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Analog Devices Inc. LTC3525ISC6-3#TRPBF
- Part No.:
- LTC3525ISC6-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LTC3525ISC6-3#TRPBF.pdf
- Description:
- IC REG BOOST 3V 65MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,235
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Product details
Overview
LTC3525ISC6-3#TRPBF from Analog Devices (formerly Linear Technology) is a micropower synchronous step-up DC/DC converter with output disconnect, designed for single-cell alkaline/NiMH or Li-Ion battery-powered systems. It starts up from as low as 0.85V input, delivers fixed 3V output, supports up to 150mA load at 3V from 1.8V input, and features 7µA quiescent current, 0.5Ω NMOS switch, and 0.8Ω PMOS synchronous rectifier.
For engineers reviewing the LTC3525ISC6-3#TRPBF datasheet, LTC3525ISC6-3#TRPBF pinout, LTC3525ISC6-3#TRPBF application, or LTC3525ISC6-3#TRPBF equivalent, key selection criteria include ultralow IQ for battery life, output disconnect for zero shutdown leakage, SC70-6 thermal performance (θJA = 150°C/W), and Burst Mode® operation enabling high efficiency down to µA-level loads.
Technical Context
The LTC3525ISC6-3#TRPBF employs a hysteretic burst-mode control architecture with adaptive peak/valley inductor current regulation-reducing peak current to 150mA at light loads and scaling up to 400mA under heavy load. Its internal 0.5Ω NMOS switch and 0.8Ω PMOS rectifier enable synchronous operation without external diodes.
Startup uses a dedicated oscillator to bootstrap from 0.85V input; once VOUT exceeds VIN by ≥0.2V and either voltage surpasses 1.8V, it transitions to normal synchronous mode. Output disconnect is implemented via PMOS gate control during shutdown, isolating VOUT from VIN and limiting shutdown current to <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.00V ±3% (2.91V–3.09V); enables direct replacement of 3V LDOs without feedback resistor network. |
| Input Start-Up Voltage | 0.85V min; allows reliable startup from single NiMH/alkaline cell even at end-of-life. |
| Quiescent Current | 7µA typical (VIN), 7µA typical (VOUT); sustains >1-year battery life in always-on 10µA-load applications. |
| Peak Switch Current | 400mA max; supports 150mA output at 3V from 1.8V input with >85% efficiency. |
| Shutdown Current | <1µA; eliminates battery drain during system sleep, critical for portable medical devices. |
| Switch On-Resistance | NMOS: 0.6Ω, PMOS: 0.9Ω; minimizes conduction loss at light-to-moderate loads. |
| Operating Temp Range | –40°C to +125°C junction; qualified for industrial and automotive under-hood environments. |
Pinout & Package
Package: 6-Lead Plastic SC70 (SC6), 1.00mm max height, 1.80–2.20mm × 1.15–1.35mm footprint, θJA = 150°C/W on PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Logic-Controlled Shutdown Input | Pulled <0.4V to disable; pulls VOUT to GND via internal disconnect FET; must stay below (VIN + 0.4V) to avoid test mode activation. |
| GND (Pins 2, 5) | Power Ground Reference | Dual GND pins reduce ground impedance and improve thermal dissipation in compact layouts. |
| VIN (Pin 3) | Main Input Power Supply | Accepts 0.85V–6V; powers IC until VOUT > VIN + 0.2V, then switches to VOUT supply path. |
| VOUT (Pin 4) | Regulated Output & Sense Node | Connects to 10–22µF ceramic output capacitor; internal disconnect FET isolates VOUT from VIN in shutdown. |
| SW (Pin 6) | Switch Node | Drives external inductor; integrated antiringing resistor across SW–VIN suppresses EMI at zero-current crossing. |
Key Features
| Feature | Design Value |
|---|---|
| Output Disconnect | True hardware isolation between VOUT and VIN during shutdown, eliminating inrush and enabling zero-load battery drain. |
| Burst Mode® Operation | 7µA IQ maintained across full load range; enables >90% efficiency at 100µA load while avoiding audible switching noise. |
| Adaptive Peak Current Limit | Automatically scales from 150mA (light load) to 400mA (heavy load), optimizing conduction loss vs. ripple trade-off. |
| Antiringing Control | Integrated resistor across SW–VIN damps LC ringing at switch turn-off, reducing EMI without external snubber components. |
| Thermal Shutdown | Protects against sustained overload; activates above 125°C junction temperature and auto-recovers after cooldown. |
Applications
| Glucose Meters | Portable Instrumentation |
|---|---|
Use Scenario: Battery-powered handheld glucose meter requiring stable 3V rail from single AA/AAA cell over full discharge curve (1.5V → 0.9V). IC Role / Device Role / Timing Role: Primary 3V power rail generator with output disconnect to prevent sensor bias leakage during measurement idle states. Use Value: Enables >2-year battery life via 7µA quiescent current and extends usable runtime by starting at 0.85V input. | Use Scenario: Handheld multimeter or data logger operating from two alkaline cells (2.0V–3.2V input) powering 3V microcontroller and analog front-end. IC Role / Device Role / Timing Role: High-efficiency boost converter supplying regulated 3V to precision ADC reference and MCU core, with zero-shutdown drain. Use Value: Delivers 140mA at 3.3V from 1.8V input (per LTC3525-3.3 variant specs), confirming robustness for 3V variant at comparable loads. |
| MP3 Players | Digital Cameras |
