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Analog Devices Inc. DC2990A
- Part No.:
- DC2990A
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC2990A.pdf
- Description:
- EVAL BOARD FOR LTC3307A
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Product details
Overview
LTC3307A from Analog Devices is a monolithic synchronous step-down DC/DC converter delivering up to 3A output current, operating from 2.25V to 5.5V input, regulating down to 0.5V with ±1% feedback accuracy, and featuring Silent Switcher architecture for ultralow EMI - used in FPGA core supplies, battery-powered systems, and POL applications.
For engineers reviewing the LTC3307A datasheet, LTC3307A pinout, LTC3307A application, or LTC3307A equivalent, key selection criteria include its 22ns minimum on-time, programmable 1–3MHz switching frequency, forced continuous/pulse-skipping/Burst Mode operation, 8mΩ NMOS / 31mΩ PMOS RDS(ON), and AEC-Q100 qualification for automotive use.
Technical Context
The LTC3307A employs constant-frequency peak current mode control with internal compensation, enabling fast transient response and stable regulation across wide load and input ranges. Its architecture supports three selectable operating modes via the MODE/SYNC pin: forced continuous (fixed-frequency, low-ripple), pulse-skipping (light-load efficiency), and Burst Mode (40µA IQ, low-noise sleep).
It integrates dual power switches with precise overcurrent protection (4.5–5.1A peak, 3.9A valley), output overvoltage detection (107–114% VOUT threshold), and thermal shutdown. The device synchronizes to external clocks (1–3MHz) with automatic slope compensation adaptation and supports 100% duty cycle for ultra-low dropout operation.
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 rail inputs without pre-regulation. |
| VOUT Range | 0.5V to VIN - enables direct core supply for modern FPGAs, ASICs, and microprocessors. |
| Output Accuracy | ±1% over temperature - ensures stable voltage margining for sensitive digital loads. |
| Switching Frequency | 1MHz to 3MHz (RT-programmable or SYNC) - allows compact magnetics and noise avoidance in sensitive RF bands. |
| Min On-Time | 22ns - enables high step-down ratios (e.g., 5V→0.5V at 2MHz) without pulse skipping. |
| IQ in Burst Mode | 40µA - extends battery runtime in always-on IoT and portable medical devices. |
| RDS(ON) | 8mΩ (NMOS) / 31mΩ (PMOS) - minimizes conduction loss and thermal rise at 3A full load. |
Pinout & Package
Available in thermally enhanced 12-lead 2mm × 2mm LQFN (0.74mm height, exposed PGND pad) and ultra-compact 16-pin 1.64mm × 1.64mm WLCSP (0.5mm height). Both packages support high-density PCB layouts and efficient thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1 / A2) | Analog ground reference | Remote sense return for FB; must connect directly to output capacitor negative terminal to reject PCB IR drop. |
| EN (Pin 2 / B2) | Enable control input | 400mV precision threshold with hysteresis - enables accurate power sequencing with resistor dividers. |
| VIN (Pins 3,8 / B1,B4) | Main input power supply | Dual pins reduce trace inductance and improve current sharing for high-efficiency operation. |
| PGND (Pins 4,7,13 / C1,C4,D1,D4) | Power ground return | Exposed pad (LQFN) or multiple terminals (WLCSP) provide low-inductance path for bottom switch return and thermal conduction. |
| SW (Pins 5,6 / C2,C3,D2,D3) | Switch node | High-current connection to inductor; requires short, wide copper pour to minimize EMI and ringing. |
| MODE/SYNC (Pin 9 / B3) | Mode selection & clock sync | Configures light-load behavior (Burst/Pulse-Skipping/Forced Continuous) or accepts 1–3MHz external clock. |
| RT (Pin 10 / A4) | Frequency programming | Resistor-to-AGND sets switching frequency; open or tied to VIN selects default ~2MHz operation. |
| PGOOD (Pin 11 / A3) | Power good indicator | Open-drain output asserts high when VOUT is within –2%/+10% window; includes 120µs delay and fault hysteresis. |
| FB (Pin 12 / A1) | Feedback input | Regulates to 500mV reference; connects to resistor divider from VOUT to AGND for precise output setting. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >30dB vs. conventional buck converters - eliminates need for metal shielding in space-constrained designs. |
| Low-ripple Burst Mode® | Delivers 40µA quiescent current while maintaining <10mVPP output ripple - ideal for noise-sensitive analog and RF subsystems. |
| 22ns minimum on-time | Enables 5V-to-0.5V conversion at 2MHz without frequency foldback - preserves transient response and simplifies loop design. |
| AEC-Q100 qualified variants | LTC3307AEV/LTC3307AIV rated for –40°C to +125°C junction - certified for automotive infotainment, ADAS camera modules, and body electronics. |
| Internal compensation | Eliminates external compensation components - reduces BOM count and layout sensitivity while ensuring stability across all operating conditions. |
Applications
| Optical Networking Power Supply | FPGA Core Voltage Regulation |
|---|---|
Use Scenario: Providing clean, tightly regulated 1.2V/3A supply to SerDes transceivers in 100G optical line cards. IC Role / Device Role: Primary point-of-load (POL) regulator with fast transient response and ultralow EMI to avoid signal integrity degradation. Use Value: 22ns min on-time and Silent Switcher architecture ensure stable 1.2V under 10A/µs load steps without compromising adjacent high-speed lanes. |
Use Scenario: Delivering dynamically scaled core voltage (0.75V–1.2V) to Xilinx Versal or Intel Agilex FPGAs in adaptive compute platforms. IC Role / Device Role: Digitally programmable, high-efficiency buck converter supporting dynamic voltage scaling (DVS) and low-quiescent sleep states. Use Value: ±1% VFB accuracy and 40µA Burst Mode IQ enable precise voltage margining and extended battery life in edge AI accelerators. |
