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Analog Devices Inc. LTC3407AIDD#PBF
- Part No.:
- LTC3407AIDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3407AIDD#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,793
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Product details
Overview
LTC3407AIDD#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 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 internal 0.35Ω P-channel and 0.30Ω N-channel MOSFETs eliminate external Schottky diodes.
For engineers reviewing the LTC3407AIDD#PBF datasheet, LTC3407AIDD#PBF pinout, LTC3407AIDD#PBF application, or LTC3407AIDD#PBF equivalent, key selection considerations include its dual-output burst-mode efficiency (96% peak), 40μA quiescent current, 100% duty-cycle dropout operation, Power-On Reset (POR) output, and MODE/SYNC pin for noise-efficiency trade-off or external clock synchronization.
Technical Context
The LTC3407AIDD#PBF implements a constant-frequency current-mode control architecture with shared 1.5MHz oscillator across both channels, ensuring in-phase switching and predictable EMI behavior. Each channel features independent RUN/SS enable/soft-start inputs, dedicated VFB pins referenced to a precision 0.6V internal bandgap, and overvoltage/undervoltage detection feeding a common open-drain POR output.
Its MODE/SYNC pin serves three functions: selecting Burst Mode® (for <40μA IQ at light load) or Pulse Skip Mode (for lowest output ripple), and synchronizing the oscillator to an external clock source. The device enters 100% duty-cycle dropout when VIN approaches VOUT, with P-channel MOSFETs remaining fully enhanced - critical for battery-powered systems operating near end-of-discharge voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, or dual-cell alkaline/NiMH battery inputs without pre-regulation. |
| Switching Frequency | 1.5MHz (typ) - enables use of sub-3mm-height inductors (e.g., 2.2μH) and small ceramic capacitors, reducing board area and height. |
| Output Current per Channel | 600mA continuous - sufficient for powering core logic, memory, or RF ICs in handheld devices. |
| Feedback Reference Voltage | 0.6V ±12mV (–40°C to 125°C) - sets output accuracy and stability across industrial temperature range. |
| Quiescent Current | 40μA total (both channels active) - extends battery life in always-on or low-duty-cycle monitoring systems. |
| Shutdown Current | <1μA - ensures negligible drain during system sleep or storage modes. |
| Peak Switch RDS(ON) | 0.35Ω (P-ch top), 0.30Ω (N-ch bottom) - minimizes conduction loss and thermal rise at full load, eliminating need for external diodes. |
Pinout & Package
The LTC3407AIDD#PBF is housed in a thermally enhanced 10-lead (3mm × 3mm) plastic DFN package with exposed power ground pad (Pin 11). This package supports high-power-density layouts and efficient PCB heat sinking via the exposed pad soldered directly to GND plane.
| 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. |
| RUN/SS1 (Pin 2) | Channel 1 enable & soft-start | Pull ≥1.5V to enable; pull ≤0.3V to shut down; add RC network for controlled voltage ramp-up. |
| VIN (Pin 3) | Main power input | Supplies both channels; requires local 10μF ceramic decoupling close to pin for stable high-frequency operation. |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor; swings between VIN and GND; layout must minimize loop area to reduce EMI. |
| GND (Pin 5) | Analog & power ground | Reference for all signals; tie to PCB ground plane; connect CIN/COUT negative terminals here. |
| MODE/SYNC (Pin 6) | Mode selection & sync input | Tie to VIN for Burst Mode (high efficiency); tie to GND for Pulse Skip (low ripple); apply external clock for synchronization. |
| 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 deviates >±8.5%; releases after ~44ms (pulse skip) or variable delay (burst). |
| RUN/SS2 (Pin 9) | Channel 2 enable & soft-start | Functionally identical to RUN/SS1; allows independent sequencing or shutdown of second regulator. |
| VFB2 (Pin 10) | Channel 2 feedback input | Same role as VFB1; supports independent output voltage setting for dual-rail systems (e.g., 1.8V + 2.5V). |
| PGND (Pin 11) | Exposed pad / power ground | Mandatory connection to PCB GND plane; primary thermal path and low-impedance return for high-current switch paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous generation of two different output voltages (e.g., 1.8V core + 2.5V I/O) from single input, reducing BOM count and board space. |
| Burst Mode® operation | Reduces total quiescent current to 40μA while maintaining regulation - ideal for battery-backed real-time clocks or sensor wake-up circuits. |
| 100% duty-cycle dropout | Allows uninterrupted operation as input voltage drops to within ~200mV of output, extending usable battery capacity in portable systems. |
| Integrated MOSFETs with low RDS(ON) | Eliminates external Schottky diodes and associated footprint/cost; improves efficiency by 3–5% versus discrete solutions at 600mA. |
| Power-On Reset (POR) output | Provides system-level reset signaling when either output falls outside ±8.5% tolerance - simplifies microcontroller startup sequencing and fault detection. |
Applications
| Mobile Handheld Devices | Digital Imaging Systems |
|---|---|
Use Scenario: Powering application processor cores, memory interfaces, and display drivers in smartphones and tablets with tight height constraints. IC Role / Device Role / Timing Role: Dual-output buck regulator providing 1.2V/1.8V rails with fast transient response and minimal voltage droop during CPU burst loads. Use Value: Enables use of ultra-low-profile 1mm-height inductors and ceramic capacitors, meeting <1.2mm Z-height requirements for modern slim form factors. | Use Scenario: Supplying image sensor analog front-end (1.8V), digital logic (2.8V), and flash LED driver (3.3V) in compact digital cameras and action cams. IC Role / Device Role / Timing Role: Dual synchronous buck delivering tightly regulated, low-noise power with independent enable control for power domain sequencing. Use Value: Burst Mode operation extends battery runtime during standby; Pulse Skip Mode ensures clean power for noise-sensitive analog imaging blocks. |
