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Analog Devices Inc. LTC3419EMS-1#PBF
- Part No.:
- LTC3419EMS-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3419EMS-1#PBF.pdf
- Description:
- IC REG BCK 1.575V/1.8V DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
LTC3419EMS-1#PBF 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-output-voltage rails (e.g., 1.575V/1.8V fixed outputs) for portable power management in battery-powered systems.
For engineers reviewing the LTC3419EMS-1#PBF datasheet, LTC3419EMS-1#PBF pinout, LTC3419EMS-1#PBF application, or LTC3419EMS-1#PBF equivalent, key selection criteria include dual independent enable control (RUN1/RUN2), user-selectable Burst Mode® vs pulse-skipping operation, internal compensation for ceramic output capacitors, and 100% duty cycle dropout capability.
Technical Context
The LTC3419EMS-1#PBF implements a constant-frequency current-mode control architecture with shared 2.25MHz oscillator and in-phase switching across both channels. Each regulator features independent soft-start, internal slope compensation, and anti-shoot-through logic to ensure stable operation with ceramic output capacitors.
It operates in three distinct load regimes: continuous conduction mode (CCM) at medium-to-heavy loads, pulse-skipping mode (when MODE = VIN) for low-noise constant-frequency operation down to ~1mA, and Burst Mode® (when MODE = GND) for ultra-low quiescent current (<1μA shutdown, 35μA active) at light loads - enabling >96% peak efficiency and extended battery life.
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 subsystems in compact portable devices. |
| Switching Frequency | 2.25MHz (typ) - enables use of sub-4.7μH inductors and 10μF ceramic output capacitors, minimizing board area. |
| Feedback Reference Voltage | 0.6V (typ) - allows precise regulation of low-voltage rails (e.g., 1.2V, 1.5V, 1.8V) using standard resistor dividers. |
| Quiescent Current | 35μA (both channels active) - ensures minimal battery drain during system standby in always-on functions. |
| Shutdown Current | <1μA - critical for long-term storage or deep-sleep modes in IoT edge sensors and wearables. |
| Efficiency (Peak) | Up to 96% - achieved at mid-load (e.g., 100–300mA) with VOUT=1.8V, VIN=3.6V, enabling thermal-constrained designs. |
| Package | 10-Lead MSOP (0.118" width) - surface-mount, thermally enhanced package with exposed pad tied to GND for PCB heat sinking. |
Pinout & Package
Package: 10-Lead Plastic MSOP (0.118" wide), 0.75mm max height, exposed pad (Pin 5) soldered to PCB ground plane for thermal performance. Pin 5 is GND; Pin 6 is GND - both must be connected to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Regulates VOUT1 to 0.6V reference; connects to resistor divider from VOUT1 - sets output voltage via VOUT = 0.6 × (1 + R1/R2). |
| RUN1 (Pin 2) | Channel 1 enable control | High (≥1.2V) enables Regulator 1; low (≤0.4V) forces shutdown with <1μA quiescent draw - supports independent power sequencing. |
| MODE (Pin 3) | Operating mode select | GND selects Burst Mode® (max efficiency at light load); VIN selects pulse-skipping (constant frequency, lower ripple) - no floating allowed. |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor and catch diode (or synchronous rectifier); swings between VIN and GND - requires low-inductance layout to minimize EMI. |
| GND (Pin 5 & Pin 6) | Power and signal ground | Primary return path for input/output capacitors, inductor, and IC substrate - exposed pad (Pin 5) must be soldered for thermal integrity. |
| SW2 (Pin 8) | Channel 2 switch node | Independent switch node for second buck stage - enables dual-rail generation (e.g., 1.575V + 1.8V) from single input. |
| RUN2 (Pin 9) | Channel 2 enable control | Functionally identical to RUN1 - allows independent on/off control of second regulator for dynamic power domain management. |
| VFB2 (Pin 10) | Channel 2 feedback input | Regulates VOUT2 to 0.6V reference - supports different output voltage than VOUT1 via separate resistor network. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous generation of two optimized voltage rails (e.g., core CPU + I/O) with separate RUN control and soft-start timing. |
| Internally compensated for ceramic capacitors | Eliminates need for external compensation components - simplifies design, reduces BOM count, and improves stability with low-ESR ceramics. |
| 100% duty cycle low-dropout operation | Maintains regulation as VIN approaches VOUT (e.g., 2.7V input → 1.8V output), extending usable battery voltage range by ~150mV. |
| Independent soft-start per channel | ~750μs monotonic ramp-up prevents inrush current into output capacitors - avoids input rail sag and protects upstream power sources. |
| Burst Mode® with <1μA shutdown | Reduces no-load power consumption by >97% vs active mode - essential for battery lifetime in intermittently active applications like remote sensors. |
| Short-circuit protected outputs | Automatically limits peak inductor current and reduces switching frequency during output short - prevents thermal runaway without external circuitry. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core (1.2V) and memory interface (1.8V) from single Li-ion cell. IC Role / Device Role / Timing Role: Dual-buck regulator providing independently sequenced, low-noise, high-efficiency DC/DC conversion. Use Value: Enables 2.5V–5.5V input compatibility with aging battery profiles while maintaining regulated 1.2V/1.8V rails under dynamic load transients. |
Use Scenario: Supplying image sensor analog front-end (2.5V) and digital controller (1.575V) in compact camera modules. IC Role / Device Role / Timing Role: Fixed-output dual regulator (LTC3419EMS-1#PBF) eliminating external feedback resistors for space-constrained PCB layouts. Use Value: Reduces component count and layout area by 30% vs discrete solutions while supporting burst-mode efficiency during standby imaging intervals. |
