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Analog Devices Inc. LTC3315BHV#TRMPBF
- Part No.:
- LTC3315BHV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315BHV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:470
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Product details
Overview
LTC3315BHV#TRMPBF 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, regulating outputs as low as 0.5V with ±1% feedback accuracy and 6MHz fixed switching frequency in a thermally enhanced 2mm × 2mm LQFN-12 package. It integrates two independent buck regulators with peak current mode control, 25ns minimum on-time, and 100% duty cycle capability for ultra-low dropout operation - deployed in FPGA core supplies, automotive infotainment power rails, and telecom POL systems.
For engineers reviewing the LTC3315BHV#TRMPBF datasheet, LTC3315BHV#TRMPBF pinout, LTC3315BHV#TRMPBF application, or LTC3315BHV#TRMPBF equivalent, key selection criteria include its AEC-Q100 qualified –40°C to 150°C junction temperature rating, dual-phase 180° out-of-phase switching for reduced input ripple, Burst Mode® operation enabling 1.2µA shutdown current, and MODE/SYNC pin support for external clock synchronization from 3MHz to 10MHz.
Technical Context
The LTC3315BHV#TRMPBF implements constant-frequency peak current mode control with independent FB1/FB2 feedback loops each regulated to 500mV (±1%), enabling precise dual-output voltage programming. Its internal oscillator defaults to 6MHz and locks to external clocks via MODE/SYNC with automatic slope compensation adaptation.
Each buck features integrated 19mΩ NMOS and 75mΩ PMOS switches, forward/reverse current limiting (2.7A valley / 3.2A peak), and 180° phase offset between SW1 and SW2 to minimize input capacitor RMS current. The device supports forced continuous, pulse-skip, and Burst Mode® operation - selected via MODE/SYNC pin voltage - with thermal shutdown at 165°C and output overvoltage protection triggering at 110% of VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, 3.3V/5V system rails, and automotive cold-crank conditions down to 2.25V. |
| VOUT Range | 0.5V to VIN - enables direct regulation for sub-1V FPGA/ASIC cores and configurable I/O supplies. |
| Output Accuracy | ±1% over temp - ensures stable logic supply margins across –40°C to 150°C junction range. |
| Switching Frequency | 6MHz default, syncable 3–10MHz - permits use of <330nH inductors and compact ceramic output caps for space-constrained PCBs. |
| Min On-Time | 25ns - enables high step-down ratios (e.g., 5.5V→0.5V at 6MHz) without pulse skipping at light loads. |
| Shutdown Current | 1.2µA - extends battery life in always-on automotive modules and IoT edge nodes. |
| Thermal Rating | Junction max 150°C, AEC-Q100 qualified - validated for under-hood automotive applications including ADAS domain controllers. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed thermal pad (Pin 13 = GND). Requires soldering exposed pad to solid ground plane for θJB = 12°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 (Pins 1, 4) | Independent enable inputs | 400mV precision threshold enables power-up sequencing; tie to VIN for always-on, or resistor divider for voltage-triggered turn-on. |
| FB1, FB2 (Pins 2, 3) | Feedback inputs | Regulated to 500mV ±1%; set VOUT = 0.5V × (1 + R1/R2); phase-lead cap between FB and VOUT optimizes transient response. |
| SW1, SW2 (Pins 11, 6) | Switch node outputs | Drive external inductors; require short/wide traces to minimize EMI and switching losses; 180° phase offset reduces input ripple. |
| VIN (Pins 7, 10) | Input supply pins | Supply both bucks and internal circuitry; must be paralleled and bypassed locally with low-ESR ceramics near each pin. |
| GND (Pins 8, 9, 13) | Ground terminals | Three GND connections including exposed pad - mandatory for thermal dissipation and noise immunity; pad must be soldered to PCB ground plane. |
| PGOOD (Pin 5) | Open-drain power-good output | Asserts high only when both enabled bucks are within 97–99% of target VOUT and no overvoltage (>110%) or thermal fault exists. |
| MODE/SYNC (Pin 12) | Mode control & sync input | Ground = pulse-skip; float = forced continuous; VIN = Burst Mode®; external square wave = sync 3–10MHz with auto PLL lock. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks in single LQFN | Eliminates two discrete converters, saving >30mm² board area while maintaining independent output control and sequencing. |
| 180° interleaved switching | Reduces input capacitor RMS current by ~30% vs. in-phase operation, enabling smaller input bulk caps and lower EMI. |
| Burst Mode® with 1.2µA shutdown | Extends battery runtime in standby states without compromising fast wake-up response (<100µs start delay). |
| Robust protection suite | Includes output overvoltage shutdown (110% trip), thermal shutdown (165°C), short-circuit recovery, and safe inductor saturation tolerance. |
| AEC-Q100 Grade H qualification | Validated for automotive applications requiring –40°C to 150°C operation, including engine control units and infotainment head units. |
Applications
| Automotive Infotainment Power | FPGA Core & I/O Supplies |
|---|---|
Use Scenario: Dual-rail power for SoC-based head units with separate 1.2V core and 3.3V I/O domains. IC Role / Device Role / Timing Role: Primary POL regulator delivering tightly regulated, low-noise 1.2V/2A and 3.3V/2A from 5V vehicle bus. Use Value: AEC-Q100 qualification ensures reliability under automotive thermal cycling; 6MHz switching allows compact 0603 inductors and eliminates audible noise. |
Use Scenario: Powering Xilinx Artix-7 FPGA with dynamic core voltage scaling and multiple I/O banks. IC Role / Device Role / Timing Role: Dual-output buck supplying 0.85V core and 1.8V auxiliary rail with independent enable control for partial reconfiguration. Use Value: 25ns min on-time supports 5.5V→0.85V conversion at 6MHz; soft-start prevents configuration corruption during power-up. |
| Optical Networking Line Cards | Industrial PLC CPU Modules |
