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Analog Devices Inc. LTC3525ESC6-3#TRPBF
- Part No.:
- LTC3525ESC6-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LTC3525ESC6-3#TRPBF.pdf
- Description:
- IC REG BOOST 3V 65MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,860
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Product details
Overview
LTC3525ESC6-3#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 delivers up to 65mA at 3V from a 1V input, features 7µA quiescent current, 0.85V minimum start-up voltage, and operates in Burst Mode® for ultra-low power efficiency.
For engineers reviewing the LTC3525ESC6-3#TRPBF datasheet, LTC3525ESC6-3#TRPBF pinout, LTC3525ESC6-3#TRPBF application, or LTC3525ESC6-3#TRPBF equivalent, key selection criteria include input start-up capability below 1V, fixed 3V output with true output disconnect, SC70-6 package constraints, and light-load efficiency optimization via adaptive peak current control.
Technical Context
The LTC3525ESC6-3#TRPBF integrates a 0.5Ω N-channel MOSFET switch and 0.8Ω P-channel synchronous rectifier, enabling high-efficiency boost conversion without an external Schottky diode. Its proprietary start-up oscillator allows operation from as low as 0.85V input, and internal antiringing control minimizes EMI at the SW node.
Burst Mode® operation maintains regulation at ultralight loads by delivering discrete current pulses; switching resumes when VOUT drops ~9mV below nominal. Output disconnect isolates VOUT from VIN during shutdown, limiting shutdown current to <1µA and eliminating inrush.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.00V ±3% - ensures stable rail for 3V logic, sensors, or RF modules without external feedback. |
| Input Start-Up Voltage | 0.85V min - enables reliable startup from partially discharged single alkaline or NiMH cells. |
| Quiescent Current | 7µA typical - maximizes battery runtime in always-on portable instruments and glucose meters. |
| Peak Switch Current | 400mA max - supports up to 65mA output at 3V from 1V input while maintaining >85% efficiency. |
| Shutdown Current | <1µA - eliminates standby drain, critical for long-life battery applications like remote sensors. |
| Package | 6-Lead SC70 (1.8 × 1.2 × 1.0mm) - enables ultra-compact designs where board space is constrained. |
| Operating Junction Temp | –40°C to 85°C - validated for consumer and industrial portable equipment environments. |
Pinout & Package
The LTC3525ESC6-3#TRPBF is housed in a 6-Lead Plastic SC70 package (JEDEC MO-203 AB, EIAJ SC-70), measuring 1.8mm × 1.2mm × 1.0mm with 0.65mm pitch. Pin 1 is marked with a dot; the package includes two GND pins (2 and 5) for improved thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Logic-Controlled Shutdown Input | Pulled above 1V to enable; pulled below 0.4V to disable with true output disconnect and <1µA shutdown current. |
| GND (Pins 2, 5) | Power Ground Reference | Dual ground connections reduce noise coupling and improve thermal dissipation in high-efficiency boost operation. |
| VIN (Pin 3) | Main Input Supply | Accepts 0.85V–6V; powers IC until VOUT exceeds VIN + 0.2V, then switches to VOUT supply path. |
| VOUT (Pin 4) | Regulated Output & Sense Node | Provides fixed 3V output; internal disconnect FET isolates load from input during shutdown. |
| SW (Pin 6) | Switch Node | Connects to inductor; internal antiringing resistor damps oscillation when inductor current reaches zero. |
Key Features
| Feature | Design Value |
|---|---|
| Output Disconnect | True hardware disconnect prevents backfeed and inrush current, enabling zero-current shutdown in battery-critical systems. |
| Burst Mode® Operation | 7µA quiescent current at no load preserves battery life in intermittent-use devices like digital thermometers. |
| Adaptive Peak Current Control | Adjusts peak inductor current from 150mA (light load) to 400mA (full load), optimizing conduction loss vs. ripple trade-off. |
| Antiringing Control | Integrated damping resistor across SW–VIN suppresses high-frequency ringing, reducing EMI without external components. |
| Thermal Shutdown | Protects against sustained overload; activates above 125°C junction temperature to prevent permanent damage. |
Applications
| Portable Medical Sensors | Low-Power Audio Devices |
|---|---|
Use Scenario: Glucose meter operating from a single AA alkaline cell with intermittent 3V sensor biasing and display backlighting. IC Role / Device Role / Timing Role: Step-up converter providing regulated 3V rail during measurement bursts while maintaining sub-1µA shutdown between readings. Use Value: Enables >1-year battery life using standard alkaline cells due to 7µA quiescent current and 0.85V start-up capability. | Use Scenario: MP3 player headphone amplifier requiring clean 3V supply from a single NiMH cell with variable load current. IC Role / Device Role / Timing Role: Synchronous boost regulator delivering stable 3V output with minimal ripple (<60mVpp at full load) and fast transient response. Use Value: Eliminates need for external Schottky diode and reduces solution size by 40% versus charge-pump alternatives. |
| Industrial Remote Sensors | Wearable Health Monitors |
