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Analog Devices Inc. LTC3525LESC6-3#TRPBF
- Part No.:
- LTC3525LESC6-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LTC3525LESC6-3#TRPBF.pdf
- Description:
- IC REG BOOST 3V 160MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,572
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Product details
Overview
LTC3525LESC6-3#TRPBF from Analog Devices (formerly Linear Technology) is a micropower synchronous step-up DC/DC converter with output disconnect, designed for ultra-low-voltage startup (0.7V typical) in single-cell alkaline/NiMH systems. It delivers a fixed 3V output at up to 160mA from 1.8V input, features 400mA peak switch current, 7µA quiescent current in Burst Mode®, and operates in a 6-pin SC70 package.
For engineers reviewing the LTC3525LESC6-3#TRPBF datasheet, LTC3525LESC6-3#TRPBF pinout, LTC3525LESC6-3#TRPBF application, or LTC3525LESC6-3#TRPBF equivalent, key selection criteria include minimum startup voltage (0.88V guaranteed), output disconnect capability, <1µA shutdown current, thermal/short-circuit protection, and compatibility with ceramic output capacitors ≥10µF.
Technical Context
The LTC3525LESC6-3#TRPBF uses a proprietary Burst Mode® control architecture that enables ultralow quiescent current (7µA) while maintaining regulation across load currents from 5mA to 160mA. Its dual-MOSFET synchronous rectification-comprising a 0.5Ω N-channel switch and 0.85Ω P-channel rectifier-eliminates external diode losses and enables true output disconnect during shutdown.
Startup is managed by an internal oscillator that operates down to 0.7V input, transitioning to normal PWM operation only after VOUT exceeds VIN by ≥0.2V and either rail reaches ≥1.8V. Anti-ringing control actively damps SW node oscillation at zero-current crossing, reducing EMI without external snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.00V ±3% (2.91V–3.09V), internally trimmed, no feedback resistor required |
| Input Voltage Range | 0.5V to 4.5V - supports single-cell alkaline (0.8V–1.6V), NiMH (0.9V–1.4V), or Li-ion (2.7V–4.2V) sources |
| Startup Voltage | 0.7V typical / 0.88V guaranteed - enables operation from nearly-dead batteries |
| Peak Switch Current | 400mA min - sustains 160mA output at 1.8V input with >90% efficiency |
| Quiescent Current | 7µA typical in Burst Mode® - extends battery life in always-on portable devices |
| Shutdown Current | <1µA - ensures zero-load leakage when disabled, critical for long-term storage |
| Efficiency | Up to 95% at mid-load - achieved via synchronous rectification and low-RDS(on) MOSFETs |
| Package | 6-pin SC70 (2.0mm × 1.25mm × 0.9mm) - footprint-compatible with SOT-23 but 40% smaller |
Pinout & Package
The LTC3525LESC6-3#TRPBF is housed in a 6-pin plastic SC70 package (JEDEC MO-203 AB, EIAJ SC-70), with exposed pad not connected internally. Package dimensions: 2.0–2.2mm length, 1.15–1.35mm width, 0.9mm max height. Pin 1 marked by index area; pin 1 is SHDN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Logic-controlled enable/disable input | Pulled high (>0.88V) to activate; pulled low (<0.3V) to enter sub-1µA shutdown; avoid 0.5V–1.0V above VIN to prevent test mode activation |
| GND (Pins 2, 5) | Power and signal ground reference | Dual GND pins reduce ground impedance and improve thermal dissipation; both must be connected to PCB ground plane |
| VIN (Pin 3) | Main power input | Supplies IC until VOUT > VIN + 0.2V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin |
| VOUT (Pin 4) | Regulated output and sense node | Delivers fixed 3V; connects to ≥10µF ceramic output capacitor; enables true output disconnect when SHDN = low |
| SW (Pin 6) | Switch node for external inductor | Drives internal N-MOSFET; connects to inductor (4.7–15µH); integrated anti-ringing circuit minimizes EMI at zero-current crossing |
Key Features
| Feature | Design Value |
|---|---|
| Output Disconnect | Physically isolates VOUT from VIN during shutdown - eliminates inrush current and enables zero-load battery drain |
| Burst Mode® Operation | Maintains regulation at light loads with 7µA IQ - avoids linear regulator inefficiency while preserving fast transient response |
| Anti-Ringing Control | Internal resistor across SW–VIN at zero-current crossing - reduces EMI without external snubber components or layout compromises |
| Start-Up Oscillator | Enables reliable startup from 0.7V input - supports single-cell alkaline applications down to end-of-life voltage |
| Thermal & Short-Circuit Protection | Auto-recovering shutdown at TJ > 125°C and foldback current limiting - prevents damage during overload or shorted output |
| Power-Adjust Architecture | Automatically scales peak inductor current from 150mA (light load) to 400mA (full load) - optimizes conduction loss vs. switching loss trade-off |
Applications
| Glucose Meters | MP3 Players |
|---|---|
Use Scenario: Portable handheld medical device powered by single AAA alkaline cell with variable load (LCD backlight, sensor bias, RF transmission). IC Role / Device Role / Timing Role: Primary 3V power rail generator enabling analog front-end, microcontroller, and display operation from 0.9V–1.5V battery range. Use Value: 0.7V startup ensures full functionality even as battery depletes; output disconnect prevents backfeed into exhausted cells during storage. | Use Scenario: Compact audio player using single-cell NiMH battery, requiring stable 3V supply for DAC, flash memory, and OLED display. IC Role / Device Role / Timing Role: Synchronous boost converter delivering regulated 3V with minimal ripple (<60mVPP) under dynamic load steps (e.g., headphone insertion, file access). Use Value: 95% peak efficiency and 7µA quiescent current extend playback time; SC70 footprint saves board space in tight form factors. |
| Digital Cameras | Portable Instruments |
