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Analog Devices Inc. LTC3419EDD#TRPBF
- Part No.:
- LTC3419EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC3419EDD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,800
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Product details
Overview
LTC3419EDD#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 enables compact, high-efficiency power for dual-rail portable systems such as digital still cameras and wireless modems.
For engineers reviewing the LTC3419EDD#TRPBF datasheet, LTC3419EDD#TRPBF pinout, LTC3419EDD#TRPBF application, or LTC3419EDD#TRPBF equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-chain support for production deployment.
Technical Context
The LTC3419EDD#TRPBF employs current-mode control with shared 2.25MHz oscillator and in-phase switching across both channels. Each regulator features independent soft-start, internal compensation for ceramic output capacitors, and selectable Burst Mode® or pulse-skipping operation via the MODE pin.
It supports low-dropout operation via 100% duty cycle, uses P-channel/N-channel synchronous MOSFETs with typical RDS(ON) of 0.4Ω (top) and 0.4Ω (bottom) at 3.6V, and integrates overtemperature protection with thermal shutdown at 125°C junction temperature.
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 regulation. |
| Output Current per Channel | 600mA - sufficient to power core logic and I/O rails in portable media players and PDAs. |
| Switching Frequency | 2.25MHz (typ) - enables use of ≤4.7μH inductors and 10μF ceramic output capacitors for ultra-compact layouts. |
| Quiescent Current | 35μA (both channels active) - extends battery runtime in always-on subsystems like modem standby. |
| Feedback Reference Voltage | 0.6V (±1.7% over –40°C to 125°C) - allows precise setting of low output voltages (e.g., 1.2V, 1.8V) with standard resistor dividers. |
| Efficiency Peak | 96% at VOUT = 1.8V, IOUT = 600mA, VIN = 3.6V - minimizes thermal load in sealed handheld enclosures. |
| Shutdown Current | <1μA - meets stringent off-state leakage requirements for battery-backed real-time clocks or sensors. |
Pinout & Package
Package: 8-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 9), 0.75mm profile, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistor divider on VOUT1; regulates output by holding voltage at 0.6V reference. |
| RUN1 (Pin 2) | Channel 1 enable control | High (≥1.2V) enables regulator 1; low (≤0.4V) forces shutdown with <1μA quiescent draw. |
| MODE (Pin 3) | Operating mode select | Ground = Burst Mode® (high light-load efficiency); 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. |
| VIN (Pin 5) | Main power input | Supplies both regulators; must be decoupled with ≥10μF ceramic + 0.1μF high-frequency cap near pin. |
| SW2 (Pin 6) | Channel 2 switch node | Independent switch node for second buck stage; layout symmetry recommended for thermal balance. |
| RUN2 (Pin 7) | Channel 2 enable control | Functionally identical to RUN1; enables independent power sequencing of dual rails. |
| VFB2 (Pin 8) | Channel 2 feedback input | Regulates VOUT2 independently; supports different output voltages per channel (e.g., 1.2V + 2.5V). |
| Exposed Pad (Pin 9) | Thermal ground / GND | Must be soldered to PCB copper pour for thermal conduction; improves θJA from 40°C/W to ≤30°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous buck architecture | Eliminates external Schottky diodes; reduces board area and BOM count while improving efficiency by ~5% vs. asynchronous designs. |
| Internally compensated for ceramic capacitors | Removes need for external compensation network; simplifies design validation and shortens time-to-market for ceramic-based power stages. |
| Independent soft-start per channel | 750μs ramp time prevents inrush current into output caps; avoids input rail droop during power-up of multi-rail systems. |
| Short-circuit protected outputs | Forces N-MOSFET on longer per cycle during overload; limits peak current and prevents thermal runaway without external current-sense resistors. |
| 100% duty cycle low-dropout operation | Maintains regulation down to VIN – VOUT ≈ 150mV (at 600mA, 3.6V); extends usable battery life in Li-ion systems discharging to 2.8V. |
Applications
| Digital Still Camera Core & I/O Rails | Wireless DSL Modem Baseband + RF Supply |
|---|---|
Use Scenario: Dual-rail power for image sensor (1.2V), processor core (1.8V), and memory interface (2.5V) in compact camera modules. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing isolated, sequenced, and ripple-controlled DC supplies. Use Value: 96% peak efficiency and 35μA quiescent current directly extend battery life per shot; 2.25MHz switching avoids audible noise in lens actuator circuits. |
Use Scenario: Independent 1.8V baseband processor rail and 3.3V RF front-end supply in DSL/wireless CPE units. IC Role / Device Role / Timing Role: Dual-channel DC/DC converter enabling flexible voltage assignment and independent enable control for power domain isolation. Use Value: Burst Mode® operation reduces no-load power to <1μW per channel, critical for Energy Star compliance in always-connected modems. |
| Portable Media Player Audio + Display | PDA/Palmtop PC Application Processor + Memory |
Use Scenario: Low-noise 1.2V audio codec supply and 2.8V OLED display driver rail in battery-powered media players. IC Role / Device Role / Timing Role: High-frequency synchronous buck regulator minimizing EMI coupling into sensitive analog audio paths. Use Value: 2.25MHz operation shifts switching harmonics above 20MHz, easing EMI filter design and reducing conducted emissions into audio DACs. |
Use Scenario: Dual-core SoC requiring 1.1V CPU core and 1.8V DDR2 memory supply in space-constrained palmtop PCs. IC Role / Device Role / Timing Role: Monolithic dual buck IC supporting independent soft-start and dynamic voltage scaling for performance/power optimization. Use Value: Independent RUN1/RUN2 pins allow staggered power-up to limit inrush current on shared battery source, preventing brownout during boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62150ARGTR | Single-channel 1A buck; 2.25MHz, 2.5–6V input, 0.6V ref; no dual-output capability. | Requires two devices for dual-rail use; increases board area and component count. | Select only if higher per-channel current (>600mA) is needed and dual integration is not required. |
| RT8059GQW | Dual-channel 600mA buck; 2.7–5.5V input; 1.5MHz switching; 0.8V ref; no Burst Mode®. | Higher feedback voltage limits low-VOUT flexibility; fixed 1.5MHz limits inductor size reduction vs. 2.25MHz. | Consider when cost sensitivity outweighs need for sub-1V outputs or maximum layout compactness. |
Compared with LTC3419EDD#TRPBF, TPS62150ARGTR lacks integrated dual-channel functionality and increases system complexity, while RT8059GQW trades off lower minimum output voltage and higher switching frequency-both critical for modern low-power portable SoCs.
