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Analog Devices Inc. LT3095MPUDD#TRPBF
- Part No.:
- LT3095MPUDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LT3095MPUDD#TRPBF.pdf
- Description:
- IC REG DL BOOST/LINEAR 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
LT3095MPUDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, low-noise bias generator IC integrating two independent boost + LDO stages. Each channel delivers up to 50mA with <4µVRMS noise (10Hz–100kHz), 72dB PSRR at 1MHz, and output voltage programmable from 1V to 20V via a single resistor. It operates from 3V–20V input and is used in precision instrumentation amplifier biasing, RF front-end supplies, and USB-powered noise-sensitive systems.
For engineers reviewing the LT3095MPUDD#TRPBF datasheet, LT3095MPUDD#TRPBF pinout, LT3095MPUDD#TRPBF application, or LT3095MPUDD#TRPBF equivalent, key selection criteria include dual-channel tracking boost-LDO architecture, –55°C to 125°C extended temperature rating, 24-lead 3mm × 5mm QFN package with exposed thermal pad, and external frequency programming via RT pin.
Technical Context
The LT3095MPUDD#TRPBF implements a tightly coupled two-stage architecture per channel: a peak-current-mode boost regulator dynamically tracks its downstream linear regulator by maintaining a fixed ~2V differential (VLDOIN – VOUT), optimizing PSRR, transient response, and power dissipation. Each LDO uses a precision 50µA SET-pin reference current for resistor-programmed output voltage without feedback resistors.
Its internal oscillator supports 450kHz–2MHz switching frequency via RT pin resistor or external synchronization via SYNC pin. Integrated Schottky diodes, internal compensation, and symmetric pinout reduce external component count and simplify layout-especially critical for low-noise analog supply design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 20V - supports wide-range industrial and USB-powered inputs without pre-regulation. |
| Output Current per Channel | 50mA - sufficient for biasing op-amps, ADC references, RF mixers, and sensor interfaces. |
| LDO Output Noise | 4µVRMS (10Hz–100kHz) - enables ultra-low-noise biasing of precision instrumentation amplifiers. |
| PSRR at 1MHz | 72dB - suppresses high-frequency switching ripple from boost stage before it reaches sensitive analog loads. |
| Operating Temperature | –55°C to 125°C - fully tested MP-grade rating for aerospace, downhole, and military applications. |
| Switching Frequency Range | 450kHz to 2MHz - allows EMI optimization and inductor size reduction via RT resistor or SYNC pin. |
| SET Pin Reference Current | 50µA ±1% - enables accurate, temperature-stable output voltage setting using Ohm's Law (VOUT = 50µA × RSET). |
Pinout & Package
LT3095MPUDD#TRPBF is housed in a thermally enhanced 24-lead 3mm × 5mm plastic QFN package (UDD) with an exposed GND pad (Pin 25) that must be soldered to PCB for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 5, 7, 14, 16, 20, 25) | Ground reference and thermal path | Multiple GND pins and exposed pad minimize impedance and junction temperature rise under load. |
| BSTOUT1 / BSTOUT2 (Pins 2, 19) | Boost regulator output | Supplies LDOIN1/LDOIN2; internally regulated to ~2V above corresponding OUTx for optimal PSRR and efficiency. |
| LDOIN1 / LDOIN2 (Pins 6, 15) | LDO input supply | Direct connection from BSTOUTx ensures tight tracking and eliminates need for external boost feedback. |
| OUT1 / OUT2 (Pins 8, 13) | LDO regulated output | Delivers low-noise, precision DC bias; requires ≥2.2µF ceramic capacitor with ESR < 0.1Ω for stability. |
| SET1 / SET2 (Pins 9, 12) | Voltage setpoint reference | 50µA current source enables resistor-programmed output (1V–20V); bypass capacitor reduces noise and soft-starts output. |
| EN1 / EN2 (Pins 10, 11) | Independent channel enable | 1.23V threshold with 125mV hysteresis; pulling both low enters micropower shutdown (≤2µA total quiescent current). |
| RT (Pin 17) | Oscillator frequency control | Single resistor to GND sets switching frequency from 450kHz to 2MHz - critical for EMI compliance and inductor selection. |
| SYNC (Pin 18) | External clock input | Allows synchronization to system clock to avoid beat frequencies; accepts logic-level pulses with 20–80% duty cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent boost+LDO channels | Enables simultaneous generation of two isolated, low-noise bias rails (e.g., ±15V, +5V/+12V) on one die with no cross-coupling. |
| 2V tracking boost regulation | Automatically maintains optimal (VLDOIN – VOUT) differential, eliminating manual boost voltage tuning and ensuring consistent LDO efficiency across output voltages. |
| 50µA precision SET-pin current | Provides ±1% output voltage accuracy over temperature and line without trimming; supports dynamic reprogramming via external reference. |
| Integrated Schottky diodes & compensation | Reduces BOM count by 4 components per channel and removes need for external compensation network - accelerates design-in. |
| Symmetric pinout (UDD package) | Minimizes PCB routing complexity and parasitic imbalance between channels - essential for matched noise and PSRR performance. |
Applications
| Instrumentation Amplifier Bias Supply | RF Front-End Local Oscillator Bias |
|---|---|
|
Use Scenario: Powering dual-supply instrumentation amplifiers (e.g., LT1128, ADA4077) in portable precision measurement equipment. IC Role / Device Role / Timing Role: Provides ultra-low-noise, matched ±15V bias rails with <4µVRMS noise and 72dB PSRR at 1MHz to preserve signal integrity. Use Value: Eliminates discrete LDO + boost combinations, reducing board area by >40% while improving PSRR by >20dB versus standard solutions. |
Use Scenario: Generating clean 5V/12V bias for RF mixer LO buffers and VCO tuning circuits in SDR transceivers. IC Role / Device Role / Timing Role: Delivers two independent, ripple-free supplies with synchronized switching (via SYNC pin) to prevent LO injection spurs. Use Value: Achieves <100µVP-P output ripple and eliminates need for post-LDO ferrite beads - simplifying RF layout and passing spectral mask requirements. |
| USB-Powered Audio DAC Reference | Industrial Sensor Signal Conditioning |
