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Analog Devices Inc. LTC3525ESC6-5#TRMPBF
- Part No.:
- LTC3525ESC6-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LTC3525ESC6-5#TRMPBF.pdf
- Description:
- IC REG BOOST 5V 175MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,234
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Product details
Overview
LTC3525ESC6-5#TRMPBF from Analog Devices (formerly Linear Technology) is a fixed-output 5V synchronous step-up DC/DC converter with output disconnect, designed for single- or dual-cell alkaline/NiMH and Li-Ion battery-powered systems. It starts up from as low as 0.85V input, delivers up to 175mA at 5V from 3V input, achieves up to 95% efficiency, and features ultralow 8µA typical quiescent current for extended battery life in portable instrumentation.
For engineers reviewing the LTC3525ESC6-5#TRMPBF datasheet, LTC3525ESC6-5#TRMPBF pinout, LTC3525ESC6-5#TRMPBF application, or LTC3525ESC6-5#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed load capability (175mA @ 5V from 3V), true output disconnect behavior, and real-world alternative selection guidance - all specific to the LTC3525ESC6-5#TRMPBF variant.
Technical Context
The LTC3525ESC6-5#TRMPBF implements a Burst Mode® hysteretic control architecture with adaptive peak/valley inductor current regulation (150mA–500mA range), enabling high efficiency across light-to-moderate loads. Its internal 0.4Ω NMOS switch and 0.7Ω PMOS synchronous rectifier eliminate external diode losses while supporting VIN ≥ VOUT operation with output disconnect.
Startup uses a dedicated oscillator to bootstrap from 0.85V, transitioning to normal synchronous operation once VOUT exceeds VIN by 0.2V and either rail reaches 1.8V. Antiringing control on the SW pin minimizes EMI during zero-current switching, and thermal shutdown protects against sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±1.5% (4.85V–5.15V); enables direct replacement of 5V 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 voltage. |
| Quiescent Current | 8µA typical at VOUT; extends battery runtime in always-on sensor nodes and glucose meters. |
| Peak Switch Current | 400–500mA; supports 175mA output at 5V from 3V input with >90% efficiency (VIN=3V, IOUT=175mA). |
| Shutdown Current | <1µA; ensures zero-load battery drain during system sleep or power-off states. |
| Switch On-Resistance | NMOS: 0.4Ω, PMOS: 0.7Ω; reduces conduction loss and improves light-load efficiency vs. charge pumps. |
| Operating Junction Temp | –40°C to 125°C; qualified for industrial and automotive cabin applications with full spec compliance. |
Pinout & Package
Package: 6-Lead Plastic SC70 (SC6), 1.0mm max height, footprint compatible with JEDEC MO-203 AB and EIAJ SC-70 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Logic-Controlled Shutdown Input | Pulled below 0.4V disables converter and activates true output disconnect; pulled above 1V enables operation. |
| GND (Pins 2, 5) | Power Ground Reference | Dual ground pins reduce PCB trace inductance and improve thermal dissipation in compact layouts. |
| VIN (Pin 3) | Main Input Power 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 | Delivers fixed 5V; internal disconnect FET isolates output from input during shutdown (zero inrush). |
| SW (Pin 6) | Internal Switch Node | Connects to inductor; integrates antiringing resistor to damp LC oscillation at zero-current crossing. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Maintains 7–8µA quiescent current across load range, enabling >1-year battery life in 10µA average-load devices. |
| True Output Disconnect | Physically opens path between VIN and VOUT during shutdown, eliminating leakage paths and enabling safe hot-swap. |
| Adaptive Peak Current Limit | Automatically scales from 150mA (light load) to 500mA (heavy load), optimizing conduction loss vs. ripple tradeoff. |
| Antiringing Control | Integrated resistor across SW–VIN suppresses ringing at switch turn-off, reducing EMI without external snubber. |
| Low-Profile SC70 Package | 1.0mm max height enables use in ultra-thin wearables and hearing aids where Z-height is constrained. |
Applications
| Glucose Meters | Digital Cameras (Flash LED Driver) |
|---|---|
Use Scenario: Portable handheld medical device powered by single AAA alkaline cell requiring stable 5V rail for ADC, microcontroller, and LCD backlight. IC Role / Device Role / Timing Role: Primary 5V power source with cold-start capability and zero-shutdown drain. Use Value: Enables 0.85V startup and <1µA shutdown current, extending single-cell battery life to >2000 measurements per set. |
Use Scenario: Compact digital camera using Li-Ion battery (3.0–4.2V) to drive white LED flash requiring regulated 5V at 200mA peak. IC Role / Device Role / Timing Role: High-efficiency boost converter supplying flash LED driver IC with precise 5V input. Use Value: Delivers 175mA at 5V from 3V input with 95% efficiency, minimizing thermal rise and maximizing flash duration. |
| MP3 Players | Portable Instrumentation |
Use Scenario: Battery-powered audio player using dual NiMH cells (2.4V nominal) to power 5V DAC, headphone amplifier, and SD card interface. IC Role / Device Role / Timing Role: Fixed-output boost regulator providing clean, low-noise 5V supply independent of battery discharge curve. Use Value: Maintains regulation down to 0.85V input, allowing full utilization of battery capacity without brownout resets. |
