My Inquiry
My Account
Analog Devices Inc. LTC3419EMS#PBF
- Part No.:
- LTC3419EMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3419EMS#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:728
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3419EMS#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, monolithic, synchronous step-down DC/DC converter optimized for portable Li-ion and USB-powered systems. It delivers up to 600mA per channel across an input range of 2.5V–5.5V, features 2.25MHz fixed-frequency operation, 0.6V feedback reference, and 100% duty cycle low-dropout capability - enabling extended battery runtime in space-constrained applications such as digital still cameras and wireless modems.
For engineers reviewing the LTC3419EMS#PBF datasheet, LTC3419EMS#PBF pinout, LTC3419EMS#PBF application, or LTC3419EMS#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed dual-buck topology behavior, real-world efficiency vs. load curves at VOUT = 1.2V/1.8V/2.5V, and precise MSOP-10 package implementation details - all specific to the LTC3419EMS#PBF variant.
Technical Context
The LTC3419EMS#PBF implements a constant-frequency, current-mode control architecture with synchronized dual channels sharing a single 2.25MHz oscillator. Each channel uses internal 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, supporting independent soft-start and user-selectable Burst Mode® or pulse-skipping operation via the MODE pin.
It operates with a 0.6V internal reference voltage, enabling output regulation down to 0.6V using external resistor dividers. The device supports 100% duty cycle dropout operation and integrates overcurrent protection, thermal shutdown, and short-circuit recovery without external components - all within its 10-lead MSOP package with exposed pad for thermal management.
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 rails. |
| Output Current per Channel | 600mA - sufficient to power core logic, memory, and RF sections in portable devices. |
| Switching Frequency | 2.25MHz (typ) - enables use of sub-3.3μH inductors and compact 10μF ceramic output capacitors. |
| Feedback Reference Voltage | 0.6V (±1.7% over –40°C to 125°C) - allows precise low-voltage outputs (e.g., 1.2V, 1.8V) with standard resistor ratios. |
| Quiescent Current | 35μA (both channels active) - minimizes standby power loss in always-on subsystems. |
| Shutdown Current | <1μA - preserves battery charge during deep sleep or system off states. |
| Efficiency Peak | 96% at VOUT = 1.8V, IOUT = 600mA, VIN = 3.6V - reduces thermal load and extends runtime. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.85mm max height), with exposed pad (Pin 5) soldered to PCB ground for thermal conduction. Pin count and layout match MSOP-10 mechanical standard; not pin-compatible with DFN-8 variants.
| 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. |
| RUN1 (Pin 2) | Channel 1 Enable Control | High (≥1V) enables Regulator 1; low (≤0.4V) forces shutdown with <1μA IQ. |
| 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. |
| GND (Pin 5) | Power Ground / Exposed Pad | Main return path for both channels; exposed pad must be soldered to PCB thermal plane. |
| 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/disables Regulator 2 independently. |
| VFB2 (Pin 8) | Channel 2 Feedback Input | Regulates VOUT2 to 0.6V reference; supports separate output voltages per channel. |
| VIN (Pin 9) | Main Power Input | Supplies both regulators; requires local 10μF ceramic + 0.1μF HF bypass capacitor. |
| GND (Pin 10) | Signal Ground | Reference for RUN/MODE pins; connects to same ground plane as Pin 5 for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent synchronous buck regulators | Enables split-rail power delivery (e.g., 1.2V core + 1.8V I/O) without cross-regulation or shared thermal stress. |
| Internally compensated for all-ceramic output capacitors | Eliminates need for ESR-based compensation networks; supports low-ESR X5R/X7R ceramics for minimal output ripple. |
| Independent soft-start per channel (≈750μs) | Prevents inrush current into output caps during power-up; avoids input rail droop in multi-rail systems. |
| Burst Mode® operation with <20mVP-P ripple | Maintains >85% efficiency at 1mA load while limiting output voltage deviation during sleep intervals. |
| Short-circuit protected with automatic recovery | Forces N-channel switch on longer per cycle to safely discharge inductor; resumes regulation immediately after fault removal. |
| 100% duty cycle low-dropout mode | Extends usable battery life down to VOUT + ~150mV (at 600mA), critical for end-of-discharge operation. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Dual-rail power for baseband processor (1.2V) and image sensor interface (1.8V) in slim handset designs. IC Role / Device Role / Timing Role: Primary dual-output DC/DC regulator managing battery-to-core conversion with independent enable control. Use Value: 96% peak efficiency and 35μA quiescent current directly extend talk time and standby duration under dynamic load profiles. |
Use Scenario: Powering CMOS image sensor (2.5V analog, 1.8V digital) and SD card interface (3.3V via LDO fed from LTC3419 output) in compact camera modules. IC Role / Device Role / Timing Role: High-frequency buck regulator supplying stable, low-noise rails with fast transient response to burst capture loads. Use Value: 2.25MHz switching enables miniature 2.2μH inductors and eliminates audible coil whine during video recording. |
| Wireless Modems | Portable Media Players |
Use Scenario: Providing 1.5V and 1.8V rails to Wi-Fi/BT SoC and RF front-end in USB-powered dongles with strict thermal limits. IC Role / Device Role / Timing Role: Dual-channel synchronous buck delivering regulated power with Burst Mode® for low-idle current in intermittent connectivity use. Use Value: <1μA shutdown current and 100% duty cycle operation ensure reliable wake-from-sleep functionality across full battery voltage range. |
