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Analog Devices Inc. LTC3406BES5-1.5#TRPBF
- Part No.:
- LTC3406BES5-1.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406BES5-1.5#TRPBF.pdf
- Description:
- IC REG BUCK 1.5V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,964
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Product details
Overview
LTC3406BES5-1.5#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 at 1.5V fixed output with 1.5MHz constant-frequency current-mode control. It operates from 2.5V to 5.5V input, achieves up to 96% efficiency, supports 100% duty cycle for low-dropout operation, and draws only 300µA quiescent current - ideal for single-cell Li-ion portable systems such as digital cameras and MP3 players.
For engineers reviewing the LTC3406BES5-1.5#TRPBF datasheet, LTC3406BES5-1.5#TRPBF pinout, LTC3406BES5-1.5#TRPBF application, or LTC3406BES5-1.5#TRPBF equivalent, key selection criteria include its fixed 1.5V output, 1.5MHz switching frequency enabling compact 2.2µH inductors, internal synchronous MOSFETs eliminating external Schottky diodes, ±1.5% output voltage accuracy over temperature, and thermal shutdown protection.
Technical Context
The LTC3406BES5-1.5#TRPBF implements a constant-frequency, peak-current-mode control architecture with internal P-channel main and N-channel synchronous switches. Its oscillator is factory-trimmed to 1.5MHz (±20%), enabling stable regulation with minimal external components while supporting pulse-skipping mode at light loads to maintain high efficiency down to 10µA output current.
Feedback is internally divided for the fixed 1.5V output (VFB = 0.6V reference), and the RUN pin provides precise enable/disable control with 0.3V to 1.5V threshold. Overvoltage lockout triggers at +7.8% above nominal output (ΔVOVL = 11.7mV), and overtemperature protection disables both switches when junction temperature exceeds ~150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1.5% (1.455V–1.545V) - ensures stable core logic supply for low-voltage microcontrollers and ASICs. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single Li-ion (2.7–4.2V) and regulated 3.3V/5V rails without external LDO pre-regulation. |
| Switching Frequency | 1.5MHz (typ), 1.2–1.8MHz (min/max) - allows use of small 2.2µH surface-mount inductors and ceramic capacitors under 1206 size. |
| Max Output Current | 600mA continuous - sufficient for powering DSPs, RF transceivers, and sensor interfaces in handheld devices. |
| Quiescent Current | 300µA (no load), <1µA in shutdown - extends battery runtime in standby modes of portable instrumentation. |
| Efficiency | Up to 96% at 3VIN/1.5VOUT/600mA - minimizes thermal rise in confined PCB areas and reduces heat sink requirements. |
| Duty Cycle Range | 0% to 100% - enables dropout operation down to VIN ≈ VOUT + ILOAD × RDS(ON), critical for end-of-battery-life performance. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm profile, 0.95mm × 2.9mm footprint - optimized for space-constrained portable PCB layouts with thermal pad omitted (θJA = 250°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable control input | Active-high logic: >1.5V enables regulation; <0.3V forces shutdown (<1µA IQ); must not float. |
| GND (Pin 2) | Power and signal ground reference | Primary return path for VIN, SW, and feedback; requires low-inductance connection to power plane. |
| SW (Pin 3) | Switch node | Drain connection of internal P- and N-channel MOSFETs; high dv/dt node requiring short, wide trace routing. |
| VIN (Pin 4) | Main input supply | Accepts 2.5–5.5V; must be decoupled within 2mm of pin using ≥2.2µF X5R/X7R ceramic capacitor. |
| VOUT (Pin 5) | Fixed-output feedback node | Internally connected to 1.5V divider; serves as output voltage sense point - connect directly to (+) terminal of COUT. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces BOM count, improves efficiency by 5–10% vs. asynchronous designs at medium loads. |
| 100% duty cycle operation | Enables VIN down to ~1.55V at 600mA (RDS(ON) ≈ 0.5Ω) - extends usable battery range beyond conventional buck limits. |
| Pulse-skipping mode | Maintains regulation at light loads (<10mA) with low output ripple - avoids audible noise and preserves efficiency in sleep states. |
| Internal 0.6V reference | Supports accurate fixed 1.5V output (VOUT = 0.6V × (1 + R1/R2)) with ±0.25% initial tolerance and ±0.04%/°C line regulation. |
| Overvoltage lockout | Disables switching if output exceeds 1.5V + 11.7mV - protects downstream 1.5V logic from transient overvoltage damage. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage in GSM/UMTS handsets operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary 1.5V synchronous buck regulator supplying CPU core rail with fast load-transient response. Use Value: 96% peak efficiency and 300µA quiescent current extend talk time by >12% versus legacy PWM controllers. | Use Scenario: Supplying image sensor interface and ISP core voltage during burst capture mode. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter delivering clean 1.5V at up to 600mA with <100mV load-step deviation. Use Value: 1.5MHz switching enables compact 2.2µH inductor placement adjacent to sensor module, minimizing EMI coupling. |
| MP3 Players | Portable Instruments |
Use Scenario: Regulating audio DAC and headphone amplifier supply in flash-based music players. IC Role / Device Role / Timing Role: Low-noise step-down regulator operating in pulse-skipping mode during decode idle cycles. Use Value: <1µA shutdown current and 100% duty cycle preserve battery charge for >100 hours in pause mode. | Use Scenario: Powering precision ADC front-end and microcontroller in handheld multimeters or gas detectors. IC Role / Device Role / Timing Role: Stable 1.5V rail generator with ±1.5% output accuracy over –40°C to +85°C ambient. Use Value: Internal overtemperature protection prevents thermal runaway during extended field-use at elevated ambient temperatures. |
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 | Fixed 1.5V output, 3MHz switching, 400mA max, 17µA quiescent current - higher frequency but lower current rating and no 100% duty cycle. | Better suited for ultra-low-IQ always-on rails; unsuitable for 600mA peak loads or deep-dropout Li-ion operation. | Select only if system prioritizes ultra-low standby current over peak load capability and dropout margin. |
| RT8059GJ6 | Fixed 1.5V output, 1.5MHz, 600mA, 40µA IQ, but lacks overvoltage lockout and has ±2% output tolerance. | Lower cost alternative for non-safety-critical consumer applications where 1.47–1.53V tolerance is acceptable. | Choose when BOM cost is primary constraint and OVP is implemented externally or not required. |
Compared with TPS62231DRVR and RT8059GJ6, the LTC3406BES5-1.5#TRPBF uniquely combines 600mA capability, 100% duty cycle, integrated OVP, and ±1.5% output accuracy - making it the only option qualified for high-reliability portable systems requiring full battery-voltage-range operation without external supervision.