|
Use Scenario: Providing low-noise analog supply for high-resolution audio DACs (e.g., AK4499EQ) in USB-C powered portable DAC/amp units. IC Role / Device Role / Timing Role: Generates 3.3V and 5V bias rails from noisy 5V USB input using high-PSRR LDOs and frequency-synchronized boost stages. Use Value: Reduces DAC THD+N by >15dB compared to standard buck-LDO solutions due to sub-4µVRMS noise floor and 2MHz programmable switching. |
Use Scenario: Powering bridge-based strain gauge or RTD signal chains in harsh industrial environments (e.g., process control, oil & gas). IC Role / Device Role / Timing Role: Supplies precision 10V excitation and low-drift op-amp bias with –55°C to 125°C guaranteed operation and thermal shutdown protection. Use Value: Enables direct replacement of discrete DC/DC + LDO designs while meeting IEC 61000-4-2/4-4 immunity requirements via robust internal protection. |
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 |
|---|---|---|---|
| LT3045EDD#PBF | Single-channel, 500mA LDO only; no integrated boost; requires external 3.3V/5V supply. | Not suitable for generating >VIN voltages; limited to step-down biasing where input rail is already regulated. | Select when only one high-PSRR rail is needed and input voltage exceeds required output (e.g., 5V → 3.3V sensor bias). |
| TPS65136RGER | Single-output, 200mA boost+LDO; fixed 5V/–5V outputs; no SET-pin programmability; 40µVRMS noise. | Lacks independent channel control and output voltage flexibility - unsuitable for asymmetric or dynamically adjustable rails. | Select for cost-sensitive, fixed-rail applications like LCD bias where dual ±5V is sufficient and programmability is unnecessary. |
Compared with LT3095MPUDD#TRPBF, LT3045EDD#PBF offers higher current but no voltage boosting capability, while TPS65136RGER provides lower noise floor than typical boost-LDO hybrids but sacrifices programmability and dual-channel independence - making LT3095MPUDD#TRPBF uniquely suited for precision, multi-rail, wide-input industrial and test equipment.
Availability
LT3095MPUDD#TRPBF is available at Aetrix Electronics and suitable for instrumentation amplifier biasing, RF front-end power, and industrial sensor conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3095MPUDD#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 LT3095MPUDD#TRPBF belongs to Linear Technology's ultra-low-noise power management portfolio, designed specifically for biasing noise-critical analog circuitry in test & measurement, medical imaging, and communications infrastructure.
FAQ
What is the operating temperature range of the LT3095MPUDD#TRPBF?
The LT3095MPUDD#TRPBF is an MP-grade device with full 100% testing across –55°C to 125°C junction temperature. This extended range exceeds commercial (–40°C to 125°C) and industrial grades, making it suitable for aerospace, downhole, and military applications where reliability under thermal stress is critical. The datasheet specifies all electrical parameters over this full range.
How is output voltage programmed on the LT3095MPUDD#TRPBF?
Each channel's output voltage is set using Ohm's Law: VOUT = 50µA × RSET. A precision-trimmed 50µA current flows out of the SET1 or SET2 pin into a resistor tied to GND. For example, a 200kΩ resistor yields 10V output. The SET pin also accepts external references for dynamic voltage control, provided current is limited to <1mA.
Does the LT3095MPUDD#TRPBF require external compensation components?
No - the LT3095MPUDD#TRPBF integrates full frequency compensation for both boost regulators. Its monolithic architecture eliminates the need for external compensation networks, RC snubbers, or loop-stability resistors. Only passive components (inductors, capacitors, SET resistors) are required, significantly reducing design risk and bill-of-materials count.
Can the two channels of the LT3095MPUDD#TRPBF be synchronized to the same clock?
Yes - the LT3095MPUDD#TRPBF features a dedicated SYNC pin (Pin 18) that accepts an external logic-level clock signal (20–80% duty cycle). When enabled, both boost regulators synchronize to this clock, preventing beat frequencies and easing EMI filtering in multi-rail systems such as RF transceivers or high-speed data acquisition boards.
What is the minimum output capacitance required for stability on the LT3095MPUDD#TRPBF?
The LT3095MPUDD#TRPBF requires a minimum 2.2µF ceramic output capacitor per channel with ESR < 0.1Ω for guaranteed stability. Multilayer ceramic capacitors (X5R/X7R) are recommended. Placement is critical: the capacitor must connect directly between OUTx and the adjacent GND pin (e.g., OUT1 to Pin 7 GND) to minimize parasitic inductance and prevent ringing during load transients.
LT3095MPUDD#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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (3x5)
LT3095MPUDD#TRPBF FAQ
1.How can I place an order for LT3095MPUDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3095MPUDD#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 LT3095MPUDD#TRPBF reliable?
The price and inventory of LT3095MPUDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3095MPUDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3095MPUDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3095MPUDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3095MPUDD#TRPBF?
LT3095MPUDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3095MPUDD#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 LT3095MPUDD#TRPBF?
For technical support, including LT3095MPUDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3095MPUDD#TRPBF requirements.
6.How does Aetrix verify that LT3095MPUDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3095MPUDD#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 LT3095MPUDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3095MPUDD#TRPBF?
All LT3095MPUDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3095MPUDD#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 LT3095MPUDD#TRPBF part is unused and in its original packaging.
Return procedure for LT3095MPUDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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