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Analog Devices Inc. LTC3417EDHC#PBF
- Part No.:
- LTC3417EDHC#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417EDHC#PBF.pdf
- Description:
- IC REG BUCK ADJ DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:319
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Product details
Overview
LTC3417EDHC#PBF from Analog Devices (formerly Linear Technology) is a dual-channel synchronous step-down DC/DC regulator with independent 1.4A and 800mA outputs, operating from 2.25V to 5.5V input. It delivers adjustable output voltages from 0.8V to 5V per channel, supports programmable switching frequency up to 4MHz, and integrates low-RDS(ON) P- and N-channel MOSFETs to achieve up to 95% efficiency without external Schottky diodes - used in portable digital cameras and cellular phone power rails.
For engineers reviewing the LTC3417EDHC#PBF datasheet, LTC3417EDHC#PBF pinout, LTC3417EDHC#PBF application, or LTC3417EDHC#PBF equivalent, key selection considerations include dual-output current capability, phase-selectable operation, Burst Mode® vs Pulse Skip mode trade-offs, and DFN-16 thermal performance at 43°C/W θJA.
Technical Context
The LTC3417EDHC#PBF employs a constant-frequency current-mode control architecture shared across both channels, with user-selectable 180° out-of-phase operation via the PHASE pin to reduce RMS input current and relax input capacitor derating. Its MODE pin configures three light-load behaviors: Burst Mode® (maximizing efficiency), Pulse Skip (minimizing ripple), or forced continuous conduction (for predictable EMI filtering).
Each channel features independent RUN enable inputs, soft-start via ITH ramping over 1024 clock cycles, and internal 0.8V feedback reference with ±2% tolerance. Dropout operation maintains regulation down to 100% duty cycle, while undervoltage lockout activates below 2.07V to prevent unstable startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V system rails without pre-regulation. |
| Output Current | Channel 1: 1.4A min; Channel 2: 800mA min - enables simultaneous powering of core logic and I/O peripherals. |
| Switching Frequency | Programmable 0.6MHz–4MHz via FREQ pin resistor - allows optimization of inductor size vs. efficiency for compact PCB layouts. |
| Feedback Voltage | 0.8V ±2% - sets output voltage via external resistive divider; enables precise regulation across load and temperature. |
| Quiescent Current | 125μA in Sleep Mode - extends battery runtime in always-on subsystems like modem standby or sensor wake-up circuits. |
| Shutdown Current | <1μA - ensures negligible drain during full system sleep, critical for long-term portable device storage. |
| RDS(ON) Top Switch | 0.088Ω (CH1), 0.16Ω (CH2) at 3.6V - reduces conduction loss and thermal rise in high-current paths. |
Pinout & Package
The LTC3417EDHC#PBF is housed in a thermally enhanced 16-lead (3mm × 3mm) plastic DFN package with exposed pad (Pin 17) soldered to PGND2/GNDD for optimal thermal dissipation (θJA = 43°C/W). The package supports reflow-compatible lead-free finish and operates from –40°C to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (Pin 16) | N-channel driver ground for CH1 | Provides dedicated low-impedance return path for SW1 switching current; 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 and voltage spikes. |
| PHASE (Pin 14) | Channel phase relationship control | Logic-high selects in-phase operation; logic-low selects 180° out-of-phase - directly impacts input capacitor RMS current rating. |
| GNDA (Pin 13) | Analog ground reference | Isolates sensitive analog circuitry (error amps, references) from noisy digital/switching grounds to preserve regulation accuracy. |
| FREQ (Pin 12) | Oscillator frequency set input | Connected to VIN for 1.5MHz fixed operation; resistor-to-ground enables 0.6–4MHz tuning - determines minimum inductor size. |
| PGOOD (Pin 11) | Power-good open-drain output | Pulled low when either VOUT deviates >6% from target - used for system power sequencing and fault monitoring. |
| SW2 (Pin 10) | CH2 switch node | Connects to inductor L2; swings between VIN2 and PGND2 - shares same layout constraints as SW1. |
| PGND2/GNDD (Pins 1,10,11,17) | N-channel driver & digital ground | Exposed pad (Pin 17) must be soldered to PCB ground plane to meet thermal and electrical specs - not optional. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable (RUN1/RUN2) | Enables selective channel shutdown - allows dynamic power partitioning (e.g., keep RF section active while suspending display rail). |
| Burst Mode® operation | Reduces light-load quiescent current to 125μA while maintaining regulation - ideal for battery-backed real-time clocks or sensor nodes. |
| 180° out-of-phase switching | Cuts input capacitor RMS current by ~30% vs. in-phase - permits smaller, lower-cost input bulk capacitors in space-constrained designs. |
| Internal soft-start (1024-cycle ramp) | Prevents inrush current and output overshoot during power-up - eliminates need for external timing components or sequencing controllers. |
| Dropout operation (100% duty cycle) | Maintains regulated output down to VIN ≈ VOUT + RDS(ON)·ILOAD - extends usable battery voltage range in single-cell systems. |
Applications
| Mobile Camera Power Management | Cellular Baseband Core Supply |
|---|---|
Use Scenario: Dual-rail power delivery for CMOS image sensor (1.8V/1.4A) and ISP (2.5V/800mA) in smartphone rear camera modules. IC Role / Device Role / Timing Role: Primary dual-output buck regulator managing independent voltage domains with synchronized start-up and fault reporting. Use Value: Eliminates discrete regulators and external diodes, reducing BOM count by 4+ components while achieving >92% efficiency at 3.6V input. | Use Scenario: Powering ARM-based baseband processor cores (1.2V/1.4A) and memory interfaces (1.8V/800mA) in 4G LTE handsets. IC Role / Device Role / Timing Role: High-efficiency dual-buck controller with phase control to minimize input ripple affecting RF front-end sensitivity. Use Value: Out-of-phase operation lowers input capacitor RMS current by 28%, enabling use of single 10μF X5R ceramic instead of two 4.7μF units. |
| Digital Still Camera System Rail | Wireless Modem I/O & RF Supply |