Availability
LTC3406BES5-1.5#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, digital still cameras, MP3 players, portable instruments, and wireless modems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LTC3406BES5-1.5#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving aerospace, industrial, automotive, and communications markets.
The LTC3406B series was designed specifically for space- and efficiency-constrained portable electronics, emphasizing low quiescent current, thin packaging, and robust operation across the full Li-ion voltage range without external compensation.
FAQ
What is the maximum input voltage rating for the LTC3406BES5-1.5#TRPBF?
The absolute maximum input voltage for the LTC3406BES5-1.5#TRPBF is 6V, but the recommended operating range is 2.5V to 5.5V. Exceeding 6V may cause permanent damage to the internal P-channel MOSFET. The device is optimized for single Li-ion battery inputs (2.7V–4.2V), and operation at 5.5V is supported with proper thermal design due to increased RDS(ON) conduction loss.
Does the LTC3406BES5-1.5#TRPBF require an external Schottky diode?
No, the LTC3406BES5-1.5#TRPBF does not require an external Schottky diode because it integrates both a P-channel high-side and N-channel low-side synchronous MOSFET. This architecture eliminates reverse recovery losses and improves efficiency by 5–10% compared to asynchronous buck converters - a key advantage explicitly stated in the LTC3406BES5-1.5#TRPBF datasheet.
What is the output voltage accuracy of the LTC3406BES5-1.5#TRPBF over temperature?
The LTC3406BES5-1.5#TRPBF guarantees output voltage accuracy of ±1.5% over the full –40°C to +85°C operating temperature range. At 25°C, the typical output is 1.500V with min/max bounds of 1.455V and 1.545V. This accuracy is maintained by the internal 0.6V reference with ±0.04%/V line regulation and ±0.0025V/°C temperature coefficient.
Can the LTC3406BES5-1.5#TRPBF operate in dropout mode, and what is the minimum input voltage at 600mA load?
Yes, the LTC3406BES5-1.5#TRPBF supports 100% duty cycle dropout operation. At 600mA and 25°C, the minimum functional input voltage is approximately 1.55V (1.5V + 600mA × 0.083Ω), based on typical RDS(ON) of the P-channel switch. However, thermal derating applies: at 85°C ambient, RDS(ON) rises to ~0.52Ω, raising the practical dropout voltage to ~1.81V - confirmed in the "Dropout Operation" section of the LTC3406BES5-1.5#TRPBF datasheet.
Is the LTC3406BES5-1.5#TRPBF RoHS compliant and halogen-free?
Yes, the LTC3406BES5-1.5#TRPBF is RoHS compliant and halogen-free per Analog Devices' material declarations. The TSOT-23-5 package uses lead-free matte tin plating, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) - suitable for standard reflow soldering without preconditioning. Full compliance documentation is available in Analog Devices' official product change notices.
LTC3406BES5-1.5#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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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
LTC3406BES5-1.5#TRPBF FAQ
1.How can I place an order for LTC3406BES5-1.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406BES5-1.5#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 LTC3406BES5-1.5#TRPBF reliable?
The price and inventory of LTC3406BES5-1.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406BES5-1.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3406BES5-1.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406BES5-1.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406BES5-1.5#TRPBF?
LTC3406BES5-1.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406BES5-1.5#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 LTC3406BES5-1.5#TRPBF?
For technical support, including LTC3406BES5-1.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406BES5-1.5#TRPBF requirements.
6.How does Aetrix verify that LTC3406BES5-1.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406BES5-1.5#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 LTC3406BES5-1.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3406BES5-1.5#TRPBF?
All LTC3406BES5-1.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406BES5-1.5#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 LTC3406BES5-1.5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3406BES5-1.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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