My Inquiry
My Account
Analog Devices Inc. LT3048IDC-12#TRPBF
- Part No.:
- LT3048IDC-12#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3048IDC-12#TRPBF.pdf
- Description:
- IC REG DL BOOST/LNR 2.2MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,286
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3048IDC-12#TRPBF 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 delivers a fixed 12V output at up to 31mA from 2.7V–4.8V input, achieves <225µVRMS (10Hz–100kHz) noise with 1nF BYP capacitor, and provides 1.1V regulated BSTOUT–LDOOUT headroom for optimal ripple rejection-ideal for precision op amp supply in portable instrumentation.
For engineers reviewing the LT3048IDC-12#TRPBF datasheet, LT3048IDC-12#TRPBF pinout, LT3048IDC-12#TRPBF application, or LT3048IDC-12#TRPBF equivalent, key selection criteria include fixed 12V output accuracy (±1.5% over load/temperature), integrated Schottky diode, load disconnect in shutdown (<1µA quiescent current), and thermal/short-circuit protection-critical for battery-powered sensor front-ends and analog signal chains requiring ultra-low noise and stable bias.
Technical Context
The LT3048IDC-12#TRPBF employs peak current-mode control in its boost stage, enabling predictable 1MHz switching frequency and stable operation with small inductors (10µH recommended). Its LDO input (LDOIN) is supplied by BSTOUT, which is actively regulated to 1.1V above LDOOUT-ensuring consistent headroom for high PSRR and fast transient response independent of input voltage variation.
Unlike adjustable variants, the LT3048IDC-12#TRPBF uses internal feedback to fix LDOOUT at 12.00V (±1.5% over 100µA–31mA load and –40°C to 125°C), eliminating external resistor networks. The BYP pin accepts a 1nF capacitor to reduce output noise by >65% and improve soft-start behavior, while EN enables full system power gating with <1µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.00V ±1.5% (100µA–31mA, –40°C to 125°C); eliminates need for external feedback resistors and reduces layout sensitivity. |
| Output Noise | <225µVRMS (10Hz–100kHz) with 1nF BYP capacitor; enables direct powering of low-noise op amps and ADC references without additional filtering. |
| Input Range | 2.7V to 4.8V; compatible with single-cell Li-ion (fully charged to depleted) and regulated 3.3V system rails. |
| Switching Frequency | 1.00MHz typical (0.75–1.25MHz over temp); allows use of compact 10µH inductors and minimizes EMI in sensitive analog sections. |
| Load Current | Up to 31mA continuous (guaranteed at VIN = 3.6V, LDOOUT = 12V); sufficient for biasing multiple precision amplifiers or MEMS sensors. |
| BSTOUT–LDOOUT Regulation | 1.1V ±0.1V; maintains optimal LDO headroom across line/load/temperature, preserving PSRR >60dB at 1MHz and minimizing dropout-related dissipation. |
| Shutdown Quiescent Current | <1µA with EN ≤ 0.4V; supports long-term battery standby in portable medical or IoT edge devices. |
Pinout & Package
LT3048IDC-12#TRPBF is housed in an 8-lead (2mm × 2mm) plastic DFN package with exposed thermal pad (Pin 9, GND). The package requires soldering of the exposed pad to PCB ground for thermal performance (θJA = 102°C/W) and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Boost switch node | Collector of internal NPN power transistor and anode of integrated Schottky diode; high-frequency AC node requiring minimal loop area with BSTOUT bypass capacitor. |
| VIN (Pin 2) | Boost regulator input | Supplies operating current to boost stage; must be bypassed to GND with low-ESR ceramic capacitor (e.g., 1µF). |
| GND (Pin 3) | Signal and power ground | Primary ground reference for control circuitry; must be connected to PCB ground plane and exposed pad. |
| BYP (Pin 4) | Noise reduction terminal | Accepts optional 1nF capacitor to LDOOUT to reduce output noise by >65% and provide controlled soft-start; left open if not used. |
| LDOOUT (Pin 5) | Fixed 12V output | Regulated 12.00V output; requires ≥1µF low-ESR ceramic capacitor to GND for stability and transient response. |
| LDOIN (Pin 6) | LDO input supply | Connected internally to BSTOUT; supplies LDO stage-regulated 13.1V nominal (12V + 1.1V) ensures optimal headroom and PSRR. |
| EN (Pin 7) | Enable control | Active-high logic input; drives high to enable regulators, low (≤0.4V) to disable with <1µA quiescent current and load disconnect. |
| BSTOUT (Pin 8) | Boost regulator output | Regulated output supplying LDOIN; maintained at 1.1V above LDOOUT; 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 while maintaining efficiency in boost stage. |
| 1.1V regulated BSTOUT–LDOOUT headroom | Ensures consistent LDO performance across input voltage range, maximizing PSRR and minimizing thermal stress during overload. |
| 1nF BYP capacitor support | Reduces output voltage noise from 225µVRMS to 60µVRMS, enabling direct use in sub-10µVPP analog signal paths. |
| Load disconnect in shutdown | Isolates LDOOUT from input during EN = low, preventing backfeed and enabling true system-level power sequencing. |
| Thermal and short-circuit protection | Automatically limits power dissipation and disables output under fault conditions, protecting downstream circuitry without external components. |
Applications
| Portable Instrumentation Power | Precision Op Amp Bias |
|---|---|
Use Scenario: Battery-powered handheld multimeters and portable oscilloscopes requiring clean, stable analog supply rails. IC Role / Device Role / Timing Role: Dual-stage bias generator delivering fixed 12V for analog front-end amplifiers and reference buffers. Use Value: <225µVRMS noise and ±1.5% output accuracy ensure measurement fidelity without post-regulation filtering. |
Use Scenario: Low-noise instrumentation-grade op amps (e.g., LT1028, ADA4898) in data acquisition systems. IC Role / Device Role / Timing Role: Fixed 12V LDOOUT supply with 1.1V headroom and integrated BYP capacitor support. Use Value: Eliminates external noise-reduction components while maintaining PSRR >60dB at 1MHz switching frequency. |
