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Analog Devices Inc. LTC3417AEDHC#PBF
- Part No.:
- LTC3417AEDHC#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AEDHC#PBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,552
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Product details
Overview
LTC3417AEDHC#PBF from Analog Devices (formerly Linear Technology) is a dual-channel synchronous step-down DC/DC regulator IC with integrated 1.5A and 1A power switches, operating from 2.25V to 5.5V input, delivering adjustable 0.8V–5V outputs, featuring programmable 0.6–4MHz switching frequency, Burst Mode® for <125µA quiescent current, and 180° out-of-phase operation capability for reduced input RMS current in portable power management systems.
For engineers reviewing the LTC3417AEDHC#PBF datasheet, LTC3417AEDHC#PBF pinout, LTC3417AEDHC#PBF application, or LTC3417AEDHC#PBF equivalent, key selection criteria include verified dual-output current capability (1.5A/1A), confirmed DFN-16 (3mm × 3mm) thermal package with exposed PGND2 pad, validated phase control via PHASE pin, and documented efficiency curves across Burst Mode®, Pulse Skip, and Forced Continuous modes at 1.8V/2.5V outputs.
Technical Context
The LTC3417AEDHC#PBF implements a constant-frequency current-mode control architecture shared between both channels, with independent error amplifiers (ITH1/ITH2), peak current limiting (2.1A/1.4A min), and synchronized clock generation via internal oscillator or external SYNC/MODE input. Its dual-regulator topology supports independent RUN1/RUN2 enables and VFB1/VFB2 feedback networks for precise output voltage regulation.
Phase relationship is digitally selectable via the PHASE pin (VIN = in-phase, 0V = 180° out-of-phase), directly reducing input capacitor RMS current; frequency is set either by FREQ pin tied to VIN (1.5MHz) or RT resistor (0.6–4MHz), with guaranteed operation up to 4MHz in the DHC package per manufacturer characterization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and logic-supply rails without pre-regulation |
| Output Current | 1.5A (CH1) / 1A (CH2) - guaranteed minimum per channel, enabling dual-core SoC or FPGA core/I/O rail generation |
| Switching Frequency | 0.6MHz to 4MHz - allows use of sub-2mm-height inductors and ceramic capacitors for ultra-thin designs |
| Quiescent Current | 125µA (both channels in Sleep Mode) - extends battery runtime in always-on sensor or GPS modules |
| Feedback Voltage | 0.8V ±2% - enables precise output setting with standard resistor dividers; low reference reduces divider power loss |
| RDS(ON) | 88mΩ/84mΩ (CH1 top/bottom), 160mΩ/150mΩ (CH2 top/bottom) - ensures >95% peak efficiency at 3.6V input, 1.8V/2.5V outputs |
| Shutdown IQ | <1µA - meets stringent system-level standby power budgets in handheld instrumentation |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 17 = PGND2/GNDD), θJA = 43°C/W, rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND2/GNDD (Pin 1,10,11,17) | Dual-purpose ground return | Provides low-impedance path for SW2 N-channel driver and digital circuitry; exposed pad must be soldered to PCB ground plane for thermal and EMI performance |
| RUN1 (Pin 1) | Enable control for CH1 | Logic-high (>0.85V) activates 1.5A regulator; 0V disables CH1 and contributes to shutdown when both RUN pins are low |
| VIN1 (Pin 2) | Input supply for CH1 P-MOSFET | Connects to main input rail; powers high-side switch and associated gate drive circuitry for first channel |
| ITH1 (Pin 3) | Error amplifier output for CH1 | Controls peak inductor current via voltage-to-current conversion; compensation network connects here for loop stability |
| VFB1 (Pin 4) | Feedback input for CH1 | Monitors output voltage via resistive divider; regulates to 0.8V reference with ±0.1µA input bias for minimal divider error |
| VFB2 (Pin 5) | Feedback input for CH2 | Independent feedback node for second channel; enables separate output voltage programming (e.g., 1.8V core + 3.3V I/O) |
| ITH2 (Pin 6) | Error amplifier output for CH2 | Functions identically to ITH1 but for 1A channel; allows independent loop compensation |
| RUN2 (Pin 7) | Enable control for CH2 | Enables/disables 1A regulator independently; supports dynamic power sequencing in multi-rail systems |
| VIN2 (Pin 8) | Input supply for CH2 P-MOSFET & analog core | Powers second channel's high-side switch and internal bandgap/reference circuitry; may share VIN with VIN1 |
| SYNC/MODE (Pin 9) | Mode selection & clock sync | Selects Burst Mode® (VIN–0.5V), Pulse Skip (0.5V), or Forced Continuous (VIN/2); also accepts external clock for synchronization |
| SW2 (Pin 10) | Switch node for CH2 | Connects to inductor; swings between VIN2 and PGND2; requires low-inductance layout to minimize EMI |
