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Analog Devices Inc. LTC3563EDC#TRMPBF
- Part No.:
- LTC3563EDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3563EDC#TRMPBF.pdf
- Description:
- IC REG BUCK PROG 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:415
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Product details
Overview
LTC3563EDC#TRMPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC converter optimized for single Li-Ion battery-powered portable systems. It delivers up to 500mA output current, supports pin-selectable 1.28V or 1.87V output voltages, operates from 2.5V to 5.5V input, achieves up to 96% efficiency, and features 2.25MHz fixed-frequency current-mode control with Burst Mode® operation.
For engineers reviewing the LTC3563EDC#TRMPBF datasheet, LTC3563EDC#TRMPBF pinout, LTC3563EDC#TRMPBF application, or LTC3563EDC#TRMPBF equivalent, key selection criteria include its ultra-low 26µA quiescent current in active mode, 100% duty cycle low-dropout capability, integrated power MOSFETs eliminating external Schottky diodes, ±2% output voltage accuracy, and 2mm × 2mm 6-lead DFN package with exposed thermal pad.
Technical Context
The LTC3563EDC#TRMPBF implements a constant-frequency, current-mode synchronous buck architecture with internal P-channel and N-channel MOSFETs. Its control loop compares a divided VOUT against a precise 0.6V reference using an error amplifier, adjusting peak inductor current per cycle to maintain regulation.
Burst Mode® operation activates under light loads, intermittently enabling switching cycles to sustain regulation while reducing supply current to 26µA; shutdown draws <1µA. The device integrates internal soft-start (1ms ramp), undervoltage lockout (2.0V falling threshold), and overtemperature protection, and is explicitly designed for stable operation with ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA maximum continuous load current without derating |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (2.7V–4.2V) and regulated 3.3V/5V rails |
| Output Voltage Options | 1.28V or 1.87V selected by VSEL pin logic level - enables dual-rail system design without external resistors |
| Switching Frequency | 2.25MHz typical - permits use of compact 2.2µH inductors and 10µF ceramic capacitors |
| Quiescent Current | 26µA in active Burst Mode® - extends battery runtime in standby states |
| Efficiency | Up to 96% at 500mA - minimizes thermal dissipation in space-constrained handheld devices |
| Output Accuracy | ±2% over temperature and line/load - ensures reliable core voltage delivery for digital ICs |
| Thermal Protection | Overtemperature shutdown at ~150°C junction - prevents permanent damage during overload or poor PCB heatsinking |
Pinout & Package
The LTC3563EDC#TRMPBF is housed in a thermally enhanced 2mm × 2mm 6-lead plastic DFN package with an exposed ground pad (Pin 7) that must be soldered to PCB ground for electrical integrity and optimal thermal performance (θJA = 40°C/W when properly mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Feedback node | Connects to output capacitor; internally divided to compare against 0.6V reference for regulation |
| VIN (Pin 2) | Main power input | Accepts 2.5V–5.5V supply; requires local 10µF ceramic decoupling to GND |
| GND (Pin 3) | Analog/digital ground | Reference return for internal circuitry; connects to PCB ground plane |
| SW (Pin 4) | Switch node | Drain connection of internal P- and N-channel MOSFETs; drives external inductor |
| VSEL (Pin 5) | Output voltage select | Ground → 1.28V output; floating or tied to VIN → 1.87V output |
| RUN (Pin 6) | Enable/disable control | High (>1.5V) enables converter; low (<0.3V) forces shutdown drawing <1µA |
| Exposed Pad (Pin 7) | Power ground (PGND) | Mandatory solder connection to PCB ground for thermal conduction and low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous power switches | Eliminates need for external Schottky diode and reduces conduction losses vs asynchronous designs |
| 100% duty cycle operation | Enables dropout operation down to VIN ≈ VOUT + 0.1V, maximizing usable battery voltage range |
| Internal soft-start | 1ms linear reference ramp prevents inrush current and output overshoot during power-up |
| Ceramic-capacitor optimized loop | Stable with low-ESR X5R/X7R ceramics - enables <20mVP-P output ripple and minimal PCB footprint |
| Low-noise Burst Mode® | Maintains regulation at light loads while limiting switching frequency and gate charge loss to achieve 26µA IQ |
| Robust protection suite | Includes undervoltage lockout (2.0V), overtemperature shutdown, and switch leakage monitoring |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor core voltage in GSM/UMTS/LTE handsets operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering tightly regulated 1.28V or 1.87V to CPU subsystem. Use Value: 96% peak efficiency and 26µA quiescent current directly extend talk time and standby duration. | Use Scenario: Supplying RF transceiver and digital signal processor in 4G/5G IoT modems with intermittent data transmission. IC Role / Device Role / Timing Role: High-efficiency, low-noise power source enabling rapid wake-from-sleep transitions. Use Value: Burst Mode® operation maintains regulation during idle periods while minimizing average power draw. |
| Digital Cameras | MP3 Players |
Use Scenario: Providing image sensor I/O and DSP core voltage in compact portable cameras with burst capture mode. IC Role / Device Role / Timing Role: Fast-transient-response buck converter supporting dynamic load steps during image processing. Use Value: Current-mode control delivers excellent load transient response (<20µs recovery) and low output ripple for clean analog imaging paths. | Use Scenario: Powering audio codec and flash memory controller in battery-operated portable media players. IC Role / Device Role / Timing Role: Low-noise, high-efficiency DC/DC converter supplying stable voltage to sensitive audio circuitry. Use Value: Ceramic-capacitor compatibility ensures <20mVP-P ripple, preventing audible noise in headphone outputs. |
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 switching frequency; fixed 1.8V output; 300mA max output; 17µA IQ | Lacks pin-selectable voltage; lower current rating limits use in higher-power processors | Select when fixed 1.8V and smaller solution size outweigh need for dual-voltage flexibility and 500mA capability |
| MAX17222ATA+T | 2.5MHz frequency; 1.2V/1.5V/1.8V/2.5V/3.3V selectable via external resistor; 500mA; 2.5µA IQ in shutdown | Requires external resistor network for voltage selection; higher shutdown IQ than LTC3563EDC#TRMPBF's <1µA | Choose when multi-voltage programmability beyond two points justifies added BOM cost and layout area |
Compared with TPS62231DRVR and MAX17222ATA+T, the LTC3563EDC#TRMPBF uniquely combines pin-selectable dual-output voltage, 500mA capability, 26µA active IQ, and 2.25MHz operation in a 2mm × 2mm DFN-making it optimal for space- and battery-life-constrained dual-rail portable systems where layout simplicity and guaranteed low-load efficiency are critical.
