My Inquiry
My Account
Analog Devices Inc. LTC3417AEFE-1#PBF
- Part No.:
- LTC3417AEFE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3417AEFE-1#PBF.pdf
- Description:
- IC REG BUCK ADJ 1A/1.5A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,570
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3417AEFE-1#PBF from Analog Devices (formerly Linear Technology) is a dual-channel synchronous step-down DC/DC regulator IC designed for medium-power point-of-load conversion. It delivers 1.5A and 1A output currents respectively, operates from 2.25V to 5.5V input, supports programmable switching frequency up to 4MHz, features integrated low-RDS(ON) MOSFETs, and includes Power-On-Reset (POR) monitoring for GPS/navigation power rails.
For engineers reviewing the LTC3417AEFE-1#PBF datasheet, LTC3417AEFE-1#PBF pinout, LTC3417AEFE-1#PBF application, or LTC3417AEFE-1#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency curves across Burst Mode and pulse-skip operation, exact package mapping to 20-lead TSSOP, and two manufacturer-validated alternative parts with documented functional and thermal differences.
Technical Context
The LTC3417AEFE-1#PBF uses a constant-frequency current-mode architecture with shared oscillator timing across both channels. Its PHASE pin selects in-phase or 180° out-of-phase switching to reduce input RMS current stress, while the SYNC/MODE pin configures Burst Mode (high light-load efficiency), pulse-skip mode (low ripple), or forced continuous mode (fixed-frequency noise).
Each channel employs internal P-channel and N-channel MOSFETs with RDS(ON) of 0.088Ω/0.084Ω (CH1) and 0.16Ω/0.15Ω (CH2) at 3.6V VIN, enabling dropout operation at 100% duty cycle. The POR pin asserts low when either VFB falls ≥8% below 0.8V reference and de-asserts after ~150ms once regulation recovers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without external LDO pre-regulation. |
| Output Current | 1.5A (CH1) / 1A (CH2) - guaranteed minimum per channel with peak switch limits of 2.5A and 1.7A respectively. |
| Switching Frequency | 0.6MHz–4MHz (resistor-programmable) or 1.5MHz (FREQ = VIN) - enables use of sub-2mm-height inductors and compact ceramic capacitors. |
| Feedback Voltage | 0.784V–0.816V (±2%) - precise 0.8V reference allows accurate output setting from 0.8V to 5V via external resistor dividers. |
| Quiescent Current | 125μA (both channels in Sleep Mode), <1μA (shutdown) - extends battery life in always-on instrumentation and automotive modules. |
| Thermal Resistance | θJA = 38°C/W (TSSOP package) - enables 1.5A/1A operation at ambient up to 85°C without forced airflow. |
| POR Threshold | –8% VFB trip, +150ms delay on recovery - provides deterministic system reset timing for microcontroller sequencing in navigation systems. |
Pinout & Package
Package: 20-lead plastic TSSOP (FE package), 4.4mm × 6.5mm × 1.1mm body, exposed thermal pad (Pin 21 = PGND2/GNDD) requiring PCB solder connection for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN1 (Pin 2) | Enable control for CH1 (1.5A) | Logic-high (>0.85V) activates CH1; 0V disables CH1 and places it in sleep mode (125μA IQ). |
| VIN1 (Pin 3) | Input supply for CH1 P-MOSFET | Must be connected to main input rail; shares voltage domain with VIN2 but not electrically tied internally. |
| ITH1 (Pin 4) | Error amplifier compensation node for CH1 | 0–1.5V control voltage sets peak inductor current; used for loop compensation with external RC network. |
| VFB1 (Pin 5) | Feedback input for CH1 output | Monitors resistive divider output; regulates to 0.8V reference; ±0.1μA input bias minimizes divider error. |
| VFB2 (Pin 6) | Feedback input for CH2 output | Independent 0.8V reference input; enables separate output voltage programming for dual-rail systems. |
| ITH2 (Pin 7) | Error amplifier compensation node for CH2 | Functionally identical to ITH1 but isolated per channel for independent loop tuning. |
| RUN2 (Pin 8) | Enable control for CH2 (1A) | Independent enable allows asymmetric power sequencing (e.g., core rail before I/O rail). |
| VIN2 (Pin 9) | Input supply for CH2 P-MOSFET and analog circuitry | Primary supply for internal bandgap, POR, and logic; must be stable and low-noise. |
| SYNC/MODE (Pin 12) | Mode selection & external clock 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. |
| POR (Pin 14) | Open-drain Power-On-Reset output | Pulled low during any output undervoltage event; holds low for ≥150ms after both outputs recover to –6% of target. |
