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Analog Devices Inc. LTC3417AIDHC-2#TRPBF
- Part No.:
- LTC3417AIDHC-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AIDHC-2#TRPBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
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Product details
Overview
LTC3417AIDHC-2#TRPBF from Analog Devices (formerly Linear Technology) is a dual synchronous step-down DC/DC regulator with 1.5A and 1A output capability, operating at up to 4MHz switching frequency across a 2.25V–5.5V input range. It delivers adjustable output voltages from 0.8V to 5V per channel, features internal low-RDS(ON) MOSFETs (0.088Ω top/0.084Ω bottom for CH1; 0.16Ω/0.15Ω for CH2), and supports Burst Mode™ operation for <125μA quiescent current in light-load sleep-enabling high-efficiency power conversion in space-constrained GPS and automotive instrumentation systems.
For engineers reviewing the LTC3417AIDHC-2#TRPBF datasheet, LTC3417AIDHC-2#TRPBF pinout, LTC3417AIDHC-2#TRPBF application, or LTC3417AIDHC-2#TRPBF equivalent, key selection criteria include its dual-channel phase-selectable architecture (in-phase or 180° out-of-phase), programmable 0.6–4MHz frequency via external resistor, ±0.2% feedback reference accuracy (0.784–0.816V), 100μA total shutdown current, and thermally enhanced 16-lead 3mm × 5mm DFN package rated for –40°C to +125°C operation.
Technical Context
The LTC3417AIDHC-2#TRPBF employs a constant-frequency current-mode control architecture shared across both channels, with independent error amplifiers (transconductance 1400μS), peak-current limiting (2.1–2.5A on CH1, 1.4–1.7A on CH2), and synchronized soft-start (1024-cycle ramp). Its dual-mode operation-Burst Mode™ for ultralow IQ (125μA) or Pulse Skip for low-noise regulation-is selected via the SYNC/MODE pin voltage threshold (0.5V low, VIN–0.5V high, VIN/2 forced continuous).
Phase relationship between channels is controlled by the PHASE pin (logic-high = in-phase, 0V = 180° out-of-phase), reducing input RMS current stress during out-of-phase operation. Dropout is supported via 100% duty cycle with P-channel MOSFETs fully on, while undervoltage lockout (1.95–2.25V) prevents unstable startup below nominal input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and industrial 3.3V/5V 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 0.6–4MHz - allows optimization of inductor size (≤2mm height) vs. efficiency |
| Feedback Reference Voltage | 0.8V ±2% - sets precise output regulation point with minimal external divider error sensitivity |
| Quiescent Current (Sleep) | 125μA - extends battery life in always-on GPS/navigation modules |
| Shutdown Current | <1μA - meets stringent system-level standby power budgets |
| Efficiency (Peak) | Up to 95% - achieved using integrated synchronous rectification, eliminating Schottky losses |
Pinout & Package
Package: 16-lead (3mm × 5mm) plastic DFN with exposed thermal pad (Pin 17 = PGND2/GNDD), rated for –40°C to +125°C junction temperature (θJA = 43°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (16) | N-channel driver ground for CH1 | Provides low-impedance return path for SW1 current; must be connected to local power ground plane |
| SW1 (15) | CH1 switch node | Connects to inductor L1; swings between VIN1 and PGND1; requires tight layout to minimize EMI |
| PHASE (14) | Channel phase select | Logic-high = CH1/CH2 in-phase; 0V = 180° out-of-phase - reduces input capacitor RMS current |
| GNDA (13) | Analog ground | Separate ground for internal reference and error amplifiers; must tie to quiet analog ground region |
| FREQ (12) | Frequency set input | VIN = 1.5MHz; resistor-to-ground sets 0.6–4MHz - enables compact magnetics selection |
| PGOOD (11) | Power-good open-drain output | Pulled low if either VOUT deviates >6% from target - used for system power sequencing and fault reporting |
| SW2 (10) | CH2 switch node | Connects to inductor L2; swings between VIN2 and PGND2; shares same layout constraints as SW1 |
| SYNC/MODE (9) | Mode control & clock sync | Selects Burst Mode™ (high), Pulse Skip (low), or Forced Continuous (mid); also accepts external clock |
| RUN1 (1) | CH1 enable | Logic-high enables 1.5A regulator; both RUN1/RUN2 low = full shutdown (<1μA) |
| VIN1 (2) | CH1 input supply | Power source for CH1 P-channel MOSFET and gate drive - separate from VIN2 for rail isolation |
| ITH1 (3) | CH1 error amp compensation | 0–1.5V control voltage sets peak inductor current limit - used for loop stability compensation |