Availability
LTC3419EDD#TRPBF is available at Aetrix Electronics and suitable for digital still cameras, wireless DSL modems, and portable media players requiring stable component supply across extended temperature ranges (–40°C to 125°C).
Supply support for LTC3419EDD#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision, industrial, automotive, and communications markets.
The LTC3419EDD#TRPBF belongs to Linear's µPower synchronous buck regulator product line, designed specifically for space- and efficiency-constrained portable electronics where dual independent rails, ultra-low quiescent current, and minimal external components are mandatory.
FAQ
What is the maximum output current per channel for the LTC3419EDD#TRPBF?
The LTC3419EDD#TRPBF delivers up to 600mA per channel continuously under typical conditions (VIN = 3V, TA = 25°C). Derating applies at elevated ambient temperatures or with poor PCB thermal design; full 600mA is guaranteed over –40°C to 125°C junction temperature when using the exposed pad for thermal conduction. The LTC3419EDD#TRPBF datasheet specifies peak switch current limit at 900mA (typ) per channel.
Does the LTC3419EDD#TRPBF require external compensation components?
No, the LTC3419EDD#TRPBF is internally compensated for use with all-ceramic output capacitors - no external Type II or Type III compensation network is needed. This simplifies layout and eliminates tuning iterations. However, a small feedback capacitor (CF) may be added across the lower feedback resistor to improve high-frequency phase margin if transient response testing reveals overshoot, especially with very low-ESR ceramic caps. The LTC3419EDD#TRPBF reference design uses 22pF CF1/CF2.
How does Burst Mode® operation affect output voltage ripple on the LTC3419EDD#TRPBF?
In Burst Mode®, the LTC3419EDD#TRPBF reduces switching activity at light loads, resulting in higher peak-to-peak output ripple (typically 20mVP-P at VOUT = 1.5V, COUT = 10μF) compared to pulse-skipping mode. This trade-off enables >85% efficiency at 1mA load. Ripple remains within specification for most digital logic rails but is unsuitable for noise-sensitive analog circuits. The LTC3419EDD#TRPBF MODE pin must be grounded to activate this feature.
Can the LTC3419EDD#TRPBF operate with a 2.5V input supply?
Yes, the LTC3419EDD#TRPBF supports input voltages from 2.5V to 5.5V. At 2.5V input, it maintains regulation down to VOUT ≈ 2.35V (100% duty cycle), with RDS(ON) increasing slightly - verified in the "Switch On-Resistance vs Input Voltage" graph (Fig G08). Efficiency drops modestly (~5% at 600mA), but the LTC3419EDD#TRPBF remains fully functional and stable across the entire specified input range.
What is the purpose of the exposed pad on the LTC3419EDD#TRPBF DFN package?
The exposed pad (Pin 9) on the LTC3419EDD#TRPBF is electrically and thermally connected to GND. It must be soldered to a PCB copper pour to achieve the specified θJA of 40°C/W. Omitting this connection degrades thermal performance significantly - junction temperature can rise >30°C under 600mA load - risking thermal shutdown or long-term reliability loss. The LTC3419EDD#TRPBF datasheet explicitly states "MUST BE SOLDERED TO PCB" for optimal operation.
LTC3419EDD#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:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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#TRPBF FAQ
1.How can I place an order for LTC3419EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419EDD#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#TRPBF reliable?
The price and inventory of LTC3419EDD#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3419EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419EDD#TRPBF?
LTC3419EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419EDD#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#TRPBF?
For technical support, including LTC3419EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419EDD#TRPBF requirements.
6.How does Aetrix verify that LTC3419EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3419EDD#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3419EDD#TRPBF?
All LTC3419EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419EDD#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3419EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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