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Analog Devices Inc. LTC3315BMPV#TRMPBF
- Part No.:
- LTC3315BMPV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315BMPV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:609
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Product details
Overview
LTC3315BMPV#TRMPBF from Analog Devices is a dual monolithic synchronous step-down DC/DC converter delivering 2A per channel from a 2.25V–5.5V input, regulating outputs as low as 0.5V with ±1% accuracy and 6MHz fixed switching frequency. It integrates two independent 2A buck regulators in a single 2mm × 2mm LQFN package, supporting forced continuous, pulse-skip, and Burst Mode® operation for high efficiency across load ranges - deployed in FPGA core supplies, automotive infotainment power rails, and space-constrained POL systems.
For engineers reviewing the LTC3315BMPV#TRMPBF datasheet, LTC3315BMPV#TRMPBF pinout, LTC3315BMPV#TRMPBF application, or LTC3315BMPV#TRMPBF equivalent, key selection criteria include its –55°C to +150°C extended temperature grade, dual-phase 180° out-of-phase operation, 25ns minimum on-time, integrated 19mΩ NMOS / 75mΩ PMOS switches, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC3315BMPV#TRMPBF implements peak current mode control with internal compensation and dual independent feedback loops (FB1/FB2), each regulating to a precise 500mV reference. Its 180° phase-shifted dual-buck architecture reduces input ripple and eases EMI filtering while maintaining tight output regulation under dynamic loads.
Operating modes are selected via the MODE/SYNC pin: forced continuous (floating), pulse-skip (grounded), or Burst Mode® (tied to VIN); external clock synchronization from 3MHz to 10MHz is supported with automatic slope compensation adaptation. Overvoltage protection triggers at 110% VOUT with 120µs delay, and 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 wide-input battery and intermediate bus applications including 3.3V and 5V rails. |
| Output Current | 2A per channel - enables dual-core processor or multi-rail FPGA supply without external current sharing. |
| Switching Frequency | 6MHz (default), synchronizable 3–10MHz - allows ultra-small 240nH–330nH inductors and <10µF ceramic output capacitors. |
| Feedback Accuracy | ±1% over –55°C to +150°C - ensures stable core voltage regulation across automotive and industrial extremes. |
| Minimum On-Time | 25ns - enables high step-down ratios (e.g., 5.5V → 0.5V at 6MHz) without pulse skipping. |
| Quiescent Current | 1.2µA in shutdown - critical for always-on automotive modules with strict leakage budgets. |
| Thermal Rating | Junction range –55°C to +150°C - qualified per AEC-Q100 Grade 1 (MP grade), suitable for under-hood and engine-control environments. |
Pinout & Package
The LTC3315BMPV#TRMPBF is housed in a thermally enhanced 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed pad (Pin 13) soldered to PCB ground for optimal thermal performance (θJB = 12°C/W). Pin assignments are validated per Analog Devices' official pin configuration diagram (Rev. 0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 (Pins 1, 4) | Independent enable inputs | 400mV precision thresholds enable sequenced startup; resistor dividers allow event-triggered activation from upstream rails. |
| FB1, FB2 (Pins 2, 3) | Feedback nodes | Regulate to 500mV reference; support external phase-lead compensation for fast transient response. |
| SW1, SW2 (Pins 11, 6) | Switch node outputs | Drive external inductors; 180° phase shift minimizes input capacitor RMS current and improves thermal distribution. |
| VIN (Pins 7, 10) | Input supply | Dual VIN pins reduce IR drop and improve current sharing into internal PMOS switches and bias circuitry. |
| GND (Pins 8, 9, 13) | Ground terminals | Three GND connections-including thermally critical exposed pad-ensure low-impedance return path and 51°C/W θJA. |
| PGOOD (Pin 5) | Open-drain power-good indicator | Asserts high only when both enabled outputs are within 97–99% of target; reports OV (>110%) and UVLO faults with 120µs debounce. |
| MODE/SYNC (Pin 12) | Mode control & sync input | Selects operating mode (Burst/Pulse-Skip/Forced Continuous) or accepts external 3–10MHz clock for deterministic EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks in single LQFN | Reduces board area by >40% vs. discrete dual-buck solutions; eliminates inter-channel layout mismatch and timing skew. |
| 180° phase interleaving | Cuts input ripple amplitude by ~70%, enabling smaller input bulk capacitance and easing EMI compliance in dense automotive PCBs. |
| Burst Mode® with 1.2µA shutdown IQ | Extends battery life in always-on telematics modules; maintains regulation during microamp-level sleep states. |
| Integrated 19mΩ NMOS / 75mΩ PMOS | Eliminates external MOSFETs and gate drivers; achieves >90% efficiency at 1A load with 330nH inductor and 10µF output cap. |
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood operation (–40°C to +150°C junction); includes production lot traceability and HTOL stress screening. |
| Output overvoltage protection (OVP) | Shuts off PMOS within nanoseconds if FB exceeds 110% VOUT - prevents damage to sensitive 1.2V/1.8V ASIC cores during fault conditions. |
Applications
| FPGA Core Supply | Automotive ADAS Power Rail |
|---|---|
Use Scenario: Powering dual-voltage FPGA banks (e.g., 1.2V core, 2.5V I/O) from a 3.3V or 5V vehicle bus. IC Role / Device Role / Timing Role: Dual independent buck regulator providing tightly regulated, low-noise, phase-interleaved power with soft-start sequencing. Use Value: Enables single-chip solution for heterogeneous FPGA rail requirements while meeting ISO 16750-2 pulse test immunity and AEC-Q100 thermal limits. |
Use Scenario: Supplying image sensor and radar processor subsystems in forward-facing camera modules. IC Role / Device Role / Timing Role: High-reliability POL converter delivering 1.8V/2.0V at 2A each with PGOOD fault reporting to MCU watchdog timer. Use Value: Satisfies ASIL-B functional safety requirements via built-in OVP, thermal shutdown, and undervoltage lockout with hysteresis. |
| Industrial PLC I/O Module | Optical Networking Line Card |
