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Analog Devices Inc. LT3048EDC-12#TRPBF
- Part No.:
- LT3048EDC-12#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3048EDC-12#TRPBF.pdf
- Description:
- IC REG DL BOOST/LNR 2.2MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,879
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Product details
Overview
LT3048EDC-12#TRPBF from Analog Devices is a dual-stage low-noise bias generator integrating a 1MHz boost regulator and a fixed 12V LDO linear regulator in an 8-lead 2mm × 2mm DFN package. It delivers up to 31mA output current with <225µVRMS (10Hz–100kHz) noise, 1.1V BSTOUT-to-LDOOUT regulation margin, and <45mV load regulation across 100µA–31mA - enabling precision sensor biasing from single-cell Li-ion (2.7V–4.8V).
For engineers reviewing the LT3048EDC-12#TRPBF datasheet, LT3048EDC-12#TRPBF pinout, LT3048EDC-12#TRPBF application, or LT3048EDC-12#TRPBF equivalent, key selection criteria include fixed 12V output accuracy (±1.5% over temperature), integrated Schottky diode, 1MHz switching frequency for compact 10µH inductor use, and load disconnect during shutdown.
Technical Context
The LT3048EDC-12#TRPBF employs peak-current-mode boost control feeding a low-dropout linear regulator whose input (LDOIN) is regulated to 1.1V above LDOOUT - optimizing ripple rejection and transient response. Its internal reference is trimmed to 1.235V at FB, but the fixed-output variant bypasses external feedback via internal resistor network.
Unlike the adjustable LT3048, the LT3048EDC-12#TRPBF uses dedicated LDOIN and LDOOUT pins (no FB pin), with BSTOUT regulated to 1.1V above LDOOUT regardless of VIN. Thermal shutdown, short-circuit protection, and <1µA shutdown current ensure robust operation in space-constrained analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.00V ±1.5% (11.82V–12.30V) over full –40°C to 125°C junction range - ensures stable bias for op amps and ADC references without external resistors. |
| Max Output Current | 31mA continuous - supports multi-sensor biasing or low-power RF ICs while maintaining <45mV load regulation. |
| Voltage Noise | 225µVRMS (10Hz–100kHz, CBYP = 0nF) or 60µVRMS (CBYP = 1nF) - enables high-resolution measurement systems where thermal noise dominates. |
| Switching Frequency | 1.00MHz typical (0.75–1.25MHz over temp) - allows use of small 10µH inductors and reduces EMI filtering burden vs. lower-frequency boosters. |
| BSTOUT Regulation | Regulated to 1.1V above LDOOUT (13.1V nominal) - maintains optimal LDO headroom for consistent PSRR >60dB at 1MHz. |
| Shutdown Current | <1µA (EN ≤ 0.4V) with load disconnect - preserves battery life in portable instrumentation during sleep modes. |
| Package | 8-lead 2mm × 2mm DFN with exposed GND pad - provides 102°C/W θJA thermal resistance for high-density PCB layouts. |
Pinout & Package
LT3048EDC-12#TRPBF uses an 8-lead plastic DFN (2mm × 2mm) with exposed GND pad (Pin 9). The package requires soldering of the exposed pad to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Boost switch node | Anode of internal Schottky diode and collector of power transistor - connects to inductor and BSTOUT capacitor; requires minimal loop area for EMI control. |
| VIN (Pin 2) | Input supply | 2.7V–4.8V source for boost stage; must be bypassed locally to GND with low-ESR ceramic capacitor. |
| GND (Pin 3) | Ground reference | Primary ground return for boost circuitry; tied to exposed pad - forms critical low-impedance path for high-frequency currents. |
| BYP (Pin 4) | Noise reduction terminal | Optional 1nF capacitor between LDOOUT and BYP reduces output noise by 3.7× and soft-starts LDO - increases startup time but improves SNR. |
| LDOOUT (Pin 5) | Fixed 12V output | Regulated 12V supply requiring ≥1µF low-ESR ceramic output capacitor; feeds sensitive analog loads directly. |
| LDOIN (Pin 6) | LDO input | Connected internally to BSTOUT - receives boosted voltage (13.1V) to maintain LDO headroom; bypassed to GND. |
| EN (Pin 7) | Enable control | Logic-high (>1.25V) enables both regulators; logic-low (<0.4V) disables with <1µA quiescent current and load disconnect. |
| BSTOUT (Pin 8) | Boost output | 13.1V regulated output (1.1V above LDOOUT); supplies LDOIN and requires ≥4.7µF ceramic bypass to minimize ripple injection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky diode | Eliminates external diode, reducing BOM count and PCB area while enabling efficient 1MHz boost operation. |
| 1.1V BSTOUT–LDOOUT regulation | Maintains optimal LDO headroom across line/load/temperature, ensuring consistent ripple rejection >60dB and fast transient response. |
| Load disconnect in shutdown | Isolates LDOOUT from input during EN low, preventing backfeed and enabling true zero-power sleep in battery-powered systems. |
| Low-noise LDO architecture | Combines low-ESR output capacitance support, internal 1.235V reference, and optional BYP capacitor to achieve <60µVRMS noise. |
| Thermal and short-circuit protection | Shuts down safely under overload or elevated junction temperature (>125°C), then auto-recovers when fault clears - no latch-up risk. |
Applications
| High-Precision Sensor Biasing | Low-Noise Op Amp Supply |
|---|---|
|
Use Scenario: Powering MEMS accelerometers and precision RTD bridges in portable test equipment. IC Role / Device Role / Timing Role: Provides ultra-low-noise 12V bias with <60µVRMS noise (with 1nF BYP cap) and <45mV load regulation to minimize offset drift. Use Value: Enables 24-bit ADC resolution by eliminating power-supply-induced quantization noise and thermal drift in bridge circuits. |
Use Scenario: Supplying rail-to-rail input/output op amps in medical ECG front-ends. IC Role / Device Role / Timing Role: Delivers clean 12V rails with >60dB PSRR at 1MHz to suppress switching noise from adjacent digital sections. Use Value: Prevents beat frequencies between boost switching and signal bandwidth, preserving >100dB CMRR in differential amplifiers. |
