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Analog Devices Inc. LTC3419EDD-1#TRPBF
- Part No.:
- LTC3419EDD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC3419EDD-1#TRPBF.pdf
- Description:
- IC REG BUCK 1.575V/1.8V DL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,514
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Product details
Overview
LTC3419EDD-1#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, monolithic synchronous step-down DC/DC converter in a 3mm × 3mm DFN-8 package, delivering up to 600mA per channel with 2.25MHz fixed-frequency operation, 0.6V feedback reference, and 2.5V–5.5V input range. It supports low-voltage rails (e.g., 1.575V/1.8V outputs) for portable power management in battery-powered systems.
For engineers reviewing the LTC3419EDD-1#TRPBF datasheet, LTC3419EDD-1#TRPBF pinout, LTC3419EDD-1#TRPBF application, or LTC3419EDD-1#TRPBF equivalent, this page delivers verified specifications, validated pin functions, confirmed fixed-output behavior, thermal design constraints for 100% duty cycle operation, and real-world efficiency vs. load data across VIN and VOUT conditions.
Technical Context
The LTC3419EDD-1#TRPBF implements a constant-frequency current-mode control architecture with shared 2.25MHz clock and in-phase dual-channel operation. Each regulator features independent soft-start, internal compensation for ceramic output capacitors, and selectable Burst Mode® or pulse-skipping via the MODE pin.
It uses integrated P-channel high-side and N-channel low-side MOSFETs with typical RDS(ON) of 0.4Ω (top) and 0.4Ω (bottom) at VIN = 3.6V, enabling high-efficiency conversion down to light loads while maintaining short-circuit protection and dropout operation at 100% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion and USB 5V supplies without external LDO pre-regulation. |
| Output Voltage (Fixed) | VOUT1 = 1.575V ±1.5%, VOUT2 = 1.8V ±1.5% - factory-trimmed internal resistor dividers eliminate external feedback components. |
| Max Output Current | 600mA per channel - sustained delivery under continuous conduction mode with thermal derating above 85°C junction temperature. |
| Switching Frequency | 2.25MHz (±25%) - enables use of ≤4.7μH inductors and compact 10μF ceramic output capacitors. |
| Quiescent Current | 35μA (both channels active) - extends runtime in always-on subsystems such as modem standby or sensor wake logic. |
| Shutdown Current | <1μA - ensures negligible battery drain during deep sleep states in portable devices. |
| Feedback Reference | 0.6V - supports output voltages as low as 0.6V with external resistive divider; fixed versions retain same reference internally. |
Pinout & Package
Package: 8-lead 3mm × 3mm plastic DFN (DD), 0.75mm profile, exposed pad (Pin 9) soldered to PCB ground for thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Regulator 1 feedback input | Internally connected to 0.6V reference; tied directly to VOUT1 in fixed-output LTC3419EDD-1#TRPBF configuration. |
| RUN1 (Pin 2) | Regulator 1 enable control | High (≥1V) enables Channel 1; low (≤0.4V) forces shutdown with <1μA quiescent draw. |
| MODE (Pin 3) | Light-load operation mode select | Ground = Burst Mode® (high efficiency at light loads); VIN = pulse-skipping (low ripple, constant frequency). |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor; swings between VIN and GND; requires low-inductance layout to minimize EMI and shoot-through risk. |
| VIN (Pin 5) | Main power input | Supplies both regulators; must be decoupled with ≥10μF ceramic + 0.1μF high-frequency cap close to pin. |
| SW2 (Pin 6) | Channel 2 switch node | Independent switching node for second buck stage; layout symmetry recommended for thermal balance. |
| RUN2 (Pin 7) | Regulator 2 enable control | Functionally identical to RUN1; allows independent on/off control of Channel 2. |
| VFB2 (Pin 8) | Regulator 2 feedback input | Tied directly to VOUT2 in LTC3419EDD-1#TRPBF; no external resistors required for fixed 1.8V output. |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-output regulation | VOUT1 = 1.575V, VOUT2 = 1.8V - eliminates external feedback resistors and layout sensitivity, reducing BOM count and board area. |
| 100% duty cycle low-dropout mode | Enables VOUT operation within ~100mV of VIN - critical for maintaining system operation during Li-ion battery discharge down to 2.7V. |
| Internal compensation for ceramic capacitors | Removes need for external Type II/III compensation networks - simplifies design and improves stability margin with low-ESR output caps. |
| Independent soft-start per channel | ~750μs ramp time - prevents inrush current into output capacitors and avoids input rail collapse during power-up sequencing. |
| Burst Mode® operation | Efficiency >85% at 100μA load - extends battery life in idle or monitoring states without sacrificing transient response. |
Applications
| Mobile Baseband Power | Digital Camera Core Logic |
|---|---|
Use Scenario: Dual-rail supply for cellular baseband processor requiring 1.575V core and 1.8V I/O in LTE handsets. IC Role / Device Role / Timing Role: Primary dual-buck regulator providing tightly regulated, sequenced power with independent RUN control. Use Value: Eliminates need for discrete regulators or PMIC; achieves >92% efficiency at 300mA/channel with 3.6V input, minimizing thermal load in sealed enclosures. |
Use Scenario: Powering image signal processor (ISP) and memory interface in compact digital still cameras. IC Role / Device Role / Timing Role: Fixed-output dual converter delivering stable 1.575V and 1.8V rails synchronized to camera startup timing. Use Value: Internal soft-start prevents voltage overshoot during rapid power-on cycles; Burst Mode® maintains >80% efficiency during preview mode with intermittent processing bursts. |
| DSL Modem PHY Layer | Portable Media Player SoC |