| PGOOD (Pin 11) | Power-good status output | Open-drain signal pulled low if either VOUT deviates >6% from target; indicates valid regulation for downstream logic |
| FREQ (Pin 12) | Oscillator frequency control | Tied to VIN for 1.5MHz; RT resistor to GND sets 0.6–4MHz - enables optimization of size vs. efficiency tradeoff |
| GNDA (Pin 13) | Analog ground reference | Separate ground for internal error amplifiers and reference; must connect to quiet analog ground plane |
| PHASE (Pin 14) | Channel phase relationship control | VIN = in-phase, 0V = 180° out-of-phase - reduces input capacitor RMS current by up to 30% in dual-output configurations |
| SW1 (Pin 15) | Switch node for CH1 | Connects to CH1 inductor; same voltage swing behavior as SW2 but for 1.5A channel |
| PGND1 (Pin 16) | Ground for SW1 N-channel driver | Low-impedance return path for CH1 bottom switch; should be routed separately from PGND2 to avoid coupling |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous generation of two different output voltages (e.g., 1.2V CPU core + 2.5V memory interface) with separate enable and feedback control |
| 180° out-of-phase operation | Reduces input capacitor RMS current by ~25–30%, allowing smaller, lower-ESR input caps and improved thermal performance in compact layouts |
| Burst Mode® operation | Delivers >85% efficiency at 1mA load while maintaining 125µA total quiescent current - critical for battery-powered GPS/navigation devices |
| Programmable 0.6–4MHz frequency | Supports use of 1.5µH/2.2µH inductors ≤2mm height and 22µF ceramic output caps - enables ultra-thin PC card and modem designs |
| Internal soft-start with individual RUN control | Prevents inrush current during power-up; 1024-cycle ramp prevents output overshoot and allows staggered rail sequencing in multi-voltage systems |
| Short-circuit protected outputs | Current-limit thresholds (2.1A/1.4A min) prevent damage during output faults; hiccup mode not specified, but overcurrent protection is inherent in current-mode architecture |
Applications
| GPS/Navigation Module | Digital Camera Core Power |
|---|---|
Use Scenario: Dual-rail power for GPS baseband processor (1.2V) and RF front-end (2.8V) in automotive navigation units. IC Role / Device Role / Timing Role: LTC3417AEDHC#PBF provides tightly regulated, low-noise dual outputs with independent enable control for power sequencing. Use Value: 180° phase operation minimizes input ripple, reducing EMI on sensitive GNSS antenna traces; Burst Mode® extends battery life during standby tracking. | Use Scenario: Powering image sensor (1.8V) and ISP (2.5V) in compact digital cameras with strict height constraints. IC Role / Device Role / Timing Role: LTC3417AEDHC#PBF delivers 1.5A/1A outputs using 2mm-height inductors and ceramic caps in 3mm × 3mm footprint. Use Value: 4MHz programmable frequency enables smallest possible passive components; PGOOD signal validates both rails before sensor initialization. |
| PC Card (PCMCIA) Power | DSL Modem Line Card |
Use Scenario: Generating 3.3V I/O and 1.5V core rails for hot-pluggable PCMCIA cards in industrial laptops. IC Role / Device Role / Timing Role: LTC3417AEDHC#PBF provides fast transient response and independent RUN pin control for safe insertion/removal sequencing. Use Value: Current-mode control ensures stable regulation during sudden load changes; low dropout (100% duty cycle) maintains output during brownout conditions. | Use Scenario: Supplying 1.2V DSP core and 3.3V PHY interface in space-constrained DSL line cards. IC Role / Device Role / Timing Role: LTC3417AEDHC#PBF operates from 3.3V or 5V input, delivering precise dual outputs with minimal external components. Use Value: Phase-selectable operation lowers input cap stress; Pulse Skip mode suppresses audible noise in residential environments. |
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 quiescent current (250µA) | Predefined rail combinations only; less flexible for custom voltage requirements | Choose TPS65270RGET for cost-sensitive, fixed-rail applications where design reuse outweighs configurability needs |
| ISL95210IRZ | Higher current (3A/3A); supports Intel VR12.5; no Burst Mode®; larger 5mm × 5mm QFN | Targeted at CPU VR applications; lacks low-IQ sleep mode for battery use | Choose ISL95210IRZ for high-power computing loads requiring dynamic voltage identification (VID), not portable battery operation |
Compared with TPS65270RGET and ISL95210IRZ, the LTC3417AEDHC#PBF uniquely balances ultra-low quiescent current (125µA), full output voltage adjustability (0.8–5V), and 3mm × 3mm DFN packaging - making it optimal for space- and energy-constrained dual-rail embedded systems where flexibility and efficiency are co-prioritized.
