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Analog Devices Inc. LTC3407EDD#TRPBF
- Part No.:
- LTC3407EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3407EDD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA DL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,907
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Product details
Overview
LTC3407EDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, synchronous step-down DC/DC converter IC designed 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 power delivery in space-constrained PDA and cellular phone applications.
For engineers reviewing the LTC3407EDD#TRPBF datasheet, LTC3407EDD#TRPBF pinout, LTC3407EDD#TRPBF application, or LTC3407EDD#TRPBF equivalent, key selection criteria include its dual-output capability with independent enable control, Burst Mode® vs pulse-skipping mode trade-offs, 40μA quiescent current in active operation, and compatibility with 2.2μH inductors and ceramic capacitors under 2mm height constraints.
Technical Context
The LTC3407EDD#TRPBF uses a constant-frequency, current-mode control architecture with shared 1.5MHz clocking across both channels and in-phase switching. Its internal P-channel high-side and N-channel low-side MOSFETs feature 0.35Ω and 0.30Ω RDS(ON), respectively, eliminating external Schottky diodes while supporting 100% duty-cycle dropout operation.
Mode selection via the MODE/SYNC pin enables either Burst Mode® (for ≤40μA total quiescent current at light loads) or pulse-skipping mode (for low-output-ripple operation), and the pin also accepts external synchronization signals up to 1.5MHz. The device integrates a power-on reset (POR) output with ±8.5% voltage monitoring and 175ms delay after regulation is achieved.
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 small 2.2μH inductors and 10μF ceramic capacitors ≤2mm height. |
| Output Current per Channel | 600mA - sufficient for core logic, memory, and peripheral rails in handheld devices. |
| Feedback Reference Voltage | 0.6V (±2%) - sets output via external resistor divider; enables precise 1.2V, 1.8V, 2.5V, or 3.3V generation. |
| Quiescent Current | 40μA (total, both channels) - extends battery runtime in always-on standby modes. |
| Shutdown Current | <1μA - minimizes leakage during system sleep or off-state. |
| Efficiency Peak | 96% - achieved at mid-load with 3.3VIN/1.8VOUT, reducing thermal load in sealed enclosures. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed power ground pad (Pin 11). Thermally enhanced layout requires soldering the exposed pad directly to PCB ground plane for θJA = 45°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Connects to resistor divider output; regulates VOUT1 to 0.6V reference - determines output voltage setting. |
| RUN1 (Pin 2) | Channel 1 enable control | High = enabled; low = shutdown; must be actively driven - supports independent sequencing of dual outputs. |
| VIN (Pin 3) | Main power input | Supplies both regulators; requires local 10μF ceramic decoupling - low-impedance path critical for EMI and transient response. |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor L1; swings between VIN and GND - high dv/dt node requiring tight layout and guard ring. |
| GND (Pin 5) | Analog ground reference | Separate from PGND pad; used for signal return - must tie to system ground near decoupling caps to avoid noise coupling. |
| MODE/SYNC (Pin 6) | Mode selection & sync input | VIN = Burst Mode®; GND = pulse-skipping; external clock = sync - single pin handles efficiency/noise trade-off and multi-device synchronization. |
| SW2 (Pin 7) | Channel 2 switch node | Connects to inductor L2; identical behavior to SW1 - requires symmetrical layout to minimize crosstalk. |
| POR (Pin 8) | Power-on reset open-drain output | Pulled low if either VOUT is outside ±8.5%; releases after ~175ms in regulation - used for processor reset or system initialization sequencing. |
| RUN2 (Pin 9) | Channel 2 enable control | Functionally identical to RUN1 - enables independent power-up/down control of second output rail. |
| VFB2 (Pin 10) | Channel 2 feedback input | Identical function to VFB1 - allows independent voltage programming for dual-rail systems (e.g., 1.8V + 2.5V). |
| Exposed Pad (Pin 11) | Power ground (PGND) | Mandatory connection to PCB ground plane - primary thermal and current return path for both switch nodes and input/output capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous buck topology | Eliminates external Schottky diodes and reduces BOM count - lowers solution cost and board area by ~30% vs nonsynchronous designs. |
| Burst Mode® operation | Reduces total quiescent current to 40μA while maintaining regulation - extends battery life in standby without compromising wake-up time. |
| 100% duty-cycle dropout | Enables VOUT tracking VIN down to VOUT + RDS(ON)•ILOAD - supports brownout operation in battery-powered systems nearing end-of-discharge. |
| Integrated POR with ±8.5% threshold | Provides reliable system reset without external supervisor IC - simplifies power sequencing in resource-constrained embedded designs. |
| Externally synchronizable oscillator | Allows multiple LTC3407EDD#TRPBF units to operate at same frequency and phase - eliminates beat frequencies and eases EMI filtering in multi-rail systems. |
Applications
| Mobile Handset Core Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Supplying 1.2V and 2.8V rails to baseband processor and RF transceiver in GSM/UMTS handsets with single Li-ion cell input. IC Role / Device Role / Timing Role: Dual-output DC/DC regulator providing independently enabled, low-noise, high-efficiency power conversion with fast load transient response. Use Value: Enables simultaneous core and I/O voltage scaling while maintaining <100mV output droop during 500mA load steps - critical for modem stability during data bursts. | Use Scenario: Generating clean 3.3V and 1.8V supplies for CMOS image sensor analog front-end and digital interface in compact digital cameras. IC Role / Device Role / Timing Role: Dual synchronous buck converter delivering regulated bias with minimal switching noise coupling into sensitive analog pixel circuitry. Use Value: Pulse-skipping mode reduces output ripple to <10mVpp at light loads - prevents image noise and fixed-pattern artifacts in low-light capture. |
