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Analog Devices Inc. LTC3406ES5#TRMPBF
- Part No.:
- LTC3406ES5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ES5#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:953
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Product details
Overview
LTC3406ES5#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency monolithic synchronous buck regulator in a 5-lead TSOT-23 package, delivering up to 600mA output current with 1.5MHz fixed switching frequency, 2.5V–5.5V input range, and 1.8V fixed output voltage. It operates in Burst Mode® for ultra-low quiescent current (20µA active, ≤1µA shutdown) and supports 100% duty cycle for low-dropout operation in single Li-Ion battery-powered systems.
For engineers reviewing the LTC3406ES5#TRMPBF datasheet, LTC3406ES5#TRMPBF pinout, LTC3406ES5#TRMPBF application, or LTC3406ES5#TRMPBF equivalent, key selection criteria include its fixed 1.8V output, integrated P/N-channel MOSFETs, 0.6V feedback reference, thermal shutdown, and compatibility with ceramic input/output capacitors in space-constrained portable designs.
Technical Context
The LTC3406ES5#TRMPBF implements a constant-frequency, current-mode control architecture with internal slope compensation to prevent subharmonic oscillation at high duty cycles. Its dual-MOSFET synchronous rectification eliminates external Schottky diode requirements and improves efficiency across load range.
Burst Mode® operation dynamically disables power switches during light loads, reducing supply current to 20µA while maintaining regulation; oscillator frequency folds back to ~210kHz under short-circuit conditions for safe current limiting. The device integrates overtemperature protection and uses an internal 0.6V reference for precise output voltage setting via external resistor divider (adjustable version) or internal divider (fixed-output variants).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.7% (1.746V–1.854V) at 100mA load - ensures stable core logic supply for low-voltage microcontrollers and baseband ICs. |
| Input Voltage Range | 2.5V to 5.5V - fully supports single-cell Li-ion battery discharge profile (2.7V–4.2V) without external LDO pre-regulation. |
| Max Output Current | 600mA continuous - sufficient for RF transceivers, digital signal processors, and memory subsystems in handheld devices. |
| Switching Frequency | 1.5MHz (typ), 1.2–1.8MHz (min–max) - enables use of compact 2.2µH inductors and low-ESR ceramic capacitors to minimize PCB area. |
| Quiescent Current | 20µA in active Burst Mode®, ≤1µA in shutdown - extends battery runtime in standby and sleep modes of portable electronics. |
| Feedback Reference | 0.6V ±2.5% (0.585V–0.615V) over –40°C to +85°C - enables accurate low-output-voltage regulation with minimal resistor tolerance impact. |
| Thermal Shutdown | Activates at TJ ≈ 150°C - protects die during sustained high-power operation in thermally constrained enclosures. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm height, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/Shutdown Control Input | Logic-high (>1.5V) enables regulation; logic-low (<0.3V) forces shutdown with ≤1µA supply current - allows system-level power sequencing and wake-up control. |
| GND (Pin 2) | Power and Signal Ground Reference | Common return path for input capacitor, output capacitor, and internal switch current - must be low-impedance connection to minimize noise coupling into feedback node. |
| SW (Pin 3) | Switch Node Connection | Drain connection of internal P-channel (high-side) and N-channel (low-side) MOSFETs - routes high di/dt switching current to external inductor; requires tight layout to reduce EMI. |
| VIN (Pin 4) | Main Power Input | Supplies gate drive and bias circuitry; requires local 2.2µF+ ceramic decoupling directly between VIN and GND to suppress high-frequency ripple and ensure stable startup. |
| VOUT (Pin 5) | Fixed-Output Feedback Sense | Internally connected to midpoint of precision resistive divider - provides regulated 1.8V output without external components; not adjustable on this variant. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated P- and N-channel MOSFETs eliminate external Schottky diode, reducing conduction losses and board area - achieves up to 96% peak efficiency at 600mA. |
| Burst Mode® Operation | Reduces quiescent current to 20µA at light loads while maintaining output regulation - critical for >100-hour standby time in battery-powered instrumentation and modems. |
| 100% Duty Cycle Capability | Enables dropout operation down to VIN = VOUT + ILOAD × RDS(ON) - sustains 1.8V output even as Li-ion battery discharges below 2.5V, maximizing usable battery capacity. |
| Current-Mode Control with Slope Compensation | Ensures stable loop response across full duty cycle range (including >40%), preventing subharmonic oscillation without sacrificing peak inductor current capability. |
| Thermal Protection | Internal junction temperature sensing disables both power switches when TJ reaches ~150°C - prevents permanent damage during overload or poor heatsinking conditions. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver from single Li-ion cell during active call and idle modes. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator providing stable 1.8V core supply with fast transient response to bursty processor loads. Use Value: Burst Mode® extends talk time by minimizing no-load current; 1.5MHz switching allows miniaturized passive components for slim form factor. | Use Scenario: Supplying image sensor interface and DSP core in compact digital camera with battery life optimization. IC Role / Device Role / Timing Role: Fixed-output synchronous buck converter delivering regulated 1.8V at up to 600mA during image capture and playback sequences. Use Value: High efficiency (>90% at 300mA) reduces thermal load on plastic housing; 100% duty cycle maintains output during battery voltage sag during flash LED activation. |
| Wireless Modems | Portable Instruments |
