My Inquiry
My Account
Analog Devices Inc. LTC3604EUD#TRPBF
- Part No.:
- LTC3604EUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC3604EUD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,686
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3604EUD#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC regulator delivering up to 2.5A output current with 3.6V–15V input range, 0.6V reference, and programmable 800kHz–4MHz switching frequency in a 3mm × 3mm QFN-16 package. It supports Burst Mode® operation (300µA no-load IQ) and forced continuous mode for low-noise applications such as point-of-load power in battery-powered instrumentation.
For engineers reviewing the LTC3604EUD#TRPBF datasheet, LTC3604EUD#TRPBF pinout, LTC3604EUD#TRPBF application, or LTC3604EUD#TRPBF equivalent, key selection criteria include its controlled on-time current-mode architecture, ±8% PGOOD threshold, 20ns minimum on-time, 130mΩ top switch RDS(ON), and external frequency synchronization capability - all critical for high-efficiency, fast-transient, space-constrained power designs.
Technical Context
The LTC3604EUD#TRPBF employs a phase-lockable controlled on-time, current-mode architecture with internal PLL alignment of top-FET on-time to internal or external clock edges. This enables stable high-frequency operation (up to 4MHz) even at very low duty cycles (5% at 2.25MHz), making it suitable for high step-down ratio applications like 12V-to-1.8V conversion.
It integrates dual MOSFETs (130mΩ top / 100mΩ bottom), a 3.3V INTVCC regulator, and analog circuitry supporting soft-start, output tracking, and valley-current limiting (2.6A–4.3A). Operation modes are selected via MODE/SYNC pin: floating or tied to INTVCC enables Burst Mode®; grounded forces continuous conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6V to 15V - supports wide-input industrial and Li-ion battery systems without pre-regulation |
| Max Output Current | 2.5A - sufficient for FPGA core rails, microprocessor I/O, and ASIC point-of-load supplies |
| Switching Frequency | 800kHz to 4MHz - adjustable via RT resistor; enables compact magnetics and noise-sensitive layout control |
| Efficiency | Up to 95% - achieved at mid-load with optimized inductor and ceramic capacitors |
| No-Load Quiescent Current | 300µA in Burst Mode® - extends battery life in standby or low-duty-cycle portable instruments |
| Reference Voltage | 0.600V ±6mV - enables precise low-voltage outputs (e.g., 0.8V, 1.2V) using standard resistor dividers |
| Power Good Threshold | ±8% FB window for PGOOD assertion - provides reliable system-level power sequencing and fault detection |
Pinout & Package
Package: 16-pin (3mm × 3mm) plastic QFN with exposed PGND pad (Pin 17), θJA = 45°C/W. Requires soldering of exposed pad to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC (1) | Mode select & sync input | Ground = forced continuous; float/INTVCC = Burst Mode®; external clock = synchronized forced continuous |
| PGOOD (2) | Open-drain status output | Pulled low when FB deviates >±8% from 0.6V; high-impedance when within ±5% - used for power sequencing |
| SW (3,4) | Switch node | Connects to inductor; swings from PGND to VIN - defines power path and requires low-inductance routing |
| BOOST (6) | Floating gate drive supply | Connects (+) of bootstrap capacitor; enables high-side MOSFET drive above VIN |
| INTVCC (7) | Internal 3.3V regulator output | Must be decoupled with ≥1µF ceramic to SGND - powers internal logic and gate drivers |
| VON (8) | On-time voltage input | Connected to VOUT to make on-time proportional to output voltage - stabilizes regulation across line/load |
| SGND (9) | Signal ground reference | Low-noise return for FB, RT, ITH, TRACK/SS - separate from PGND to minimize noise coupling |
| RT (10) | Oscillator programming | Resistor to SGND sets fSW; 160kΩ = ~2MHz - determines inductor size and efficiency trade-off |
| FB (11) | Feedback input | Compares divider voltage to 0.6V reference - sets output voltage accuracy and loop stability |
