance in µV-level measurements. |
Use Scenario: Generating clean bias voltages for GaAs FETs, LNAs, and mixer bias networks in 5G infrastructure and spectrum analyzers. IC Role / Device Role / Timing Role: LT3095EUDD#TRPBF delivers isolated, low-ripple 5V and 12V rails with synchronized switching to avoid heterodyne interference in RF signal chains. Use Value: Reduces phase noise degradation and spurious emissions caused by supply ripple coupling into active RF components. |
| Data Acquisition System Reference | USB-Powered Precision Sensor |
|
Use Scenario: Supplying reference buffers and ADC driver stages in 24-bit delta-sigma data acquisition modules with isolated analog domains. IC Role / Device Role / Timing Role: LT3095EUDD#TRPBF generates independent 5V (for reference) and 3.3V (for drivers) rails with <100µVP-P total output ripple and noise. Use Value: Preserves effective number of bits (ENOB) by minimizing supply-induced quantization noise and reference modulation. |
Use Scenario: Providing regulated, low-noise bias for MEMS accelerometers, piezoresistive pressure sensors, and bridge-based strain gauges in USB-powered IoT nodes. IC Role / Device Role / Timing Role: LT3095EUDD#TRPBF operates from 3.3V–5V USB input to generate stable 3.3V and 1.8V rails with micropower shutdown (<2µA) when idle. Use Value: Extends battery life in portable sensor hubs while maintaining µV-level sensor signal integrity during active measurement cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel low-noise bias generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3265EUF#PBF | Charge-pump based (not boost+LDO); max 100mA total; fixed ±5V/±10V outputs; no RT/SYNC; higher output noise (20µVRMS). | Suitable only for fixed dual-rail applications where programmability and ultra-low noise are not required. | Choose LTC3265EUF#PBF only if board space is extremely constrained and output voltage flexibility is unnecessary. |
| LT3045EDD#PBF (dual discrete) | Single-channel ultra-low-noise LDO (0.8µVRMS); requires external boost stage; no integrated switching or SYNC; larger solution size. | Used where absolute lowest noise is mandatory and system already includes boost converters or designers prefer modular design. | Choose LT3045EDD#PBF only when <1µVRMS noise is required and external boost regulation is acceptable. |
Compared with LTC3265EUF#PBF, LT3095EUDD#TRPBF offers programmable outputs, lower noise, and better PSRR but requires inductors. Compared with LT3045EDD#PBF, it integrates switching and reduces component count, trading slight noise penalty for full integration and smaller footprint.
Availability
LT3095EUDD#TRPBF is available at Aetrix Electronics and suitable for instrumentation amplifier bias, RF front-end power, and USB-powered precision sensor applications requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for LT3095EUDD#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision, power, and connectivity applications.
The LT3095EUDD#TRPBF belongs to Linear Technology's precision power management product line, designed specifically for noise-sensitive analog systems requiring dual, independently controllable, low-ripple bias supplies in compact form factors.
FAQ
What is the maximum output voltage range supported by the LT3095EUDD#TRPBF?
The LT3095EUDD#TRPBF supports an output voltage range of 1V to 20V per channel, set by connecting a resistor from the SET1 or SET2 pin to ground (VOUT = 50µA × RSET). This range is fully specified over the –40°C to 125°C junction temperature range and applies independently to each channel.
How does the LT3095EUDD#TRPBF achieve low output noise despite using a switching boost stage?
The LT3095EUDD#TRPBF achieves <4µVRMS noise by combining a high-PSRR linear regulator stage (72dB at 1MHz) with post-regulation of the boost output. The boost stage is tightly tracked to maintain ~2V headroom, and internal design minimizes coupling paths - resulting in <100µVP-P total output ripple and noise even with switching operation.
Can the LT3095EUDD#TRPBF operate from a 3.3V USB input to generate 5V and 15V outputs?
Yes - the LT3095EUDD#TRPBF accepts input voltages from 3V to 20V. From a 3.3V USB source, it can generate 5V (requiring ~1.7V boost headroom) and 15V (requiring ~11.7V boost headroom) simultaneously. Efficiency depends on load; typical efficiency exceeds 75% at 50mA per channel with optimized inductor selection.
What is the purpose of the exposed thermal pad (Pin 25) on the LT3095EUDD#TRPBF QFN package?
The exposed pad (Pin 25) on the LT3095EUDD#TRPBF is electrically and thermally connected to GND. It must be soldered to a PCB copper pour tied to system ground to achieve θJA = 38°C/W and θJC = 5.0°C/W. This thermal path is essential for sustaining 50mA per channel continuously at elevated ambient temperatures.
Does the LT3095EUDD#TRPBF require external compensation components for stability?
No - the LT3095EUDD#TRPBF features fully internal frequency compensation for both boost regulators. Stability is ensured with only the recommended external components: boost output capacitors (≥10µF), LDO output capacitors (≥2.2µF, ESR < 0.1Ω), and SET pin bypass capacitors (≥10nF). No external RC networks or compensation pins are needed.
LT3095EUDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Up (Boost) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 450kHz ~ 2MHz
- Voltage/Current - Output 1:
- Adj, 950mA
- Voltage/Current - Output 2:
- 1V ~ 20V, 50mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 3V ~ 20V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (3x5)
LT3095EUDD#TRPBF FAQ
1.How can I place an order for LT3095EUDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3095EUDD#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT3095EUDD#TRPBF reliable?
The price and inventory of LT3095EUDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3095EUDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3095EUDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3095EUDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3095EUDD#TRPBF?
LT3095EUDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3095EUDD#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT3095EUDD#TRPBF?
For technical support, including LT3095EUDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3095EUDD#TRPBF requirements.
6.How does Aetrix verify that LT3095EUDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3095EUDD#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT3095EUDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3095EUDD#TRPBF?
All LT3095EUDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3095EUDD#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT3095EUDD#TRPBF part is unused and in its original packaging.
Return procedure for LT3095EUDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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