Availability
LTC3563EDC#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, and digital cameras requiring stable component supply across high-mix, low-volume production runs and long-lifecycle portable electronics programs.
Supply support for LTC3563EDC#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 continues its legacy of high-performance analog, power management, and mixed-signal ICs for demanding applications.
The LTC3563EDC#TRMPBF belongs to Linear's precision monolithic DC/DC converter product line, engineered specifically for ultra-low-power, high-efficiency power conversion in battery-powered portable electronics.
FAQ
What is the function of the VSEL pin on the LTC3563EDC#TRMPBF?
The VSEL pin on the LTC3563EDC#TRMPBF selects the regulated output voltage: tying VSEL to GND sets VOUT to 1.28V, while leaving it floating or connecting it to VIN selects 1.87V. This pin eliminates external feedback resistors and enables simple dual-voltage system design. The LTC3563EDC#TRMPBF's internal resistor divider and reference ensure ±2% accuracy across temperature and line conditions for both settings.
Does the LTC3563EDC#TRMPBF require an external Schottky diode?
No, the LTC3563EDC#TRMPBF does not require an external Schottky diode. It integrates both P-channel high-side and N-channel low-side synchronous power MOSFETs, enabling full synchronous rectification. This design eliminates reverse-recovery losses and forward voltage drop associated with external diodes, contributing directly to the LTC3563EDC#TRMPBF's up to 96% efficiency and reduced thermal load.
What is the minimum recommended input voltage for reliable operation of the LTC3563EDC#TRMPBF?
The LTC3563EDC#TRMPBF has an absolute minimum input voltage of –0.3V, but its functional operating range begins at 2.5V. Below approximately 2.0V, the undervoltage lockout (UVLO) circuit disables the converter to prevent unstable operation. Therefore, the minimum recommended input voltage for sustained regulation is 2.5V, with reliable startup occurring above 2.0V (rising threshold). The LTC3563EDC#TRMPBF maintains 100% duty cycle down to VIN ≈ VOUT + 0.1V within this range.
How does Burst Mode® operation improve battery life in the LTC3563EDC#TRMPBF?
Burst Mode® operation in the LTC3563EDC#TRMPBF reduces quiescent current to 26µA during light loads by intermittently enabling switching cycles only as needed to maintain output regulation. This minimizes gate charge and switching losses dominant at low currents, significantly extending battery runtime in standby or idle states. The LTC3563EDC#TRMPBF exits Burst Mode® seamlessly as load increases, ensuring no performance penalty during active operation.
What thermal considerations apply to the LTC3563EDC#TRMPBF's exposed pad?
The exposed pad (Pin 7) of the LTC3563EDC#TRMPBF is PGND and must be soldered to a PCB ground plane to achieve the specified θJA of 40°C/W. Failure to do so raises thermal resistance dramatically - potentially exceeding the 125°C maximum junction temperature even at moderate loads. Proper soldering ensures both electrical grounding and efficient heat conduction away from the die, which is critical for maintaining reliability in compact portable enclosures where airflow is limited. The LTC3563EDC#TRMPBF includes overtemperature shutdown at ~150°C as a final safety measure.
LTC3563EDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.28V, 1.87V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC3563EDC#TRMPBF FAQ
1.How can I place an order for LTC3563EDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3563EDC#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 LTC3563EDC#TRMPBF reliable?
The price and inventory of LTC3563EDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3563EDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3563EDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3563EDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3563EDC#TRMPBF?
LTC3563EDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3563EDC#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 LTC3563EDC#TRMPBF?
For technical support, including LTC3563EDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3563EDC#TRMPBF requirements.
6.How does Aetrix verify that LTC3563EDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3563EDC#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 LTC3563EDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3563EDC#TRMPBF?
All LTC3563EDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3563EDC#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 LTC3563EDC#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3563EDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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