Availability
LTC3417AEDHC#PBF is available at Aetrix Electronics and suitable for GPS navigation modules, digital camera power subsystems, and DSL modem line cards requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3417AEDHC#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The LTC3417AEDHC#PBF belongs to Linear's high-efficiency monolithic DC/DC converter product line, designed specifically for compact, battery-sensitive applications demanding dual independent outputs, ultra-low quiescent current, and flexible frequency and phase configuration.
FAQ
What is the maximum supported switching frequency for LTC3417AEDHC#PBF?
The LTC3417AEDHC#PBF supports a maximum switching frequency of 4MHz when configured with an external resistor from the FREQ pin to ground. This is validated for the DFN-16 (DHC) package per manufacturer characterization data and enables use of miniature inductors under 2mm height. Operation above 4MHz is not guaranteed and may compromise stability or efficiency.
Does LTC3417AEDHC#PBF support independent voltage regulation on both channels?
Yes, the LTC3417AEDHC#PBF supports fully independent voltage regulation via separate VFB1 and VFB2 pins, each referenced to a precise 0.8V internal bandgap. Each channel uses its own error amplifier (ITH1/ITH2) and feedback divider, allowing distinct output voltages (e.g., 1.2V and 3.3V) with independent enable (RUN1/RUN2) and mode control.
How does the PHASE pin affect input capacitor sizing in LTC3417AEDHC#PBF designs?
When the PHASE pin is driven low (0V), the LTC3417AEDHC#PBF configures Channel 2 to operate 180° out-of-phase with Channel 1, reducing combined input ripple current by up to 30%. This allows use of smaller input capacitors with lower RMS current ratings - a critical advantage in space-constrained PC card and modem applications.
What is the guaranteed minimum output current capability of LTC3417AEDHC#PBF per channel?
The LTC3417AEDHC#PBF guarantees a minimum output current of 1.5A for Channel 1 and 1.0A for Channel 2 across the full –40°C to +85°C temperature range and 2.25V–5.5V input voltage range, as confirmed by production test limits on peak switch current (ILIM1 ≥ 2.1A, ILIM2 ≥ 1.4A) and RDS(ON) specifications in the DHC package.
Can LTC3417AEDHC#PBF operate in dropout mode, and what is its behavior?
Yes, the LTC3417AEDHC#PBF enters dropout mode when VIN approaches VOUT, increasing duty cycle to 100%. In this state, the internal P-channel MOSFET remains continuously on, delivering VOUT ≈ VIN – (RDS(ON)_P × ILOAD) – (inductor DCR × ILOAD). Total quiescent current remains at 125µA, preserving battery life during brownout conditions.
LTC3417AEDHC#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#PBF FAQ
1.How can I place an order for LTC3417AEDHC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AEDHC#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#PBF reliable?
The price and inventory of LTC3417AEDHC#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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3417AEDHC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AEDHC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AEDHC#PBF?
LTC3417AEDHC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AEDHC#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#PBF?
For technical support, including LTC3417AEDHC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AEDHC#PBF requirements.
6.How does Aetrix verify that LTC3417AEDHC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AEDHC#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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3417AEDHC#PBF?
All LTC3417AEDHC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AEDHC#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#PBF part is unused and in its original packaging.
Return procedure for LTC3417AEDHC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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