Use Scenario: Generating 3.3V/1.4A for LCD backlight driver and 1.2V/800mA for image processing ASIC in compact digital cameras. IC Role / Device Role / Timing Role: Dual-channel DC/DC converter with independent RUN pins enabling staggered power-up of subsystems to limit peak inrush. Use Value: Burst Mode® extends alkaline AA battery life by 3.2× vs. forced continuous mode under 10mA load conditions. | Use Scenario: Supplying 2.8V/800mA to Wi-Fi/BT radio and 1.8V/1.4A to modem baseband in DSL/wireless CPE devices. IC Role / Device Role / Timing Role: Dual-output regulator with PGOOD monitoring for coordinated reset assertion across RF and digital sections. Use Value: Integrated power-good detection replaces external supervisor IC, reducing solution footprint by 25% and simplifying firmware boot sequence. |
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/1.8V outputs; no programmable frequency; higher 2.95–6.5V VIN range | Suitable for fixed-voltage industrial SoC supplies but lacks adjustable outputs for custom rail generation | Select when board space allows TSSOP-24 and fixed dual-rail outputs meet system requirements. |
| MP2143DQ-LF-Z | Single 3A output only; no second channel; 2.5–5.5V VIN; 1.5MHz fixed frequency | Requires two separate ICs to replicate dual-rail functionality - increases layout area and component count | Choose only if design requires higher single-channel current and can accommodate duplicated circuitry. |
Compared with TPS65270RGET and MP2143DQ-LF-Z, the LTC3417EDHC#PBF uniquely provides independently adjustable dual outputs, programmable frequency, and phase control in a 3mm × 3mm DFN - making it optimal for compact, battery-powered devices requiring flexible rail configuration.
Availability
LTC3417EDHC#PBF is available at Aetrix Electronics and suitable for mobile camera power management, cellular baseband core supply, digital still camera system rail, and wireless modem I/O & RF supply requiring stable component supply across production lifecycles.
Supply support for LTC3417EDHC#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 and maintains its legacy of high-performance power management ICs with rigorous automotive-grade qualification and reliability testing.
The LTC3417EDHC#PBF belongs to Linear's precision dual-output DC/DC regulator product line, designed specifically for space-constrained portable electronics needing efficient, flexible, and low-noise multi-rail power conversion.
FAQ
What is the maximum supported switching frequency for LTC3417EDHC#PBF?
The LTC3417EDHC#PBF supports a maximum switching frequency of 4MHz when configured with an external resistor on the FREQ pin. At this frequency, inductor and capacitor sizes are minimized - enabling ultra-compact designs such as slim smartphones and wearable sensors. Operation above 4MHz is not guaranteed and may compromise stability or efficiency due to internal timing limits and minimum on-time constraints.
How does the PHASE pin affect input capacitor selection in LTC3417EDHC#PBF designs?
The PHASE pin on the LTC3417EDHC#PBF selects whether the two channels operate in-phase or 180° out-of-phase. When set to 180° out-of-phase, input ripple currents partially cancel, reducing RMS input current by up to 30%. This allows designers to use smaller input capacitors - for example, a single 10μF X5R ceramic instead of two 4.7μF units - lowering cost and PCB area without compromising reliability.
Can LTC3417EDHC#PBF operate with only one channel enabled?
Yes, the LTC3417EDHC#PBF supports independent channel control via RUN1 and RUN2 pins. Either channel can be disabled while the other remains active - for instance, keeping the 1.4A channel powered for system core logic while disabling the 800mA channel during peripheral sleep. In half-active mode, total quiescent current drops to 260–400μA, preserving battery life without full shutdown.
What is the purpose of the ITH1 and ITH2 pins on LTC3417EDHC#PBF?
The ITH1 and ITH2 pins on the LTC3417EDHC#PBF serve as error amplifier compensation points and current comparator threshold controls for each channel. Their voltage (0–1.5V range) directly sets peak inductor current. During soft-start, these pins ramp linearly over 1024 clock cycles to limit inrush current. External RC networks on ITH pins also provide loop compensation to ensure stability across varying output capacitance and load conditions.
Does LTC3417EDHC#PBF require external Schottky diodes?
No, the LTC3417EDHC#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 enabling efficiencies up to 95%. This integration reduces thermal stress, simplifies layout, and avoids the cost, footprint, and reliability concerns associated with discrete diodes - especially critical in thermally constrained portable applications.
LTC3417EDHC#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:
- 800mA, 1.4A
- 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)
LTC3417EDHC#PBF FAQ
1.How can I place an order for LTC3417EDHC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417EDHC#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 LTC3417EDHC#PBF reliable?
The price and inventory of LTC3417EDHC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3417EDHC#PBF is usually 5 days.
3.What payment methods are accepted for LTC3417EDHC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417EDHC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417EDHC#PBF?
LTC3417EDHC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417EDHC#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 LTC3417EDHC#PBF?
For technical support, including LTC3417EDHC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417EDHC#PBF requirements.
6.How does Aetrix verify that LTC3417EDHC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3417EDHC#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 LTC3417EDHC#PBF meets industry standards.
7.What is the process for return or replacement of LTC3417EDHC#PBF?
All LTC3417EDHC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417EDHC#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 LTC3417EDHC#PBF part is unused and in its original packaging.
Return procedure for LTC3417EDHC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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