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Analog Devices Inc. LT3495BEDDB-1#TRPBF
- Part No.:
- LT3495BEDDB-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT3495BEDDB-1#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 275MA 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT3495BEDDB-1#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, low-noise boost converter IC with integrated 350mA NPN power switch, internal feedback resistor (76kΩ), and output disconnect PMOS. It operates from 2.5V to 16V input, delivers up to 40V output, maintains switching frequency >45kHz across load range, and draws only 60µA quiescent current-enabling efficient OLED power supply from a single Li-ion cell.
For engineers reviewing the LT3495BEDDB-1#TRPBF datasheet, LT3495BEDDB-1#TRPBF pinout, LT3495BEDDB-1#TRPBF application, or LT3495BEDDB-1#TRPBF equivalent, key selection criteria include its fixed 350mA switch current limit, guaranteed audio-band–free operation, integrated output disconnect, CTRL-pin–enabled dimming control, and 10-lead 3mm × 2mm DFN package with exposed thermal pad.
Technical Context
The LT3495BEDDB-1#TRPBF employs a variable peak-current, variable off-time control architecture that dynamically adjusts both inductor peak current and switch off-time to maintain high efficiency and low output ripple across wide load ranges. Its minimum off-time is fixed at 200ns (after start-up), and maximum off-time is 35µs-ensuring switching frequency remains above ~45kHz under all operating conditions.
This variant belongs to the LT3495-1 subfamily and features a 350mA typical switch current limit (vs. 650mA in LT3495/LT3495B), 1.235V internal FB reference with ±15mV tolerance over temperature, and an auxiliary CTRL pin that overrides the reference down to 0V for real-time output voltage dimming-critical for OLED display brightness control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 16V - supports direct operation from Li-ion (3.0–4.2V), 5V rails, and industrial 12V inputs. |
| Output Voltage Range | Up to 40V - enables driving high-voltage OLED panels and white LED strings without external components. |
| Switch Current Limit | 350mA typical - defines maximum inductor peak current; determines max output power at given VIN/VOUT ratio. |
| Quiescent Current | 60µA active / <0.1µA shutdown - enables multi-week battery life in portable devices with periodic wake-up. |
| FB Reference Voltage | 1.235V ±15mV - precision internal reference used with external top resistor to set output voltage. |
| CTRL Pin Bias Current | <100nA - allows high-impedance dimming control sources (e.g., DACs, microcontroller GPIO) without loading error. |
| Minimum Switching Frequency | >45kHz - prevents audible noise in sensitive audio/display applications; avoids EMI in 20–200kHz band. |
| Package | 10-lead 3mm × 2mm DFN with exposed thermal pad - provides low θJA (76°C/W) for thermally constrained space-constrained designs. |
Pinout & Package
LT3495BEDDB-1#TRPBF is housed in a 10-lead plastic DFN package (3mm × 2mm) with exposed thermal pad (Pin 11) that must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 2) | Power and signal ground reference | Low-impedance return path for switch, feedback, and control circuits; tie directly to local ground plane. |
| VCC (Pin 3) | Main input supply | Accepts 2.5–16V; requires local ceramic bypass capacitor (≥4.7µF) to minimize input ripple and EMI. |
| CTRL (Pin 4) | Auxiliary reference override | Drives FB node to match applied voltage (0–1.235V); enables analog dimming without external op-amp. |
| SHDN (Pin 5) | Enable/disable control | Logic-high (>1.5V) enables operation; logic-low (<0.3V) disables switch and activates output disconnect. |
| FB (Pin 6) | Feedback sensing node | Monitors divided output voltage; internal 76kΩ resistor to GND sets reference point for R1-based VOUT programming. |
| VOUT (Pin 7) | PMOS drain output | Delivers regulated output; connects to load when enabled; floats to GND during shutdown via PMOS disconnect. |
| CAP (Pins 8, 9) | PMOS source / boost capacitor node | Connects to boost capacitor and Schottky diode anode; carries full inductor current; requires ≥2.2µF local ceramic cap. |
| SW (Pin 10) | Internal NPN collector | Switching node with fast edges; trace must be short and shielded to minimize EMI and ringing. |
| Exposed Pad (Pin 11) | Thermal & electrical ground | Must be soldered to PCB ground plane; critical for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated output disconnect PMOS | Isolates VOUT from CAP during shutdown-prevents backfeed and enables true zero-load leakage in battery-powered systems. |
| CTRL-pin–based analog dimming | Allows continuous, noise-free output voltage adjustment from full scale down to near-VIN-ideal for OLED contrast/brightness control. |
| Fixed minimum switching frequency | Guarantees >45kHz operation across full load range-eliminates audible coil whine and simplifies EMI filtering. |
| Ultra-low quiescent current | 60µA active mode enables >1-year battery life in always-on sensor nodes with 20µA average load. |
| Integrated 76kΩ feedback resistor | Reduces BOM count and layout sensitivity; enables single-resistor VOUT programming with predictable accuracy. |
| Robust start-up and shunt control | Prevents output overvoltage during light-load conditions via adaptive internal shunt-no external Zener or divider needed. |
Applications
| OLED Display Power Supply | Portable Audio Device Power |
|---|---|
Use Scenario: Powering RGB OLED panels in smartwatches and AR glasses from a single 3.6V Li-ion cell. IC Role / Device Role / Timing Role: Boost converter generating stable 12–18V rail with <50mVpp ripple and <1% load regulation. Use Value: Enables high-contrast, flicker-free display operation while extending battery runtime beyond 3 days per charge. | Use Scenario: Supplying clean, low-noise bias voltage to Class-D amplifier stages in Bluetooth headphones. IC Role / Device Role / Timing Role: Low-EMI boost regulator delivering 10V@150mA with <10µV RMS noise floor. Use Value: Eliminates audible switching artifacts and preserves SNR >110dB in audio signal chain. |
