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Analog Devices Inc. LTC3526EDC-2#TRPBF
- Part No.:
- LTC3526EDC-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3526EDC-2#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,264
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Product details
Overview
LTC3526EDC-2#TRPBF from Analog Devices (formerly Linear Technology) is a synchronous, fixed-frequency 2MHz step-up DC/DC converter with output disconnect and Burst Mode® operation. It delivers up to 200mA at 3.3V from two alkaline/NiMH cells or 100mA at 3.3V from a single cell, features 850mV start-up voltage, 0.5V–5V input range, and operates in a compact 2mm × 2mm × 0.75mm DFN-6 package. It is used in noise-canceling headphones and Bluetooth headsets where ultra-low quiescent current and small solution size are critical.
For engineers reviewing the LTC3526EDC-2#TRPBF datasheet, LTC3526EDC-2#TRPBF pinout, LTC3526EDC-2#TRPBF application, or LTC3526EDC-2#TRPBF equivalent, this page provides verified technical context, confirmed pin functions, real-world efficiency data across input voltages, validated alternative parts for low-voltage boost applications, and supply-chain support details specific to OEM and portable electronics design.
Technical Context
The LTC3526EDC-2#TRPBF employs current-mode PWM control with internal slope compensation and fully integrated N-channel and P-channel MOSFETs-RDS(ON) of 0.4Ω (NMOS) and 0.6Ω (PMOS) at VOUT = 3.3V-enabling high efficiency (up to 94%) and fast transient response. Its adaptive soft-start ramps peak inductor current to 700mA over ~0.5ms, preventing inrush during startup into heavy loads.
Burst Mode® operation reduces quiescent current to 9µA under light loads while maintaining fixed 2MHz switching during active bursts; anti-ringing circuitry damps SW-pin oscillation in discontinuous conduction mode to suppress EMI. Output disconnect eliminates body-diode conduction, allowing true VOUT = 0V shutdown and reverse-current blocking when VOUT is externally pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2MHz (typical), enables use of ≤2.2µH inductors and ceramic capacitors for minimal footprint |
| Start-Up Input Voltage | 0.85V (min), allows reliable startup from single depleted alkaline/NiMH cells |
| Input Voltage Range | 0.5V to 5V (operational), supports deep discharge battery operation down to 0.5V after startup |
| Output Voltage Range | 1.6V to 5.25V (adjustable via FB resistor divider), covers common logic rails (1.8V, 3.3V, 5V) |
| Quiescent Current (Burst Mode) | 9µA (typical), extends battery life in always-on portable devices like wireless mice |
| Peak Switch Current Limit | 700mA (typical), sets maximum deliverable output power independent of input/output voltage |
| Efficiency | Up to 94% at mid-load, achieved via synchronous rectification and low RDS(ON) MOSFETs |
| Shutdown Current | <1µA, ensures negligible battery drain during system sleep states |
Pinout & Package
Package: 6-lead (2mm × 2mm × 0.75mm) plastic DFN with exposed thermal pad (Pin 7, GND). Requires soldering of exposed pad to PCB ground plane for thermal performance (θJA = 102°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Connects to inductor; internal N-MOSFET drain; anti-ringing switch engages to VIN when current falls to zero |
| GND (Pin 2) | Signal and power ground | Primary ground reference; must connect directly to input/output capacitor negatives and exposed pad |
| VIN (Pin 3) | Input supply | Accepts 0.5V–5V; minimum 1µF ceramic decoupling required; powers IC until VOUT > VIN + 0.24V |
| SHDN (Pin 4) | Logic-controlled shutdown | Active-high enable; internal 4MΩ pull-down; drives <1µA shutdown current when pulled low |
| FB (Pin 5) | Feedback input | Connects to resistor divider; regulates VOUT via 1.195V reference; supports 1.6V–5.25V output programming |
| VOUT (Pin 6) | Output voltage sense / sync rectifier drain | Sense point for regulation; internal P-MOSFET source; requires short, wide trace to ≥4.7µF output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Output Disconnect | True VOUT = 0V shutdown with no reverse current-enables safe hot-swap and battery isolation |
| Burst Mode® Operation | 9µA quiescent current at light load without sacrificing 2MHz regulation stability or output accuracy |
| Low-Voltage Start-Up | 0.85V minimum VIN start threshold with internal oscillator-supports single-cell AA/AAA operation from fresh to fully depleted |
| Integrated Soft-Start | 0.5ms controlled ramp of peak inductor current to 700mA-prevents overshoot and inrush into large capacitive loads |
| Anti-Ringing Control | Internal switch clamps SW node during DCM-reduces EMI without external snubbers or ferrite beads |
| Thermal Shutdown | Activates at 160°C junction temperature with 15°C hysteresis-protects against sustained overload or poor heatsinking |
Applications
| Noise-Canceling Headphones | Bluetooth Headsets |
|---|---|
Use Scenario: Powering analog audio codecs and MEMS microphones from a single 1.5V alkaline cell while maintaining ultra-low standby current. IC Role / Device Role / Timing Role: Step-up regulator providing stable 1.8V rail for audio signal chain; operates in Burst Mode® during silence intervals. Use Value: Extends battery life beyond 20 hours by reducing quiescent draw to 9µA during idle periods without audible switching noise. |
Use Scenario: Generating 3.3V for Bluetooth radio and DSP from two NiMH cells in compact earbud form factor. IC Role / Device Role / Timing Role: Synchronous boost converter delivering 200mA at 3.3V with output disconnect during call termination. Use Value: Enables true zero-power shutdown between calls and eliminates reverse current into depleted batteries. |
| Wireless Mice | Flash-Based MP3 Players |
Use Scenario: Supplying 3.3V to RF transceiver and MCU in ultra-thin optical mouse powered by one AAA cell. IC Role / Device Role / Timing Role: Low-profile boost regulator with 2mm × 2mm DFN package fitting tight mechanical constraints. Use Value: Achieves full functionality down to 0.5V input-extends usable battery life by 30% compared to 0.9V-start competitors. |
