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Analog Devices Inc. LTC3407AIMSE-2#PBF
- Part No.:
- LTC3407AIMSE-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3407AIMSE-2#PBF.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:175
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Product details
Overview
LTC3407AIMSE-2#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, synchronous step-down DC/DC converter optimized for low-power portable applications. It operates from 2.5V to 5.5V input, delivers up to 800mA per channel, features 2.25MHz fixed-frequency switching, 0.6V feedback reference, and integrated 0.35Ω P-channel / 0.30Ω N-channel MOSFETs - enabling compact 1mm-height inductor solutions in handheld devices.
For engineers reviewing the LTC3407AIMSE-2#PBF datasheet, LTC3407AIMSE-2#PBF pinout, LTC3407AIMSE-2#PBF application, or LTC3407AIMSE-2#PBF equivalent, key selection criteria include its –40°C to 125°C operating temperature range, Burst Mode® vs Pulse-Skipping mode trade-off, dual independent soft-start (RUN/SS1 & RUN/SS2), and Power-On Reset (POR) with ±8.5% regulation window and 29ms release delay.
Technical Context
The LTC3407AIMSE-2#PBF uses a constant-frequency current-mode control architecture with shared 2.25MHz clock across both channels, enabling precise phase alignment and predictable EMI behavior. Its error amplifier compares VFB1/VFB2 against a trimmed 0.6V reference, adjusting peak inductor current via ITH voltage to maintain regulation under line and load transients.
It supports three operational modes via MODE/SYNC pin: Burst Mode® (40μA IQ, highest light-load efficiency), Pulse-Skipping (lowest output ripple), or external synchronization (2.25MHz lock). Dropout operation enables 100% duty cycle with continuous P-channel switch conduction when VIN approaches VOUT, while short-circuit protection and thermal shutdown ensure robustness.
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 | 2.25MHz (typ) - enables use of sub-3mm-height inductors and <10μF ceramic output capacitors. |
| Output Voltage Range | 0.6V to 5V (adjustable per channel) - set by external resistor divider; 0.6V reference allows low-voltage core logic rails. |
| Max Output Current | 800mA per channel - sustained delivery with internal 1.2A peak switch current limit (ILIM). |
| Quiescent Current | 40μA (Burst Mode®, both channels active) - extends battery life in standby states of portable electronics. |
| Feedback Reference | 0.6V ±2% (–40°C to 125°C) - high-accuracy reference enables tight output regulation over full temp range. |
| Operating Temp Range | –40°C to +125°C - qualified for automotive infotainment, industrial IoT, and extended-temperature embedded systems. |
Pinout & Package
Package: 10-Lead Plastic MSOP (MSE), thermally enhanced, exposed pad (Pin 11) connected to PGND. Pin pitch: 0.5mm. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Regulator 1 Feedback Input | Connects to resistive divider; regulates VOUT1 to 0.6V × (1 + R1/R2); 30nA input bias minimizes divider current loss. |
| RUN/SS1 (Pin 2) | Regulator 1 Enable & Soft-Start | High = enable; RC network on this pin sets soft-start ramp time (e.g., 4.7MΩ + 680pF ≈ 1ms at 3.3V). |
| VIN (Pin 3) | Main Power Input | Supplies both channels; requires local 10μF ceramic decoupling; absolute max 6V. |
| SW1 (Pin 4) | Regulator 1 Switch Node | Connects to inductor; swings between VIN and GND; layout critical for EMI and efficiency. |
| GND (Pin 5) | Main Signal Ground | Reference for all analog circuitry; must be tied to exposed pad (PGND) and CIN/COUT negatives. |
| MODE/SYNC (Pin 6) | Mode Selection & Sync Input | VIN = Burst Mode®; GND = Pulse-Skipping; external 2.25MHz signal = sync mode (forces Pulse-Skipping). |
| SW2 (Pin 7) | Regulator 2 Switch Node | Identical function to SW1; independent inductor connection required for dual-output operation. |
| POR (Pin 8) | Power-On Reset Output | Open-drain; pulls low if either VOUT deviates >±8.5%; releases after 65,536 clock cycles (~29ms in Pulse-Skip). |
| RUN/SS2 (Pin 9) | Regulator 2 Enable & Soft-Start | Independent control of second channel; identical functionality to RUN/SS1. |
