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Analog Devices Inc. LTC3542IS6#TRPBF
- Part No.:
- LTC3542IS6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC3542IS6#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,983
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Product details
Overview
LTC3542IS6#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC converter with constant-frequency current-mode control, 2.25MHz switching, 500mA output capability, 2.5V–5.5V input range, and 0.6V reference for adjustable output down to 0.6V - optimized for single Li-Ion battery-powered portable electronics requiring high efficiency and low quiescent current.
For engineers reviewing the LTC3542IS6#TRPBF datasheet, LTC3542IS6#TRPBF pinout, LTC3542IS6#TRPBF application, or LTC3542IS6#TRPBF equivalent, key selection considerations include its 26μA operating supply current, 100% duty cycle dropout operation, Burst Mode® vs pulse-skip mode selection via MODE/SYNC, ±2% output voltage accuracy, and TSOT-23-6 package thermal performance at –40°C to 125°C.
Technical Context
The LTC3542IS6#TRPBF implements a fixed 2.25MHz current-mode buck architecture with internal P-channel and N-channel MOSFETs, enabling high efficiency without external diodes. Its error amplifier compares VFB against a 0.6V reference to regulate output voltage via peak inductor current control.
Operation supports three modes: Burst Mode® (26μA IQ, higher ripple), pulse-skip (lower noise), and external synchronization (1MHz–3MHz via MODE/SYNC). The RUN pin enables/disables the converter with <1μA shutdown current, while undervoltage lockout activates below ~2V VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-Ion (2.7V–4.2V) with margin for discharge and regulation. |
| Switching Frequency | 2.25MHz (internally set) - enables use of compact 2.2μH inductors and ceramic capacitors for minimal PCB footprint. |
| Output Current | 500mA continuous - sufficient for core logic, RF transceivers, and display drivers in handheld devices. |
| Quiescent Current | 26μA in Burst Mode® - extends battery runtime in standby or low-power sleep states. |
| Feedback Reference | 0.6V ±2% - allows precise output programming from 0.6V to VIN using external resistor divider. |
| Shutdown Current | <1μA - ensures near-zero battery drain when system is powered off. |
| Duty Cycle Range | 0% to 100% - supports low-dropout operation as input voltage approaches output level. |
Pinout & Package
Package: 6-Lead Plastic TSOT-23 (S6), 0.95mm height, –40°C to 125°C operating temperature range. Exposed pad not present (DFN variant has exposed GND pad; TSOT-23 does not).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Supplies main converter rail; requires local 10μF ceramic decoupling to GND. |
| GND (Pin 2) | Ground Reference | Primary return path for power and signal; connects internally to all ground nodes. |
| VFB (Pin 3) | Feedback Input | Monitors output via resistive divider; regulated to 0.6V; high-impedance (±30nA bias). |
| RUN (Pin 4) | Enable Control | Active-high enable: >1.5V enables, <0.3V disables; drives <1μA in shutdown. |
| MODE/SYNC (Pin 5) | Mode Selection / Clock Sync | GND = Burst Mode®, VIN = pulse-skip, external 1–3MHz clock = synchronized pulse-skip. |
| SW (Pin 6) | Switch Node | Connects to inductor; carries high di/dt switching waveform; must be routed with minimal loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Reduces quiescent current to 26μA while maintaining regulation - critical for battery longevity in intermittent-load applications. |
| No External Schottky Diode Required | Integrated synchronous rectification eliminates conduction loss and board space for discrete diode. |
| Internal Soft-Start | Linear 1ms ramp of 0.6V reference prevents inrush current and output overshoot during power-up. |
| Ceramic Capacitor Optimized | Stable with low-ESR ceramic COUT; achieves <20mVP-P ripple without relying on capacitor ESR for loop compensation. |
| Overtemperature Protection | Thermal shutdown disables switches if junction exceeds ~160°C - prevents damage under overload or poor heatsinking. |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor and RF front-end from single Li-Ion cell with dynamic load changes. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.2V/1.8V/2.5V rails with fast transient response. Use Value: 96% peak efficiency and 26μA Burst Mode® current extend talk time and standby duration. | Use Scenario: Supplying 3.3V logic and 1.8V PHY in DSL or LTE modem modules with tight space constraints. IC Role / Device Role / Timing Role: Compact, high-frequency DC/DC converter enabling small inductor and ceramic capacitor layout. Use Value: 2.25MHz operation reduces solution size by >40% versus 500kHz alternatives while maintaining low noise. |
| Digital Cameras | MP3 Players |