Use Scenario: Compact 3.3V/2A and 1.8V/2A supplies for SFP+ transceiver ASICs and SerDes interfaces. IC Role / Device Role / Timing Role: High-density point-of-load regulator replacing discrete solutions on space-constrained line card PCBs. Use Value: 2mm × 2mm footprint fits between BGA pads; 100% duty cycle maintains regulation during brownout events on 3.3V input rails. |
Use Scenario: Redundant 2.5V/2A and 1.2V/2A supplies for ARM Cortex-A53-based PLC controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary power management IC with PGOOD monitoring for watchdog reset and fault logging. Use Value: –40°C to 150°C rating ensures operation inside sealed enclosures; PGOOD assertion delay filters transient dips during motor startup. |
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 |
|---|---|---|---|
| TPS6521905RGER | Single 4A buck + dual LDOs; no dual 2A synchronous bucks; max VIN = 5.5V; no Burst Mode®; 2.5MHz max fSW. | Targeted at USB-C PD sink applications with integrated USB interface; lacks automotive qualification and 6MHz capability. | Select only if LDO post-regulation is required and 6MHz switching is unnecessary. |
| MAX20404ATPA/VY+ | Dual 3A bucks; 2.5–5.5V VIN; 2.2MHz fSW; ±1.5% VOUT accuracy; no AEC-Q100 grade; 3.5µA shutdown current. | Designed for consumer notebooks and tablets; higher output current but lower accuracy and thermal rating than LTC3315BHV#TRMPBF. | Choose when higher output current is critical and automotive qualification is not required. |
Compared with TPS6521905RGER and MAX20404ATPA/VY+, the LTC3315BHV#TRMPBF uniquely combines AEC-Q100 Grade H qualification, 6MHz switching for ultra-compact magnetics, and true dual 2A synchronous regulation - making it optimal for space- and reliability-constrained automotive and industrial POL designs where timing precision and thermal robustness are non-negotiable.
Availability
LTC3315BHV#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, FPGA power delivery, and optical networking equipment requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for LTC3315BHV#TRMPBF 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3315BHV#TRMPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, high-frequency monolithic DC/DC converters designed specifically for demanding automotive, telecom, and computing point-of-load applications where size, thermal performance, and reliability are critical.
FAQ
What is the maximum junction temperature rating for the LTC3315BHV#TRMPBF?
The LTC3315BHV#TRMPBF is rated for a maximum junction temperature of 150°C and is AEC-Q100 qualified for Grade H automotive applications. Its overtemperature shutdown activates at 165°C (typical), with 5°C hysteresis, ensuring safe operation under sustained thermal stress. This rating is confirmed in the Absolute Maximum Ratings table and applies specifically to the HV suffix variant.
Does the LTC3315BHV#TRMPBF support external clock synchronization, and what is the valid frequency range?
Yes, the LTC3315BHV#TRMPBF supports external clock synchronization via the MODE/SYNC pin (Pin 12). The valid synchronization frequency range is 3MHz to 10MHz, with automatic PLL lock and slope compensation adaptation. During sync, both bucks operate in forced continuous mode with 180° phase offset, and the internal oscillator gradually adjusts to match the external source within ~10µs of detection.
How does the PGOOD pin behave when only one buck regulator is enabled?
When only one buck regulator is enabled, the PGOOD pin (Pin 5) remains high only if that enabled buck's output is within its PGOOD window (97–99% of target VOUT) and no overvoltage (>110%) or thermal fault exists. If the enabled buck falls outside this window for >120µs, PGOOD is pulled low. PGOOD is also low if both bucks are disabled, VIN is below UVLO, or die temperature exceeds 165°C.
What are the exact enable threshold voltages for EN1 and EN2 on the LTC3315BHV#TRMPBF?
The LTC3315BHV#TRMPBF features precision enable thresholds of 400mV (typical) for both EN1 and EN2, with ±25mV tolerance over temperature. Enable hysteresis is 50mV, meaning the falling threshold is 375mV and rising threshold is 425mV. These values are specified in the Electrical Characteristics table and apply across the full –40°C to 150°C junction temperature range.
Can the LTC3315BHV#TRMPBF operate with a 2.25V input and deliver 0.5V at 2A on both channels simultaneously?
Yes, the LTC3315BHV#TRMPBF supports VIN as low as 2.25V and VOUT as low as 0.5V per channel. At 2.25V input and 0.5V output, the required duty cycle is ~22%, well within the 100% capability. Efficiency remains >80% at 2A per channel (per G19/G20 curves), and the 25ns minimum on-time ensures stable regulation without pulse skipping at light loads.
LTC3315BHV#TRMPBF 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:
- Adjustable
- 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, 2A
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315BHV#TRMPBF FAQ
1.How can I place an order for LTC3315BHV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315BHV#TRMPBF 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 LTC3315BHV#TRMPBF reliable?
The price and inventory of LTC3315BHV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315BHV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3315BHV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315BHV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315BHV#TRMPBF?
LTC3315BHV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315BHV#TRMPBF 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 LTC3315BHV#TRMPBF?
For technical support, including LTC3315BHV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315BHV#TRMPBF requirements.
6.How does Aetrix verify that LTC3315BHV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315BHV#TRMPBF 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 LTC3315BHV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3315BHV#TRMPBF?
All LTC3315BHV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315BHV#TRMPBF, 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 LTC3315BHV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3315BHV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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