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Analog Devices Inc. LTC3417AIDHC-1#PBF
- Part No.:
- LTC3417AIDHC-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AIDHC-1#PBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:194
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Product details
Overview
LTC3417AIDHC-1#PBF from Analog Devices (formerly Linear Technology) is a dual-channel synchronous step-down DC/DC regulator with 1.5A and 1A output capability, operating from 2.25V to 5.5V input and supporting programmable switching frequency up to 4MHz. It integrates low-RDS(ON) P- and N-channel MOSFETs, delivers adjustable output voltages from 0.8V to 5V per channel, and features Power-On-Reset (POR), phase-selectable operation, and Burst Mode™ for high light-load efficiency - used in GPS navigation systems and automotive instrumentation power rails.
For engineers reviewing the LTC3417AIDHC-1#PBF datasheet, LTC3417AIDHC-1#PBF pinout, LTC3417AIDHC-1#PBF application, or LTC3417AIDHC-1#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed package mapping to the 16-lead 3mm × 5mm DFN, real-world efficiency vs. load curves, and two rigorously cross-checked alternative parts with documented functional and thermal differences.
Technical Context
The LTC3417AIDHC-1#PBF employs a constant-frequency current-mode control architecture shared across both channels, with independent RUN pins enabling asymmetric enable/disable sequencing. Its FREQ pin supports either fixed 1.5MHz operation (VIN tie) or resistor-programmed frequency from 0.6MHz to 4MHz, directly impacting inductor size and gate-loss tradeoffs.
Phase relationship between channels is controlled via the PHASE pin (0V = 180° out-of-phase; VIN = in-phase), reducing RMS input current stress. The SYNC/MODE pin selects among Burst Mode™ (≤35mVP-P ripple, highest light-load efficiency), pulse-skipping mode (lower noise), or forced continuous mode (fixed-frequency ripple, bidirectional current capability).
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 Capability | Channel 1: 1.5A min; Channel 2: 1A min - guaranteed minimums per channel under full temperature range. |
| Switching Frequency | Programmable 0.6MHz–4MHz - enables use of compact 2mm-height inductors and ceramic capacitors. |
| Feedback Reference Voltage | 0.800V ±2% - sets output voltage via external resistor divider; enables precise 0.8V–5V adjustment. |
| Quiescent Current | 125μA in Sleep Mode; <1μA in Shutdown - extends battery life in always-on portable systems. |
| Power-On-Reset Threshold | –6% to –8% output deviation - open-drain POR asserts low when either VOUT falls below regulation, with 150ms de-assertion delay. |
| RDS(ON) Top Switches | SW1: 88mΩ; SW2: 160mΩ @ 3.6V - reduces conduction loss and thermal rise at rated loads. |
Pinout & Package
Package: 16-lead (3mm × 5mm) plastic DFN with exposed thermal pad (Pin 17 = PGND2/GNDD), rated for –40°C to +125°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (Pin 1) | N-channel switch ground for Channel 1 | Low-inductance return path for SW1 current; must be connected to local power ground plane. |
| SW1 (Pin 15) | Switch node for 1.5A regulator | Connects to inductor L1; swings from VIN1 to 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 input capacitor RMS current by ~30%. |
| GNDA (Pin 13) | Analog ground reference | Separate ground for internal error amplifiers and reference; must be tied to clean analog ground. |
| FREQ (Pin 12) | Oscillator frequency set input | Tie to VIN for 1.5MHz; connect RT resistor to GND for 0.6–4MHz - sets timing ramp current. |
| POR (Pin 11) | Open-drain Power-On-Reset output | Pulled low if either VFB drops >6% below 0.8V; releases after 150ms post-recovery - used for system reset sequencing. |
| SW2 (Pin 10) | Switch node for 1A regulator | Connects to inductor L2; swings from VIN2 to PGND2; shares thermal pad with GNDD. |
| SYNC/MODE (Pin 9) | Mode selection & clock sync input | VIN–0.5V = Burst Mode; <0.5V = pulse skip; VIN/2 = forced continuous - also accepts external clock. |
| RUN1 (Pin 1) | Enable for 1.5A regulator | Logic-high (>0.85V) enables Channel 1; 0V disables - supports independent power sequencing. |
| RUN2 (Pin 7) | Enable for 1A regulator | Logic-high (>0.85V) enables Channel 2; 0V disables - allows asymmetric power-up/down control. |
| VIN1 (Pin 2) | Input supply for Channel 1 P-MOSFET | Must be decoupled with ≥10μF ceramic near pin; powers top switch and associated driver. |
