My Inquiry
My Account
Analog Devices Inc. LTC3615MPUF#TRPBF
- Part No.:
- LTC3615MPUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC3615MPUF#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3A DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,638
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3615MPUF#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, synchronous step-down DC/DC converter IC designed for high-efficiency point-of-load regulation. It delivers up to 3A per channel across a 2.25V–5.5V input range, supports 0.6V minimum output voltage with ±1% accuracy, operates up to 4MHz, and features selectable 0°/90°/180° inter-channel phase shift - ideal for portable computing and DDR memory termination in space-constrained industrial and aerospace systems.
For engineers reviewing the LTC3615MPUF#TRPBF datasheet, LTC3615MPUF#TRPBF pinout, LTC3615MPUF#TRPBF application, or LTC3615MPUF#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature rating, QFN-24 package thermal performance (θJA = 37°C/W), dual-channel current-mode control architecture, programmable slew rate limiting for EMI reduction, and support for Burst Mode® operation with 130µA no-load quiescent current.
Technical Context
The LTC3615MPUF#TRPBF implements a current-mode, constant-frequency control architecture with independent error amplifiers (ITH1/ITH2), internal 0.6V reference, and dual synchronous power stages (Pch top / Nch bottom MOSFETs). Its phase selector (PHASE pin) enables precise ripple cancellation via 0°/90°/180° channel alignment, while MODE pin programming selects among Burst Mode®, pulse-skipping, or forced continuous conduction - each with distinct ITH voltage thresholds and load-transient response profiles.
It integrates internal compensation (ITH tied to SVIN), external soft-start/tracking (TRACK/SS1/2), and active voltage positioning (AVP) capability. The RT/SYNC pin supports resistor-programmed frequency (400kHz–4MHz), external clock synchronization (up to 4MHz), or fixed 2.25MHz operation - all with automatic slope compensation adaptation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.25V to 5.5V - supports single-cell Li-ion and regulated 3.3V/5V rails without external LDO pre-regulation. |
| Output Current per Channel | 3A continuous - enables dual 3A PoL or combined 6A single-output configurations with phase interleaving. |
| Output Voltage Accuracy | ±1% over –55°C to 150°C - ensures stable core/DSP/DDR supply under extreme environmental stress. |
| No-Load Quiescent Current | 130µA in Burst Mode® - extends battery runtime in always-on subsystems without sacrificing regulation. |
| Switching Frequency Range | 400kHz to 4MHz - allows optimization of inductor size (e.g., 0.47µH at 2.25MHz) vs. efficiency vs. EMI. |
| Phase Shift Options | 0°, 90°, or 180° between channels - reduces input capacitor RMS current by up to 70% in dual-output mode. |
| Shutdown Current | ≤1µA - meets ultra-low-power system-level sleep requirements for aerospace and remote sensors. |
Pinout & Package
Package: 24-pin (4mm × 4mm) plastic QFN with exposed PGND pad (Pin 25), rated for –55°C to 150°C junction temperature and θJA = 37°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1 / SW2 | Channel 1 / 2 switching node | Connects to external inductor; drives internal Pch/Nch synchronous MOSFETs - requires low-inductance layout to minimize switching loss and EMI. |
| VFB1 / VFB2 | Feedback input for channel 1 / 2 | Monitors output voltage via resistive divider; references internal 0.6V bandgap - sets output with ±1% accuracy across full temp range. |
| ITH1 / ITH2 | Error amplifier compensation node | Controls peak inductor current; ties to SVIN for AVP/internal compensation or external RC for custom loop response. |
| RUN1 / RUN2 | Enable inputs for channel 1 / 2 | Logic-high (>1V) enables respective channel; both low disables entire IC with ≤1µA shutdown current. |
| PHASE | Inter-channel phase select | 0° (SGND), 90° (SVIN/2), or 180° (SVIN) - configures ripple cancellation topology without external logic. |
| SRLIM | Slew rate limit / DDR mode control | Tied to SGND → max slew; open → min slew; tied to SVIN → max slew + DDR sink-current mode (±1.5A). |
| RT/SYNC | Oscillator frequency control | Resistor-to-GND sets fSW (400kHz–4MHz); external clock syncs up to 4MHz with auto-slope compensation. |
| PGOOD1 / PGOOD2 | Open-drain power-good indicators | Assert low if FBx deviates >±7.5% or RUNx is inactive - enables sequenced power-up in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3A synchronous buck topology | Eliminates external catch diodes, reduces BOM count, improves efficiency to 94% at 3A, and enables compact 2-layer PCB layouts. |
| 100% duty cycle low-dropout operation | Maintains regulation as VIN approaches VOUT - critical for battery-powered systems near end-of-discharge (e.g., 2.5V out from 2.6V cell). |
| Programmable slew rate limiting | Reduces EMI emissions by controlling dV/dt on SW pins - avoids costly shielding or filter redesign during EMC validation. |
| Accurate start-up tracking | TRACK/SS1/2 pins enable coordinated ramp-up with master supply - prevents latch-up in FPGA/CPU core-I/O sequencing. |
| DDR memory termination mode | SRLIM = SVIN activates ±1.5A sink/source capability - satisfies JEDEC DDR3/DDR4 VTT termination requirements without discrete components. |
Applications
| Portable Computer Systems | DDR Memory Termination |
|---|---|
Use Scenario: Powering CPU core, GPU, and I/O rails in ruggedized tablets and military-grade laptops operating across –55°C to 150°C ambient. IC Role / Device Role / Timing Role: Dual-channel PoL regulator delivering 1.8V/3A and 2.5V/3A with tight cross-regulation and phase-interleaved ripple suppression. Use Value: Enables single-chip solution for multi-rail sequencing, reducing board area by 35% versus discrete converters while maintaining <±1% output accuracy over full temperature range. | Use Scenario: Providing matched, low-noise VTT termination for DDR3/DDR4 memory subsystems in avionics data recorders and radar processors. IC Role / Device Role / Timing Role: Configured in DDR mode (SRLIM = SVIN) to deliver ±1.5A sink/source current with fast transient response (<50µs recovery from 1A step). Use Value: Replaces discrete op-amp + MOSFET VTT solutions, eliminating 7 components and improving termination accuracy to ±15mV under dynamic load. |
