My Inquiry
My Account
Analog Devices Inc. LTC3406BES5#TRMPBF
- Part No.:
- LTC3406BES5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406BES5#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3406BES5#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency monolithic synchronous step-down DC/DC regulator in a 5-lead TSOT-23 package, delivering up to 600mA output current at 1.8V with 2.5V–5.5V input range, 1.5MHz fixed switching frequency, and 96% peak efficiency. It enables compact, low-noise power for single-cell Li-ion portable systems.
For engineers reviewing the LTC3406BES5#TRMPBF datasheet, LTC3406BES5#TRMPBF pinout, LTC3406BES5#TRMPBF application, or LTC3406BES5#TRMPBF equivalent, key selection criteria include its 0.6V feedback reference for low-output-voltage design, 100% duty-cycle dropout operation, shutdown current <1µA, and integrated P/N-channel MOSFETs eliminating external Schottky diodes.
Technical Context
The LTC3406BES5#TRMPBF employs constant-frequency current-mode control with internal slope compensation to prevent subharmonic oscillation above 40% duty cycle. Its architecture integrates a 0.4Ω P-channel main switch and 0.35Ω N-channel synchronous switch, enabling high efficiency across load and input voltage ranges.
It operates in pulse-skipping mode at light loads to maintain regulation while minimizing output ripple, and features overtemperature protection, output overvoltage lockout (7.8% above VOUT), and precise 0.6V ±1.5% reference voltage stable over –40°C to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports full discharge range of single Li-ion battery (2.7V–4.2V). |
| Output Current | 600mA continuous - sufficient for core logic, RF transceivers, and sensor subsystems in portable devices. |
| Switching Frequency | 1.5MHz (typ) - enables use of small 2.2µH inductors and ceramic capacitors for space-constrained layouts. |
| Feedback Reference | 0.6V ±1.5% - allows precise programming of output voltages down to 0.6V via external resistor divider. |
| Quiescent Current | 300µA (no load), <1µA in shutdown - extends battery runtime in standby and sleep modes. |
| Duty Cycle | 100% - maintains regulation during low-input-voltage dropout, critical for end-of-battery-life operation. |
| Efficiency | Up to 96% - minimizes thermal stress and maximizes usable energy from battery source. |
Pinout & Package
Package: 5-lead plastic TSOT-23 (S5), 1mm profile, 2.9mm × 1.6mm footprint, θJA = 250°C/W.
| 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 - prevents floating state. |
| GND (Pin 2) | Power and signal ground | Common return path for input capacitor, inductor, and feedback network - must be low-impedance connection. |
| SW (Pin 3) | Switch node | Connects to inductor and drains of internal P/N-MOSFETs - high dv/dt node requiring careful layout separation from sensitive analog traces. |
| VIN (Pin 4) | Main input supply | Accepts 2.5V–5.5V; requires local 4.7µF ceramic decoupling directly to GND (Pin 2) to suppress switching noise. |
| VOUT (Pin 5) | Fixed-output feedback | Internally connected to 1.8V resistive divider - no external resistor needed; used only for LTC3406BES5-1.8 variant. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces conduction loss and board area, improving efficiency by ~5–8% vs asynchronous designs. |
| Pulse-skipping mode | Maintains tight output regulation at light loads (<10mA) without increasing output ripple - ideal for intermittent-sensing applications. |
| Low dropout operation | 100% duty cycle allows VOUT to track VIN down to VOUT + ILOAD×RDS(ON) - extends usable battery life by >15 minutes in deep-discharge scenarios. |
| Thermal shutdown | Activates at ~150°C junction temperature - protects device during sustained overload or poor PCB thermal design. |
| Overvoltage lockout | Triggers if VOUT exceeds VFB by >50mV (or 7.8% of VOUT) - prevents damage to downstream 1.8V logic during startup or fault conditions. |
Applications
| Cellular Handset Power | Wireless Modem Core Supply |
|---|---|
Use Scenario: Regulating 3.6V Li-ion battery to 1.8V for baseband processor core rails in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary synchronous buck converter providing clean, regulated 1.8V at up to 600mA with fast transient response to burst-mode transmission loads. Use Value: 96% efficiency at 500mA reduces heat generation in sealed handset enclosures; 1.5MHz switching avoids interference with cellular RF bands. | Use Scenario: Powering PHY and MAC layers in 802.11b/g/n Wi-Fi or DSL modem SoCs requiring stable 1.8V under dynamic data traffic. IC Role / Device Role / Timing Role: Fixed-output DC/DC regulator supplying low-noise 1.8V to digital signal processors and interface logic with minimal external components. Use Value: Pulse-skipping mode ensures <1µA quiescent draw during idle periods, extending modem standby time; TSOT-23 footprint saves PCB area in compact modules. |
| Digital Still Camera Sensor Rail | Portable Instrument ADC Reference Supply |
Use Scenario: Delivering 1.8V to CMOS image sensor and ISP in compact digital cameras with battery-only operation. IC Role / Device Role / Timing Role: High-efficiency step-down regulator supporting rapid on/off cycling during image capture bursts and preview mode. Use Value: 100% duty cycle sustains 1.8V output as battery drops to 2.7V - prevents sensor reset or frame loss during low-battery operation. | Use Scenario: Generating ultra-stable 1.8V supply for precision 16-bit SAR ADC reference and analog front-end in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with 0.6V reference accuracy ±1.5% - ensures <0.01% full-scale error contribution from supply drift. Use Value: Ceramic-capacitor compatible design achieves <5mVpp output ripple - eliminates need for post-regulation LDO filtering, reducing BOM count and cost. |
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 | 1.8V fixed output, 600mA, 3MHz switching, 2.05V–6.5V input, 22µA IQ | Higher switching frequency enables smaller inductors but increases EMI sensitivity; lower IQ benefits ultra-low-power sleep states. | Prefer for space-constrained designs needing <1.5mm height; verify EMI compliance in RF-dense environments. |
| MAX17222ETA+T | 1.8V fixed output, 500mA, 1.2MHz, 2.0V–5.5V input, 2.5µA IQ in shutdown | Lower max current and wider input range; optimized for coin-cell and energy-harvesting applications. | Prefer when input may dip below 2.5V or when <3µA shutdown current is mandatory; derate output to 500mA. |
Compared with LTC3406BES5#TRMPBF, TPS62231DRYR offers higher frequency and lower IQ but less robust dropout behavior below 2.5V, while MAX17222ETA+T trades 100mA output headroom for superior ultra-low-IQ performance and broader input flexibility - both require revalidation of loop stability and thermal margins.
