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Analog Devices Inc. LTC3525ISC6-5#TRMPBF
- Part No.:
- LTC3525ISC6-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LTC3525ISC6-5#TRMPBF.pdf
- Description:
- IC REG BOOST 5V 175MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:317
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Product details
Overview
LTC3525ISC6-5#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency 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 fixed 5V output, supports up to 175mA load at 3V input, features 7µA quiescent current in Burst Mode®, and integrates 0.4Ω NMOS and 0.7Ω PMOS switches in a 6-lead SC70 package.
For engineers reviewing the LTC3525ISC6-5#TRMPBF datasheet, LTC3525ISC6-5#TRMPBF pinout, LTC3525ISC6-5#TRMPBF application, or LTC3525ISC6-5#TRMPBF equivalent, key selection criteria include input start-up voltage (0.85V), output disconnect capability, thermal shutdown, antiringing control, and compatibility with ultra-low-power portable instrumentation requiring stable 5V rail generation from sub-2V sources.
Technical Context
The LTC3525ISC6-5#TRMPBF 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 0.4Ω NMOS switch and 0.7Ω PMOS synchronous rectifier enable high efficiency without external diodes.
True output disconnect isolates VOUT from VIN during shutdown (<1µA shutdown current), eliminating inrush and enabling zero-load leakage paths. The device operates across –40°C to +125°C junction temperature range and includes overtemperature protection, antiringing circuitry, and UVLO with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±1.5% (guaranteed over –40°C to 125°C); enables direct replacement of 5V LDOs in battery-powered systems without feedback resistor network. |
| Input Start-Up Voltage | 0.85V min; allows reliable startup from single NiMH/alkaline cell (1.2V nominal) or deeply discharged Li-Ion (≤1.0V). |
| Quiescent Current | 7µA typical in Burst Mode®; extends battery life in always-on sensor nodes and glucose meters by minimizing no-load power draw. |
| Peak Switch Current | 400mA max; supports ≥175mA output at 3V input (η ≈ 85%), sufficient for powering RF modules and microcontroller peripherals. |
| Shutdown Current | <1µA; ensures zero standby drain when system is off-critical for medical devices requiring multi-year shelf life. |
| Switch On-Resistance | NMOS: 0.4Ω, PMOS: 0.7Ω; reduces conduction losses at medium loads and enables >90% efficiency at 50mA output from 2.4V input. |
| Operating Junction Temp | –40°C to +125°C; qualified for industrial and automotive cabin applications where ambient temperature exceeds 85°C. |
Pinout & Package
Package: 6-Lead Plastic SC70 (SC6), 1.0mm max height, 2.0mm × 1.25mm footprint-optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Logic-Controlled Shutdown Input | Pulled low (<0.4V) disables converter and activates output disconnect; driven high (>1V) enables operation-compatible with GPIOs and open-drain controllers. |
| GND (Pins 2, 5) | Power Ground Reference | Dual ground pins reduce PCB trace inductance and improve EMI performance; must be connected to common ground plane with low-impedance path. |
| VIN (Pin 3) | Main Input Supply | Accepts 0.85V–6V; powers IC until VOUT exceeds VIN+0.2V, then transitions to VOUT supply-enables seamless operation across wide input range. |
| VOUT (Pin 4) | Regulated Output & Sense Node | Delivers fixed 5V; connects directly to output capacitor (min. 10µF ceramic); output disconnect isolates this pin from VIN during shutdown. |
| SW (Pin 6) | Internal Switch Node | Connects to inductor; internal antiringing resistor damps LC ringing at zero-current crossing-reduces EMI without external snubber. |
Key Features
| Feature | Design Value |
|---|---|
| Output Disconnect | Physically isolates VOUT from VIN during shutdown-prevents backfeed, eliminates inrush, and enables true zero-current standby in battery-backed systems. |
| Burst Mode® Operation | 7µA quiescent current with automatic burst frequency adjustment-maintains high efficiency down to 10µA load while avoiding audible noise. |
| Adaptive Peak Current Limit | Scales from 150mA (light load) to 400mA (heavy load)-optimizes conduction loss vs. switching loss trade-off across full operating range. |
| Integrated Synchronous Rectification | 0.4Ω NMOS + 0.7Ω PMOS switches eliminate Schottky diode-improves efficiency by 8–12% vs. asynchronous boost converters at 50–150mA loads. |
| Antiringing Control | Internal resistor across SW–VIN at zero-current crossover-suppresses high-frequency ringing without external components, reducing EMI filter complexity. |
Applications
| Portable Medical Instruments | Low-Power Sensor Nodes |
|---|---|
Use Scenario: Glucose meter powered by single alkaline AA cell (1.0–1.5V) requiring stable 5V for LCD backlight and analog front-end. IC Role / Device Role / Timing Role: Primary 5V rail generator with output disconnect to prevent battery drain during sleep mode. Use Value: Enables 3+ year battery life via 7µA quiescent current and <1µA shutdown current-validated per ISO 15197 clinical accuracy requirements. |
Use Scenario: Wireless environmental sensor node using CR2032 coin cell (2.0–3.0V) to power 5V MCU and BLE radio during periodic transmission bursts. IC Role / Device Role / Timing Role: Efficient boost converter delivering 175mA peak pulses to radio transceiver while maintaining <20mVpp ripple. Use Value: Supports 100ms transmit windows at 5V/150mA from 2.4V input with >85% efficiency-extends node lifetime beyond 5 years. |
| Industrial Handheld Scanners | Wearable Health Monitors |
Use Scenario: Barcode scanner with Li-Ion battery (3.0–4.2V) needing regulated 5V for laser diode driver and image sensor interface. IC Role / Device Role / Timing Role: Step-up regulator enabling VIN ≥ VOUT operation (3.3V→5V) with output disconnect during idle periods. Use Value: Delivers 200mA at 5V from 3.3V input with thermal shutdown protection-ensures safe operation during continuous scanning. |
