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Analog Devices Inc. LTC3406AIS5#TRPBF
- Part No.:
- LTC3406AIS5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406AIS5#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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Product details
Overview
LTC3406AIS5#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, constant-frequency, current-mode synchronous step-down DC/DC regulator optimized for single Li-Ion battery-powered systems. It delivers up to 600mA output current with 2.5V–5.5V input range, 1.5MHz switching frequency, 0.6V feedback reference, and 100% duty cycle low-dropout operation - enabling extended runtime in portable instruments and media players.
For engineers reviewing the LTC3406AIS5#TRPBF datasheet, LTC3406AIS5#TRPBF pinout, LTC3406AIS5#TRPBF application, or LTC3406AIS5#TRPBF equivalent, key selection criteria include quiescent current (20μA active / ≤1μA shutdown), ±2% reference accuracy, internal soft-start (0.9ms), thermal protection, and ThinSOT-23 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC3406AIS5#TRPBF implements a monolithic current-mode buck architecture with integrated P-channel main switch (RDS(ON) = 0.23Ω typ) and N-channel synchronous rectifier (RDS(ON) = 0.21Ω typ), eliminating external Schottky diodes. Its fixed 1.5MHz oscillator enables compact 2.2μH inductor and ceramic capacitor designs while slope compensation ensures stability at >40% duty cycles.
Burst Mode® operation activates automatically below ~100mA load, reducing supply current to 20μA and minimizing light-load ripple. The RUN pin (1.5V enable threshold) controls startup/shutdown, and the 0.6V feedback reference supports output voltages from 0.6V to 5.5V via external resistor divider - critical for precision point-of-load regulation in battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600mA max - sufficient for core logic rails in cellular phones and DSL modems |
| Input Voltage Range | 2.5V to 5.5V - matches full discharge-to-charge profile of single Li-Ion cells |
| Switching Frequency | 1.5MHz (typ) - enables use of sub-3mm surface-mount inductors and low-ESR ceramics |
| Feedback Reference | 0.6V ±2% - allows precise adjustable outputs down to 0.6V with minimal resistor tolerance impact |
| Quiescent Current | 20μA (active), ≤1μA (shutdown) - extends standby time in always-on portable instrumentation |
| Efficiency | Up to 96% - achieved via synchronous rectification and low RDS(ON) switches |
| Duty Cycle | 100% - maintains regulation as input drops to within ~200mV of output voltage |
Pinout & Package
Package: 5-lead ThinSOT-23 (TSOT-23), 1mm height, RoHS-compliant, rated for –40°C to +125°C operating junction temperature (LTC3406AI grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable control input | Pull ≥1.5V to enable regulator; pull ≤0.3V to enter shutdown (≤1μA IQ) |
| GND (Pin 2) | Power ground reference | Common return for VIN decoupling, feedback divider, and SW node current path |
| SW (Pin 3) | Switch node | Connects to inductor; carries pulsed current from internal P- and N-channel MOSFETs |
| VIN (Pin 4) | Main power input | Requires ≥2.2μF ceramic decoupling close to pin to suppress high-frequency switching noise |
| VFB (Pin 5) | Feedback input | Monitors resistive divider output; regulates VOUT to 0.6V × (1 + R2/R1) |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectification | Eliminates external Schottky diode, improving efficiency by ~5–10% and reducing BOM count |
| Burst Mode® operation | Reduces quiescent current to 20μA at light loads while maintaining low output ripple |
| 100% duty cycle capability | Extends usable battery life by sustaining regulation down to VIN ≈ VOUT + ILOAD × RDS(ON) |
| Internal soft-start | 0.9ms ramp time limits inrush current during startup, preventing input rail sag |
| Overtemperature protection | Thermal shutdown activates above ~150°C junction temperature to prevent permanent damage |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor core voltage (1.2V/600mA) from single Li-Ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing stable, low-noise core supply with Burst Mode® for standby efficiency. Use Value: 96% peak efficiency and 20μA quiescent current extend talk time and standby duration beyond competing solutions. |
Use Scenario: Generating 1.8V/600mA RF transceiver supply in 802.11n client modules with tight board area constraints. IC Role / Device Role / Timing Role: Compact, high-frequency step-down converter enabling small 2.2μH inductor and 0402 ceramic capacitors. Use Value: 1.5MHz operation reduces EMI filter size and simplifies layout versus lower-frequency alternatives. |
| Digital Still Cameras | Portable Instruments |
Use Scenario: Supplying image sensor analog front-end (2.5V/600mA) with fast transient response during burst capture mode. IC Role / Device Role / Timing Role: Current-mode buck regulator delivering excellent line/load transient response (<20μs recovery) without external compensation. Use Value: Internal slope compensation and fast error amplifier maintain stability across wide input/output voltage combinations. |
Use Scenario: Regulating microcontroller I/O rail (3.3V/600mA) in handheld test equipment powered by rechargeable Li-Ion packs. IC Role / Device Role / Timing Role: Robust, thermally protected DC/DC converter supporting industrial temperature range (–40°C to +125°C). Use Value: Guaranteed performance over full –40°C to +125°C junction range eliminates derating concerns in sealed enclosures. |
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 |
|---|---|---|---|
| TPS62231DRVR | 2.05V–6.5V input; 3MHz switching; 0.6V reference; 400mA output; 12μA IQ | Higher frequency enables smaller passives but lower output current limits use in 600mA designs | Select when board space is more constrained than current demand, and input exceeds 5.5V |
| MAX17222ETA+T | 2.0V–5.5V input; 1.2MHz; 0.6V reference; 500mA output; 1.6μA shutdown IQ | Slightly lower max current and higher dropout limit suitability for 600mA continuous loads | Prefer for ultra-low shutdown current requirements where 500mA peak suffices |
Compared with TPS62231DRVR and MAX17222ETA+T, the LTC3406AIS5#TRPBF provides the highest guaranteed output current (600mA) within its 2.5V–5.5V input range and offers superior thermal robustness across –40°C to +125°C, making it optimal for industrial portable instruments requiring sustained full-load operation.