Use Scenario: Generating isolated 3.3V and 5V rails for digital I/O and analog front-end circuitry in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Compact dual-buck regulator supporting wide input (2.25–5.5V) from backup supercapacitor or 3.3V backplane. Use Value: Maintains regulation down to 2.25V input during brownout events; 100% duty cycle operation sustains output during low-VIN transients. |
Use Scenario: Point-of-load conversion for DSPs and SerDes in 10G/25G optical transceivers requiring low-noise, high-frequency switching. IC Role / Device Role / Timing Role: 6MHz synchronized buck pair minimizing conducted EMI near high-speed data lanes and reducing filter component count. Use Value: Achieves <10mVpp output ripple in Burst Mode®, meeting stringent jitter-sensitive SerDes power integrity specs. |
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 fSW = 2.2MHz; no Burst Mode®; -40°C to +125°C rating. | Suitable for mixed-signal SoC power where LDO noise rejection is prioritized over high-frequency efficiency. | Choose TPS6521905RGER only if LDO integration and lower EMI are required - not for high-density, high-efficiency dual-buck POL. |
| MP2451DT-LF-Z | Single 2A buck; no dual-channel capability; 2MHz max fSW; no phase interleaving; no AEC-Q100 qualification; 0°C to +70°C commercial grade. | Applicable for cost-sensitive non-automotive consumer electronics with relaxed thermal and reliability requirements. | MP2451DT-LF-Z lacks dual regulation, automotive qualification, and high-frequency operation - not a functional substitute for LTC3315BMPV#TRMPBF. |
Compared with TPS6521905RGER and MP2451DT-LF-Z, the LTC3315BMPV#TRMPBF uniquely delivers dual 2A synchronous buck regulation in an AEC-Q100-qualified 2mm × 2mm package with 6MHz switching, 25ns min on-time, and –55°C to +150°C operation - making it the only option for space-constrained, high-reliability automotive and industrial POL designs requiring true dual independent outputs.
Availability
LTC3315BMPV#TRMPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, FPGA-based industrial controllers, and optical networking line cards requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3315BMPV#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 LTC3315BMPV#TRMPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, high-frequency monolithic DC/DC converters designed specifically for demanding automotive, aerospace, and industrial point-of-load applications where size, thermal performance, and reliability are critical.
FAQ
What is the operating temperature range of the LTC3315BMPV#TRMPBF?
The LTC3315BMPV#TRMPBF is rated for a junction temperature range of –55°C to +150°C and is qualified per AEC-Q100 Grade 1. This extended range supports under-hood automotive applications, industrial control environments, and high-reliability aerospace deployments where ambient temperatures exceed standard commercial or industrial grades. The device incorporates overtemperature shutdown at 165°C with 5°C hysteresis.
Does the LTC3315BMPV#TRMPBF support external clock synchronization?
Yes, the LTC3315BMPV#TRMPBF supports external clock synchronization via the MODE/SYNC pin (Pin 12). It accepts square-wave clocks from 3MHz to 10MHz, locking Buck 1's PMOS turn-on edge to the rising edge of the external signal while maintaining 180° phase offset for Buck 2. During synchronization, the device operates in forced continuous mode with automatically adapted slope compensation.
How does the PGOOD pin function on the LTC3315BMPV#TRMPBF?
The PGOOD pin (Pin 5) is an open-drain output that goes high only when both enabled buck regulators maintain output voltage within 97–99% of their programmed value for >120µs. It pulls low for overvoltage (>110%), undervoltage (<97%), thermal shutdown, or VIN below UVLO. PGOOD also asserts low if either buck is disabled or if the die temperature exceeds 165°C.
What are the key differences between Burst Mode®, pulse-skip, and forced continuous operation on the LTC3315BMPV#TRMPBF?
Burst Mode® maximizes light-load efficiency by cycling between active bursts and deep sleep; pulse-skip maintains constant frequency but skips cycles to regulate; forced continuous ensures fixed-frequency PWM with reverse inductor current allowed. Mode selection is controlled by the MODE/SYNC pin voltage: VIN = Burst, GND = pulse-skip, floating = forced continuous. All modes preserve 6MHz base frequency unless externally synchronized.
Can the LTC3315BMPV#TRMPBF operate with a 2.25V input supply?
Yes, the LTC3315BMPV#TRMPBF is fully specified to operate from 2.25V to 5.5V input. At 2.25V, it supports output voltages down to 0.5V using its 100% duty cycle capability and 25ns minimum on-time, enabling high step-down ratios even at low input. Input undervoltage lockout is set at 2.15V (rising) with 150mV hysteresis to ensure clean startup and brownout recovery.
LTC3315BMPV#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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315BMPV#TRMPBF FAQ
1.How can I place an order for LTC3315BMPV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315BMPV#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 LTC3315BMPV#TRMPBF reliable?
The price and inventory of LTC3315BMPV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315BMPV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3315BMPV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315BMPV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315BMPV#TRMPBF?
LTC3315BMPV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315BMPV#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 LTC3315BMPV#TRMPBF?
For technical support, including LTC3315BMPV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315BMPV#TRMPBF requirements.
6.How does Aetrix verify that LTC3315BMPV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315BMPV#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 LTC3315BMPV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3315BMPV#TRMPBF?
All LTC3315BMPV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315BMPV#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 LTC3315BMPV#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3315BMPV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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