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Analog Devices Inc. LTC3407IDD-2#PBF
- Part No.:
- LTC3407IDD-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3407IDD-2#PBF.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:140
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Product details
Overview
LTC3407IDD-2#PBF from Analog Devices is a dual-channel synchronous step-down DC/DC regulator delivering up to 800mA per channel, operating from 2.5V to 5.5V input, with fixed 2.25MHz switching frequency and adjustable output voltages from 0.6V to 5V. It integrates 0.35Ω P-channel and 0.30Ω N-channel MOSFETs, supports Burst Mode® and pulse-skipping operation, and targets space-constrained portable power rails in digital cameras and cellular phones.
For engineers reviewing the LTC3407IDD-2#PBF datasheet, LTC3407IDD-2#PBF pinout, LTC3407IDD-2#PBF application, or LTC3407IDD-2#PBF equivalent, key selection criteria include its –40°C to 125°C automotive-grade temperature range, 40µA quiescent current in active mode, 100% duty-cycle dropout capability, and dual independent RUN/feedback control for sequenced power delivery.
Technical Context
The LTC3407IDD-2#PBF employs a constant-frequency current-mode architecture with shared 2.25MHz oscillator across both channels, enabling in-phase switching and precise load transient response. Its error amplifier compares VFB to a 0.6V reference, modulating peak inductor current via ITH voltage to maintain regulation.
Burst Mode® operation disables switching cycles when load demand drops below ~10mA, reducing gate charge losses and achieving 95% efficiency at light loads; pulse-skipping mode maintains fixed-frequency operation down to sub-mA loads for low-noise applications, with external synchronization supported via MODE/SYNC pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, USB, and regulated 3.3V/5V rails without pre-regulation |
| Switching Frequency | 2.25MHz (typ) - enables use of 2.2µH inductors and 10µF ceramic capacitors with ≤1.2mm profile |
| Output Current per Channel | 800mA - sufficient for core logic, memory, and interface ICs in portable systems |
| Feedback Reference Voltage | 0.6V ±12mV (–40°C to 125°C) - sets output accuracy and enables precise 1.8V/2.5V/3.3V rails via resistor divider |
| Quiescent Current | 40µA (total, both channels) - extends battery life in always-on subsystems like real-time clocks or sensors |
| Shutdown Current | <1µA - ensures minimal leakage during system sleep states |
| Internal Switch RDS(ON) | 0.35Ω (P-ch), 0.30Ω (N-ch) - eliminates need for external Schottky diodes and improves full-load efficiency |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed PGND pad (Pin 11), thermally enhanced for industrial and automotive ambient temperatures up to 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistive divider to set VOUT1; 0.6V reference enables accurate 0.6–5V adjustment |
| RUN1 (Pin 2) | Channel 1 enable control | High = enabled, low = shutdown; supports independent sequencing of dual outputs |
| VIN (Pin 3) | Main power input | Supplies both regulators; requires local 10µF ceramic decoupling to minimize high-frequency noise |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor; swings between VIN and GND; layout critical for EMI and efficiency |
| GND (Pin 5) | Analog ground reference | Separate from PGND; must be tied to quiet ground plane under IC for error amp stability |
| MODE/SYNC (Pin 6) | Mode selection & sync input | VIN = Burst Mode®, GND = pulse-skipping, external clock = synchronized operation |
| SW2 (Pin 7) | Channel 2 switch node | Independent switch path; identical timing and drive strength to SW1 |
| POR (Pin 8) | Power-on reset open-drain output | Pulled low if either VOUT deviates >±8.5%; releases after 262,144 cycles (~117ms) in regulation |
| RUN2 (Pin 9) | Channel 2 enable control | Functionally identical to RUN1; allows staggered startup or fault isolation |
| VFB2 (Pin 10) | Channel 2 feedback input | Independent regulation loop; supports different VOUT1/VOUT2 configurations |
| PGND (Pin 11) | Power ground thermal pad | Mandatory PCB connection to solid ground plane; primary thermal path and return for high-current switches |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent synchronous buck topology | Eliminates external diodes, reduces BOM count, and enables compact 2-rail solutions with matched transient response |
| Burst Mode® operation | Extends battery runtime by reducing quiescent current to 40µA while maintaining regulation at microamp loads |
| 100% duty-cycle dropout | Enables seamless transition to linear regulation as VIN approaches VOUT, avoiding brownout during battery discharge |
| Externally synchronizable oscillator | Prevents beat frequencies in multi-regulator systems and simplifies EMI filtering by locking all clocks to master source |
| AEC-Q100 qualified variant available | LTC3407IDD-2#PBF meets automotive reliability standards for under-hood and infotainment applications |
Applications
| Digital Camera Core Power | Cellular Phone Baseband |
|---|---|
Use Scenario: Dual-rail supply for image sensor (1.8V) and ISP processor (2.5V) in ultra-thin camera modules. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering regulated, low-noise power with fast load-step response to handle burst capture and video streaming. Use Value: 2.25MHz switching enables <1.2mm height design; Burst Mode® extends standby time between shots without compromising startup latency. |
Use Scenario: Independent power domains for RF transceiver (2.8V) and application processor (1.2V) in 4G/LTE handsets. IC Role / Device Role / Timing Role: Dual-output buck regulator supporting dynamic voltage scaling and independent enable sequencing during modem sleep/wake cycles. Use Value: 40µA quiescent current minimizes leakage in always-on LTE control logic; POR output coordinates system reset with power rail stabilization. |
