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Analog Devices Inc. LTC3315BMPV#TRPBF
- Part No.:
- LTC3315BMPV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-VFQFN Exposed Pad
- Datasheet:
-
LTC3315BMPV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A/2A DL 12LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,011
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Product details
Overview
LTC3315BMPV#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, regulating outputs as low as 0.5V with ±1% accuracy, operating at 6MHz fixed frequency (synchronizable up to 10MHz), and featuring 19mΩ NMOS / 75mΩ PMOS integrated power switches - deployed in FPGA core supplies, automotive infotainment power rails, and space-constrained POL systems.
For engineers reviewing the LTC3315BMPV#TRPBF datasheet, LTC3315BMPV#TRPBF pinout, LTC3315BMPV#TRPBF application, or LTC3315BMPV#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature grade, 25ns minimum on-time for high VIN/VOUT ratios, dual-phase 180° interleaving for reduced input ripple, and Burst Mode® operation enabling <1.2µA shutdown current while maintaining fast transient response.
Technical Context
The LTC3315BMPV#TRPBF integrates two independent peak-current-mode buck regulators sharing a common oscillator and MODE/SYNC control logic, with 180° phase interleaving to minimize input capacitor RMS current and improve thermal distribution. Each channel features separate EN, FB, and SW pins, internal soft-start, and precision 500mV feedback reference with ±1% regulation accuracy over temperature.
It supports three operating modes via the MODE/SYNC pin: forced continuous (fixed-frequency PWM), pulse-skipping (light-load efficiency), and Burst Mode® (ultra-low quiescent current). Synchronization to external clocks from 3MHz to 10MHz is achieved via PLL-based locking, with automatic slope compensation adaptation and guaranteed forced-continuous operation during sync.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.25V to 5.5V - supports single-cell Li-ion, USB PD, and 3.3V/5V intermediate bus architectures without pre-regulation. |
| Output Current (per channel) | 2A continuous - enables compact dual-rail power delivery for FPGA I/O banks or dual-core processors. |
| Switching Frequency | 6MHz typical (3–10MHz sync range) - allows use of sub-470nH inductors and 10µF ceramic output capacitors in <12mm² footprint. |
| Feedback Voltage | 500mV ±5mV - enables precise low-VOUT regulation (e.g., 0.5V core supplies) with minimal resistor divider error sensitivity. |
| Min On-Time | 25ns - supports high step-down ratios (e.g., 5.5V→0.5V at 6MHz) without pulse skipping or instability. |
| Shutdown Current | 1.2µA - extends battery life in always-on automotive modules and IoT edge nodes during deep sleep. |
| Thermal Rating | –55°C to 150°C junction - qualified for under-hood automotive applications and industrial control environments. |
Pinout & Package
Package: 12-lead 2mm × 2mm × 0.74mm LQFN with exposed thermal pad (Pin 13 = GND), MSL Level 3, rated θJA = 51°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Independent enable inputs (active-high) | Enable sequencing control with 400mV precision threshold; supports resistor-divider biasing from upstream rails for controlled power-up order. |
| FB1, FB2 | Feedback inputs | Regulate VOUT to 500mV reference; each channel closed-loop independently for mismatched output voltages (e.g., 1.8V + 2.0V). |
| SW1, SW2 | Switch node outputs | Drive external inductors; require short, wide PCB traces to minimize EMI and switching losses; support 100% duty cycle for dropout operation. |
| VIN (Pins 7, 10) | Input supply | Dual VIN pins reduce IR drop and improve current sharing; must be bypassed locally with low-ESR ceramics near each pin. |
| GND (Pins 8, 9, 13) | Ground terminals | Three GND connections including thermally enhanced exposed pad - mandatory soldering to inner/outer ground planes for thermal performance and noise immunity. |
| PGOOD | Open-drain power-good output | Asserts high only when both enabled channels are within 97–99% of target VOUT and no overvoltage (>110%) or thermal fault exists. |