Availability
LTC3406AIS5#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital still cameras, and portable instruments requiring stable component supply with guaranteed industrial temperature range support.
Supply support for LTC3406AIS5#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 its legacy of high-performance power management ICs with rigorous automotive and industrial qualification standards.
The LTC3406AIS5#TRPBF belongs to Linear's ThinSOT™ synchronous buck regulator family, designed specifically for space- and efficiency-critical portable electronics powered by single-cell Li-Ion batteries.
FAQ
What is the maximum output current supported by the LTC3406AIS5#TRPBF?
The LTC3406AIS5#TRPBF is rated for continuous output current up to 600mA under typical thermal conditions. This rating assumes proper PCB layout with adequate copper pour for heat dissipation and operation within the –40°C to +125°C junction temperature limit. Peak inductor current capability reaches 1.25A, supporting transient loads beyond steady-state requirements.
Does the LTC3406AIS5#TRPBF require an external Schottky diode?
No, the LTC3406AIS5#TRPBF does not require an external Schottky diode. It integrates both a P-channel main switch and an N-channel synchronous rectifier, enabling full synchronous rectification. This eliminates conduction losses associated with external diodes and improves overall efficiency by 5–10% compared to asynchronous buck topologies.
What is the purpose of the RUN pin on the LTC3406AIS5#TRPBF?
The RUN pin on the LTC3406AIS5#TRPBF serves as the enable/disable control input. Driving it to ≥1.5V enables normal operation; pulling it to ≤0.3V places the device in shutdown mode, reducing supply current to ≤1μA. Leaving the RUN pin floating is prohibited - it must be actively driven or pulled to GND via a resistor to ensure predictable startup behavior.
Can the LTC3406AIS5#TRPBF operate with input voltage equal to the output voltage?
Yes, the LTC3406AIS5#TRPBF supports 100% duty cycle operation, allowing it to maintain regulation when input voltage approaches the output voltage - critical for maximizing battery runtime in Li-Ion systems. At VIN ≈ VOUT, output voltage equals VIN minus ILOAD × RDS(ON) of the P-channel switch, with RDS(ON) increasing at elevated temperatures.
What package type and dimensions does the LTC3406AIS5#TRPBF use?
The LTC3406AIS5#TRPBF uses a 5-lead ThinSOT-23 (TSOT-23) package measuring 2.9mm × 1.6mm × 1.0mm (L × W × H). Its low-profile construction and exposed pad-free design simplify assembly in ultra-thin portable devices. The part marking "LTCWJ" appears on the top surface, and the package is lead-free and RoHS-compliant.
LTC3406AIS5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LTC3406AIS5#TRPBF FAQ
1.How can I place an order for LTC3406AIS5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406AIS5#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 LTC3406AIS5#TRPBF reliable?
The price and inventory of LTC3406AIS5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406AIS5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3406AIS5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406AIS5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406AIS5#TRPBF?
LTC3406AIS5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406AIS5#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 LTC3406AIS5#TRPBF?
For technical support, including LTC3406AIS5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406AIS5#TRPBF requirements.
6.How does Aetrix verify that LTC3406AIS5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406AIS5#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 LTC3406AIS5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3406AIS5#TRPBF?
All LTC3406AIS5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406AIS5#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 LTC3406AIS5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3406AIS5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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