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Analog Devices Inc. LTC3407AEMSE#PBF
- Part No.:
- LTC3407AEMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3407AEMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:534
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Product details
Overview
LTC3407AEMSE#PBF 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, switches at a fixed 1.5MHz frequency, and supports adjustable output voltages from 0.6V to 5V - enabling compact designs with 2.2μH inductors and 10μF ceramic capacitors. Its dual-regulator architecture powers core logic and I/O rails in space-constrained battery-powered devices.
For engineers reviewing the LTC3407AEMSE#PBF datasheet, LTC3407AEMSE#PBF pinout, LTC3407AEMSE#PBF application, or LTC3407AEMSE#PBF equivalent, key selection criteria include its 0.35Ω internal P-channel MOSFET RDS(ON), 40μA quiescent current in Burst Mode, ±8.5% POR threshold accuracy, 10-lead MSOP package with exposed thermal pad, and mode-selectable operation (Burst vs. Pulse Skip) for noise-efficiency trade-offs.
Technical Context
The LTC3407AEMSE#PBF implements a constant-frequency current-mode control architecture with shared 1.5MHz oscillator across both channels, supporting in-phase switching and external synchronization via the MODE/SYNC pin. Each channel features independent RUN/SS enable/soft-start inputs and dedicated VFB feedback pins referenced to a precision 0.6V internal bandgap.
It integrates matched P-channel high-side and N-channel synchronous rectifier switches per channel, eliminating external Schottky diodes. Dropout operation maintains 100% duty cycle with continuous P-MOSFET conduction, while the POR open-drain output asserts low when either output deviates beyond ±8.5% of regulation and releases after 65,536 clock cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, or 3.3V/5V system rails without pre-regulation. |
| Switching Frequency | 1.5MHz (typ) - enables use of sub-3mm-height inductors (e.g., 2.2μH) and small ceramic capacitors for ultra-thin PCBs. |
| Output Current per Channel | 600mA - sufficient for powering DSP cores, FPGA I/O banks, or camera sensor subsystems. |
| Feedback Reference Voltage | 0.6V ±1.2% - sets output voltage via external resistor divider; enables precise 1.2V, 1.8V, 2.5V, or 3.3V rails. |
| Quiescent Current | 40μA (Burst Mode, both channels active) - extends battery runtime in standby or low-load states. |
| Shutdown Current | <1μA - minimizes battery drain during full system sleep or power-off modes. |
| Output Voltage Range | 0.6V to 5V - covers core voltages for ARM Cortex-M microcontrollers, memory interfaces, and analog front-ends. |
Pinout & Package
Package: 10-lead plastic MSOP (MSE) with exposed thermal pad (Pin 11 = PGND), 3mm × 3mm footprint, 1.1mm max height - optimized for thermal performance in dense portable layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 Feedback Input | Connects to resistive divider on VOUT1; regulates output by comparing divided voltage to 0.6V reference. |
| RUN/SS1 (Pin 2) | Channel 1 Enable & Soft-Start | High = enable; low = shutdown; RC network here controls startup slew rate and inrush limiting. |
| VIN (Pin 3) | Main Power Input | Supplies both regulators; requires local 10μF ceramic decoupling to GND for EMI suppression. |
| SW1 (Pin 4) | Channel 1 Switch Node | Connects to inductor; swings between VIN and GND; layout must minimize loop area to reduce radiated noise. |
| GND (Pin 5) | Analog & Power Ground | Common return for CIN, COUT, and feedback resistors; ties to exposed pad (Pin 11) for thermal conduction. |
| MODE/SYNC (Pin 6) | Mode Selection & Sync Input | Tie to VIN = Burst Mode (high efficiency); tie to GND = Pulse Skip Mode (low ripple); accept external 1.5MHz clock. |
| SW2 (Pin 7) | Channel 2 Switch Node | Identical function to SW1; independent inductor connection required for each channel. |
| POR (Pin 8) | Power-On Reset Output | Open-drain signal pulled low if either VOUT is out of ±8.5% regulation; releases after 44ms (pulse skip) or burst-dependent delay. |
| RUN/SS2 (Pin 9) | Channel 2 Enable & Soft-Start | Independent control for second regulator; enables staggered power-up sequencing. |
| VFB2 (Pin 10) | Channel 2 Feedback Input | Same function as VFB1; allows independent voltage setting for dual-rail systems (e.g., 1.8V + 2.5V). |
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. |
| Selectable light-load operation | Burst Mode reduces IQ to 40μA; Pulse Skip Mode maintains 1.5MHz switching for <35mVP-P output ripple at 50mA. |
| 100% duty-cycle dropout | Enables regulation down to VOUT ≈ VIN − ILOAD×RDS(ON); critical for battery voltage sag during peak loads. |
| Integrated power-on reset | POR output provides system-level reset timing aligned to actual output regulation - not just VIN ramp. |
| Thermally enhanced MSOP | Exposed PGND pad (Pin 11) lowers θJA to 45°C/W; supports 600mA/channel continuous operation at 85°C ambient. |
Applications
| Mobile Baseband Processing | Digital Camera Sensor Power |
|---|---|
|
Use Scenario: Powering ARM9/ARM11 application processors and DDR memory I/O in smartphones. IC Role / Device Role / Timing Role: Dual-output regulator supplying 1.2V core and 2.8V I/O rails with independent soft-start sequencing. Use Value: 1.5MHz switching avoids AM radio band interference; 40μA Burst Mode IQ extends talk time between charges. |
Use Scenario: Providing clean, low-noise bias to CMOS image sensors and ISP cores in compact cameras. IC Role / Device Role / Timing Role: Regulator 1 delivers 2.8V analog sensor rail; Regulator 2 supplies 1.8V digital ISP core with POR-synchronized startup. Use Value: Pulse Skip Mode ensures <35mVP-P ripple on analog rail; POR guarantees system reset only after both outputs stabilize. |
