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Analog Devices Inc. LTC3417AIDHC-2#PBF
- Part No.:
- LTC3417AIDHC-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AIDHC-2#PBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:266
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Product details
Overview
LTC3417AIDHC-2#PBF from Analog Devices (formerly Linear Technology) is a dual synchronous step-down DC/DC regulator with 1.5A and 1A output channels, operating from 2.25V to 5.5V input and delivering adjustable outputs from 0.8V to 5V. It features programmable switching frequency up to 4MHz, internal low-RDS(ON) MOSFETs, and Burst Mode™ operation for high light-load efficiency in space-constrained portable power systems.
For engineers reviewing the LTC3417AIDHC-2#PBF datasheet, LTC3417AIDHC-2#PBF pinout, LTC3417AIDHC-2#PBF application, or LTC3417AIDHC-2#PBF equivalent, key selection criteria include its dual-channel phase control, 100μA quiescent current in dropout, 16-pin 3mm × 5mm DFN package with exposed thermal pad, and support for external clock synchronization - all critical for battery-powered instrumentation and multi-rail point-of-load designs.
Technical Context
The LTC3417AIDHC-2#PBF employs a constant-frequency current-mode architecture shared across both channels, with independent RUN pins enabling asymmetric channel enablement and soft-start sequencing. Its PHASE pin selects in-phase or 180° out-of-phase operation to reduce input RMS current stress on the VIN capacitor.
Mode selection via SYNC/MODE pin supports three distinct low-load behaviors: Burst Mode™ (≤125μA IQ, <35mVP-P ripple), Pulse Skip (low-noise, fixed-frequency), and Forced Continuous (constant ripple, bidirectional current capability). The FREQ pin enables resistor-programmable operation from 0.6MHz to 4MHz or fixed 1.5MHz when tied to VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V system rails without pre-regulation. |
| Output Current (Ch1 / Ch2) | 1.5A / 1A guaranteed minimum - enables simultaneous powering of core logic and I/O rails in compact embedded systems. |
| Switching Frequency | Programmable 0.6MHz–4MHz - allows optimization of inductor size (≤2mm height) and EMI filtering requirements. |
| Feedback Reference Voltage | 0.8V ±2% - sets precise output regulation with standard resistor dividers; enables 0.8V–5V adjustable outputs. |
| Quiescent Current (Active) | 400–600μA - minimizes standby power loss in always-on subsystems like GPS receivers and automotive sensors. |
| Shutdown Current | <1μA - extends battery life during deep sleep modes in portable navigation and telemetry devices. |
| Peak Switch RDS(ON) (Ch1/Ch2) | 0.088Ω / 0.16Ω at 3.6V - reduces conduction losses and thermal rise in thermally constrained DFN packages. |
Pinout & Package
Package: 16-lead (3mm × 5mm) plastic DFN with exposed thermal pad (Pin 17 = PGND2/GNDD), rated for –40°C to +125°C operation and θJA = 43°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (16) | N-channel driver ground for Ch1 | Provides low-impedance return path for SW1 current; must be connected to local power ground plane. |
| SW1 (15) | Ch1 switch node | Connects to inductor L1; swings between VIN1 and PGND1; requires tight layout to minimize EMI and voltage spikes. |
| PHASE (14) | Channel phase relationship control | Logic-high = in-phase; logic-low = 180° out-of-phase; prevents floating to avoid undefined timing behavior. |
| GNDA (13) | Analog ground reference | Isolates sensitive analog circuitry (error amplifiers, reference) from noisy digital/switching grounds. |
| FREQ (12) | Oscillator frequency set input | Tie to VIN for 1.5MHz; connect RT resistor to GND for 0.6–4MHz tuning - directly controls inductor/capacitor sizing. |
| PGOOD (11) | Power-good open-drain output | Asserts low when either VOUT deviates >±6% from target - used for system power sequencing and fault monitoring. |
| SW2 (10) | Ch2 switch node | Connects to inductor L2; swings between VIN2 and PGND2; shares same layout constraints as SW1. |
| SYNC/MODE (9) | Mode selection & clock sync input | Voltage threshold determines Burst/Pulse Skip/Forced Continuous mode; also accepts external clock for synchronization. |
| RUN1 (1) | Ch1 enable control | Logic-high enables 1.5A regulator; logic-low disables it; both RUN1/RUN2 = 0V places device in shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel phase control | PHASE pin enables 0° or 180° channel alignment - reduces input capacitor RMS current by up to 30% in out-of-phase mode. |
| Burst Mode™ operation | Delivers ≥95% efficiency at 1mA load with <35mVP-P output ripple - extends runtime in GPS and sensor nodes without compromising noise performance. |
| Internal synchronous MOSFETs | Eliminates need for external Schottky diodes - simplifies BOM, improves thermal performance, and enables 100% duty-cycle dropout operation. |
| Individual RUN pin control | Allows independent startup/shutdown sequencing of 1.5A and 1A rails - supports safe power-up of FPGA I/O banks before core voltage. |
| Low dropout operation | Maintains regulation down to VIN – VOUT ≈ 100mV at full load - critical for maintaining stable 1.8V/2.5V rails near end-of-battery discharge. |
Applications
| GPS/Navigation Systems | Automotive Instrumentation |
|---|---|
Use Scenario: Powering GNSS baseband processor, RF front-end, and display backlight from single Li-ion cell. IC Role / Device Role / Timing Role: Dual-output buck regulator supplying 1.8V core and 2.5V I/O rails with synchronized switching to suppress conducted EMI into RF bands. Use Value: Burst Mode™ extends battery life beyond 24 hours while maintaining fast transient response to GPS signal acquisition bursts. |
Use Scenario: Supplying microcontroller, CAN transceiver, and analog sensor interface in dashboard cluster under wide temperature (-40°C to +125°C). IC Role / Device Role / Timing Role: High-reliability dual buck converter delivering regulated 3.3V and 5V rails with PGOOD monitoring for fail-safe system reset. Use Value: 125°C-rated DFN package and robust UVLO (2.07V) ensure continuous operation during cold-cranking and load-dump events. |
