My Inquiry
My Account
Analog Devices Inc. LTC3417AEFE#PBF
- Part No.:
- LTC3417AEFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3417AEFE#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A/1.5A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:151
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3417AEFE#PBF from Analog Devices (formerly Linear Technology) is a dual synchronous step-down DC/DC regulator IC with independent 1.5A and 1A output channels, operating from 2.25V to 5.5V input, supporting programmable switching frequency up to 4MHz, internal low-RDS(ON) MOSFETs, and selectable light-load modes for GPS/navigation and digital camera power rails.
For engineers reviewing the LTC3417AEFE#PBF datasheet, LTC3417AEFE#PBF pinout, LTC3417AEFE#PBF application, or LTC3417AEFE#PBF equivalent, key selection considerations include phase synchronization capability, Burst Mode® vs Pulse Skip mode trade-offs, 0.8V feedback reference accuracy, PGOOD assertion threshold (±6%), and TSSOP-20 thermal performance (θJA = 38°C/W).
Technical Context
The LTC3417AEFE#PBF implements a constant-frequency current-mode control architecture shared across both channels, with independent error amplifiers (ITH1/ITH2), peak-current limiting (2.5A on CH1, 1.7A on CH2), and synchronized clock generation via FREQ pin or external SYNC signal. It supports in-phase or 180° out-of-phase operation via the PHASE pin to reduce input RMS current.
Its three selectable light-load operating modes-Burst Mode® (high efficiency, ~125µA quiescent), Pulse Skip (low ripple), and forced continuous (fixed-frequency noise)-are controlled by the SYNC/MODE pin voltage level relative to VIN, with no external components required for mode transition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - Enables direct Li-ion battery (3.0–4.2V) and USB-powered operation without pre-regulation. |
| Output Current | CH1: 1.5A / CH2: 1A - Guaranteed minimum per channel; supports dual-core SoC core and I/O rail sequencing. |
| Switching Frequency | 0.6MHz to 4MHz - Adjustable via FREQ-to-ground resistor; 4MHz enables ≤2mm-height inductors for ultra-thin designs. |
| Feedback Voltage | 0.8V ±2% - Precise reference enables accurate 1.8V/2.5V/3.3V outputs using standard resistor ratios. |
| Quiescent Current | 125µA (both channels in sleep) - Extends battery runtime in always-on GPS or modem standby states. |
| Shutdown Current | <1µA - Meets stringent system-level leakage requirements for long-term storage or deep-sleep modes. |
| Power Good Threshold | ±6% of VFB - Provides reliable output regulation monitoring for FPGA or processor reset sequencing. |
Pinout & Package
Package: 20-Lead Plastic TSSOP (FE package), thermally enhanced with exposed pad (Pin 21 = PGND2/GNDD), θJA = 38°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN1 (Pin 2) | Enable input for CH1 (1.5A) | Logic-high (>0.85V) activates CH1; tied low disables CH1 and reduces total IQ to 260µA. |
| VIN1 (Pin 3) | Input supply for CH1 high-side switch | Must be decoupled locally; shares input rail with VIN2 but supports independent routing for noise isolation. |
| ITH1 (Pin 4) | Error amplifier output for CH1 | Compensation node; connects to RC network for loop stability; voltage controls peak inductor current. |
| VFB1 (Pin 5) | Feedback input for CH1 | Monitors resistive divider output; 0.8V reference sets VOUT1 = 0.8V × (1 + R1/R2). |
| SYNC/MODE (Pin 12) | Mode selection & external sync input | Voltage level selects Burst Mode® (>VIN–0.5V), Pulse Skip (<0.5V), or forced continuous (VIN/2); accepts external clock up to 4MHz. |
| PHASE (Pin 17) | Channel phase relationship control | High = CH1/CH2 in-phase; low = 180° out-of-phase - reduces input capacitor RMS current by ~30%. |
| PGOOD (Pin 14) | Open-drain power-good indicator | Pulled low if either VOUT deviates >6% from target; active only when corresponding RUN pin is high. |
| Exposed Pad (Pin 21) | PGND2/GNDD thermal & ground plane | Must be soldered to PCB ground pour; critical for thermal performance and EMI reduction in TSSOP layout. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent current-mode regulators | Enables simultaneous, non-interacting regulation of two different voltage rails with separate soft-start and enable control. |
| Internal 88mΩ/84mΩ (CH1) and 160mΩ/150mΩ (CH2) MOSFETs | Eliminates need for external Schottky diodes and reduces BOM count while maintaining ≥95% peak efficiency. |
| 180° phase-shift capability | Reduces input capacitor RMS current by up to 75% versus in-phase operation - allows smaller, lower-ESR input capacitors. |
| Three user-selectable light-load modes | Burst Mode® extends battery life; Pulse Skip maintains low-noise operation; forced continuous simplifies EMI filtering in telecom applications. |
| 100% duty-cycle dropout operation | Maintains regulation down to VOUT ≈ VIN – (ILOAD × RDS(ON)), critical for Li-ion end-of-discharge support in portable systems. |
Applications
| GPS/Navigation Module Power | Digital Camera Core & I/O Rails |
|---|---|
Use Scenario: Dual-rail power for GPS baseband processor (1.8V core) and RF front-end (2.5V analog). IC Role / Device Role / Timing Role: Primary dual-output DC/DC regulator delivering tightly regulated, low-noise supplies with independent enable control. Use Value: 125µA sleep current extends battery life during satellite acquisition; PGOOD ensures clean processor reset upon stable rail establishment. | Use Scenario: Powering image sensor (1.2V), ISP (1.8V), and memory interface (2.8V) in compact digital cameras. IC Role / Device Role / Timing Role: Compact dual-buck controller enabling space-constrained PCB layouts with minimal external components. Use Value: 4MHz operation allows use of 1.5µH/2.2µH shielded inductors ≤2mm height; TSSOP-20 footprint fits under camera module. |
