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Analog Devices Inc. LTC3419IMS#TRPBF
- Part No.:
- LTC3419IMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3419IMS#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
LTC3419IMS#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, 2.25MHz synchronous step-down DC/DC regulator in a 10-lead MSOP package, delivering up to 600mA per channel with 0.6V feedback reference and 2.5V–5.5V input range. It supports low-dropout operation via 100% duty cycle and enables compact Li-ion–powered portable electronics requiring dual regulated rails.
For engineers reviewing the LTC3419IMS#TRPBF datasheet, LTC3419IMS#TRPBF pinout, LTC3419IMS#TRPBF application, or LTC3419IMS#TRPBF equivalent, key selection criteria include its dual-channel current-mode architecture, user-selectable Burst Mode® vs pulse-skipping operation, internal compensation for ceramic output capacitors, and thermal performance in the MSOP-10 package with exposed pad grounding.
Technical Context
The LTC3419IMS#TRPBF employs a constant-frequency current-mode control architecture with synchronized in-phase switching across both channels at 2.25MHz (±250kHz). Each channel uses independent error amplifiers regulating VFB1/VFB2 to 0.6V, with peak inductor current controlled by ITH voltage and anti-shoot-through logic protecting the P/N-channel MOSFET pair.
Light-load behavior is determined by the MODE pin: grounded for Burst Mode® (fixed ~60mA peak inductor current, intermittent cycling), or tied to VIN for pulse-skipping mode (variable peak current, constant-frequency down to very low loads). Dropout operation is supported via 100% duty cycle, with RDS(ON) of top/bottom switches specified at 0.4Ω (typ) under 3.6V input.
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, memory, and RF sections in portable devices without external current boosting. |
| Switching Frequency | 2.25MHz (typ) - enables use of sub-3.3μH inductors and 10μF ceramic output capacitors, minimizing board area. |
| Quiescent Current | 35μA (both channels active) - extends battery runtime in always-on subsystems such as real-time clocks or sensor interfaces. |
| Feedback Reference Voltage | 0.6V (±10mV over –40°C to 125°C) - allows precise regulation of output voltages as low as 0.6V using standard resistor dividers. |
| Shutdown Current | <1μA - ensures negligible battery drain during system sleep or powered-off states. |
| Package | 10-Lead MSOP with exposed pad - provides 120°C/W θJA, requiring PCB thermal pad connection for reliable 600mA/channel operation at full ambient temperature range. |
Pinout & Package
The LTC3419IMS#TRPBF is housed in a 10-lead plastic MSOP package (3mm × 3mm footprint, 0.85mm height) with an exposed thermal pad (Pin 5) that must be soldered to PCB ground for thermal integrity. Pin 5 (GND) and the exposed pad are electrically connected and serve as primary thermal and electrical return paths.
