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Analog Devices Inc. LTC3406ES5-1.8#TRMPBF
- Part No.:
- LTC3406ES5-1.8#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ES5-1.8#TRMPBF.pdf
- Description:
- IC REG BUCK 1.8V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,291
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Product details
Overview
LTC3406ES5-1.8#TRMPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC regulator in TSOT-23-5 package, delivering up to 600mA at fixed 1.8V output from 2.5V–5.5V input. It features 1.5MHz constant-frequency current-mode control, 96% peak efficiency, 20µA operating quiescent current, and 100% duty-cycle low-dropout operation-optimized for single Li-ion battery-powered portable electronics.
For engineers reviewing the LTC3406ES5-1.8#TRMPBF datasheet, LTC3406ES5-1.8#TRMPBF pinout, LTC3406ES5-1.8#TRMPBF application, or LTC3406ES5-1.8#TRMPBF equivalent, key selection criteria include verified 1.8V ±2.7% output accuracy at 600mA, guaranteed -40°C to +85°C operation, integrated P/N-channel MOSFETs with RDS(ON) ≤ 0.5Ω, and Burst Mode™ operation enabling ultra-low IQ under light load.
Technical Context
The LTC3406ES5-1.8#TRMPBF employs a constant-frequency, current-mode architecture with internal slope compensation to prevent subharmonic oscillation above 40% duty cycle. Its control loop uses an error amplifier comparing a 0.6V reference against the internally divided VOUT feedback signal.
Burst Mode™ operation activates below ~200mA load, reducing switching frequency to ~210kHz during sleep intervals and lowering supply current to 20µA; shutdown draws ≤1µA. Short-circuit protection triggers oscillator foldback to 210kHz, while thermal shutdown disables both switches if junction temperature exceeds ~150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.800V ±2.7% (1.746V–1.854V) at 100mA load; supports stable rail for 1.8V logic and RF ICs |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (2.7V–4.2V) and USB-powered systems |
| Max Output Current | 600mA continuous - sufficient for baseband processors, PMIC subsystems, and sensor hubs |
| Switching Frequency | 1.5MHz (typ), 1.2–1.8MHz (min–max) - enables use of compact 2.2µH inductors and ceramic capacitors |
| Quiescent Current | 20µA in active Burst Mode™ - extends battery runtime in standby and low-power states |
| Shutdown Current | ≤1µA - meets stringent off-state leakage requirements for always-on subsystems |
| Efficiency Peak | 96% at mid-load - minimizes thermal stress and power loss in space-constrained PCB layouts |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, 0.95mm × 2.9mm footprint - optimized for high-density portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/Shutdown Control Input | Logic-high ≥1.5V enables regulation; ≤0.3V forces shutdown with ≤1µA IQ; must not float |
| GND (Pin 2) | Power and Signal Ground Reference | Common return path for VIN, SW, and feedback; requires low-impedance PCB connection to minimize noise |
| SW (Pin 3) | Internal Switch Node | Connects to drains of integrated P- and N-channel MOSFETs; carries high di/dt square-wave current |
| VIN (Pin 4) | Main Input Supply | Accepts 2.5V–5.5V; requires local 2.2µF+ ceramic decoupling directly to GND (Pin 2) |
| VOUT (Pin 5) | Fixed-Output Feedback Node | Internally connected to 1.8V divider; no external resistor network required - simplifies layout and reduces BOM count |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Eliminates external Schottky diode - reduces component count, improves efficiency by 5–10% vs. asynchronous designs |
| 100% Duty Cycle Operation | Enables dropout down to VIN ≈ VOUT + ILOAD×RDS(ON) - extends usable battery voltage range in Li-ion applications |
| Integrated 0.6V Reference | Supports precise 1.8V output via internal resistive divider - eliminates external feedback resistors and associated tolerance errors |
| Overtemperature Protection | Thermal shutdown at ~150°C junction temperature - prevents damage during sustained overload or poor heatsinking |
| Burst Mode™ Efficiency | Maintains >85% efficiency at 1mA load - critical for maintaining long standby time in IoT and wearable devices |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage in GSM/UMTS handsets operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary 1.8V system rail regulator with fast transient response to handle burst-mode transmission current spikes. Use Value: 96% peak efficiency and 20µA Burst Mode™ IQ extend talk time by >12% versus comparable non-synchronous regulators. | Use Scenario: Supplying image sensor interface and ISP core logic in compact digital cameras. IC Role / Device Role / Timing Role: Fixed 1.8V LDO-replacement buck converter delivering clean, regulated power with minimal PCB area. Use Value: TSOT-23-5 footprint and integrated MOSFETs reduce solution size by 40% vs. discrete buck solutions requiring external FETs and diode. |
| Wireless Modems | Portable Instruments |
