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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear + Switching

Analog Devices Inc. LT3048EDC-15#TRPBF

Name: LT3048EDC-15#TRPBF
Brand: Analog Devices Inc.
SKU: LT3048EDC-15#TRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LT3048EDC-15#TRPBF

Manufacturer:: Analog Devices Inc.

Category:: Voltage Regulators - Linear + Switching

Package:: 8-WFDFN Exposed Pad

Datasheet:: LT3048EDC-15#TRPBF.pdf

Description:: IC REG DL BOOST/LNR 2.2MHZ 8DFN

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Product details

Overview

LT3048EDC-15#TRPBF from Analog Devices is a dual-stage low-noise bias generator integrating a 2.2MHz boost regulator and a fixed 15V LDO linear regulator in an 8-lead 2mm × 2mm DFN package. It delivers up to 24mA output current with <60µV_RMS (10Hz–100kHz) noise and <500µV_P-P ripple from 2.7V–4.8V input, enabling precision sensor biasing and op amp supply in space-constrained portable instrumentation.

For engineers reviewing the LT3048EDC-15#TRPBF datasheet, LT3048EDC-15#TRPBF pinout, LT3048EDC-15#TRPBF application, or LT3048EDC-15#TRPBF equivalent, key selection criteria include its fixed 15V output, integrated Schottky diode, BSTOUT-to-LDOOUT regulation at 1.1V, load disconnect in shutdown, and thermal/short-circuit protection - all validated for –40°C to 125°C operation.

Technical Context

The LT3048EDC-15#TRPBF employs peak current-mode control in its boost stage for stable 2.2MHz switching and predictable ripple, while the LDO stage regulates LDOOUT to precisely 15.00V (±0.225V) over 100µA–24mA load. BSTOUT is actively regulated to 1.1V above LDOOUT (16.1V nominal), optimizing LDO transient response and PSRR.

Its architecture separates power path functions: SW drives the internal NPN switch and Schottky anode; BSTOUT supplies the LDOIN rail; BYP accepts a 1nF capacitor to reduce thermal noise and improve soft-start behavior; EN enables both stages with logic-level thresholds (V_EN-H = 1.25V, V_EN-L = 0.4V).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 15.00V ±0.225V (100µA–24mA load, –40°C to 125°C)
Max Output Current	24mA at VIN = 3.6V, LDOOUT = 15V - defines usable load range in battery-powered systems
Output Noise	<60µV_RMS (10Hz–100kHz, CBYP = 1nF) - enables high-resolution analog signal chains
Switching Frequency	2.2MHz typical - allows use of compact 10µH inductors and reduces EMI fundamental
BSTOUT Regulation	1.1V above LDOOUT (±0.1V) - ensures optimal LDO headroom for ripple rejection & transient response
Quiescent Current	20µA LDO + 600µA boost (VIN quiescent) - supports ultra-low-power standby modes
Package	8-lead 2mm × 2mm DFN with exposed GND pad - provides 102°C/W θ_JA thermal resistance

Pinout & Package

LT3048EDC-15#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	Collector of internal NPN transistor and anode of integrated Schottky diode - connects to inductor and BSTOUT bypass capacitor
VIN (Pin 2)	Input supply	Primary power input for boost regulator (2.7V–4.8V); must be bypassed to GND with low-ESR capacitor
GND (Pin 3)	Ground reference	Signal and power ground for boost/LDO circuits; tied to exposed pad (Pin 9)
BYP (Pin 4)	Noise reduction terminal	Accepts optional 1nF capacitor to LDOOUT to suppress thermal noise and control soft-start timing
LDOOUT (Pin 5)	Regulated output	Fixed 15V output; requires ≥1µF ceramic output capacitor (X5R/X7R) for stability and transient response
LDOIN (Pin 6)	LDO input rail	Supplied by BSTOUT; establishes 1.1V headroom over LDOOUT for optimal LDO performance
EN (Pin 7)	Enable control	Logic input: high ≥1.25V enables regulators; low ≤0.4V disables both stages and disconnects load
BSTOUT (Pin 8)	Boost output	Regulated 16.1V rail (15V + 1.1V); powers LDOIN and must be bypassed with 4.7µF ceramic capacitor