| Portable Media Player Audio Codec | PDA Application Processor Core |
Use Scenario: Powering DAC/ADC and headphone amplifier stages in MP3 players using 3.7V Li-poly battery with strict EMI limits. IC Role / Device Role / Timing Role: Dual-channel step-down regulator operating in Burst Mode® to maintain >90% efficiency at 10–100mA audio playback loads. Use Value: 40μA quiescent current extends playback time by >15% versus comparable converters - directly improves user-rated battery life. | Use Scenario: Delivering 1.3V CPU core and 3.3V peripheral I/O rails in ARM-based PDAs with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: Synchronously switched dual buck regulator supporting independent RUN pin control for DVFS sequencing and low-power suspend states. Use Value: 100% duty-cycle dropout maintains 1.3V core supply down to 1.45V battery voltage - delays system shutdown until true end-of-life. |
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 |
|---|---|---|---|
| TPS62231DRYT | Single-channel, 600mA, 3MHz fixed-frequency converter; no dual-output or POR; 22μA IQ. | Requires two ICs for dual-rail design; lacks power-good signaling and independent enable. | Select when higher switching frequency and smaller inductors are prioritized over integration and sequencing features. |
| MAX17503ATP+T | Dual-channel, 1A per channel, 400kHz–2.2MHz programmable frequency; external compensation; no integrated POR. | Higher current capability but larger solution size; requires additional supervisor IC for reset functionality. | Select for industrial applications needing higher output current and wide input range (4.5V–60V), not portable battery-powered use. |
Compared with TPS62231DRYT and MAX17503ATP+T, the LTC3407EDD#TRPBF uniquely combines dual 600mA outputs, integrated POR, 40μA quiescent current, and 1.5MHz operation in a 3mm × 3mm DFN - making it optimal for space- and battery-life-constrained portable electronics where system-level integration reduces component count and improves reliability.
Availability
LTC3407EDD#TRPBF is available at Aetrix Electronics and suitable for mobile handset power management, digital camera sensor biasing, portable media player audio subsystems, PDA application processor core supplies, and wireless modem DC/DC conversion requiring stable component supply across production lifecycles.
Supply support for LTC3407EDD#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, 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 LTC3407EDD#TRPBF belongs to Linear's µPower DC/DC converter product line, engineered specifically for ultra-low-quiescent-current, high-efficiency power delivery in battery-powered portable electronics - emphasizing small footprint, thermal robustness, and seamless integration with microprocessor power sequencing.
FAQ
What is the maximum output current per channel for the LTC3407EDD#TRPBF?
The LTC3407EDD#TRPBF delivers up to 600mA per channel continuously under typical conditions (TA = 25°C, 3.3VIN/1.8VOUT). Peak switch current limit is guaranteed at 1A per channel, but sustained output is limited by thermal dissipation in the 3mm × 3mm DFN package. Derating is required above 85°C ambient or with poor PCB copper area.
Does the LTC3407EDD#TRPBF require external Schottky diodes?
No, the LTC3407EDD#TRPBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs with 0.35Ω and 0.30Ω RDS(ON), respectively, enabling high-efficiency operation without external rectification components - reducing bill-of-materials cost and PCB area.
How does the MODE/SYNC pin affect operation of the LTC3407EDD#TRPBF?
The MODE/SYNC pin on the LTC3407EDD#TRPBF selects between Burst Mode® (pin tied to VIN) for ultra-low quiescent current or pulse-skipping mode (pin tied to GND) for low-output-ripple performance. When driven by an external clock, it synchronizes switching frequency to that source and forces pulse-skipping mode - ensuring deterministic timing in multi-regulator systems.
What is the purpose of the POR pin on the LTC3407EDD#TRPBF?
The POR (Power-On Reset) pin on the LTC3407EDD#TRPBF is an open-drain output that remains low when either output voltage deviates by more than ±8.5% from its setpoint. After both channels achieve regulation, it releases high after ~175ms (262,144 clock cycles), providing a reliable reset signal for microcontrollers or FPGAs - eliminating need for external reset supervisors.
Can the LTC3407EDD#TRPBF operate with a 2.5V input supply?
Yes, the LTC3407EDD#TRPBF operates with a minimum input voltage of 2.5V, making it compatible with single-cell Li-ion (2.7–4.2V) and Li-polymer batteries. At 2.5V input, it supports 100% duty-cycle dropout for outputs down to ~2.3V (accounting for RDS(ON) drop), and maintains Burst Mode® efficiency with total quiescent current below 40μA.
LTC3407EDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN 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-DFN (3x3)
LTC3407EDD#TRPBF FAQ
1.How can I place an order for LTC3407EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3407EDD#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 LTC3407EDD#TRPBF reliable?
The price and inventory of LTC3407EDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3407EDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3407EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3407EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3407EDD#TRPBF?
LTC3407EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3407EDD#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 LTC3407EDD#TRPBF?
For technical support, including LTC3407EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3407EDD#TRPBF requirements.
6.How does Aetrix verify that LTC3407EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3407EDD#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 LTC3407EDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3407EDD#TRPBF?
All LTC3407EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3407EDD#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 LTC3407EDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3407EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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