| Wireless Communication Modules | Industrial IoT Edge Nodes |
Use Scenario: Powering LTE/Wi-Fi/BLE SoCs and RF transceivers in cellular modems, gateways, and M2M endpoints. IC Role / Device Role / Timing Role: Primary DC/DC converter generating core (1.1V) and I/O (3.3V) supplies with external clock synchronization to avoid RF interference bands. Use Value: 1.5MHz fixed frequency allows precise EMI filtering; MODE/SYNC pin enables alignment with system clock to shift switching harmonics away from sensitive receive bands. | Use Scenario: Providing reliable, long-life power to microcontrollers, sensors, and LoRaWAN radios in remote environmental monitors and predictive maintenance nodes. IC Role / Device Role / Timing Role: Dual buck regulator supporting wide-input (2.5–5.5V) battery or energy-harvesting sources with industrial-grade –40°C to 125°C operation. Use Value: 40μA quiescent current and <1μA shutdown current maximize multi-year battery life; POR output validates supply integrity before sensor sampling. |
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 |
|---|---|---|---|
| TPS62125DSCR | Single-output, 3MHz switching, 0.6V–5.5V adjustable, 300mA max, 17μA IQ | Lower current capability; no dual-output or POR; smaller solution size but less flexibility | Select when only one rail is needed and ultra-low IQ (<20μA) is prioritized over dual-rail functionality. |
| MP2144GJ-Z | Dual-output, 2MHz, 2.5V–5.5V, 600mA/channel, 45μA IQ, no POR, no Burst Mode | Lacks Power-On Reset and selectable low-noise/low-IQ mode; uses pulse-skip only | Choose when cost sensitivity outweighs need for POR signaling or adaptive light-load efficiency optimization. |
Compared with TPS62125DSCR and MP2144GJ-Z, the LTC3407AIDD#PBF uniquely combines dual independent outputs, integrated POR, selectable Burst/Pulse-Skip modes, and industrial temperature rating - making it optimal for space-constrained, battery-powered systems requiring robust power sequencing and long operational life.
Availability
LTC3407AIDD#PBF is available at Aetrix Electronics and suitable for mobile handheld devices, digital imaging systems, wireless communication modules, and industrial IoT edge nodes requiring stable component supply across extended temperature ranges.
Supply support for LTC3407AIDD#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.
The LTC3407AIDD#PBF belongs to ADI's Power Management product line, designed specifically for high-efficiency, low-noise, and space-constrained DC/DC conversion in portable and battery-operated systems.
FAQ
What is the operating temperature range of the LTC3407AIDD#PBF?
The LTC3407AIDD#PBF is rated for operation from –40°C to +125°C (ambient), making it suitable for industrial and automotive under-hood applications. This grade is confirmed by the "I" suffix in the part number and is guaranteed over the full range, unlike the "E" grade (–40°C to +85°C) which is characterized but not fully guaranteed.
Does the LTC3407AIDD#PBF require external Schottky diodes?
No, the LTC3407AIDD#PBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs with RDS(ON) of 0.35Ω and 0.30Ω respectively, enabling high-efficiency operation without external rectification components.
How does the MODE/SYNC pin affect LTC3407AIDD#PBF operation?
The MODE/SYNC pin on the LTC3407AIDD#PBF selects between Burst Mode® (tie to VIN for highest light-load efficiency, IQ = 40μA) and Pulse Skip Mode (tie to GND for lowest output ripple). It also accepts an external clock signal to synchronize switching frequency - preventing beat frequencies in multi-regulator systems.
What is the purpose of the POR pin on the LTC3407AIDD#PBF?
The POR (Power-On Reset) pin on the LTC3407AIDD#PBF is an open-drain output that remains low until both output voltages stabilize within ±8.5% of their target values, then asserts high after ~44ms (in Pulse Skip Mode). It provides system-level reset signaling for microcontrollers and FPGAs during power-up or brownout recovery.
Can the LTC3407AIDD#PBF operate in 100% duty cycle dropout mode?
Yes, the LTC3407AIDD#PBF supports 100% duty cycle operation: when VIN drops near VOUT, the P-channel MOSFET remains fully enhanced, allowing the output to track the input minus conduction losses. This extends usable battery life in portable systems operating down to ~2.7V input for a 2.5V output.
LTC3407AIDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC3407AIDD#PBF FAQ
1.How can I place an order for LTC3407AIDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407AIDD#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 LTC3407AIDD#PBF reliable?
The price and inventory of LTC3407AIDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407AIDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC3407AIDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407AIDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407AIDD#PBF?
LTC3407AIDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407AIDD#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 LTC3407AIDD#PBF?
For technical support, including LTC3407AIDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407AIDD#PBF requirements.
6.How does Aetrix verify that LTC3407AIDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3407AIDD#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 LTC3407AIDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC3407AIDD#PBF?
All LTC3407AIDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407AIDD#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 LTC3407AIDD#PBF part is unused and in its original packaging.
Return procedure for LTC3407AIDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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