Use Scenario: Handheld test equipment (e.g., multimeter, oscilloscope probe) powered by single alkaline cell needing isolated 5V for analog front-end and MCU. IC Role / Device Role / Timing Role: Micropower DC/DC converter with output disconnect to prevent backfeed into depleted battery during USB programming. Use Value: True output disconnect eliminates cross-conduction risk when external 5V USB power is applied alongside battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3528ESC6-5#TRMPBF | Higher 700mV start-up voltage; 1A peak switch current; DFN package (2×3mm) | Supports higher output current (up to 500mA), but requires larger board area and lacks SC70 compatibility | Select when >175mA continuous load or lower start-up voltage is not required; verify PCB layout change for DFN footprint |
| LTC3429ESC6-5#TRMPBF | Same SC70 package; 600mA peak switch; 500kHz fixed frequency; no Burst Mode | Delivers higher current but with higher 20µA quiescent current and audible switching noise at light loads | Select when predictable fixed-frequency operation is preferred over ultralow IQ; confirm EMI filtering requirements |
Compared with LTC3525ESC6-5#TRMPBF, LTC3528ESC6-5#TRMPBF trades SC70 size for higher current and lower start-up voltage, while LTC3429ESC6-5#TRMPBF retains SC70 compatibility but sacrifices micropower efficiency for fixed-frequency predictability - making LTC3525ESC6-5#TRMPBF optimal for space-constrained, battery-critical applications.
Availability
LTC3525ESC6-5#TRMPBF is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, digital cameras, and MP3 players requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LTC3525ESC6-5#TRMPBF 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, manufacturing, and documentation for legacy Linear parts including the LTC3525 family.
The LTC3525 series was designed specifically for ultra-low-power, space-constrained portable electronics requiring efficient step-up conversion from single- or dual-cell batteries - emphasizing micropower operation, minimal external components, and true output disconnect.
FAQ
What is the minimum input voltage required for LTC3525ESC6-5#TRMPBF to start up and regulate?
The LTC3525ESC6-5#TRMPBF starts up from an input voltage as low as 0.85V, enabling operation from nearly depleted single-cell alkaline or NiMH batteries. Regulation is maintained down to ~0.5V depending on load, though full 175mA output capability requires VIN ≥ 3V per the datasheet's typical performance curves.
Does LTC3525ESC6-5#TRMPBF support output voltages higher than the input voltage during normal operation?
Yes, LTC3525ESC6-5#TRMPBF supports VIN ≥ VOUT operation, but only with reduced efficiency and lower output current capability because the internal P-channel synchronous rectifier is disabled in that mode. The device remains functional but operates in non-synchronous mode with higher losses.
What is the purpose of the dual GND pins (Pins 2 and 5) on LTC3525ESC6-5#TRMPBF?
The dual GND pins on LTC3525ESC6-5#TRMPBF provide separate low-inductance return paths for power and control circuitry, improving noise immunity and thermal performance. Pin 2 serves as primary power ground, while Pin 5 acts as auxiliary ground for the internal reference and comparator circuits - both must be connected to the same low-impedance ground plane.
Can LTC3525ESC6-5#TRMPBF be used with ceramic output capacitors smaller than 10µF?
No - the datasheet specifies a minimum 10µF ceramic output capacitor for LTC3525ESC6-5#TRMPBF to ensure stability, adequate ripple suppression, and proper Burst Mode operation. Using less capacitance risks output voltage overshoot, instability, or failure to maintain regulation under load transients.
How does the output disconnect feature of LTC3525ESC6-5#TRMPBF behave during shutdown?
During shutdown (SHDN < 0.4V), LTC3525ESC6-5#TRMPBF actively disconnects VOUT from VIN using an internal MOSFET, preventing backfeed and eliminating inrush current. This results in true zero-load current draw from the input source and isolates downstream circuitry from battery leakage paths.
LTC3525ESC6-5#TRMPBF 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 175mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LTC3525ESC6-5#TRMPBF FAQ
1.How can I place an order for LTC3525ESC6-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3525ESC6-5#TRMPBF 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 LTC3525ESC6-5#TRMPBF reliable?
The price and inventory of LTC3525ESC6-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3525ESC6-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3525ESC6-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3525ESC6-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3525ESC6-5#TRMPBF?
LTC3525ESC6-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3525ESC6-5#TRMPBF 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 LTC3525ESC6-5#TRMPBF?
For technical support, including LTC3525ESC6-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3525ESC6-5#TRMPBF requirements.
6.How does Aetrix verify that LTC3525ESC6-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3525ESC6-5#TRMPBF 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 LTC3525ESC6-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3525ESC6-5#TRMPBF?
All LTC3525ESC6-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3525ESC6-5#TRMPBF, 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 LTC3525ESC6-5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3525ESC6-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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