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Analog Devices Inc. LTC3407AEMSE#TRPBF
- Part No.:
- LTC3407AEMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3407AEMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
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Product details
Overview
LTC3407AEMSE#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel synchronous step-down DC/DC converter optimized for low-power portable systems. It operates from 2.5V to 5.5V input, delivers up to 600mA per channel at adjustable output voltages (0.6V–5V), and switches at a fixed 1.5MHz frequency-enabling compact 1mm-height inductor and capacitor solutions. Its internal 0.35Ω P-channel and 0.30Ω N-channel MOSFETs eliminate external Schottky diodes, supporting high-efficiency operation in PDAs, digital cameras, and cellular handsets.
For engineers reviewing the LTC3407AEMSE#TRPBF datasheet, LTC3407AEMSE#TRPBF pinout, LTC3407AEMSE#TRPBF application, or LTC3407AEMSE#TRPBF equivalent, key selection considerations include its dual-output synchronous buck architecture, Burst Mode® vs Pulse Skip mode trade-offs, 40μA quiescent current in active light-load operation, 100% duty-cycle dropout capability, and MSOP-10 package with exposed thermal pad.
Technical Context
The LTC3407AEMSE#TRPBF employs a constant-frequency current-mode control architecture with shared 1.5MHz oscillator across both channels, enabling precise phase alignment and simplified EMI filtering. Each regulator features independent RUN/SS pins for enable/soft-start control, separate VFB inputs referenced to a trimmed 0.6V internal bandgap, and integrated overvoltage/undervoltage comparators feeding a common open-drain POR output.
Its MODE/SYNC pin serves dual functions: selecting between Burst Mode® (maximizing light-load efficiency at ~40μA IQ) and Pulse Skip Mode (minimizing output ripple), or synchronizing switching to an external clock source. The device enters 100% duty-cycle dropout when VIN approaches VOUT, with P-channel MOSFET RDS(ON) increasing as VIN decreases-requiring thermal validation under low-input, high-current conditions.
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 × 3mm, ≤1mm-height inductors and ceramic capacitors. |
| Output Current per Channel | 600mA continuous - sufficient for core logic, memory I/O, and camera sensor rails in portable devices. |
| Feedback Reference Voltage | 0.6V ±1.2% (–40°C to 85°C) - sets output voltage via external resistor divider; enables 0.6V–5V adjustment range. |
| Quiescent Current | 40μA total (both channels) - extends battery runtime in always-on subsystems like RTC or sensor monitoring. |
| Shutdown Current | <1μA - ensures negligible drain during system sleep or power-off states. |
| Peak Switch Current Limit | 1A (typ) - provides robust short-circuit protection while allowing margin for transient load surges. |
| Thermal Shutdown Threshold | 125°C junction - protects against sustained overload or poor PCB thermal design in sealed enclosures. |
Pinout & Package
Package: 10-lead plastic MSOP with exposed thermal pad (Pin 11 = PGND). Requires soldering of exposed pad to PCB ground plane for thermal performance and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistive divider on VOUT1; regulates output by comparing to 0.6V reference. |
| RUN/SS1 (Pin 2) | Channel 1 enable & soft-start | High = enable; low = shutdown; RC network here sets soft-start ramp time. |
| VIN (Pin 3) | Main power input | Supplies both regulators; requires local 10μF ceramic decoupling to GND. |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor; swings between VIN and GND; high dv/dt node requiring tight layout. |
| GND (Pin 5) | Analog and power ground | Reference for feedback, control logic, and internal circuits; must tie to low-impedance ground plane. |
| MODE/SYNC (Pin 6) | Mode selection & sync input | Tie to VIN for Burst Mode®, to GND for Pulse Skip Mode, or to external clock for synchronization. |
| SW2 (Pin 7) | Channel 2 switch node | Identical function to SW1; independent inductor connection required. |
| POR (Pin 8) | Power-on reset output | Open-drain; pulls low if either VOUT is outside ±8.5%; releases after 65,536 clock cycles (~44ms). |
| RUN/SS2 (Pin 9) | Channel 2 enable & soft-start | Functionally identical to RUN/SS1; enables independent control of second regulator. |