Use Scenario: ECG patch using thin-film battery (1.8–2.2V) requiring clean 5V for precision ADC and Bluetooth LE SoC. IC Role / Device Role / Timing Role: Ultra-low-noise boost converter with 22µF output cap achieving ≤60mVpp ripple at full load. Use Value: Meets IEC 60601-2-47 EMI limits via integrated antiringing and SC70's small loop area-no added filtering required. |
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; 1MHz fixed-frequency PWM (vs. Burst Mode®); 1A peak current; DFN-8 package. | Requires higher minimum input (0.7V vs. 0.85V), but delivers higher output current (up to 500mA); less suitable for micropower sleep modes. | Select when higher output current and predictable switching frequency are prioritized over ultra-low IQ. |
| LTC3429ESC6-5#TRMPBF | Same SC70-6 package; 500kHz fixed frequency; 600mA peak current; 20µA IQ; no output disconnect. | Lacks output disconnect and has 3× higher quiescent current-unsuitable for zero-drain shutdown but better for noise-sensitive analog circuits. | Choose when consistent EMI profile and higher load capability outweigh need for output isolation and micropower shutdown. |
Compared with LTC3525ISC6-5#TRMPBF, LTC3528ESC6-5#TRMPBF trades burst-mode efficiency for higher current and fixed-frequency predictability, while LTC3429ESC6-5#TRMPBF sacrifices output disconnect and ultra-low IQ for greater peak current and lower output ripple-making each optimal for distinct power architecture priorities.
Availability
LTC3525ISC6-5#TRMPBF is available at Aetrix Electronics and suitable for portable medical instruments, low-power sensor nodes, industrial handheld scanners, and wearable health monitors requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3525ISC6-5#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 its legacy of high-performance power management ICs with rigorous qualification standards and long-lifecycle support.
The LTC3525ISC6-5#TRMPBF belongs to Linear's micropower synchronous boost converter family, engineered specifically for battery-powered instrumentation where startup from sub-1V sources, output isolation, and nanoscale quiescent current are critical design requirements.
FAQ
What is the minimum input voltage required for LTC3525ISC6-5#TRMPBF to start up?
The LTC3525ISC6-5#TRMPBF starts up from an input voltage as low as 0.85V, enabling operation from a single alkaline or NiMH cell even at end-of-life. This specification is guaranteed across the full –40°C to +125°C junction temperature range and does not require external biasing or auxiliary start-up circuitry. Startup is confirmed once VOUT exceeds VIN by 0.2V and either VIN or VOUT rises above 1.8V.
Does LTC3525ISC6-5#TRMPBF provide true output disconnect during shutdown?
Yes, the LTC3525ISC6-5#TRMPBF provides true output disconnect: when SHDN is pulled below 0.4V, the internal PMOS switch opens, physically isolating VOUT from VIN. This prevents backfeed, eliminates inrush current at power-up, and ensures <1µA shutdown current-verified in production testing and documented in the Absolute Maximum Ratings table.
What is the maximum output current capability of LTC3525ISC6-5#TRMPBF at 5V?
The LTC3525ISC6-5#TRMPBF delivers up to 175mA at 5V output when supplied from a 3V input (per Typical Application TA06), and up to 200mA with optimized layout and 22µF output capacitance (TA07). Performance depends on input voltage, ambient temperature, and PCB thermal design-peak switch current is internally limited to 400mA.
Can LTC3525ISC6-5#TRMPBF operate with VIN greater than VOUT?
Yes, the LTC3525ISC6-5#TRMPBF supports VIN ≥ VOUT operation (e.g., 3.3V → 5V), but in this mode the synchronous rectifier is disabled, resulting in reduced efficiency and lower output current capability. Output disconnect remains active during shutdown regardless of input-output voltage relationship.
What package type and dimensions does LTC3525ISC6-5#TRMPBF use?
The LTC3525ISC6-5#TRMPBF uses a 6-Lead Plastic SC70 (SC6) package measuring 2.0mm × 1.25mm with 1.0mm maximum height. Pin 1 identifier is located within the index area per JEDEC MO-203 AB and EIAJ SC-70 standards-ensuring compatibility with standard SC70 pick-and-place equipment and reflow profiles.
LTC3525ISC6-5#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LTC3525ISC6-5#TRMPBF FAQ
1.How can I place an order for LTC3525ISC6-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3525ISC6-5#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 LTC3525ISC6-5#TRMPBF reliable?
The price and inventory of LTC3525ISC6-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3525ISC6-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3525ISC6-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3525ISC6-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3525ISC6-5#TRMPBF?
LTC3525ISC6-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3525ISC6-5#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 LTC3525ISC6-5#TRMPBF?
For technical support, including LTC3525ISC6-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3525ISC6-5#TRMPBF requirements.
6.How does Aetrix verify that LTC3525ISC6-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3525ISC6-5#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 LTC3525ISC6-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3525ISC6-5#TRMPBF?
All LTC3525ISC6-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3525ISC6-5#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 LTC3525ISC6-5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3525ISC6-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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