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Analog Devices Inc. LTC3406ES5#TRPBF
- Part No.:
- LTC3406ES5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ES5#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,350
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Product details
Overview
LTC3406ES5#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 output current with 96% peak efficiency, 1.5MHz fixed switching frequency, and 2.5V–5.5V input range. It integrates P-channel and N-channel MOSFETs, requires no external Schottky diode, and supports low-dropout operation via 100% duty cycle - ideal for single Li-Ion battery-powered portable electronics.
For engineers reviewing the LTC3406ES5#TRPBF datasheet, LTC3406ES5#TRPBF pinout, LTC3406ES5#TRPBF application, or LTC3406ES5#TRPBF equivalent, key selection criteria include its 20µA operating quiescent current, 0.6V feedback reference enabling sub-1.5V outputs, Burst Mode® operation for light-load efficiency, thermal shutdown protection, and compatibility with ceramic input/output capacitors in space-constrained designs.
Technical Context
The LTC3406ES5#TRPBF employs constant-frequency current-mode control with internal slope compensation, enabling stable operation across 0–100% duty cycle. Its dual-MOSFET architecture (0.4Ω P-FET RDS(ON), 0.35Ω N-FET RDS(ON)) eliminates external diode losses and supports high-efficiency regulation down to 1.5V output (fixed version).
Burst Mode® operation reduces quiescent current to 20µA at light loads by intermittently enabling switching cycles, while RUN pin control (0.3V–1.5V threshold) enables precise enable/disable sequencing. Short-circuit protection includes oscillator foldback to 210kHz, and overtemperature shutdown activates at ~150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports full discharge curve of single Li-Ion cell (2.7V–4.2V) without dropout interruption. |
| Output Current | 600mA continuous - sufficient for core logic rails in cellular handsets and digital cameras. |
| Switching Frequency | 1.5MHz (typ) - enables use of compact 2.2µH inductors and low-ESR ceramic capacitors. |
| Feedback Reference | 0.6V ±15mV - allows precise output programming from 0.6V to 5.5V using external resistor divider. |
| Quiescent Current | 20µA in active mode - extends battery runtime in standby states of portable instrumentation. |
| Shutdown Current | ≤1µA - ensures negligible drain during system sleep or power-off modes. |
| Efficiency Peak | 96% - minimizes thermal stress and maximizes energy utilization in thermally constrained enclosures. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, RoHS-compliant, thermal resistance θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/Shutdown Control Input | Logic-level input: ≥1.5V enables regulation; ≤0.3V forces shutdown with ≤1µA supply current. |
| GND (Pin 2) | Power Ground Reference | Primary return path for input capacitor, inductor, and internal switch currents - must be low-impedance. |
| SW (Pin 3) | Switch Node | Connection point for external inductor; carries high dv/dt and pulsed current - critical for EMI and layout integrity. |
| VIN (Pin 4) | Main Power Input | Supplies internal circuitry and switches; requires local 2.2µF ceramic decoupling directly to GND (Pin 2). |
| VOUT (Pin 5) | Fixed Output Feedback | Internally connected to resistive divider for 1.8V output - no external resistors needed; used for remote sensing in fixed versions. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated P- and N-channel MOSFETs eliminate external Schottky diode, reducing BOM count and improving efficiency above 200mA. |
| Burst Mode® Operation | Reduces quiescent current to 20µA at light loads while maintaining tight output regulation - essential for battery longevity in intermittent-use devices. |
| 100% Duty Cycle Capability | Enables dropout operation down to VIN ≈ VOUT, extending usable battery life in deep-discharge conditions without output collapse. |
| Low-Noise 1.5MHz Switching | Places switching harmonics beyond sensitive RF bands (e.g., GSM, Bluetooth), easing EMI filtering requirements in handheld radios. |
| Thermal Shutdown Protection | Disables both switches when junction temperature exceeds ~150°C - prevents permanent damage during overload or poor heatsinking. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage from single Li-Ion cell (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary 1.8V/1.5V synchronous buck regulator supplying CPU I/O and memory interface rails. Use Value: 96% efficiency and 20µA quiescent current maximize talk time and standby duration without thermal throttling. |
Use Scenario: Supplying image sensor analog front-end and ISP core logic in compact camera modules. IC Role / Device Role / Timing Role: Low-noise, fast-transient 1.8V regulator supporting burst-mode image capture sequences. Use Value: 1.5MHz switching avoids interference with sensor clock domains; 100% duty cycle sustains output during battery sag. |
| Wireless Modems | Portable Instruments |
Use Scenario: Regulating 1.5V supply for Wi-Fi/BT SoC in USB-powered dongles or embedded gateways. IC Role / Device Role / Timing Role: High-efficiency step-down converter interfacing with 3.3V USB VBUS or Li-Ion battery input. Use Value: TSOT-23-5 footprint minimizes PCB area; Burst Mode® maintains >85% efficiency at 1–10mA idle current. |
