My Inquiry
My Account
Analog Devices Inc. LTC3406BES5-1.2#TRMPBF
- Part No.:
- LTC3406BES5-1.2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406BES5-1.2#TRMPBF.pdf
- Description:
- IC REG BUCK 1.2V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:878
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3406BES5-1.2 from Analog Devices (formerly Linear Technology) is a high-efficiency, monolithic synchronous step-down DC/DC converter in a 5-lead TSOT-23 package. It delivers up to 600mA output current with 1.2V fixed output, operates from 2.5V to 5.5V input, achieves up to 96% efficiency, and runs at a constant 1.5MHz switching frequency-optimized for single Li-Ion battery-powered portable electronics.
For engineers reviewing the LTC3406BES5-1.2 datasheet, LTC3406BES5-1.2 pinout, LTC3406BES5-1.2 application, or LTC3406BES5-1.2 equivalent, key selection criteria include its 1.2V fixed output, 600mA load capability, 300µA quiescent current, 1.5MHz internal oscillator, and integrated P/N-channel MOSFETs eliminating external Schottky diode requirements.
Technical Context
The LTC3406BES5-1.2 employs a constant-frequency, current-mode control architecture with internal P-channel main switch (RDS(ON) = 0.4–0.5Ω) and N-channel synchronous rectifier (RDS(ON) = 0.35–0.45Ω). Its RUN pin enables/disables operation with 0.3V–1.5V threshold, and overtemperature protection activates above ~150°C junction temperature.
It supports pulse-skipping mode at light loads to maintain regulation while minimizing output ripple, and features 100% duty-cycle capability for ultra-low dropout operation. Short-circuit protection reduces oscillator frequency to ~210kHz to limit inductor current runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±3% (1.164V–1.236V), internally trimmed for precision without external feedback resistors. |
| Max Output Current | 600mA continuous, supported by internal switches rated for 800mA DC and 1.3A peak sink/source. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (2.7V–4.2V) and regulated 3.3V/5V rails. |
| Switching Frequency | 1.5MHz typical (1.2–1.8MHz range), enabling compact 2.2µH inductors and low-profile ceramic capacitors. |
| Quiescent Current | 300µA at no load; drops to <1µA in shutdown - critical for battery runtime in standby modes. |
| Efficiency Peak | Up to 96% at 600mA, VIN = 3.6V - achieved via synchronous rectification and low RDS(ON) FETs. |
| Thermal Limit | Junction temperature limited to 125°C; overtemperature protection disables switching above ~150°C. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, JEDEC MO-193 compliant, θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/disable control input | Logic-high (>1.5V) enables regulator; logic-low (<0.3V) forces shutdown with <1µA supply current - must not be left floating. |
| GND (Pin 2) | Power and signal reference ground | Common return path for VIN, SW, VOUT, and internal circuitry - requires low-impedance PCB connection to minimize noise and thermal rise. |
| SW (Pin 3) | Switch node | Connection point for external inductor; carries high dv/dt square-wave voltage and high di/dt current - demands short, wide copper routing. |
| VIN (Pin 4) | Main power input | Supplies internal circuitry and power switches; requires local 4.7µF ceramic decoupling to GND (Pin 2) to suppress high-frequency transients. |
| VOUT (Pin 5) | Regulated output / feedback sense | Delivers 1.2V output; internal resistive divider (60kΩ/120kΩ) compares output to 0.8V reference - no external resistor network needed. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and board area - improves efficiency by ~5–10% vs. asynchronous designs. |
| 100% duty-cycle operation | Enables dropout as low as VOUT – VDS(on), extending usable battery life down to ~1.3V input in Li-ion systems. |
| Pulse-skipping mode | Maintains tight output regulation at light loads (e.g., 2mA standby) while minimizing switching losses and output ripple. |
| Overtemperature protection | Thermal shutdown disables both switches when junction exceeds ~150°C - prevents permanent damage during overload or poor heatsinking. |
| Low-profile ThinSOT package | 1mm height, 2.9mm × 1.6mm footprint - ideal for space-constrained portable devices like smartphones and digital cameras. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage in slim smartphone designs with single Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.2V/600mA step-down regulator delivering stable core supply under dynamic load transients. Use Value: 96% efficiency and 300µA quiescent current maximize talk time and standby duration without requiring external diode or large passives. |
Use Scenario: Supplying image sensor and ISP core voltage in compact digital cameras operating from 3.6V nominal battery. IC Role / Device Role / Timing Role: Fixed-output buck converter providing low-noise 1.2V rail with fast transient response to burst capture loads. Use Value: 1.5MHz switching enables use of tiny 2.2µH inductor and 10µF ceramic output capacitor - reducing solution size by >40% vs. lower-frequency alternatives. |
| Wireless Modems | Portable Instruments |
Use Scenario: Generating 1.2V supply for RF transceiver ICs in LTE/5G USB dongles with strict thermal and EMI constraints. IC Role / Device Role / Timing Role: High-frequency synchronous buck regulator delivering clean, regulated power with minimal conducted EMI. Use Value: Pulse-skipping mode ensures low output ripple at idle, while current-mode control provides excellent line/load transient response (<10µs recovery). |
