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Analog Devices Inc. LT3048EDC-5#TRMPBF
- Part No.:
- LT3048EDC-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3048EDC-5#TRMPBF.pdf
- Description:
- IC REG DL BOOST/LNR 2.2MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,989
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Product details
Overview
LT3048EDC-5#TRMPBF from Analog Devices is a dual-stage low-noise bias generator integrating a 1MHz boost regulator and a low-dropout linear regulator in an 8-lead 2mm × 2mm DFN package. It generates a fixed 5V output from 2.7V–4.8V input (e.g., single-cell Li-ion), delivers up to 40mA, achieves <500µVP-P output ripple, and features integrated Schottky diode and load disconnect in shutdown.
For engineers reviewing the LT3048EDC-5#TRMPBF datasheet, LT3048EDC-5#TRMPBF pinout, LT3048EDC-5#TRMPBF application, or LT3048EDC-5#TRMPBF equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and noise performance data, and real-world application context for sensor biasing and precision op amp supply design.
Technical Context
The LT3048EDC-5#TRMPBF uses peak current-mode control in its boost stage with 1MHz fixed-frequency operation, enabling use of small inductors (e.g., 4.7µH) and predictable ripple. Its BSTOUT output is regulated to 1.1V above LDOOUT, optimizing LDO transient response and PSRR.
The integrated LDO operates with 1.235V feedback reference, 0.1% load regulation, and ultra-low noise (<50µVRMS at 10Hz–100kHz with 1nF BYP capacitor). Shutdown quiescent current is <1µA, and internal thermal/short-circuit protection ensures robust operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±1.5% over 100µA–40mA load and –40°C to 125°C |
| Input Voltage Range | 2.7V to 4.8V - compatible with single-cell Li-ion battery discharge profile |
| Max Output Current | 40mA - sufficient for biasing multiple precision sensors or op amps |
| Output Noise | 50µVRMS (10Hz–100kHz, CBYP = 1nF) - enables high-resolution ADC reference supplies |
| Switching Frequency | 1.00MHz typical - allows compact 4.7µH inductor and reduces EMI filtering burden |
| Ripple Rejection | 60dB at 1MHz - suppresses boost switching artifacts before LDO output |
| Quiescent Current | 600µA typical - balances efficiency and startup speed in always-on bias rails |
Pinout & Package
LT3048EDC-5#TRMPBF is housed in an 8-lead 2mm × 2mm plastic DFN package with exposed ground pad (Pin 9), requiring soldering to PCB ground for thermal and electrical integrity. θJA = 102°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Boost switch node | Anode of internal Schottky diode and collector of power transistor; high dv/dt node requiring minimal loop area |
| VIN (Pin 2) | Boost input supply | Accepts 2.7V–4.8V; must be bypassed locally to GND with low-ESR ceramic capacitor |
| GND (Pin 3) | Signal and power ground | Primary ground reference; exposed pad (Pin 9) is electrically identical and must be soldered |
| BYP (Pin 4) | Noise reduction terminal | Optional 1nF capacitor to LDOOUT reduces output noise and soft-starts LDO; no connection otherwise |
| LDOOUT (Pin 5) | Regulated 5V output | Fixed 5V output; requires ≥1µF low-ESR ceramic capacitor to GND for stability and transient response |
| LDOIN (Pin 6) | LDO input | Connected internally to BSTOUT; supplies LDO stage with voltage 1.1V above LDOOUT |
| EN (Pin 7) | Enable control | Logic-high (>1.25V) enables both regulators; logic-low (<0.4V) disables with <1µA shutdown current |
| BSTOUT (Pin 8) | Boost output | Regulated to 1.1V above LDOOUT (6.1V nominal); bypassed to GND to stabilize boost loop |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky diode | Eliminates external diode, reducing BOM count and PCB footprint in boost stage |
| Load disconnect in shutdown | Internal switch isolates LDOOUT from input during EN = low, preventing backfeed |
| Thermal and short-circuit protection | Auto-recovery shutdown prevents damage during overload or elevated ambient temperature |
| Low-noise BYP capacitor interface | 1nF capacitor between LDOOUT and BYP reduces output noise by >2× without altering feedback network |
| Optimized BSTOUT-LDOOUT delta | Fixed 1.1V headroom maximizes LDO PSRR while minimizing power dissipation under load transients |
Applications
| High-Precision Sensor Biasing | Low-Noise Op Amp Supply |
|---|---|
Use Scenario: Powering MEMS accelerometers or Hall-effect current sensors requiring stable, ultra-low-noise excitation voltage. IC Role / Device Role / Timing Role: Provides fixed 5V bias rail with <50µVRMS noise and 0.1% load regulation to minimize sensor offset drift and gain error. Use Value: Enables sub-16-bit effective resolution in analog front-ends without external post-regulation filtering. | Use Scenario: Supplying rail-to-rail input/output op amps in portable instrumentation where battery life and signal fidelity are critical. IC Role / Device Role / Timing Role: Delivers clean 5V supply with 60dB ripple rejection at 1MHz, suppressing switching artifacts that degrade amplifier THD. Use Value: Eliminates need for discrete LC filters or secondary LDOs, reducing solution size by >30% versus cascaded regulator approaches. |
| Portable Medical Instrumentation | Industrial IoT Signal Conditioning |
