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Analog Devices Inc. LTC3406ES5-1.5#TRMPBF
- Part No.:
- LTC3406ES5-1.5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ES5-1.5#TRMPBF.pdf
- Description:
- IC REG BUCK 1.5V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:466
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Product details
Overview
LTC3406ES5-1.5#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 1.5V output with 96% peak efficiency, 1.5MHz constant-frequency operation, and 20µA quiescent current-designed for single Li-Ion battery-powered portable electronics requiring high light-load efficiency and low dropout.
For engineers reviewing the LTC3406ES5-1.5#TRMPBF datasheet, LTC3406ES5-1.5#TRMPBF pinout, LTC3406ES5-1.5#TRMPBF application, or LTC3406ES5-1.5#TRMPBF equivalent, key selection criteria include its 2.5V–5.5V input range, 100% duty cycle capability, internal P/N-channel MOSFETs (RDS(ON) = 0.4Ω / 0.35Ω), 0.6V feedback reference, and Burst Mode® operation enabling ultra-low IQ in standby.
Technical Context
The LTC3406ES5-1.5#TRMPBF employs a constant-frequency, current-mode control architecture with integrated P-channel main switch and N-channel synchronous rectifier, eliminating external Schottky diode requirements. Its internal 0.6V reference enables precise 1.5V regulation via internal resistor divider, and slope compensation prevents subharmonic oscillation above 40% duty cycle.
Burst Mode® operation reduces supply current to 20µA at light loads by intermittently enabling switching cycles while maintaining regulation; shutdown draws ≤1µA. Short-circuit protection folds oscillator frequency to ~210kHz to limit inductor current, and thermal shutdown activates at ~150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±30mV (1.455V–1.545V) at 100mA load-ensures stable core voltage for low-power microcontrollers and sensors. |
| Input Voltage Range | 2.5V to 5.5V-fully supports single-cell Li-Ion (2.7V–4.2V) and USB-powered systems without external LDO pre-regulation. |
| Switching Frequency | 1.5MHz (typ), 1.2–1.8MHz (min–max)-enables use of compact 2.2µH inductors and ceramic capacitors under 1206 footprint. |
| Max Output Current | 600mA continuous-sufficient for RF transceivers, display drivers, and baseband processors in handheld devices. |
| Quiescent Current | 20µA in active Burst Mode®, ≤1µA in shutdown-extends battery runtime in always-on sensor nodes and sleep-mode peripherals. |
| Efficiency Peak | 96% at mid-load-minimizes thermal rise in sealed enclosures and preserves battery capacity during sustained operation. |
| Duty Cycle Range | 0% to 100%-supports dropout operation down to VIN ≈ VOUT, critical for end-of-discharge battery utilization. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, 0.95mm × 2.9mm footprint-optimized for space-constrained portable PCBs with minimal thermal pad area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable control input | Logic-high (>1.5V) enables regulation; logic-low (<0.3V) forces shutdown with ≤1µA IQ; must not be left floating. |
| GND (Pin 2) | Power and signal reference | Primary return path for VIN, SW, and feedback circuitry-requires low-impedance connection to power plane. |
| SW (Pin 3) | Switch node | Drain connection of internal P- and N-channel MOSFETs-drives external inductor; high dv/dt node requiring tight layout. |
| VIN (Pin 4) | Main input supply | Accepts 2.5V–5.5V input; requires local 2.2µF ceramic decoupling directly to GND (Pin 2) to suppress switching noise. |
| VOUT (Pin 5) | Fixed-output feedback | Internally connected to 1.5V output divider-no external resistors needed; used for remote sensing in precision applications. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing BOM count and improving efficiency by 5–10% vs. asynchronous designs. |
| Burst Mode® operation | Maintains regulation at light loads while cutting IQ to 20µA-critical for >1-week battery life in IoT endpoints. |
| 100% duty cycle capability | Extends usable battery range down to ~1.6V input when regulating 1.5V output-delays system brownout. |
| Internal 0.6V reference | Enables accurate fixed 1.5V output without external components-reduces layout sensitivity and improves production yield. |
| Thermal shutdown | Disables both switches at ~150°C junction temperature-prevents permanent damage during overload or poor heatsinking. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core rail in GSM/UMTS handsets operating from single Li-Ion cell. IC Role / Device Role / Timing Role: Primary 1.5V synchronous buck regulator delivering up to 600mA with fast transient response to burst-mode RF transmission. Use Value: 96% peak efficiency and 20µA Burst Mode® IQ extend talk time by >12% versus legacy PWM-only regulators. | Use Scenario: Supplying image sensor analog front-end and ISP core in compact digital cameras. IC Role / Device Role / Timing Role: Fixed 1.5V point-of-load regulator with low-noise operation and minimal EMI due to 1.5MHz constant frequency. Use Value: TSOT-23-5 footprint and 1mm height enable integration into ultra-thin camera modules without thermal derating. |
