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Analog Devices Inc. LTC3406ES5-1.2#TRPBF
- Part No.:
- LTC3406ES5-1.2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ES5-1.2#TRPBF.pdf
- Description:
- IC REG BUCK 1.2V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,296
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Product details
Overview
LTC3406ES5-1.2#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, constant-frequency synchronous step-down DC/DC regulator in a 5-lead TSOT-23 package. It delivers up to 600mA output current at 1.2V with 2.5V–5.5V input range, 1.5MHz switching frequency, and only 20µA quiescent current-optimized for single Li-Ion battery-powered portable electronics.
For engineers reviewing the LTC3406ES5-1.2#TRPBF datasheet, LTC3406ES5-1.2#TRPBF pinout, LTC3406ES5-1.2#TRPBF application, or LTC3406ES5-1.2#TRPBF equivalent, key selection criteria include its 1.2V fixed output, ThinSOT thermal performance (θJA = 250°C/W), Burst Mode operation for light-load efficiency, internal P/N-channel MOSFETs eliminating external Schottky diodes, and overtemperature protection.
Technical Context
The LTC3406ES5-1.2#TRPBF employs a current-mode, constant-frequency architecture with integrated P-channel main switch (RDS(ON) = 0.4–0.5Ω) and N-channel synchronous rectifier (RDS(ON) = 0.35–0.45Ω). Its 1.5MHz oscillator enables compact 2.2µH inductor and ceramic capacitor designs while maintaining stable regulation across 0.5–600mA load range.
Burst Mode operation reduces quiescent current to 20µA at light loads by intermittently enabling switching cycles; shutdown draws <1µA. Output voltage is internally trimmed to 1.2V ±3% (1.164V–1.236V) with 0.04%/V line regulation and 0.5% load regulation-enabling low-dropout operation via 100% duty cycle capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±3% (1.164V–1.236V) - eliminates external feedback resistors and ensures precision for low-voltage logic rails. |
| Max Output Current | 600mA continuous - supports core logic, RF transceivers, and sensor subsystems in handheld devices. |
| Input Voltage Range | 2.5V to 5.5V - matches single-cell Li-ion (2.7V–4.2V) and USB-powered systems without pre-regulation. |
| Switching Frequency | 1.5MHz (typ), 210kHz under short-circuit - enables use of sub-3mm surface-mount inductors and minimizes EMI filtering burden. |
| Quiescent Current | 20µA in active mode, <1µA in shutdown - extends battery runtime in standby and sleep modes. |
| Efficiency | Up to 90% at 600mA - achieved via synchronous rectification and low RDS(ON) switches, reducing I²R losses. |
| Thermal Resistance | θJA = 250°C/W - validated for TSOT-23 package; junction temperature remains ≤125°C at 600mA/70°C ambient. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, JEDEC MO-193 compliant. Pin 1 marked with dot; exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable control input | Logic-high (>1.5V) enables regulation; <0.3V forces shutdown (<1µA IQ); must not float-requires pull-up or active drive. |
| GND (Pin 2) | Power and signal reference | Primary return path for VIN, SW, and VOUT currents; must be low-impedance connection to minimize noise and voltage drop. |
| SW (Pin 3) | Switch node | Connects to inductor; carries high di/dt square-wave current-requires short, wide trace and tight CIN placement. |
| VIN (Pin 4) | Main power input | Supplies internal circuitry and switches; requires ≥4.7µF ceramic decoupling placed adjacent to pin. |
| VOUT (Pin 5) | Regulated output / feedback | Delivers 1.2V output; internal resistor divider sets regulation point-no external components needed. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode-reducing BOM count, board area, and conduction losses by ~30% vs. asynchronous designs. |
| Burst Mode operation | Maintains >80% efficiency down to 10mA load by gating switching cycles-critical for battery life in intermittent-use applications. |
| 100% duty cycle capability | Enables dropout as low as 100mV at 600mA-extending usable battery voltage range from 2.7V to 1.3V output. |
| Overtemperature protection | Thermal shutdown activates at ~150°C junction temperature-prevents damage during sustained overload or poor heatsinking. |
| Low-profile TSOT-23 | 1mm height, 2.9mm × 1.6mm footprint-fits space-constrained PCBs in smartphones, wearables, and IoT sensors. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage rail in GSM/UMTS handsets operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary 1.2V synchronous buck regulator delivering up to 600mA with fast transient response to burst-mode transmission demands. Use Value: 90% peak efficiency and 20µA quiescent current directly extend talk time and standby duration beyond competing solutions. |
Use Scenario: Supplying image sensor and ISP core voltage in compact digital cameras with strict height constraints. IC Role / Device Role / Timing Role: Fixed 1.2V step-down converter enabling direct Li-ion battery interface without intermediate LDOs. Use Value: 1mm-profile TSOT-23 allows integration into ultra-thin camera modules where stacked PCBs are impractical. |
