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Analog Devices Inc. LTC3564IDCB#TRMPBF
- Part No.:
- LTC3564IDCB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3564IDCB#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,308
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Product details
Overview
LTC3564IDCB#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, constant-frequency, current-mode synchronous step-down regulator optimized for single Li-Ion or 3.3V/5V input systems. It delivers up to 1.25A output current with 2.5V–5.5V input range, 2.25MHz switching frequency, and 0.6V feedback reference-enabling compact designs in portable power management for digital cameras and media players.
For engineers reviewing the LTC3564IDCB#TRMPBF datasheet, LTC3564IDCB#TRMPBF pinout, LTC3564IDCB#TRMPBF application, or LTC3564IDCB#TRMPBF equivalent, key selection criteria include its 20μA quiescent current in Burst Mode, 100% duty-cycle low-dropout capability, integrated P/N-channel MOSFETs eliminating external Schottky diodes, and DFN-6 (2mm × 3mm) thermal performance with θJA = 64°C/W.
Technical Context
The LTC3564IDCB#TRMPBF employs a proprietary current-mode control architecture with internal slope compensation that maintains stable operation across all duty cycles-including >40%-without reducing peak inductor current. Its dual-MOSFET synchronous rectification uses matched RDS(ON) (0.15Ω typ. for both P- and N-channel) to maximize efficiency and eliminate external diode losses.
Burst Mode operation dynamically disables switching circuitry between bursts, reducing supply current to 20μA at light loads while maintaining tight output regulation via feedback error amplifier wake-up thresholds. Overtemperature protection activates at ~150°C, forcing SW into high-impedance state to prevent thermal runaway during sustained dropout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports full discharge curve of single Li-Ion (2.7V–4.2V) and fixed 3.3V/5V rails without external LDO pre-regulation. |
| Output Current | 1.25A continuous - sufficient for core logic or RF power stages in handheld devices; peak inductor current rated to 2.0A (typ). |
| Switching Frequency | 2.25MHz (typ) - enables use of sub-1.2μH inductors and small 22μF ceramic capacitors, minimizing board area. |
| Quiescent Current | 20μA in Burst Mode - extends battery runtime in standby states (e.g., camera sleep mode), with ≤1μA in shutdown. |
| Feedback Reference | 0.6V ±2% - allows precise low-voltage outputs (e.g., 1.2V, 1.5V, 1.8V) using standard resistor ratios; line regulation <0.4%/V. |
| Efficiency | Up to 96% - achieved via synchronous rectification and low RDS(ON) switches; >85% maintained down to 1mA load in Burst Mode. |
| Thermal Resistance | θJA = 64°C/W (DFN-6) - enables 1.25A operation at +70°C ambient without forced airflow when PCB copper area is optimized. |
Pinout & Package
Package: 6-Lead (2mm × 3mm) Plastic DFN with exposed pad (Pin 7 = SGND). Thermal performance optimized for high-power density layouts; exposed pad must be soldered to PCB ground plane for θJA = 64°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Main power input | Accepts 2.5V–5.5V; requires ≥10μF ceramic decoupling close to pin to suppress high-frequency switching noise. |
| SW (Pin 1) | Switch node | Connects to inductor; carries high di/dt square-wave current; must be routed short and wide to minimize EMI and voltage spikes. |
| GND / PGND (Pin 2) | Power ground | Return path for CIN, COUT(–), and inductor; separate from signal ground to avoid noise coupling into feedback loop. |
| VFB (Pin 4) | Feedback input | Senses output via resistive divider; high-impedance (±30nA bias) - sensitive to noise; route away from SW and VIN traces. |
| RUN (Pin 6) | Enable control | Active-high logic: >1.5V enables regulation; <0.3V forces shutdown (<1μA IQ); must not float. |
| SGND (Pins 5, 7) | Signal ground | Reference for VFB, RUN, and internal error amp; connect all small-signal components (R1/R2, CF) here-not to PGND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous power stage | Eliminates external Schottky diode and reduces conduction loss by >30% vs. asynchronous designs at 1.25A. |
| 100% duty-cycle operation | Extends battery life in dropout: maintains regulation down to VIN ≈ VOUT + ILOAD × RDS(ON)P, critical for Li-Ion end-of-discharge. |
| Burst Mode efficiency optimization | Maintains >85% efficiency at 1mA load by gating entire power stage, unlike pulse-skipping which degrades regulation. |
| Low-noise current-mode control | Provides fast transient response (<20μs recovery from 0→1.25A step) with minimal output voltage deviation (±100mV). |
| Robust thermal protection | Overtemperature shutdown at ~150°C junction temperature prevents damage during sustained overload or poor heatsinking. |
Applications
| Digital Still Cameras | Wireless Modems |
|---|---|
Use Scenario: Powering image sensor and ISP core requiring stable 1.2V/1.8V rails during burst capture and video streaming. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.25A with <100mV load transient deviation and <20μs recovery. Use Value: Burst Mode extends standby time between shots; 2.25MHz switching avoids interference with image sensor clock domains. |
Use Scenario: Supplying baseband processor and RF transceiver in LTE/5G modem modules with dynamic load profiles. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting rapid load transitions (10mA ↔ 1.2A) during data transmission bursts. Use Value: 20μA quiescent current minimizes idle power; synchronous topology ensures >90% efficiency across full load range. |
| Portable Media Players | Point-of-Load Regulation |