| ITH (12) | Error amplifier output | Loop compensation node - connects to RC network or INTVCC for internal compensation |
| TRACK/SS (13) | Tracking & soft-start | Voltage <0.6V overrides reference for sequencing; capacitor to GND enables controlled startup ramp |
| RUN (14) | Enable input | High >1.25V enables regulation; low <1.0V shuts down - prevents unintended operation if left floating |
| VIN (15,16) | Main power input | 3.6V–15V supply; requires ≥10µF low-ESR ceramic bypass to PGND near pins |
| PGND (17) | Power ground | Exposed pad - must be soldered to large copper area for thermal dissipation and low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Controlled on-time current-mode architecture | Enables constant-frequency operation with fast transient response and stable light-load performance |
| Burst Mode® operation | Reduces no-load IQ to 300µA while maintaining regulation - critical for battery runtime in intermittent-use devices |
| External frequency synchronization | Accepts 800kHz–4MHz clock on MODE/SYNC to eliminate beat frequencies in multi-rail systems |
| Output voltage tracking | TRACK/SS pin allows coordinated startup/shutdown with other regulators - essential for multi-voltage SoC sequencing |
| Integrated power MOSFETs | 130mΩ top / 100mΩ bottom switches eliminate external FETs and reduce BOM count and layout complexity |
| Short-circuit foldback protection | Reduces valley current limit to ~1.3A during output short - limits power dissipation and protects input source |
Applications
| Distributed Power Systems | Lithium-Ion Battery-Powered Instruments |
|---|---|
Use Scenario: Local 3.3V or 1.8V rail generation from 12V backplane in telecom or industrial rack systems. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, regulated DC power to downstream modules. Use Value: High efficiency (>90% at 1A) reduces heat buildup in dense chassis; 4MHz capability minimizes filter component footprint. |
Use Scenario: Core power supply for handheld test equipment powered by single-cell Li-ion (3.0V–4.2V). IC Role / Device Role / Timing Role: Main buck converter regulating processor, ADC, and display interface voltages. Use Value: Burst Mode® extends battery life during idle; 20ns min on-time supports 3.3V→1.2V conversion at full input range. |
| Point-of-Load Power Supplies | Medical Portable Diagnostic Devices |
Use Scenario: Dedicated 1.2V/2A supply adjacent to FPGA or ASIC on high-speed digital board. IC Role / Device Role / Timing Role: Local DC/DC regulator minimizing IR drop and noise coupling from main supply. Use Value: Forced continuous mode ensures ultra-low output ripple (<20mVP-P) for sensitive analog/digital mixed-signal circuits. |
Use Scenario: Power management in portable ultrasound or ECG units requiring low EMI and long battery operation. IC Role / Device Role / Timing Role: Primary power converter enabling quiet analog front-end operation and low standby consumption. Use Value: Synchronization capability eliminates switching noise in RF/analog bands; PGOOD output validates rail integrity before sensor activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610ACUDD#TRPBF | Higher input range (3V–42V), lower IQ (2.5µA), but fixed 2MHz fSW; no TRACK/SS or VON pin | Better for automotive or wide-input industrial use; lacks output tracking for complex sequencing | Select when ultra-low quiescent current and high input voltage tolerance are prioritized over programmability and sequencing features |
| TPS54202DRCT | Lower max current (2A), integrated compensation, no external sync; 4.5V–17V input; 500kHz–2.2MHz fSW | Suitable for cost-sensitive consumer electronics; lacks PGOOD and precise tracking capability | Choose for simpler, lower-cost designs where 2A output and basic enable/PGOOD suffice without advanced sequencing |
Compared with LT8610ACUDD#TRPBF and TPS54202DRCT, the LTC3604EUD#TRPBF offers unique value in programmable frequency, output tracking, and Burst Mode® efficiency optimization - making it preferred for portable instrumentation and multi-rail systems requiring precise power sequencing and thermal management in compact layouts.