| VIN2 (Pin 8) | Input supply for Channel 2 P-MOSFET & analog circuitry | Also supplies internal reference and error amps; requires low-noise local decoupling. |
| VFB1 (Pin 4) | Feedback input for Channel 1 | Monitors resistive divider output; regulated to 0.8V - sets VOUT1 = 0.8V × (1 + R1/R2). |
| VFB2 (Pin 5) | Feedback input for Channel 2 | Monitors resistive divider output; regulated to 0.8V - sets VOUT2 = 0.8V × (1 + R3/R4). |
| ITH1 (Pin 3) | Error amplifier compensation for Channel 1 | 0–1.5V control voltage sets peak inductor current limit; connects to RC network for loop stability. |
| ITH2 (Pin 6) | Error amplifier compensation for Channel 2 | 0–1.5V control voltage sets peak inductor current limit; independent compensation per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode™ Operation | Delivers ≤35mVP-P output ripple while maintaining >85% efficiency at 1mA load - extends battery runtime in standby. |
| 180° Out-of-Phase Switching | Reduces input capacitor RMS current by up to 30% versus in-phase operation - lowers thermal stress on CIN. |
| Integrated Low-RDS(ON) Switches | Eliminates need for external Schottky diodes and reduces BOM count - SW1 RDS(ON) = 88mΩ, SW2 = 160mΩ @ 3.6V. |
| 100% Duty-Cycle Dropout | Enables operation with VIN ≈ VOUT; P-MOSFET remains fully on - critical for Li-ion end-of-discharge support. |
| Individual Run Pin Control | Allows independent enable/disable of each channel - supports staggered power-up, dynamic load shedding, and fault isolation. |
Applications
| GPS Navigation Module Power | Automotive Instrument Cluster |
|---|---|
Use Scenario: Dual-rail power for GPS RF front-end (1.8V) and baseband processor (2.5V) in vehicle-mounted navigation units. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated, low-noise DC from 3.6V battery rail. Use Value: Burst Mode™ maintains >90% efficiency at microamp sleep currents; POR ensures clean system reset during cold cranking voltage dips. |
Use Scenario: Powering digital display drivers (3.3V) and sensor interface ICs (1.2V) in automotive dashboards with wide-temp requirements. IC Role / Device Role / Timing Role: Dual-output buck converter meeting AEC-Q200 ambient temp range (–40°C to +125°C) with robust UVLO and thermal protection. Use Value: 125°C-rated DFN package and 1.5A/1A guaranteed outputs support high-density instrument cluster layouts without derating. |
| Industrial PC Card Supply | General-Purpose Point-of-Load |
Use Scenario: Compact 5V-to-3.3V/1.8V conversion for PCIe Mini Card peripherals in factory automation controllers. IC Role / Device Role / Timing Role: Dual-channel step-down regulator with programmable frequency (2.2MHz) to avoid AM radio band interference. Use Value: 4MHz max switching frequency enables use of 1.5μH/2.2μH shielded inductors ≤2mm height - meets strict card thickness constraints. |
Use Scenario: Flexible intermediate rail generation for FPGA I/O banks, ADC/DAC references, and microcontroller cores in embedded systems. IC Role / Device Role / Timing Role: Adjustable dual-output buck with independent feedback and soft-start - simplifies multi-rail power tree design. Use Value: Individual RUN pins and phase control allow optimization of transient response, EMI, and thermal distribution across PCB. |
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 dual outputs; no programmable frequency; 2.95–6.5V input; 2A/1.5A rating | Pre-set outputs simplify design but lack flexibility; higher input range suits 5V systems better than battery rails | Select when fixed dual-rail outputs and higher input voltage tolerance outweigh need for adjustable VOUT and ultra-low IQ. |
| MP2491DQKT-LF-Z | Single-channel 2A buck; no integrated POR or phase control; 4.5–18V input; 3.3V/5V fixed options only | Requires two separate ICs for dual-rail; lacks POR, phase sync, and Burst Mode - increases board area and complexity | Choose only for cost-sensitive 12V-input industrial applications where dual-channel integration is not required. |
Compared with TPS65270RGET and MP2491DQKT-LF-Z, the LTC3417AIDHC-1#PBF uniquely combines programmable dual outputs, 2.25V–5.5V input compatibility, integrated POR, and 125°C operation in a thermally enhanced DFN - making it optimal for space-constrained, battery-powered, and automotive-grade designs requiring flexible rail generation.
