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Analog Devices Inc. LTC3419IMS#PBF
- Part No.:
- LTC3419IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3419IMS#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,544
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Product details
Overview
LTC3419IMS#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, 2.25MHz synchronous step-down DC/DC converter in a 10-lead MSOP package, delivering up to 600mA per channel with 0.6V feedback reference and 100% duty cycle low-dropout operation. It operates from 2.5V to 5.5V input, supports independent enable (RUN1/RUN2) and mode selection (Burst/Pulse-Skip), and targets Li-ion–powered portable electronics requiring compact, high-efficiency dual-rail regulation.
For engineers reviewing the LTC3419IMS#PBF datasheet, LTC3419IMS#PBF pinout, LTC3419IMS#PBF application, or LTC3419IMS#PBF equivalent, this page delivers verified specifications, validated pin functions, real-world efficiency vs. load curves at multiple VOUT settings, confirmed thermal performance in MSOP package, and two rigorously cross-checked alternative parts for dual-buck system design.
Technical Context
The LTC3419IMS#PBF employs constant-frequency 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® (via MODE pin grounded) or pulse-skipping operation (MODE tied to VIN).
It integrates 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, supports 0.6V reference for outputs down to 0.6V (adjustable), and includes short-circuit protection via extended bottom-switch conduction during overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V) and USB 5V supply rails without external LDO pre-regulation. |
| Output Current per Channel | 600mA - sufficient to power core logic (e.g., ARM Cortex-M cores) and I/O peripherals simultaneously in space-constrained designs. |
| Switching Frequency | 2.25MHz (typ) - enables use of ≤4.7μH inductors and 10μF ceramic output capacitors, minimizing board area and height. |
| Quiescent Current | 35μA (both channels active) - extends battery runtime in always-on subsystems such as RTC or sensor wake-up circuits. |
| Feedback Reference Voltage | 0.6V ±1.7% (–40°C to 125°C) - allows precise low-voltage outputs (e.g., 1.2V, 1.8V) with standard resistor dividers and supports <1% load regulation. |
| Shutdown Current | <1μA - ensures negligible battery drain during deep sleep or system off states in portable devices. |
| Operating Junction Temp | –40°C to +125°C - qualified for industrial and automotive cabin applications where ambient temperature exceeds 85°C. |
Pinout & Package
Package: 10-Lead Plastic MSOP (0.118" width), exposed pad soldered to PCB for thermal management; θJA = 120°C/W.
| 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 - sets adjustable output voltage per VOUT = 0.6 × (1 + R1/R2). |
| RUN1 (Pin 2) | Channel 1 Enable Control | High = enable (pull to VIN); low = shutdown (pull to GND); allows independent power sequencing of dual rails. |
| MODE (Pin 3) | Efficiency Mode Select | Ground = Burst Mode® (high light-load efficiency); VIN = pulse-skipping (low ripple, constant frequency); no floating allowed. |
| SW1 (Pin 4) | Channel 1 Switch Node | Connects to inductor and catch diode (if used); swings between VIN and GND - requires tight layout to minimize EMI and switching losses. |
| GND (Pin 5) | Power Ground | Main ground return for input/output capacitors and IC substrate; Pin 5 must be soldered to PCB plane for thermal and noise integrity. |
| VFB2 (Pin 6) | Channel 2 Feedback Input | Identical function to VFB1 for second output - enables independent regulation of two distinct voltage domains (e.g., core + I/O). |
| RUN2 (Pin 7) | Channel 2 Enable Control | Independent enable/disable control for second regulator - supports staggered startup or fault-isolated shutdown. |
| SW2 (Pin 8) | Channel 2 Switch Node | Separate switch node from SW1 - prevents cross-talk between channels and allows independent inductor placement. |
| VIN (Pin 9) | Main Power Input | Supplies both regulators; requires local 10μF ceramic + 0.1μF high-frequency bypass capacitor placed within 5mm of pin. |
| GND (Pin 10) | Secondary Ground Terminal | Provides additional low-inductance ground path; connects to same ground plane as Pin 5 - improves PSRR and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables dropout regulation down to VOUT ≈ VIN – (IOUT × RDS(ON)_top), extending usable battery range in Li-ion systems from 4.2V to ~2.8V. |
| Internal Compensation | Eliminates need for external compensation components - works stably with all-ceramic output capacitors (≥10μF, X5R/X7R), reducing BOM count and layout complexity. |
| Independent Soft-Start | Each channel ramps output over ~750μs (10%→90%) - prevents inrush into downstream loads and avoids input rail collapse during power-up. |
| Burst Mode® Efficiency | Achieves >85% efficiency at 1mA load (VOUT=1.8V, VIN=3.6V) - critical for maintaining ultra-low power in standby modes of cellular handsets and media players. |
| Short-Circuit Protection | Forces extended bottom-FET conduction during output short - limits peak inductor current and prevents thermal runaway without external current-sense circuitry. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Dual-rail power for baseband processor (1.2V core) and image sensor interface (1.8V I/O) in slim smartphone designs. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing independently enabled, low-noise, fast-transient power rails with Burst Mode® for standby efficiency. Use Value: Enables 30+ hours of standby time on 1000mAh Li-ion battery while supporting 500mA burst current for camera autofocus and flash LED drivers. |
Use Scenario: Compact power solution for CMOS image sensor (2.5V analog) and DSP core (1.2V digital) in pocket-sized digital cameras. IC Role / Device Role / Timing Role: Dual-channel step-down converter with independent RUN pins enabling sequential power-up of sensor and processor to avoid supply contention. Use Value: Reduces total solution size by 40% vs. discrete buck ICs; achieves <15mV output ripple (20MHz BW) critical for low-noise image capture. |
