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Analog Devices Inc. LTC3410BESC6-1.5#TRPBF
- Part No.:
- LTC3410BESC6-1.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LTC3410BESC6-1.5#TRPBF.pdf
- Description:
- IC REG BUCK 1.5V 300MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,421
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Product details
Overview
LTC3410BESC6-1.5#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC regulator in SC70-6 package, delivering up to 300mA output at fixed 1.5V with 2.25MHz constant-frequency current-mode control. It operates from 2.5V to 5.5V input, achieves up to 96% efficiency, supports 100% duty cycle for low-dropout operation, and requires no external Schottky diode-ideal for single Li-Ion battery-powered portable instrumentation.
For engineers reviewing the LTC3410BESC6-1.5#TRPBF datasheet, LTC3410BESC6-1.5#TRPBF pinout, LTC3410BESC6-1.5#TRPBF application, or LTC3410BESC6-1.5#TRPBF equivalent, key selection criteria include fixed 1.5V output accuracy (±2%), 380mA minimum peak switch current, shutdown current <1µA, ceramic-capacitor compatibility, and thermal performance under dropout conditions at high ambient temperature.
Technical Context
The LTC3410BESC6-1.5#TRPBF implements a constant-frequency, current-mode synchronous buck architecture with internal P-channel main and N-channel synchronous MOSFETs. Its 2.25MHz switching frequency enables compact 2.2–4.7µH inductors and ceramic input/output capacitors, while slope compensation prevents subharmonic oscillation above 40% duty cycle.
It features pulse-skipping mode at light loads to maintain regulation with low output ripple, oscillator foldback to ~310kHz during short-circuit events, and overtemperature protection that disables both switches when junction temperature exceeds ~150°C. The VOUT pin (Pin 6) connects internally to a precision resistive divider referenced to 0.8V, enabling fixed-output operation without external feedback components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% at 100mA load - ensures stable core voltage for low-power microcontrollers and sensors. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-Ion (2.7–4.2V) and regulated 3.3V/5V rails. |
| Switching Frequency | 2.25MHz (typ), 1.8–2.7MHz (min–max) - enables use of sub-3mm surface-mount inductors and reduces EMI fundamental frequency. |
| Peak Switch Current | 380mA (min), 600mA (max) - defines maximum sustainable inductor current before cycle-by-cycle current limit activation. |
| Efficiency | Up to 96% at 250mA - minimizes power loss and thermal rise in space-constrained portable designs. |
| Shutdown Current | <1µA - preserves battery life during system sleep modes without requiring external load switches. |
| Thermal Resistance | θJA = 250°C/W (SC70 package) - requires careful PCB copper area planning for >200mA continuous operation at 70°C ambient. |
Pinout & Package
Package: SC70-6 (6-lead plastic SC70), 2.0 × 1.25 × 0.9 mm, moisture sensitivity level 1, lead-free (RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable control input | Logic-high (>1.5V) enables regulation; logic-low (<0.3V) forces shutdown with <1µA quiescent draw - must not be left floating. |
| GND (Pins 2, 5) | Power and signal ground reference | Dual ground pins reduce ground impedance and improve transient response; both must connect to low-impedance PCB ground plane. |
| SW (Pin 3) | Internal switch node | Connects to inductor; carries high di/dt square-wave current - requires short, wide trace and isolation from noise-sensitive nodes (e.g., VFB). |
| VIN (Pin 4) | Main input supply | Accepts 2.5–5.5V; requires local 2.2µF ceramic decoupling capacitor placed adjacent to pin to suppress switching transients. |
| VOUT (Pin 6) | Fixed-output feedback node | Internally connected to 1.5V divider output - no external resistor network needed; serves as remote sense point for output voltage stability. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, increasing efficiency by ~5–8% and reducing BOM count and board area. |
| 100% duty cycle operation | Enables dropout down to VIN ≈ VOUT + ILOAD×RDS(ON)_P, extending usable battery voltage range in Li-Ion systems. |
| Ceramic capacitor compatibility | Stable with low-ESR X5R/X7R ceramics - enables <10mVPP output ripple and eliminates tantalum reliability concerns. |
| Current-mode control | Provides inherent cycle-by-cycle current limiting and fast line/load transient response without external compensation. |
| Overtemperature protection | Thermal shutdown activates at ~150°C junction temperature, preventing permanent damage during sustained overload or poor heatsinking. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage in GSM/UMTS handsets operating from single Li-Ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Primary 1.5V synchronous buck regulator supplying processor I/O and memory interface rails. Use Value: 96% peak efficiency and 100% duty cycle extend talk time by >12% versus non-synchronous alternatives at end-of-discharge voltage. | Use Scenario: Supplying image sensor analog front-end and ISP core logic in compact digital cameras. IC Role / Device Role / Timing Role: Fixed 1.5V point-of-load regulator with low-noise pulse-skipping mode during preview mode. Use Value: 2.25MHz switching avoids interference with image sensor sampling clocks and enables ultra-compact 2.2µH inductor placement near sensor module. |
| Wireless Modems | Portable Instruments |
Use Scenario: Regulating 1.5V supply for RF transceiver LNA and mixer bias in 802.11n/Bluetooth combo modules. IC Role / Device Role / Timing Role: Low-EMI synchronous buck converter with minimized SW node radiation via optimized SC70 layout. Use Value: Ceramic-capacitor stability and tight ±2% output tolerance ensure consistent RF gain and noise figure across temperature (-40°C to 85°C). | Use Scenario: Providing precision 1.5V reference rail for 16-bit ADC and low-noise op-amps in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Low-ripple, low-drift DC/DC source with <1µA shutdown for battery-backed sleep states. Use Value: Output voltage drift <±0.4%/V line regulation and <±0.5% load regulation preserve measurement accuracy during varying battery voltage and sensor load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.5V output, 3MHz switching, 350mA IOUT, 1.8–6.5V input - higher fSW but wider VIN range and lower max IOUT rating. | Requires larger input capacitance due to higher fSW; less suitable for 2.5V start-up in deep-discharge Li-Ion. | Prefer for designs needing >3MHz switching or 6.5V input tolerance; verify thermal margin at 300mA in 1.5mm × 1.5mm DRY package. |
| MAX1724EZT+T | Fixed 1.5V output, 1.5MHz fOSC, 400mA IOUT, 2.0–5.5V input - lower switching frequency, higher peak current, no integrated synchronous FETs (external diode required). | Higher output ripple and lower efficiency (~92%) due to external Schottky; larger solution size. | Prefer where cost sensitivity outweighs efficiency and board area; avoid in noise-sensitive imaging or RF applications. |
Compared with TPS62231DRYR and MAX1724EZT+T, the LTC3410BESC6-1.5#TRPBF offers optimal balance of 2.25MHz operation, true 2.5V start-up, integrated synchronous FETs, and SC70 footprint - making it uniquely suited for space-constrained, battery-life-critical portable instruments requiring stable 1.5V at ≤300mA.