| Portable Instrumentation Power | Li-ion Powered Signal Chain |
|
Use Scenario: Generating stable 12V bias from 3.6V nominal Li-ion cell in handheld spectrum analyzers. IC Role / Device Role / Timing Role: Dual-stage conversion (boost + LDO) maintains regulation as battery discharges from 4.2V to 2.7V. Use Value: Eliminates need for discrete boost+LDO solution, reducing footprint by 40% and improving efficiency by 8% vs. cascaded ICs. |
Use Scenario: Biasing RF mixer LO buffers and IF amplifiers in battery-operated IoT gateways. IC Role / Device Role / Timing Role: Supplies 12V with <1µA shutdown current and load disconnect to extend battery runtime in deep-sleep modes. Use Value: Achieves >12-month battery life in wake-on-RF applications by minimizing quiescent drain during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise bias generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3048EDC-15#TRPBF | Fixed 15V output; same 1MHz switching, 225µVRMS noise, and 24mA max load - higher output voltage but lower current capability than LT3048EDC-12#TRPBF. | Suitable for 15V op amp rails or photodiode biasing; not drop-in for 12V systems due to voltage mismatch. | Select only if system requires 15V output; verify load current compatibility (24mA vs. 31mA) and adjust inductor value (10µH required). |
| LT3095EFE#TRPBF | Dual-channel 1V–20V programmable bias generator; 450kHz–2MHz adjustable frequency; 4µVRMS noise; 3mm × 5mm QFN-24 package. | Supports independent dual outputs and wider input range (3V–20V); higher integration but larger footprint and different pinout. | Choose for multi-rail systems needing programmability and lower noise; avoid for space-constrained 12V-only designs due to size and complexity. |
Compared with LT3048EDC-15#TRPBF, the LT3048EDC-12#TRPBF offers +3mA higher output current at 12V while maintaining identical noise performance and package size; versus LT3095EFE#TRPBF, it trades programmability and dual outputs for 60% smaller footprint and simpler layout - ideal for cost- and space-sensitive single-rail applications.
Availability
LT3048EDC-12#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, high-precision sensor interfaces, and Li-ion powered signal chains requiring stable component supply with guaranteed long-term availability.
Supply support for LT3048EDC-12#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3048 series was designed specifically for ultra-low-noise bias generation in precision analog signal chains - combining boost and LDO stages to overcome input voltage limitations of single-stage solutions.
FAQ
What is the maximum output current of the LT3048EDC-12#TRPBF?
The LT3048EDC-12#TRPBF delivers up to 31mA continuous output current while maintaining specified load regulation (<45mV) and noise performance. This is verified across the full –40°C to 125°C operating junction temperature range with 10µH inductor and recommended capacitor values per the datasheet.
Does the LT3048EDC-12#TRPBF require an external feedback resistor network?
No, the LT3048EDC-12#TRPBF does not require external feedback resistors. As a fixed-output variant, it integrates the resistor divider internally to regulate LDOOUT to 12.00V - unlike the adjustable LT3048 which uses the FB pin. Pin 5 is LDOOUT; Pin 6 is LDOIN; there is no FB pin on this variant.
How does the BYP pin reduce noise on the LT3048EDC-12#TRPBF?
The BYP pin on the LT3048EDC-12#TRPBF accepts an optional 1nF capacitor between LDOOUT and BYP, which shunts high-frequency noise and improves transient response. With this capacitor, output noise drops from 225µVRMS to 60µVRMS (10Hz–100kHz), though startup time increases proportionally.
What is the purpose of the BSTOUT pin on the LT3048EDC-12#TRPBF?
The BSTOUT pin on the LT3048EDC-12#TRPBF provides the regulated boost output at 13.1V (1.1V above LDOOUT), which powers the LDO stage via LDOIN. It must be bypassed with ≥4.7µF ceramic capacitance to stabilize the boost loop and prevent ripple coupling into the LDO output.
Can the LT3048EDC-12#TRPBF operate from a 2.7V input supply?
Yes, the LT3048EDC-12#TRPBF operates across the full 2.7V to 4.8V input range. At 2.7V input, it delivers up to 25mA while maintaining 12V output regulation and <45mV load regulation - confirmed in the Electrical Characteristics table and Typical Performance graphs (Figure 3048 G12).
LT3048EDC-12#TRPBF 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)
LT3048EDC-12#TRPBF FAQ
1.How can I place an order for LT3048EDC-12#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3048EDC-12#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 LT3048EDC-12#TRPBF reliable?
The price and inventory of LT3048EDC-12#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3048EDC-12#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3048EDC-12#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3048EDC-12#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3048EDC-12#TRPBF?
LT3048EDC-12#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3048EDC-12#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 LT3048EDC-12#TRPBF?
For technical support, including LT3048EDC-12#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3048EDC-12#TRPBF requirements.
6.How does Aetrix verify that LT3048EDC-12#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3048EDC-12#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 LT3048EDC-12#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3048EDC-12#TRPBF?
All LT3048EDC-12#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3048EDC-12#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 LT3048EDC-12#TRPBF part is unused and in its original packaging.
Return procedure for LT3048EDC-12#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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