Use Scenario: Generating 1.8V supply for Wi-Fi/BT combo chip in battery-powered home gateways and mesh nodes. IC Role / Device Role / Timing Role: High-efficiency intermediate rail converter supporting dynamic load changes during packet transmission. Use Value: 1.5MHz switching allows use of 2.2µH inductor and 10µF ceramic output cap - achieves <15mV p-p ripple without ESR dependency. | Use Scenario: Powering microcontroller peripherals and analog front-end in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise, thermally robust 1.8V regulator supporting precision ADC references and sensor biasing. Use Value: Guaranteed -40°C to +85°C operation and 0.5Ω max RDS(ON) ensure stable output across industrial ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.8V output, 1.8MHz fSW, 30µA IQ, same TSOT-23-5 package but higher RDS(ON) (0.65Ω typ) | Lower efficiency at 600mA due to higher conduction loss; less suitable for high-ambient-temperature Li-ion systems | Select when higher switching frequency enables smaller magnetics, accepting 3–5% lower full-load efficiency |
| RT8059GJ6 | Fixed 1.8V output, 1.5MHz fSW, 25µA IQ, 6-pin WDFN package - different pinout and layout | Requires PCB redesign; lacks guaranteed -40°C operation (rated -20°C to +85°C) | Choose only for new designs where WDFN thermal performance justifies layout change and extended temp range is not required |
Compared with TPS62231DRYR and RT8059GJ6, the LTC3406ES5-1.8#TRMPBF delivers superior light-load efficiency via Burst Mode™, tighter output voltage accuracy (±2.7% vs. ±3.5%), and broader industrial temperature qualification - making it preferred for mission-critical portable battery systems.
Availability
LTC3406ES5-1.8#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital still cameras, and portable instruments requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3406ES5-1.8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3406 product line was designed specifically for ultra-efficient, space-constrained portable power conversion - targeting single-cell Li-ion applications demanding high light-load efficiency, low profile, and minimal external components.
FAQ
What is the guaranteed output voltage tolerance for LTC3406ES5-1.8#TRMPBF across temperature and load?
The LTC3406ES5-1.8#TRMPBF guarantees 1.746V to 1.854V (±2.7%) at 100mA load over –40°C to +85°C ambient. This is confirmed by Electrical Characteristics table data specifying min/max output voltage under defined test conditions, not typical-only values. The internal 0.6V reference exhibits ±0.015V drift over temperature, contributing directly to this tight tolerance band.
Does LTC3406ES5-1.8#TRMPBF require external feedback resistors?
No. The LTC3406ES5-1.8#TRMPBF integrates a precision resistive divider that sets the output to 1.8V - Pin 5 is labeled VOUT (not VFB) and connects directly to the internal divider node. Unlike the adjustable LTC3406 variant, no external R1/R2 network is needed, reducing BOM cost and layout sensitivity.
What is the maximum recommended output current for LTC3406ES5-1.8#TRMPBF at 2.7V input?
At 2.7V input, the LTC3406ES5-1.8#TRMPBF supports up to 600mA output, but thermal limits constrain sustained operation. As shown in Figure 2 of the datasheet, maximum output current remains 600mA down to 2.7V for 1.8V output. However, junction temperature must be verified: at 600mA and 2.7V, PD ≈ 187mW yields TJ = 117°C (with θJA = 250°C/W), staying within the 125°C limit.
How does Burst Mode™ operation affect the output voltage ripple of LTC3406ES5-1.8#TRMPBF?
In Burst Mode™, LTC3406ES5-1.8#TRMPBF reduces switching frequency and operates in intermittent bursts, causing low-frequency (1–10kHz) envelope ripple superimposed on the 1.5MHz fundamental. This results in higher peak-to-peak output ripple than continuous mode - typically 20–30mV p-p at light loads - but maintains regulation accuracy. Ceramic output capacitors with low ESL minimize this effect.
Is LTC3406ES5-1.8#TRMPBF RoHS-compliant and lead-free?
Yes. The #TRMPBF suffix denotes lead-free (Pb-free), RoHS-compliant packaging per Analog Devices' material declarations. The TSOT-23-5 package uses matte tin (Sn) lead finish, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH.
LTC3406ES5-1.8#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):
- 1.8V
- 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
LTC3406ES5-1.8#TRMPBF FAQ
1.How can I place an order for LTC3406ES5-1.8#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRMPBF reliable?
The price and inventory of LTC3406ES5-1.8#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406ES5-1.8#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ES5-1.8#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ES5-1.8#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ES5-1.8#TRMPBF?
LTC3406ES5-1.8#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRMPBF?
For technical support, including LTC3406ES5-1.8#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ES5-1.8#TRMPBF requirements.
6.How does Aetrix verify that LTC3406ES5-1.8#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ES5-1.8#TRMPBF?
All LTC3406ES5-1.8#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406ES5-1.8#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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