Use Scenario: Powering image sensor, ISP, and flash LED driver where burst loads demand low-output-impedance regulation. IC Role / Device Role / Timing Role: High peak switch current (1000mA) supports short-duration sensor/flash pulses without dropout. Use Value: 100% duty cycle maintains regulation even as battery discharges to 2.7V, preserving functionality until EOL. | Use Scenario: Regulating audio codec, NAND flash, and display backlight from aging Li-Ion battery. IC Role / Device Role / Timing Role: Low-noise pulse-skip mode (via MODE/SYNC = VIN) minimizes audible switching artifacts in audio path. Use Value: <20mVP-P output ripple ensures clean analog supply for DACs and amplifiers without added LC filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz fixed frequency, 300mA output, 2.05V–6.5V input, 17μA IQ in PWM mode - lower current rating and no Burst Mode®. | Best suited for lower-power always-on sensors; lacks 100% duty cycle and wide VIN flexibility. | Select if 3MHz switching and ultra-low IQ in forced-PWM are prioritized over high-current capability. |
| MAX17222ETA+T | 1.2MHz, 500mA, 2.0V–5.5V input, 2.5μA IQ in shutdown, integrated soft-start - no MODE/SYNC pin or external sync capability. | Targeted at cost-sensitive wearables; missing pulse-skip/Burst Mode® configurability and 2.25MHz option. | Choose when minimal BOM count and lowest shutdown IQ are critical, and 1.2MHz is acceptable. |
Compared with TPS62231DRVR and MAX17222ETA+T, the LTC3542IS6#TRPBF uniquely combines 2.25MHz operation, 500mA output, configurable low-power modes, and 100% duty cycle - making it optimal for Li-Ion systems demanding both high efficiency across load range and robust dropout behavior.
Availability
LTC3542IS6#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital cameras, MP3 players, and PDAs requiring stable component supply with guaranteed long-term availability and full temperature-grade compliance.
Supply support for LTC3542IS6#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 high-performance power management portfolio with rigorous automotive and industrial qualification standards.
The LTC3542IS6#TRPBF belongs to Linear's precision monolithic DC/DC converter family, designed specifically for space-constrained, battery-powered portable electronics needing high efficiency, low IQ, and seamless transition between operating modes.
FAQ
What is the maximum output current capability of the LTC3542IS6#TRPBF?
The LTC3542IS6#TRPBF delivers up to 500mA continuous output current under typical conditions (VIN ≥ 2.7V, TA ≤ 85°C). Peak switch current is rated at 1000mA, supporting short-duration pulse loads common in digital camera or flash LED applications without dropout or thermal shutdown.
Does the LTC3542IS6#TRPBF require an external Schottky diode?
No, the LTC3542IS6#TRPBF does not require an external Schottky diode. It integrates both high-side P-channel and low-side N-channel MOSFETs for synchronous rectification, eliminating conduction losses and simplifying the bill of materials compared to asynchronous buck converters.
How does the MODE/SYNC pin configure operating modes on the LTC3542IS6#TRPBF?
The MODE/SYNC pin on the LTC3542IS6#TRPBF selects between three functions: grounding enables Burst Mode® (26μA IQ), connecting to VIN enables pulse-skip mode (lower ripple), and applying a 1MHz–3MHz external clock synchronizes switching while auto-selecting pulse-skip mode - all without changing external components.
What is the operating temperature range for the LTC3542IS6#TRPBF?
The LTC3542IS6#TRPBF is specified for operation from –40°C to +125°C (I-grade), verified across the full range per datasheet Table 1. This makes it suitable for industrial and extended-temperature portable applications where ambient conditions exceed commercial-grade limits.
Can the LTC3542IS6#TRPBF operate with ceramic output capacitors only?
Yes, the LTC3542IS6#TRPBF is explicitly designed to be stable with ceramic output capacitors - including X5R and X7R types - due to its current-mode architecture and internal compensation. Typical designs use 10μF ceramic COUT, achieving <20mVP-P ripple without requiring ESR-based damping.
LTC3542IS6#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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:
- 500mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC3542IS6#TRPBF FAQ
1.How can I place an order for LTC3542IS6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3542IS6#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 LTC3542IS6#TRPBF reliable?
The price and inventory of LTC3542IS6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3542IS6#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3542IS6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3542IS6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3542IS6#TRPBF?
LTC3542IS6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3542IS6#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 LTC3542IS6#TRPBF?
For technical support, including LTC3542IS6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3542IS6#TRPBF requirements.
6.How does Aetrix verify that LTC3542IS6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3542IS6#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 LTC3542IS6#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3542IS6#TRPBF?
All LTC3542IS6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3542IS6#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 LTC3542IS6#TRPBF part is unused and in its original packaging.
Return procedure for LTC3542IS6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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