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Analog Devices Inc. LTC3417AIDHC-1#TRPBF
- Part No.:
- LTC3417AIDHC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AIDHC-1#TRPBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
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Product details
Overview
LTC3417AIDHC-1#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel synchronous step-down DC/DC regulator with 1.5A and 1A output capability, operating at up to 4MHz switching frequency. It delivers adjustable output voltages from 0.8V to 5V per channel, features internal low-RDS(ON) MOSFETs (0.088Ω top/0.084Ω bottom for CH1; 0.16Ω/0.15Ω for CH2), and supports Burst Mode™ operation for 95% peak efficiency. It is designed for medium-power point-of-load regulation in space-constrained industrial and automotive systems.
For engineers reviewing the LTC3417AIDHC-1#TRPBF datasheet, LTC3417AIDHC-1#TRPBF pinout, LTC3417AIDHC-1#TRPBF application, or LTC3417AIDHC-1#TRPBF equivalent, key selection considerations include its dual-channel phase control (in-phase or 180° out-of-phase), programmable 0.6–4MHz frequency via external resistor, POR output with ±6% threshold and 150ms de-assertion delay, and thermal performance in the 3mm × 5mm DFN package rated for –40°C to 125°C.
Technical Context
The LTC3417AIDHC-1#TRPBF employs a constant-frequency current-mode architecture shared across both channels, with independent RUN pins enabling asymmetric enable/disable control. Its PHASE pin selects synchronous (0V) or anti-phase (VIN) operation to reduce input RMS current stress-critical for minimizing input capacitor sizing and EMI.
Operation mode is set via SYNC/MODE pin voltage: >VIN–0.5V enables Burst Mode™ (low IQ = 125μA sleep, <1μA shutdown); <0.5V selects pulse-skip mode (low ripple); VIN/2 forces continuous conduction. The FREQ pin supports either fixed 1.5MHz (tied to VIN) or resistor-programmed 0.6–4MHz operation, with oscillator accuracy ±20% over temperature and input voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without pre-regulation. |
| Output Current | CH1: 1.5A min, CH2: 1A min - guaranteed minimum load capability with internal current limiting (ILIM1 = 2.1–2.5A, ILIM2 = 1.4–1.7A). |
| Feedback Voltage | 0.784V to 0.816V (±2%) - tight reference tolerance enables accurate 0.8–5V output setting with standard resistor dividers. |
| Quiescent Current | 125μA in Sleep Mode, <1μA in Shutdown - extends battery life in always-on or low-duty-cycle systems. |
| Switch RDS(ON) | CH1 top/bottom: 0.088Ω/0.084Ω @ 3.6V; CH2: 0.16Ω/0.15Ω - eliminates need for external Schottky diodes and improves full-load efficiency. |
| Power-On Reset | POR asserts low when either VOUT falls ≥8% below target; de-asserts after 212,992 cycles (~150ms) once both outputs recover to within –6% - provides reliable system reset signaling. |
| Operating Temp | –40°C to +125°C (I-grade) - qualified for under-hood automotive and industrial environments without derating. |
Pinout & Package
Package: 16-lead (3mm × 5mm) plastic DFN with exposed thermal pad (Pin 17 = PGND2/GNDD), θJA = 43°C/W. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (Pin 1) | N-channel driver ground for CH1 | Separate power ground path minimizes noise coupling between channels and improves current-sense accuracy. |
| SW1 (Pin 15) | CH1 switch node | Connects to CH1 inductor; swings from VIN1 to PGND1 - requires low-inductance layout and local ceramic decoupling. |
| PHASE (Pin 14) | Channel phase relationship control | Logic-high (VIN) → in-phase; logic-low (GND) → 180° out-of-phase - reduces input ripple RMS current by up to 30% vs in-phase operation. |
| GNDA (Pin 13) | Analog ground reference | Isolated analog return for feedback and compensation networks - must be tied to PGND at single point near IC for stability. |
| FREQ (Pin 12) | Oscillator frequency control | Tied to VIN → 1.5MHz; resistor to GND (e.g., 143kΩ) → ~1MHz; enables tradeoff between component size (high f) and efficiency (low f). |
| POR (Pin 11) | Open-drain power-on-reset output | Pulled low during output undervoltage; active-low reset signal compatible with microcontroller / FPGA reset inputs. |