Use Scenario: Generating 1.8V supply for Wi-Fi/Bluetooth SoC in always-on IoT gateway with multi-day battery operation. IC Role / Device Role / Timing Role: Low-quiescent-current buck regulator enabling deep-sleep current <1µA while retaining fast wake-up capability. Use Value: ≤1µA shutdown current minimizes self-discharge; small TSOT-23 footprint saves space on dense modem PCBs alongside RF front-end components. | Use Scenario: Powering microcontroller, ADC, and display driver in handheld test equipment operating from rechargeable Li-ion pack. IC Role / Device Role / Timing Role: High-PSRR, low-noise DC-DC converter supplying clean 1.8V rail for precision analog front-end and digital logic. Use Value: Ceramic capacitor compatibility ensures low output ripple (<10mVpp) without ESR-dependent stability concerns; thermal shutdown prevents field failures during extended bench use. |
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 switching, 600mA rating, 17µA quiescent current; uses different pinout (SW/GND/VIN/EN/VFB) and requires external feedback for adjustment. | Optimized for higher-frequency operation and slightly lower IQ; lacks 100% duty cycle support - less suitable for deep battery discharge scenarios. | Select if board layout allows re-routing for DRY package and system prioritizes 1.8MHz switching over dropout performance. |
| RT8059GJ6 | Fixed 1.8V output, 1.5MHz switching, 600mA rating, 25µA quiescent current; includes soft-start and power-good flag; same TSOT-23-5 pinout but different pin assignment (VIN/GND/SW/EN/VFB). | Offers PG signal for system monitoring and controlled soft-start to limit inrush; no Burst Mode® - efficiency drops faster below 10mA than LTC3406ES5#TRMPBF. | Select when power-good indication or inrush control is required and 25µA IQ is acceptable for standby duration targets. |
Compared with TPS62231DRYR and RT8059GJ6, the LTC3406ES5#TRMPBF delivers superior light-load efficiency via Burst Mode®, guaranteed 100% duty cycle for extended battery life, and proven robustness in portable Li-ion applications - making it optimal where ultra-low IQ and dropout resilience are primary design constraints.
Availability
LTC3406ES5#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, wireless modems, and portable instruments requiring stable component supply with long-term lifecycle support.
Supply support for LTC3406ES5#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 high-efficiency, low-quiescent-current DC-DC conversion in battery-powered portable electronics - emphasizing small size, wide input range, and intelligent power-saving modes like Burst Mode®.
FAQ
What is the output voltage of the LTC3406ES5#TRMPBF?
The LTC3406ES5#TRMPBF is a fixed-output variant delivering 1.8V ±2.7% (1.746V–1.854V) at 100mA load across –40°C to +85°C ambient temperature. This value is set internally via a precision resistive divider; no external components are required to configure the output voltage of the LTC3406ES5#TRMPBF.
Does the LTC3406ES5#TRMPBF require an external Schottky diode?
No, the LTC3406ES5#TRMPBF does not require an external Schottky diode. It integrates both P-channel (high-side) and N-channel (low-side) synchronous MOSFETs, enabling full synchronous rectification. This architecture eliminates conduction losses associated with external diodes and contributes to the LTC3406ES5#TRMPBF's up to 96% peak efficiency.
What is the minimum input voltage the LTC3406ES5#TRMPBF can operate at?
The LTC3406ES5#TRMPBF operates down to 2.5V input voltage per absolute maximum ratings, and functions reliably across its full 2.5V–5.5V input range. At low input voltages near 2.5V, output current capability decreases due to reduced headroom; for example, at VIN = 2.7V and VOUT = 1.8V, maximum continuous output remains 600mA but thermal limits may apply depending on PCB layout and ambient conditions - verified in the LTC3406ES5#TRMPBF datasheet Figure 2.
How does Burst Mode® operation improve battery life in the LTC3406ES5#TRMPBF?
Burst Mode® operation in the LTC3406ES5#TRMPBF reduces quiescent current to 20µA during light loads by intermittently enabling the power switches only when output voltage droop exceeds regulation threshold. This significantly extends battery runtime in standby or idle states - for instance, in a wireless modem using LTC3406ES5#TRMPBF, 20µA IQ enables multi-week operation on a single coin-cell-equivalent charge without compromising fast wake-up response.
Is the LTC3406ES5#TRMPBF pin-compatible with other variants in the LTC3406 family?
Yes, the LTC3406ES5#TRMPBF shares the identical 5-lead TSOT-23 (S5) package and pinout with LTC3406ES5-1.5#TRMPBF and adjustable LTC3406ES5#TRMPBF variants. Pin assignments (RUN, GND, SW, VIN, VOUT/VFB) are consistent across all S5-packaged LTC3406 versions, enabling drop-in replacement in layouts designed for the same footprint - though output voltage and feedback configuration differ per variant.
LTC3406ES5#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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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#TRMPBF FAQ
1.How can I place an order for LTC3406ES5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ES5#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#TRMPBF reliable?
The price and inventory of LTC3406ES5#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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ES5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ES5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ES5#TRMPBF?
LTC3406ES5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ES5#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#TRMPBF?
For technical support, including LTC3406ES5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ES5#TRMPBF requirements.
6.How does Aetrix verify that LTC3406ES5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ES5#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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ES5#TRMPBF?
All LTC3406ES5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ES5#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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406ES5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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