| 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 ±10mV - sets precision of adjustable rail. |
| RUN1 (Pin 2) | Channel 1 enable control | High = enable (pull to VIN); low = shutdown (pull to GND); supports independent sequencing of dual outputs. |
| MODE (Pin 3) | Operating mode select | Ground = Burst Mode® (high efficiency at light load); 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 switching losses. |
| GND (Pin 5) | Power and signal ground | Primary return path for input/output capacitors and IC substrate; exposed pad (Pin 5) must be soldered to PCB ground plane. |
| SW2 (Pin 6) | Channel 2 switch node | Independent high-side/low-side switching node for second buck stage - enables fully decoupled dual-rail design. |
| RUN2 (Pin 7) | Channel 2 enable control | Independent enable/disable control identical to RUN1 - allows staggered startup or fault-isolated shutdown. |
| VFB2 (Pin 8) | Channel 2 feedback input | Identical function to VFB1; enables independent regulation of second output voltage with same 0.6V reference. |
| VIN (Pin 9) | Main power input | Supplies both channels; requires local 10μF ceramic + 0.1μF HF bypass capacitor within 3mm of pin to suppress switching noise. |
| GND (Pin 10) | Secondary ground terminal | Provides additional low-impedance return path; must connect to same ground plane as Pin 5 and exposed pad. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated for all-ceramic output capacitors | Eliminates need for ESR-based compensation networks - simplifies layout and improves reliability versus tantalum or polymer alternatives. |
| Independent soft-start per channel | ~750μs ramp time from 0V to full output - prevents inrush current into output capacitors and avoids input voltage droop during startup. |
| Short-circuit protection with frequency foldback | Forces N-channel switch on longer per cycle during output short - limits peak inductor current and prevents thermal runaway without external circuitry. |
| 100% duty cycle low-dropout operation | Maintains regulation when VIN approaches VOUT - extends usable battery life down to ~2.7V for 1.8V/2.5V rails in Li-ion systems. |
| User-selectable light-load modes | Burst Mode® achieves >85% efficiency at 1mA load; pulse-skipping maintains <20mVP-P ripple at same load - selectable per application priority. |
Applications
| Mobile Baseband Processor Power | Digital Camera Core Logic Supply |
|---|---|
Use Scenario: Dual-rail power for application processor (1.2V core) and I/O interface (1.8V) in cellular handsets. IC Role / Device Role / Timing Role: Primary dual-buck regulator supplying CPU core and memory I/O domains with independent enable control and sequencing. Use Value: 600mA/channel capability and 2.25MHz switching enable compact 2-layer PCB layout; Burst Mode® extends talk time by reducing quiescent loss during idle periods. |
Use Scenario: Powering image signal processor (ISP), CMOS sensor interface, and flash controller in digital still cameras. IC Role / Device Role / Timing Role: Dual-output DC/DC converter generating 1.8V ISP core and 2.5V sensor analog rail with independent RUN control for power gating. Use Value: 0.6V reference enables precise 1.8V/2.5V outputs; internal compensation eliminates ESR dependency - improves stability with small ceramic caps in space-constrained camera modules. |
| Wireless Modem RF Front-End Bias | Portable Media Player Audio Codec Supply |
Use Scenario: Providing clean, low-noise 1.5V and 2.8V rails for LTE/Wi-Fi transceiver PA bias and LNA stages. IC Role / Device Role / Timing Role: Dual synchronous buck regulator delivering tightly regulated, low-ripple supplies with fast transient response to RF load steps. Use Value: Pulse-skipping mode option ensures <20mVP-P ripple at 100mA load; current-mode control delivers <10μs recovery from 50% load transients - critical for RF spectral purity. |
Use Scenario: Powering stereo audio codec, DAC, and headphone amplifier in MP3 players with battery-life optimization. IC Role / Device Role / Timing Role: Dual-channel regulator supplying 1.2V digital core and 3.3V analog section with independent shutdown for audio subsystem power management. Use Value: 35μA quiescent current and <1μA shutdown draw extend playback time; 100% duty cycle sustains 3.3V output down to 3.4V battery voltage - maximizing usable cell capacity. |
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; 2.5–6V input; fixed 1.2V/adjustable output; no dual-output or MODE-selectable light-load modes. | Requires two ICs for dual-rail designs; lacks independent RUN control and Burst Mode® - less suitable for space-constrained dual-rail portable systems. | Select only if single-rail requirement exists and higher 1A current is needed; not a functional substitute for LTC3419IMS#TRPBF's dual-channel integration. |
| MAX17504ATP+ | Dual-channel 600mA buck; 4.5–20V input; 1.2MHz switching; requires external compensation; no integrated soft-start or Burst Mode®. | Higher minimum input voltage excludes Li-ion direct operation; external compensation increases BOM count and layout sensitivity - less optimized for portable battery systems. | Consider for industrial 12V-input dual-rail applications where higher VIN tolerance is required; not drop-in for 2.5–5.5V battery-powered designs. |
Compared with TPS62150ARGTR and MAX17504ATP+, the LTC3419IMS#TRPBF uniquely integrates dual 600mA synchronous bucks with 2.25MHz operation, 0.6V reference, and selectable light-load modes in a thermally enhanced MSOP-10 - making it optimal for compact, battery-efficient dual-rail portable electronics where input voltage starts at 2.5V.
