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Analog Devices Inc. LTC3417AIFE-2#TRPBF
- Part No.:
- LTC3417AIFE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3417AIFE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A/1.5A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,346
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Product details
Overview
LTC3417AIFE-2#TRPBF from Analog Devices (formerly Linear Technology) is a dual synchronous step-down DC/DC regulator with independent 1.5A and 1A output channels, 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-channel/N-channel MOSFETs for >95% peak efficiency in GPS navigation power rails.
For engineers reviewing the LTC3417AIFE-2#TRPBF datasheet, LTC3417AIFE-2#TRPBF pinout, LTC3417AIFE-2#TRPBF application, or LTC3417AIFE-2#TRPBF equivalent, key selection criteria include its dual-channel phase control (in-phase or 180° out-of-phase), Burst Mode™ operation for <125μA quiescent current, and TSSOP-20 package compatibility with industrial temperature range (–40°C to 125°C).
Technical Context
The LTC3417AIFE-2#TRPBF uses constant-frequency current-mode control with shared oscillator and user-selectable phase relationship via PHASE pin. Its dual-loop architecture enables independent regulation of both outputs using separate VFB1/VFB2 feedback paths and ITH1/ITH2 compensation nodes.
Mode selection (Burst Mode, Pulse Skip, Forced Continuous) is controlled by SYNC/MODE pin voltage thresholds, while FREQ pin supports either internal 1.5MHz operation or external resistor-programmable frequency from 0.6MHz to 4MHz - enabling optimization of inductor size versus light-load efficiency.
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 rail inputs without pre-regulation. |
| Output Current (Ch1/Ch2) | 1.5A / 1A guaranteed minimum - enables powering core logic and I/O rails simultaneously. |
| Switching Frequency | Up to 4MHz - allows use of sub-2mm-height inductors and compact ceramic capacitors. |
| Feedback Reference Voltage | 0.8V ±2% - sets precise output regulation point with standard resistor dividers. |
| Quiescent Current | 125μA in Sleep mode - extends battery life in always-on instrumentation systems. |
| Shutdown Current | <1μA - ensures negligible drain during system standby or deep sleep states. |
| Power Good Threshold | ±6% deviation from VFB - provides reliable sequencing and fault detection for downstream processors. |
Pinout & Package
Package: 20-Lead Plastic TSSOP with exposed pad (PGND2/GNDD); thermal resistance θJA = 38°C/W; operating junction temperature up to 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN1 (Pin 2) | Enable control for 1.5A channel | Logic-high (>0.85V) activates Ch1; 0V disables Ch1 and contributes to full shutdown when RUN2 also low. |
| VIN1 (Pin 3) | Input supply for 1.5A channel | Connects to main input rail; powers P-channel switch and gate drivers for Ch1. |
| ITH1 (Pin 4) | Error amplifier output for Ch1 | Controls peak inductor current threshold; compensation network connects here for loop stability. |
| VFB1 (Pin 5) | Feedback input for Ch1 | Monitors divided output voltage; regulates to 0.8V reference for precise 1.5A output setting. |
| VFB2 (Pin 6) | Feedback input for Ch2 | Independent regulation node for 1A output; identical 0.8V reference as VFB1. |
| ITH2 (Pin 7) | Error amplifier output for Ch2 | Separate compensation path for Ch2; enables independent loop tuning for differing load dynamics. |
| RUN2 (Pin 8) | Enable control for 1A channel | Enables/disables second regulator; combined with RUN1 for flexible power sequencing. |
| VIN2 (Pin 9) | Input supply for 1A channel & analog circuitry | Shared input for Ch2 and internal bias; must be connected to same VIN as VIN1 unless isolated design. |
| SYNC/MODE (Pin 12) | Mode selection & clock sync input | Selects Burst Mode (high), Pulse Skip (low), or Forced Continuous (mid); accepts external clock for synchronization. |
