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Analog Devices Inc. LTC3417AIFE#TRPBF
- Part No.:
- LTC3417AIFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3417AIFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A/1.5A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,182
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Product details
Overview
LTC3417AIFE#TRPBF from Analog Devices (formerly Linear Technology) is a dual synchronous step-down DC/DC regulator IC with 1.5A/1A output capability, operating from 2.25V to 5.5V input and delivering adjustable outputs from 0.8V to 5V per channel. It features programmable switching frequency up to 4MHz, internal low-RDS(ON) MOSFETs, Burst Mode® operation for high light-load efficiency (up to 95%), and phase-selectable dual-channel operation for reduced input RMS current - used in compact point-of-load power supplies for digital cameras and wireless modems.
For engineers reviewing the LTC3417AIFE#TRPBF datasheet, LTC3417AIFE#TRPBF pinout, LTC3417AIFE#TRPBF application, or LTC3417AIFE#TRPBF equivalent, key selection criteria include its dual-channel current-mode control architecture, 125µA sleep-mode quiescent current, 180° out-of-phase operation capability via PHASE pin, and support for external clock synchronization on SYNC/MODE pin - all critical for battery-powered, space-constrained, multi-rail systems requiring low-noise or high-efficiency operation.
Technical Context
The LTC3417AIFE#TRPBF implements a constant-frequency, current-mode control architecture shared across both channels, with independent error amplifiers (ITH1/ITH2), peak current limiting (2.5A/1.7A typ), and programmable oscillator frequency (0.6–4MHz via FREQ pin resistor). Its dual-regulator design supports synchronized or 180° out-of-phase switching to minimize input capacitor RMS current.
Mode selection is unified via the SYNC/MODE pin: >VIN–0.5V enables Burst Mode® (high efficiency, ~125µA IQ), <0.5V enables Pulse Skip mode (low ripple), and VIN/2 enables Forced Continuous mode (fixed-frequency noise). The device includes undervoltage lockout (2.25V min), power-good monitoring (±6% VFB threshold), and 100% duty-cycle dropout operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and logic-supply rails without pre-regulation. |
| Output Current (Ch1/Ch2) | 1.5A / 1A guaranteed minimum - enables simultaneous powering of core logic and I/O rails. |
| Switching Frequency | Programmable 0.6MHz–4MHz - allows optimization of inductor size (≤2mm height) vs. efficiency. |
| Feedback Reference Voltage | 0.800V ±2% - sets output voltage via external resistor divider; enables precise 1.8V, 2.5V, 3.3V rails. |
| Quiescent Current (Sleep) | 125µA typ - extends battery life in standby; drops to <1µA in shutdown. |
| RDS(ON) (Top/Bottom, Ch1) | 88mΩ / 84mΩ at 3.6V - reduces conduction loss; eliminates need for external Schottky diodes. |
| Power Good Accuracy | ±6% of VFB - provides reliable system-level rail monitoring for sequencing or fault detection. |
Pinout & Package
The LTC3417AIFE#TRPBF is packaged in a 20-lead plastic TSSOP (FE package) with exposed pad (Pin 21 = PGND2/GNDD), thermally enhanced for industrial ambient range (–40°C to +85°C). Pin count and layout match LTC3417AEFE#TRPBF; exposed pad must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN1 (Pin 2) | Enable control for 1.5A channel | Logic-high (>0.85V) activates Channel 1; 0V disables it and contributes to full shutdown when paired with RUN2. |
| VIN1 (Pin 3) | Input supply for Ch1 P-MOSFET | Connects to main input rail; separate from VIN2 to allow independent input sourcing if needed. |
| ITH1 (Pin 4) | Error amplifier output for Ch1 | Controls peak inductor current; compensation network connects here to stabilize loop response. |
| VFB1 (Pin 5) | Feedback input for Ch1 | Monitors divided output voltage; 0.8V reference enables accurate regulation of VOUT1. |
| VFB2 (Pin 6) | Feedback input for Ch2 | Independent feedback path for second output; supports different VOUT2 settings than VOUT1. |
| RUN2 (Pin 8) | Enable control for 1A channel | Enables/disables Channel 2 independently; both RUN pins low places device in <1µA shutdown. |
| SYNC/MODE (Pin 12) | Mode selection & clock sync | Selects Burst/Pulse Skip/Forced Continuous mode; also accepts external clock for synchronization. |
| FREQ (Pin 15) | Oscillator frequency set | Connect to VIN for 1.5MHz; connect resistor to GND for 0.6–4MHz tuning - critical for EMI and component sizing. |
| PHASE (Pin 17) | Channel phase relationship | High = in-phase switching; low = 180° out-of-phase - reduces input capacitor RMS current by up to 30%. |
| PGOOD (Pin 14) | Open-drain power-good indicator | Pulled low if either VOUT1 or VOUT2 deviates >6% from target - used for system enable/disable sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent current-mode regulators | Enables stable, fast transient response on both outputs without cross-coupling; supports differing load dynamics. |
| 180° out-of-phase switching capability | Reduces input capacitor RMS current by ~25–30%, allowing smaller, lower-rated input bulk capacitors. |
| Burst Mode® operation | Achieves >90% efficiency at 1mA load with only 125µA quiescent current - ideal for always-on subsystems. |
| Internal low-RDS(ON) MOSFETs (Ch1: 84–88mΩ) | Eliminates external Schottky diodes and associated board area, BOM cost, and thermal management overhead. |
| Individual RUN pin control with soft-start | Allows staggered power-up of rails; built-in 1024-cycle digital soft-start prevents inrush current and output overshoot. |
Applications
| Digital Camera Power Management | Wireless Modem Point-of-Load |
|---|---|
