My Inquiry
My Account
Analog Devices Inc. LT3495EDDB#TRPBF
- Part No.:
- LT3495EDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT3495EDDB#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 550MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,446
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3495EDDB#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, low-noise boost converter IC with integrated 650mA NPN switch, output disconnect PMOS, and internal 76kΩ feedback resistor. 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 LT3495EDDB#TRPBF datasheet, LT3495EDDB#TRPBF pinout, LT3495EDDB#TRPBF application, or LT3495EDDB#TRPBF equivalent, key selection criteria include its fixed 650mA switch current limit (vs. 350mA in -1 variants), guaranteed audio-band–free operation, integrated output disconnect for true shutdown isolation, and CTRL-pin–enabled analog dimming control of regulated output voltage.
Technical Context
The LT3495EDDB#TRPBF employs a variable peak-current, variable off-time control architecture that dynamically adjusts both inductor peak current and switch off-time to maintain regulation while minimizing output ripple and maximizing efficiency across wide load ranges. Its minimum off-time constraint ensures switching frequency remains ≥45kHz under all operating conditions, eliminating audible noise.
It integrates a precision 1.235V internal reference, a 76kΩ bottom feedback resistor, and an auxiliary CTRL pin that overrides the reference down to 0V - enabling real-time output voltage adjustment for display dimming. The PMOS-based output disconnect isolates VOUT from CAP during shutdown, reducing leakage to <0.1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 16V - supports direct operation from single Li-ion (3.0–4.2V) or multi-cell battery stacks. |
| Output Voltage Range | Up to 40V - enables driving high-voltage OLED panels or white LED strings without external components. |
| Switch Current Limit | 650mA typical - defines maximum inductor peak current; determines max output power at given VIN/VOUT ratio. |
| Quiescent Current | 60µA active / <0.1µA shutdown - preserves battery life in always-on portable devices with infrequent wake cycles. |
| Minimum Switching Frequency | ≥45kHz - guarantees operation above audible range; eliminates coil whine in consumer audio-adjacent applications. |
| FB Reference Voltage | 1.235V ±15mV - sets base output voltage via external top resistor; enables accurate, stable regulation. |
| Package | 10-lead 3mm × 2mm DFN with exposed pad - provides low thermal resistance (θJA = 76°C/W) and compact footprint for space-constrained designs. |
Pinout & Package
LT3495EDDB#TRPBF is housed in a 10-lead 3mm × 2mm plastic DFN package (DDB) 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; requires direct connection to local ground plane. |
| VCC (Pin 3) | Main input supply input | Accepts 2.5–16V; must be locally bypassed with ceramic capacitor to suppress switching transients. |
| CTRL (Pin 4) | Auxiliary reference override input | Drives FB to match CTRL voltage (0–1.235V) for analog dimming; bias current <100nA enables high-impedance RC soft-start networks. |
| SHDN (Pin 5) | Enable/disable control input | Logic-high (≥1.5V) enables operation; logic-low (≤0.3V) initiates shutdown with <0.1µA quiescent draw and PMOS disconnect. |
| FB (Pin 6) | Feedback node for output regulation | Senses divided output voltage; internal 76kΩ resistor to GND simplifies design; trace area must be minimized to reduce noise coupling. |
| VOUT (Pin 7) | PMOS drain output terminal | Connects to load; voltage isolated from CAP during shutdown; used for VOUT-referenced feedback to eliminate PMOS drop error. |
| CAP (Pins 8, 9) | PMOS source and boost capacitor node | Connects to boost capacitor and inductor; carries full switching current; requires low-ESR ceramic capacitor (e.g., 2.2µF). |
| SW (Pin 10) | Internal NPN switch collector | High-di/dt node; connects to inductor and Schottky diode anode; trace length and loop area must be minimized to reduce EMI. |
| Exposed Pad (Pin 11) | Thermal and electrical ground | Must be soldered to PCB ground plane; critical for thermal dissipation (TJMAX = 125°C) and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated output disconnect PMOS | Isolates VOUT from CAP during shutdown, enabling true zero-load leakage and safe system-level power sequencing. |
| CTRL-pin–enabled analog dimming | Allows continuous, noise-free output voltage reduction from full setpoint down to near-VIN level for OLED brightness control. |
| Fixed minimum switching frequency (≥45kHz) | Eliminates audible coil whine in portable audio, medical, and instrumentation systems without requiring external frequency dithering. |
| 60µA quiescent current | Extends battery runtime in always-on wearable and IoT sensors where duty-cycled operation dominates. |
| Integrated 76kΩ feedback resistor | Reduces BOM count and layout sensitivity by eliminating one external component while maintaining 1.235V reference accuracy. |
Applications
| OLED Display Power Supply | Portable Audio Device Power |
|---|---|
|
Use Scenario: Generating stable 12–16V bias from a 3.6V Li-ion cell to drive passive-matrix OLED displays in smartwatches and wearables. IC Role / Device Role / Timing Role: Primary DC/DC boost regulator with integrated output disconnect and analog dimming control. Use Value: Enables flicker-free, low-noise brightness control while maintaining >85% efficiency at 5–70mA loads and extending battery life via 60µA quiescent draw. |
Use Scenario: Providing clean, low-ripple 5–12V rail for Class-D amplifier bias and DAC reference in Bluetooth speakers and portable headphones. IC Role / Device Role / Timing Role: Low-noise boost converter with guaranteed >45kHz switching to avoid interference with audio band (20Hz–20kHz). Use Value: Prevents audible switching artifacts in audio output; integrated PMOS disconnect avoids cross-conduction during power-down sequencing. |
| MP3 Player Backlight Driver | Industrial Sensor Node Bias Supply |
|
Use Scenario: Driving white LED backlight arrays in handheld media players using adjustable output voltage for dynamic contrast control. IC Role / Device Role / Timing Role: Programmable boost controller with CTRL-pin dimming interface and shutdown isolation. Use Value: Replaces discrete PWM + LDO solution; achieves smooth analog dimming without PWM-induced EMI or visible flicker. |