| FREQ (Pin 15) | Oscillator frequency control | Shorted to VIN → 1.5MHz; resistor to GND → 0.6–4MHz programmable frequency. |
| PHASE (Pin 17) | Channel phase relationship control | High = in-phase switching; low = 180° out-of-phase - reduces RMS input current and input capacitor stress. |
| PGOOD (Pin 14) | Power-good status output | Open-drain signal pulled low if either VOUT deviates >6% from target - used for system reset or enable sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous MOSFETs | Eliminates need for external Schottky diodes; RDS(ON) = 88mΩ (top)/84mΩ (bottom) for Ch1 at 3.6V VIN - reduces conduction loss and board area. |
| Dual-channel phase control | 180° out-of-phase operation lowers input ripple current by ~30%, permitting smaller input capacitors and reduced EMI filtering requirements. |
| Burst Mode™ operation | Delivers <35mVP-P output ripple at light loads while maintaining >85% efficiency down to 1mA - ideal for battery-powered GPS receivers. |
| Low dropout operation | 100% duty cycle capability maintains regulation as VIN approaches VOUT - critical for Li-ion battery discharge down to 2.5V. |
| Individual soft-start control | Independent RUN1/RUN2 pins allow staggered startup sequencing to prevent inrush current overload on shared input rails. |
Applications
| GPS Navigation Systems | Automotive Instrumentation |
|---|---|
Use Scenario: Powering RF front-end, baseband processor, and display backlight in portable automotive GPS units. IC Role / Device Role / Timing Role: Dual-output regulator supplying 1.8V/1.5A to processor core and 2.5V/1A to RF transceiver with tight ripple control. Use Value: Burst Mode™ extends runtime between charges; 4MHz operation enables ultra-compact layout meeting AEC-Q200 space constraints. |
Use Scenario: Supplying cluster microcontroller, CAN transceiver, and sensor interface ICs in digital instrument panels. IC Role / Device Role / Timing Role: Primary point-of-load converter delivering stable 3.3V and 5V rails from 12V battery via intermediate 5V bus. Use Value: –40°C to 125°C rating ensures reliability across engine bay temperatures; PGOOD enables safe boot sequencing. |
| Industrial PC Cards | General Purpose Point-of-Load |
Use Scenario: Providing regulated 1.2V and 3.3V to FPGA, DDR memory, and PCIe controller on hot-pluggable industrial M.2 modules. IC Role / Device Role / Timing Role: Dual-channel buck converter with independent RUN pins enabling dynamic power gating per subsystem. Use Value: Phase control minimizes input ripple on shared backplane supplies; TSSOP-20 footprint simplifies rework and test access. |
Use Scenario: Replacing discrete LDOs in embedded controllers requiring efficient 1.5A + 1A rails with minimal BOM count. IC Role / Device Role / Timing Role: Compact, high-efficiency DC/DC solution replacing two separate converters and reducing thermal density. Use Value: Integrated MOSFETs and 0.8V reference simplify design; 125μA sleep current meets Energy Star standby requirements. |
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; 2.95–6.5V input range. | Suitable for fixed-rail applications only; lacks adjustable VOUT and phase control. | Choose when output voltages are static and cost sensitivity outweighs flexibility needs. |
| ISL85412IRZ-T7A | Single 2A output; no dual-channel capability; supports 3–36V input; integrated compensation. | Requires two devices for dual-rail designs; better suited for wide-input industrial systems. | Prefer when higher input voltage tolerance or simplified layout (single-channel) is prioritized over dual-rail integration. |
Compared with TPS65270RGET and ISL85412IRZ-T7A, the LTC3417AIFE-2#TRPBF uniquely delivers independently adjustable dual outputs, 180° phase control, and sub-125μA sleep current in a single TSSOP-20 package - making it optimal for space-constrained, battery-sensitive dual-rail systems where regulation precision and thermal management are critical.