Availability
LTC3406BES5#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital still cameras, and portable instruments requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3406BES5#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. (including legacy Linear Technology products) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving precision instrumentation, communications, and industrial markets.
The LTC3406B series was designed specifically for high-efficiency, low-profile power conversion in battery-powered portable electronics - emphasizing minimal external components, wide input range, and seamless transition between PWM and pulse-skipping modes.
FAQ
What is the maximum output current capability of the LTC3406BES5#TRMPBF?
The LTC3406BES5#TRMPBF delivers up to 600mA continuous output current at 1.8V when VIN ≥ 3V and ambient temperature ≤ 85°C. At lower input voltages (e.g., 2.7V), maximum current reduces to ~500mA due to increased RDS(ON) and thermal limits - refer to Figure 2 in the datasheet for derating curves. The LTC3406BES5#TRMPBF uses internal P/N-MOSFETs rated for 800mA peak sink/source, ensuring safe operation within its specified DC limit.
Does the LTC3406BES5#TRMPBF require an external Schottky diode?
No, the LTC3406BES5#TRMPBF does not require an external Schottky diode. It integrates both a P-channel main switch and an N-channel synchronous rectifier, enabling fully synchronous operation that eliminates reverse recovery losses and conduction losses associated with external diodes. This integration directly contributes to its 96% peak efficiency and allows for simpler, more compact PCB layouts compared to asynchronous buck regulators.
What is the function of Pin 5 (VOUT) on the LTC3406BES5#TRMPBF?
On the LTC3406BES5#TRMPBF, Pin 5 is labeled VOUT and serves as the fixed 1.8V output feedback terminal. Internally, it connects to a precision resistive divider that scales the output voltage to match the 0.6V reference - no external resistors are required. This differs from the adjustable LTC3406B version (which uses Pin 5 as VFB). The LTC3406BES5#TRMPBF is factory-configured for 1.8V output, and Pin 5 must be connected directly to the output capacitor's positive terminal for proper regulation.
How does the LTC3406BES5#TRMPBF behave during input voltage dropout?
During input voltage dropout, the LTC3406BES5#TRMPBF enters 100% duty-cycle operation: the P-channel main switch remains continuously on, passing input voltage minus ILOAD × RDS(ON) to the output. This maintains regulation down to VIN ≈ VOUT + (ILOAD × 0.5Ω), extending usable battery life. At 600mA and 70°C, RDS(ON) is ~0.52Ω, so minimum VIN is ~1.8V + 0.31V = 2.11V - well within its 2.5V minimum rating. The LTC3406BES5#TRMPBF remains stable and functional throughout this mode without oscillation or shutdown.
Is the LTC3406BES5#TRMPBF RoHS compliant and lead-free?
Yes, the LTC3406BES5#TRMPBF is RoHS compliant and lead-free. The "#TRMPBF" suffix explicitly denotes tape-and-reel packaging with Pb-free (lead-free) finish and RoHS-compliant materials per Analog Devices' product marking conventions. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards. Full compliance documentation is available in the official Analog Devices product change notice (PCN) for this part number.
LTC3406BES5#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
LTC3406BES5#TRMPBF FAQ
1.How can I place an order for LTC3406BES5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406BES5#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#TRMPBF reliable?
The price and inventory of LTC3406BES5#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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406BES5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406BES5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406BES5#TRMPBF?
LTC3406BES5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406BES5#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#TRMPBF?
For technical support, including LTC3406BES5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406BES5#TRMPBF requirements.
6.How does Aetrix verify that LTC3406BES5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406BES5#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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406BES5#TRMPBF?
All LTC3406BES5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406BES5#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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406BES5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3406BES5#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…