| VFB2 (Pin 10) | Channel 2 feedback input | Same role as VFB1; allows independent output voltage programming for dual-rail systems. |
| Exposed Pad (Pin 11) | Power ground (PGND) | Mandatory connection to PCB ground plane for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous buck topology | Eliminates external Schottky diodes; achieves up to 96% peak efficiency with integrated 0.35Ω/0.30Ω MOSFETs. |
| Burst Mode® operation | Reduces total quiescent current to 40μA at light loads while maintaining regulation-critical for standby battery life. |
| 100% duty-cycle dropout | Enables seamless transition to linear regulation as VIN drops near VOUT, avoiding abrupt shutdown in brownout conditions. |
| Externally synchronizable oscillator | Allows noise-sensitive systems (e.g., RF sections) to lock switching to a clean system clock, reducing beat frequencies. |
| Independent soft-start control | RUN/SS1 and RUN/SS2 pins permit staggered power-up sequencing-prevents inrush current stacking across multiple rails. |
| Power-On Reset (POR) with fault detection | Single open-drain output signals regulation status of both outputs; delays release until stable for ≥44ms (pulse skip mode). |
Applications
| Mobile Camera Module Power | Dual-Rail Microcontroller Core/I/O |
|---|---|
Use Scenario: Powering image sensor (1.8V), ISP core (1.2V), and interface I/O (3.3V) in smartphone rear-camera modules. IC Role / Device Role / Timing Role: Dual-output DC/DC regulator providing independently set, tightly regulated rails with fast transient response to burst capture loads. Use Value: Enables compact 1mm-height BOM using 2.2μH inductors and 10μF ceramic caps; Burst Mode® extends standby time between shots. |
Use Scenario: Supplying ARM Cortex-M microcontroller requiring 1.8V core and 3.3V I/O in industrial edge sensor nodes. IC Role / Device Role / Timing Role: Primary power management IC delivering two precision-adjustable outputs with coordinated soft-start and POR signaling. Use Value: Independent RUN/SS pins allow controlled power sequencing; POR output resets MCU only after both rails stabilize-preventing firmware lockup. |
| Wireless Modem Baseband | Portable Medical Diagnostic Device |
Use Scenario: Generating 1.2V DSP core and 2.5V RF transceiver supply in LTE/Wi-Fi modems with aggressive size constraints. IC Role / Device Role / Timing Role: High-frequency dual buck converter minimizing EMI through 1.5MHz fixed-frequency operation and optional external sync. Use Value: Synchronization to baseband clock eliminates heterodyne interference; Pulse Skip Mode ensures low-noise analog supply during signal acquisition. |
Use Scenario: Powering ADC front-end (2.5V), microcontroller (1.8V), and display driver (3.3V) in handheld ultrasound or glucose meters. IC Role / Device Role / Timing Role: Battery-efficient dual regulator with ultra-low shutdown current (<1μA) and guaranteed –40°C to 85°C operation. Use Value: 40μA light-load IQ preserves coin-cell or small Li-ion capacity during intermittent measurement cycles; MSOP package fits tight PCB real estate. |
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 |
|---|---|---|---|
| TPS62150ARGTR | Single-output 600mA buck; no second channel, no POR, no Burst Mode®; 2.5V–6V input; 3MHz switching. | Suitable only when one regulated rail is needed; lacks dual-rail coordination and system-level reset signaling. | Select only if second output is generated elsewhere; verify higher 3MHz frequency doesn't increase EMI in noise-sensitive designs. |
| MAX17504ATP+T | Dual-output, but asynchronous (external diode required); 4.5V–60V input; 200kHz–2.2MHz programmable frequency; no integrated POR. | Targeted at industrial/high-voltage apps; larger solution size due to external diodes and higher minimum input voltage. | Choose only for >6V input requirements; expect lower efficiency and larger footprint than LTC3407AEMSE#TRPBF. |
Compared with TPS62150ARGTR and MAX17504ATP+T, the LTC3407AEMSE#TRPBF uniquely integrates dual synchronous conversion, POR signaling, and selectable light-load modes in a thermally enhanced MSOP-10 package-making it optimal for space-constrained, battery-powered dual-rail systems demanding high efficiency and system-level reliability.
