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Analog Devices Inc. LTC3406AIS5#TRMPBF
- Part No.:
- LTC3406AIS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406AIS5#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:512
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Product details
Overview
LTC3406AIS5#TRMPBF 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, operates from 2.5V to 5.5V input, regulates with ±2% accuracy at 0.6V feedback reference, and achieves up to 96% efficiency in continuous mode - enabling extended runtime in portable instrumentation and media players.
For engineers reviewing the LTC3406AIS5#TRMPBF datasheet, LTC3406AIS5#TRMPBF pinout, LTC3406AIS5#TRMPBF application, or LTC3406AIS5#TRMPBF equivalent, key selection criteria include its 1.5MHz fixed switching frequency, 100% duty cycle low-dropout capability, Burst Mode® operation for <20μA quiescent current, and TSOT-23-5 package thermal performance under industrial temperature range (–40°C to 125°C).
Technical Context
The LTC3406AIS5#TRMPBF implements a current-mode control loop with internal P-channel main and N-channel synchronous switches, slope-compensated for stability at >40% duty cycles. Its patented compensation preserves full 1.25A peak inductor current capability across all operating conditions without reduction due to ramp injection.
Burst Mode® operation activates below ~100mA load, disabling power switches between bursts to reduce supply current to 20μA; shutdown draws ≤1μA. The 0.6V reference enables precise output programming down to 0.6V via external resistor divider, while RUN pin logic (0.3V–1.5V threshold) provides controlled enable/disable sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports full single-cell Li-ion discharge profile (4.2V → 2.7V) without input rail regulation. |
| Output Current | 600mA continuous - sufficient for baseband processors, RF transceivers, and sensor subsystems in handheld devices. |
| Switching Frequency | 1.5MHz (typ) - enables use of compact 2.2μH inductors and ceramic capacitors, minimizing board area. |
| Feedback Reference | 0.6V ±2% - allows accurate low-voltage outputs (e.g., 1.2V, 1.8V, 2.5V) with standard 1% resistors. |
| Quiescent Current | 20μA (active), ≤1μA (shutdown) - critical for battery longevity in standby and sleep modes. |
| Operating Temperature | –40°C to 125°C - qualified for industrial and extended-temperature embedded applications. |
| Efficiency Peak | 96% - achieved at mid-load with typical 2.2μH inductor and ceramic output capacitor. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm height, 0.95mm pitch, thermally enhanced pad (θJA = 250°C/W, θJC = 90°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/Shutdown Control Input | Logic-high (>1.5V) enables regulation; logic-low (<0.3V) forces shutdown with ≤1μA supply current - requires pull-up or active control, not left floating. |
| GND (Pin 2) | Power and Signal Ground Reference | Common return for VIN decoupling, SW node current path, and feedback network - must be low-impedance connection to PCB ground plane. |
| SW (Pin 3) | Internal Switch Node | Connects to drains of integrated P- and N-channel MOSFETs - carries high di/dt square-wave current; requires short, wide trace routing away from sensitive nodes. |
| VIN (Pin 4) | Main Power Input | Supplies internal circuitry and switch drivers - requires ≥4.7μF ceramic decoupling placed within 2mm of pin to minimize voltage ripple and EMI. |
| VFB (Pin 5) | Feedback Input | Monitors output voltage via external resistor divider - high-impedance (±30nA bias) node; must be routed away from SW and shielded from noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces conduction loss and improves efficiency by ~5–8% vs. asynchronous designs at 600mA. |
| 100% duty cycle operation | Enables dropout regulation down to VIN – ILOAD×RDS(ON) - extends usable battery life near end-of-discharge (e.g., 2.7V→2.5V @ 600mA). |
| Internal soft-start | 0.9ms (typ) VOUT ramp - limits inrush current into output capacitance, preventing input rail sag and system reset during power-up. |
| Overtemperature protection | Thermal shutdown at ~150°C junction - latches off both switches until cooldown, protecting against sustained overload or poor heatsinking. |
| Burst Mode® low-IQ | 20μA quiescent current with regulated output - maintains voltage accuracy while drawing less than most microcontroller RTC circuits. |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor core voltage (1.2V/600mA) from single Li-ion cell during data transmission bursts. IC Role / Device Role / Timing Role: Primary point-of-load regulator providing dynamically stable, low-noise supply with fast transient response. Use Value: Burst Mode® sustains >120hr standby time; 1.5MHz switching avoids interference with cellular band receivers (e.g., LTE Band 13: 746–756MHz). |
Use Scenario: Supplying 1.8V/600mA to Wi-Fi/BT combo chip in DSL gateway with intermittent high-throughput traffic. IC Role / Device Role / Timing Role: Efficient buck converter enabling rapid wake-from-sleep transitions without brownout. Use Value: 100% duty cycle maintains regulation as input drops from 4.1V to 2.8V; internal soft-start prevents reset during link re-establishment. |
| Digital Still Cameras | Portable Instruments |