| MP3 Player Backlight Driver | Industrial Sensor Node Power |
Use Scenario: Driving white LED backlight in handheld media players requiring adjustable brightness. IC Role / Device Role / Timing Role: Dimmable boost controller using CTRL pin for PWM-free analog intensity control. Use Value: Provides smooth, stepless brightness scaling without PWM-induced EMI or display flicker. | Use Scenario: Providing regulated 5V/3.3V supply to ultra-low-power MCU and RF transceiver in wireless sensor nodes. IC Role / Device Role / Timing Role: Micropower DC-DC converter with <0.1µA shutdown current and fast wake-up response. Use Value: Extends 10-year battery life in sealed environmental monitoring deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3526LEDE-1#TRMPBF | Higher 600mA switch limit; 2MHz fixed-frequency; no integrated disconnect; 16-pin QFN | Better suited for higher-output-current, space-tolerant designs; lacks output isolation during shutdown | Select when >350mA load current or faster transient response is required; not drop-in due to different pinout and no disconnect. |
| TPS61040DRVR | 500mA switch; 1.2MHz fixed frequency; no CTRL dimming; no integrated disconnect; 6-pin SOT-23 | Compact, cost-optimized solution for non-dimming, medium-current apps; no shutdown isolation | Choose for simpler, lower-cost designs where output disconnect and analog dimming are unnecessary. |
Compared with LTC3526LEDE-1#TRMPBF and TPS61040DRVR, LT3495BEDDB-1#TRPBF uniquely combines 350mA capability with guaranteed audio-band–free operation, integrated output disconnect, and analog dimming-making it optimal for battery-powered displays requiring silent, isolated, and controllable power.
Availability
LT3495BEDDB-1#TRPBF is available at Aetrix Electronics and suitable for OLED display power, portable audio bias supplies, MP3 player backlight drivers, and industrial sensor node power requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for LT3495BEDDB-1#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LT3495 series was designed specifically for low-noise, micropower boost conversion in portable display and audio applications-emphasizing silent operation, output isolation, and analog dimming control without external circuitry.
FAQ
What is the maximum output voltage supported by the LT3495BEDDB-1#TRPBF?
The LT3495BEDDB-1#TRPBF supports output voltages up to 40V, as confirmed by its absolute maximum SW and VOUT ratings. This enables direct driving of high-voltage OLED panels and LED strings. Operation at 40V requires careful attention to capacitor voltage derating, PCB creepage, and thermal management-especially at high load currents where PMOS conduction loss increases.
Does the LT3495BEDDB-1#TRPBF provide true output disconnect during shutdown?
Yes, the LT3495BEDDB-1#TRPBF integrates a PMOS output disconnect switch that isolates VOUT from CAP during shutdown, allowing VOUT to discharge to ground. This feature eliminates backfeed and ensures zero-load leakage-critical for battery-powered systems. The PMOS remains fully off until VCAP – VOUT exceeds 8.7V, beyond which current limiting ceases.
How does the CTRL pin function in the LT3495BEDDB-1#TRPBF?
The CTRL pin on the LT3495BEDDB-1#TRPBF serves as an auxiliary reference input that overrides the internal 1.235V FB reference when driven between 0V and 1.235V. This enables real-time analog dimming of the output voltage without external op-amps or DACs. At CTRL = 0.8V, for example, the LT3495BEDDB-1#TRPBF regulates VOUT to match the FB voltage, yielding precise, noise-free brightness control.
What is the switch current limit specification for the LT3495BEDDB-1#TRPBF?
The LT3495BEDDB-1#TRPBF has a typical switch current limit of 350mA, with a guaranteed minimum of 275mA and maximum of 450mA over temperature. This value is fixed for the LT3495-1/LT3495B-1 family and distinguishes it from the 650mA-limited LT3495/LT3495B variants. It directly constrains peak inductor current and thus maximum deliverable output power at a given input-output voltage ratio.
Can the LT3495BEDDB-1#TRPBF operate without a minimum load?
No-the LT3495BEDDB-1#TRPBF (like all LT3495-1 variants) requires a minimum output load under certain conditions to prevent output overvoltage, because its minimum switching frequency is enforced at ~45kHz. When VIN and VOUT are close (e.g., 3.6V → 5V), the internal shunt may be insufficient; a small resistive load (~100kΩ) on VOUT ensures regulation stability without impacting efficiency at full load.
LT3495BEDDB-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 275mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LT3495BEDDB-1#TRPBF FAQ
1.How can I place an order for LT3495BEDDB-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3495BEDDB-1#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 LT3495BEDDB-1#TRPBF reliable?
The price and inventory of LT3495BEDDB-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3495BEDDB-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3495BEDDB-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3495BEDDB-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3495BEDDB-1#TRPBF?
LT3495BEDDB-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3495BEDDB-1#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 LT3495BEDDB-1#TRPBF?
For technical support, including LT3495BEDDB-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3495BEDDB-1#TRPBF requirements.
6.How does Aetrix verify that LT3495BEDDB-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3495BEDDB-1#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 LT3495BEDDB-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3495BEDDB-1#TRPBF?
All LT3495BEDDB-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3495BEDDB-1#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 LT3495BEDDB-1#TRPBF part is unused and in its original packaging.
Return procedure for LT3495BEDDB-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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