Use Scenario: Dual-rail supply for image sensor (1.8V/1.5A) and baseband processor (2.5V/1A) in compact handheld camera modules. IC Role / Device Role / Timing Role: Primary dual-output DC/DC regulator providing tightly regulated, low-noise, sequenced power with minimal footprint. Use Value: Enables use of tiny 2mm-height inductors and ceramic capacitors; Burst Mode® extends battery runtime during preview/idle states. | Use Scenario: Powering RF transceiver (3.3V/1A) and digital controller (1.2V/1.5A) in LTE/5G USB dongles or embedded modems. IC Role / Device Role / Timing Role: Synchronous buck converter delivering two independent, phase-controlled outputs to minimize conducted EMI on shared input bus. Use Value: 180° out-of-phase operation cuts input ripple current by ~30%, easing filtering requirements and improving EMC compliance. |
| PC Card (PCMCIA) Power Supply | Industrial IoT Sensor Node |
Use Scenario: Generating 3.3V/1.5A and 5.0V/1A from 5V host bus for legacy PC Card peripherals with strict height constraints. IC Role / Device Role / Timing Role: Compact dual-buck regulator replacing discrete solutions; supports hot-plug sequencing via independent RUN pins. Use Value: Integrated soft-start and PGOOD enable safe insertion/removal; 4MHz max frequency allows smallest possible magnetics. | Use Scenario: Battery-powered edge node with microcontroller (3.3V/0.3A), LoRa transceiver (3.3V/0.5A), and analog sensor interface (2.5V/0.1A). IC Role / Device Role / Timing Role: Dual-output power manager enabling selective rail shutdown and ultra-low-quiescent operation. Use Value: 125µA sleep current and <1µA shutdown extend 10-year battery life; Pulse Skip mode maintains low output ripple during wake cycles. |
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 IQ (250µA sleep) | Predefined dual-rail solution for fixed-voltage systems; lacks VFB-based adjustability | Choose when standard 1.2V/3.3V rails suffice and board space is less constrained. |
| ISL95210IRZ | Supports up to 3A/3A; requires external MOSFETs; no integrated PHASE control | Higher-current, discrete-FET solution for demanding loads; lacks integrated phase management | Choose for >1.5A per rail or when thermal design requires external FET placement. |
Compared with TPS65270RGET and ISL95210IRZ, the LTC3417AIFE#TRPBF offers unique flexibility in output voltage adjustment (0.8–5V), fine-grained frequency programming (0.6–4MHz), and hardware-configurable channel phasing - making it optimal for compact, multi-rail, battery-sensitive designs where regulation precision and EMI control are prioritized over raw current headroom or fixed-voltage simplicity.
Availability
LTC3417AIFE#TRPBF is available at Aetrix Electronics and suitable for digital camera power management, wireless modem point-of-load conversion, and PC Card (PCMCIA) power supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3417AIFE#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, 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 LTC3417AIFE#TRPBF belongs to ADI's Power by Linear™ family of high-efficiency, high-density DC/DC converters designed specifically for space-constrained, battery-operated, and multi-rail embedded systems requiring low quiescent current and precise regulation.
FAQ
What is the maximum switching frequency supported by the LTC3417AIFE#TRPBF?
The LTC3417AIFE#TRPBF supports a maximum switching frequency of 4MHz when configured with an appropriate resistor from the FREQ pin to ground. At this frequency, the device enables use of ultra-compact inductors ≤2mm in height and small ceramic capacitors, ideal for thin-profile portable electronics. Operation above 4MHz is not specified or guaranteed.
Does the LTC3417AIFE#TRPBF require external Schottky diodes?
No, the LTC3417AIFE#TRPBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs for both channels, with typical RDS(ON) values of 88mΩ/84mΩ (Ch1) and 160mΩ/150mΩ (Ch2) at 3.6V. This synchronous rectification eliminates conduction losses and thermal overhead associated with external diodes.
How does the PHASE pin affect input capacitor sizing in the LTC3417AIFE#TRPBF?
The PHASE pin on the LTC3417AIFE#TRPBF selects whether the two channels switch in-phase or 180° out-of-phase. When set low (0V), out-of-phase operation reduces input RMS current by up to ~30% compared to in-phase mode - directly enabling smaller input bulk capacitors and relaxed ESR/ripple current ratings in the design.
Can the LTC3417AIFE#TRPBF operate with only one channel enabled?
Yes, the LTC3417AIFE#TRPBF supports independent channel operation. Pulling RUN1 high and RUN2 low enables only the 1.5A channel, drawing just 260–400µA supply current (half-active mode). Similarly, RUN2 high with RUN1 low enables only the 1A channel. Both RUN pins low places the entire device in <1µA shutdown.
What is the feedback reference voltage accuracy for the LTC3417AIFE#TRPBF?
The LTC3417AIFE#TRPBF has a feedback reference voltage of 0.800V with ±2% initial accuracy (0.784V to 0.816V) over temperature. This tight tolerance ensures precise output voltage regulation - for example, a 1.8V output set by a resistor divider will maintain ±36mV accuracy under nominal conditions, critical for sensitive digital loads.
LTC3417AIFE#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3417AIFE#TRPBF FAQ
1.How can I place an order for LTC3417AIFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AIFE#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#TRPBF reliable?
The price and inventory of LTC3417AIFE#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3417AIFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AIFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AIFE#TRPBF?
LTC3417AIFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AIFE#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#TRPBF?
For technical support, including LTC3417AIFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AIFE#TRPBF requirements.
6.How does Aetrix verify that LTC3417AIFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AIFE#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3417AIFE#TRPBF?
All LTC3417AIFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AIFE#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3417AIFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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