My Inquiry
My Account
Analog Devices Inc. LTC3417AEFE-2#TRPBF
- Part No.:
- LTC3417AEFE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3417AEFE-2#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A/1.5A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,460
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3417AEFE-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 and delivering adjustable 0.8V–5V outputs. It features programmable switching frequency (0.6–4MHz), internal low-RDS(ON) MOSFETs, Burst Mode™ operation for <125μA quiescent current, and phase-selectable out-of-phase operation to reduce input RMS current. It is used in GPS navigation systems and automotive instrumentation where compact, efficient dual-rail power delivery is required.
For engineers reviewing the LTC3417AEFE-2#TRPBF datasheet, LTC3417AEFE-2#TRPBF pinout, LTC3417AEFE-2#TRPBF application, or LTC3417AEFE-2#TRPBF equivalent, key selection criteria include guaranteed 1.5A/1A output current capability, 0.8V feedback reference accuracy (±2%), 100μA dropout quiescent current, 1.5MHz default frequency (or resistor-programmable), and TSSOP-20 package thermal performance (θJA = 38°C/W).
Technical Context
The LTC3417AEFE-2#TRPBF employs a constant-frequency current-mode control architecture shared across both channels, with independent error amplifiers, ITH compensation nodes, and RUN enable inputs. Its PHASE pin selects in-phase or 180° out-of-phase switching between channels to minimize input capacitor stress.
Mode selection is unified via the SYNC/MODE pin: high logic enables Burst Mode™ (low IQ), low logic enables Pulse Skip mode (low ripple), and mid-level enables forced continuous conduction. The FREQ pin supports either internal 1.5MHz operation or external resistor programming (0.6–4MHz), with oscillator stability verified over –40°C to +85°C.
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 system rails without pre-regulation. |
| Output Current (Ch1/Ch2) | 1.5A / 1A minimum - guarantees full load capability under worst-case thermal conditions in TSSOP-20 package. |
| Feedback Reference Voltage | 0.800V ±2% - enables precise output regulation with standard resistor dividers; supports 0.8V–5V adjustment range. |
| Quiescent Current (Active) | 400–600μA - ensures high light-load efficiency while maintaining fast transient response in active mode. |
| Switch RDS(ON) (Top/Bottom) | 0.088Ω / 0.084Ω (Ch1), 0.16Ω / 0.15Ω (Ch2) at 3.6V - reduces conduction loss and improves full-load efficiency up to 95%. |
| Shutdown Current | <1μA - extends battery life in always-on systems by minimizing leakage during deep sleep. |
| Thermal Resistance θJA | 38°C/W - measured for TSSOP-20 package with exposed pad soldered; enables 1.5A/1A operation at +85°C ambient. |
Pinout & Package
Package: 20-Lead Plastic TSSOP with exposed thermal pad (Pin 21 = PGND2/GNDD), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN1 (Pin 2) | Enable input for 1.5A channel | Logic-high (>0.85V) activates Channel 1; 0V disables it and places regulator in sleep mode. |
| VIN1 (Pin 3) | Input supply for Ch1 P-channel switch | Connects directly to input rail; powers high-side MOSFET and associated gate drive circuitry for Channel 1. |
| ITH1 (Pin 4) | Error amplifier output / current limit control | Controls peak inductor current; voltage range 0–1.5V sets current comparator threshold for Ch1. |
| VFB1 (Pin 5) | Feedback input for Ch1 | Monitors resistive divider output; regulates VOUT1 to 0.8V reference with ±2% accuracy. |
| VFB2 (Pin 6) | Feedback input for Ch2 | Monitors resistive divider output; regulates VOUT2 to same 0.8V reference with independent loop control. |
| ITH2 (Pin 7) | Error amplifier output / current limit control | Same function as ITH1 but for Channel 2; enables independent compensation and current limiting. |
| RUN2 (Pin 8) | Enable input for 1A channel | Independent enable allows asymmetric power sequencing or dynamic channel disable for power optimization. |
| VIN2 (Pin 9) | Input supply for Ch2 P-channel switch & analog core | Primary power for Channel 2 and internal analog circuitry; must be connected to same or separate input rail. |
| SYNC/MODE (Pin 12) | Mode selection & external clock sync | Selects Burst Mode™ (VIN–0.5V), Pulse Skip (0.5V), or Forced Continuous (VIN/2); also accepts external clock. |
| SW2 (Pin 13) | Switch node for Ch2 | Connects to Ch2 inductor; swings between VIN2 and PGND2; requires low-inductance layout for EMI control. |
| PGOOD (Pin 14) | Power-good open-drain output | Pulls low if either VOUT deviates >6% from target; remains valid even when one channel is disabled. |