Use Scenario: Delivering 2.5V/600mA to image sensor and ISP during capture sequence with millisecond-level load steps. IC Role / Device Role / Timing Role: High-transient-response regulator stabilizing sensor analog supply during exposure readout. Use Value: Current-mode control ensures <50μs recovery from 100mA→600mA load step; low output ripple (<10mVpp) prevents image noise banding. |
Use Scenario: Regulating 1.2V for ARM Cortex-M7 MCU and 2.5V for precision ADC in handheld multimeter with 10-year battery life target. IC Role / Device Role / Timing Role: Dual-output-capable buck controller supporting multiple rail requirements from one battery source. Use Value: 20μA quiescent current enables >8yr shelf life; ±2% reference ensures ADC reference stability over temperature. |
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 | 1.8–6.5V input; 0.6V ref; 600mA; 3.6MHz switching; smaller 6-pin WSON package | Higher fSW enables smaller passives but increases EMI risk near sensitive analog sections | Prefer when board space is constrained and higher-frequency filtering is feasible |
| MAX17552ATC+ | 4.5–40V input; 0.8V ref; 600mA; 100kHz–2.2MHz programmable fSW; integrated compensation | Wider VIN range suits multi-cell or adapter-powered systems; lacks Burst Mode® | Prefer when input exceeds 5.5V or adaptive frequency tuning is required |
Compared with TPS62231DRYR and MAX17552ATC+, the LTC3406AIS5#TRMPBF offers superior light-load efficiency via Burst Mode®, tighter 0.6V reference tolerance (±2% vs. ±3%), and guaranteed –40°C to 125°C operation - making it optimal for battery-powered industrial and portable equipment where thermal margin and standby life are critical.
Availability
LTC3406AIS5#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital still cameras, and portable instruments requiring stable component supply across industrial temperature grades and long production lifecycles.
Supply support for LTC3406AIS5#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 automotive and industrial qualification standards.
The LTC3406A series was designed specifically for ultra-low-power, small-footprint DC/DC conversion in Li-ion–powered portable electronics - emphasizing quiescent current optimization, thermal robustness, and seamless integration with ceramic capacitors.
FAQ
What is the maximum output current capability of the LTC3406AIS5#TRMPBF?
The LTC3406AIS5#TRMPBF is rated for 600mA continuous output current under typical conditions (TA ≤ 85°C, proper layout, and adequate thermal relief). Peak inductor current capability reaches 1.25A, supporting transient loads and ensuring stability during startup and load steps. Derating applies above 85°C ambient or with poor PCB copper area.
Does the LTC3406AIS5#TRMPBF require an external Schottky diode?
No, the LTC3406AIS5#TRMPBF does not require an external Schottky diode. It integrates both P-channel high-side and N-channel low-side synchronous MOSFETs, eliminating conduction losses and heat generation associated with external diodes - improving efficiency by up to 8% at full load compared to asynchronous alternatives.
What is the function of the RUN pin on the LTC3406AIS5#TRMPBF?
The RUN pin on the LTC3406AIS5#TRMPBF controls device enable/disable state. Pulling RUN above 1.5V enables regulation with internal soft-start; pulling RUN below 0.3V places the LTC3406AIS5#TRMPBF in shutdown, reducing supply current to ≤1μA. The pin must never be left floating - a pull-up resistor to VIN is recommended for default-on operation.
Can the LTC3406AIS5#TRMPBF operate in 100% duty cycle mode?
Yes, the LTC3406AIS5#TRMPBF supports true 100% duty cycle operation, allowing output regulation even when input voltage approaches the output level (e.g., 2.7V → 2.5V). In this mode, the P-channel MOSFET remains continuously on, and regulation depends on RDS(ON) and inductor DCR - power dissipation must be verified per thermal analysis guidelines.
What package type and footprint does the LTC3406AIS5#TRMPBF use?
The LTC3406AIS5#TRMPBF uses a 5-lead TSOT-23 (ThinSOT™) package, measuring 2.9mm × 1.6mm × 1.0mm with 0.95mm lead pitch. It features an exposed thermal pad compatible with standard SMT reflow profiles and requires PCB copper pour connected to GND for optimal thermal performance (θJA = 250°C/W).
LTC3406AIS5#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LTC3406AIS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406AIS5#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 LTC3406AIS5#TRMPBF reliable?
The price and inventory of LTC3406AIS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406AIS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406AIS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406AIS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406AIS5#TRMPBF?
LTC3406AIS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406AIS5#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 LTC3406AIS5#TRMPBF?
For technical support, including LTC3406AIS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406AIS5#TRMPBF requirements.
6.How does Aetrix verify that LTC3406AIS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406AIS5#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 LTC3406AIS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406AIS5#TRMPBF?
All LTC3406AIS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406AIS5#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 LTC3406AIS5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406AIS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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