| MODE/SYNC | Mode selection & sync input | Configures operating mode (low = pulse-skip, high = Burst Mode®, float = forced continuous); accepts 3–10MHz external clock for system-level timing alignment. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous bucks in 2mm × 2mm | Enables dual-rail POL conversion in <12mm² area - critical for camera modules, ADAS ECUs, and compact telecom line cards. |
| 180° interleaved switching | Reduces input ripple current by ~70% vs. non-interleaved dual bucks, allowing smaller input capacitors and lower EMI filtering cost. |
| Burst Mode® with <1.2µA shutdown | Extends runtime in battery-backed systems (e.g., telematics black boxes) while maintaining <120µs PGOOD fault detection latency. |
| Integrated 19mΩ NMOS / 75mΩ PMOS | Delivers >90% efficiency at 2A/1.8V out from 3.3V in without external MOSFETs or gate drivers - simplifies BOM and layout. |
| Output overvoltage protection (OVP) | Shuts off PMOS within nanoseconds if FB exceeds 110% VOUT - prevents damage to downstream 1.8V/2.5V logic in fault conditions. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications including infotainment, body control, and ADAS sensor power - meets stress test requirements across –40°C to 125°C ambient. |
Applications
| Automotive Infotainment Power | FPGA Core & I/O Supply |
|---|---|
Use Scenario: Dual-rail power for SoC + DDR interface in head-unit systems requiring isolated 1.2V core and 1.8V I/O rails with tight sequencing. IC Role / Device Role / Timing Role: Primary dual-output POL regulator providing tightly regulated, low-noise, and sequenced voltage rails synchronized to MCU boot sequence. Use Value: Eliminates need for discrete sequencing ICs; 180° phase reduces input ripple by 70%, easing EMI compliance for CISPR 25 Class 5. |
Use Scenario: Compact power solution for Xilinx Artix-7 or Intel MAX 10 FPGA requiring independent 1.0V core and 3.3V I/O supplies on dense PCBs. IC Role / Device Role / Timing Role: Monolithic dual-buck delivering matched transient response and soft-start ramp control for simultaneous rail startup. Use Value: 25ns min-on-time supports 5.5V→1.0V conversion at 6MHz; internal compensation avoids external type-II networks. |
| Industrial Sensor Hub | Optical Networking Module |
Use Scenario: Powering mixed-signal sensor fusion boards (IMU, pressure, temp) with ultra-low quiescent current demands in battery-operated field devices. IC Role / Device Role / Timing Role: Always-on dual-buck supplying 3.3V analog front-end and 1.8V digital logic, entering Burst Mode® between sensor reads. Use Value: 1.2µA shutdown current extends 10-year battery life; PGOOD monitors both rails for predictive maintenance alerts. |
Use Scenario: Distributed 5V-to-3.3V/2.5V conversion in pluggable SFP+ transceivers where board space and thermal density are constrained. IC Role / Device Role / Timing Role: High-frequency dual-buck operating at 6MHz to fit within 12mm × 12mm module envelope and meet IEEE 802.3 compliance. Use Value: 2mm × 2mm footprint saves >40% area vs. discrete solutions; thermal pad ensures <12°C/W junction-to-board resistance. |
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 |
|---|---|---|---|
| TPS62150ARGTR | Single 2A buck, 3–17V input, 2.5MHz max fSW, no dual-channel or sync capability | Suitable only for single-rail designs; lacks interleaving, PGOOD aggregation, or automotive temp grade | Select only when dual-rail functionality is unnecessary and board space allows larger inductor size. |
| MAX20404ATPA/VY+ | Dual 3A buck, 2.7–16V input, 2.2MHz default fSW, supports spread-spectrum but no Burst Mode® | Higher current per channel but larger 3mm × 3mm package; higher quiescent current (12µA) limits battery use | Prefer for higher-current industrial PLCs where 150°C operation is not required and EMI spread-spectrum is prioritized. |
Compared with TPS62150ARGTR and MAX20404ATPA/VY+, the LTC3315BMPV#TRPBF uniquely combines dual 2A channels, 6MHz operation, –55°C to 150°C rating, and sub-µA shutdown in a 2mm × 2mm footprint - making it optimal for space- and thermal-constrained automotive and optical networking applications requiring precise dual-rail control.