Use Scenario: Generating 3.3V or 5V from a 3.6V primary battery for ultra-low-power sensor signal conditioning and wireless MCU in remote monitoring nodes. IC Role / Device Role / Timing Role: Micropower boost regulator with sub-1µA shutdown current and robust start-up under weak-source conditions. Use Value: Supports 10+ year battery life in maintenance-free deployments; internal shunt control prevents output overvoltage during light-load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3495EDDB-1#TRPBF | 350mA switch current limit; same package and pinout; identical CTRL/SHDN/FB functionality. | Lower max output power; suitable for ≤30mA OLED or LED loads where 650mA capability is unnecessary. | Select when lower peak current suffices - reduces inductor size/cost and improves light-load efficiency at reduced power budget. |
| LT3495BEDDB#TRPBF | No minimum switching frequency constraint; allows zero-frequency operation under no-load; same 650mA limit and package. | Eliminates need for minimum output load; preferred in applications with highly variable or intermittent loading. | Choose when system may operate at near-zero load for extended periods and output overvoltage must be avoided without external load. |
Compared with LT3495EDDB-1#TRPBF, LT3495EDDB#TRPBF delivers higher output current capability but requires attention to minimum load conditions; compared with LT3495BEDDB#TRPBF, it guarantees audio-band–free operation at the cost of requiring a small minimum load in some configurations.
Availability
LT3495EDDB#TRPBF is available at Aetrix Electronics and suitable for OLED display power, portable audio bias, MP3 player backlighting, and industrial sensor node applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for LT3495EDDB#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, serving industrial, automotive, communications, and healthcare markets.
The LT3495 series belongs to Linear's micropower DC/DC converter product line, designed specifically for battery-powered portable electronics requiring ultra-low quiescent current, low-noise operation, and integrated power-path control.
FAQ
What is the maximum output voltage supported by the LT3495EDDB#TRPBF?
The LT3495EDDB#TRPBF supports output voltages up to 40V, as confirmed by its absolute maximum SW and VOUT ratings. This enables direct powering of high-voltage OLED panels or white LED strings without additional regulation stages. The actual achievable output depends on input voltage, inductor selection, and load - for example, with 3.6V input and 16V output, it delivers up to 70mA efficiently. Always verify stability and thermal limits at target VOUT using the recommended layout and component values from the datasheet.
How does the CTRL pin function in the LT3495EDDB#TRPBF?
The CTRL pin on the LT3495EDDB#TRPBF serves as an auxiliary reference input that overrides the internal 1.235V feedback reference when driven below 1.235V. When used, the FB pin regulates to match the CTRL voltage - enabling precise analog dimming of the output. For instance, driving CTRL to 0.6V sets VOUT ≈ 0.6V × (1 + R1/76kΩ). The pin draws less than 100nA, allowing simple RC networks for soft-start or potentiometer-based brightness control without loading the source.
Does the LT3495EDDB#TRPBF require an external feedback resistor?
Yes, the LT3495EDDB#TRPBF requires one external top feedback resistor (R1) connected between VOUT and FB. Its internal 76kΩ bottom resistor forms a divider with R1 to set output voltage per the formula R1 = 76kΩ × (VOUT/1.235 – 1). For a 16V output, R1 = 909kΩ. No second resistor is needed - the internal 76kΩ replaces the traditional bottom leg, reducing component count and improving accuracy by eliminating external resistor tolerance and temperature drift effects.
What is the purpose of the exposed pad (Pin 11) on the LT3495EDDB#TRPBF?
The exposed pad (Pin 11) on the LT3495EDDB#TRPBF is electrically and thermally connected to GND and must be soldered to a PCB ground plane. It reduces thermal resistance (θJA = 76°C/W) to maintain junction temperature within 125°C under full load, and provides low-inductance grounding for high-frequency switch currents. Omitting this connection risks thermal shutdown, reduced efficiency, and increased output ripple due to elevated ground impedance in the SW and CAP return paths.
Can the LT3495EDDB#TRPBF be used without an external Schottky diode?
No - the LT3495EDDB#TRPBF requires an external Schottky diode (e.g., Diodes Inc. B0540WS-7) connected between SW and VOUT/CAP. Unlike synchronous boost converters, it uses an internal NPN switch and relies on the external diode for flyback current path during switch-off. Omitting the diode prevents energy transfer, causes catastrophic failure due to voltage spikes at SW, and violates absolute maximum ratings. The diode must handle ≥0.5A average current and ≥40V reverse voltage with low forward drop to preserve efficiency.
LT3495EDDB#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:
- 550mA (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)
LT3495EDDB#TRPBF FAQ
1.How can I place an order for LT3495EDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3495EDDB#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 LT3495EDDB#TRPBF reliable?
The price and inventory of LT3495EDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3495EDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3495EDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3495EDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3495EDDB#TRPBF?
LT3495EDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3495EDDB#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 LT3495EDDB#TRPBF?
For technical support, including LT3495EDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3495EDDB#TRPBF requirements.
6.How does Aetrix verify that LT3495EDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3495EDDB#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 LT3495EDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3495EDDB#TRPBF?
All LT3495EDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3495EDDB#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 LT3495EDDB#TRPBF part is unused and in its original packaging.
Return procedure for LT3495EDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3495EDDB#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
