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Analog Devices Inc. LTC3417AEDHC-1#TRPBF
- Part No.:
- LTC3417AEDHC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AEDHC-1#TRPBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,820
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Product details
Overview
LTC3417AEDHC-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 across a 2.25V–5.5V input range. It delivers adjustable output voltages from 0.8V to 5V per channel, features integrated low-RDS(ON) P/N-channel MOSFETs, and includes Power-On-Reset (POR), phase-selectable operation, and three light-load modes - used in GPS navigation systems and automotive instrumentation.
For engineers reviewing the LTC3417AEDHC-1#TRPBF datasheet, LTC3417AEDHC-1#TRPBF pinout, LTC3417AEDHC-1#TRPBF application, or LTC3417AEDHC-1#TRPBF equivalent, key selection criteria include guaranteed 1.5A/1A output current, 0.8V feedback reference, 100μA quiescent current in dropout, 150ms POR de-assertion delay, and DFN-16 (3mm × 5mm) thermal performance with exposed PGND pad.
Technical Context
The LTC3417AEDHC-1#TRPBF employs a constant-frequency current-mode control architecture shared between both channels, with programmable oscillator frequency (0.6–4MHz via FREQ pin resistor or fixed 1.5MHz when tied to VIN). Its dual-regulator design supports independent RUN pin control, in-phase or 180° out-of-phase switching (via PHASE pin), and synchronized external clock input on SYNC/MODE.
Each channel uses internal error amplifiers (transconductance = 1400μS) comparing VFB to a precise 0.8V reference (±2% over temperature), with ITH pins setting peak current limit thresholds. The device implements undervoltage lockout (UVLO at 2.07V), short-circuit protection, and dropout operation with 100% duty cycle enabled by continuous P-MOSFET conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and industrial 3.3V/5V rails without pre-regulation. |
| Output Current (CH1 / CH2) | 1.5A / 1A minimum - guarantees full load capability under worst-case thermal conditions in DFN package. |
| Switching Frequency | 0.6MHz to 4MHz - enables use of sub-2mm-height inductors and compact ceramic capacitors. |
| Feedback Reference Voltage | 0.8V ±2% - sets output voltage accuracy and stability across temperature and line/load variations. |
| Quiescent Current (Active) | 400–600μA - minimizes standby power loss in battery-powered portable systems. |
| Shutdown Current | <1μA - preserves battery life during system sleep or off-state. |
| POR Threshold Deviation | –6% (rising), –8% (falling) - provides reliable reset assertion for downstream logic during brownout. |
| Thermal Resistance θJA | 43°C/W - measured on DFN-16 package with exposed PGND pad soldered to PCB ground plane. |
Pinout & Package
Package: 16-lead (3mm × 5mm) plastic DFN with exposed thermal pad (Pin 17 = PGND2/GNDD), rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (Pin 16) | N-channel switch return for CH1 | Low-inductance ground path for high di/dt SW1 node; must be connected to local power ground plane. |
| SW1 (Pin 15) | CH1 switch node | Connects to inductor L1; swings between VIN1 and PGND1; requires tight layout to minimize EMI. |
| PHASE (Pin 14) | Channel phase relationship control | Logic-high = in-phase; logic-low = 180° out-of-phase - reduces RMS input current and input capacitor stress. |
| GNDA (Pin 13) | Analog ground reference | Separate AGND for internal error amplifiers and reference; should tie to PGND at single point near VIN decoupling. |
| FREQ (Pin 12) | Oscillator frequency set | Tied to VIN → 1.5MHz; resistor to GND → 0.6–4MHz - determines size/cost tradeoff of magnetics and capacitors. |
| POR (Pin 11) | Open-drain power-on-reset output | Pulled low when either VOUT falls >8% below regulation; releases after ~150ms once both outputs recover to within –6%. |
| SW2 (Pin 10) | CH2 switch node | Connects to inductor L2; swings between VIN2 and PGND2; shares same layout constraints as SW1. |
| SYNC/MODE (Pin 9) | Mode selection & clock sync | VIN–0.5V = Burst Mode (high efficiency); <0.5V = Pulse Skip (low ripple); VIN/2 = Forced Continuous (fixed-frequency noise). |
| RUN1 (Pin 1) | CH1 enable input | Logic-high ≥0.85V enables 1.5A regulator; 0V disables CH1 and contributes to shutdown when both RUN pins are low. |
| RUN2 (Pin 7) | CH2 enable input | Logic-high ≥0.85V enables 1A regulator; independent control allows staggered startup or dynamic power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent RUN pin control | Enables per-channel power sequencing, fault isolation, and dynamic load management without external logic. |
| 180° out-of-phase switching option | Reduces input RMS current by ~30%, lowering stress on input capacitor and improving EMI profile. |
| Burst Mode® operation | Achieves >90% efficiency at 1mA load with <35mVP-P output ripple - extends battery runtime in always-on sensors. |
| Integrated low-RDS(ON) MOSFETs | 0.088Ω (top)/0.084Ω (bottom) for CH1 and 0.16Ω/0.15Ω for CH2 - eliminates Schottky diodes and saves board space. |
| Programmable soft-start via ITH pins | Internal digital soft-start ramps peak current over 1024 clock cycles - prevents inrush current and output overshoot. |
| Dropout operation with 100% duty cycle | Maintains regulation down to VIN ≈ VOUT + ILOAD×RDS(ON) - critical for Li-ion end-of-discharge support. |
Applications
| GPS/Navigation Systems | Automotive Instrumentation |
|---|---|
Use Scenario: Dual-rail power for RF front-end (1.8V) and baseband processor (2.5V) in compact automotive GPS modules. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable, low-noise DC power with fast transient response to RF and digital sections. Use Value: 4MHz operation enables ultra-small 1.5μH/2.2μH inductors; POR ensures clean MCU reset during cold-cranking voltage dips. |
Use Scenario: Powering digital cluster displays and CAN interface ICs in instrument panels with wide input voltage tolerance. IC Role / Device Role / Timing Role: Dual-output buck converter supplying 3.3V for microcontroller and 5V for analog sensors from 6–16V vehicle battery. Use Value: UVLO (2.07V) prevents erratic behavior during engine start; 100μA dropout IQ preserves display memory during ignition-off. |