Use Scenario: Providing regulated 3.3V to NAND flash memory and audio DAC in portable music player with single-cell alkaline supply. IC Role / Device Role / Timing Role: High-efficiency step-up converter supporting bursty write/read loads with minimal thermal rise. Use Value: Delivers 94% peak efficiency at 100mA, reducing heat generation in sealed plastic enclosure and preserving battery runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | 0.3V start-up, 3.3MHz switching, no output disconnect, 1.2V–5.5V VOUT range | Superior for sub-0.5V energy harvesting; unsuitable where true VOUT = 0V shutdown is required | Select when lowest possible start voltage outweighs need for output isolation or low-noise Burst Mode® |
| MAX17062ETA+ | 1.8V start-up, 1.2MHz, integrated LDO post-regulator, no Burst Mode®, 1.25V–4.0V VOUT | Better for noise-sensitive analog circuits needing ripple-free output; lacks ultra-low-IQ for long standby | Prefer when post-regulation cleanliness trumps battery life in mixed-signal portable systems |
Compared with TPS61200DRCT and MAX17062ETA+, the LTC3526EDC-2#TRPBF uniquely combines 0.85V start-up, true output disconnect, and 9µA Burst Mode® quiescent current-making it optimal for single-cell consumer audio and human-interface devices requiring both longevity and safe shutdown behavior.
Availability
LTC3526EDC-2#TRPBF is available at Aetrix Electronics and suitable for medical instruments, noise-canceling headphones, and Bluetooth headsets requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3526EDC-2#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 and maintains its legacy of high-performance power management ICs for precision, portable, and space-constrained applications.
The LTC3526EDC-2#TRPBF belongs to Linear's ultra-low-voltage boost converter family, designed specifically for single- and dual-cell battery-powered portable electronics demanding extended runtime, minimal solution size, and robust light-load efficiency.
FAQ
What is the minimum input voltage required for the LTC3526EDC-2#TRPBF to start switching?
The LTC3526EDC-2#TRPBF has a guaranteed minimum start-up input voltage of 0.85V (typical 0.85V, max 1.0V per datasheet). It uses an independent startup oscillator to initiate operation from a single depleted alkaline or NiMH cell. Once started, it continues operating down to 0.5V input, provided the duty cycle limit (90% typical) and available energy permit.
Does the LTC3526EDC-2#TRPBF support adjustable output voltage, and how is it configured?
Yes, the LTC3526EDC-2#TRPBF supports adjustable output voltage from 1.6V to 5.25V using an external resistor divider on the FB pin. The feedback reference voltage is 1.195V (±30mV), and VOUT = 1.195V × (1 + R1/R2). This configuration enables precise setting of common rails such as 1.8V, 3.3V, or 5V without requiring different fixed-output variants.
How does Burst Mode® operation improve battery life in the LTC3526EDC-2#TRPBF?
Burst Mode® operation in the LTC3526EDC-2#TRPBF reduces quiescent current to just 9µA (typical) during light loads by cycling between brief 2MHz switching bursts and sleep mode. This minimizes both switching and bias losses-extending battery life significantly in intermittently active devices like wireless mice or Bluetooth headsets where average load current is well below 10mA.
What is the purpose of the exposed thermal pad (Pin 7) on the LTC3526EDC-2#TRPBF DFN package?
The exposed thermal pad (Pin 7) on the LTC3526EDC-2#TRPBF is electrically and thermally connected to GND. It must be soldered to the PCB ground plane to achieve the specified θJA of 102°C/W. Failure to do so results in significantly higher junction temperatures, potentially triggering thermal shutdown under moderate load and degrading long-term reliability.
Can the LTC3526EDC-2#TRPBF operate with input voltage higher than the output voltage?
Yes, the LTC3526EDC-2#TRPBF supports VIN > VOUT operation-maintaining regulation even when input exceeds programmed output. However, efficiency drops substantially in this mode due to increased conduction losses, and maximum output current capability is reduced. It is intended primarily for boost operation but retains functionality in pass-through-like scenarios.
LTC3526EDC-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.5V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 1.6V
- Voltage - Output (Max):
- 5.25V
- Current - Output:
- 500mA (Switch)
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC3526EDC-2#TRPBF FAQ
1.How can I place an order for LTC3526EDC-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3526EDC-2#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 LTC3526EDC-2#TRPBF reliable?
The price and inventory of LTC3526EDC-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3526EDC-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3526EDC-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3526EDC-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3526EDC-2#TRPBF?
LTC3526EDC-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3526EDC-2#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 LTC3526EDC-2#TRPBF?
For technical support, including LTC3526EDC-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3526EDC-2#TRPBF requirements.
6.How does Aetrix verify that LTC3526EDC-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3526EDC-2#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 LTC3526EDC-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3526EDC-2#TRPBF?
All LTC3526EDC-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3526EDC-2#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 LTC3526EDC-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3526EDC-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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