Availability
LTC3419IMS#TRPBF is available at Aetrix Electronics and suitable for mobile baseband processor power, digital camera core logic supply, and wireless modem RF front-end bias requiring stable component supply across production lifecycles.
Supply support for LTC3419IMS#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. (acquired Linear Technology in 2017) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and power management ICs for precision, power, and connectivity applications.
The LTC3419IMS#TRPBF belongs to Linear's µPower synchronous buck regulator product line, designed specifically for space- and efficiency-critical portable electronics requiring dual regulated rails from single-cell Li-ion or USB sources.
FAQ
What is the maximum continuous output current per channel for the LTC3419IMS#TRPBF?
The LTC3419IMS#TRPBF delivers up to 600mA continuous output current per channel under typical conditions (VIN = 3V, TA = 25°C, with proper PCB thermal design). This rating assumes use of the recommended 3.3μH inductor and 10μF ceramic output capacitors, and requires soldering the exposed pad (Pin 5) to a thermal plane to maintain junction temperature ≤125°C.
Does the LTC3419IMS#TRPBF support adjustable output voltages, and what is the feedback reference voltage?
Yes, the LTC3419IMS#TRPBF supports fully adjustable output voltages via external resistor dividers on VFB1 and VFB2 pins. Its internal reference voltage is precisely 0.6V (±10mV over –40°C to 125°C), enabling accurate regulation of outputs from 0.6V upward - for example, 1.2V (R1/R2 = 1:1) or 1.8V (R1/R2 = 2:1).
How does the MODE pin affect light-load efficiency and output ripple in the LTC3419IMS#TRPBF?
The MODE pin selects between two light-load operating modes: grounding it enables Burst Mode®, which maximizes efficiency (>85% at 1mA) but increases output ripple (~20mVP-P); tying it to VIN enables pulse-skipping mode, maintaining constant 2.25MHz switching and low ripple (<20mVP-P) at the cost of reduced light-load efficiency. The LTC3419IMS#TRPBF automatically transitions between modes based on load demand.
What thermal considerations apply to the LTC3419IMS#TRPBF in the MSOP-10 package?
The LTC3419IMS#TRPBF in MSOP-10 has θJA = 120°C/W. To sustain 600mA per channel at full ambient temperature (–40°C to 125°C), the exposed pad (Pin 5) must be soldered to a minimum 100mm² copper thermal pad connected to inner ground planes. Without this, junction temperature may exceed 125°C under full load, triggering thermal shutdown and degrading long-term reliability.
Can the LTC3419IMS#TRPBF operate with ceramic input and output capacitors exclusively?
Yes, the LTC3419IMS#TRPBF is internally compensated for all-ceramic capacitor designs. It does not require ESR-based stabilization, allowing use of X5R/X7R 10μF ceramics on both input and output. However, a 0.1μF ceramic must be placed adjacent to VIN to suppress high-frequency ringing - especially when long input traces exist between wall adapter and IC.
LTC3419IMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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:
- 10-MSOP
LTC3419IMS#TRPBF FAQ
1.How can I place an order for LTC3419IMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419IMS#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 LTC3419IMS#TRPBF reliable?
The price and inventory of LTC3419IMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3419IMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3419IMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419IMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419IMS#TRPBF?
LTC3419IMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419IMS#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 LTC3419IMS#TRPBF?
For technical support, including LTC3419IMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419IMS#TRPBF requirements.
6.How does Aetrix verify that LTC3419IMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3419IMS#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 LTC3419IMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3419IMS#TRPBF?
All LTC3419IMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419IMS#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 LTC3419IMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC3419IMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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