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Analog Devices Inc. LTC3407EMSE#TRPBF
- Part No.:
- LTC3407EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3407EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,155
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Product details
Overview
LTC3407EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, synchronous step-down DC/DC converter IC designed for low-power portable systems. It operates from 2.5V to 5.5V input, delivers up to 600mA per channel, switches at a fixed 1.5MHz frequency, and supports adjustable output voltages from 0.6V to 5V - enabling compact power solutions in space-constrained PDA and cellular phone designs.
For engineers reviewing the LTC3407EMSE#TRPBF datasheet, LTC3407EMSE#TRPBF pinout, LTC3407EMSE#TRPBF application, or LTC3407EMSE#TRPBF equivalent, key selection criteria include its dual-output synchronous architecture, 40μA quiescent current in active mode, Burst Mode® vs pulse-skipping mode trade-off, integrated 0.35Ω P-channel and 0.30Ω N-channel MOSFETs, and MSOP-10 thermally enhanced package with exposed PGND pad.
Technical Context
The LTC3407EMSE#TRPBF employs a constant-frequency, current-mode control architecture with shared 1.5MHz oscillator across both channels, enabling precise timing alignment and simplified EMI filtering. Its dual independent feedback loops (VFB1/VFB2) each reference a 0.6V internal bandgap, supporting independent output voltage programming via external resistor dividers.
Operation includes three distinct low-power states: continuous conduction mode (CCM), Burst Mode® (for peak efficiency down to μA loads), and pulse-skipping mode (for lowest output ripple). The MODE/SYNC pin serves dual function - selecting operating mode or accepting external synchronization clock - while POR provides open-drain power-on reset with ±8.5% detection threshold and 175ms delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V rail inputs without pre-regulation. |
| Switching Frequency | 1.5MHz (typ) - enables use of sub-3mm-height inductors and 10μF ceramic capacitors for ultra-compact layouts. |
| Output Current per Channel | 600mA - sufficient for core logic, memory, and I/O rails in handheld devices; limited by thermal design in MSOP-10. |
| Feedback Reference Voltage | 0.6V ±1.2% (–40°C to 85°C) - sets output accuracy and stability; used with external resistive divider for programmable VOUT. |
| Quiescent Current | 40μA (both channels active) - extends battery runtime in always-on subsystems such as real-time clocks or sensor interfaces. |
| Shutdown Current | <1μA - ensures negligible drain during system sleep or storage; critical for long shelf-life portable equipment. |
| Internal Switch RDS(ON) | 0.35Ω (P-ch top), 0.30Ω (N-ch bottom) - eliminates need for external Schottky diodes and reduces conduction loss at 600mA load. |
Pinout & Package
Package: 10-lead plastic MSOP (MSE) with 3mm × 3mm footprint and exposed power ground (PGND) pad (Pin 11) - optimized for thermal dissipation in high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistor divider on VOUT1; regulates output by comparing divided voltage to 0.6V reference. |
| RUN1 (Pin 2) | Channel 1 enable control | High = enable; low = shutdown; must be actively driven - floating causes undefined behavior. |
| VIN (Pin 3) | Main power input | Supplies both channels; requires local 10μF ceramic decoupling to minimize switching noise coupling. |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor L1; swings between VIN and GND; layout critical for EMI and efficiency. |
| GND (Pin 5) | Analog ground reference | Not internally connected; must tie to clean PCB ground plane near input/output caps and exposed pad. |
| MODE/SYNC (Pin 6) | Mode selection & sync input | Ground = pulse-skipping; VIN = Burst Mode®; external 1.5MHz clock = forced sync + pulse-skipping. |
| SW2 (Pin 7) | Channel 2 switch node | Identical function to SW1; requires symmetric layout with SW1 to avoid cross-talk. |
| POR (Pin 8) | Power-on reset output | Open-drain; pulled low if either VOUT deviates >±8.5%; releases after ~175ms when both regulated. |
| RUN2 (Pin 9) | Channel 2 enable control | Independent enable for second regulator; allows staggered power sequencing or dynamic channel disable. |
| VFB2 (Pin 10) | Channel 2 feedback input | Same function as VFB1; supports independent VOUT2 setting (e.g., 1.8V core + 2.5V I/O). |
| Exposed Pad (Pin 11) | Power ground (PGND) | Mandatory solder connection to PCB ground plane; primary thermal path and return for high-current switch paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous buck topology | Eliminates external Schottky diodes, reduces component count, and improves full-load efficiency to 96%. |
| Burst Mode® operation | Reduces quiescent current to 40μA while maintaining regulation - ideal for standby power in battery-backed systems. |
| 100% duty cycle dropout mode | Enables operation with VIN just above VOUT (e.g., 2.8V input → 2.5V output), preserving regulation during battery sag. |
| Externally synchronizable oscillator | Allows multiple LTC3407EMSE#TRPBF units or other converters to operate at same frequency - simplifies EMI filtering. |
| Integrated power-on reset (POR) | Provides system-level reset signal synchronized to both outputs' regulation status - no external supervisor IC needed. |
Applications
| Mobile Baseband Power | Digital Camera Core Supply |
|---|---|
Use Scenario: Powering ARM-based baseband processor cores and memory interfaces in 3G/4G smartphones. IC Role / Device Role / Timing Role: Dual-output regulator delivering 1.2V @ 600mA (core) and 2.85V @ 300mA (I/O) from single Li-ion cell. Use Value: 1.5MHz switching enables use of 2.2μH shielded inductors under 2mm height, meeting strict Z-height constraints in slim handset designs. |