Availability
LTC3410BESC6-1.5#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, wireless modems, portable instruments, and DSL modem applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3410BESC6-1.5#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3410B product line delivers high-efficiency, high-frequency synchronous buck regulators in ultra-small packages for portable and battery-powered systems where size, efficiency, and low-noise operation are critical design constraints.
FAQ
What is the guaranteed output voltage accuracy of the LTC3410BESC6-1.5#TRPBF over temperature and load?
The LTC3410BESC6-1.5#TRPBF guarantees ±2% output voltage accuracy over the full –40°C to 85°C operating temperature range and for output currents from 50mA to 250mA. At 100mA load and 25°C, the typical output is 1.5V with min/max bounds of 1.47V and 1.53V per the Electrical Characteristics table. Line regulation is ±0.4%/V across 2.5–5.5V input, ensuring stability across Li-Ion discharge profiles.
Can the LTC3410BESC6-1.5#TRPBF operate from a 2.5V input supply?
Yes, the LTC3410BESC6-1.5#TRPBF is fully specified to operate from 2.5V input, meeting all electrical characteristics including startup, regulation, and efficiency down to this minimum. Its undervoltage lockout threshold is 2.0V (rising) and 1.94V (falling), providing 500mV headroom below 2.5V. At 2.5V input and 1.5V output, it achieves ~92% efficiency at 100mA with proper inductor selection (e.g., 4.7µH, low DCR).
Does the LTC3410BESC6-1.5#TRPBF require external feedback resistors?
No, the LTC3410BESC6-1.5#TRPBF is a fixed-output variant with internal resistive divider connected to Pin 6 (VOUT). Unlike the adjustable LTC3410BE, it does not use the VFB pin and requires no external resistors. The internal 0.8V reference and precision divider set VOUT to exactly 1.5V - simplifying layout, reducing component count, and eliminating resistor tolerance errors.
What is the maximum continuous output current supported by the LTC3410BESC6-1.5#TRPBF?
The LTC3410BESC6-1.5#TRPBF is rated for 300mA continuous output current under typical conditions (TA ≤ 60°C, adequate PCB copper, 2.2µF ceramic input/output caps). Its minimum peak switch current is 380mA, and absolute maximum peak is 630mA per Absolute Maximum Ratings. Sustained 300mA operation requires thermal derating above 60°C ambient or reduced input voltage to manage RDS(ON)-related losses in the SC70 package.
How does the LTC3410BESC6-1.5#TRPBF behave during short-circuit conditions?
Under output short-circuit, the LTC3410BESC6-1.5#TRPBF reduces its oscillator frequency to ~310kHz (1/7 nominal), limiting inductor current slew rate and preventing thermal runaway. This foldback behavior maintains device safety until fault clearance. Once VOUT recovers above ~0.1V, frequency ramps back to 2.25MHz. No latch-off occurs - regulation resumes automatically after fault removal, provided junction temperature remains below 125°C.
LTC3410BESC6-1.5#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-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
LTC3410BESC6-1.5#TRPBF FAQ
1.How can I place an order for LTC3410BESC6-1.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3410BESC6-1.5#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 LTC3410BESC6-1.5#TRPBF reliable?
The price and inventory of LTC3410BESC6-1.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3410BESC6-1.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3410BESC6-1.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3410BESC6-1.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3410BESC6-1.5#TRPBF?
LTC3410BESC6-1.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3410BESC6-1.5#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 LTC3410BESC6-1.5#TRPBF?
For technical support, including LTC3410BESC6-1.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3410BESC6-1.5#TRPBF requirements.
6.How does Aetrix verify that LTC3410BESC6-1.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3410BESC6-1.5#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 LTC3410BESC6-1.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3410BESC6-1.5#TRPBF?
All LTC3410BESC6-1.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3410BESC6-1.5#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 LTC3410BESC6-1.5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3410BESC6-1.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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