Availability
LTC3604EUD#TRPBF is available at Aetrix Electronics and suitable for distributed power systems, lithium-ion battery-powered instruments, and point-of-load power supplies requiring stable component supply, consistent parametric performance, and long-term production availability.
Supply support for LTC3604EUD#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 and maintains its high-performance power management portfolio with rigorous reliability testing and automotive-grade qualification paths.
The LTC3604EUD#TRPBF belongs to Linear's monolithic synchronous buck regulator product line, designed specifically for high-efficiency, high-density point-of-load conversion in portable, instrumentation, and industrial applications demanding precision regulation and low-noise operation.
FAQ
What is the maximum operating junction temperature for the LTC3604EUD#TRPBF?
The LTC3604EUD#TRPBF has a maximum operating junction temperature of 125°C, with thermal resistance θJA = 45°C/W in its 3mm × 3mm QFN package. The exposed PGND pad must be soldered to PCB copper to achieve this rating; insufficient thermal land area will cause derating. Internal overtemperature protection activates above 125°C but is intended only for momentary overload conditions.
Does the LTC3604EUD#TRPBF support output voltage tracking, and how is it implemented?
Yes, the LTC3604EUD#TRPBF supports output voltage tracking via the TRACK/SS pin (Pin 13). Applying a voltage below 0.6V to this pin overrides the internal reference, causing the FB pin to servo to that voltage. This enables coordinated startup with other regulators. An external capacitor from TRACK/SS to ground provides soft-start functionality, with typical ramp time of 400–700µs for VFB to reach 90% of final value.
How does the MODE/SYNC pin affect operation of the LTC3604EUD#TRPBF?
The MODE/SYNC pin (Pin 1) controls both operational mode and synchronization. When grounded, the LTC3604EUD#TRPBF operates in forced continuous conduction mode. When floating or tied to INTVCC, it enters Burst Mode® for high light-load efficiency. When driven by an external 800kHz–4MHz clock, the internal PLL synchronizes switching to that clock and defaults to forced continuous mode - eliminating beat frequencies in multi-converter systems.
What is the minimum on-time specification for the LTC3604EUD#TRPBF, and why does it matter?
The LTC3604EUD#TRPBF has a minimum on-time of 20ns (typical) at VON = 1V and VIN = 4V. This spec enables high step-down ratios at high frequencies - for example, generating 1.2V from 12V at 2.25MHz requires only ~5% duty cycle, which the 20ns min on-time supports reliably. Without this capability, achieving such conversions would require lower fSW or cascaded regulation, increasing solution size and cost.
Can the LTC3604EUD#TRPBF be used in applications requiring a 0.8V output voltage?
Yes, the LTC3604EUD#TRPBF can deliver 0.8V output using the 0.6V internal reference. A resistor divider from VOUT to FB sets the feedback ratio: R1/R2 = (VOUT – 0.6V)/0.6V. For 0.8V, R1/R2 ≈ 0.333, e.g., R1 = 100kΩ, R2 = 300kΩ. Layout best practices - including tight FB trace routing away from noisy nodes and Kelvin connection of R2 to SGND - ensure accuracy and stability at low output voltages.
LTC3604EUD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.6V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 14.52V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 2MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC3604EUD#TRPBF FAQ
1.How can I place an order for LTC3604EUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3604EUD#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 LTC3604EUD#TRPBF reliable?
The price and inventory of LTC3604EUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3604EUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3604EUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3604EUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3604EUD#TRPBF?
LTC3604EUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3604EUD#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 LTC3604EUD#TRPBF?
For technical support, including LTC3604EUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3604EUD#TRPBF requirements.
6.How does Aetrix verify that LTC3604EUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3604EUD#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 LTC3604EUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3604EUD#TRPBF?
All LTC3604EUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3604EUD#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 LTC3604EUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3604EUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3604EUD#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…