| VFB1 (4) | CH1 feedback input | Monitors resistive divider output; regulates to 0.8V reference - determines final VOUT1 accuracy |
| VFB2 (5) | CH2 feedback input | Same function as VFB1 for 1A channel - enables independent output voltage programming |
| ITH2 (6) | CH2 error amp compensation | 0–1.5V control voltage for CH2 current limit - decoupled from CH1 for independent loop tuning |
| RUN2 (7) | CH2 enable | Logic-high enables 1A regulator - allows staggered startup or dynamic channel disable |
| VIN2 (8) | CH2 input supply & analog bias | Supplies CH2 P-MOSFET and internal analog circuitry - may be tied to VIN1 or isolated |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel phase synchronization | 180° out-of-phase operation reduces input capacitor RMS current by ~25%, lowering stress and required capacitance |
| Three selectable light-load modes | Burst Mode™ (125μA IQ), Pulse Skip (low ripple), or Forced Continuous (fixed-frequency noise filtering) - configurable per system noise/efficiency tradeoff |
| Integrated low-RDS(ON) switches | 0.088Ω/0.084Ω (CH1) and 0.16Ω/0.15Ω (CH2) MOSFETs eliminate external Schottky diodes and reduce conduction loss |
| Independent run-control and soft-start | RUN1/RUN2 pins allow individual channel enable/disable; internal 1024-cycle soft-start prevents inrush current on power-up |
| Robust protection suite | Short-circuit protection, undervoltage lockout (1.95–2.25V), and thermal shutdown ensure reliable operation under fault conditions |
Applications
| GPS/Navigation Systems | Automotive Instrumentation |
|---|---|
Use Scenario: Compact handheld or embedded GPS receivers requiring dual regulated rails (e.g., 1.8V RF core + 2.5V baseband) from single Li-ion cell. IC Role / Device Role / Timing Role: Dual-output step-down regulator delivering stable, low-noise power with Burst Mode™ extending battery runtime. Use Value: 95% peak efficiency and 125μA sleep current enable >24-hour operation on 1000mAh battery; 4MHz operation allows use of 1.5μH/2.2μH inductors ≤2mm height. | Use Scenario: Digital dashboard cluster with microcontroller, display driver, and CAN transceiver needing isolated 3.3V and 5V supplies. IC Role / Device Role / Timing Role: Dual synchronous buck converter providing independently enabled, phase-controlled outputs to minimize input ripple and EMI. Use Value: Out-of-phase operation cuts input capacitor RMS current by ~25%, reducing 10μF ceramic size/cost; –40°C to +125°C rating ensures reliability in under-hood environments. |
| PC Cards | Industrial Power Supplies |
Use Scenario: ExpressCard or PCMCIA peripheral with FPGA, memory, and interface logic demanding tightly regulated 1.2V and 3.3V rails. IC Role / Device Role / Timing Role: Dual buck regulator with programmable frequency (0.6–4MHz) and independent RUN pins enabling dynamic power gating. Use Value: 0.8V feedback reference enables accurate low-voltage regulation; 16-pin DFN footprint saves board area versus discrete solutions. | Use Scenario: Programmable logic controller (PLC) I/O module requiring robust 5V and 3.3V supplies from 12–24V industrial bus. IC Role / Device Role / Timing Role: High-efficiency dual buck stage accepting wide-input pre-regulator output, with PGOOD signaling for system health monitoring. Use Value: 2.25V min input supports brownout tolerance; short-circuit and thermal protection prevent field failures in unattended operation. |
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 1.2MHz frequency; 2A/1.5A output; no Burst Mode™; requires external compensation | Higher current but less flexible frequency/light-load optimization; lacks phase control | Prefer when higher output current and simpler design outweigh need for ultra-low IQ or phase management |
| ISL85412IRZ-T7A | 1.5A/1.5A outputs; 300kHz–2.2MHz programmable frequency; 25μA IQ in deep-sleep mode | Lower max frequency limits inductor miniaturization; deeper sleep mode but no Burst Mode™ noise suppression | Prefer when symmetrical current capability and lowest possible standby power are critical over ripple performance |
Compared with TPS65270RGET and ISL85412IRZ-T7A, the LTC3417AIDHC-2#TRPBF offers superior light-load efficiency via Burst Mode™, precise 0.8V reference accuracy, and 180° phase control for input ripple reduction-making it optimal for battery-powered, space-constrained, and noise-sensitive dual-rail applications.