Key Features

Feature	Design Value
Integrated Schottky diode	Eliminates external diode, reducing BOM count and PCB area while enabling efficient 2.2MHz operation
Load disconnect in shutdown	Q2 isolates LDOOUT from BSTOUT when EN is low, preventing backfeed and enabling true system power gating
Thermal & short-circuit protection	Automatic foldback current limiting and thermal shutdown prevent damage during overload or ambient extremes
Low-noise BYP terminal	1nF capacitor between LDOOUT and BYP reduces output noise by >75% and improves start-up settling time
Stable with ceramic output caps	Guaranteed stability with ≥1µF X5R/X7R capacitors (ESR ≤1Ω), simplifying layout and eliminating tantalum dependencies

Applications

High-Voltage Sensor Bias	Low-Noise Op Amp Supply
Use Scenario: Powering piezoelectric sensors or MEMS accelerometers requiring clean 15V bias in handheld test equipment. IC Role / Device Role / Timing Role: Provides regulated, low-noise 15V rail isolated from noisy digital supply domains. Use Value: <60µV_RMS noise and <500µV_P-P ripple preserve sensor SNR and measurement resolution.	Use Scenario: Supplying rail-to-rail input/output op amps in portable audio preamps or medical front-ends. IC Role / Device Role / Timing Role: Delivers fixed 15V with fast transient response to maintain amplifier linearity under dynamic load. Use Value: 1.1V BSTOUT-to-LDOOUT headroom enables >60dB ripple rejection at 1MHz, suppressing switching artifacts.
Single-Cell Li-Ion Bias Generation	Portable Instrumentation Power
Use Scenario: Generating 15V bias from a 3.3V nominal single-cell Li-ion battery in field-deployable analyzers. IC Role / Device Role / Timing Role: Combines boost + LDO to step up and filter battery voltage without external diodes or regulators. Use Value: 2.2MHz switching allows 10µH inductor size reduction by 50% vs. 1MHz alternatives, saving board space.	Use Scenario: Powering mixed-signal subsystems (ADC drivers, reference buffers) in battery-operated oscilloscopes. IC Role / Device Role / Timing Role: Supplies clean 15V with load disconnect to isolate analog sections during sleep mode. Use Value: <1µA shutdown current and EN-controlled isolation extend battery life beyond 100 hours in standby.

High-Voltage Sensor Bias

Low-Noise Op Amp Supply

Use Scenario: Powering piezoelectric sensors or MEMS accelerometers requiring clean 15V bias in handheld test equipment.

IC Role / Device Role / Timing Role: Provides regulated, low-noise 15V rail isolated from noisy digital supply domains.

Use Value: <60µV_RMS noise and <500µV_P-P ripple preserve sensor SNR and measurement resolution.

Use Scenario: Supplying rail-to-rail input/output op amps in portable audio preamps or medical front-ends.

IC Role / Device Role / Timing Role: Delivers fixed 15V with fast transient response to maintain amplifier linearity under dynamic load.

Use Value: 1.1V BSTOUT-to-LDOOUT headroom enables >60dB ripple rejection at 1MHz, suppressing switching artifacts.

Single-Cell Li-Ion Bias Generation

Portable Instrumentation Power

Use Scenario: Generating 15V bias from a 3.3V nominal single-cell Li-ion battery in field-deployable analyzers.

IC Role / Device Role / Timing Role: Combines boost + LDO to step up and filter battery voltage without external diodes or regulators.

Use Value: 2.2MHz switching allows 10µH inductor size reduction by 50% vs. 1MHz alternatives, saving board space.

Use Scenario: Powering mixed-signal subsystems (ADC drivers, reference buffers) in battery-operated oscilloscopes.

IC Role / Device Role / Timing Role: Supplies clean 15V with load disconnect to isolate analog sections during sleep mode.

Use Value: <1µA shutdown current and EN-controlled isolation extend battery life beyond 100 hours in standby.

