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Analog Devices Inc. LTC3417AEDHC#TRPBF
- Part No.:
- LTC3417AEDHC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3417AEDHC#TRPBF.pdf
- Description:
- IC REG BCK ADJ 1A/1.5A DL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
LTC3417AEDHC#TRPBF 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, and features independent RUN control, phase-selectable operation, and Burst Mode® for ultra-low quiescent current (125µA in sleep mode). It is used in compact battery-powered systems such as GPS modules and DSL modems.
For engineers reviewing the LTC3417AEDHC#TRPBF datasheet, LTC3417AEDHC#TRPBF pinout, LTC3417AEDHC#TRPBF application, or LTC3417AEDHC#TRPBF equivalent, key selection considerations include its dual-output current capability (1.5A/1A), 16-lead 3mm × 5mm DFN package with exposed thermal pad, selectable light-load modes (Burst/Pulse Skip/Forced Continuous), and precise 0.8V ±2% feedback reference voltage.
Technical Context
The LTC3417AEDHC#TRPBF employs a constant-frequency current-mode architecture with shared oscillator and independent error amplifiers per channel. Its dual synchronous buck topology uses internal P-channel and N-channel MOSFETs with RDS(ON) of 88mΩ/84mΩ (CH1) and 160mΩ/150mΩ (CH2) at 3.6V, enabling high efficiency without external diodes. The PHASE pin configures 0° or 180° channel synchronization to reduce input RMS current.
Operation is controlled via the SYNC/MODE pin, which selects Burst Mode® (high efficiency, ~125µA IQ), Pulse Skip (low ripple), or Forced Continuous (fixed-frequency noise). The FREQ pin sets oscillator frequency from 0.6MHz to 4MHz using an external resistor or fixes it at 1.5MHz when tied to VIN. Both channels feature individual soft-start, power-good monitoring, and dropout operation at 100% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion, USB, and regulated 3.3V/5V rails |
| Output Current Capability | CH1: 1.5A / CH2: 1A - guaranteed minimum output with internal switch current limits of 2.5A and 1.7A |
| Switching Frequency | 0.6MHz to 4MHz - adjustable via external resistor on FREQ pin; enables use of sub-2mm-height inductors |
| Feedback Reference Voltage | 0.8V ±2% - sets output voltage via external resistor divider; enables 0.8V–5V adjustable range per channel |
| Quiescent Current | 125µA in Sleep Mode - extends battery life in always-on portable devices |
| Shutdown Current | <1µA - ensures near-zero power draw during system standby |
| Efficiency Peak | Up to 95% - achieved with low RDS(ON) internal switches and synchronous rectification |
Pinout & Package
Package: 16-lead (3mm × 5mm) plastic DFN with exposed thermal pad (Pin 17 = PGND2/GNDD), rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1 (Pin 16) | Power Ground for CH1 Switch | Return path for SW1 N-channel driver; must be low-inductance connection to PCB ground plane |
| SW1 (Pin 15) | CH1 Switch Node | Connects to inductor L1; swings between VIN1 and PGND1; requires tight layout to minimize EMI |
| PHASE (Pin 14) | Channel Phase Control Input | Logic-high (VIN) → in-phase; logic-low (GND) → 180° out-of-phase; reduces input capacitor RMS stress |
| GNDA (Pin 13) | Analog Ground | Reference for internal error amplifiers and comparators; separate from power grounds to avoid noise coupling |
| FREQ (Pin 12) | Oscillator Frequency Set | Tied to VIN → 1.5MHz; resistor-to-GND → 0.6–4MHz; sets timing ramp current for internal oscillator |
| PGOOD (Pin 11) | Power-Good Output | Open-drain signal pulled low if either VOUT deviates >±6% from regulation; shared status for both channels |
| SW2 (Pin 10) | CH2 Switch Node | Connects to inductor L2; swings between VIN2 and PGND2; shares layout constraints with SW1 |
| SYNC/MODE (Pin 9) | Mode Selection & Clock Sync | Voltage threshold selects Burst Mode® (VIN–0.5V), Pulse Skip (0.5V), or Forced Continuous (VIN/2); also accepts external clock |
| RUN1 (Pin 1) | CH1 Enable Input | Logic-high enables 1.5A regulator; logic-low disables CH1; both RUN1/RUN2 low → full shutdown (<1µA) |
| RUN2 (Pin 7) | CH2 Enable Input | Independent enable for 1A regulator; allows asymmetric power sequencing and dynamic channel control |
| VIN1 (Pin 2) | CH1 Power Input | Supplies P-channel switch of CH1; must be decoupled locally with low-ESR ceramic capacitor |
