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Analog Devices Inc. LTC3419EMS#TRPBF
- Part No.:
- LTC3419EMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3419EMS#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,580
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Product details
Overview
LTC3419EMS#TRPBF 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 supports input voltages from 2.5V to 5.5V and achieves up to 96% efficiency at 600mA, targeting Li-ion–powered portable electronics requiring compact, high-efficiency dual-rail regulation.
For engineers reviewing the LTC3419EMS#TRPBF datasheet, LTC3419EMS#TRPBF pinout, LTC3419EMS#TRPBF application, or LTC3419EMS#TRPBF equivalent, key selection criteria include its dual independent enable (RUN1/RUN2), user-selectable Burst Mode® vs pulse-skipping operation, internal compensation for ceramic output capacitors, and guaranteed –40°C to 125°C operation in the MSOP package.
Technical Context
The LTC3419EMS#TRPBF employs a constant-frequency current-mode control architecture with synchronized in-phase switching across both channels at 2.25MHz (±250kHz). Each regulator features independent soft-start, internal 0.6V reference, and separate RUN inputs enabling staggered or independent power sequencing.
It integrates P-channel and N-channel MOSFETs with typical RDS(ON) of 0.4Ω (top) and 0.4Ω (bottom) at VIN = 3.6V, supports 100% duty cycle for ultra-low dropout, 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 supplies without external LDO pre-regulation. |
| Output Current per Channel | 600mA - sufficient to power core logic, memory, and I/O rails in portable systems without thermal derating in MSOP package. |
| Switching Frequency | 2.25MHz (typ) - enables use of ≤4.7μH inductors and small ceramic capacitors, reducing board area and EMI filter complexity. |
| 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 temp) - allows precise regulation down to 0.6V output with standard resistor dividers; supports 1.2V, 1.5V, 1.8V, 2.5V, and other common logic rails. |
| Shutdown Current | <1μA - ensures negligible battery drain during system sleep or off-state, critical for long-term portable device standby. |
| Operating Temperature Range | –40°C to +125°C - qualified for industrial and automotive under-hood auxiliary rail 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. Pin pitch: 0.5mm. Height: 1.1mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistor divider from VOUT1; regulates output by holding voltage at 0.6V; high-impedance (±30nA bias) minimizes divider current loss. |
| RUN1 (Pin 2) | Channel 1 enable control | Logic-high (≥1.2V) enables Regulator 1; logic-low (≤0.4V) forces shutdown with <1μA quiescent draw; supports independent power sequencing. |
| MODE (Pin 3) | Operating mode select | Ground = Burst Mode® (high light-load efficiency); tie to VIN = pulse-skipping mode (low output 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 ground reference | Main return path for input/output capacitors and inductor; must be connected to exposed pad for thermal performance and noise control. |
| VFB2 (Pin 10) | Channel 2 feedback input | Identical function to VFB1; enables independent regulation of second output rail with separate resistor divider. |
| RUN2 (Pin 9) | Channel 2 enable control | Independent enable/disable control for Regulator 2; allows dynamic rail activation (e.g., camera module only when needed). |
| SW2 (Pin 8) | Channel 2 switch node | Separate switch node for second inductor; enables dual-output design without cross-coupling or shared inductor limitations. |
| VIN (Pin 7) | Main input supply | Accepts 2.5–5.5V; requires local 10μF ceramic + 0.1μF HF decoupling; shared input for both regulators reduces component count. |
| Exposed Pad (Pin NA) | Thermal & electrical ground | Must be soldered to large PCB copper area; provides primary thermal path and reduces junction-to-board θJA to 120°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent synchronous buck regulators | Two fully integrated 600mA channels in one MSOP package eliminate discrete controller + FET solutions, saving >40% board area versus dual single-channel ICs. |
| Internal compensation for all-ceramic output capacitors | Removes need for ESR-based stabilization; enables use of low-ESR, high-capacitance X5R/X7R ceramics (e.g., 10μF × 2) for <10mV output ripple without stability risk. |
| User-selectable Burst Mode® or pulse-skipping operation | Enables optimization for either battery life (Burst Mode®: 35μA IQ, >85% efficiency at 1mA) or low-noise timing rails (pulse-skipping: fixed 2.25MHz, <20mVP-P ripple). |
| 100% duty cycle low-dropout operation | Maintains regulation down to VIN – VOUT ≈ 150mV (at 600mA, VOUT=1.8V), extending usable battery range in Li-ion systems from 4.2V down to ~2.0V. |
| Independent soft-start per channel | 750μs monotonic ramp (VFB from 10% to 90%) prevents inrush into downstream loads; eliminates need for external soft-start circuitry or sequencing controllers. |
Applications
| Mobile Baseband Processor Power | Digital Camera Core & Sensor Rails |
|---|---|
Use Scenario: Powering ARM Cortex-A series application processors with split-core (VDD_CORE) and I/O (VDD_IO) rails in smartphones. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing independent 1.2V/600mA and 1.8V/600mA outputs with fast transient response to CPU load changes. Use Value: 96% peak efficiency and 35μA quiescent current extend talk time; independent RUN pins allow dynamic core rail shutdown during idle cycles. | Use Scenario: Supplying image signal processor (ISP), CMOS sensor analog/digital domains, and flash LED driver in compact digital still cameras. IC Role / Device Role / Timing Role: Generating clean, low-noise 2.5V analog sensor bias and 1.8V digital logic rails with minimal board space. Use Value: Internal compensation enables stable 10μF ceramic output caps; 2.25MHz switching avoids audible noise and simplifies EMI filtering near sensitive analog circuits. |
| Wireless Modem RF & Baseband | Portable Media Player Audio & Codec |
