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Analog Devices Inc. LTC3417AEDHC-1#PBF
- Part No.:
- LTC3417AEDHC-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AEDHC-1#PBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,761
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Product details
Overview
LTC3417AEDHC-1#PBF from Analog Devices (formerly Linear Technology) is a dual synchronous step-down DC/DC regulator delivering 1.5A on Channel 1 and 1A on Channel 2, operating from 2.25V to 5.5V input with programmable switching frequency up to 4MHz. It integrates low-RDS(ON) P-channel and N-channel MOSFETs, supports Burst Mode™ for >95% efficiency at light loads, and features independent RUN pins, phase-selectable operation, and open-drain POR output. It targets compact, medium-power point-of-load applications such as GPS modules and automotive instrumentation.
For engineers reviewing the LTC3417AEDHC-1#PBF datasheet, LTC3417AEDHC-1#PBF pinout, LTC3417AEDHC-1#PBF application, or LTC3417AEDHC-1#PBF equivalent, key selection criteria include guaranteed 1.5A/1A output current capability, 0.8V feedback reference with ±2% tolerance, 100μA quiescent current in dropout, 150ms POR de-assertion delay, and DFN-16 (3mm × 5mm) thermal performance (θJA = 43°C/W).
Technical Context
The LTC3417AEDHC-1#PBF employs a constant-frequency current-mode architecture with shared oscillator and independent error amplifiers per channel. Its dual-regulator design supports in-phase or 180° out-of-phase switching via the PHASE pin-reducing RMS input current stress when out-of-phase. The FREQ pin enables fixed 1.5MHz operation or resistor-programmable frequency from 0.6MHz to 4MHz.
Mode selection is unified across both channels via the SYNC/MODE pin: high logic selects Burst Mode™ (low IQ, <35mVP-P ripple), low logic enables pulse-skipping mode (low-noise), and mid-level voltage forces continuous conduction. Each channel includes dedicated RUN, VFB, ITH, and SW pins, enabling independent enable/disable, output voltage setting (0.8V to 5V), loop compensation, and inductor connection.
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 | 1.5A (CH1), 1A (CH2) - guaranteed minimum per channel with internal MOSFETs; no external diodes needed |
| Feedback Voltage | 0.8V ±2% - sets output via resistive divider; enables precise 1.8V, 2.5V, 3.3V, or custom regulation |
| Switching Frequency | Up to 4MHz - allows use of sub-2mm-height inductors and ceramic capacitors for ultra-compact layouts |
| Quiescent Current | 100μA in dropout - maintains regulation with minimal battery drain during low-VIN conditions |
| POR Threshold | –6% to –8% VFB deviation - asserts open-drain reset when either output falls out of regulation |
| Shutdown Current | <1μA - enables deep sleep in battery-powered systems with zero-load standby |
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 (LTC3417AE grade). Thermal resistance θJA = 43°C/W with proper PCB copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (Pin 16) | N-channel switch return for CH1 | Low-inductance ground path for 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 short, low-loop-area routing |
| PHASE (Pin 14) | Channel phase relationship control | Logic-high = in-phase; logic-low = 180° out-of-phase; prevents floating to avoid undefined behavior |
| GNDA (Pin 13) | Analog ground reference | Separate AGND return for VFB/ITH/oscillator circuitry; ties 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 inductor/capacitor sizing tradeoff |
| POR (Pin 11) | Power-on-reset open-drain output | Pulled low when either VOUT drops ≥6% below target; releases after ~150ms post-recovery |
| SW2 (Pin 10) | CH2 switch node | Connects to inductor L2; swings between VIN2 and PGND2; shares thermal pad with GNDD |
| SYNC/MODE (Pin 9) | Mode selection & clock sync input | Controls Burst/Pulse-Skip/Forced-Continuous mode; accepts external clock for synchronization |
| RUN1 (Pin 1) | CH1 enable input | Logic-high ≥0.85V enables CH1; 0V disables CH1; both RUN1/RUN2 = 0V → shutdown |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables separate 1.5A and 1A outputs with individual RUN, VFB, and ITH pins - supports asymmetric rail generation |
| Burst Mode™ operation | Reduces quiescent current to 125μA in sleep mode while maintaining <35mVP-P output ripple - extends battery life in intermittent-load systems |
| 180° out-of-phase switching | Lowers RMS input current by ~30% versus in-phase operation - reduces input capacitor stress and EMI |
| Integrated MOSFETs with low RDS(ON) | 0.088Ω (CH1 top), 0.16Ω (CH2 top) at 3.6V - eliminates Schottky diodes and associated losses |
| Programmable soft-start | 1024-cycle digital ramp on RUN assertion - prevents inrush current and output overshoot during power-up |
Applications
| GPS/Navigation Systems | Automotive Instrumentation |
|---|---|
Use Scenario: Powering RF front-end, baseband processor, and display backlight in portable GPS units with Li-ion battery input. IC Role / Device Role / Timing Role: Dual-output DC/DC regulator supplying 1.8V @ 1.5A to processor core and 2.5V @ 1A to RF transceiver. Use Value: Burst Mode™ extends runtime between charges; 4MHz operation enables 1.5μH/2.2μH shielded inductors under 2mm height for thin form factor. | Use Scenario: Generating stable 3.3V and 5V rails for digital cluster microcontrollers and analog sensor interfaces in vehicle dashboards. IC Role / Device Role / Timing Role: Synchronous buck converter providing isolated, low-noise power domains with independent enable control. Use Value: 100μA dropout quiescent current preserves battery during ignition-off; POR pin directly resets MCU upon undervoltage event. |
| PC Cards | Industrial Point-of-Load |