| VIN2 (Pin 8) | CH2 Power Input & Analog Supply | Supplies CH2 P-channel switch and internal analog circuitry; shared rail with GNDA reference |
| VFB1 (Pin 4) | CH1 Feedback Input | Monitors resistive divider output; regulates CH1 to 0.8V reference; ±0.1µA input bias minimizes divider error |
| VFB2 (Pin 5) | CH2 Feedback Input | Same function as VFB1 for CH2; enables independent output voltage programming (e.g., 1.8V + 2.5V) |
| ITH1 (Pin 3) | CH1 Error Amplifier Output | Controls peak inductor current via current comparator threshold; compensation network connects here |
| ITH2 (Pin 6) | CH2 Error Amplifier Output | Independent compensation node for CH2; allows tailored loop response per channel |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent RUN pins | Enables asymmetric power-up/down sequencing and dynamic channel disable for adaptive power management |
| 180° phase-selectable operation | Reduces input capacitor RMS current by up to 30% versus in-phase mode, lowering required capacitance and size |
| Burst Mode® operation | Delivers 125µA total quiescent current across both channels while maintaining regulation - critical for battery longevity |
| No external Schottky diodes required | Integrated synchronous MOSFETs eliminate conduction losses and thermal overhead of discrete diodes |
| Power Good (PGOOD) with dual-channel monitoring | Single open-drain output asserts low if either output falls >6% from target - simplifies system-level fault detection |
| 100% duty cycle dropout operation | Maintains regulation down to VIN ≈ VOUT + ILOAD × RDS(ON), extending usable battery voltage range |
Applications
| GPS Navigation Module | Digital Camera Core Logic |
|---|---|
Use Scenario: Compact handheld GPS unit requiring dual regulated supplies (1.8V for RF front-end, 2.5V for baseband processor) from single Li-ion cell. IC Role / Device Role / Timing Role: Dual-output synchronous buck regulator providing isolated, low-noise, sequenced power domains with minimal board area. Use Value: 4MHz programmability enables <2mm-height inductors; Burst Mode® extends battery runtime beyond 12 hours under typical usage. |
Use Scenario: High-resolution digital camera with image sensor, ISP, and memory interface needing tightly regulated, low-ripple 1.2V and 2.8V rails. IC Role / Device Role / Timing Role: Dual-channel DC/DC converter delivering independently controlled outputs with phase alignment to suppress input ripple. Use Value: 180° phase operation cuts input capacitor RMS current by ~25%, allowing smaller 10µF X5R ceramics instead of larger tantalums. |
| PC Card (PCMCIA) Interface | DSL Modem Baseband Processor |
Use Scenario: Hot-pluggable PC Card requiring fast, robust power sequencing and brown-out protection during insertion/removal. IC Role / Device Role / Timing Role: Dual-step-down regulator with independent RUN control and PGOOD monitoring for safe card initialization and reset coordination. Use Value: Individual soft-start (1024-cycle ramp) prevents inrush current; UVLO (2.07V) avoids unstable operation during marginal supply conditions. |
Use Scenario: Residential DSL modem with integrated PHY and microcontroller needing efficient, space-constrained dual-rail conversion from 3.3V or 5V adapter. IC Role / Device Role / Timing Role: Medium-power POL regulator supporting bursty data transmission loads with low-light-load efficiency. Use Value: Pulse Skip mode maintains <10mVpp output ripple at 10mA load - preserves signal integrity in analog front-end circuits. |
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; no Burst Mode®; higher IQ (250µA); supports 3A/2A outputs | Better for high-current, fixed-frequency designs where low-light-load efficiency is secondary | Select when higher output current and simpler frequency setup outweigh need for ultra-low IQ. |
| ISL91211AIRZ-T7A | Triple-output (3A/2A/2A); integrated PMIC sequencing; 2.5MHz fixed frequency; no phase control | Suitable for multi-rail SoC platforms requiring coordinated power-up but not phase optimization | Choose for complex SoC power trees where integration and sequencing trump dual-channel flexibility. |
Compared with TPS65270RGET and ISL91211AIRZ-T7A, the LTC3417AEDHC#TRPBF uniquely balances ultra-low quiescent current (125µA), 0.6–4MHz programmability, and 180° phase control - making it optimal for compact, battery-sensitive dual-rail systems where input capacitor size and runtime are critical.