| PC Card (PCMCIA) Host Interface | DSL/ Wireless Modem Baseband |
Use Scenario: Providing 3.3V VCC and 1.8V VIO for PC Card slot controllers in industrial laptops or docking stations. IC Role / Device Role / Timing Role: Dual-channel point-of-load regulator meeting PCMCIA JEIDA voltage tolerance and transient response specs. Use Value: Phase-shifted operation minimizes input ripple on shared 5V bus; ±6% PGOOD meets JEIDA power-fail detection timing. | Use Scenario: Generating 1.2V CPU core and 3.3V PHY rails in DSL modems with strict thermal limits in sealed enclosures. IC Role / Device Role / Timing Role: Thermally optimized dual-buck IC with 38°C/W θJA, supporting continuous 1.5A/1A loads without derating. Use Value: Exposed-pad TSSOP package enables direct thermal coupling to PCB ground plane; 125°C junction limit supports 85°C ambient operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270RGET | Fixed 1.2MHz frequency; no programmable mode selection; higher quiescent current (250µA vs 125µA) | Lacks Burst Mode®; less suitable for battery-critical GPS navigation | Prefer LTC3417AEFE#PBF when >2MHz operation or sub-200µA sleep current is required. |
| ISL95210IRZ | Supports 5V input only; no 2.25V start-up; integrated telemetry not present | Designed for notebook CPU VRMs; lacks PGOOD and phase control | Prefer LTC3417AEFE#PBF for wide-input portable applications requiring dual independent enables and phase shift. |
Compared with TPS65270RGET and ISL95210IRZ, the LTC3417AEFE#PBF offers broader input range (2.25–5.5V), lower quiescent current, programmable frequency up to 4MHz, and configurable phase relationship - making it uniquely suited for space- and battery-constrained dual-rail embedded systems.
Availability
LTC3417AEFE#PBF is available at Aetrix Electronics and suitable for GPS/navigation modules, digital camera power management, PC Card host interfaces, DSL/wireless modems, and general-purpose point-of-load DC/DC applications requiring stable component supply and long-term industrial availability.
Supply support for LTC3417AEFE#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.
The LTC3417A product line was designed for medium-power portable electronics requiring dual independent, high-efficiency, low-profile DC/DC conversion with advanced light-load optimization and flexible synchronization.
FAQ
What is the maximum supported switching frequency for the LTC3417AEFE#PBF?
The LTC3417AEFE#PBF supports a maximum switching frequency of 4MHz when configured with an appropriate resistor from the FREQ pin to ground. At this frequency, the device maintains stable current-mode operation and enables use of ultra-low-profile inductors (≤2mm height). The 4MHz limit is constrained by minimum on-time and duty-cycle requirements, especially at high VIN/VOUT ratios.
Does the LTC3417AEFE#PBF require external Schottky diodes?
No, the LTC3417AEFE#PBF 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 VIN = 3.6V. This synchronous rectification achieves up to 95% peak efficiency and eliminates reverse recovery losses and associated thermal stress.
How does the PHASE pin affect input capacitor sizing in the LTC3417AEFE#PBF?
The PHASE pin directly determines input RMS current magnitude: when set low (180° out-of-phase), input ripple current is reduced by up to 75% compared to in-phase operation. This allows use of smaller input capacitors with lower RMS current ratings - for example, a single 22µF ceramic instead of parallel 10µF + 10µF - improving reliability and reducing board area in space-constrained designs.
What is the function of the SYNC/MODE pin on the LTC3417AEFE#PBF?
The SYNC/MODE pin on the LTC3417AEFE#PBF serves two functions: (1) selecting light-load operating mode (Burst Mode®, Pulse Skip, or forced continuous) based on its DC voltage level, and (2) accepting an external clock signal up to 4MHz for synchronization. When used for synchronization, Pulse Skip mode is automatically selected regardless of voltage level.
Can the LTC3417AEFE#PBF operate with input voltage below 2.25V?
No, the LTC3417AEFE#PBF has a guaranteed operating input range of 2.25V to 5.5V. Below 2.25V, undervoltage lockout (UVLO) activates at approximately 2.07V (ramping down), disabling regulation to prevent unstable operation. The device will not regulate or deliver output current below this threshold, and PGOOD will remain asserted low until VIN exceeds the UVLO release threshold (~2.12V).
LTC3417AEFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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:
- 20-TSSOP-EP
LTC3417AEFE#PBF FAQ
1.How can I place an order for LTC3417AEFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AEFE#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 LTC3417AEFE#PBF reliable?
The price and inventory of LTC3417AEFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3417AEFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3417AEFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AEFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AEFE#PBF?
LTC3417AEFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AEFE#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 LTC3417AEFE#PBF?
For technical support, including LTC3417AEFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AEFE#PBF requirements.
6.How does Aetrix verify that LTC3417AEFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AEFE#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 LTC3417AEFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3417AEFE#PBF?
All LTC3417AEFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AEFE#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 LTC3417AEFE#PBF part is unused and in its original packaging.
Return procedure for LTC3417AEFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3417AEFE#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
