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Analog Devices Inc. LTC3406ES5-1.2#TRMPBF
- Part No.:
- LTC3406ES5-1.2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ES5-1.2#TRMPBF.pdf
- Description:
- IC REG BUCK 1.2V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,591
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Product details
Overview
LTC3406ES5-1.2#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, monolithic synchronous step-down DC/DC regulator in a 5-lead TSOT-23 package. It delivers up to 600mA output current with 1.2V fixed output, operates from 2.5V–5.5V input, achieves up to 90% efficiency, and features 1.5MHz constant-frequency current-mode control - ideal for single Li-Ion battery-powered portable electronics requiring low profile (<1mm height) and ultra-low quiescent current.
For engineers reviewing the LTC3406ES5-1.2#TRMPBF datasheet, LTC3406ES5-1.2#TRMPBF pinout, LTC3406ES5-1.2#TRMPBF application, or LTC3406ES5-1.2#TRMPBF equivalent, key selection criteria include its 20µA operating quiescent current, internal synchronous FETs eliminating external Schottky diodes, 100% duty-cycle capability for low-dropout operation, Burst Mode™ for light-load efficiency, and overtemperature protection - all critical for battery life and thermal reliability in space-constrained designs.
Technical Context
The LTC3406ES5-1.2#TRMPBF employs a constant-frequency (1.5MHz nominal), current-mode architecture with integrated P-channel main and N-channel synchronous switches. Its error amplifier controls peak inductor current via a slope-compensated current comparator, enabling fast line and load transient response.
Burst Mode™ operation reduces quiescent current to 20µA at light loads by intermittently enabling switching cycles; shutdown draws <1µA. Overvoltage lockout (2.5–10% above VOUT) and thermal shutdown (TJ ≈ 150°C) provide robust fault protection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±3% (1.164V–1.236V) - ensures stable core voltage for low-power microcontrollers and RF ICs. |
| Input Voltage Range | 2.5V to 5.5V - supports full discharge curve of single Li-Ion (2.7V–4.2V) and USB-powered systems. |
| Max Output Current | 600mA continuous - sufficient for baseband processors, PMIC rails, and wireless modems in handheld devices. |
| Switching Frequency | 1.5MHz (typ), 1.2–1.8MHz (min–max) - enables use of compact 2.2µH inductors and ceramic capacitors ≤10µF. |
| Quiescent Current | 20µA (active), <1µA (shutdown) - extends battery runtime in standby and sleep modes. |
| RDS(ON) | P-FET: 0.4Ω (typ), N-FET: 0.35Ω (typ) - minimizes I²R losses at medium-to-high load currents. |
| Operating Temp | –40°C to +85°C - qualified for industrial and consumer portable equipment environments. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, JEDEC MO-193 compliant, θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/Shutdown Control Input | Logic-level input: >1.5V enables regulation; <0.3V forces shutdown with <1µA supply current - allows host MCU or power sequencer control. |
| GND (Pin 2) | Power Ground Reference | Primary return path for VIN, SW, and feedback circuits - must be low-impedance connection to minimize noise and voltage drop. |
| SW (Pin 3) | Switch Node | Connection point between internal P-FET drain and N-FET source - routes high di/dt switching current to external inductor; requires short, wide PCB trace. |
| VIN (Pin 4) | Main Input Supply | Input power rail (2.5V–5.5V); must be decoupled with ≥4.7µF ceramic capacitor placed adjacent to pin to suppress high-frequency ripple. |
| VOUT (Pin 5) | Output Voltage Feedback | Internally regulated 1.2V output; connects directly to load - no external resistor divider required due to fixed-output configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated P- and N-channel MOSFETs eliminate external Schottky diode - reduces BOM count, improves efficiency by ~5–10% vs. asynchronous designs. |
| Burst Mode™ Operation | Reduces quiescent current to 20µA at light loads while maintaining regulation - critical for >100-hour standby in IoT sensors and wearables. |
| 100% Duty Cycle Capability | Enables dropout operation down to VOUT - extends usable battery life when input voltage approaches 1.2V during deep discharge. |
| Overtemperature Protection | Thermal shutdown activates at ~150°C junction temperature - prevents permanent damage under sustained overload or poor heatsinking. |
| Low-Profile TSOT-23 Package | 1mm max height, 2.9mm × 1.6mm footprint - fits tight board real estate in smartphones, TWS earbuds, and medical patches. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage in GSM/UMTS handsets operating from single Li-Ion battery. IC Role / Device Role / Timing Role: Primary 1.2V step-down regulator delivering up to 600mA with fast load transient response to handle burst transmission demands. Use Value: 90% peak efficiency and 20µA quiescent current maximize talk time and standby duration across 2.7V–4.2V battery range. |
Use Scenario: Supplying image sensor and ISP core voltage during photo capture and video recording. IC Role / Device Role / Timing Role: Fixed 1.2V regulator supporting high-current pulses (up to 600mA) during sensor readout and ADC conversion. Use Value: 1.5MHz switching frequency enables small 2.2µH inductor and 10µF ceramic output cap - minimizing solution size without sacrificing transient performance. |
| Wireless Modems | Portable Instruments |