| Wireless Modems | Portable Instruments |
Use Scenario: Regulating 1.5V supply for Wi-Fi/BT SoC in battery-powered home gateways and mesh nodes. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter supporting intermittent high-current bursts (e.g., packet transmission) with rapid recovery. Use Value: Current-mode control ensures <50µs load transient recovery and <20mV undershoot-preserving data integrity during RF activity. | Use Scenario: Powering precision ADCs, op-amps, and microcontrollers in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise, tightly regulated 1.5V source with <±30mV output tolerance across –40°C to +85°C. Use Value: Internal 0.6V reference and <0.4%/V line regulation ensure stable reference for 12-bit+ 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 1.5V output, 1.8MHz switching, 2.05V–6.5V input, 400mA max, 17µA IQ | Lower max current and higher minimum input limit-unsuitable for deep-discharge Li-Ion (≤2.5V). | Select if higher switching frequency and lower IQ are prioritized over 600mA capability and 2.5V start-up. |
| RT8059GJ6 | Fixed 1.5V output, 1.5MHz, 2.5V–5.5V input, 600mA, 22µA IQ, no Burst Mode® | Uses PWM-only light-load control-lower efficiency below 10mA than LTC3406ES5-1.5#TRMPBF's Burst Mode®. | Select if cost sensitivity outweighs 3–5% light-load efficiency gain and thermal performance is less constrained. |
Compared with TPS62231DRYR and RT8059GJ6, the LTC3406ES5-1.5#TRMPBF uniquely combines 600mA delivery from 2.5V input, 96% peak efficiency, and 20µA Burst Mode® IQ-making it optimal for long-life, single-cell Li-Ion systems where both peak and standby power matter.
Availability
LTC3406ES5-1.5#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 guaranteed traceable sourcing.
Supply support for LTC3406ES5-1.5#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 delivers highly integrated, high-efficiency DC/DC converters optimized for battery-powered portable electronics-emphasizing ultra-low quiescent current, small footprint, and robust transient performance.
FAQ
What is the maximum output current capability of the LTC3406ES5-1.5#TRMPBF?
The LTC3406ES5-1.5#TRMPBF delivers up to 600mA continuous output current at 1.5V under typical conditions (TA = 25°C, VIN = 3.6V). Derating applies at elevated ambient temperatures or low input voltages-e.g., ~450mA at 85°C ambient with VIN = 2.7V due to thermal limits and increased RDS(ON).
Does the LTC3406ES5-1.5#TRMPBF require an external Schottky diode?
No, the LTC3406ES5-1.5#TRMPBF 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 conduction losses associated with external diodes.
What is the purpose of the RUN pin on the LTC3406ES5-1.5#TRMPBF?
On the LTC3406ES5-1.5#TRMPBF, the RUN pin (Pin 1) controls device enable/disable: applying >1.5V enables regulation, while <0.3V places the IC in shutdown mode drawing ≤1µA. Leaving RUN floating is prohibited-it must be actively driven or pulled to GND/VIN via a resistor.
Can the LTC3406ES5-1.5#TRMPBF operate with input voltage below 2.5V?
No-the absolute minimum input voltage for the LTC3406ES5-1.5#TRMPBF is 2.5V per Absolute Maximum Ratings. Operation below this risks undefined behavior or failure to regulate; the device is specified for 2.5V–5.5V input and designed for single Li-Ion (2.7V–4.2V) compatibility.
How does Burst Mode® operation improve efficiency in the LTC3406ES5-1.5#TRMPBF?
Burst Mode® operation in the LTC3406ES5-1.5#TRMPBF reduces quiescent current to 20µA at light loads by disabling switching until output voltage droop triggers a short burst of cycles. This avoids continuous switching losses, raising efficiency from ~65% (PWM-only) to >85% at 1mA load-extending battery life in standby.
LTC3406ES5-1.5#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):
- 1.5V
- 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
LTC3406ES5-1.5#TRMPBF FAQ
1.How can I place an order for LTC3406ES5-1.5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ES5-1.5#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 LTC3406ES5-1.5#TRMPBF reliable?
The price and inventory of LTC3406ES5-1.5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406ES5-1.5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ES5-1.5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ES5-1.5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ES5-1.5#TRMPBF?
LTC3406ES5-1.5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ES5-1.5#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 LTC3406ES5-1.5#TRMPBF?
For technical support, including LTC3406ES5-1.5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ES5-1.5#TRMPBF requirements.
6.How does Aetrix verify that LTC3406ES5-1.5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ES5-1.5#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 LTC3406ES5-1.5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ES5-1.5#TRMPBF?
All LTC3406ES5-1.5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ES5-1.5#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 LTC3406ES5-1.5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406ES5-1.5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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