My Inquiry
My Account
Analog Devices Inc. LTC3315AHV#TRPBF
- Part No.:
- LTC3315AHV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315AHV#TRPBF.pdf
- Description:
- IC REG BUCK 0.5V 2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,364
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3315AHV#TRPBF from Analog Devices is a dual-channel monolithic synchronous step-down DC/DC converter IC delivering 2A per channel from a 2.25V–5.5V input, operating at 2MHz fixed frequency with 25ns minimum on-time and ±1% output voltage accuracy. It integrates two independent buck regulators in a thermally enhanced 2mm × 2mm LQFN package, supporting automotive-grade operation up to 150°C junction temperature for FPGA core supplies and distributed POL applications.
For engineers reviewing the LTC3315AHV#TRPBF datasheet, LTC3315AHV#TRPBF pinout, LTC3315AHV#TRPBF application, or LTC3315AHV#TRPBF equivalent, key selection criteria include dual 2A output capability, AEC-Q100 qualification, forced continuous/pulse-skipping/Burst Mode® operation, 500mV feedback reference, and 180° out-of-phase switching for reduced input ripple.
Technical Context
The LTC3315AHV#TRPBF implements peak current mode control with internal compensation and dual independent control loops-one per buck channel-each regulating its FB pin to 500mV (±1%) with precision enable thresholds (400mV) and power-good monitoring. Its 180° phase relationship between SW1 and SW2 minimizes input capacitor RMS current.
It supports three selectable operating modes via the MODE/SYNC pin: forced continuous (floating), pulse-skipping (grounded), or Burst Mode® (tied to VIN), with automatic adaptation of slope compensation during external synchronization from 1MHz to 3MHz. Thermal shutdown activates at 165°C with 5°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and intermediate bus rails without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables direct regulation down to sub-1V FPGA/ASIC core voltages. |
| Output Accuracy | ±1% over line/load/temperature - ensures stable logic supply compliance across automotive thermal extremes. |
| Switching Frequency | 2MHz (default), synchronizable 1–3MHz - allows compact 880nH inductors and low-profile ceramic output caps. |
| Min On-Time | 25ns - enables high step-down ratios (e.g., 5.5V→0.8V at 2MHz) without pulse skipping. |
| Efficiency Peak | 95% at 2A, VOUT=1.2V, VIN=3.3V - achieved via 19mΩ NMOS and 75mΩ PMOS integrated FETs. |
| Shutdown Current | 1.2µA - preserves battery life in always-on automotive modules during deep sleep. |
Pinout & Package
The LTC3315AHV#TRPBF is housed in a 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed thermal pad (Pin 13 = GND). Pin assignment is identical across all LTC3315A variants; the HV grade denotes –40°C to 150°C junction temperature rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Independent enable inputs | Active-high with 400mV precision threshold; supports sequenced power-up via resistor dividers from upstream rails. |
| FB1, FB2 | Feedback inputs | Regulate respective outputs to 500mV; require external resistor dividers; support phase-lead compensation for transient stability. |
| SW1, SW2 | Switch nodes | Connect to inductors; each tied to dedicated high-side PMOS and low-side NMOS; SW1/SW2 operate 180° out-of-phase. |
| VIN (Pins 7,10) | Input supply | Dual VIN pins reduce IR drop and improve thermal distribution; require local low-ESR ceramic bypassing. |
| GND (Pins 8,9,13) | Ground terminals | Three GND connections including exposed pad; pad must be soldered to PCB ground plane for θJA = 51°C/W thermal performance. |
| PGOOD | Open-drain status output | Asserts low if either enabled output falls below 97% or exceeds 110% of target; requires external pull-up. |
| MODE/SYNC | Mode control & sync input | Selects Burst Mode® (VIN), pulse-skipping (GND), or forced continuous (float); accepts 1–3MHz external clock for EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 2A buck regulators | Enables compact dual-rail power delivery (e.g., 1.2V + 1.8V) without discrete controllers or layout duplication. |
| AEC-Q100 qualified (Grade H) | Validated for automotive under-hood applications with guaranteed operation from –40°C to 150°C junction temperature. |
| 180° out-of-phase switching | Reduces input capacitor RMS current by ~30% versus in-phase operation, lowering required capacitance and board area. |
| Internal soft-start and compensation | Eliminates need for external compensation networks; 0.25–3ms programmable soft-start prevents inrush-induced rail collapse. |
| Output overvoltage & short-circuit protection | Prevents damage during fault conditions; OVP triggers at 107–114% VOUT with 1–3.5% hysteresis; short-circuit limits peak current to 2.9–3.5A. |
Applications
| FPGA Core Supply | Distributed POL System |
|---|---|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core banks requiring tightly regulated 0.8V–1.2V at up to 2A per rail with fast load transient response. IC Role / Device Role / Timing Role: Dual-channel synchronous buck regulator providing independent, phase-shifted 2A outputs with PGOOD sequencing and ±1% accuracy. Use Value: Eliminates need for two discrete converters; 25ns min-on-time supports high step-down ratio without frequency foldback; 180° phasing cuts input ripple by 30%. | Use Scenario: Local point-of-load conversion in telecom base station cards where space-constrained 5V intermediate bus must feed multiple 1.8V/3.3V subsystems. IC Role / Device Role / Timing Role: Compact dual-buck POL regulator enabling two independent 2A outputs from shared 3.3–5.5V input with synchronized switching. Use Value: Reduces total solution size by 40% vs discrete solutions; 2MHz operation allows 880nH inductors; Burst Mode® extends battery runtime in standby. |
| Automotive ADAS Camera Module | Industrial PLC I/O Power |