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
LT3048IDC-15#TRPBF	Same circuit architecture and pinout; rated for –40°C to 125°C with full guaranteed specs across temperature	Required for industrial systems operating continuously at >85°C ambient	Select when full temperature-range validation is mandatory; otherwise LT3048EDC-15#TRPBF suffices for commercial-grade designs
LT3095EDD#TRPBF	Dual-channel 1V–20V adjustable bias generator; 450kHz–2MHz programmable frequency; 4µV_RMS noise	Supports dual-rail (±15V) or asymmetric outputs; lacks fixed 15V option and integrated Schottky	Choose for multi-voltage systems needing flexibility; avoid if single fixed 15V and minimal BOM are priorities

Compared with LT3048IDC-15#TRPBF, the LT3048EDC-15#TRPBF offers identical functionality at lower cost for commercial-temperature applications, while LT3095EDD#TRPBF trades simplicity and fixed-output convenience for dual-channel adjustability and lower noise - making it suitable only where those features justify added complexity.

Availability

LT3048EDC-15#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, high-precision sensor interfaces, and battery-powered test equipment requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for LT3048EDC-15#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 precision instrumentation, industrial automation, and communications markets.

The LT3048 series was designed specifically for low-noise, high-voltage bias generation in space-constrained portable systems, combining boost conversion efficiency with LDO cleanliness in a miniature DFN package.

FAQ

What is the maximum output current capability of the LT3048EDC-15#TRPBF?

The LT3048EDC-15#TRPBF delivers up to 24mA output current when VIN = 3.6V and LDOOUT = 15V, as confirmed in the Electrical Characteristics table (Rev B datasheet, page 3). This value decreases at lower input voltages - e.g., 19mA at VIN = 2.7V - due to reduced boost converter efficiency and duty cycle limitations.

Does the LT3048EDC-15#TRPBF require an external Schottky diode?

No, the LT3048EDC-15#TRPBF integrates a Schottky diode internally, as explicitly stated in the FEATURES section and PIN FUNCTIONS description (page 8). This eliminates the need for an external diode, reducing component count, PCB area, and potential layout sensitivity associated with discrete diode placement.

How does the BYP pin function in the LT3048EDC-15#TRPBF?

The BYP pin on the LT3048EDC-15#TRPBF accepts an optional 1nF capacitor connected to LDOOUT to reduce thermal noise and improve transient response. As shown in Figure 1b and detailed on page 11, this capacitor lowers output noise by >75% and provides controlled soft-start behavior, though it increases regulator start-up time.

What is the purpose of the BSTOUT pin on the LT3048EDC-15#TRPBF?

The BSTOUT pin on the LT3048EDC-15#TRPBF is the regulated output of the internal boost converter, maintained at 1.1V above LDOOUT (i.e., 16.1V for the -15 variant). It supplies the LDOIN rail and must be bypassed with a 4.7µF ceramic capacitor to ensure stable boost regulation and minimize ripple coupling into the LDO stage.

Is the LT3048EDC-15#TRPBF pin-compatible with other LT3048-XX variants?

Yes, the LT3048EDC-15#TRPBF shares identical pin configuration and package (8-lead 2mm × 2mm DFN) with all LT3048-XX fixed-output variants (e.g., -3.3, -5, -12), as confirmed in the PIN CONFIGURATION diagrams (pages 2–3) and ORDER INFORMATION table. Only the feedback network differs - absent in fixed-output versions - enabling direct PCB reuse across output voltages.

LT3048EDC-15#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:: 16.1V, 300mA

Voltage/Current - Output 2:: 15V, 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-15#TRPBF FAQ

1.How can I place an order for LT3048EDC-15#TRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LT3048EDC-15#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-15#TRPBF reliable?

The price and inventory of LT3048EDC-15#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-15#TRPBF is usually 5 days.

3.What payment methods are accepted for LT3048EDC-15#TRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3048EDC-15#TRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LT3048EDC-15#TRPBF?

LT3048EDC-15#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LT3048EDC-15#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-15#TRPBF?

For technical support, including LT3048EDC-15#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3048EDC-15#TRPBF requirements.

6.How does Aetrix verify that LT3048EDC-15#TRPBF is sourced from the original manufacturer or authorized distributors?

All LT3048EDC-15#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-15#TRPBF meets industry standards.

7.What is the process for return or replacement of LT3048EDC-15#TRPBF?

All LT3048EDC-15#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3048EDC-15#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-15#TRPBF part is unused and in its original packaging.

Return procedure for LT3048EDC-15#TRPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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