| PC Cards | Industrial Point-of-Load |
Use Scenario: Compact power solution for PCIe Mini Card with FPGA, DDR memory, and USB PHY requiring isolated 1.2V, 1.8V, and 3.3V rails. IC Role / Device Role / Timing Role: Dual-channel regulator with independent RUN control enables staggered rail bring-up per PCMCIA specification. Use Value: 4MHz max switching frequency allows use of 1.5μH/2.2μH inductors ≤2mm height - meets strict card thickness constraints. |
Use Scenario: Distributed power delivery in programmable logic controller (PLC) I/O modules with multiple isolated sensor interfaces. IC Role / Device Role / Timing Role: Dual buck converter providing 3.3V logic and 5V analog rails with out-of-phase switching to minimize input capacitance requirements. Use Value: 16-pin DFN package with exposed pad ensures thermal stability under continuous 1.5A/1A loads in sealed industrial enclosures. |
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 IQ (250μA active) | Lacks adjustable VOUT and phase control - suitable only for fixed-rail applications without dynamic voltage scaling. | Select when BOM simplicity and AEC-Q100 qualification are prioritized over flexibility. |
| MAX20075ATPA/VY+ | Integrated FETs rated 2.5A/1.5A; supports 3.5V–36V input; includes spread-spectrum modulation | Designed for automotive 12V systems - overqualified for 5V-input portable applications; larger TQFN package. | Choose for harsh-environment automotive designs requiring extended input range and EMI reduction. |
Compared with TPS65270RGET and MAX20075ATPA/VY+, the LTC3417AIDHC-2#PBF offers superior design flexibility through fully adjustable outputs, resistor-programmable frequency, and precise phase control - making it optimal for space- and efficiency-critical portable electronics where rail customization and thermal management are paramount.
Availability
LTC3417AIDHC-2#PBF 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-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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving precision instrumentation, communications, and industrial markets.
The LTC3417A series was designed specifically for medium-power dual-rail point-of-load conversion in portable and automotive electronics, emphasizing ultra-low quiescent current, thermal efficiency in small packages, and flexible mode control for dynamic power management.
FAQ
What is the maximum operating junction temperature for the LTC3417AIDHC-2#PBF?
The LTC3417AIDHC-2#PBF has a maximum junction temperature (TJMAX) of 125°C, as specified in its Absolute Maximum Ratings table. This rating applies to the –40°C to +125°C ambient temperature grade (indicated by the 'I' suffix), and thermal design must ensure TJ does not exceed this limit under worst-case power dissipation and PCB layout conditions.
Does the LTC3417AIDHC-2#PBF support external clock synchronization?
Yes, the LTC3417AIDHC-2#PBF supports external clock synchronization via the SYNC/MODE pin. When an external clock signal is applied to this pin, the internal oscillator locks to it, enabling deterministic switching timing across multiple converters - a key requirement for EMI-sensitive applications such as automotive infotainment and medical imaging subsystems.
How does the PHASE pin affect input capacitor stress in the LTC3417AIDHC-2#PBF?
The PHASE pin in the LTC3417AIDHC-2#PBF selects whether the two channels operate in-phase or 180° out-of-phase. In out-of-phase mode, input current ripple cancels partially, reducing RMS current on the VIN capacitor by up to 30% compared to in-phase operation - directly lowering required capacitance and improving reliability in high-density layouts.
What is the feedback reference voltage accuracy of the LTC3417AIDHC-2#PBF?
The LTC3417AIDHC-2#PBF features a precision 0.8V feedback reference voltage with ±2% tolerance over temperature and line conditions, as specified in its Electrical Characteristics table (VFB1/VFB2 = 0.784V to 0.816V). This accuracy enables stable output regulation across its full 0.8V–5V adjustment range without trimming.
Can the LTC3417AIDHC-2#PBF operate with only one channel enabled?
Yes, the LTC3417AIDHC-2#PBF supports independent channel operation via separate RUN1 and RUN2 pins. Either channel can be disabled while the other remains active - for example, RUN1 = high and RUN2 = low enables only the 1.5A regulator, drawing just 260–400μA quiescent current, ideal for partial-system wake-up scenarios.
LTC3417AIDHC-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-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):
- 2.25V
- 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-2#PBF FAQ
1.How can I place an order for LTC3417AIDHC-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AIDHC-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 LTC3417AIDHC-2#PBF reliable?
The price and inventory of LTC3417AIDHC-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 LTC3417AIDHC-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC3417AIDHC-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AIDHC-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AIDHC-2#PBF?
LTC3417AIDHC-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AIDHC-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 LTC3417AIDHC-2#PBF?
For technical support, including LTC3417AIDHC-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AIDHC-2#PBF requirements.
6.How does Aetrix verify that LTC3417AIDHC-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AIDHC-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 LTC3417AIDHC-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC3417AIDHC-2#PBF?
All LTC3417AIDHC-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AIDHC-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 LTC3417AIDHC-2#PBF part is unused and in its original packaging.
Return procedure for LTC3417AIDHC-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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