| Wireless Modems | Portable Media Players |
Use Scenario: Generating RF transceiver bias (1.8V) and baseband SoC core (1.575V) from USB 5V or battery input. IC Role / Device Role / Timing Role: Dual synchronous buck converter with independent RUN pins enabling modem sleep/wake power gating. Use Value: Achieves <1μA shutdown current per rail and fast wake-up (<1ms) - meeting 3GPP UE power class requirements for LTE/5G modems. |
Use Scenario: Powering audio DAC (1.8V), display driver (2.5V), and flash memory (1.575V) in MP3/MP4 players. IC Role / Device Role / Timing Role: Dual-channel step-down regulator with Burst Mode® optimizing battery runtime during audio playback and screen-off states. Use Value: Delivers >94% efficiency at 10mA load (Burst Mode®) and <20mVP-P ripple in pulse-skip mode - preserving audio SNR and display contrast. |
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; 3MHz switching; no dual-output or independent RUN control. | Suitable only for single-rail systems; lacks channel independence and fixed 1.575V/1.8V option. | Select when only one regulated rail is needed and board space is extremely constrained (2mm × 2mm QFN). |
| RTQ2132BGQW | Dual 600mA buck; 2.7–5.5V input; 2.4MHz; integrated MOSFETs; but no Burst Mode®, higher IQ (65μA active). | Higher light-load quiescent current reduces battery life in always-on sensor nodes; no 100% duty cycle dropout. | Prefer for noise-sensitive applications requiring constant-frequency operation without ripple trade-offs - not for ultra-low-power designs. |
Compared with TPS62150ARGTR and RTQ2132BGQW, the LTC3419EMS-1#PBF uniquely combines dual independent regulation, factory-fixed 1.575V/1.8V outputs, Burst Mode® efficiency below 1mA, and 100% duty cycle dropout - making it optimal for space- and battery-limited dual-rail portable electronics.
Availability
LTC3419EMS-1#PBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, and wireless modems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3419EMS-1#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and consumer markets.
The LTC3419 product line delivers highly integrated dual buck regulators targeting portable and battery-powered applications where small size, high efficiency at light loads, and dual independent power rails are critical design requirements.
FAQ
What is the fixed output voltage configuration of the LTC3419EMS-1#PBF?
The LTC3419EMS-1#PBF is the fixed-output variant of the LTC3419 family, with VOUT1 = 1.575V and VOUT2 = 1.8V set by internal resistor dividers. Unlike the adjustable LTC3419EMS#PBF, it requires no external feedback resistors - VFB1 and VFB2 are internally connected to their respective outputs, simplifying layout and reducing component count.
How does the MODE pin affect efficiency and output ripple in the LTC3419EMS-1#PBF?
When the MODE pin of the LTC3419EMS-1#PBF is grounded, it enables Burst Mode® operation - delivering >90% efficiency at 100μA load but with higher output ripple (~20mVP-P). When tied to VIN, it selects pulse-skipping mode - maintaining constant 2.25MHz switching and <10mVP-P ripple at the cost of ~5–10% lower light-load efficiency.
Can the LTC3419EMS-1#PBF operate with a 2.5V input while regulating 1.8V output?
Yes. The LTC3419EMS-1#PBF supports 100% duty cycle operation, allowing it to maintain regulation when VIN drops to within ~150mV of VOUT. At VIN = 2.5V and VOUT2 = 1.8V, the P-channel MOSFET remains fully enhanced, delivering regulated output with only RDS(ON) drop - verified in datasheet Figure G03 and Absolute Maximum Ratings.
What thermal considerations apply to the LTC3419EMS-1#PBF in MSOP package?
The LTC3419EMS-1#PBF in 10-lead MSOP has θJA = 120°C/W (JEDEC 2S2P board). To maintain TJ < 125°C at 600mA per channel, the exposed pad (Pin 5) must be soldered to ≥1cm² copper pour with ≥4 thermal vias. Derating is required above 60°C ambient - full 600mA output is only specified to 85°C junction temperature per Electrical Characteristics table.
Is the LTC3419EMS-1#PBF RoHS-compliant and lead-free?
Yes. The LTC3419EMS-1#PBF carries the #PBF suffix, indicating 100% matte tin lead finish, RoHS-compliant, and halogen-free construction. Per Analog Devices' packaging documentation, it meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and is rated for 260°C reflow peak temperature.
LTC3419EMS-1#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:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.575V, 1.8V
- Voltage - Output (Max):
- -
- 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-1#PBF FAQ
1.How can I place an order for LTC3419EMS-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419EMS-1#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-1#PBF reliable?
The price and inventory of LTC3419EMS-1#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-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3419EMS-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419EMS-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419EMS-1#PBF?
LTC3419EMS-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419EMS-1#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-1#PBF?
For technical support, including LTC3419EMS-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419EMS-1#PBF requirements.
6.How does Aetrix verify that LTC3419EMS-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3419EMS-1#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-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3419EMS-1#PBF?
All LTC3419EMS-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419EMS-1#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-1#PBF part is unused and in its original packaging.
Return procedure for LTC3419EMS-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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