Use Scenario: Supplying image sensor analog front-end and digital ISP in compact digital cameras. IC Role / Device Role / Timing Role: Provides low-noise 2.8V analog rail and tightly regulated 1.8V digital rail with independent enable control. Use Value: Pulse-skipping mode (via grounded MODE/SYNC) minimizes output ripple below 10mVpp, preventing sensor readout artifacts. |
| Wireless Modem RF Bias | PDA Application Processor Rail |
Use Scenario: Generating stable 3.3V bias for LTE/Wi-Fi power amplifiers in embedded modems. IC Role / Device Role / Timing Role: Single-channel operation (RUN2 = GND) with VOUT1 set to 3.3V; POR monitors regulation integrity. Use Value: 40μA quiescent current extends battery life during idle periods; 0.35Ω RDS(ON) limits dropout voltage to <200mV at 600mA. |
Use Scenario: Powering OMAP or PXA application processors in palmtop PCs with dynamic voltage scaling. IC Role / Device Role / Timing Role: Dual-channel configuration with RUN1/RUN2 controlled by processor GPIOs for sequenced power-up/down. Use Value: Independent enable pins allow software-controlled rail disabling - reducing system leakage by >99% during suspend states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | Single-channel, 3MHz fixed-frequency, 600mA; no Burst Mode®, higher IQ (24μA typical active) | Lacks dual output and POR; requires external reset IC; better suited for single-rail, high-frequency EMI-sensitive apps | Select only if single-output suffices and 3MHz operation is mandatory for filter size reduction. |
| RT8059NGQW | Dual-channel, 1.5MHz, 600mA/channel; no MODE/SYNC pin; fixed 200ms POR delay; higher RDS(ON) (0.45Ω) | No mode selection - fixed CCM only; less flexible for ultra-low-power standby; lower efficiency at light loads | Choose when cost sensitivity outweighs efficiency optimization and POR timing flexibility is not required. |
Compared with TPS62231DRYT and RT8059NGQW, the LTC3407EMSE#TRPBF uniquely combines dual independent outputs, selectable light-load modes, integrated POR, and industry-leading 40μA active quiescent current - making it optimal for battery-powered multi-rail systems where runtime and sequencing control are critical.
Availability
LTC3407EMSE#TRPBF is available at Aetrix Electronics and suitable for mobile computing, imaging modules, and wireless communication equipment requiring stable component supply, long-term manufacturability, and guaranteed traceable sourcing.
Supply support for LTC3407EMSE#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 (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 LTC3407EMSE#TRPBF belongs to Linear's µPower DC/DC converter family, engineered specifically for battery-operated portable electronics demanding ultra-low quiescent current, small solution size, and robust multi-rail power sequencing.
FAQ
What is the maximum output current per channel for the LTC3407EMSE#TRPBF?
The LTC3407EMSE#TRPBF is rated for up to 600mA per channel under typical thermal conditions using the MSOP-10 package with proper PCB copper area and airflow. Peak switch current limit is 1A (min), but sustained 600mA operation requires adequate thermal design - including connection of the exposed PGND pad to a ≥1cm² internal ground plane. Derating is necessary above 60°C ambient.
Does the LTC3407EMSE#TRPBF require external Schottky diodes?
No, the LTC3407EMSE#TRPBF does not require external Schottky diodes. It integrates synchronous P-channel (0.35Ω) and N-channel (0.30Ω) MOSFETs per channel, enabling high-efficiency operation without body-diode conduction losses. This integration reduces BOM count, board area, and thermal stress compared to asynchronous buck designs.
How does the MODE/SYNC pin affect LTC3407EMSE#TRPBF operation?
The MODE/SYNC pin on the LTC3407EMSE#TRPBF selects between Burst Mode® (pin tied to VIN) for highest light-load efficiency or pulse-skipping mode (pin tied to GND) for lowest output ripple. When driven by an external 1.5MHz clock, it forces pulse-skipping mode and synchronizes switching edges - essential for multi-converter EMI reduction in dense layouts.
What is the purpose of the POR pin on the LTC3407EMSE#TRPBF?
The POR (Power-On Reset) pin on the LTC3407EMSE#TRPBF is an open-drain output that remains low until both output voltages stabilize within ±8.5% of their target values for approximately 175ms (262,144 clock cycles). It provides a system-level reset signal usable by microcontrollers or FPGAs - eliminating the need for a separate supervisor IC in portable designs.
Can the LTC3407EMSE#TRPBF operate with input voltage below 2.5V?
No, the LTC3407EMSE#TRPBF has a specified minimum input voltage of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V may cause unstable regulation or shutdown due to internal UVLO activation at ~1.65V. For sub-2.5V inputs, consider the LTC3522 (1.8V–5.5V) or LTC3605 (2.5V–5.5V with different feature set) as alternatives.
LTC3407EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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):
- 5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3407EMSE#TRPBF FAQ
1.How can I place an order for LTC3407EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407EMSE#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 LTC3407EMSE#TRPBF reliable?
The price and inventory of LTC3407EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3407EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407EMSE#TRPBF?
LTC3407EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407EMSE#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 LTC3407EMSE#TRPBF?
For technical support, including LTC3407EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3407EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3407EMSE#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 LTC3407EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3407EMSE#TRPBF?
All LTC3407EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407EMSE#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 LTC3407EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3407EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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