Use Scenario: Flash memory audio player using single Li-Ion cell (3.0V–4.2V) but requiring 3V logic supply for DSP and codec. IC Role / Device Role / Timing Role: Synchronous boost converter enabling VIN ≥ VOUT operation (e.g., 3.3V input → 3V output) with output disconnect during standby. Use Value: Maintains regulation even when VIN ≈ VOUT, avoiding linear regulator inefficiency while supporting zero-current shutdown. | Use Scenario: Compact digital camera with CMOS image sensor and LCD requiring clean 3V supply from single alkaline cell (1.0V–1.6V input). IC Role / Device Role / Timing Role: Micropower boost converter powering sensor bias and display driver, with antiringing control minimizing EMI near sensitive analog circuits. Use Value: 20mVpp output ripple (light load) and 60mVpp (full load) meets low-noise imaging requirements without added filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3429ESC6-3#TRMPBF | Same SC70-6 package, 600mA peak switch current, 20µA IQ, 1V–4.5V input range. | Higher output current capability (up to 200mA at 3V), but higher quiescent current reduces battery life in µA-load applications. | Select when >150mA continuous load or wider input range (1V min) is required; not drop-in due to different FB/EN pin behavior. |
| LTC3528EDDB-3#TRMPBF | 2mm × 3mm DFN-8 package, 1A peak switch, 12µA IQ, 0.7V start-up, 5.25V max VOUT. | Higher power density and lower start-up voltage, but larger footprint and no pin compatibility with SC70-6 layout. | Choose for higher current or ultra-low-voltage startup needs; requires PCB redesign and thermal analysis for DFN package. |
Compared with LTC3429ESC6-3#TRMPBF and LTC3528EDDB-3#TRMPBF, the LTC3525ISC6-3#TRPBF offers the lowest quiescent current (7µA) and smallest footprint (SC70-6) for sub-150mA 3V applications, making it optimal for space-constrained, long-life battery devices where efficiency at microamp loads is critical.
Availability
LTC3525ISC6-3#TRPBF is available at Aetrix Electronics and suitable for glucose meters, portable instrumentation, MP3 players, and digital cameras requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3525ISC6-3#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; Linear pioneered high-performance analog ICs including precision DC/DC converters, references, and signal conditioning products.
The LTC3525 family was designed specifically for micropower, single-cell battery-powered applications demanding ultralow IQ, output disconnect, and minimal external components-targeting portable medical, instrumentation, and consumer electronics.
FAQ
What is the minimum input voltage required for the LTC3525ISC6-3#TRPBF to start up and regulate?
The LTC3525ISC6-3#TRPBF starts up from an input voltage as low as 0.85V, verified across the –40°C to +125°C junction temperature range. It achieves regulation once VOUT exceeds VIN by ≥0.2V and either VIN or VOUT rises above 1.8V. This enables reliable operation from deeply discharged single alkaline or NiMH cells.
Does the LTC3525ISC6-3#TRPBF provide true output disconnect during shutdown?
Yes, the LTC3525ISC6-3#TRPBF provides hardware-based output disconnect: when SHDN is pulled below 0.4V, an internal PMOS FET disconnects VOUT from VIN, reducing shutdown current to <1µA and preventing battery drain or inrush into downstream circuitry.
What is the maximum continuous output current the LTC3525ISC6-3#TRPBF can deliver at 3V output?
The LTC3525ISC6-3#TRPBF delivers up to 150mA continuously at 3V output when supplied from 1.8V input, based on its 400mA peak switch current limit and typical 85%+ efficiency. At lower inputs (e.g., 1.2V), max output drops to ~65mA per datasheet specifications.
How does Burst Mode® operation improve efficiency at light loads for the LTC3525ISC6-3#TRPBF?
Burst Mode® operation reduces the LTC3525ISC6-3#TRPBF's quiescent current to 7µA by disabling switching until output voltage droops ~9mV below regulation, then delivering a short burst of pulses. This eliminates switching losses at µA loads while maintaining tight regulation and avoiding audible noise due to low peak inductor current.
What package type and thermal characteristics apply to the LTC3525ISC6-3#TRPBF?
The LTC3525ISC6-3#TRPBF uses a 6-Lead Plastic SC70 (SC6) package, 1.00mm max height. Its thermal resistance is θJA = 150°C/W on a PCB with ground plane, enabling operation up to +125°C junction temperature-suitable for sealed industrial enclosures without forced airflow.
LTC3525ISC6-3#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 65mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LTC3525ISC6-3#TRPBF FAQ
1.How can I place an order for LTC3525ISC6-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3525ISC6-3#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 LTC3525ISC6-3#TRPBF reliable?
The price and inventory of LTC3525ISC6-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3525ISC6-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3525ISC6-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3525ISC6-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3525ISC6-3#TRPBF?
LTC3525ISC6-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3525ISC6-3#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 LTC3525ISC6-3#TRPBF?
For technical support, including LTC3525ISC6-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3525ISC6-3#TRPBF requirements.
6.How does Aetrix verify that LTC3525ISC6-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3525ISC6-3#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 LTC3525ISC6-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3525ISC6-3#TRPBF?
All LTC3525ISC6-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3525ISC6-3#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 LTC3525ISC6-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC3525ISC6-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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