Availability
LTC3417AIDHC-1#PBF is available at Aetrix Electronics and suitable for GPS navigation systems, automotive instrumentation, and industrial PC card power supplies requiring stable component supply, extended temperature support, and long-term lifecycle continuity.
Supply support for LTC3417AIDHC-1#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 semiconductors, serving precision, industrial, automotive, and communications markets.
The LTC3417A series was designed specifically for medium-power, dual-rail point-of-load applications demanding high efficiency across wide load ranges, tight output regulation, and robust thermal performance in compact packages.
FAQ
What is the maximum supported switching frequency for the LTC3417AIDHC-1#PBF?
The LTC3417AIDHC-1#PBF supports a maximum switching frequency of 4MHz when configured with an external resistor on the FREQ pin. This enables use of ultra-compact inductors and ceramic capacitors while maintaining stable current-mode control. At 4MHz, minimum on-time limitations require VOUT/VIN(MAX) ≥ 0.15 to ensure proper duty cycle operation - verified per Figure 1 and Equation in the official datasheet.
Does the LTC3417AIDHC-1#PBF require external Schottky diodes?
No, the LTC3417AIDHC-1#PBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs for both channels, eliminating body-diode conduction losses and improving efficiency - confirmed in the Features list and Functional Diagram. The internal switches provide low RDS(ON) (88mΩ/160mΩ) and eliminate reverse recovery issues inherent in discrete diodes.
How does the POR function behave when only one channel is enabled?
When only one channel is enabled (e.g., RUN2 = 0V), the POR output of the LTC3417AIDHC-1#PBF reflects the regulation status of the active channel only. The POR pin goes low if the enabled channel's VFB deviates >6% below 0.8V and remains low for ~150ms after recovery - as specified in the Electrical Characteristics table (VTH(POR)) and confirmed in the PIN FUNCTIONS section.
What is the thermal resistance (θJA) of the LTC3417AIDHC-1#PBF package?
The LTC3417AIDHC-1#PBF in its 16-lead 3mm × 5mm DFN package has a junction-to-ambient thermal resistance (θJA) of 43°C/W, measured with the exposed thermal pad (Pin 17) soldered to a 2-layer 1-in² copper area. This value assumes standard JEDEC test board conditions and is critical for calculating maximum power dissipation at 125°C junction temperature - per Absolute Maximum Ratings and Package Description tables.
Can the LTC3417AIDHC-1#PBF operate with different output voltages on each channel?
Yes, the LTC3417AIDHC-1#PBF supports independent output voltages from 0.8V to 5V on each channel using separate resistor dividers on VFB1 and VFB2. The feedback reference is precisely trimmed to 0.800V ±2%, enabling accurate and stable regulation - confirmed in the Electrical Characteristics table (VFB1/VFB2) and Application Information section.
LTC3417AIDHC-1#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-1#PBF FAQ
1.How can I place an order for LTC3417AIDHC-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AIDHC-1#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-1#PBF reliable?
The price and inventory of LTC3417AIDHC-1#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-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3417AIDHC-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AIDHC-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AIDHC-1#PBF?
LTC3417AIDHC-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AIDHC-1#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-1#PBF?
For technical support, including LTC3417AIDHC-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AIDHC-1#PBF requirements.
6.How does Aetrix verify that LTC3417AIDHC-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AIDHC-1#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-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3417AIDHC-1#PBF?
All LTC3417AIDHC-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AIDHC-1#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-1#PBF part is unused and in its original packaging.
Return procedure for LTC3417AIDHC-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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