My Inquiry
My Account
Analog Devices Inc. LTC3411AEDD#TRPBF
- Part No.:
- LTC3411AEDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3411AEDD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,469
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3411AEDD#TRPBF from Analog Devices is a 1.25A, 4MHz synchronous step-down DC/DC converter operating from 2.5V to 5.5V input, delivering adjustable output from 0.8V to 5.5V with internal 0.15Ω P-channel and 0.13Ω N-channel MOSFETs. It features current-mode control, external compensation, Burst Mode operation (IQ = 40µA), and 100% duty-cycle dropout for battery-powered notebook computers and handheld instruments.
For engineers reviewing the LTC3411AEDD#TRPBF datasheet, LTC3411AEDD#TRPBF pinout, LTC3411AEDD#TRPBF application, or LTC3411AEDD#TRPBF equivalent, this page delivers verified technical context, package-validated pin functions, real-world efficiency curves, confirmed alternative options, and supply-chain support details specific to the 3mm × 3mm DFN-10 (DD) variant.
Technical Context
The LTC3411AEDD#TRPBF implements a constant-frequency current-mode architecture with user-programmable oscillator frequency up to 4MHz via RT resistor or external SYNC clock. Its dual-MOSFET synchronous rectification eliminates external diode losses and enables high efficiency across load range.
Operation modes are selected via SYNC/MODE pin voltage: 0.6V enables Burst Mode (40µA IQ), SVIN/2 enables forced continuous conduction, and SGND enables pulse skipping. The ITH pin provides direct error amplifier output access for loop compensation and soft-start control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V rail inputs without pre-regulation. |
| Output Voltage Range | 0.8V to 5.5V - set by external resistive divider; 0.8V reference enables low-voltage core logic and memory rails. |
| Max Output Current | 1.25A - sustained delivery with thermal derating in 3mm × 3mm DFN package (θJA = 43°C/W). |
| Switching Frequency | Up to 4MHz - enables use of sub-2.2µH inductors and ≤10µF ceramic output capacitors for ultra-compact layouts. |
| RDS(ON) Top/Bottom | 0.15Ω / 0.13Ω - low conduction loss ensures ≥96% peak efficiency at 1.25A, 3.6V→1.8V conversion. |
| Quiescent Current | 40µA in Burst Mode - extends battery runtime in standby or light-load states (e.g., display backlight off). |
| Feedback Reference | 0.8V ±2% - tight tolerance enables accurate output regulation across temperature and line/load variation. |
Pinout & Package
Package: 10-lead 3mm × 3mm plastic DFN (DD) with exposed PGND pad (Pin 11), rated for –40°C to 125°C junction temperature. Thermal resistance θJA = 43°C/W; exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN/RT (1) | Shutdown enable & oscillator timing | Pulling to SVIN disables device; resistor to GND sets fOSC (125kΩ → 2.5MHz); no external capacitor needed. |
| SYNC/MODE (2) | Mode selection & clock sync input | Voltage level selects Burst Mode (0.6V), Pulse Skip (GND), or Forced Continuous (SVIN/2); accepts external 0.4–4MHz clock. |
| SGND (3) | Signal ground reference | Reference for VFB, ITH, PGOOD; must be isolated from power ground until star-point connection to minimize noise coupling. |
| SW (4) | Switch node | Connects to inductor; swings from PVIN to PGND; requires low-inductance layout to suppress ringing and EMI. |
| PGND (5) | Main power ground | Return path for CIN, COUT, and SW node; must be low-impedance copper pour tied to exposed pad (Pin 11). |
| PVIN (6) | Main power input | High-current VIN path; decouple directly to PGND with ≥10µF ceramic capacitor placed <2mm from pin. |
| SVIN (7) | Signal power supply | Bias rail for internal analog circuitry; must be ≥PVIN and decoupled to SGND with 1µF ceramic capacitor. |
| PGOOD (8) | Power-good open-drain output | Pulls low when VOUT deviates >±7% from regulation; 40µs blanking prevents false triggers during transients. |
| VFB (9) | Feedback input | Compares divided VOUT to 0.8V reference; input bias current ±0.1µA enables high-impedance resistor dividers. |
| ITH (10) | Error amplifier output & soft-start control | Voltage (0.4–1.4V) sets peak inductor current; external RC on this pin programs soft-start time (~0.8ms). |
Key Features
| Feature | Design Value |
|---|---|
| 4MHz max switching frequency | Enables 1mm-height inductors and compact 10µF ceramic output caps-reducing board area by >40% vs 1MHz designs. |
| Stable with ceramic output capacitors | No ESR dependency in control loop allows use of low-ESR, high-reliability ceramics instead of tantalum or polymer caps. |
| Selectable Burst Mode (25mVP-P ripple) | Reduces IQ to 40µA while maintaining low output ripple-ideal for always-on subsystems in portable devices. |
| 100% duty-cycle dropout operation | Maintains regulation down to VIN ≈ VOUT + RDS(ON)•IOUT-critical for battery voltage sag during peak loads. |
| Short-circuit protected | Current-limit threshold of 1.6–2.6A prevents damage during output fault conditions without external sensing. |
Applications
| Portable Computing Power | Digital Camera Core Supply |
|---|---|
Use Scenario: Regulating 3.3V or 1.8V rails for CPU, GPU, or memory in ultrabooks and 2-in-1 tablets with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary synchronous buck regulator managing dynamic load steps up to 1.25A while maintaining <±1% output accuracy. Use Value: 4MHz operation shrinks passive size; Burst Mode extends battery life during idle; 100% duty cycle sustains operation as battery discharges to 3.0V. |
Use Scenario: Powering image sensor, ISP, and LCD controller in DSLR or mirrorless cameras requiring low-noise, fast-transient response. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with forced continuous mode to fix switching frequency for predictable EMI filtering. Use Value: 0.15Ω/0.13Ω RDS(ON) minimizes heat in sealed enclosures; PGOOD enables safe sequencing with FPGA or microcontroller. |
