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Analog Devices Inc. LTC3406BES5#TRPBF
- Part No.:
- LTC3406BES5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406BES5#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC3406BES5#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency monolithic synchronous buck regulator using constant-frequency current-mode control. It delivers up to 600mA output current at 3V input, operates from 2.5V to 5.5V, features 1.5MHz switching frequency, 0.6V feedback reference, and 100% duty-cycle low-dropout operation - ideal for single Li-Ion battery-powered portable electronics.
For engineers reviewing the LTC3406BES5#TRPBF datasheet, LTC3406BES5#TRPBF pinout, LTC3406BES5#TRPBF application, or LTC3406BES5#TRPBF equivalent, key selection criteria include input voltage range (2.5–5.5V), fixed 1.8V output, thermal performance in TSOT-23-5, shutdown current (<1µA), and synchronous FET RDS(ON) (0.4Ω P-ch / 0.45Ω N-ch).
Technical Context
The LTC3406BES5#TRPBF implements a constant-frequency (1.5MHz nominal), current-mode step-down architecture with internal P-channel main and N-channel synchronous switches. Its error amplifier compares VFB against a precise 0.6V reference, modulating peak inductor current via slope-compensated PWM to maintain regulation across line and load transients.
It supports pulse-skipping mode at light loads to sustain regulation while minimizing quiescent current (300µA no-load, <1µA shutdown). Overtemperature protection disables both switches above ~150°C junction temperature, and output overvoltage lockout triggers at +7.8% deviation from nominal output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.7% (1.746V–1.854V) - ensures stable core logic supply for low-voltage microcontrollers and baseband ICs. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V) and regulated 3.3V/5V rails without external LDO pre-regulation. |
| Max Output Current | 600mA continuous - sufficient for RF transceivers, DSPs, and display drivers in handheld devices. |
| Switching Frequency | 1.5MHz (±20%) - enables use of compact 2.2µH inductors and ceramic capacitors, reducing board area and EMI filter complexity. |
| Quiescent Current | 300µA typical (no load), <1µA in shutdown - extends battery runtime in standby and sleep modes. |
| Efficiency | Up to 96% at 600mA/VIN=3.6V - minimizes thermal stress and power loss in thermally constrained thin-profile enclosures. |
| Feedback Reference | 0.6V ±2.5% (–40°C to 85°C) - allows precise low-output-voltage regulation and supports remote sensing via resistive divider. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, θJA = 250°C/W. RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable control input | Logic-high (>1.5V) enables regulation; <0.3V forces shutdown with <1µA supply draw - used for system-level power sequencing and wake-up control. |
| GND (Pin 2) | Power and signal reference | Primary return path for VIN, SW, and feedback circuitry - must be connected to low-impedance ground plane to minimize noise coupling and ensure stability. |
| SW (Pin 3) | Switch node | Connects to inductor and internal P/N MOSFET drains - carries high di/dt square-wave current; requires short, wide trace to reduce EMI and voltage ringing. |
| VIN (Pin 4) | Main power input | Supplies internal bias and switch drivers - requires local 4.7µF ceramic decoupling directly between VIN and GND to suppress high-frequency ripple. |
| VOUT (Pin 5) | Fixed-output feedback | Internally connected to 1.8V divider output - provides regulated 1.8V reference point; used for remote sensing or as direct output connection in non-adjustable configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces conduction losses and improves efficiency by >5% vs asynchronous designs at medium-to-heavy loads. |
| 100% duty cycle operation | Enables dropout mode down to VIN ≈ VOUT + ILOAD × RDS(ON) - extends usable battery life in deep discharge conditions (e.g., Li-ion down to 2.7V). |
| Pulse-skipping mode | Maintains regulation at light loads without burst-mode noise - achieves <300µA quiescent current while preserving low output ripple for noise-sensitive analog circuits. |
| Internal slope compensation | Prevents subharmonic oscillation at >40% duty cycle without reducing peak inductor current - ensures stable operation across full input/output range without external components. |
| Overvoltage lockout | Triggers at +7.8% over nominal output - protects downstream 1.8V logic from transient overvoltage during startup or load dump events. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver from single Li-ion cell during active call or data transmission. IC Role / Device Role / Timing Role: Primary 1.8V system rail regulator delivering up to 600mA with fast load transient response. Use Value: 96% peak efficiency and 300µA quiescent current maximize talk time and standby duration; 1.5MHz switching avoids AM radio band interference. | Use Scenario: Supplying image sensor interface and JPEG encoder ASIC during photo capture burst mode. IC Role / Device Role / Timing Role: High-current, low-noise 1.8V supply with pulse-skipping mode for idle periods between shots. Use Value: Low output ripple (<10mVpp) prevents image noise; thermal resistance (250°C/W) ensures reliability in compact camera modules. |
| Wireless Modems | Portable Instruments |