| Automotive Camera Module | Industrial IoT Sensor Hub |
Use Scenario: Powering 5MP image sensor and ISP SoC in rear-view or surround-view cameras operating at –40°C to +105°C ambient. IC Role / Device Role: AEC-Q100 qualified POL regulator with integrated overvoltage/overtemperature protection and robust EMI immunity. Use Value: 100% duty cycle capability maintains regulation during cold-crank (VIN = 2.25V), while thermal shutdown prevents field failures in sealed enclosures. |
Use Scenario: Supplying 3.3V/2A and 1.8V/1A rails to ARM Cortex-M7 MCU, LoRa transceiver, and MEMS sensors in battery-backed industrial gateways. IC Role / Device Role: Dual-rail capable, low-IQ DC/DC converter supporting long-term deployment in remote locations with minimal maintenance. Use Value: 40µA IQ in Burst Mode extends 2xAA battery life beyond 5 years; WLCSP package enables coin-cell-sized form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62864 (Texas Instruments) | 4A output, 2.7–6V input, 1.8–5.5V fixed VOUT options; no RT programming; 15µA IQ in DCM. | Lacks programmable VOUT and external SYNC; optimized for fixed-output consumer apps, not precision POL. | Select when fixed 3.3V/1.8V outputs suffice and board space is constrained - but verify EMI compliance separately. |
| MP2144GQ (Monolithic Power) | 3A, 2.5–5.5V input, 0.6–5.5V VOUT; 25ns min on-time; no Burst Mode; 25µA IQ in skip mode. | No AEC-Q100 grade; higher EMI; lacks PGOOD hysteresis and overvoltage protection. | Consider for cost-sensitive industrial designs where automotive qualification and ultralow EMI are not required. |
Compared with TPS62864 and MP2144GQ, the LTC3307A uniquely combines AEC-Q100 qualification, Silent Switcher EMI reduction, programmable frequency, and true 0.5V output capability - making it the preferred choice for safety-critical, high-density, and noise-sensitive embedded systems.
Availability
LTC3307A is available at Aetrix Electronics and suitable for FPGA core supplies, automotive camera modules, and industrial IoT sensor hubs requiring stable component supply, long-lifecycle support, and guaranteed AEC-Q100 compliance.
Supply support for LTC3307A 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 (now part of Analog Devices, Inc., a global leader in high-performance analog, mixed-signal, and digital signal processing technologies) designs precision power management ICs for demanding applications.
The LTC3307A belongs to the Silent Switcher family of high-efficiency, low-EMI DC/DC converters engineered specifically for space-constrained, noise-sensitive systems including automotive ADAS, optical networking, and portable medical devices.
FAQ
What is the minimum input voltage supported by the LTC3307A?
The LTC3307A supports a minimum input voltage of 2.25V, enabling reliable operation during automotive cold-crank events and single-cell Li-ion battery discharge down to 2.5V. This specification is guaranteed across the full –40°C to +125°C junction temperature range for LTC3307AEV and LTC3307AIV grades.
Does the LTC3307A require external compensation components?
No, the LTC3307A features fully internal compensation, eliminating the need for external Type-II or Type-III compensation networks. This simplifies design, reduces BOM count, and ensures stable operation across all input voltages, output loads, and temperatures without tuning.
How does the MODE/SYNC pin configure operating modes on the LTC3307A?
The MODE/SYNC pin configures three distinct modes: grounded → pulse-skipping; tied to VIN → Burst Mode (40µA IQ); floating → forced continuous mode. When driven by an external 1–3MHz clock, it synchronizes switching and forces continuous operation with auto-adapted slope compensation.
What package options are available for the LTC3307A?
The LTC3307A is offered in two package types: a 12-lead 2mm × 2mm LQFN with exposed PGND pad (θJA = 51°C/W), and a 16-pin 1.64mm × 1.64mm WLCSP (θJA = 58°C/W). Both support reflow soldering per J-STD-020 and are RoHS-compliant.
Is the LTC3307A qualified for automotive applications?
Yes - the LTC3307AEV and LTC3307AIV variants are AEC-Q100 qualified for Grade 1 (–40°C to +125°C) operation and are approved for use in automotive infotainment, ADAS camera modules, and body electronics. Automotive-grade ordering codes include #W suffixes (e.g., LTC3307AEV#WTRPBF).
DC2990A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 1.2V
- Voltage - Input:
- 3A
- Regulator Topology:
- 2.25V ~ 5.5V
- Frequency - Switching:
- Buck
- Contents:
- 2MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- LTC3307A
DC2990A FAQ
1.How can I place an order for DC2990A through Aetrix?
Please submit a Request for Quotation (RFQ) for DC2990A 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 DC2990A reliable?
The price and inventory of DC2990A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC2990A is usually 5 days.
3.What payment methods are accepted for DC2990A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC2990A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC2990A?
DC2990A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC2990A 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 DC2990A?
For technical support, including DC2990A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC2990A requirements.
6.How does Aetrix verify that DC2990A is sourced from the original manufacturer or authorized distributors?
All DC2990A 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 DC2990A meets industry standards.
7.What is the process for return or replacement of DC2990A?
All DC2990A units undergo pre-shipment inspection (PSI). If there is an issue with DC2990A, 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 DC2990A part is unused and in its original packaging.
Return procedure for DC2990A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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