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Analog Devices Inc. LT3048IDC-12#TRMPBF
- Part No.:
- LT3048IDC-12#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3048IDC-12#TRMPBF.pdf
- Description:
- IC REG DL BOOST/LNR 2.2MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,722
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Product details
Overview
LT3048IDC-12#TRMPBF from Analog Devices is a dual-stage low-noise bias generator integrating a 2.2MHz fixed-frequency boost regulator and a low-dropout linear regulator in an 8-lead 2mm × 2mm DFN package. It delivers a precise 12V output at up to 31mA from a 2.7V–4.8V single-cell Li-ion input, achieving <60µVRMS noise (10Hz–100kHz) with 1nF BYP capacitor and >53dB ripple rejection at 2.2MHz - ideal for powering high-precision op amps and analog sensors.
For engineers reviewing the LT3048IDC-12#TRMPBF datasheet, LT3048IDC-12#TRMPBF pinout, LT3048IDC-12#TRMPBF application, or LT3048IDC-12#TRMPBF equivalent, key selection criteria include its fixed 12V output, integrated Schottky diode, load disconnect in shutdown, thermal/short-circuit protection, and compatibility with small 10µH inductors and ceramic output capacitors.
Technical Context
The LT3048IDC-12#TRMPBF employs peak current-mode control in its boost stage, regulating BSTOUT to 1.1V above LDOOUT (13.1V nominal), optimizing LDO transient response and PSRR. Its 2.2MHz switching frequency enables use of compact 10µH inductors while maintaining stable operation across –40°C to 125°C junction temperature.
The integrated LDO operates with 1.235V internal reference and achieves 0.1% load regulation (±20mV over 100µA–31mA), supported by dedicated LDOIN and BSTOUT pins. The BYP pin accepts a 1nF capacitor to reduce output noise and improve soft-start behavior without compromising stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.00V (±1.5% over load/temperature; 11.70V–12.30V min/max) |
| Max Output Current | 31mA continuous - sufficient for biasing multiple precision op amps or MEMS sensors |
| Output Noise | 60µVRMS (10Hz–100kHz, with 1nF BYP capacitor) - enables sub-16-bit ADC reference supply |
| Switching Frequency | 2.2MHz (typical) - allows use of 10µH inductor and minimizes EMI in space-constrained layouts |
| Ripple Rejection | 53dB at 2.2MHz - suppresses boost switching artifacts before LDO output stage |
| Input Voltage Range | 2.7V to 4.8V - compatible with single-cell Li-ion (2.8V–4.2V) and regulated 3.3V system rails |
| Quiescent Current | 20µA (LDO stage); 1µA shutdown - preserves battery life in always-on sensor nodes |
Pinout & Package
LT3048IDC-12#TRMPBF is housed in an 8-lead, 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 9 = GND). The package features 0.45mm pitch, 0.23mm lead width, and requires soldering of the exposed pad to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Boost switch node | Anode of internal Schottky diode and collector of power transistor; connects to inductor and BSTOUT bypass capacitor |
| VIN (2) | Boost input supply | Accepts 2.7V–4.8V input; must be bypassed to GND with low-ESR ceramic capacitor |
| GND (3) | Power ground | Primary ground return for boost and LDO stages; tied to exposed pad (Pin 9) |
| BYP (4) | Noise reduction terminal | Optional 1nF capacitor to LDOOUT reduces output noise and controls soft-start time |
| LDOOUT (5) | Regulated 12V output | Fixed 12V supply rail; requires ≥1µF ceramic output capacitor with ≤1Ω ESR |
| LDOIN (6) | LDO input supply | Connected internally to BSTOUT; supplies LDO stage at ~13.1V (12V + 1.1V) |
| EN (7) | Enable logic input | Active-high enable; <0.4V disables both regulators and disconnects load (IQ < 1µA) |
| BSTOUT (8) | Boost output rail | Regulated 13.1V output (12V + 1.1V); bypassed to GND with 4.7µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky diode | Eliminates external diode, reducing BOM count and PCB area in boost stage |
| Load disconnect in shutdown | Internal switch isolates LDOOUT from input during EN = low, preventing backfeed |
| Thermal & short-circuit protection | Auto-recovery shutdown prevents damage under overload or ambient >125°C |
| Low-noise BYP interface | 1nF capacitor between LDOOUT and BYP reduces RMS noise by >50% vs. no BYP |
| Stable with ceramic output caps | Guaranteed stability with ≥1µF X5R/X7R ceramics (ESR ≤1Ω), simplifying layout |
Applications
| High-Precision Op Amp Bias | MEMS Sensor Excitation |
|---|---|
|
Use Scenario: Powering rail-to-rail input/output op amps in portable instrumentation requiring ultra-low noise and tight DC accuracy. IC Role / Device Role / Timing Role: Provides clean, regulated 12V bias for op amp V+ rail while rejecting switching noise from boost stage. Use Value: 60µVRMS noise and 0.1% load regulation ensure <0.01% gain error and minimal offset drift in transimpedance amplifiers. |
Use Scenario: Supplying excitation voltage to piezoresistive or capacitive MEMS pressure sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Delivers stable 12V bias with fast transient response to maintain sensor linearity during dynamic pressure events. Use Value: 2.2MHz switching and 1.1V LDOIN–LDOOUT headroom enable <10µs recovery from 20mA load steps, preserving measurement fidelity. |
| Portable Medical Front-End | Li-ion Powered Signal Chain |
|
Use Scenario: Generating clean analog supply rails for EEG/ECG front-end ICs in handheld diagnostic devices. IC Role / Device Role / Timing Role: Serves as primary analog bias source, replacing discrete boost+LDO solutions to reduce size and EMI. Use Value: Integrated thermal protection and 1µA shutdown current extend battery runtime while ensuring safe operation during clinical use. |