| FREQ (Pin 15) | Oscillator frequency set input | Connect to VIN for 1.5MHz fixed frequency; connect RT resistor to GND for 0.6–4MHz programmable operation. |
| PHASE (Pin 17) | Channel phase relationship control | High = CH1 and CH2 in-phase; Low = 180° out-of-phase - reduces input capacitor RMS current by up to 30%. |
| SW1 (Pin 18) | CH1 switch node | Connects to CH1 inductor; swings between VIN1 and PGND1; requires low-inductance layout for EMI control. |
| PGND1 (Pin 19) | CH1 N-MOSFET source return | Dedicated ground path for CH1 power stage; must be routed separately from analog ground to avoid noise coupling. |
| PGND2/GNDD (Pins 1,10,11,20 + Exposed Pad 21) | CH2 power and digital ground | Multi-pin grounding improves thermal dissipation and reduces ground bounce in high-current CH2 switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous 1.5A and 1A outputs with separate RUN, VFB, and ITH pins - supports asymmetric rail generation (e.g., 1.8V core + 2.5V I/O). |
| Burst Mode® operation | Achieves >90% efficiency at 1mA load (CH1) and >85% at 0.1mA (CH2), reducing quiescent power in always-on GPS receivers. |
| 180° out-of-phase switching | Reduces input capacitor RMS current by ~25% versus in-phase operation - allows smaller 10μF X5R ceramic input caps instead of 22μF. |
| Integrated low-RDS(ON) switches | Eliminates need for external Schottky diodes and gate drivers - simplifies BOM and reduces board area in space-constrained PC cards. |
| Programmable POR delay | De-assertion delay of 212,992 cycles (~150ms at 1.5MHz) ensures reliable MCU reset timing without external RC timing components. |
Applications
| GPS/Navigation Systems | Automotive Instrumentation |
|---|---|
|
Use Scenario: Dual-rail power for GPS baseband processor (1.2V/1.5A) and RF front-end (2.8V/1A) in compact automotive telematics modules. IC Role / Device Role / Timing Role: Primary DC/DC converter providing regulated, low-noise, sequenced power with POR-driven MCU reset coordination. Use Value: Burst Mode extends battery runtime during vehicle ignition-off tracking; 180° phase reduces input cap stress under pulsed RF load. |
Use Scenario: Powering digital cluster microcontroller (3.3V/1.5A) and CAN transceiver (5V/1A) in instrument panel ECUs. IC Role / Device Role / Timing Role: Dual-output buck regulator with independent RUN control enabling safe power-up sequencing and fault-isolated shutdown. Use Value: POR output directly drives cluster MCU reset pin; low 1μA shutdown current meets ISO 16750-2 quiescent drain requirements. |
| PC Cards | Industrial Point-of-Load |
|
Use Scenario: Compact 20-lead TSSOP footprint powers PCIe SSD controller (1.1V/1.5A) and NAND flash interface (1.8V/1A) in M.2 form factor. IC Role / Device Role / Timing Role: High-density, thermally efficient dual-buck regulator supporting tight height constraints (<2mm component stackup). Use Value: 4MHz max switching frequency enables 1.5μH inductors; θJA = 38°C/W sustains full load at 70°C ambient without heatsink. |
Use Scenario: Distributed 24V-to-3.3V/1.5A and 12V-to-5V/1A conversion in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Isolated dual-channel regulator with independent feedback loops for mixed-voltage fieldbus and FPGA domains. Use Value: Pulse-skip mode maintains <35mVP-P ripple at light loads - prevents false triggering in analog sensor signal chains. |
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 |
|---|---|---|---|
| LTC3417AEDHC-1#PBF | Same die, 16-lead 3mm×5mm DFN package with θJA = 43°C/W; no GNDD pins - single PGND plane. | Higher thermal resistance limits continuous 1.5A/1A output at >70°C ambient; preferred for space-constrained layouts over thermal-critical ones. | Select when PCB area is constrained and thermal margin >15°C exists; avoid in sealed enclosures above 65°C ambient. |
| TPS65270PWP | TI dual 2A/1.5A buck; fixed 1.2MHz frequency; no programmable POR delay; higher IQ (250μA sleep) and no phase control. | Lacks 180° phase option and adjustable POR timing - less suitable for input-capacitor-sensitive automotive or GPS designs. | Choose for cost-sensitive industrial applications where fixed frequency and simpler sequencing suffice; verify POR timing compatibility. |
Compared with LTC3417AEFE-1#PBF, the DFN variant trades thermal performance for footprint reduction, while the TPS65270PWP sacrifices phase control and POR flexibility for higher current rating and lower unit cost - making LTC3417AEFE-1#PBF optimal for thermally demanding, noise-sensitive dual-rail navigation systems.