Use Scenario: Regulating 1.8V core voltage for Wi-Fi/BT SoC in battery-powered IoT gateway. IC Role / Device Role / Timing Role: Always-on system regulator supporting rapid wake-from-sleep transitions. Use Value: RUN pin enables hardware-controlled power gating; <1µA shutdown current meets multi-year battery life requirements. | Use Scenario: Providing precision 1.8V supply to ADC reference buffer and microcontroller in handheld multimeter. IC Role / Device Role / Timing Role: Low-drift, low-noise power source for analog front-end and digital logic. Use Value: 0.6V reference tolerance (±2.5%) and line regulation (0.04%/V) ensure consistent ADC accuracy across battery voltage range. |
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, 0.6V ref, but lower max current (400mA) and higher quiescent current (17µA in PWM mode). | Less suitable for 600mA peak loads; better for ultra-low-noise apps due to integrated soft-start and tighter VOUT tolerance (±1%). | Select if board space is critical (1.5mm × 1.5mm DSBGA) and load current ≤400mA. |
| RT8059GJ6 | Fixed 1.8V, 1.5MHz, 600mA, but uses external compensation and lacks pulse-skipping mode - higher light-load IQ (~25µA). | Requires additional RC network for loop stability; less optimal for battery standby but offers adjustable soft-start. | Select if design requires programmable soft-start or compatibility with existing RT series layout footprints. |
Compared with TPS62231DRYR and RT8059GJ6, the LTC3406BES5#TRPBF delivers superior light-load efficiency (<1µA shutdown, 300µA no-load) and integrated slope compensation - making it preferred for long-life Li-ion portable systems where thermal headroom and battery longevity are critical.
Availability
LTC3406BES5#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital still cameras, portable instruments, and MP3 players requiring stable component supply and long-term production continuity.
Supply support for LTC3406BES5#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 LTC3406B family targets portable, battery-powered applications demanding high efficiency, small footprint, and robust transient response - specifically engineered for single-cell Li-ion systems operating down to 2.5V input.
FAQ
What is the maximum output current capability of the LTC3406BES5#TRPBF under typical conditions?
The LTC3406BES5#TRPBF delivers up to 600mA continuous output current when VIN ≥ 3V and ambient temperature is ≤85°C. At lower input voltages (e.g., 2.7V), maximum current drops to ~500mA due to increased RDS(ON) and thermal limits. Derating curves in the datasheet confirm this behavior across the 2.5–5.5V input range.
Does the LTC3406BES5#TRPBF require an external Schottky diode?
No, the LTC3406BES5#TRPBF does not require an external Schottky diode. It integrates both a P-channel main switch and an N-channel synchronous rectifier, eliminating conduction losses and heat generation associated with external diodes - a key factor enabling its 96% peak efficiency.
What is the function of the RUN pin on the LTC3406BES5#TRPBF?
The RUN pin (Pin 1) controls device enable/disable: driving it above 1.5V enables regulation; pulling it below 0.3V places LTC3406BES5#TRPBF in shutdown mode, reducing supply current to <1µA. Leaving RUN floating is prohibited - it must be actively driven or pulled to GND via resistor for predictable operation.
Can the LTC3406BES5#TRPBF operate with a 2.5V input supply?
Yes, the LTC3406BES5#TRPBF is fully specified to operate from 2.5V to 5.5V input. At 2.5V, it sustains 1.8V output in 100% duty cycle mode, though max load current is reduced (~350mA) due to higher P-FET RDS(ON) and thermal constraints - verified in Figure 2 of the datasheet.
What package type and thermal characteristics does the LTC3406BES5#TRPBF use?
The LTC3406BES5#TRPBF uses a 5-lead TSOT-23 (S5) package with 1mm height. Its thermal resistance is θJA = 250°C/W and θJC = 90°C/W. At 600mA and 2.7V input, junction temperature remains below 125°C in typical PCB layouts - confirmed by thermal analysis in Application Note section.
LTC3406BES5#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:
- 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
LTC3406BES5#TRPBF FAQ
1.How can I place an order for LTC3406BES5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406BES5#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 LTC3406BES5#TRPBF reliable?
The price and inventory of LTC3406BES5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406BES5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3406BES5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406BES5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406BES5#TRPBF?
LTC3406BES5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406BES5#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 LTC3406BES5#TRPBF?
For technical support, including LTC3406BES5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406BES5#TRPBF requirements.
6.How does Aetrix verify that LTC3406BES5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406BES5#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 LTC3406BES5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3406BES5#TRPBF?
All LTC3406BES5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406BES5#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 LTC3406BES5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3406BES5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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