Use Scenario: Providing stable 1.2V rail to Wi-Fi/BT SoC in portable hotspot or M2M module. IC Role / Device Role / Timing Role: Synchronous buck converter managing dynamic load steps from 10mA (idle) to 500mA (transmit). Use Value: Burst Mode™ maintains >85% efficiency at 1mA load, while current-mode control limits output voltage deviation to <50mV during 100mA–600mA transients. |
Use Scenario: Powering microcontroller, display driver, and analog front-end in handheld test meters and environmental sensors. IC Role / Device Role / Timing Role: Compact, thermally robust 1.2V supply enabling operation from 2.5V input (e.g., coin cell + boost) or direct Li-Ion. Use Value: TSOT-23 package and internal FETs reduce total solution area to <15mm² - critical for pocket-sized form factors with strict height constraints. |
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 |
|---|---|---|---|
| LTC3405ES5-1.2#TRMPBF | Same 5-lead TSOT-23 package and 1.2V fixed output, but rated for 300mA max output current and uses different internal compensation. | Lower current capability makes it suitable only for ultra-low-power MCUs or sensors - not interchangeable for 600mA loads. | Select LTC3406ES5-1.2#TRMPBF when ≥600mA continuous output is required; LTC3405ES5-1.2#TRMPBF only where load current stays below 300mA. |
| LTC3403EDD-1.2#TRPBF | 600mA output, 1.5MHz, same input range, but in 8-lead DFN (3mm × 2mm) with adjustable output (requires external resistors) and bypass transistor. | DFN package offers better thermal performance (θJA ≈ 120°C/W) but larger footprint; adjustable VOUT adds flexibility at cost of BOM complexity. | Choose LTC3403EDD-1.2#TRPBF if thermal headroom is critical or output voltage adjustment is needed; LTC3406ES5-1.2#TRMPBF preferred for fixed 1.2V, minimal footprint, and lowest assembly cost. |
Compared with LTC3405ES5-1.2#TRMPBF, the LTC3406ES5-1.2#TRMPBF doubles output current capability while retaining identical package and quiescent current; versus LTC3403EDD-1.2#TRPBF, it trades adjustability and thermal margin for smaller size and simpler layout - making it optimal for cost-sensitive, space-constrained 600mA fixed-VOUT applications.
Availability
LTC3406ES5-1.2#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, wireless modems, and portable instruments requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3406ES5-1.2#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 characterization and automotive-grade reliability testing.
The LTC3406 family was designed specifically for ultra-thin, battery-powered portable electronics demanding high efficiency at both full and light loads - emphasizing low quiescent current, small solution size, and seamless integration into compact PCB layouts.
FAQ
What is the maximum continuous output current of the LTC3406ES5-1.2#TRMPBF?
The LTC3406ES5-1.2#TRMPBF delivers up to 600mA continuous output current when VIN ≥ 3V and ambient temperature is ≤85°C. At lower input voltages (e.g., VIN = 2.7V), output current may derate slightly due to reduced duty cycle headroom and increased conduction losses - refer to the "Output Voltage vs Load Current" graph in the datasheet for precise derating curves.
Does the LTC3406ES5-1.2#TRMPBF require an external Schottky diode?
No, the LTC3406ES5-1.2#TRMPBF does not require an external Schottky diode. It integrates both a P-channel main switch and an N-channel synchronous rectifier, enabling fully synchronous operation that eliminates diode forward-voltage loss and improves efficiency by 5–10% compared to asynchronous buck regulators.
What is the purpose of the RUN pin on the LTC3406ES5-1.2#TRMPBF?
The RUN pin (Pin 1) on the LTC3406ES5-1.2#TRMPBF controls device enable/disable functionality. Driving RUN >1.5V enables regulation; pulling RUN <0.3V places the device in shutdown mode, reducing supply current to <1µA. The pin must never be left floating - tie to VIN through a pull-up or to GND through a control signal to ensure deterministic operation.
Can the LTC3406ES5-1.2#TRMPBF operate with input voltage as low as 2.5V?
Yes, the LTC3406ES5-1.2#TRMPBF is fully specified to operate from 2.5V to 5.5V input. At 2.5V input, it maintains regulation at 1.2V output with up to 600mA load using 100% duty cycle - critical for extending runtime near end-of-discharge in single Li-Ion systems. Efficiency drops modestly below 80% at light loads due to fixed gate drive losses.
What package type is used for the LTC3406ES5-1.2#TRMPBF?
The LTC3406ES5-1.2#TRMPBF is housed in a 5-lead TSOT-23 (ThinSOT™) package measuring 2.9mm × 1.6mm × 1.0mm max height. This JEDEC MO-193-compliant package provides excellent thermal performance for its size (θJA = 250°C/W) and is optimized for automated placement in high-density portable electronics assemblies.
LTC3406ES5-1.2#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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LTC3406ES5-1.2#TRMPBF FAQ
1.How can I place an order for LTC3406ES5-1.2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRMPBF reliable?
The price and inventory of LTC3406ES5-1.2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406ES5-1.2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ES5-1.2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ES5-1.2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ES5-1.2#TRMPBF?
LTC3406ES5-1.2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRMPBF?
For technical support, including LTC3406ES5-1.2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ES5-1.2#TRMPBF requirements.
6.How does Aetrix verify that LTC3406ES5-1.2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ES5-1.2#TRMPBF?
All LTC3406ES5-1.2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406ES5-1.2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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