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Analog Devices Inc. LTC3563EDC#TRPBF
- Part No.:
- LTC3563EDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3563EDC#TRPBF.pdf
- Description:
- IC REG BUCK PROG 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,312
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Product details
Overview
LTC3563EDC#TRPBF 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 regulated outputs, operates from 2.5V–5.5V input, achieves up to 96% efficiency, and features 2.25MHz constant-frequency current-mode control with Burst Mode® operation.
For engineers reviewing the LTC3563EDC#TRPBF datasheet, LTC3563EDC#TRPBF pinout, LTC3563EDC#TRPBF application, or LTC3563EDC#TRPBF equivalent, key selection criteria include low-quiescent-current operation (26µA active, <1µA shutdown), 100% duty-cycle low-dropout capability, internal MOSFETs eliminating external Schottky diodes, and compatibility with ceramic output capacitors for minimal ripple and footprint.
Technical Context
The LTC3563EDC#TRPBF implements a constant-frequency, peak-current-mode control architecture with an internal 0.6V reference and integrated P-channel/N-channel synchronous power switches. Its feedback loop compares a resistor-divided VOUT against this reference to regulate output voltage via inductor peak current adjustment.
Burst Mode® operation enables discontinuous switching at light loads, reducing quiescent current to 26µA while maintaining regulation; the device transitions automatically between continuous and burst modes based on load demand. Undervoltage lockout (UVLO) activates below ~1.9V VIN, and internal soft-start ramps the reference over ~1ms to limit inrush current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA maximum continuous - sufficient for baseband processors, RF transceivers, and digital camera modules in handheld devices. |
| Input Voltage Range | 2.5V to 5.5V - fully covers single-cell Li-Ion battery discharge profile (4.2V → 2.7V) without external LDO pre-regulation. |
| Switching Frequency | 2.25MHz (typical) - enables use of compact 2.2µH inductors and 10µF ceramic capacitors, minimizing PCB area. |
| Quiescent Current | 26µA in active Burst Mode®, <1µA in shutdown - extends battery runtime during standby and sleep states. |
| Output Voltage Options | 1.28V or 1.87V selected by VSEL pin logic level - matches common core voltages for ARM-based microcontrollers and DSPs. |
| Efficiency | Up to 96% at mid-load - minimizes thermal stress and power loss in space-constrained portable enclosures. |
| Output Accuracy | ±2% over temperature and line/load - ensures reliable operation of voltage-sensitive digital logic and analog peripherals. |
Pinout & Package
The LTC3563EDC#TRPBF is housed in a thermally enhanced 6-lead 2mm × 2mm plastic DFN package with exposed pad (Pin 7 = PGND). The exposed pad 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 internal resistive divider; senses regulated output voltage for error amplifier comparison against 0.6V reference. |
| VIN (Pin 2) | Main power input | Supplies internal circuitry and power switches; requires local 10µF ceramic decoupling to GND for stable high-frequency operation. |
| GND (Pin 3) | Analog/digital ground | Reference return for internal circuits; must be tied to low-impedance system ground plane adjacent to exposed pad. |
| SW (Pin 4) | Switch node | Drain connection of internal P- and N-channel MOSFETs; connects directly to inductor; carries high di/dt square-wave current. |
| VSEL (Pin 5) | Output voltage select | Logic-controlled input: grounded → 1.28V output; floating or tied to VIN → 1.87V output; internal 1.3–3MΩ pull-up ensures default state. |
| RUN (Pin 6) | Enable/shutdown control | Active-high enable: >1.2V enables regulation; <0.3V forces shutdown (<1µA IQ); must not be left floating. |
| Exposed Pad (Pin 7) | Power ground (PGND) | Thermal and electrical ground path; mandatory solder connection to PCB ground plane for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable dual-output voltage | 1.28V or 1.87V configured solely by VSEL pin state - eliminates external resistor networks and simplifies BOM across multiple voltage rail designs. |
| Integrated synchronous MOSFETs | P-channel high-side + N-channel low-side switches with RDS(ON) ≤ 0.65Ω / 0.55Ω - removes need for external Schottky diode and associated layout complexity. |
| 2.25MHz fixed-frequency operation | Enables full ceramic capacitor design with 2.2µH inductor - reduces solution size by >40% vs lower-frequency alternatives requiring larger magnetics. |
| Burst Mode® low-IQ regulation | 26µA quiescent current with <20mVP-P output ripple - maintains tight regulation during deep-sleep states without sacrificing noise performance. |
| 100% duty-cycle low-dropout mode | Supports VIN as low as VOUT + ~100mV - extends usable battery life in end-of-discharge conditions for portable equipment. |
| Internal soft-start | ~1ms linear reference ramp - prevents output overshoot and limits inrush current into bulk output capacitance during power-up. |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor core voltage in GSM/UMTS smartphones operating from single Li-Ion cell. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable 1.28V or 1.87V at up to 500mA with fast transient response to CPU load changes. Use Value: Enables extended talk time via 96% peak efficiency and ultra-low 26µA quiescent current during idle periods. |
Use Scenario: Supplying RF transceiver IC and digital signal processor in 4G LTE customer premises equipment. IC Role / Device Role / Timing Role: High-frequency (2.25MHz) step-down converter providing clean, low-noise 1.87V rail with minimal EMI impact on sensitive RF sections. Use Value: Ceramic-capacitor compatibility and small 2mm×2mm DFN footprint reduce total solution size and simplify RF board layout. |