Use Scenario: Powering microcontroller and analog front-end in handheld test equipment powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Compact, robust DC/DC converter supporting wide input range (2.7V–4.2V) and full 600mA load across temperature. Use Value: Integrated overtemperature protection and -40°C to 85°C guaranteed operation ensure reliability in field-deployed instruments without derating. |
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 |
|---|---|---|---|
| LTC3406ES5-1.2#TRMPBF | Same package and pinout; differs in internal compensation - optimized for higher output capacitance (≥22µF) and lower ESR ceramics. | Better suited for applications using tantalum or polymer output caps; slightly reduced light-load efficiency due to fixed compensation. | Select LTC3406BES5-1.2#TRMPBF for ceramic-only designs with ≤10µF COUT; choose LTC3406ES5-1.2#TRMPBF if using ≥22µF low-ESR polymer caps. |
| LTC3405AES5-1.2#TRMPBF | 300mA max output, 0.8V fixed output, 20µA quiescent current - lower current rating and different VOUT. | Targeted at ultra-low-power MCU cores or sensors; insufficient for 600mA loads like processors or RF ICs. | Only viable as alternative if system load is ≤300mA and 0.8V output is acceptable; otherwise, not functionally substitutable. |
Compared with LTC3406ES5-1.2#TRMPBF and LTC3405AES5-1.2#TRMPBF, the LTC3406BES5-1.2#TRMPBF offers the optimal balance of 600mA capability, 1.2V fixed output, and ceramic-capacitor-optimized loop stability - making it the preferred choice for space-constrained, battery-powered 1.2V core supplies.
Availability
LTC3406BES5-1.2#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, wireless modems, portable instruments, and MP3 players requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC3406BES5-1.2#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance power management ICs with rigorous qualification and long-term product support.
The LTC3406B series was designed specifically for ultra-compact, high-efficiency 1.2V core regulation in portable Li-ion systems - emphasizing low quiescent current, thin packaging, and seamless integration with ceramic capacitors.
FAQ
What is the output voltage tolerance of the LTC3406BES5-1.2#TRMPBF?
The LTC3406BES5-1.2#TRMPBF provides a fixed 1.2V output with guaranteed tolerance of ±3% over temperature and line - specified as 1.164V minimum to 1.236V maximum at TA = 25°C. This tight regulation is achieved via factory-trimmed internal feedback resistors and a precision 0.8V reference.
Does the LTC3406BES5-1.2#TRMPBF require an external Schottky diode?
No, the LTC3406BES5-1.2#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 that eliminates diode forward-voltage loss and improves efficiency by up to 10%.
What is the recommended inductor value for the LTC3406BES5-1.2#TRMPBF?
The recommended inductor for the LTC3406BES5-1.2#TRMPBF is 2.2µH, such as Murata LQH3C2R2M24. This value balances ripple current (~240mA at 600mA load), size, and efficiency. Inductor DC resistance should be ≤0.2Ω, and saturation current rating ≥720mA to avoid core saturation under peak load.
How does the RUN pin function on the LTC3406BES5-1.2#TRMPBF?
The RUN pin (Pin 1) of the LTC3406BES5-1.2#TRMPBF controls device enable/disable: pulling above 1.5V enables regulation; pulling below 0.3V places the part in shutdown, drawing <1µA supply current. The pin must never be left floating - a pull-down resistor is recommended for default-off behavior.
Is the LTC3406BES5-1.2#TRMPBF RoHS compliant and lead-free?
Yes, the LTC3406BES5-1.2#TRMPBF is RoHS compliant and lead-free. It meets EU Directive 2011/65/EU and is manufactured with MSL1 moisture sensitivity rating. The "#TRMPBF" suffix explicitly denotes lead-free, halogen-free, and RoHS-compliant packaging per Analog Devices' standard specifications.
LTC3406BES5-1.2#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):
- 1.2V
- 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
LTC3406BES5-1.2#TRMPBF FAQ
1.How can I place an order for LTC3406BES5-1.2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406BES5-1.2#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 LTC3406BES5-1.2#TRMPBF reliable?
The price and inventory of LTC3406BES5-1.2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406BES5-1.2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406BES5-1.2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406BES5-1.2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406BES5-1.2#TRMPBF?
LTC3406BES5-1.2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406BES5-1.2#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 LTC3406BES5-1.2#TRMPBF?
For technical support, including LTC3406BES5-1.2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406BES5-1.2#TRMPBF requirements.
6.How does Aetrix verify that LTC3406BES5-1.2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406BES5-1.2#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 LTC3406BES5-1.2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406BES5-1.2#TRMPBF?
All LTC3406BES5-1.2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406BES5-1.2#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 LTC3406BES5-1.2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406BES5-1.2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3406BES5-1.2#TRMPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
