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Analog Devices Inc. LT3048EDC-5#TRPBF
- Part No.:
- LT3048EDC-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3048EDC-5#TRPBF.pdf
- Description:
- IC REG DL BOOST/LNR 2.2MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,110
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Product details
Overview
LT3048EDC-5#TRPBF from Analog Devices is a dual-stage bias generator integrating a 1MHz fixed-frequency boost regulator and a low-noise LDO linear regulator in an 8-lead 2mm × 2mm DFN package. It delivers a precise 5.00V ±0.125V output at up to 40mA from 2.7V–4.8V input, achieving <500µVP-P output ripple and 50µVRMS noise (with 1nF BYP capacitor), enabling high-fidelity sensor biasing in portable instrumentation.
For engineers reviewing the LT3048EDC-5#TRPBF datasheet, LT3048EDC-5#TRPBF pinout, LT3048EDC-5#TRPBF application, or LT3048EDC-5#TRPBF equivalent, key selection criteria include its 1.1V regulated BSTOUT–LDOOUT headroom, integrated Schottky diode, load disconnect in shutdown, and guaranteed –40°C to 125°C operation with thermal/short-circuit protection.
Technical Context
The LT3048EDC-5#TRPBF employs peak current-mode control for the boost stage and error amplifier regulation of BSTOUT to maintain a fixed 1.1V above LDOOUT, optimizing LDO transient response and ripple rejection. Its feedback loop references a precision 1.235V internal bandgap, enabling accurate 5V output via external resistor divider.
Unlike adjustable variants, the LT3048EDC-5#TRPBF uses a factory-trimmed internal feedback network to fix LDOOUT at 5.00V, eliminating external resistors while retaining all core features: programmable enable logic, BYP-capacitor noise reduction, and integrated switch/diode with 300–500mA current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±0.125V (100µA–40mA load); enables direct replacement of discrete LDO+boost solutions without resistor tuning. |
| Output Noise | 50µVRMS (10Hz–100kHz, 1nF BYP); supports ultra-low-noise op amp supplies and precision ADC reference buffers. |
| Switching Frequency | 1.00MHz typical (0.75–1.25MHz over temp); allows use of compact 4.7µH inductors and predictable EMI filtering. |
| Load Regulation | 12mV max (∆ILOAD = 100µA to 40mA); ensures stable 5V rail across full operating current range. |
| Quiescent Current | 600µA max (VIN active); maintains efficiency in battery-powered systems with intermittent high-current bursts. |
| Operating Input Range | 2.7V to 4.8V; compatible with single-cell Li-ion (3.0–4.2V) and regulated 3.3V system rails. |
| Package | 8-lead 2mm × 2mm DFN with exposed GND pad; provides 102°C/W θJA for thermal management in space-constrained PCBs. |
Pinout & Package
8-lead plastic DFN (2mm × 2mm) with exposed GND pad soldered to PCB ground. Pin 9 (exposed pad) is electrically connected to internal boost switch and must be grounded for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Boost switch node | Collector of internal NPN transistor and anode of integrated Schottky diode; requires tight layout with C2 bypass to minimize AC loop area. |
| VIN (Pin 2) | Boost input supply | Primary power source for boost stage; must be bypassed to GND with low-ESR ceramic capacitor. |
| GND (Pin 3) | Ground reference | Signal and power return for boost/LDO circuits; tied directly to exposed pad for lowest impedance path. |
| BYP (Pin 4) | Noise reduction terminal | Accepts optional 1nF capacitor to LDOOUT to reduce output noise and soft-start LDO; left open if unused. |
| LDOOUT (Pin 5) | Regulated 5V output | Fixed 5.00V supply rail; requires ≥1µF low-ESR ceramic output capacitor for stability and transient response. |
| LDOIN (Pin 6) | LDO input supply | Connected internally to BSTOUT; receives boosted voltage regulated 1.1V above LDOOUT for optimal LDO headroom. |
| EN (Pin 7) | Enable control | Logic-high (>1.25V) enables both regulators; logic-low (<0.4V) shuts down entire device with <1µA quiescent current. |
| BSTOUT (Pin 8) | Boost output | Regulated 6.1V (5V + 1.1V) supply for LDOIN; bypassed to GND to stabilize boost loop and reduce ripple injection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky diode | Eliminates external diode, reducing BOM count and PCB footprint while enabling efficient 1MHz switching. |
| Load disconnect in shutdown | Internal switch isolates LDOOUT from input during EN = low, preventing backfeed and enabling true system-level power gating. |
| 1.1V regulated BSTOUT–LDOOUT headroom | Optimizes LDO PSRR and transient response while minimizing power dissipation under overload conditions. |
| Thermal and short-circuit protection | Guarantees safe operation during sustained overloads or elevated ambient temperatures up to 125°C junction. |
| Low-noise BYP capacitor interface | 1nF capacitor between LDOOUT and BYP reduces output noise by >50% and improves start-up settling time. |
Applications
| High-Precision Sensor Biasing | Low-Noise Op Amp Supply |
|---|---|
Use Scenario: Powering MEMS accelerometers and piezoresistive pressure sensors in handheld medical diagnostics. IC Role / Device Role / Timing Role: Provides ultra-stable 5V bias with <500µVP-P ripple to minimize sensor offset drift and measurement uncertainty. Use Value: Enables 16-bit effective resolution in analog front-ends by suppressing supply-induced noise coupling into sensitive transducer interfaces. | Use Scenario: Supplying rail-to-rail input/output op amps in portable audio preamplifiers and EEG signal conditioners. IC Role / Device Role / Timing Role: Delivers clean 5V rail with 50µVRMS noise (10Hz–100kHz) to preserve dynamic range and SNR in analog signal paths. Use Value: Prevents audible hiss and baseline wander in audio/medical amplifiers by eliminating switching artifacts and thermal noise contributions. |
| Portable Instrumentation Power | Li-ion Powered Test Equipment |