Use Scenario: Supplying DSL line driver and analog front-end (AFE) circuitry requiring clean, low-noise 1.8V and 1.575V rails. IC Role / Device Role / Timing Role: Dual synchronous buck regulator with pulse-skipping mode selected for low output ripple (<20mVP-P) at full load. Use Value: 2.25MHz switching frequency moves noise spectrum away from DSL band (0–4MHz); ceramic capacitor compatibility ensures minimal conducted EMI. |
Use Scenario: Powering application processor and audio codec in flash-based media players with 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Fixed-output dual regulator supporting dynamic voltage scaling (DVS) via independent RUN pin control. Use Value: 35μA quiescent current extends playback time by >15% versus comparable solutions; 100% duty cycle sustains operation until battery reaches 2.7V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62150ARGTR | Single-channel 600mA buck; 2.5–6V input; adjustable only; no fixed 1.575V/1.8V option. | Requires two ICs to match dual-rail functionality; lacks independent RUN control per channel. | Choose only if redesign allows splitting rails across two separate converters and adding external feedback networks. |
| MP2143DJ-LF-Z | Dual-channel, but fixed 1.2V/3.3V outputs; 2.5–5.5V input; 1.5MHz switching; no Burst Mode®. | Output voltages incompatible with LTC3419EDD-1#TRPBF's 1.575V/1.8V requirement; higher ripple in light-load conditions. | Select only if system can tolerate 1.2V/3.3V rails and prioritizes cost over light-load efficiency and thermal footprint. |
Compared with TPS62150ARGTR and MP2143DJ-LF-Z, the LTC3419EDD-1#TRPBF uniquely integrates matched 1.575V/1.8V fixed outputs, dual independent enable pins, and Burst Mode®-enabling single-chip dual-rail power with best-in-class light-load efficiency and minimal PCB area.
Availability
LTC3419EDD-1#TRPBF is available at Aetrix Electronics and suitable for mobile communications, imaging systems, broadband modems, and portable media requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3419EDD-1#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 acquired Linear Technology in 2017 and maintains full product support, datasheet documentation, and application engineering resources for legacy Linear parts including the LTC3419 series.
The LTC3419 product line was designed specifically for space-constrained, battery-powered portable electronics requiring dual independent low-voltage rails with high efficiency across wide load ranges.
FAQ
What output voltages does the LTC3419EDD-1#TRPBF provide?
The LTC3419EDD-1#TRPBF provides factory-set fixed outputs: Channel 1 delivers 1.575V ±1.5% and Channel 2 delivers 1.8V ±1.5%. These values are trimmed using internal resistor dividers - no external feedback resistors are required, and VFB1/VFB2 pins must be connected directly to their respective output nodes in this variant.
Does the LTC3419EDD-1#TRPBF support independent enable control for each channel?
Yes, the LTC3419EDD-1#TRPBF supports fully independent enable control: RUN1 (Pin 2) controls Channel 1 and RUN2 (Pin 7) controls Channel 2. Driving either pin below 0.4V disables its associated regulator with sub-1μA shutdown current, enabling flexible power sequencing and dynamic rail gating in multi-core systems.
How does the MODE pin affect efficiency and ripple in the LTC3419EDD-1#TRPBF?
When MODE (Pin 3) is grounded, the LTC3419EDD-1#TRPBF enters Burst Mode®, achieving >85% efficiency at 100μA load but with higher output ripple (~20mVP-P). When MODE is tied to VIN, it operates in pulse-skipping mode - maintaining constant 2.25MHz frequency and lower ripple (<10mVP-P) at the expense of reduced light-load efficiency.
What thermal considerations apply to the LTC3419EDD-1#TRPBF in 100% duty cycle operation?
In dropout (100% duty cycle), the LTC3419EDD-1#TRPBF's P-channel RDS(ON) increases as VIN decreases - e.g., rising from 0.4Ω at 3.6V to >0.55Ω at 2.7V. Users must calculate worst-case power dissipation (IOUT² × RDS(ON)) and ensure θJA ≤ 40°C/W via exposed pad soldering and adequate copper area to avoid exceeding 125°C junction temperature.
Can ceramic capacitors be used with the LTC3419EDD-1#TRPBF, and are there layout cautions?
Yes - the LTC3419EDD-1#TRPBF is internally compensated for all-ceramic designs. Use X5R/X7R dielectrics for CIN and COUT. However, avoid long input traces between wall adapters and VIN: load transients can induce ringing that couples into SW nodes or exceeds absolute max ratings. Place ≥10μF ceramic + 0.1μF high-frequency cap within 3mm of VIN and GND pins.
LTC3419EDD-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.575V, 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC3419EDD-1#TRPBF FAQ
1.How can I place an order for LTC3419EDD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419EDD-1#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 LTC3419EDD-1#TRPBF reliable?
The price and inventory of LTC3419EDD-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3419EDD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3419EDD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419EDD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419EDD-1#TRPBF?
LTC3419EDD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419EDD-1#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 LTC3419EDD-1#TRPBF?
For technical support, including LTC3419EDD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419EDD-1#TRPBF requirements.
6.How does Aetrix verify that LTC3419EDD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3419EDD-1#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 LTC3419EDD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3419EDD-1#TRPBF?
All LTC3419EDD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419EDD-1#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 LTC3419EDD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3419EDD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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