| Portable Media Player Audio Codec | Wireless Modem PHY Interface |
Use Scenario: Clean, low-ripple 3.3V and 1.8V supplies for DAC/ADC and digital audio controller in Bluetooth headphones. IC Role / Device Role / Timing Role: Low-noise power source with pulse-skipping mode selected to suppress switching artifacts near sensitive analog audio paths. Use Value: Pin-selectable mode eliminates need for external logic; 0.6V reference ensures tight tolerance on critical codec bias rails. |
Use Scenario: Dual 1.2V and 2.5V rails for Wi-Fi/Bluetooth SoC and RF front-end in compact IoT gateways. IC Role / Device Role / Timing Role: High-efficiency, thermally robust regulator operating continuously in hot environments with minimal heatsinking. Use Value: 3mm × 3mm DFN package fits dense RF layouts; 125°C rating ensures reliability in enclosed enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62150ARGTR | Single-channel, 1A output, 2.5MHz fixed frequency, 0.6V reference, but no dual-output or POR functionality | Requires two devices for dual-rail designs; lacks power-good signaling and independent RUN control | Select only when single-rail simplicity outweighs dual-channel integration benefits |
| RT8070ZSP | Dual-channel, 600mA/channel, 1.5MHz switching, 0.6V reference, but higher 100µA quiescent current and no Burst Mode® | Lower efficiency at light loads; no AEC-Q100 qualification; limited thermal performance in DFN package | Consider for cost-sensitive consumer applications where automotive temp range and ultra-low IQ are not required |
Compared with TPS62150ARGTR and RT8070ZSP, the LTC3407IDD-2#PBF uniquely delivers dual 800mA outputs with integrated POR, 40µA quiescent current, and AEC-Q100 support in a single 3mm × 3mm DFN - making it optimal for space-constrained, battery-powered systems requiring coordinated dual-rail power management.
Availability
LTC3407IDD-2#PBF is available at Aetrix Electronics and suitable for digital cameras, cellular phones, and wireless modems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3407IDD-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets.
The LTC3407-2 product line delivers highly integrated, thermally robust dual-output DC/DC converters optimized for portable and automotive applications demanding small size, low quiescent current, and reliable multi-rail power delivery.
FAQ
What is the maximum junction temperature specification for the LTC3407IDD-2#PBF?
The LTC3407IDD-2#PBF has a maximum junction temperature (TJMAX) of 125°C, validated across its –40°C to 125°C ambient operating range. This rating is supported by θJA = 45°C/W and θJC = 10°C/W thermal metrics in the 3mm × 3mm DFN package, enabling reliable operation in automotive cabin and industrial edge environments without forced air cooling.
How does the MODE/SYNC pin affect LTC3407IDD-2#PBF operation in Burst Mode® versus pulse-skipping mode?
When MODE/SYNC is tied to VIN, the LTC3407IDD-2#PBF enters Burst Mode®-disabling switching cycles at light loads to achieve 40µA quiescent current. When tied to GND, it uses pulse-skipping mode-maintaining 2.25MHz switching while skipping pulses to reduce output ripple. External clock injection forces pulse-skipping and synchronizes both channels to the master source.
Can the LTC3407IDD-2#PBF operate with input voltage below 2.5V?
No-the LTC3407IDD-2#PBF has a specified minimum input voltage of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this threshold risks undervoltage lockout activation or unstable regulation; the device incorporates an internal UVLO circuit that shuts down below ~1.65V to prevent malfunction.
What is the purpose of the POR pin on the LTC3407IDD-2#PBF, and how is it timed?
The POR (Power-On Reset) pin on the LTC3407IDD-2#PBF is an open-drain output pulled low when either output deviates beyond ±8.5% of its target voltage. It releases high after 262,144 oscillator cycles (~117ms at 2.25MHz) once both channels achieve regulation, providing a system-level reset signal synchronized to power rail stability-not just startup timing.
Does the LTC3407IDD-2#PBF require external compensation components?
No-the LTC3407IDD-2#PBF features internally compensated control loops for both channels. Its current-mode architecture with fixed 2.25MHz frequency and integrated error amplifiers eliminates the need for external compensation networks, simplifying layout and reducing bill-of-materials for standard 2.2µH inductor and 10µF ceramic capacitor designs.
LTC3407IDD-2#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:
- 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-DFN (3x3)
LTC3407IDD-2#PBF FAQ
1.How can I place an order for LTC3407IDD-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407IDD-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 LTC3407IDD-2#PBF reliable?
The price and inventory of LTC3407IDD-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 LTC3407IDD-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC3407IDD-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407IDD-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407IDD-2#PBF?
LTC3407IDD-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407IDD-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 LTC3407IDD-2#PBF?
For technical support, including LTC3407IDD-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407IDD-2#PBF requirements.
6.How does Aetrix verify that LTC3407IDD-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3407IDD-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 LTC3407IDD-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC3407IDD-2#PBF?
All LTC3407IDD-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407IDD-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 LTC3407IDD-2#PBF part is unused and in its original packaging.
Return procedure for LTC3407IDD-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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