| Wireless Modems | Portable Instruments |
Use Scenario: Regulating power for Wi-Fi/BT combo chips in portable hotspot devices with aggressive thermal limits. IC Role / Device Role / Timing Role: High-frequency (1.5MHz) buck converter minimizing inductor size while maintaining stability under dynamic RF load modulation. Use Value: Internal MOSFET RDS(ON) values (0.4Ω/0.45Ω) reduce thermal dissipation, allowing operation at 70°C ambient without derating. |
Use Scenario: Providing clean, regulated 1.2V supply to microcontroller and ADC subsystems in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise synchronous regulator with Burst Mode enabling >100-hour battery life in measurement standby mode. Use Value: 0.5% load regulation and 0.04%/V line regulation ensure consistent ADC reference accuracy across full battery discharge curve. |
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#TRPBF | Same 1.2V fixed output, but 300mA max output current and 0.8V reference (vs. 0.8V + ∆VOVL in LTC3406). | Lower current capability suits ultra-low-power MCU cores; lacks 100% duty cycle mode for extended battery life. | Select when load current ≤300mA and board space is identical-pin-compatible but lower IOUT rating. |
| LTC3403EDD-1.2#TRPBF | 600mA output, 1.5MHz, but in 8-lead DFN package (3mm × 2mm); includes bypass transistor and adjustable VOUT option. | DFN offers better thermal performance (θJA ≈ 120°C/W) but requires different PCB layout and soldering process. | Choose for higher thermal margin or future design flexibility-same electrical specs but non-pin-compatible footprint. |
Compared with LTC3405ES5-1.2#TRPBF and LTC3403EDD-1.2#TRPBF, the LTC3406ES5-1.2#TRPBF uniquely balances 600mA capability, 1mm height, and 100% duty cycle in TSOT-23-making it optimal for space-limited, battery-critical applications where both peak and light-load efficiency matter.
Availability
LTC3406ES5-1.2#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, and wireless modems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC3406ES5-1.2#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 characterization and automotive-grade reliability testing.
The LTC3406 series was designed specifically for portable Li-ion applications demanding ultra-low IQ, small footprint, and seamless transition between Burst Mode and PWM operation-targeting battery-powered consumer and medical instrumentation.
FAQ
What is the maximum continuous output current of the LTC3406ES5-1.2#TRPBF?
The LTC3406ES5-1.2#TRPBF delivers up to 600mA continuous output current at 1.2V with 3V input and 25°C ambient. Derating applies above 70°C ambient or with elevated input voltage due to thermal limits-junction temperature must remain ≤125°C. At 600mA/70°C, measured TJ is 111.4°C using θJA = 250°C/W.
Does the LTC3406ES5-1.2#TRPBF require an external Schottky diode?
No, the LTC3406ES5-1.2#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 and eliminating diode conduction losses and associated BOM cost and board area.
What is the shutdown current specification for the LTC3406ES5-1.2#TRPBF?
The LTC3406ES5-1.2#TRPBF draws less than 1µA supply current in shutdown mode when the RUN pin is pulled below 0.3V. This ultra-low shutdown current preserves battery charge during extended storage or system sleep states-verified across –40°C to 85°C operating temperature range.
Can the LTC3406ES5-1.2#TRPBF operate with a 2.7V input voltage?
Yes, the LTC3406ES5-1.2#TRPBF operates with input voltages as low as 2.5V. At 2.7V input, it sustains 600mA output with >85% efficiency and maintains regulation down to 100mV dropout via 100% duty cycle-ideal for discharging single Li-ion cells from 4.2V to 2.7V.
What package type is used for the LTC3406ES5-1.2#TRPBF?
The LTC3406ES5-1.2#TRPBF uses the 5-lead TSOT-23 (ThinSOT™) package, measuring 2.9mm × 1.6mm × 1.0mm max height. It complies with JEDEC MO-193 and features gull-wing leads for standard reflow assembly-no exposed thermal pad required.
LTC3406ES5-1.2#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):
- 1.2V
- 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#TRPBF FAQ
1.How can I place an order for LTC3406ES5-1.2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRPBF reliable?
The price and inventory of LTC3406ES5-1.2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406ES5-1.2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ES5-1.2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ES5-1.2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ES5-1.2#TRPBF?
LTC3406ES5-1.2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRPBF?
For technical support, including LTC3406ES5-1.2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ES5-1.2#TRPBF requirements.
6.How does Aetrix verify that LTC3406ES5-1.2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ES5-1.2#TRPBF?
All LTC3406ES5-1.2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ES5-1.2#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 LTC3406ES5-1.2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3406ES5-1.2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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