| Wireless Modem RF Front-End | PDA System-on-Module |
|
Use Scenario: Generating stable 3.3V PA bias and 1.8V baseband IC supply in LTE/5G USB dongles. IC Role / Device Role / Timing Role: Dual buck converter with MODE/SYNC synchronized to system clock to suppress beat frequencies. Use Value: External sync eliminates switching noise heterodynes in sensitive RF receive bands; 10-lead MSOP fits narrow PCB widths. |
Use Scenario: Consolidating power for CPU, SDRAM, and display controller in handheld PDAs. IC Role / Device Role / Timing Role: Primary DC/DC source delivering 1.5V CPU core and 3.3V peripheral bus rails from single Li-ion cell. Use Value: 2.5V–5.5V input range accommodates full battery discharge curve; 100% duty cycle maintains regulation down to 2.7V VIN. |
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 |
|---|---|---|---|
| TPS62125DSCR | Single-output, 3MHz fixed-frequency, 300mA; no POR or sync; 0.6V ref; 17μA IQ in DCS-Control™ mode. | Lacks dual output, POR, and synchronization - suitable only for simpler single-rail systems. | Choose when board space is extremely limited and only one regulated rail is needed. |
| RT8059NGQW | Dual-output, 2MHz, 600mA/channel; 0.6V ref; no POR; 30μA IQ in auto-skip mode; WDFN-10L 3×3mm package. | Missing power-on reset and external sync capability; lower thermal resistance but no guaranteed ±8.5% POR accuracy. | Prefer when lowest possible quiescent current is critical and POR functionality is handled externally. |
Compared with TPS62125DSCR and RT8059NGQW, the LTC3407AEMSE#PBF uniquely combines dual independent regulation, integrated POR with timing accuracy, external synchronization, and robust 100% duty-cycle dropout - making it the only option for space-constrained, battery-powered systems requiring coordinated multi-rail power sequencing and reliable system reset.
Availability
LTC3407AEMSE#PBF is available at Aetrix Electronics and suitable for mobile computing, imaging modules, and wireless modem designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3407AEMSE#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 continues its legacy of high-performance power management ICs with rigorous process control and automotive-grade reliability testing.
The LTC3407AEMSE#PBF belongs to Linear's precision dual buck regulator product line, designed specifically for portable electronics where board area, battery life, and multi-rail sequencing integrity are critical constraints.
FAQ
What is the operating temperature range for the LTC3407AEMSE#PBF?
The LTC3407AEMSE#PBF 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 over this full range. The "E" in the part number explicitly denotes the industrial temperature grade.
Does the LTC3407AEMSE#PBF require external Schottky diodes?
No, the LTC3407AEMSE#PBF does not require external Schottky diodes. It integrates synchronous rectification using internal N-channel MOSFETs for the bottom switch in each channel, as stated in the DESCRIPTION and FEATURES sections. This eliminates conduction losses and improves efficiency compared to asynchronous designs.
How does the POR function work on the LTC3407AEMSE#PBF?
The POR pin on the LTC3407AEMSE#PBF is an open-drain output that remains low until both regulated outputs are within ±8.5% of their target voltages for 65,536 oscillator cycles (~44ms in Pulse Skip Mode). If either channel is disabled or out of regulation, POR stays asserted low - providing a hardware reset signal tied directly to actual output stability, not just input voltage.
Can the LTC3407AEMSE#PBF be synchronized to an external clock?
Yes, the LTC3407AEMSE#PBF can be synchronized to an external 1.5MHz clock applied to the MODE/SYNC pin (Pin 6). When an external clock is detected, the device automatically enters Pulse Skip Mode and aligns its top-switch turn-on edge to the rising edge of the incoming signal - enabling noise-sensitive systems to avoid beat frequencies.
What is the maximum output current per channel for the LTC3407AEMSE#PBF?
The LTC3407AEMSE#PBF delivers up to 600mA per channel continuously under typical conditions (TA ≤ 85°C, proper PCB layout with thermal pad soldered). This is specified in the DEVICE DESCRIPTION and confirmed in the TYPICAL APPLICATION diagram showing "2.5V/1.8V at 600mA Step-Down Regulators". Peak switch current limit is 1A (min), ensuring headroom for transient loads.
LTC3407AEMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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):
- 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#PBF FAQ
1.How can I place an order for LTC3407AEMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407AEMSE#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 LTC3407AEMSE#PBF reliable?
The price and inventory of LTC3407AEMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407AEMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3407AEMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407AEMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407AEMSE#PBF?
LTC3407AEMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407AEMSE#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 LTC3407AEMSE#PBF?
For technical support, including LTC3407AEMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407AEMSE#PBF requirements.
6.How does Aetrix verify that LTC3407AEMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3407AEMSE#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 LTC3407AEMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3407AEMSE#PBF?
All LTC3407AEMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407AEMSE#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 LTC3407AEMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3407AEMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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