| Point-of-Load Supplies | Handheld Devices |
Use Scenario: Regulating FPGA core voltage (e.g., 0.85V/3A) and auxiliary rails in industrial PLCs and edge AI accelerators deployed in high-vibration environments. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with internal compensation and robust thermal design (exposed PGND pad soldered to 2oz copper). Use Value: Delivers 92% efficiency at 1A load and maintains stable operation at 150°C junction - eliminates need for forced-air cooling in sealed enclosures. | Use Scenario: Power management in handheld test equipment and portable medical monitors requiring long battery life and reliable cold-temperature startup. IC Role / Device Role / Timing Role: Dual-output converter supplying 1.2V/3A sensor interface and 3.3V/3A MCU rail from single Li-ion cell (2.7–4.2V). Use Value: Burst Mode® operation achieves 130µA IQ, extending runtime by 2.1× versus PWM-only converters at light loads (<10mA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543B20RJER | Single-channel 3A, 4.5–18V input, integrated FETs, 500kHz–2.2MHz fSW - lacks dual-channel integration and phase-shift capability. | Requires two units for dual 3A outputs; no native inter-channel phase control or DDR mode. | Select when higher input voltage (>5.5V) or lower cost per channel outweighs board-area savings and advanced features. |
| ISL8203MIRZ | Dual 3A module (integrated inductor), 2.7–6V input, fixed 500kHz/1MHz fSW, –40°C to 125°C rating - no programmable phase shift or slew rate control. | Higher solution size due to embedded inductors; limited frequency flexibility and no DDR sink capability. | Choose for rapid prototyping where layout simplicity and reduced design risk outweigh performance tuning needs. |
Compared with TPS543B20RJER and ISL8203MIRZ, the LTC3615MPUF#TRPBF provides unique value in thermally demanding dual-rail systems through its extended –55°C to 150°C operation, 0°/90°/180° phase-selectable architecture, and integrated DDR termination - enabling smaller, more robust, and functionally richer power designs.
Availability
LTC3615MPUF#TRPBF is available at Aetrix Electronics and suitable for portable computer systems, DDR memory termination, and ruggedized point-of-load supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3615MPUF#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 legacy of high-performance analog and power management ICs with rigorous automotive, industrial, and aerospace qualification standards.
The LTC3615MPUF#TRPBF belongs to Linear's monolithic synchronous buck regulator product line, engineered for high-density, high-reliability power conversion in mission-critical applications where thermal resilience, precision regulation, and feature-rich control are mandatory.
FAQ
What is the maximum operating junction temperature for the LTC3615MPUF#TRPBF?
The LTC3615MPUF#TRPBF is fully specified and tested over a junction temperature range of –55°C to 150°C. This extended rating is validated per manufacturer test protocols and enables deployment in aerospace, downhole, and military platforms where ambient temperatures exceed standard commercial or industrial limits. Derating guidelines apply above 125°C to ensure long-term reliability.
Does the LTC3615MPUF#TRPBF support DDR memory termination with sink current capability?
Yes, the LTC3615MPUF#TRPBF supports DDR termination mode when the SRLIM pin is tied to SVIN. In this configuration, it delivers ±1.5A sink/source current with fast transient response, meeting JEDEC-compliant VTT requirements for DDR3 and DDR4 memory interfaces without external components.
How is phase shift configured between the two channels of the LTC3615MPUF#TRPBF?
Phase shift on the LTC3615MPUF#TRPBF is set via the PHASE pin: 0° when tied to SGND, 90° when biased to SVIN/2, and 180° when tied to SVIN. This hardware-selectable configuration enables optimal input/output ripple cancellation without firmware or external timing circuitry.
What are the key differences between Burst Mode® and forced continuous mode on the LTC3615MPUF#TRPBF?
Burst Mode® (MODE = SGND) minimizes light-load IQ to 130µA by disabling internal circuits between bursts, trading slight output ripple for maximum battery life. Forced continuous mode (MODE = 1.1V to 0.58×SVIN) sustains switching at all loads, ensuring lowest ripple and enabling sink-current operation - required for DDR termination.
Can the LTC3615MPUF#TRPBF be synchronized to an external clock source?
Yes, the LTC3615MPUF#TRPBF supports external clock synchronization up to 4MHz via the RT/SYNC pin. When driven with a clean CMOS clock signal (tLOW/tHIGH >30ns), the internal oscillator locks and automatically adapts slope compensation - essential for noise-sensitive systems requiring deterministic switching timing.
LTC3615MPUF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN 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):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 400kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
LTC3615MPUF#TRPBF FAQ
1.How can I place an order for LTC3615MPUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3615MPUF#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 LTC3615MPUF#TRPBF reliable?
The price and inventory of LTC3615MPUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3615MPUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3615MPUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3615MPUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3615MPUF#TRPBF?
LTC3615MPUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3615MPUF#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 LTC3615MPUF#TRPBF?
For technical support, including LTC3615MPUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3615MPUF#TRPBF requirements.
6.How does Aetrix verify that LTC3615MPUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3615MPUF#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 LTC3615MPUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3615MPUF#TRPBF?
All LTC3615MPUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3615MPUF#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 LTC3615MPUF#TRPBF part is unused and in its original packaging.
Return procedure for LTC3615MPUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3615MPUF#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…