Availability
LTC3417AEFE-1#PBF is available at Aetrix Electronics and suitable for GPS/navigation systems, automotive instrumentation, and industrial point-of-load DC/DC applications requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for LTC3417AEFE-1#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 full product support, datasheet documentation, and application engineering for legacy Linear parts including the LTC3417A family.
The LTC3417A series was designed specifically for high-efficiency, dual-output power conversion in portable and automotive electronics where small size, low quiescent current, and precise POR timing are critical system requirements.
FAQ
What is the maximum operating temperature for the LTC3417AEFE-1#PBF?
The LTC3417AEFE-1#PBF is rated for operation from –40°C to +85°C ambient. Its junction temperature must not exceed 125°C, and with θJA = 38°C/W, it supports full 1.5A/1A output at 85°C ambient when properly heatsinked via the exposed pad. Derating is required above 70°C ambient for continuous maximum load.
Does the LTC3417AEFE-1#PBF require external Schottky diodes?
No, the LTC3417AEFE-1#PBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs for both channels, eliminating conduction losses and thermal overhead associated with external diodes - a key feature confirmed in the datasheet's "No Schottky Diodes Required" feature list.
How is the switching frequency programmed on the LTC3417AEFE-1#PBF?
The LTC3417AEFE-1#PBF switching frequency is set via the FREQ pin: tie FREQ to VIN for 1.5MHz operation, or connect an external resistor (RT) from FREQ to GND to program 0.6MHz–4MHz using RT ≈ (1.61×10¹¹/fO) – 16.586kΩ. This resistor-based method is production-guaranteed per datasheet Note 6.
What is the purpose of the PHASE pin on the LTC3417AEFE-1#PBF?
The PHASE pin on the LTC3417AEFE-1#PBF selects the relative switching timing between channels: logic high enables in-phase operation; logic low enables 180° out-of-phase switching. This reduces input capacitor RMS current and thermal stress - a function explicitly detailed in the Pin Functions section and Figure 1 of the datasheet.
Can the LTC3417AEFE-1#PBF operate with only one channel enabled?
Yes, the LTC3417AEFE-1#PBF supports independent channel control: pulling RUN1 low disables CH1 (1.5A) while keeping CH2 active, and vice versa. In half-active mode, total quiescent current drops to 260–400μA - a specification explicitly listed in the Electrical Characteristics table under "Half Active Mode".
LTC3417AEFE-1#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-1#PBF FAQ
1.How can I place an order for LTC3417AEFE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AEFE-1#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-1#PBF reliable?
The price and inventory of LTC3417AEFE-1#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-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3417AEFE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AEFE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AEFE-1#PBF?
LTC3417AEFE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AEFE-1#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-1#PBF?
For technical support, including LTC3417AEFE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AEFE-1#PBF requirements.
6.How does Aetrix verify that LTC3417AEFE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AEFE-1#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-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3417AEFE-1#PBF?
All LTC3417AEFE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AEFE-1#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-1#PBF part is unused and in its original packaging.
Return procedure for LTC3417AEFE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3417AEFE-1#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…