Use Scenario: Supplying DSP core (1.2V), memory interface (1.8V), and audio codec (2.5V) in flash-based MP3 players with 8-hour playback target. IC Role / Device Role / Timing Role: Compact, thermally efficient dual buck converter replacing discrete solutions to meet height constraints (<1.2mm). Use Value: MSOP-10 package with exposed pad achieves 40°C/W θJA, enabling full 600mA/channel operation without heatsinking. |
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; 2.5–6V input; 3MHz switching; no dual-output capability. | Requires two ICs to replicate LTC3419EMS#PBF's dual-rail function; higher BOM count and board area. | Select only if higher per-channel current (>600mA) or tighter output tolerance (±1%) is required - not a functional replacement. |
| RT8059GQW | Dual-channel 600mA buck; 2.5–5.5V input; 1.5MHz switching; 0.6V reference; no Burst Mode®. | Lacks user-selectable light-load modes; fixed pulse-skipping only - higher light-load IQ (~50μA) and reduced efficiency below 10mA. | Consider when cost sensitivity outweighs efficiency requirements at microamp loads; verify thermal performance with 1.5MHz vs. 2.25MHz inductor sizing. |
Compared with TPS62150ARGTR and RT8059GQW, the LTC3419EMS#PBF uniquely combines true dual independent regulation, Burst Mode® for ultra-low IQ, and MSOP-10 packaging - making it the only option that maintains both functional integration and efficiency across full load range in space-limited portable designs.
Availability
LTC3419EMS#PBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, and wireless modems requiring stable component supply with guaranteed long-term manufacturability and consistent electrical specifications.
Supply support for LTC3419EMS#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 and maintains full product support, datasheet archives, and application engineering resources for legacy Linear parts including the LTC3419 series.
The LTC3419EMS#PBF belongs to Linear's high-frequency monolithic DC/DC converter family, designed specifically for portable battery-powered equipment where small size, high efficiency at light loads, and dual-output flexibility are critical.
FAQ
What is the maximum output current per channel for the LTC3419EMS#PBF?
The LTC3419EMS#PBF delivers up to 600mA per channel continuously under typical conditions (VIN = 3V, TA = 25°C). This rating holds across the full operating temperature range (–40°C to 125°C) and is validated with 3.3μH inductors and 10μF ceramic output capacitors. Derating applies above 85°C ambient due to thermal limits of the MSOP-10 package.
Does the LTC3419EMS#PBF support adjustable output voltages?
Yes, the LTC3419EMS#PBF supports fully adjustable outputs via external resistor dividers on VFB1 and VFB2 pins. With a precise 0.6V internal reference, outputs can be set from 0.6V to VIN – VDROP (e.g., 1.2V, 1.8V, 2.5V). Fixed-output versions (e.g., LTC3419-1) exist but the LTC3419EMS#PBF itself is the adjustable variant.
How does Burst Mode® operation work on the LTC3419EMS#PBF?
Burst Mode® on the LTC3419EMS#PBF activates when the MODE pin is grounded. It reduces light-load quiescent current to ~35μA by intermittently enabling full switching cycles only when output voltage droop exceeds a threshold. Each burst delivers ~60mA peak inductor current, minimizing switching losses while maintaining regulation - achieving >85% efficiency at 1mA load.
What is the thermal resistance (θJA) of the LTC3419EMS#PBF package?
The LTC3419EMS#PBF in its 10-lead MSOP package has a junction-to-ambient thermal resistance (θJA) of 120°C/W, measured per JEDEC JESD51-7 with 1-inch² 2-oz copper pad. This value assumes the exposed pad (Pin 5) is soldered to a solid ground plane. Without proper pad soldering, θJA degrades significantly - reducing maximum continuous output current capability.
Can the LTC3419EMS#PBF operate with ceramic input and output capacitors?
Yes, the LTC3419EMS#PBF is fully compatible with ceramic capacitors on both input and output. Its internal compensation is optimized for zero-ESR ceramics, eliminating stability risks. Use X5R or X7R dielectrics (e.g., 10μF 0805 X7R at VIN, 10μF 0805 X5R at VOUT) - but add a 0.1μF ceramic close to VIN for high-frequency decoupling to prevent ringing.
LTC3419EMS#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
LTC3419EMS#PBF FAQ
1.How can I place an order for LTC3419EMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419EMS#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 LTC3419EMS#PBF reliable?
The price and inventory of LTC3419EMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3419EMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC3419EMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419EMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419EMS#PBF?
LTC3419EMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419EMS#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 LTC3419EMS#PBF?
For technical support, including LTC3419EMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419EMS#PBF requirements.
6.How does Aetrix verify that LTC3419EMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3419EMS#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 LTC3419EMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC3419EMS#PBF?
All LTC3419EMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419EMS#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 LTC3419EMS#PBF part is unused and in its original packaging.
Return procedure for LTC3419EMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3419EMS#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