Use Scenario: Powering LTE/Wi-Fi modem chipsets requiring isolated, low-ripple 1.5V RF and 1.2V baseband supplies in thin-profile modems. IC Role / Device Role / Timing Role: Dual-channel regulator with independent MODE pin control: pulse-skipping on RF rail for spectral purity, Burst Mode® on baseband for standby efficiency. Use Value: 20mVP-P ripple in pulse-skipping mode meets RF supply noise specs; <1μA shutdown current preserves battery during cellular idle states. | Use Scenario: Delivering regulated 3.3V audio amplifier supply and 1.2V DSP core voltage in MP3 players with 8–16 hour battery life targets. IC Role / Device Role / Timing Role: High-efficiency dual buck supplying bursty audio decode workloads and continuous low-power playback modes. Use Value: 92% efficiency at 100mA (typical playback load) and 87% at 1mA (standby) maximize runtime; 100% duty cycle sustains output until battery reaches 2.5V. |
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 1A buck; no dual-output capability; 3MHz switching; 0.6V ref; 17μA IQ. | Requires two devices for dual-rail designs; higher frequency enables smaller passives but increases gate drive loss at high VIN. | Select when needing >600mA per rail or tighter size constraints than MSOP allows; not drop-in for dual-rail layouts. |
| LTC3636EMSE#PBF | Dual 600mA buck; 3mm × 4mm 16-lead MSE package; 3MHz; 0.6V ref; 28μA IQ; integrated soft-start. | Larger footprint than MSOP; higher switching frequency; no MODE pin - fixed pulse-skipping only. | Choose for higher-frequency designs where 3MHz improves transient response or allows smaller inductors; not pin-compatible with LTC3419EMS#TRPBF. |
Compared with TPS62150ARGTR and LTC3636EMSE#PBF, the LTC3419EMS#TRPBF uniquely combines dual 600mA regulation, user-selectable light-load modes, and MSOP packaging - enabling compact, battery-optimized dual-rail power in space-constrained portable systems without redesigning PCB layout for single-channel alternatives.
Availability
LTC3419EMS#TRPBF is available at Aetrix Electronics and suitable for mobile baseband power, digital camera rails, wireless modem supplies, and portable media player power systems requiring stable component supply, full industrial temperature support, and long-lifecycle availability.
Supply support for LTC3419EMS#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. (ADI) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC3419EMS#TRPBF belongs to ADI's Power by Linear™ portfolio of high-efficiency DC/DC converters, designed specifically for space- and battery-constrained portable electronics requiring dual independent regulated outputs with minimal external components.
FAQ
What is the maximum output current per channel for the LTC3419EMS#TRPBF?
The LTC3419EMS#TRPBF delivers up to 600mA per channel continuously across the full –40°C to +125°C operating temperature range when used with appropriate PCB copper area and thermal vias. This rating is validated with 10μF ceramic output capacitors and 3.3μH inductors, and assumes VIN ≥ 3V. At VIN = 2.5V and VOUT = 1.2V, output current is limited by thermal rise and duty cycle constraints.
Does the LTC3419EMS#TRPBF require external compensation components?
No, the LTC3419EMS#TRPBF is internally compensated and designed to operate stably with all-ceramic output capacitors (e.g., 10μF X5R) without external compensation networks. The control loop is optimized for ceramic ESR ≈ 5mΩ or less. Adding external feedback capacitors (CF1/CF2) is optional and only recommended to improve high-frequency transient response in demanding applications.
How does the MODE pin affect the operation of the LTC3419EMS#TRPBF?
The MODE pin on the LTC3419EMS#TRPBF selects between two light-load operating modes: grounding the pin enables Burst Mode® operation (maximizing efficiency at loads <10mA, with ~35μA quiescent current), while tying it to VIN enables pulse-skipping mode (maintaining 2.25MHz switching down to ~1mA, with lower output ripple but higher light-load IQ). The pin must not be left floating.
Can the LTC3419EMS#TRPBF support different output voltages on each channel?
Yes, the LTC3419EMS#TRPBF supports independent output voltages on Channel 1 and Channel 2 via separate resistor dividers connected to VFB1 and VFB2. Each channel regulates its respective VFB pin to 0.6V, so VOUT1 = 0.6V × (1 + R1/R2) and VOUT2 = 0.6V × (1 + R3/R4). Fixed-output variants (e.g., LTC3419-1) are also available but the LTC3419EMS#TRPBF is the adjustable version.
What is the thermal resistance (θJA) of the LTC3419EMS#TRPBF in its MSOP package?
The LTC3419EMS#TRPBF in the 10-lead MSOP package has a junction-to-ambient thermal resistance (θJA) of 120°C/W under standard JEDEC 2-layer board conditions (2 oz Cu, 2 in² exposed pad). With proper PCB layout - including soldering the exposed pad to ≥2 in² internal/external copper planes using ≥4 thermal vias - practical θJA can be reduced to ~65°C/W, enabling full 600mA per channel at +85°C ambient.
LTC3419EMS#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
LTC3419EMS#TRPBF FAQ
1.How can I place an order for LTC3419EMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419EMS#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 LTC3419EMS#TRPBF reliable?
The price and inventory of LTC3419EMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3419EMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3419EMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419EMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419EMS#TRPBF?
LTC3419EMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419EMS#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 LTC3419EMS#TRPBF?
For technical support, including LTC3419EMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419EMS#TRPBF requirements.
6.How does Aetrix verify that LTC3419EMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3419EMS#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 LTC3419EMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3419EMS#TRPBF?
All LTC3419EMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419EMS#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 LTC3419EMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC3419EMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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