Availability
LTC3407AEMSE#TRPBF is available at Aetrix Electronics and suitable for portable medical devices, wireless modems, digital cameras, and industrial edge sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3407AEMSE#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 and maintains its legacy of high-performance power management ICs with rigorous automotive and industrial qualification standards.
The LTC3407AEMSE#TRPBF belongs to Linear's precision dual-output DC/DC converter product line, designed specifically for battery-powered portable electronics needing compact, efficient, and highly integrated power solutions with advanced light-load optimization.
FAQ
What is the operating temperature range for the LTC3407AEMSE#TRPBF?
The LTC3407AEMSE#TRPBF is rated for –40°C to +85°C ambient operation (E-grade). This is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section, where parameters like VFB and fOSC are specified across this full range. The "EMSE" suffix explicitly denotes the extended commercial temperature grade, distinct from the "IMSE" industrial variant (–40°C to +125°C).
Does the LTC3407AEMSE#TRPBF require external Schottky diodes?
No, the LTC3407AEMSE#TRPBF does not require external Schottky diodes. It integrates synchronous rectification using internal P-channel (0.35Ω) and N-channel (0.30Ω) MOSFETs per channel, as stated in the DESCRIPTION and FEATURES sections. This design eliminates conduction losses associated with external diodes and improves efficiency across the full load range.
How does Burst Mode® operation affect the output voltage ripple of the LTC3407AEMSE#TRPBF?
In Burst Mode®, the LTC3407AEMSE#TRPBF reduces switching activity at light loads to minimize gate charge losses, resulting in higher peak-to-peak output voltage ripple-typically 35mVP-P as specified in the FEATURES section. This occurs because energy is delivered in discrete bursts rather than continuously. For low-ripple requirements, Pulse Skip Mode (selected by grounding MODE/SYNC) maintains constant 1.5MHz switching down to very light loads.
Can the LTC3407AEMSE#TRPBF be synchronized to an external clock source?
Yes, the LTC3407AEMSE#TRPBF can be synchronized to an external clock via the MODE/SYNC pin (Pin 6). When an external square wave within the 1.5MHz ±20% range is applied, the internal oscillator locks to it and automatically selects Pulse Skip Mode. This capability is documented in the PIN FUNCTIONS and APPLICATIONS INFORMATION sections for EMI-sensitive system-level timing alignment.
What is the purpose of the exposed thermal pad on the LTC3407AEMSE#TRPBF MSOP package?
The exposed thermal pad (Pin 11) on the LTC3407AEMSE#TRPBF is designated PGND and must be soldered to the PCB ground plane. It serves two critical functions: (1) lowering thermal resistance (θJA = 45°C/W) to sustain 600mA/channel operation without exceeding 125°C junction temperature, and (2) providing a low-inductance return path for high-frequency switch currents-reducing noise coupling into sensitive analog circuitry.
LTC3407AEMSE#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
LTC3407AEMSE#TRPBF FAQ
1.How can I place an order for LTC3407AEMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407AEMSE#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 LTC3407AEMSE#TRPBF reliable?
The price and inventory of LTC3407AEMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407AEMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3407AEMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407AEMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407AEMSE#TRPBF?
LTC3407AEMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407AEMSE#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 LTC3407AEMSE#TRPBF?
For technical support, including LTC3407AEMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407AEMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3407AEMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3407AEMSE#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 LTC3407AEMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3407AEMSE#TRPBF?
All LTC3407AEMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407AEMSE#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 LTC3407AEMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3407AEMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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