Use Scenario: Providing stable 1.8V rail for microcontroller, ADC, and display driver in handheld test equipment. IC Role / Device Role / Timing Role: Precision-regulated power source with <±1% load line regulation and low output ripple. Use Value: 0.6V reference and tight VFB tolerance (±20mV) ensure accurate output setting across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz switching frequency, 0.65V reference, 400mA output, 1.8V fixed output; smaller 2mm × 2mm WSON package. | Higher frequency enables smaller passives but increases gate-drive losses at >300mA; lower max current limits use in higher-power peripherals. | Select when board space is critical and load current stays below 400mA; verify thermal performance under 100% duty cycle. |
| MAX17222ETA+T | 1.2MHz frequency, 0.6V reference, 500mA output, 1.8V fixed output; integrated soft-start, lower 15µA quiescent current in shutdown. | Lower max output current and slightly reduced efficiency (94% peak) constrain use in high-transient camera or modem loads. | Prefer for ultra-low-power sensor nodes where shutdown IQ <0.5µA is mandatory; confirm SW node ringing behavior with ceramic caps. |
Compared with TPS62231DRVR and MAX17222ETA+T, the LTC3406ES5#TRPBF offers higher output current (600mA), superior light-load efficiency via Burst Mode®, and proven robustness in Li-Ion dropout conditions - making it optimal for cost-sensitive, thermally constrained portable systems requiring field-proven reliability.
Availability
LTC3406ES5#TRPBF 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 manufacturability and consistent parametric performance.
Supply support for LTC3406ES5#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 full technical and manufacturing continuity for legacy Linear power products.
The LTC3406 series was designed specifically for high-efficiency, low-quiescent-current DC/DC conversion in battery-powered portable electronics - emphasizing small footprint, wide input range, and seamless transition between active and ultra-low-power modes.
FAQ
What is the function of the RUN pin on the LTC3406ES5#TRPBF?
The RUN pin (Pin 1) controls device enable/disable state. Applying ≥1.5V enables regulation; ≤0.3V forces shutdown with ≤1µA supply current. The LTC3406ES5#TRPBF must not be left floating - tie to VIN through a pull-up or drive actively. This pin supports power sequencing in multi-rail systems and enables system-level wake/sleep control without external logic.
Does the LTC3406ES5#TRPBF require an external Schottky diode?
No. The LTC3406ES5#TRPBF integrates both P-channel and N-channel MOSFETs in a synchronous buck topology, eliminating the need for an external Schottky diode. This reduces conduction losses, improves efficiency (up to 96%), and simplifies PCB layout. The internal synchronous rectification also enables 100% duty cycle operation for low-dropout performance.
What output voltage does the LTC3406ES5#TRPBF deliver?
The LTC3406ES5#TRPBF is the fixed 1.8V output variant. Its VOUT pin (Pin 5) connects internally to a precision resistive divider referenced to the 0.6V bandgap, delivering 1.800V ±45mV at 100mA load across –40°C to +85°C. No external feedback resistors are required - simplifying design and improving accuracy versus adjustable versions.
Can the LTC3406ES5#TRPBF operate from a 2.5V input?
Yes. The LTC3406ES5#TRPBF supports input voltages from 2.5V to 5.5V, making it compatible with deeply discharged Li-Ion cells (down to ~2.7V typical). At 2.5V input, maximum output current is reduced due to increased conduction losses and duty-cycle limitations - consult Figure 2 in the datasheet for derated current vs. input voltage curves.
How does Burst Mode® operation improve efficiency in the LTC3406ES5#TRPBF?
Burst Mode® reduces quiescent current to 20µA at light loads by disabling switching until output voltage droop triggers a regulated burst of cycles. Each burst delivers just enough energy to restore regulation, then returns to sleep. This preserves >85% efficiency at 1mA load - critical for battery life in standby or sensor-monitoring applications using the LTC3406ES5#TRPBF.
LTC3406ES5#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
LTC3406ES5#TRPBF FAQ
1.How can I place an order for LTC3406ES5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ES5#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#TRPBF reliable?
The price and inventory of LTC3406ES5#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ES5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ES5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ES5#TRPBF?
LTC3406ES5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ES5#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#TRPBF?
For technical support, including LTC3406ES5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ES5#TRPBF requirements.
6.How does Aetrix verify that LTC3406ES5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ES5#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ES5#TRPBF?
All LTC3406ES5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ES5#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3406ES5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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