| Sensor Signal Conditioning | Medical Sensor Front-Ends |
Use Scenario: MEMS accelerometers and pressure sensors in industrial condition monitoring nodes. IC Role / Device Role / Timing Role: Low-quiescent, fixed-output bias source powering sensor excitation and signal chain amplification. Use Value: 31mA output capability and <1µA shutdown current extend battery life in wireless sensor nodes. |
Use Scenario: Portable ECG and EEG monitors requiring ultra-low-noise analog bias under strict EMC constraints. IC Role / Device Role / Timing Role: Primary 12V bias generator with integrated Schottky and thermal protection. Use Value: 2mm × 2mm DFN footprint and no external feedback resistors simplify FDA-compliant PCB layout and reduce risk of contamination. |
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-12#TRPBF | E-grade (0°C to 125°C) vs. I-grade (–40°C to 125°C); identical electrical specs and pinout. | Not suitable for extended industrial or automotive ambient temperature ranges requiring –40°C startup. | Select LT3048IDC-12#TRPBF for designs operating below 0°C or requiring guaranteed performance across full industrial range. |
| LT3095EDD#TRPBF | Dual-channel, adjustable 1V–20V outputs, 450kHz–2MHz programmable frequency, 4µVRMS noise, 24-lead QFN. | Requires external resistors and more board space; suited for multi-rail systems needing independent bias voltages. | Choose LT3048IDC-12#TRPBF when only a single fixed 12V rail is needed and minimal footprint/no external components are critical. |
Compared with LT3048EDC-12#TRPBF, the LT3048IDC-12#TRPBF guarantees full –40°C to 125°C operation without derating, while versus LT3095EDD#TRPBF it offers half the package size, zero external components, and simpler layout-making it optimal for space-constrained single-rail applications where 12V precision and ultra-low noise are mandatory.
Availability
LT3048IDC-12#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation power, precision op amp bias, and sensor signal conditioning requiring stable component supply, guaranteed industrial temperature operation, and long-term production continuity.
Supply support for LT3048IDC-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 precision instrumentation, industrial automation, and medical electronics markets.
The LT3048 series was designed specifically for ultra-low-noise bias generation in portable and space-constrained analog systems, combining boost conversion and LDO regulation in a single 2mm × 2mm package to eliminate external components and minimize EMI.
FAQ
What is the guaranteed output voltage tolerance of the LT3048IDC-12#TRPBF over temperature and load?
The LT3048IDC-12#TRPBF delivers 12.00V with ±1.5% tolerance across the full –40°C to 125°C junction temperature range and for load currents from 100µA to 31mA. This specification is guaranteed by design and characterization-not just typical-and applies to all units in the I-grade temperature range without derating.
Can the LT3048IDC-12#TRPBF operate from a 2.5V input?
No-the LT3048IDC-12#TRPBF has a minimum input voltage of 2.7V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.7V is not specified and may result in failure to regulate or unexpected shutdown behavior.
Does the LT3048IDC-12#TRPBF require an external feedback resistor network?
No-the LT3048IDC-12#TRPBF is a fixed-output variant with internal feedback; no external resistors are needed. Pin 5 (LDOOUT) delivers 12V directly, and Pin 4 (BYP) accepts only an optional 1nF capacitor for noise reduction-not a feedback element.
What is the purpose of the BYP pin on the LT3048IDC-12#TRPBF?
The BYP pin on the LT3048IDC-12#TRPBF accepts an optional 1nF capacitor between LDOOUT and BYP to reduce output voltage noise by >65% (from 225µVRMS to 60µVRMS) and provide controlled soft-start. Leaving BYP unconnected results in higher noise but faster startup.
How does the LT3048IDC-12#TRPBF handle overcurrent or thermal faults?
The LT3048IDC-12#TRPBF incorporates both short-circuit protection and thermal shutdown. Under overload, the LDO enters current limit, causing LDOOUT voltage to drop; simultaneously, the boost regulator reduces BSTOUT to minimize Q2 dissipation. If junction temperature exceeds 125°C, thermal shutdown disables both regulators until safe temperature is restored.
LT3048IDC-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)
LT3048IDC-12#TRPBF FAQ
1.How can I place an order for LT3048IDC-12#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3048IDC-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 LT3048IDC-12#TRPBF reliable?
The price and inventory of LT3048IDC-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 LT3048IDC-12#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3048IDC-12#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3048IDC-12#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3048IDC-12#TRPBF?
LT3048IDC-12#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3048IDC-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 LT3048IDC-12#TRPBF?
For technical support, including LT3048IDC-12#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3048IDC-12#TRPBF requirements.
6.How does Aetrix verify that LT3048IDC-12#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3048IDC-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 LT3048IDC-12#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3048IDC-12#TRPBF?
All LT3048IDC-12#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3048IDC-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 LT3048IDC-12#TRPBF part is unused and in its original packaging.
Return procedure for LT3048IDC-12#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3048IDC-12#TRPBF Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