| FREQ (Pin 15) | Oscillator frequency control | Short to VIN → 1.5MHz; resistor to GND → 0.6–4MHz; sets timing ramp current for internal oscillator. |
| GNDA (Pin 16) | Analog ground reference | Separate ground for precision analog blocks (error amps, references); must be routed away from noisy digital paths. |
| PHASE (Pin 17) | Channel phase relationship control | High = in-phase switching; 0V = 180° out-of-phase; reduces input capacitor RMS current by ~30% in out-of-phase mode. |
| SW1 (Pin 18) | Switch node for Ch1 | Connects to Ch1 inductor; swings between VIN1 and PGND1; critical for thermal and EMI performance. |
| PGND1 (Pin 19) | Power ground for Ch1 N-channel driver | Low-impedance return path for Ch1 synchronous rectifier; must connect to PCB ground plane under exposed pad. |
| PGND2/GNDD (Pins 1,10,11,20) | Power/digital ground for Ch2 & logic | Multiple pins reduce ground impedance; exposed pad (Pin 21) must be soldered to PCB ground for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode™ operation | Reduces quiescent current to 125μA while maintaining regulated output, extending battery runtime in portable GPS devices. |
| 180° out-of-phase switching | Lowers input capacitor RMS current by ~25–30%, enabling smaller ceramic input capacitors and reduced board area. |
| Internal 0.084Ω/0.088Ω (Ch1) and 0.15Ω/0.16Ω (Ch2) MOSFETs | Eliminates need for external Schottky diodes and reduces BOM count, PCB footprint, and conduction losses. |
| Individual RUN pin control per channel | Enables flexible power sequencing, dynamic load shedding, and asymmetric rail management in multi-voltage systems. |
| Power Good (PGOOD) with dual-rail monitoring | Single open-drain output asserts only when both enabled outputs are within ±6% regulation - simplifies system supervision. |
Applications
| GPS/Navigation Systems | Automotive Instrumentation |
|---|---|
|
Use Scenario: Powering RF front-end (1.8V) and baseband processor (2.5V) in compact automotive GPS modules. IC Role / Device Role / Timing Role: Dual-output buck regulator providing tightly regulated, low-noise rails with independent enable control and phase optimization. Use Value: Out-of-phase operation reduces input ripple, easing EMI filtering; Burst Mode™ extends battery life during vehicle-off tracking. |
Use Scenario: Supplying display controller (3.3V) and microcontroller core (1.2V) in digital instrument clusters. IC Role / Device Role / Timing Role: High-efficiency dual-buck converter with robust undervoltage lockout (2.07V) and automotive-grade temperature range. Use Value: 100μA dropout quiescent current maintains memory backup during cold-crank; PGOOD monitors both rails for fail-safe diagnostics. |
| PC Cards | Industrial Point-of-Load |
|
Use Scenario: Generating 1.5V and 3.3V from 5V PCMCIA slot for embedded wireless modems. IC Role / Device Role / Timing Role: Compact dual-buck regulator in TSSOP-20 enabling minimal footprint on space-constrained add-in cards. Use Value: Resistor-programmable 0.6–4MHz frequency allows optimization for size (high-freq) or efficiency (low-freq) per card design. |
Use Scenario: Providing isolated 1.8V FPGA core and 2.5V I/O rails in factory automation controllers. IC Role / Device Role / Timing Role: Industrial-grade dual buck with –40°C to +85°C rating, short-circuit protection, and stable operation under wide input transients. Use Value: Independent RUN pins allow FPGA configuration sequencing; low RDS(ON) minimizes thermal rise in sealed enclosures. |
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 resistor-programmable frequency; higher 2.5A/1.8A current rating; requires external compensation. | Best suited for fixed-rail industrial PLCs where output voltages are invariant and higher current is needed. | Select when fixed outputs and higher current outweigh need for adjustable frequency and lower quiescent current. |
| ISL8026IRZ-T7A | 1.8A/1.4A rating; 3MHz max frequency; no Burst Mode™; 25μA shutdown current; requires external MOSFETs. | Ideal for high-frequency, low-profile designs where external FETs allow thermal separation and custom RDS(ON) optimization. | Choose when design prioritizes 3MHz switching and discrete FET flexibility over integrated efficiency and ultra-low IQ. |
Compared with TPS65270RGET and ISL8026IRZ-T7A, the LTC3417AEFE-2#TRPBF offers superior light-load efficiency via Burst Mode™, finer output voltage adjustability (0.8–5V), and integrated MOSFETs with lower RDS(ON), making it optimal for battery-powered and thermally constrained dual-rail applications.
