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Analog Devices Inc. LTC3406ES5-1.8#TRPBF
- Part No.:
- LTC3406ES5-1.8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ES5-1.8#TRPBF.pdf
- Description:
- IC REG BUCK 1.8V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,711
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Product details
Overview
LTC3406ES5-1.8#TRPBF 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#TRPBF datasheet, LTC3406ES5-1.8#TRPBF pinout, LTC3406ES5-1.8#TRPBF application, or LTC3406ES5-1.8#TRPBF 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® support for sub-1mA load efficiency.
Technical Context
The LTC3406ES5-1.8#TRPBF employs a constant-frequency, current-mode architecture with internal slope compensation to prevent subharmonic oscillation above 40% duty cycle. Its dual-MOSFET synchronous rectification eliminates external Schottky diode requirements while enabling 100% duty-cycle operation for extended battery runtime during input voltage sag.
Burst Mode® dynamically disables switching and circuitry during light loads, reducing supply current to 20µA and maintaining >85% efficiency down to 0.1mA output. Short-circuit protection folds oscillator frequency to 210kHz to limit inductor current and prevent thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.800V ±2.7% (1.746V–1.854V) at 100mA load; enables precise core logic rail regulation |
| Max Output Current | 600mA continuous; supports high-pulse digital loads like cellular baseband processors |
| Input Voltage Range | 2.5V to 5.5V; fully compatible with single-cell Li-ion (2.7V–4.2V) and USB-powered systems |
| Switching Frequency | 1.5MHz (typ), 1.2–1.8MHz (min–max); permits use of compact 2.2µH inductors and ceramic capacitors |
| Quiescent Current | 20µA in active mode, ≤1µA in shutdown; extends standby time in always-on IoT sensors |
| Efficiency Peak | 96% at 600mA, VIN=3.6V, VOUT=1.8V; minimizes thermal stress in sealed handheld enclosures |
| Feedback Reference | 0.600V ±0.015V (–40°C to +85°C); enables accurate low-VOUT regulation without external resistors |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, 0.95mm × 2.9mm footprint - optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/Shutdown Control Input | Logic-high ≥1.5V enables regulation; logic-low ≤0.3V forces ≤1µA shutdown current; must not float |
| GND (Pin 2) | Power Ground Reference | Primary return path for input/output currents and feedback reference; requires low-impedance PCB plane |
| SW (Pin 3) | Internal Switch Node | Connects to drains of integrated P- and N-channel MOSFETs; high dv/dt node requiring short, direct routing |
| VIN (Pin 4) | Main Power Input | Supplies internal circuitry and power switches; requires local 2.2µF ceramic decoupling to GND |
| VOUT (Pin 5) | Fixed-Output Feedback Sense | Internally connected to 1.8V divider output; provides regulated 1.8V reference without external resistors |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated P/N-channel MOSFETs eliminate external Schottky diode, reducing BOM count and forward drop losses |
| Burst Mode® Operation | Reduces quiescent current to 20µA at light loads while maintaining >85% efficiency down to 0.1mA |
| 100% Duty-Cycle Dropout | Enables regulation when VIN approaches VOUT (e.g., 2.0V → 1.8V), extending usable battery voltage range |
| Current-Mode Control | Provides inherent cycle-by-cycle current limiting and superior transient response to load steps up to 600mA |
| Overtemperature Protection | Thermal shutdown activates at ~150°C junction temperature, preventing damage during sustained overload or poor airflow |
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 load transient response to burst-mode RF transmission. Use Value: 96% efficiency at 600mA and 20µA quiescent current extend talk time by >12% versus non-synchronous alternatives. | Use Scenario: Supplying image sensor and ISP core logic in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Fixed 1.8V output regulator supporting rapid on/off sequencing during capture bursts. Use Value: 100% duty-cycle operation maintains stable 1.8V rail down to 2.0V input, enabling full functionality until battery reaches end-of-discharge. |
| Wireless Modems | Portable Instruments |
Use Scenario: Regulating 1.8V I/O and PHY voltage in LTE/Wi-Fi USB dongles with tight thermal constraints. IC Role / Device Role / Timing Role: High-frequency (1.5MHz) buck converter minimizing EMI interference with adjacent RF sections. Use Value: Small 2.2µH inductor and ceramic capacitor solution fits within 12mm² PCB area, meeting USB form factor limits. | Use Scenario: Providing precision 1.8V supply for microcontroller peripherals and ADC reference in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise, tightly regulated rail generator with <±2.7% output tolerance across temperature. Use Value: 0.6V internal reference and ±30nA feedback current ensure <10mV output drift over –40°C to +85°C, preserving measurement accuracy. |
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, 600mA, 3MHz switching, 17µA IQ; smaller 1.5mm × 1.5mm DSBGA package | Higher frequency enables smaller passives but increases EMI sensitivity in noise-critical analog sections | Select for ultra-compact layouts where 3MHz operation and DSBGA thermal performance outweigh need for Burst Mode® efficiency at sub-1mA loads |
| MP2108DQ-LF-Z | Fixed 1.8V, 600mA, 1.5MHz, 30µA IQ; no Burst Mode, wider -40°C to +125°C rating | Lacks light-load efficiency optimization; better suited for industrial environments with extended temperature requirements | Select when ambient temperature exceeds +85°C or when simplified control (no RUN pin) is preferred over lowest IQ |
Compared with TPS62231DRYR and MP2108DQ-LF-Z, the LTC3406ES5-1.8#TRPBF delivers superior light-load efficiency via Burst Mode® and tighter output voltage accuracy (±2.7% vs ±3% typical), making it optimal for battery life–critical portable designs despite its slightly larger TSOT-23 footprint.