| Digital Cameras | MP3 Players |
Use Scenario: Powering image sensor interface and JPEG encoder ASIC in compact digital still/video cameras. IC Role / Device Role / Timing Role: Efficient 500mA buck converter supporting dynamic voltage scaling between capture (1.87V) and playback (1.28V) modes via VSEL pin. Use Value: Pin-selectable output eliminates need for separate regulators or firmware-controlled DACs, reducing component count and firmware overhead. |
Use Scenario: Regulating audio codec and flash memory supply in battery-powered portable media players. IC Role / Device Role / Timing Role: Low-ripple (≤20mVP-P) Buck converter operating in Burst Mode® to sustain >20-hour playback on single charge. Use Value: <1µA shutdown current and 100% duty-cycle operation preserve battery capacity during long standby intervals between music sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | Fixed 1.8V output; 2.25MHz switching; 400mA max output; 17µA IQ in PWM mode, 2.5µA in eco-mode. | Lacks pin-selectable voltage option; lower max current; no Burst Mode® - less suitable for dual-voltage or high-peak-load portable systems. | Choose TPS62231DRVR only if fixed 1.8V output and lower cost are prioritized over flexibility and light-load efficiency. |
| MAX17222ELT+T | 1.8V fixed output; 2.5MHz; 500mA; 1.6µA IQ in shutdown, 25µA in ultralow-noise mode; no VSEL pin. | No output voltage selection; lacks 100% duty-cycle dropout; optimized for ultra-low-noise rather than multi-rail adaptability. | Select MAX17222ELT+T where EMI-sensitive analog subsystems require lowest possible switching noise, accepting fixed-voltage constraint. |
Compared with TPS62231DRVR and MAX17222ELT+T, the LTC3563EDC#TRPBF uniquely combines pin-selectable dual output voltage, 100% duty-cycle operation, and Burst Mode® efficiency - making it the preferred choice for multi-voltage, battery-critical handheld designs requiring both flexibility and longevity.
Availability
LTC3563EDC#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 manufacturability and consistent parametric performance.
Supply support for LTC3563EDC#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 legacy of high-performance power management ICs for precision, portable, and industrial applications.
The LTC3563EDC#TRPBF belongs to Linear's µPower synchronous buck converter family, designed specifically for ultra-low-power, space-constrained battery-operated devices demanding high efficiency across wide load ranges.
FAQ
What is the recommended input and output capacitor configuration for the LTC3563EDC#TRPBF?
The LTC3563EDC#TRPBF is optimized for ceramic capacitors: 10µF X5R/X7R ceramic for both CIN and COUT is recommended per the datasheet. This configuration ensures low ESR, minimal output ripple (<20mVP-P), stable loop response without ESR dependency, and compact PCB footprint. An additional 0.1µF–1µF high-frequency ceramic cap on VIN improves decoupling.
Does the LTC3563EDC#TRPBF require an external Schottky diode?
No, the LTC3563EDC#TRPBF does not require an external Schottky diode. It integrates both P-channel high-side and N-channel low-side synchronous MOSFETs, eliminating conduction losses and thermal concerns associated with external diodes. This integration reduces component count, improves efficiency, and simplifies layout.
How does the VSEL pin determine output voltage on the LTC3563EDC#TRPBF?
On the LTC3563EDC#TRPBF, the VSEL pin sets output voltage: tying VSEL to GND selects 1.28V; leaving VSEL floating or connecting it to VIN selects 1.87V. An internal 1.3–3MΩ pull-up resistor ensures default 1.87V operation if VSEL is unconnected, enabling simple hardware-configurable dual-rail support without external components.
What is the thermal performance of the LTC3563EDC#TRPBF in a typical 2-layer PCB layout?
In a standard 2-layer PCB with the exposed pad soldered to a 1cm² ground pour, the LTC3563EDC#TRPBF exhibits θJA ≈ 102°C/W. With proper 4-layer board mounting (exposed pad soldered to internal ground plane), θJA drops to 40°C/W. At 500mA load, 3.6V input, and 70°C ambient, junction temperature remains at ~76°C - well below the 125°C maximum.
Can the LTC3563EDC#TRPBF operate with input voltage below 2.5V?
No, the LTC3563EDC#TRPBF has a specified minimum operating input voltage of 2.5V. Below this, undervoltage lockout (UVLO) disables operation - the device shuts down when VIN falls below ~1.9V (rising threshold) to prevent unstable regulation. It cannot regulate at 2.2V or lower, even in 100% duty-cycle mode.
LTC3563EDC#TRPBF 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#TRPBF FAQ
1.How can I place an order for LTC3563EDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3563EDC#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 LTC3563EDC#TRPBF reliable?
The price and inventory of LTC3563EDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3563EDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3563EDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3563EDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3563EDC#TRPBF?
LTC3563EDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3563EDC#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 LTC3563EDC#TRPBF?
For technical support, including LTC3563EDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3563EDC#TRPBF requirements.
6.How does Aetrix verify that LTC3563EDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3563EDC#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 LTC3563EDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3563EDC#TRPBF?
All LTC3563EDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3563EDC#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 LTC3563EDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3563EDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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