Availability
LTC3417AEFE-2#TRPBF 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, extended temperature operation, and dual-rail efficiency optimization.
Supply support for LTC3417AEFE-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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving aerospace, automotive, industrial, and communications markets.
The LTC3417A-2 product line delivers dual-channel, high-efficiency synchronous buck regulators optimized for space-constrained, battery-sensitive applications requiring independent rail control, low IQ, and robust thermal performance in TSSOP and DFN packages.
FAQ
What is the maximum supported switching frequency for LTC3417AEFE-2#TRPBF?
The LTC3417AEFE-2#TRPBF supports a maximum switching frequency of 4MHz when configured with an external resistor from the FREQ pin to ground. At this frequency, the device maintains stable current-mode operation and delivers full 1.5A/1A output capability with appropriate inductor and capacitor selection. The internal oscillator defaults to 1.5MHz when FREQ is tied to VIN.
Does LTC3417AEFE-2#TRPBF require external Schottky diodes?
No, the LTC3417AEFE-2#TRPBF does not require external Schottky diodes. It integrates synchronous P-channel and N-channel MOSFETs for both channels, eliminating body-diode conduction losses and enabling high efficiency across the full load range. This integration reduces BOM count, PCB area, and thermal complexity compared to asynchronous buck designs.
How does the PHASE pin affect input capacitor stress in LTC3417AEFE-2#TRPBF?
When the PHASE pin is pulled low (0V), the LTC3417AEFE-2#TRPBF operates its two channels 180° out-of-phase, reducing input RMS current by approximately 25–30% compared to in-phase operation. This directly lowers stress on the input capacitor, allowing use of smaller ceramic capacitors and improving reliability in high-reliability automotive and industrial applications.
What is the feedback reference voltage accuracy of LTC3417AEFE-2#TRPBF over temperature?
The LTC3417AEFE-2#TRPBF specifies a feedback reference voltage of 0.800V with ±2% tolerance over the full –40°C to +85°C operating temperature range. This accuracy is guaranteed by design and characterization, enabling precise output regulation without trimming, even under thermal cycling in automotive and industrial environments.
Can LTC3417AEFE-2#TRPBF operate with only one channel enabled?
Yes, the LTC3417AEFE-2#TRPBF supports independent channel operation: pulling RUN1 low disables Channel 1 while Channel 2 remains fully functional, and vice versa. In single-channel mode, total quiescent current drops to 260–400μA, and the enabled channel retains full 1.5A or 1A output capability, enabling flexible power management in dynamically scaled systems.
LTC3417AEFE-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3417AEFE-2#TRPBF FAQ
1.How can I place an order for LTC3417AEFE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AEFE-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 LTC3417AEFE-2#TRPBF reliable?
The price and inventory of LTC3417AEFE-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 LTC3417AEFE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3417AEFE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AEFE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AEFE-2#TRPBF?
LTC3417AEFE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AEFE-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 LTC3417AEFE-2#TRPBF?
For technical support, including LTC3417AEFE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AEFE-2#TRPBF requirements.
6.How does Aetrix verify that LTC3417AEFE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AEFE-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 LTC3417AEFE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3417AEFE-2#TRPBF?
All LTC3417AEFE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AEFE-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 LTC3417AEFE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3417AEFE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3417AEFE-2#TRPBF 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…