Use Scenario: Generating bias voltage for ECG/EEG front-end amplifiers in handheld diagnostic devices powered by Li-ion cells. IC Role / Device Role / Timing Role: Supplies 5V rail with <500µVP-P total output noise and load-disconnect capability to meet IEC 60601 leakage requirements. Use Value: Meets stringent EMC and safety standards without adding shielding or isolation components. | Use Scenario: Powering 4–20mA transmitter circuits and isolated ADC references in edge-node condition monitoring systems. IC Role / Device Role / Timing Role: Acts as primary bias source with 40mA drive capability and thermal protection for unattended 24/7 operation. Use Value: Ensures long-term reliability in sealed enclosures with limited airflow and ambient temperatures up to 85°C. |
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-3.3#TRMPBF | Fixed 3.3V output; same package, pinout, and noise performance; 120µVRMS noise at 3.3V | Used where system logic or ADC reference requires 3.3V instead of 5V | Select when target load voltage matches 3.3V and board layout allows direct substitution without feedback resistor changes |
| LT3048EDC-12#TRMPBF | Fixed 12V output; requires larger inductor (10µH) and higher BSTOUT voltage; 225µVRMS noise with 1nF BYP | Suitable for higher-voltage analog stages (e.g., photodiode bias, DAC buffers) | Choose only when 12V rail is required; verify inductor and capacitor ratings support higher voltage stress |
Compared with LT3048EDC-3.3#TRMPBF and LT3048EDC-12#TRMPBF, the LT3048EDC-5#TRMPBF offers optimal balance of output voltage headroom, efficiency (up to 70% at 3.6V input), and noise performance for mainstream 5V sensor and op amp applications - avoiding overdesign penalties of higher-voltage variants while delivering superior PSRR versus 3.3V option.
Availability
LT3048EDC-5#TRMPBF is available at Aetrix Electronics and suitable for high-precision sensor biasing, portable medical instrumentation, industrial IoT signal conditioning, and low-noise op amp supply applications requiring stable component supply across extended temperature ranges.
Supply support for LT3048EDC-5#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, automotive, communications, and healthcare markets.
The LT3048 series was designed specifically for ultra-low-noise bias generation in space-constrained, battery-powered systems - combining boost and LDO regulation in a single 2mm × 2mm DFN to replace multi-component discrete solutions.
FAQ
What is the guaranteed output voltage tolerance for LT3048EDC-5#TRMPBF over temperature and load?
The LT3048EDC-5#TRMPBF guarantees 5.00V ±1.5% over full operating conditions: –40°C to 125°C junction temperature and 100µA to 40mA load current. This is confirmed in the Electrical Characteristics table (page 3) under "LDOOUT Regulation Voltage" with min/max values of 4.925V and 5.075V at 100µA load, tightening to 4.875V–5.125V across full load range.
Can LT3048EDC-5#TRMPBF operate with input voltage below 2.7V?
No - LT3048EDC-5#TRMPBF has a specified minimum input voltage of 2.7V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.7V may result in failure to regulate, reduced efficiency, or undefined behavior; it is not characterized or guaranteed.
Does LT3048EDC-5#TRMPBF require an external feedback resistor divider?
No - LT3048EDC-5#TRMPBF is a fixed-output variant and does not use the FB pin. Unlike the adjustable LT3048, it connects LDOOUT directly to internal reference and omits FB functionality; Pin 5 is LDOOUT, Pin 6 is LDOIN, and Pin 4 (BYP) is optional noise-reduction terminal.
What is the maximum recommended inductor value for LT3048EDC-5#TRMPBF?
The datasheet specifies 4.7µH as the recommended inductor value for LT3048EDC-5#TRMPBF (Table 2, page 10). Larger values (e.g., 10µH) may reduce ripple but increase size, cost, and risk of saturation at peak current; smaller values compromise maximum load current and efficiency. DCR should be ≤350mΩ for optimal performance.
How does the BYP pin affect startup time and noise performance of LT3048EDC-5#TRMPBF?
Adding a 1nF capacitor between LDOOUT and BYP on LT3048EDC-5#TRMPBF reduces output noise by ~2× (from 145µVRMS to 50µVRMS) but increases startup time due to soft-start effect. The capacitor must be placed close to the pins; leaving BYP unconnected yields faster startup but higher broadband noise.
LT3048EDC-5#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:
- 6.1V, 300mA
- Voltage/Current - Output 2:
- 5V, 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-5#TRMPBF FAQ
1.How can I place an order for LT3048EDC-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3048EDC-5#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 LT3048EDC-5#TRMPBF reliable?
The price and inventory of LT3048EDC-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3048EDC-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3048EDC-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3048EDC-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3048EDC-5#TRMPBF?
LT3048EDC-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3048EDC-5#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 LT3048EDC-5#TRMPBF?
For technical support, including LT3048EDC-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3048EDC-5#TRMPBF requirements.
6.How does Aetrix verify that LT3048EDC-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3048EDC-5#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 LT3048EDC-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3048EDC-5#TRMPBF?
All LT3048EDC-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3048EDC-5#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 LT3048EDC-5#TRMPBF part is unused and in its original packaging.
Return procedure for LT3048EDC-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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