| SYNC/MODE (Pin 9) | Mode selection & clock sync input | Selects Burst Mode™ (high), pulse-skip (low), or forced continuous (mid); also accepts external clock for synchronization. |
| RUN1/RUN2 (Pins 1/7) | Independent channel enable inputs | Logic-high enables respective regulator; both low → shutdown (<1μA IQ) - enables dynamic power sequencing and partial system sleep. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel phase control | 180° out-of-phase operation reduces input capacitor RMS current by ~25%, allowing smaller, lower-cost input bulk capacitors. |
| Burst Mode™ operation | Enables 95% peak efficiency at light loads while maintaining <35mVP-P output ripple - ideal for battery-powered standby modes. |
| Programmable 0.6–4MHz frequency | Supports ultra-compact 2mm-height inductors and ceramics; higher frequencies shrink solution size but require careful gate-drive optimization. |
| Internal soft-start & current limit | 1024-cycle digital soft-start prevents inrush; per-channel peak current limits (CH1: 2.1–2.5A, CH2: 1.4–1.7A) protect against short-circuit faults. |
| Dropout operation at 100% duty cycle | P-channel MOSFET remains fully on when VIN ≈ VOUT - maintains regulation down to VOUT + RDS(ON)·ILOAD, critical for brownout resilience. |
Applications
| GPS/Navigation Systems | Automotive Instrumentation |
|---|---|
Use Scenario: Dual-rail power for GPS RF front-end (1.8V) and baseband processor (2.5V) in compact vehicle-mounted units. IC Role / Device Role / Timing Role: Dual-output point-of-load regulator providing isolated, low-noise DC rails with synchronized switching to minimize conducted EMI. Use Value: Out-of-phase operation reduces input ripple, easing compliance with CISPR 25 Class 5 automotive EMC requirements. |
Use Scenario: Powering digital cluster displays, CAN transceivers, and sensor interfaces in instrument panels exposed to wide temperature swings. IC Role / Device Role / Timing Role: High-reliability dual buck converter delivering stable 3.3V and 5V rails from 5–16V battery input with integrated POR monitoring. Use Value: –40°C to +125°C rating and 125°C junction limit ensure uninterrupted operation during engine-off hot soak and cold cranking. |
| Industrial Power Supplies | General Purpose Point of Load DC/DC |
Use Scenario: Distributed power in PLC I/O modules requiring isolated 1.2V FPGA core and 3.3V I/O rails from 12V backplane. IC Role / Device Role / Timing Role: Dual synchronous buck regulator with independent RUN control enabling dynamic rail sequencing and partial system shutdown. Use Value: 125μA sleep current and <1μA shutdown IQ extend uptime in energy-harvesting and battery-buffered industrial controllers. |
Use Scenario: Compact, high-efficiency DC/DC conversion for FPGA, ASIC, or SoC evaluation boards where board space is constrained. IC Role / Device Role / Timing Role: Dual adjustable buck regulator supporting flexible voltage configurations (e.g., 1.0V/1.8V or 1.2V/3.3V) with minimal external components. Use Value: Integrated MOSFETs, programmable frequency, and 3mm × 5mm DFN package enable <150mm² total solution size including magnetics. |
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 |
|---|---|---|---|
| TPS65270RGET | Fixed 1.2V/3.3V outputs; no programmable frequency; 2.7–5.5V input; 1.5A/1.5A outputs; no POR pin. | Suitable for fixed-voltage applications only; lacks flexibility for custom VOUT or system-level reset signaling. | Choose TPS65270RGET only if fixed dual-rail outputs and TI ecosystem integration outweigh need for adjustable frequency and POR functionality. |
| MP2491DG-LF-Z | Single-channel 2A buck; no dual output or phase control; 4.5–18V input; 0.8–15V adjustable output; no integrated POR. | Requires two separate ICs to replicate dual-rail function; higher BOM count and layout complexity. | Use MP2491DG-LF-Z only when higher input voltage (>5.5V) or single-channel >1.5A capability is required - not a functional substitute for LTC3417AIDHC-1#TRPBF. |
Compared with TPS65270RGET and MP2491DG-LF-Z, the LTC3417AIDHC-1#TRPBF uniquely combines dual independently adjustable outputs, programmable switching frequency, integrated POR, and 180° phase control - making it the only option among the three that supports flexible, low-EMI, system-aware dual-rail power delivery in compact industrial and automotive designs.