Availability
LTC3417AIDHC-2#TRPBF is available at Aetrix Electronics and suitable for GPS navigation systems, automotive instrumentation clusters, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3417AIDHC-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 ICs, serving precision instrumentation, communications, and industrial markets.
The LTC3417A series was designed specifically for medium-power, dual-output point-of-load regulation in portable and automotive systems where efficiency, small size, and thermal performance are critical.
FAQ
What is the maximum switching frequency supported by the LTC3417AIDHC-2#TRPBF?
The LTC3417AIDHC-2#TRPBF supports a maximum switching frequency of 4MHz when configured with an external resistor on the FREQ pin. At this frequency, the device enables use of ultra-compact inductors (≤2mm height) and ceramic capacitors, ideal for space-constrained designs like GPS modules. Operation above 4MHz is not specified or guaranteed.
Does the LTC3417AIDHC-2#TRPBF require external Schottky diodes?
No, the LTC3417AIDHC-2#TRPBF does not require external Schottky diodes. It integrates synchronous rectification with low-RDS(ON) N-channel MOSFETs (0.084Ω CH1, 0.15Ω CH2) as bottom switches, eliminating conduction losses and thermal overhead associated with discrete diodes-directly improving efficiency and simplifying layout.
How does the PHASE pin affect input capacitor stress in the LTC3417AIDHC-2#TRPBF?
When the PHASE pin is driven low (0V), the LTC3417AIDHC-2#TRPBF operates CH2 180° out-of-phase with CH1, reducing input RMS current by up to ~25% compared to in-phase operation. This directly lowers stress on the input capacitor, allowing smaller ceramic values (e.g., 10μF instead of 22μF) and extending capacitor lifetime in high-reliability applications.
What is the feedback reference voltage tolerance for the LTC3417AIDHC-2#TRPBF?
The LTC3417AIDHC-2#TRPBF has a feedback reference voltage of 0.8V with a tolerance of ±2% (0.784V to 0.816V) over the full –40°C to +125°C temperature range. This tight tolerance ensures accurate output voltage regulation across environmental extremes, critical for powering sensitive analog and RF circuitry in automotive and navigation systems.
Can the LTC3417AIDHC-2#TRPBF operate with only one channel enabled?
Yes, the LTC3417AIDHC-2#TRPBF supports independent channel control via RUN1 and RUN2 pins. Driving RUN1 high and RUN2 low enables only the 1.5A channel, drawing just 260–400μA supply current (half-active mode), while maintaining full regulation on VOUT1. This capability enables dynamic power scaling in systems with variable load requirements.
LTC3417AIDHC-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN 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:
- 16-DFN (5x3)
LTC3417AIDHC-2#TRPBF FAQ
1.How can I place an order for LTC3417AIDHC-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AIDHC-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 LTC3417AIDHC-2#TRPBF reliable?
The price and inventory of LTC3417AIDHC-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 LTC3417AIDHC-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3417AIDHC-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AIDHC-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AIDHC-2#TRPBF?
LTC3417AIDHC-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AIDHC-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 LTC3417AIDHC-2#TRPBF?
For technical support, including LTC3417AIDHC-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AIDHC-2#TRPBF requirements.
6.How does Aetrix verify that LTC3417AIDHC-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AIDHC-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 LTC3417AIDHC-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3417AIDHC-2#TRPBF?
All LTC3417AIDHC-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AIDHC-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 LTC3417AIDHC-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3417AIDHC-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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