Availability
LTC3315BMPV#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, FPGA power delivery, and optical transceiver modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3315BMPV#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 precision instrumentation, industrial automation, communications, and automotive markets.
The LTC3315B series is part of Analog Devices' Power by Linear™ portfolio, designed specifically for high-density, high-efficiency point-of-load regulation in automotive, telecom, and computing applications demanding ultra-small footprints and extended temperature reliability.
FAQ
What is the operating temperature range of the LTC3315BMPV#TRPBF?
The LTC3315BMPV#TRPBF is specified for a junction temperature range of –55°C to 150°C and is qualified per AEC-Q100 Grade 1 standards. This extended range supports under-hood automotive applications, industrial control cabinets, and optical modules exposed to harsh thermal environments. Its thermal pad (Pin 13) must be soldered to a solid ground plane to achieve the rated θJB = 12°C/W.
How does the MODE/SYNC pin configure operating modes on the LTC3315BMPV#TRPBF?
The MODE/SYNC pin sets all dual buck channels to the same mode: grounded for pulse-skipping, tied to VIN for Burst Mode®, or left floating for forced continuous conduction. When driven by an external 3–10MHz clock, the LTC3315BMPV#TRPBF enters forced continuous mode with PLL-based synchronization and automatic slope compensation adjustment - ensuring stable operation without manual loop tuning.
Can the LTC3315BMPV#TRPBF regulate outputs below 1V?
Yes - the LTC3315BMPV#TRPBF regulates outputs down to 0.5V using its precision 500mV feedback reference. With standard resistor dividers (e.g., 100kΩ top / 100kΩ bottom for 1.0V), it achieves ±1% output accuracy across load, line, and temperature. For sub-1V rails like 0.85V FPGA cores, use low-tolerance resistors (<0.5%) and guard against PCB leakage currents near FB pins.
What protection features are integrated into the LTC3315BMPV#TRPBF?
The LTC3315BMPV#TRPBF includes output overvoltage protection (shuts off PMOS if FB >110% VOUT), thermal shutdown (165°C trip, 160°C hysteresis), short-circuit protection, and undervoltage lockout (2.05V rising threshold). It also provides PGOOD monitoring with 120µs fault filtering and dual-rail fault aggregation - pulling PGOOD low if either enabled channel fails regulation or exceeds OVP thresholds.
Is the LTC3315BMPV#TRPBF pin-compatible with other variants in the LTC3315B family?
Yes - all LTC3315B variants (e.g., LTC3315BEV#TRPBF, LTC3315BIV#TRPBF, LTC3315BMPV#TRPBF) share identical 12-lead 2mm × 2mm LQFN pinouts and electrical functionality. The only differences are temperature grading and packaging markings; the LTC3315BMPV#TRPBF is the –55°C to 150°C extended-grade version with MP marking, fully substitutable in footprint and function.
LTC3315BMPV#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:
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LQFN (2x2)
LTC3315BMPV#TRPBF FAQ
1.How can I place an order for LTC3315BMPV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3315BMPV#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 LTC3315BMPV#TRPBF reliable?
The price and inventory of LTC3315BMPV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3315BMPV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3315BMPV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3315BMPV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3315BMPV#TRPBF?
LTC3315BMPV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3315BMPV#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 LTC3315BMPV#TRPBF?
For technical support, including LTC3315BMPV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3315BMPV#TRPBF requirements.
6.How does Aetrix verify that LTC3315BMPV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3315BMPV#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 LTC3315BMPV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3315BMPV#TRPBF?
All LTC3315BMPV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3315BMPV#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 LTC3315BMPV#TRPBF part is unused and in its original packaging.
Return procedure for LTC3315BMPV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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