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Analog Devices Inc. LTC3564EDCB#TRMPBF
- Part No.:
- LTC3564EDCB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3564EDCB#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
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Product details
Overview
LTC3564EDCB#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, constant-frequency, current-mode synchronous step-down DC/DC regulator optimized for single Li-Ion or 3.3V–5.5V input systems. It delivers up to 1.25A output current with 96% peak efficiency, 20μA quiescent current in active mode, and ≤1μA shutdown current-enabling extended battery life in portable instrumentation and media players.
For engineers reviewing the LTC3564EDCB#TRMPBF datasheet, LTC3564EDCB#TRMPBF pinout, LTC3564EDCB#TRMPBF application, or LTC3564EDCB#TRMPBF equivalent, key selection criteria include its 2.25MHz fixed switching frequency (enabling compact 1.1μH inductors), 0.6V feedback reference (supporting 0.6V–5.5V adjustable outputs), 100% duty-cycle dropout operation, and integrated P/N-channel MOSFETs eliminating external Schottky diodes.
Technical Context
The LTC3564EDCB#TRMPBF employs a patented current-mode control architecture with internal slope compensation that maintains stable operation across all duty cycles-including >40%-without reducing peak inductor current. Its Burst Mode® operation dynamically disables power switches during light loads, reducing supply current to 20μA while sustaining regulation.
Thermal performance is enhanced by the exposed-pad 6-lead DFN package (θJA = 64°C/W), supporting continuous 1.25A output at ambient temperatures up to 70°C in dropout conditions. Overtemperature protection disables both switches if junction temperature exceeds ~150°C, preventing thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion (2.7–4.2V) and fixed 3.3V/5V rails without external regulators. |
| Output Current | 1.25A continuous - sufficient for core logic, RF transceivers, and display drivers in handheld devices. |
| Switching Frequency | 2.25MHz (typ.) - enables use of sub-1.2μH shielded inductors and low-ESR ceramic capacitors for minimal board area. |
| Feedback Reference | 0.6V ±2% - allows precise low-voltage outputs (e.g., 1.2V, 1.8V) with standard resistor dividers; line regulation <0.4%/V. |
| Quiescent Current | 20μA (active), ≤1μA (shutdown) - extends runtime in standby modes common in cellular phones and digital cameras. |
| RDS(ON) (P/N-FET) | 0.15Ω (both channels, DFN package) - minimizes conduction loss at full load; validated at TJ = 25°C and 70°C. |
| Operating Temperature | –40°C to +125°C junction - qualified for industrial and automotive cabin applications requiring robust thermal margin. |
Pinout & Package
Package: 6-lead (2mm × 3mm) plastic DFN with exposed thermal pad (Pin 7 = SGND). Requires soldering exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SW | Switch Node | Connection to inductor; carries high di/dt square-wave current; must be routed short and wide to minimize EMI and voltage spikes. |
| 2: PGND | Power Ground | Main return path for inductor current and output capacitor; connects to (–) terminals of CIN and COUT. |
| 3: VIN | Main Input Supply | Accepts 2.5–5.5V; requires ≥10μF ceramic decoupling placed adjacent to pin to suppress high-frequency noise. |
| 4: VFB | Feedback Input | Senses output voltage via resistive divider; high-impedance (±30nA bias) node requiring guard ring and separation from SW. |
| 5: RUN | Enable Control | Active-high logic input; >1.5V enables regulation, <0.3V forces shutdown (≤1μA IQ); must not float. |
| 6: SGND | Signal Ground | Reference for VFB, RUN, and internal error amplifier; separate from PGND to avoid noise coupling into control loop. |
| 7: Exposed Pad | Signal Ground (SGND) | Thermally and electrically tied to SGND; mandatory solder connection to PCB thermal plane for θJA = 64°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Reduces quiescent current to 20μA at light loads while maintaining tight output regulation-critical for always-on sensors and sleep-state peripherals. |
| 100% Duty-Cycle Dropout | Enables VOUT regulation down to VIN – ILOAD×RDS(ON), extending usable battery range below 3.0V in Li-ion systems. |
| No External Schottky Diode | Integrated synchronous N-channel MOSFET eliminates forward-voltage drop and thermal losses associated with discrete diodes. |
| Current-Mode Control | Provides inherent cycle-by-cycle current limiting and superior transient response to load steps (e.g., 0→1.25A in <20μs). |
| Overtemperature Protection | Shuts down both power switches when TJ ≈ 150°C, preventing damage during sustained overload or poor heatsinking. |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor cores and RF front-end ICs from a single Li-Ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.2V/1.8V at up to 1.25A with fast load-transient response. Use Value: Burst Mode® extends talk time by minimizing no-load current; 2.25MHz switching avoids AM radio band interference. |
Use Scenario: Generating stable 3.3V rail for Wi-Fi/Bluetooth SoCs and Ethernet PHYs in compact DSL/wireless modems. IC Role / Device Role / Timing Role: High-efficiency buck converter interfacing between 5V adapter input and low-voltage digital subsystems. Use Value: 96% peak efficiency reduces thermal load in sealed enclosures; small DFN footprint saves space on dense modem PCBs. |
| Digital Still Cameras | Portable Instruments |