Use Scenario: Converting single-cell Li-ion (2.8V–4.2V) to stable 12V for analog signal conditioning in portable test equipment. IC Role / Device Role / Timing Role: Acts as compact, self-contained bias generator eliminating need for external feedback resistors or compensation networks. Use Value: Fixed 12V output and DFN-8 footprint (2mm × 2mm) reduce board area by >40% versus discrete alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise bias generation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3048EDC-12#TRMPBF | E-grade (0°C to 125°C) vs. I-grade (–40°C to 125°C); identical electrical specs and pinout | Suitable for commercial-temperature industrial applications but not extended cold environments | Select when operating ambient stays above 0°C and cost sensitivity outweighs extended temp range |
| LT3095EDD#PBF | Dual-channel, adjustable 1V–20V outputs; 450kHz–2MHz programmable frequency; 4µVRMS noise | Supports independent dual-rail biasing (e.g., ±12V) but requires external resistors and larger 3mm × 5mm QFN | Choose for multi-rail systems needing lower noise or wider output flexibility, accepting larger footprint and design complexity |
Compared with LT3048EDC-12#TRMPBF, the LT3048IDC-12#TRMPBF ensures reliable operation down to –40°C for outdoor or automotive-adjacent sensor nodes; compared with LT3095EDD#PBF, it offers simpler single-rail 12V generation in half the PCB area but with higher output noise and fixed voltage.
Availability
LT3048IDC-12#TRMPBF is available at Aetrix Electronics and suitable for high-precision op amp biasing, MEMS sensor excitation, and portable medical front-end designs requiring stable component supply, guaranteed long-term availability, and full traceability.
Supply support for LT3048IDC-12#TRMPBF 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets since 1965.
The LT3048 series was designed specifically for ultra-low-noise bias generation in space-constrained, battery-powered analog signal chains - combining boost conversion efficiency with LDO precision in a miniature DFN package.
FAQ
What is the guaranteed output voltage tolerance for LT3048IDC-12#TRMPBF across temperature and load?
The LT3048IDC-12#TRMPBF guarantees a 12.00V output with ±1.5% total error over –40°C to 125°C junction temperature and 100µA–31mA load current. Electrical characteristics specify 11.70V minimum and 12.30V maximum under full conditions, reflecting combined initial accuracy, load regulation (±20mV), and thermal drift.
Can LT3048IDC-12#TRMPBF operate from a 2.5V input?
No. The LT3048IDC-12#TRMPBF requires a minimum input voltage of 2.7V per absolute maximum ratings and electrical specifications. At 2.5V, the boost regulator cannot sustain the required 13.1V BSTOUT rail (12V + 1.1V), resulting in LDOOUT dropout and unregulated output. Operation below 2.7V is not characterized or guaranteed.
What is the purpose of the BYP pin on LT3048IDC-12#TRMPBF, and what capacitor value is recommended?
The BYP pin on LT3048IDC-12#TRMPBF provides a dedicated connection point for a noise-reduction capacitor between LDOOUT and BYP. A 1nF ceramic capacitor is recommended to reduce output voltage noise by >50% and control soft-start behavior. Leaving BYP unconnected results in higher RMS noise (225µVRMS vs. 60µVRMS) and faster startup.
Does LT3048IDC-12#TRMPBF require an external feedback resistor network?
No. The LT3048IDC-12#TRMPBF is a fixed-output variant - it does not use the FB pin and has no external feedback resistors. Unlike the adjustable LT3048, it integrates internal resistor division to regulate LDOOUT precisely to 12.00V, simplifying design and eliminating resistor tolerance errors.
How does LT3048IDC-12#TRMPBF handle overcurrent or thermal faults?
Under overcurrent or thermal fault conditions, the LT3048IDC-12#TRMPBF enters auto-recovery shutdown: the LDO limits output current, causing LDOOUT voltage to drop, which reduces BSTOUT voltage and minimizes power dissipation in the internal pass transistor. Thermal shutdown activates above 125°C junction temperature and releases once temperature falls below the hysteresis threshold.
LT3048IDC-12#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Up (Boost) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 2.2MHz
- Voltage/Current - Output 1:
- 13.1V, 300mA
- Voltage/Current - Output 2:
- 12V, 45mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.7V ~ 4.8V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT3048IDC-12#TRMPBF FAQ
1.How can I place an order for LT3048IDC-12#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3048IDC-12#TRMPBF 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 LT3048IDC-12#TRMPBF reliable?
The price and inventory of LT3048IDC-12#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3048IDC-12#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3048IDC-12#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3048IDC-12#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3048IDC-12#TRMPBF?
LT3048IDC-12#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3048IDC-12#TRMPBF 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 LT3048IDC-12#TRMPBF?
For technical support, including LT3048IDC-12#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3048IDC-12#TRMPBF requirements.
6.How does Aetrix verify that LT3048IDC-12#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3048IDC-12#TRMPBF 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 LT3048IDC-12#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3048IDC-12#TRMPBF?
All LT3048IDC-12#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3048IDC-12#TRMPBF, 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 LT3048IDC-12#TRMPBF part is unused and in its original packaging.
Return procedure for LT3048IDC-12#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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