Availability
LTC3417AEDHC#TRPBF is available at Aetrix Electronics and suitable for GPS navigation modules, DSL modems, and digital camera power subsystems requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3417AEDHC#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 precision instrumentation, communications, and industrial markets.
The LTC3417AEDHC#TRPBF belongs to Linear's high-efficiency monolithic DC/DC regulator product line, engineered specifically for space-constrained, battery-operated applications demanding dual independent outputs, ultra-low quiescent current, and flexible light-load operation.
FAQ
What is the maximum supported switching frequency for the LTC3417AEDHC#TRPBF?
The LTC3417AEDHC#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 very small inductors (≤2mm height) and ceramic capacitors, reducing solution footprint. Operation above 4MHz is not guaranteed due to internal timing constraints and minimum on-time limitations.
Does the LTC3417AEDHC#TRPBF require external Schottky diodes?
No, the LTC3417AEDHC#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 without additional components.
How does the PHASE pin affect input capacitor sizing in the LTC3417AEDHC#TRPBF?
When the PHASE pin is set low (0V), the LTC3417AEDHC#TRPBF operates its two channels 180° out-of-phase, reducing input RMS current by up to 30% compared to in-phase operation. This allows smaller input capacitors - for example, a single 10µF X5R ceramic may suffice instead of two 22µF units - lowering cost and board area.
What is the feedback reference voltage accuracy of the LTC3417AEDHC#TRPBF?
The LTC3417AEDHC#TRPBF has a feedback reference voltage of 0.8V with ±2% tolerance over temperature (–40°C to +85°C). This specification ensures accurate output voltage regulation across operating conditions and enables stable 0.8V–5V programmability using standard resistor dividers with ≤1% tolerance.
Can the LTC3417AEDHC#TRPBF operate with only one channel enabled?
Yes, the LTC3417AEDHC#TRPBF supports independent channel control: pulling RUN1 low disables only CH1 (1.5A), while RUN2 remains active for CH2 (1A), and vice versa. In half-active mode, total quiescent current drops to 260–400µA - useful for dynamic power scaling in multi-rail systems.
LTC3417AEDHC#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3417AEDHC#TRPBF FAQ
1.How can I place an order for LTC3417AEDHC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3417AEDHC#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 LTC3417AEDHC#TRPBF reliable?
The price and inventory of LTC3417AEDHC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3417AEDHC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3417AEDHC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3417AEDHC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3417AEDHC#TRPBF?
LTC3417AEDHC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3417AEDHC#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 LTC3417AEDHC#TRPBF?
For technical support, including LTC3417AEDHC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3417AEDHC#TRPBF requirements.
6.How does Aetrix verify that LTC3417AEDHC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3417AEDHC#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 LTC3417AEDHC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3417AEDHC#TRPBF?
All LTC3417AEDHC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3417AEDHC#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 LTC3417AEDHC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3417AEDHC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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