Use Scenario: Supplying image sensor analog front-end (AFE) and ISP processors during burst capture mode. IC Role / Device Role / Timing Role: Low-noise, high-current regulator with tight load regulation (<0.5%) to prevent image artifacts. Use Value: 0.6V reference enables precise 2.8V AFE bias; 100% duty cycle sustains output as battery discharges to 2.8V. |
Use Scenario: Powering microcontroller, ADC, and LCD driver in handheld multimeters or gas detectors. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete buck controllers + MOSFETs, simplifying BOM and layout. Use Value: 20μA quiescent current enables multi-year battery life in low-duty-cycle measurement instruments. |
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 | 2.5V–6V input, 3A output, 2.5MHz switching, 17μA IQ; uses different current-sense method and lacks Burst Mode®. | Higher output current but larger 16-pin QFN package; better suited for higher-power industrial sensors than ultra-portable devices. | Select when >1.25A load or wider input range (up to 6V) is required; verify loop stability with ceramic output caps. |
| MAX17503GCU+T | 4.5V–60V input, 2.5A output, 100kHz–2.2MHz programmable frequency, 100μA IQ; includes PMBus interface. | Designed for wide-input industrial/automotive systems-not optimized for Li-ion battery voltage ranges or ultra-low IQ. | Choose for high-input-voltage applications (e.g., 24V bus) where remote monitoring and fault logging are needed. |
Compared with TPS62130ARGTR and MAX17503GCU+T, the LTC3564EDCB#TRMPBF offers superior light-load efficiency via Burst Mode®, smaller DFN footprint, and tighter integration for battery-powered portables-but delivers lower max current and narrower input range.
Availability
LTC3564EDCB#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital still cameras, and portable instruments requiring stable component supply with guaranteed long-term availability.
Supply support for LTC3564EDCB#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) designs precision analog, mixed-signal, and power management ICs for high-reliability applications.
The LTC3564EDCB#TRMPBF belongs to Linear's high-efficiency monolithic DC/DC regulator product line, engineered specifically for space-constrained, battery-operated portable electronics demanding ultralow quiescent current and seamless dropout operation.
FAQ
What is the maximum output current capability of the LTC3564EDCB#TRMPBF?
The LTC3564EDCB#TRMPBF delivers up to 1.25A continuous output current under typical conditions (TA ≤ 70°C, 2.25MHz switching, proper PCB thermal design). Peak inductor current capability is 2.0A (typ.), but sustained 1.25A requires adequate copper area on the exposed pad and low-thermal-resistance layout per the DFN package guidelines.
Does the LTC3564EDCB#TRMPBF require an external Schottky diode?
No. The LTC3564EDCB#TRMPBF integrates both P-channel (high-side) and N-channel (low-side) synchronous MOSFETs, eliminating the need for an external Schottky diode. This improves efficiency by removing the 0.3–0.5V forward voltage drop and associated thermal dissipation.
What is the purpose of the exposed thermal pad (Pin 7) on the LTC3564EDCB#TRMPBF DFN package?
The exposed pad on the LTC3564EDCB#TRMPBF is electrically and thermally connected to SGND. It must be soldered to a dedicated PCB copper pour tied to signal ground to achieve the specified θJA = 64°C/W and ensure reliable operation at full load. Omitting this connection degrades thermal performance and risks overtemperature shutdown.
Can the LTC3564EDCB#TRMPBF operate with input voltages below 2.5V?
No. The absolute minimum input voltage for the LTC3564EDCB#TRMPBF is 2.5V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this threshold may cause improper regulation, increased RDS(ON), or failure to start. For sub-2.5V inputs, consider alternative regulators like the LTC3563 or LTC3642.
How does Burst Mode® operation improve efficiency in the LTC3564EDCB#TRMPBF?
Burst Mode® in the LTC3564EDCB#TRMPBF disables the main and synchronous MOSFETs and most internal circuitry during light loads, reducing quiescent current to 20μA. Output voltage is maintained by energy stored in COUT, with periodic short bursts of switching only when VOUT droops beyond regulation limits-extending battery runtime in standby states.
LTC3564EDCB#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)
LTC3564EDCB#TRMPBF FAQ
1.How can I place an order for LTC3564EDCB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3564EDCB#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 LTC3564EDCB#TRMPBF reliable?
The price and inventory of LTC3564EDCB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3564EDCB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3564EDCB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3564EDCB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3564EDCB#TRMPBF?
LTC3564EDCB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3564EDCB#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 LTC3564EDCB#TRMPBF?
For technical support, including LTC3564EDCB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3564EDCB#TRMPBF requirements.
6.How does Aetrix verify that LTC3564EDCB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3564EDCB#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 LTC3564EDCB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3564EDCB#TRMPBF?
All LTC3564EDCB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3564EDCB#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 LTC3564EDCB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3564EDCB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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