| VFB2 (Pin 10) | Regulator 2 Feedback Input | Independent regulation path; same 0.6V reference and bias as VFB1. |
| Exposed Pad (Pin 11) | Power Ground (PGND) | Mandatory PCB solder connection to system ground plane; primary thermal path (θJC = 10°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Two fully configurable 800mA buck channels with separate RUN/SS, VFB, and SW pins - eliminates need for two discrete converters in space-constrained designs. |
| Burst Mode® operation | 40μA total quiescent current at light loads - extends battery runtime in always-on sensor nodes and standby modes without sacrificing regulation accuracy. |
| No external Schottky diodes | Integrated synchronous rectification with 0.35Ω/0.30Ω RDS(ON) MOSFETs - reduces BOM count, improves efficiency >95%, and eliminates reverse recovery losses. |
| 100% duty-cycle dropout | P-channel MOSFET remains fully on when VIN ≤ VOUT + IRDS(ON) - maintains regulated output down to input voltages near the output rail. |
| Power-On Reset (POR) | Guaranteed ±8.5% detection window and programmable release timing - provides reliable system-level reset signaling for microcontrollers and FPGAs. |
| Thermally enhanced MSOP | 10-lead MSOP with exposed PGND pad (θJA = 45°C/W) - supports 800mA/channel operation in ambient temperatures up to 125°C with minimal heatsinking. |
Applications
| Mobile Handheld Devices | Digital Imaging Systems |
|---|---|
Use Scenario: Power management in smartphones and feature phones requiring dual-core SoC rails (e.g., 1.8V CPU + 2.5V camera ISP). IC Role / Device Role / Timing Role: Dual synchronous buck regulator delivering tightly regulated, independently enabled 0.6–5V outputs with fast transient response. Use Value: 2.25MHz switching enables <1mm-height inductors and eliminates audible coil whine; Burst Mode® extends talk time by >20% during idle periods. |
Use Scenario: Compact digital cameras needing isolated, low-noise power for CMOS image sensors and DSP processors. IC Role / Device Role / Timing Role: Dual-channel DC/DC with independent soft-start prevents sensor reset glitches during power-up sequencing. Use Value: Pulse-Skipping mode reduces output ripple to <10mVPK-PK at light loads - critical for low-noise analog pixel readout circuits. |
| Wireless Modems | Industrial Control Nodes |
Use Scenario: LTE/5G modem modules in portable hotspots where thermal headroom is limited and battery life is critical. IC Role / Device Role / Timing Role: High-efficiency dual regulator powering RF transceiver (3.3V) and baseband processor (1.2V) from single Li-ion cell. Use Value: –40°C to 125°C rating ensures reliable startup and operation in outdoor enclosures; 100% duty cycle maintains regulation during brownout events. |
Use Scenario: Programmable logic controllers (PLCs) and edge gateways requiring stable dual-rail power in harsh factory environments. IC Role / Device Role / Timing Role: Industrial-grade dual buck supplying FPGA core (1.0V) and I/O bank (3.3V) with POR-driven system reset coordination. Use Value: Exposed PGND pad and 45°C/W θJA enable full 800mA/channel operation without forced air - reducing system cooling complexity. |
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 POR or dual independent RUN pins. | Requires two ICs for dual-rail designs; lacks power-good signaling and soft-start flexibility. | Select only when single-output requirement exists and footprint density is secondary to cost. |
| LTC3636EMSE#PBF | Dual 1A buck; 2.7–15V input; 500kHz–2.25MHz programmable frequency; includes I2C interface and telemetry. | Higher voltage capability and digital control add complexity; larger MSOP-16 package; higher BOM cost. | Prefer when input >5.5V or telemetry/monitoring (VIN, IOUT, die temp) is required for predictive maintenance. |
Compared with TPS62150ARGTR and LTC3636EMSE#PBF, the LTC3407AIMSE-2#PBF uniquely balances dual-channel integration, ultra-low IQ (40μA), compact MSOP-10 footprint, and industrial temperature grade - making it optimal for space- and battery-constrained dual-rail applications below 5.5V input.