Availability
LTC3406ES5-1.8#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, wireless modems, portable instruments, and MP3 players requiring stable component supply across production lifecycles.
Supply support for LTC3406ES5-1.8#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-grade qualification and long-term product support.
The LTC3406 family was designed specifically for space- and efficiency-constrained portable electronics, emphasizing ultra-low quiescent current, integrated synchronous FETs, and robust operation across the full Li-ion voltage range.
FAQ
What is the maximum output current capability of the LTC3406ES5-1.8#TRPBF?
The LTC3406ES5-1.8#TRPBF delivers up to 600mA continuous output current at 1.8V under typical conditions (VIN = 3.6V, TA = 25°C). Derating applies at higher ambient temperatures or lower input voltages-e.g., maximum output drops to ~400mA at VIN = 2.7V and TA = 85°C per Figure 2 in the datasheet. The device includes overtemperature protection that disables switching if junction temperature exceeds ~150°C.
Does the LTC3406ES5-1.8#TRPBF require an external Schottky diode?
No, the LTC3406ES5-1.8#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 efficiency-especially at higher load currents-while reducing board area and component count.
What is the function of the RUN pin on the LTC3406ES5-1.8#TRPBF?
The RUN pin (Pin 1) controls enable/disable functionality of the LTC3406ES5-1.8#TRPBF. Driving RUN ≥1.5V enables regulation; pulling RUN ≤0.3V places the device in shutdown mode, reducing supply current to ≤1µA. RUN must never be left floating, as indeterminate voltage may cause erratic startup or increased leakage. A pull-up resistor to VIN is recommended for default-enable configurations.
Can the LTC3406ES5-1.8#TRPBF operate with input voltage below 2.5V?
No-the absolute minimum input voltage for the LTC3406ES5-1.8#TRPBF is 2.5V, as specified in Absolute Maximum Ratings. Operation below this threshold risks improper biasing of internal circuits and undefined behavior. In dropout, the device supports 100% duty cycle down to VIN ≈ VOUT (e.g., 2.0V input for 1.8V output), but only when VIN remains ≥2.5V. Below 2.5V, the part will cease regulation and may latch off.
How does Burst Mode® improve efficiency at light loads for the LTC3406ES5-1.8#TRPBF?
Burst Mode® improves light-load efficiency by temporarily disabling switching and non-essential circuitry, reducing quiescent current to 20µA. During each burst, the internal switches deliver a controlled energy packet (~200mA peak inductor current), then enter sleep until output voltage droop triggers the next burst. This avoids continuous switching losses, sustaining >85% efficiency down to 0.1mA load-critical for battery longevity in standby or sensor-monitoring modes.
LTC3406ES5-1.8#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:
- 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#TRPBF FAQ
1.How can I place an order for LTC3406ES5-1.8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRPBF reliable?
The price and inventory of LTC3406ES5-1.8#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ES5-1.8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ES5-1.8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ES5-1.8#TRPBF?
LTC3406ES5-1.8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRPBF?
For technical support, including LTC3406ES5-1.8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ES5-1.8#TRPBF requirements.
6.How does Aetrix verify that LTC3406ES5-1.8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ES5-1.8#TRPBF?
All LTC3406ES5-1.8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ES5-1.8#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 LTC3406ES5-1.8#TRPBF part is unused and in its original packaging.
Return procedure for LTC3406ES5-1.8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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