Use Scenario: Compact power solution for PCIe Mini Card peripherals requiring dual regulated voltages within strict height constraints. IC Role / Device Role / Timing Role: Dual-channel step-down regulator delivering 1.2V @ 1.5A and 3.3V @ 1A from 3.3V or 5V host supply. Use Value: DFN-16 package (3mm × 5mm × 0.75mm) fits card-edge space; 1.5MHz fixed frequency simplifies EMI filtering. | Use Scenario: Local regulation for FPGA I/O banks and ADC reference supplies in programmable logic controllers with wide input range. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC/DC converter supporting 2.25–5.5V input and multiple output configurations. Use Value: 43°C/W θJA with exposed pad ensures reliable operation at 85°C ambient; phase control minimizes input capacitor heating. |
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 1.2MHz frequency; 2A/1.5A output; no Burst Mode™; integrated LDO for bias rail | Higher current, no light-load efficiency optimization; requires external LDO for auxiliary bias | Select when higher output current and integrated bias LDO outweigh need for ultra-low IQ in battery apps |
| ISL85412FRTZ-T7A | 2.5A/1.5A output; 300kHz–2.2MHz programmable frequency; no POR pin; 125°C junction rating | Higher current, wider temp range, but lacks power-good signaling and phase control | Select for industrial/high-temp environments where POR and phase flexibility are non-critical |
Compared with TPS65270RGET and ISL85412FRTZ-T7A, the LTC3417AEDHC-1#PBF uniquely combines dual-channel programmable frequency (up to 4MHz), integrated POR, 180° phase control, and Burst Mode™ for sub-100μA light-load operation - making it optimal for space-constrained, battery-sensitive designs requiring precise rail sequencing and low-noise operation.
Availability
LTC3417AEDHC-1#PBF is available at Aetrix Electronics and suitable for GPS navigation systems, automotive instrumentation, and industrial point-of-load applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for LTC3417AEDHC-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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC3417A series belongs to ADI's precision power conversion portfolio, designed specifically for compact, high-efficiency dual-output DC/DC regulation in battery-powered and space-constrained embedded systems.
FAQ
What is the maximum supported switching frequency for the LTC3417AEDHC-1#PBF?
The LTC3417AEDHC-1#PBF supports a maximum switching frequency of 4MHz when configured with an external resistor from the FREQ pin to ground. At this frequency, the device enables use of miniature inductors (e.g., 1.5μH) under 2mm height and low-ESR ceramic capacitors, critical for ultra-thin portable designs. Operation above 4MHz is not specified or guaranteed.
Does the LTC3417AEDHC-1#PBF require external Schottky diodes?
No, the LTC3417AEDHC-1#PBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs for both channels, eliminating conduction losses and thermal overhead associated with external diodes. This integration contributes directly to its up-to-95% peak efficiency and simplified bill-of-materials.
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 monitors only the active regulator's output. It asserts low if that channel's VFB deviates by ≥6% from 0.8V and de-asserts ~150ms after regulation is restored. The disabled channel's output is ignored - ensuring accurate reset signaling even in asymmetric enable configurations.
Can the two channels of the LTC3417AEDHC-1#PBF operate at different output voltages?
Yes, the LTC3417AEDHC-1#PBF supports independent output voltages from 0.8V to 5V per channel using separate resistive feedback dividers on VFB1 and VFB2. For example, Channel 1 can be set to 1.8V for a processor core while Channel 2 delivers 2.5V to an RF IC - all with full regulation, current limiting, and mode control retained per channel.
What is the thermal performance of the LTC3417AEDHC-1#PBF in its DFN package?
The LTC3417AEDHC-1#PBF in the 16-lead DFN package (3mm × 5mm) has a junction-to-ambient thermal resistance (θJA) of 43°C/W when mounted on a standard 2-layer PCB with 2 in² of 2-oz copper connected to the exposed thermal pad (Pin 17). This enables reliable operation up to 85°C ambient at full load with appropriate layout - verified per JEDEC JESD51-7 standards.
LTC3417AEDHC-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3417AEDHC-1#PBF FAQ
1.How can I place an order for LTC3417AEDHC-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AEDHC-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 LTC3417AEDHC-1#PBF reliable?
The price and inventory of LTC3417AEDHC-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 LTC3417AEDHC-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3417AEDHC-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AEDHC-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AEDHC-1#PBF?
LTC3417AEDHC-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AEDHC-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 LTC3417AEDHC-1#PBF?
For technical support, including LTC3417AEDHC-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AEDHC-1#PBF requirements.
6.How does Aetrix verify that LTC3417AEDHC-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AEDHC-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 LTC3417AEDHC-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3417AEDHC-1#PBF?
All LTC3417AEDHC-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AEDHC-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 LTC3417AEDHC-1#PBF part is unused and in its original packaging.
Return procedure for LTC3417AEDHC-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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