Availability
LTC3407AIMSE-2#PBF is available at Aetrix Electronics and suitable for mobile handheld devices, digital imaging systems, wireless modems, and industrial control nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3407AIMSE-2#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 precision instrumentation, communications, and industrial markets.
The LTC3407A family was designed specifically for ultra-compact, high-efficiency dual-output power conversion in battery-powered portable electronics - emphasizing low IQ, small magnetics, and robust thermal performance in miniature packages.
FAQ
What is the maximum junction temperature and thermal resistance of the LTC3407AIMSE-2#PBF?
The LTC3407AIMSE-2#PBF has a maximum junction temperature (TJMAX) of 125°C, with thermal resistance θJA = 45°C/W and θJC = 10°C/W. The exposed pad (Pin 11) must be soldered to a solid PGND plane to achieve these ratings. At 800mA per channel and 3.6V input, proper PCB copper area is essential to maintain TJ < 125°C in 85°C ambient.
Does the LTC3407AIMSE-2#PBF support independent voltage setting for each output?
Yes, the LTC3407AIMSE-2#PBF supports fully independent output voltage configuration: VOUT1 is set by the resistor divider on VFB1, and VOUT2 by the divider on VFB2. Each feedback pin references the same 0.6V internal reference, allowing outputs from 0.6V to 5V - e.g., 1.2V for a processor core and 3.3V for I/O, simultaneously.
How does Burst Mode® operation affect output voltage ripple on the LTC3407AIMSE-2#PBF?
In Burst Mode®, the LTC3407AIMSE-2#PBF reduces switching activity at light loads, resulting in higher peak-to-peak output ripple (<35mVPK-PK typical) compared to Pulse-Skipping mode (<10mVPK-PK). This trade-off delivers 40μA total quiescent current - ideal for battery longevity when low-noise is secondary to efficiency.
Can the LTC3407AIMSE-2#PBF be synchronized to an external clock source?
Yes, the MODE/SYNC pin of the LTC3407AIMSE-2#PBF accepts an external 2.25MHz clock signal to synchronize switching across multiple converters. When synchronized, the device automatically enters Pulse-Skipping mode and aligns top-switch turn-on to the rising edge of the external clock - reducing system-level EMI peaks.
What is the purpose and behavior of the POR pin on the LTC3407AIMSE-2#PBF?
The POR (Power-On Reset) pin on the LTC3407AIMSE-2#PBF is an open-drain output that pulls low whenever either VOUT1 or VOUT2 deviates by more than ±8.5% from its target. After both outputs stabilize within regulation, POR releases high after 65,536 clock cycles (~29ms in Pulse-Skipping mode), providing a clean, glitch-free reset signal to downstream logic.
LTC3407AIMSE-2#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:
- 800mA
- 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-EP
LTC3407AIMSE-2#PBF FAQ
1.How can I place an order for LTC3407AIMSE-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407AIMSE-2#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 LTC3407AIMSE-2#PBF reliable?
The price and inventory of LTC3407AIMSE-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407AIMSE-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC3407AIMSE-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407AIMSE-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407AIMSE-2#PBF?
LTC3407AIMSE-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407AIMSE-2#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 LTC3407AIMSE-2#PBF?
For technical support, including LTC3407AIMSE-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407AIMSE-2#PBF requirements.
6.How does Aetrix verify that LTC3407AIMSE-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3407AIMSE-2#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 LTC3407AIMSE-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC3407AIMSE-2#PBF?
All LTC3407AIMSE-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407AIMSE-2#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 LTC3407AIMSE-2#PBF part is unused and in its original packaging.
Return procedure for LTC3407AIMSE-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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