Use Scenario: Low-cost digital camera with flash LED, CMOS image sensor, and SD card interface, powered by two alkaline AA cells. IC Role / Device Role / Timing Role: Fixed 3V supply for sensor bias and memory interface; handles pulsed 100mA loads during image capture and write cycles. Use Value: 160mA output capability at 1.8V input supports burst-mode imaging; anti-ringing control suppresses EMI that could corrupt image data lines. | Use Scenario: Handheld multimeter or environmental sensor using coin-cell or AAA battery, requiring precise 3V reference for ADC and low-noise analog circuits. IC Role / Device Role / Timing Role: Ultra-low-noise, low-ripple 3V source with <1µA shutdown - maintains calibration integrity during sleep between measurements. Use Value: 20mVPP ripple at light load minimizes ADC quantization error; thermal shutdown protects against probe short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3429ESC6#TRMPBF | Same SC70-6 package; 500kHz fixed-frequency vs. Burst Mode®; 600mA peak current; 3.3V/5V selectable output | Higher output current and fixed frequency simplify EMI filtering but increase light-load IQ (20µA vs. 7µA) | Select for higher-power or noise-sensitive applications where predictable switching frequency is preferred over lowest IQ |
| LTC3526EDC#TRMPBF | 2mm × 2mm DFN-8 package; 500mA peak current; 1MHz fixed frequency; adjustable output (0.6V–5.25V) | Requires external feedback resistors; higher IQ (9µA) but better transient response and higher efficiency above 50mA load | Select when adjustable output voltage or higher continuous output current (up to 250mA) is required, accepting larger footprint |
Compared with LTC3525LESC6-3#TRPBF, LTC3429ESC6#TRMPBF trades ultralow IQ for higher output capability and fixed-frequency operation, while LTC3526EDC#TRMPBF offers design flexibility with adjustable output and improved heavy-load efficiency at the cost of increased size and complexity.
Availability
LTC3525LESC6-3#TRPBF is available at Aetrix Electronics and suitable for glucose meters, portable audio players, digital cameras, and handheld test instruments requiring stable component supply, long battery life, and ultra-low-voltage startup capability.
Supply support for LTC3525LESC6-3#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 and maintains full product support, documentation, and manufacturing continuity for all Linear-branded power management ICs.
The LTC3525L family was designed specifically for micropower, single-cell battery-powered applications demanding high efficiency below 1V input - targeting medical, instrumentation, and consumer portable devices where battery runtime and small size are critical.
FAQ
What is the minimum input voltage required for LTC3525LESC6-3#TRPBF to start switching?
The LTC3525LESC6-3#TRPBF guarantees startup at 0.88V input (–40°C to 85°C), with typical performance starting at 0.7V. Startup requires both VOUT exceeding VIN by ≥0.2V and either VIN or VOUT reaching ≥1.8V. Below 0.5V input, regulation cannot be maintained regardless of load.
Does LTC3525LESC6-3#TRPBF require external compensation components?
No, the LTC3525LESC6-3#TRPBF uses a hysteretic (Burst Mode®) control architecture with internal compensation. Only three external components are needed: one inductor (4.7–15µH), one input capacitor (≥1µF), and one output capacitor (≥10µF). No loop compensation network is required.
Can LTC3525LESC6-3#TRPBF operate with VIN greater than VOUT?
Yes, the LTC3525LESC6-3#TRPBF supports VIN ≥ VOUT operation due to its output disconnect feature. However, in this mode the P-channel synchronous rectifier is disabled, resulting in lower efficiency and reduced maximum output current - it functions as a pass-through regulator rather than a boost converter.
What is the recommended output capacitor value for LTC3525LESC6-3#TRPBF to minimize ripple?
A 22µF X5R/X7R ceramic capacitor is recommended for LTC3525LESC6-3#TRPBF to achieve ≤20mVPP ripple at light load and ≤60mVPP at full load. Using >47µF increases peak inductor current unnecessarily at light loads, reducing efficiency without meaningful ripple improvement.
How does the LTC3525LESC6-3#TRPBF handle short-circuit conditions?
The LTC3525LESC6-3#TRPBF incorporates foldback current limiting: when VIN exceeds VOUT by >1.7V, peak inductor current is reduced to protect the P-channel rectifier. Combined with thermal shutdown (TJ > 125°C), this provides robust short-circuit protection without external circuitry.
LTC3525LESC6-3#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):
- 0.5V
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 160mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LTC3525LESC6-3#TRPBF FAQ
1.How can I place an order for LTC3525LESC6-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3525LESC6-3#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 LTC3525LESC6-3#TRPBF reliable?
The price and inventory of LTC3525LESC6-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3525LESC6-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3525LESC6-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3525LESC6-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3525LESC6-3#TRPBF?
LTC3525LESC6-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3525LESC6-3#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 LTC3525LESC6-3#TRPBF?
For technical support, including LTC3525LESC6-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3525LESC6-3#TRPBF requirements.
6.How does Aetrix verify that LTC3525LESC6-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3525LESC6-3#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 LTC3525LESC6-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3525LESC6-3#TRPBF?
All LTC3525LESC6-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3525LESC6-3#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 LTC3525LESC6-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC3525LESC6-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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