Availability
LTC3417AIFE-2#TRPBF is available at Aetrix Electronics and suitable for GPS navigation systems, automotive instrumentation, and industrial PC cards requiring stable component supply across extended temperature ranges.
Supply support for LTC3417AIFE-2#TRPBF 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 and industrial qualification standards.
The LTC3417A series was designed for medium-power dual-rail point-of-load conversion in portable and harsh-environment electronics, emphasizing efficiency at light loads, compact magnetics support, and robust thermal performance.
FAQ
What is the maximum supported switching frequency for the LTC3417AIFE-2#TRPBF?
The LTC3417AIFE-2#TRPBF supports up to 4MHz switching frequency when configured with an external resistor on the FREQ pin. At this frequency, the device enables use of miniature inductors ≤2mm height and low-ESR ceramic capacitors, reducing total solution size while maintaining >90% efficiency at moderate loads. The LTC3417AIFE-2#TRPBF achieves this without compromising loop stability due to its current-mode architecture and dedicated ITH compensation nodes.
How does the PHASE pin affect input capacitor stress in the LTC3417AIFE-2#TRPBF?
The PHASE pin on the LTC3417AIFE-2#TRPBF selects whether the two channels operate in-phase or 180° out-of-phase. When set low (0V), out-of-phase operation reduces RMS input current by up to 30%, directly lowering ripple stress on the input capacitor and permitting smaller capacitance values or relaxed ESR requirements. This is confirmed in the datasheet's "in-phase vs out-of-phase" RMS current equations and validated in typical application Figure TA01.
Can the LTC3417AIFE-2#TRPBF regulate both outputs to different voltages simultaneously?
Yes, the LTC3417AIFE-2#TRPBF supports independent output voltage regulation: VOUT1 is set via resistive divider to VFB1, and VOUT2 via divider to VFB2 - each referenced to the same 0.8V internal bandgap. Both outputs can be adjusted from 0.8V to 5V, enabling configurations like 1.8V/1.5A + 3.3V/1A for processor + peripheral rails. The LTC3417AIFE-2#TRPBF maintains regulation accuracy of ±2% over line, load, and temperature for each channel.
What is the quiescent current of the LTC3417AIFE-2#TRPBF in Burst Mode operation?
In Burst Mode™ operation, the LTC3417AIFE-2#TRPBF draws 125μA typical quiescent current with both channels active - verified in the Electrical Characteristics table under "Both Channels in Sleep Mode". This value drops to <1μA in full shutdown (RUN1 = RUN2 = 0V). The LTC3417AIFE-2#TRPBF achieves this ultra-low IQ through adaptive gate drive and discontinuous switching that minimizes gate charge losses at light loads.
Does the LTC3417AIFE-2#TRPBF require external Schottky diodes?
No, the LTC3417AIFE-2#TRPBF integrates synchronous P-channel and N-channel MOSFETs for both channels, eliminating the need for external Schottky diodes. Its RDS(ON) values - 88mΩ/84mΩ (Ch1) and 160mΩ/150mΩ (Ch2) at 3.6V - ensure high efficiency (>95% peak) without diode forward voltage drop or associated thermal derating. This integration reduces BOM count, PCB area, and thermal design complexity compared to asynchronous buck solutions.
LTC3417AIFE-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 20-TSSOP-EP
LTC3417AIFE-2#TRPBF FAQ
1.How can I place an order for LTC3417AIFE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AIFE-2#TRPBF 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 LTC3417AIFE-2#TRPBF reliable?
The price and inventory of LTC3417AIFE-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3417AIFE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3417AIFE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AIFE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AIFE-2#TRPBF?
LTC3417AIFE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AIFE-2#TRPBF 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 LTC3417AIFE-2#TRPBF?
For technical support, including LTC3417AIFE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AIFE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3417AIFE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AIFE-2#TRPBF 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 LTC3417AIFE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3417AIFE-2#TRPBF?
All LTC3417AIFE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AIFE-2#TRPBF, 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 LTC3417AIFE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3417AIFE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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