Use Scenario: Generating calibrated 5V reference for handheld multimeters and portable oscilloscope front-ends. IC Role / Device Role / Timing Role: Acts as primary bias source with 0.1% load regulation and ±0.125V output tolerance over temperature and load. Use Value: Ensures measurement accuracy traceable to internal 1.235V reference, eliminating need for external trimming or calibration resistors. | Use Scenario: Powering digital logic and analog subsystems in battery-operated field test gear using single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Bridges input voltage gap between depleted battery (2.7V) and required 5V rail while maintaining >70% efficiency at 20mA. Use Value: Extends usable battery life by 35% versus discrete boost+LDO solutions due to integrated architecture and low quiescent current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-stage bias generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3048EDC-3.3#TRPBF | Fixed 3.3V output; identical pinout, package, and feature set except FB network and output voltage trim. | Used where 3.3V logic or I/O compatibility is required instead of 5V; same noise/efficiency specs but lower output headroom. | Select when system requires 3.3V rail with identical thermal performance and footprint; no PCB changes needed. |
| LT3048EDC-12#TRPBF | Fixed 12V output; same architecture and protection features, but optimized inductor (10µH) and higher BSTOUT voltage (13.1V). | Targets higher-voltage analog circuits (e.g., photodiode bias, DAC references) requiring >5V rails with low noise. | Choose for 12V applications needing sub-500µVP-P ripple; requires larger inductor and higher-voltage input capacitors. |
Compared with LT3048EDC-3.3#TRPBF and LT3048EDC-12#TRPBF, the LT3048EDC-5#TRPBF offers optimal balance of efficiency, noise, and compatibility with legacy 5V analog subsystems-delivering 50µVRMS noise at 40mA while maintaining 70%+ efficiency across the 2.7–4.8V input range.
Availability
LT3048EDC-5#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, medical sensor modules, and battery-powered test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for LT3048EDC-5#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 low-noise, high-PSRR bias generation in space-constrained portable systems-combining boost and LDO stages to overcome input voltage limitations while preserving signal integrity.
FAQ
What is the guaranteed output voltage tolerance of the LT3048EDC-5#TRPBF over temperature and load?
The LT3048EDC-5#TRPBF guarantees a 5.00V output with ±0.125V tolerance (±2.5%) across the full –40°C to 125°C junction temperature range and 100µA to 40mA load current. This specification is verified per Electrical Characteristics table on page 3 of the datasheet, where min/max values are 4.875V and 5.125V under load regulation conditions.
Does the LT3048EDC-5#TRPBF require external feedback resistors to set its 5V output?
No, the LT3048EDC-5#TRPBF does not require external feedback resistors. It integrates a factory-trimmed feedback network that fixes the output at 5.00V, unlike the adjustable LT3048 variant which uses pins FB and LDOOUT with external resistors. This eliminates component count and layout complexity for fixed-output designs.
How does the BYP pin function in the LT3048EDC-5#TRPBF, and what capacitor value is recommended?
The BYP pin in the LT3048EDC-5#TRPBF accepts an optional capacitor connected to LDOOUT to reduce output noise and provide soft-start functionality. A 1nF ceramic capacitor is recommended, which lowers RMS noise from 145µV to 50µV (10Hz–100kHz) and slows LDO turn-on to prevent inrush-related transients in sensitive downstream circuitry.
What is the maximum continuous output current supported by the LT3048EDC-5#TRPBF at 3.6V input?
At VIN = 3.6V, the LT3048EDC-5#TRPBF supports up to 40mA continuous output current while maintaining regulation and thermal safety. This is confirmed in the Typical Performance Characteristics (Figure G17, page 6) and Electrical Characteristics table, where load regulation is specified up to 40mA across all temperature ranges.
Can the LT3048EDC-5#TRPBF operate from a 2.7V input and still deliver 5V at full load?
Yes, the LT3048EDC-5#TRPBF is fully specified to operate from 2.7V input and deliver 5.00V at up to 40mA. At VIN = 2.7V, it achieves ~65% efficiency (per Figure TA05b, page 15) and maintains output regulation within ±0.125V, enabled by its 1MHz boost stage and integrated Schottky diode optimized for low-input operation.
LT3048EDC-5#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:
- 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#TRPBF FAQ
1.How can I place an order for LT3048EDC-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3048EDC-5#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-5#TRPBF reliable?
The price and inventory of LT3048EDC-5#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-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3048EDC-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3048EDC-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3048EDC-5#TRPBF?
LT3048EDC-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3048EDC-5#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-5#TRPBF?
For technical support, including LT3048EDC-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3048EDC-5#TRPBF requirements.
6.How does Aetrix verify that LT3048EDC-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3048EDC-5#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-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3048EDC-5#TRPBF?
All LT3048EDC-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3048EDC-5#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-5#TRPBF part is unused and in its original packaging.
Return procedure for LT3048EDC-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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