Use Scenario: Powering image sensor and ISP in automotive surround-view camera modules operating in under-hood environments up to 105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 Grade H dual buck supplying 1.2V sensor core and 1.8V digital interface with thermal shutdown at 165°C. Use Value: Guaranteed 150°C junction operation enables reliable deployment without derating; PGOOD monitors both rails for fail-safe system reset. | Use Scenario: Providing isolated 2.5V and 3.3V rails for analog front-end and microcontroller in DIN-rail mounted industrial PLCs with wide temperature cycling. IC Role / Device Role / Timing Role: Dual-output DC/DC converter with precision enable thresholds enabling controlled power sequencing across mixed-signal subsystems. Use Value: 400mV EN thresholds allow direct connection to upstream 3.3V logic; ±1% VOUT accuracy maintains ADC reference stability across –40°C to 85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65218D0RSLR | Single-chip PMIC with 4 buck + 5 LDOs; lower max current per buck (1.8A); no 25ns min-on-time; 2.5V–5.5V VIN. | Targets full-system power management (AM335x/AM437x); not optimized for ultra-compact dual-rail-only designs. | Choose when needing integrated LDOs, battery fuel gauge, or system reset logic beyond dual bucks. |
| LTC3310S#TRPBF | Single 2A buck; same 2.25V–5.5V VIN, 25ns min-on-time, and 150°C rating; lacks second channel and PGOOD per rail. | Used where only one regulated rail is required; requires two units for dual-rail, increasing BOM count and layout area. | Choose when design needs only one 2A output or requires independent thermal management per channel. |
Compared with TPS65218D0RSLR and LTC3310S#TRPBF, the LTC3315AHV#TRPBF uniquely delivers dual 2A outputs in a 4mm² footprint with AEC-Q100 Grade H qualification, 25ns min-on-time for high step-down, and true per-rail PGOOD-making it optimal for space- and reliability-critical dual-rail automotive and industrial POL systems.
Availability
LTC3315AHV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS camera modules, FPGA core supplies, and distributed POL systems requiring stable component supply with extended temperature support and AEC-Q100 compliance.
Supply support for LTC3315AHV#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3315A product line delivers highly integrated, thermally robust dual-buck regulators for space-constrained applications demanding high efficiency, fast transient response, and automotive-grade reliability-targeting FPGA, ASIC, and processor core power delivery.
FAQ
What is the maximum junction temperature rating for the LTC3315AHV#TRPBF?
The LTC3315AHV#TRPBF is rated for operation up to 150°C junction temperature, meeting AEC-Q100 Grade H requirements. This is confirmed in the Absolute Maximum Ratings table and Operating Junction Temperature section of the datasheet, where "LTC3315AH" explicitly specifies –40°C to 150°C. The "HV" suffix denotes this high-temperature variant, distinguishing it from standard-grade versions like LTC3315AE (125°C).
Does the LTC3315AHV#TRPBF support external clock synchronization, and what is the valid frequency range?
Yes, the LTC3315AHV#TRPBF supports external clock synchronization via the MODE/SYNC pin across a 1MHz to 3MHz range. When an external square wave is applied, the internal PLL locks Buck 1's PMOS turn-on edge to the rising edge of the input clock, while Buck 2 remains 180° out-of-phase. Synchronization forces forced continuous mode operation and automatically adapts slope compensation for stable current-mode control.
How does the LTC3315AHV#TRPBF handle power sequencing between its two output rails?
The LTC3315AHV#TRPBF enables precise power sequencing through independent EN1 and EN2 pins, each with a 400mV precision enable threshold. By connecting EN2 to the output of a resistor divider from VOUT1, designers can delay activation of the second rail until the first reaches regulation. The device also provides a single open-drain PGOOD output that asserts only when both enabled rails are within specification.
What are the key thermal design requirements for the LTC3315AHV#TRPBF in high-power operation?
For reliable high-power operation, the LTC3315AHV#TRPBF requires soldering its exposed thermal pad (Pin 13) directly to a solid PCB ground plane. The datasheet specifies θJA = 51°C/W when mounted per JESD51-7 on a 2S2P test board. To maintain ≤150°C junction temperature at full 2A per channel, ambient must be limited based on power dissipation-e.g., at 90% efficiency (0.2W loss per channel), max ambient should not exceed ~80°C with adequate copper area and airflow.
Can the LTC3315AHV#TRPBF operate with only one buck enabled while the other remains disabled?
Yes, the LTC3315AHV#TRPBF supports independent operation: EN1 and EN2 control each buck separately. With only one buck enabled, quiescent current drops to 45–70µA (Burst Mode) or 1.5–2.3mA (all modes active), while the disabled buck enters a high-impedance state with SW pins floating. Both bucks must be disabled to achieve the lowest 1.2µA shutdown current. The PGOOD output remains low if either rail is unregulated or disabled.
LTC3315AHV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 1MHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315AHV#TRPBF FAQ
1.How can I place an order for LTC3315AHV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315AHV#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 LTC3315AHV#TRPBF reliable?
The price and inventory of LTC3315AHV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315AHV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3315AHV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315AHV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315AHV#TRPBF?
LTC3315AHV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315AHV#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 LTC3315AHV#TRPBF?
For technical support, including LTC3315AHV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315AHV#TRPBF requirements.
6.How does Aetrix verify that LTC3315AHV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315AHV#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 LTC3315AHV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3315AHV#TRPBF?
All LTC3315AHV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315AHV#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 LTC3315AHV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3315AHV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3315AHV#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…