| Cellular Baseband Supply | Handheld Test Instrumentation |
Use Scenario: Delivering clean 1.2V core voltage to LTE/5G baseband processors with bursty traffic patterns and strict thermal limits. IC Role / Device Role / Timing Role: Adaptive buck converter switching between Burst Mode (low IQ) and forced continuous (low ripple) based on RF activity. Use Value: SYNC/MODE pin enables real-time mode switching; ±7% PGOOD window ensures reliable processor reset signaling. |
Use Scenario: Generating stable 2.5V or 3.3V supplies for precision ADCs, DACs, and op-amps in portable multimeters or spectrum analyzers. IC Role / Device Role / Timing Role: Low-noise, low-drift DC/DC source with external compensation for optimal transient response to measurement-triggered load changes. Use Value: 0.8V reference tolerance (±2%) and <0.2%/V line regulation ensure <10ppm output drift over input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | Fixed 3.3V output; 3.6V–17V input; 3MHz max fSW; 0.11Ω/0.12Ω RDS(ON); no SYNC/MODE pin. | Not adjustable; higher VIN range suits industrial 12V systems but lacks low-VIN capability for Li-ion. | Choose for fixed-output, wide-input applications where programmability and sub-3V operation are unnecessary. |
| MP2143DJ-LF-Z | 1.2A max; 2.5V–6V input; 2.2MHz fSW; 0.15Ω/0.12Ω RDS(ON); no Burst Mode; PGOOD active-high. | Lacks low-IQ sleep mode; different pinout; no external frequency programming or SYNC input. | Choose for cost-sensitive designs needing basic 2.2MHz buck without advanced power management features. |
Compared with LTC3411AEDD#TRPBF, TPS62130ARGTR offers wider input range but sacrifices output adjustability and Li-ion compatibility, while MP2143DJ-LF-Z provides lower BOM cost but omits Burst Mode, SYNC, and precise PGOOD thresholds-making LTC3411AEDD#TRPBF optimal for compact, battery-optimized, multi-mode portable power.
Availability
LTC3411AEDD#TRPBF is available at Aetrix Electronics and suitable for notebook computers, digital cameras, and cellular phones requiring stable component supply, long-lifecycle availability, and guaranteed RoHS-compliant manufacturing.
Supply support for LTC3411AEDD#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LTC3411A belongs to Analog Devices' Power Management product line, designed specifically for high-frequency, high-efficiency DC/DC conversion in space-constrained portable electronics with demanding battery-life and thermal requirements.
FAQ
What is the maximum supported switching frequency for LTC3411AEDD#TRPBF?
The LTC3411AEDD#TRPBF supports up to 4MHz switching frequency, programmable via the RT resistor or external SYNC clock. While 4MHz operation is guaranteed by design, production testing covers up to 2.8MHz; full 4MHz use requires validation under worst-case duty cycle and thermal conditions per the datasheet's fO(MAX) equation.
Does LTC3411AEDD#TRPBF support prebiased output startup?
Yes, LTC3411AEDD#TRPBF supports prebiased output startup in forced continuous mode. When enabled via SYNC/MODE pin, the device safely regulates into an already charged output without reverse current flow or output overshoot, critical for hot-swap and multi-rail sequencing applications.
What is the thermal performance difference between the DD and MSOP packages for LTC3411AEDD#TRPBF?
The LTC3411AEDD#TRPBF in 3mm × 3mm DFN (DD) package has θJA = 43°C/W, while the MSOP variant has θJA = 120°C/W. This 2.8× better thermal resistance enables the DD package to sustain 1.25A continuously at higher ambient temperatures-essential for thermally dense portable designs.
Can LTC3411AEDD#TRPBF operate with ceramic input and output capacitors only?
Yes, LTC3411AEDD#TRPBF is explicitly designed for stability with ceramic capacitors on both input and output. Its current-mode control loop does not rely on output capacitor ESR, eliminating need for tantalum or polymer alternatives-reducing cost, size, and failure risk.
What protection features are integrated into LTC3411AEDD#TRPBF?
LTC3411AEDD#TRPBF integrates short-circuit protection (1.6–2.6A current limit), undervoltage lockout (2.1V typical), overtemperature shutdown (>125°C), and PGOOD monitoring with ±7% output voltage window and 40µs blanking. No external components are required to enable these protections.
LTC3411AEDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1.25A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC3411AEDD#TRPBF FAQ
1.How can I place an order for LTC3411AEDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3411AEDD#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 LTC3411AEDD#TRPBF reliable?
The price and inventory of LTC3411AEDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3411AEDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3411AEDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3411AEDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3411AEDD#TRPBF?
LTC3411AEDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3411AEDD#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 LTC3411AEDD#TRPBF?
For technical support, including LTC3411AEDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3411AEDD#TRPBF requirements.
6.How does Aetrix verify that LTC3411AEDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3411AEDD#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 LTC3411AEDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3411AEDD#TRPBF?
All LTC3411AEDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3411AEDD#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 LTC3411AEDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3411AEDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3411AEDD#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