Use Scenario: Wireless temperature sensor node powered by coin cell, transmitting data every 5 minutes with brief 3V MCU and radio activation. IC Role / Device Role / Timing Role: Micropower DC/DC converter supplying regulated 3V only during active transmission, then entering ultra-low-power sleep. Use Value: Achieves 3+ years of operation on CR2032 via <1µA shutdown current and efficient light-load Burst Mode® operation. | Use Scenario: Optical heart-rate monitor using green LEDs and analog front-end, powered by thin-film lithium battery. IC Role / Device Role / Timing Role: Fixed-output boost converter powering LED driver and signal chain with precise 3V rail and minimal voltage droop. Use Value: Maintains consistent LED intensity and ADC reference stability across battery discharge curve (0.85V–1.6V input). |
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 | Fixed 3.3V output; 20µA IQ; supports dual-cell input up to 4.5V; same SC70-6 package. | Requires 3.3V rail instead of 3V; higher IQ reduces battery life in ultra-low-power use cases. | Select when system requires 3.3V logic compatibility and input voltage may exceed 3V. |
| LTC3528EDD#TRMPBF | Adjustable output (0.7V–5.25V); 12µA IQ; 1A output capability; 2mm × 3mm DFN package. | Requires external feedback resistors; larger footprint; higher output current capability unnecessary for 65mA applications. | Select when design needs programmable output voltage or higher current headroom, accepting larger PCB area. |
Compared with LTC3525ESC6-3#TRPBF, LTC3429ESC6#TRMPBF offers higher input voltage range but lacks 3V output and has 3× higher quiescent current, while LTC3528EDD#TRMPBF provides flexibility and headroom at the cost of size and complexity-making LTC3525ESC6-3#TRPBF optimal for space-constrained, single-cell 3V systems prioritizing battery longevity.
Availability
LTC3525ESC6-3#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, low-power audio devices, industrial remote sensors, and wearable health monitors requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3525ESC6-3#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 continues its legacy of high-performance analog and power management ICs, emphasizing precision, efficiency, and reliability in battery-powered and industrial applications.
The LTC3525ESC6-3#TRPBF belongs to Linear's micropower DC/DC converter product line, engineered specifically for ultra-low-voltage start-up and extended battery life in single-cell portable electronics.
FAQ
What is the minimum input voltage required for the LTC3525ESC6-3#TRPBF to start up?
The LTC3525ESC6-3#TRPBF starts up with an input voltage as low as 0.85V, enabling operation from nearly depleted single alkaline or NiMH cells. This is achieved via an internal start-up oscillator that remains active until VOUT exceeds VIN by at least 0.2V and either VIN or VOUT rises above 1.8V.
Does the LTC3525ESC6-3#TRPBF provide true output disconnect during shutdown?
Yes, the LTC3525ESC6-3#TRPBF includes hardware-based output disconnect: when SHDN is pulled below 0.4V, an internal FET disconnects VOUT from VIN, preventing backfeed and limiting shutdown current to <1µA. This feature is confirmed in the Absolute Maximum Ratings table and Pin Functions section of the datasheet.
What is the typical efficiency of the LTC3525ESC6-3#TRPBF at 10mA load with 1.2V input?
At 10mA load and 1.2V input, the LTC3525ESC6-3#TRPBF achieves approximately 85% efficiency, as shown in Figure 3525 G04 (LTC3525-3 Efficiency and Power Loss vs Load). This efficiency level is sustained across light-to-moderate loads due to Burst Mode® operation and low RDS(ON) switches.
Can the LTC3525ESC6-3#TRPBF operate with input voltage higher than its 3V output?
Yes, the LTC3525ESC6-3#TRPBF can operate with VIN ≥ VOUT (e.g., 3.3V input to 3V output), but in this mode the synchronous rectifier is disabled, reducing efficiency and output current capability. The device maintains regulation, but performance reverts to quasi-linear behavior with higher losses.
What external components are required for basic operation of the LTC3525ESC6-3#TRPBF?
The LTC3525ESC6-3#TRPBF requires only three external components: a 10µH inductor (e.g., Murata LQH32CN100K53), a 10µF ceramic output capacitor (X5R/X7R), and a 1µF ceramic input bypass capacitor. No feedback resistors or compensation networks are needed due to its fixed 3V output architecture.
LTC3525ESC6-3#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LTC3525ESC6-3#TRPBF FAQ
1.How can I place an order for LTC3525ESC6-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3525ESC6-3#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 LTC3525ESC6-3#TRPBF reliable?
The price and inventory of LTC3525ESC6-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3525ESC6-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3525ESC6-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3525ESC6-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3525ESC6-3#TRPBF?
LTC3525ESC6-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3525ESC6-3#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 LTC3525ESC6-3#TRPBF?
For technical support, including LTC3525ESC6-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3525ESC6-3#TRPBF requirements.
6.How does Aetrix verify that LTC3525ESC6-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3525ESC6-3#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 LTC3525ESC6-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3525ESC6-3#TRPBF?
All LTC3525ESC6-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3525ESC6-3#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 LTC3525ESC6-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC3525ESC6-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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