Use Scenario: Generating clean 1.5V core voltage for audio DSP and NAND flash controller in battery-powered players. IC Role / Device Role / Timing Role: Low-noise DC/DC regulator with 0.6V reference enabling precise low-voltage outputs and remote sensing. Use Value: Ceramic capacitor compatibility eliminates ESR-related ripple; DFN-6 footprint saves space in slim form factors. |
Use Scenario: Local regulation for FPGA I/O banks or microcontroller peripherals requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Compact, thermally efficient synchronous buck providing 1.25A at 1.8V/2.5V with minimal layout overhead. Use Value: Exposed-pad DFN package enables direct thermal coupling to PCB plane; no external MOSFETs simplify BOM and layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3V–17V input; 3A output; 2.25MHz switching; 17μA quiescent current; different pinout and enable threshold (1.2V). | Better suited for higher-input industrial rails; lacks 100% duty cycle and same low-VIN optimization for Li-Ion. | Select if input exceeds 5.5V or output current >1.25A is required; verify PCB layout compatibility. |
| MAX17503GCU+T | 4.5V–60V input; 2.5A output; 100kHz–2.2MHz programmable frequency; 120μA quiescent current; external MOSFETs. | Designed for wide-input industrial/motor drives; higher IQ and external FETs increase solution size and cost. | Choose for high-voltage inputs (>12V) or where adjustable frequency aids EMI compliance; not drop-in for portable Li-Ion. |
Compared with TPS62130ARGTR and MAX17503GCU+T, the LTC3564IDCB#TRMPBF offers superior light-load efficiency and Li-Ion-specific features (100% duty cycle, 2.5V min input, 20μA IQ) in a smaller DFN-6 package-making it optimal for space-constrained, battery-critical applications where input stays below 5.5V.
Availability
LTC3564IDCB#TRMPBF is available at Aetrix Electronics and suitable for digital still cameras, wireless modems, and portable media players requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to 125°C junction temperature.
Supply support for LTC3564IDCB#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3564 belongs to Linear's monolithic synchronous buck regulator product line, designed specifically for ultra-low-power portable electronics requiring high efficiency across wide load ranges and compact 2mm × 3mm packaging.
FAQ
What is the maximum output current capability of the LTC3564IDCB#TRMPBF?
The LTC3564IDCB#TRMPBF delivers up to 1.25A continuous output current under typical conditions (TA ≤ 85°C, proper PCB thermal design). Peak inductor current is rated to 2.0A (typ), but sustained operation above 1.25A requires derating based on thermal analysis using θJA = 64°C/W and ambient temperature.
Does the LTC3564IDCB#TRMPBF require an external Schottky diode?
No, the LTC3564IDCB#TRMPBF does not require an external Schottky diode. It integrates both P-channel main and N-channel synchronous rectifier MOSFETs, enabling >95% efficiency and eliminating diode forward-voltage losses and associated thermal management.
What package type and thermal characteristics apply to the LTC3564IDCB#TRMPBF?
The LTC3564IDCB#TRMPBF uses a 6-lead (2mm × 3mm) plastic DFN package with exposed thermal pad (Pin 7 = SGND). Its thermal resistance is θJA = 64°C/W when mounted on a 2-layer PCB with 1-in² copper pour, enabling 1.25A operation at +70°C ambient without forced cooling.
How does Burst Mode operation improve efficiency at light loads in the LTC3564IDCB#TRMPBF?
In Burst Mode, the LTC3564IDCB#TRMPBF disables switching and most internal circuitry between energy bursts, reducing quiescent current to 20μA. Each burst delivers just enough energy to maintain regulation, minimizing switching and gate-drive losses-critical for extending battery life in standby modes of portable devices.
Can the LTC3564IDCB#TRMPBF operate with input voltage equal to the output voltage?
Yes, the LTC3564IDCB#TRMPBF supports 100% duty-cycle operation, allowing it to maintain regulation when VIN approaches VOUT. In this dropout condition, output voltage equals VIN minus ILOAD × RDS(ON)P, making it ideal for maximizing runtime near end-of-life in single-cell Li-Ion systems.
LTC3564IDCB#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:
- 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:
- 1.25A
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x3)
LTC3564IDCB#TRMPBF FAQ
1.How can I place an order for LTC3564IDCB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3564IDCB#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 LTC3564IDCB#TRMPBF reliable?
The price and inventory of LTC3564IDCB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3564IDCB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3564IDCB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3564IDCB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3564IDCB#TRMPBF?
LTC3564IDCB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3564IDCB#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 LTC3564IDCB#TRMPBF?
For technical support, including LTC3564IDCB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3564IDCB#TRMPBF requirements.
6.How does Aetrix verify that LTC3564IDCB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3564IDCB#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 LTC3564IDCB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3564IDCB#TRMPBF?
All LTC3564IDCB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3564IDCB#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 LTC3564IDCB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3564IDCB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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