| Industrial PC Cards | General Purpose Point-of-Load |
Use Scenario: Compact power solution for PCIe Mini Card peripherals requiring isolated 1.2V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Dual synchronous buck regulator with independent RUN control enabling hot-plug sequencing and power gating. Use Value: Phase-selectable operation reduces input capacitance requirements; TSSOP/DFN packages fit constrained card-edge layouts. |
Use Scenario: Flexible DC/DC supply for FPGA I/O banks, ADC references, or optical transceiver biasing in telecom and test equipment. IC Role / Device Role / Timing Role: Adjustable dual-output regulator supporting multiple voltage domains with precision 0.8V reference and tight load regulation (±0.2%). Use Value: Three selectable light-load modes allow optimization for efficiency (Burst), noise (Pulse Skip), or EMI filtering (Forced Continuous). |
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 |
|---|---|---|---|
| TPS65270RGET | Fixed 1.2V/3.3V outputs; no programmable frequency; higher 2.95–6.5V input range; 1.2A/1.2A rating. | Suitable for fixed-rail embedded systems but lacks adjustable VOUT and fine-grained light-load mode control. | Select when board space permits larger QFN package and fixed outputs simplify BOM. |
| ISL85412IRZ-T7A | Single 2A output; no dual-channel integration; supports 3–40V input; includes PMBus interface and telemetry. | Used where higher input voltage or digital monitoring is required, but requires two ICs for dual-rail designs. | Choose when system demands wide VIN, remote diagnostics, or higher single-channel current beyond 1.5A. |
Compared with TPS65270RGET and ISL85412IRZ-T7A, the LTC3417AEDHC-1#TRPBF offers superior flexibility in output voltage tuning, light-load efficiency optimization, and phase-controlled input current shaping - making it optimal for space-constrained, battery-sensitive dual-rail applications where programmability and thermal performance are critical.
Availability
LTC3417AEDHC-1#TRPBF is available at Aetrix Electronics and suitable for GPS navigation systems, automotive instrumentation, and industrial PC cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LTC3417AEDHC-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 aerospace, automotive, industrial, and communications markets.
The LTC3417A series belongs to Linear's precision monolithic DC/DC converter product line, designed specifically for medium-power, multi-rail embedded systems demanding high efficiency, small footprint, and robust power sequencing - especially in battery-operated and thermally constrained environments.
FAQ
What is the maximum supported switching frequency for the LTC3417AEDHC-1#TRPBF?
The LTC3417AEDHC-1#TRPBF supports a maximum switching frequency of 4MHz when configured with an external resistor on the FREQ pin. At this frequency, the device maintains stable regulation and high efficiency while enabling use of miniature inductors (≤2mm height) and low-ESR ceramic capacitors - critical for space-constrained portable designs.
Does the LTC3417AEDHC-1#TRPBF require external Schottky diodes?
No, the LTC3417AEDHC-1#TRPBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs with low RDS(ON) (0.088Ω/0.084Ω for CH1; 0.16Ω/0.15Ω for CH2), eliminating conduction losses and heat generation associated with external diodes - simplifying layout and improving overall efficiency.
How does the POR function behave when only one channel is enabled?
When only one channel is enabled (e.g., RUN1 = high, RUN2 = low), the POR pin of the LTC3417AEDHC-1#TRPBF reflects the regulation status of the active channel only. It asserts low if that channel's output falls >8% below target and de-asserts ~150ms after recovery to within –6% - ensuring reliable reset signaling even in asymmetric power configurations.
What thermal considerations apply to the exposed pad on the LTC3417AEDHC-1#TRPBF DFN package?
The exposed pad (Pin 17) of the LTC3417AEDHC-1#TRPBF is electrically and thermally connected to PGND2/GNDD and must be soldered to a PCB copper pour for effective heat dissipation. With θJA = 43°C/W, proper thermal vias and grounding ensure junction temperature remains within 125°C limit under full 1.5A/1A load at 85°C ambient.
Can the LTC3417AEDHC-1#TRPBF operate with different input voltages on VIN1 and VIN2?
Yes, the LTC3417AEDHC-1#TRPBF supports independent inputs: VIN1 powers CH1's P-MOSFET and VIN2 powers CH2's P-MOSFET plus analog circuitry. However, the absolute difference |VIN1 – VIN2| must not exceed 0.3V per Absolute Maximum Ratings, and both must stay within 2.25V–5.5V to ensure proper gate drive and regulation integrity.
LTC3417AEDHC-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3417AEDHC-1#TRPBF FAQ
1.How can I place an order for LTC3417AEDHC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AEDHC-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 LTC3417AEDHC-1#TRPBF reliable?
The price and inventory of LTC3417AEDHC-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 LTC3417AEDHC-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3417AEDHC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AEDHC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AEDHC-1#TRPBF?
LTC3417AEDHC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AEDHC-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 LTC3417AEDHC-1#TRPBF?
For technical support, including LTC3417AEDHC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AEDHC-1#TRPBF requirements.
6.How does Aetrix verify that LTC3417AEDHC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AEDHC-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 LTC3417AEDHC-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3417AEDHC-1#TRPBF?
All LTC3417AEDHC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AEDHC-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 LTC3417AEDHC-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3417AEDHC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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