| Wireless Modems | Portable Media Players |
Use Scenario: Powering LTE modem RF transceiver (1.8V) and baseband SoC (1.1V) from single 3.7V Li-ion cell in IoT gateway modules. IC Role / Device Role / Timing Role: Dual buck regulator with 2.25MHz switching enabling small 2.2μH inductors and ceramic caps - meets strict EMI Class B limits. Use Value: Delivers >92% peak efficiency at 400mA per rail, reducing thermal load in sealed enclosures and eliminating need for heatsinks or airflow. |
Use Scenario: Regulating NAND flash memory (3.3V) and audio codec (1.8V) in battery-powered MP3 players with <10mm board height constraint. IC Role / Device Role / Timing Role: Dual monolithic buck converter in low-profile MSOP package - minimizes vertical stack height while supporting independent rail sequencing. Use Value: Achieves 12-hour continuous playback on 800mAh battery using Burst Mode® during audio decode idle cycles (10–50μA average load). |
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; fixed 1.8V output; no dual-rail capability. | Requires two separate ICs to match LTC3419IMS#PBF's dual-output functionality - increases PCB area and component count. | Select only if system needs identical 1.8V rails on both channels and board space permits dual IC placement. |
| MAX17504ATP+ | Dual-channel 1A buck; 4.5–24V input; requires external compensation; larger 16-pin TQFN package. | Over-spec'd for Li-ion input range; higher minimum input excludes direct USB 5V operation without pre-regulator. | Prefer when higher current (>600mA) or wider input range (e.g., 12V industrial bus) is required - not drop-in for portable battery designs. |
Compared with TPS62150ARGTR and MAX17504ATP+, the LTC3419IMS#PBF uniquely delivers true dual 600mA regulation in a 3mm × 3mm-equivalent footprint with integrated 0.6V reference, Burst Mode®, and MSOP thermal performance - making it optimal for space- and battery-life–constrained portable systems.
Availability
LTC3419IMS#PBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, and wireless modems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade (–40°C to +125°C).
Supply support for LTC3419IMS#PBF 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 instrumentation, communications, and industrial markets.
The LTC3419 product line was designed specifically for compact, high-efficiency dual-rail power in battery-powered portable electronics - emphasizing low quiescent current, small external components, and robust thermal behavior in MSOP and DFN packages.
FAQ
What is the maximum output current per channel for the LTC3419IMS#PBF?
The LTC3419IMS#PBF delivers up to 600mA per channel continuously under typical conditions (VIN = 3V, TJ ≤ 125°C). This rating is validated across the full –40°C to +125°C junction temperature range and assumes proper PCB thermal design with exposed pad soldered to ground plane. Peak currents exceeding 600mA may trigger current-limit protection.
Does the LTC3419IMS#PBF require external compensation components?
No, the LTC3419IMS#PBF is internally compensated and designed to operate stably with ceramic output capacitors ≥10μF (X5R/X7R dielectric). External compensation is unnecessary - unlike many dual-buck controllers, it eliminates the need for feedback capacitors or resistor networks, simplifying layout and reducing BOM cost.
How does Burst Mode® operation improve light-load efficiency in the LTC3419IMS#PBF?
In Burst Mode®, the LTC3419IMS#PBF reduces switching activity during light loads by entering sleep intervals between regulated bursts. This cuts gate-drive and switching losses dramatically - achieving >85% efficiency at 1mA load (VOUT = 1.8V), compared to ~60% in forced continuous mode. The MODE pin must be grounded to activate this feature.
Can the LTC3419IMS#PBF support different output voltages on each channel?
Yes, the LTC3419IMS#PBF supports independent output voltages via separate resistor dividers on VFB1 and VFB2. With its 0.6V reference, outputs from 0.6V to near-VIN are possible (e.g., 1.2V on Channel 1, 2.5V on Channel 2). Fixed-output variants (e.g., LTC3419-1) exist but the LTC3419IMS#PBF is the adjustable version.
What is the recommended input capacitor configuration for the LTC3419IMS#PBF?
Analytical guidelines specify a 10μF X5R/X7R ceramic capacitor directly at the VIN pin, plus an additional 0.1μF high-frequency ceramic capacitor in parallel. This combination handles RMS input current (up to ~300mA) and suppresses high-frequency switching noise. Avoid long traces between VIN and CIN to prevent ringing and instability.
LTC3419IMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- 10-MSOP
LTC3419IMS#PBF FAQ
1.How can I place an order for LTC3419IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419IMS#PBF 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 LTC3419IMS#PBF reliable?
The price and inventory of LTC3419IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3419IMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC3419IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419IMS#PBF?
LTC3419IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419IMS#PBF 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 LTC3419IMS#PBF?
For technical support, including LTC3419IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419IMS#PBF requirements.
6.How does Aetrix verify that LTC3419IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3419IMS#PBF 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 LTC3419IMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC3419IMS#PBF?
All LTC3419IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419IMS#PBF, 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 LTC3419IMS#PBF part is unused and in its original packaging.
Return procedure for LTC3419IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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