Availability
LTC3417AIDHC-1#TRPBF is available at Aetrix Electronics and suitable for GPS navigation systems, automotive instrumentation clusters, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3417AIDHC-1#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3417A series was developed to address demand for compact, efficient dual-output DC/DC regulators in space- and thermal-constrained applications such as automotive infotainment and portable instrumentation - emphasizing precision regulation, low quiescent current, and robust fault handling.
FAQ
What is the maximum switching frequency supported by the LTC3417AIDHC-1#TRPBF?
The LTC3417AIDHC-1#TRPBF supports a maximum switching frequency of 4MHz when configured with an external resistor on the FREQ pin. At this frequency, the device enables use of miniature inductors ≤2mm in height and small ceramic capacitors, reducing overall solution footprint. Operation above 4MHz is not specified or guaranteed - the internal oscillator architecture limits usable range to 0.6–4MHz for stable current-mode control and adequate minimum on-time.
Does the LTC3417AIDHC-1#TRPBF require external Schottky diodes?
No, the LTC3417AIDHC-1#TRPBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs for both channels, with low RDS(ON) values (e.g., 0.088Ω/0.084Ω for CH1 at 3.6V). This synchronous rectification eliminates conduction losses associated with external diodes and improves full-load efficiency by up to 8% compared to asynchronous designs using discrete diodes.
How does the PHASE pin affect input capacitor stress in the LTC3417AIDHC-1#TRPBF?
The PHASE pin on the LTC3417AIDHC-1#TRPBF selects whether CH2 switches in-phase (PHASE = VIN) or 180° out-of-phase (PHASE = GND) with CH1. In out-of-phase mode, input current ripple RMS is reduced by up to 30% compared to in-phase operation - directly lowering thermal stress and required ripple-current rating of the input capacitor. This allows use of smaller, lower-cost bulk capacitors without compromising reliability.
What is the purpose and behavior of the POR pin on the LTC3417AIDHC-1#TRPBF?
The POR (Power-On-Reset) pin on the LTC3417AIDHC-1#TRPBF is an open-drain output that goes low when either regulated output falls ≥8% below its target voltage. It remains asserted for ~150ms after both outputs recover to within –6% of regulation - providing a clean, debounced system reset signal. If one channel is disabled (RUN = 0), POR reflects only the enabled channel's regulation status, enabling selective monitoring in asymmetric power schemes.
Can the LTC3417AIDHC-1#TRPBF operate with different input voltages on VIN1 and VIN2?
No - the LTC3417AIDHC-1#TRPBF requires VIN1 and VIN2 to be within 0.3V of each other (per Absolute Maximum Ratings). While the datasheet specifies separate VIN1 and VIN2 pins, they must be connected to the same input source. Applying significantly different voltages risks violating the |VIN1 – VIN2| ≤ 0.3V limit and may cause latch-up or permanent damage. The dual-VIN structure supports layout separation and local decoupling, not independent supply rails.
LTC3417AIDHC-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-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):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1A, 1.5A
- Frequency - Switching:
- 1.5MHz, 600kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3417AIDHC-1#TRPBF FAQ
1.How can I place an order for LTC3417AIDHC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AIDHC-1#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 LTC3417AIDHC-1#TRPBF reliable?
The price and inventory of LTC3417AIDHC-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3417AIDHC-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3417AIDHC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AIDHC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AIDHC-1#TRPBF?
LTC3417AIDHC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AIDHC-1#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 LTC3417AIDHC-1#TRPBF?
For technical support, including LTC3417AIDHC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AIDHC-1#TRPBF requirements.
6.How does Aetrix verify that LTC3417AIDHC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AIDHC-1#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 LTC3417AIDHC-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3417AIDHC-1#TRPBF?
All LTC3417AIDHC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AIDHC-1#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 LTC3417AIDHC-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3417AIDHC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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