My Inquiry
My Account
Analog Devices Inc. LTC3564EDCB#TRPBF
- Part No.:
- LTC3564EDCB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3564EDCB#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,526
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3564EDCB#TRPBF 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 electronics. Its 2.25MHz switching frequency supports compact 1.1μH inductors and ceramic capacitors.
For engineers reviewing the LTC3564EDCB#TRPBF datasheet, LTC3564EDCB#TRPBF pinout, LTC3564EDCB#TRPBF application, or LTC3564EDCB#TRPBF equivalent, key selection considerations include its 0.6V feedback reference for low-output-voltage designs (e.g., 1.2V–1.8V core rails), 100% duty-cycle dropout operation, integrated P/N-channel MOSFETs eliminating external Schottky diodes, and thermal performance in the 6-lead DFN (2mm × 3mm, 1mm height) package.
Technical Context
The LTC3564EDCB#TRPBF employs a constant-frequency current-mode control architecture with internal slope compensation to prevent subharmonic oscillation at high duty cycles (>40%). Its patented scheme maintains full 1.25A peak inductor current capability across all duty cycles without reduction due to compensation ramping.
Burst Mode® operation enables automatic transition to low-quiescent-current sleep state (~20μA) under light loads, while maintaining tight output regulation via feedback error amplifier monitoring of the 0.6V reference. Overtemperature protection disables both power switches when junction temperature exceeds ~150°C, and short-circuit protection extends bottom-FET conduction to safely decay inductor current during output faults.
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) and fixed 3.3V/5V rails without external LDO pre-regulation. |
| Output Current | 1.25A continuous - sufficient for processor cores, RF transceivers, or FPGA I/O banks in space-constrained portable designs. |
| Switching Frequency | 2.25MHz (typ.) - enables use of sub-2mm-height, 1μH–1.1μH inductors and small 22μF ceramic output capacitors. |
| Feedback Reference | 0.6V ±2% - allows precise setting of output voltages as low as 0.6V using standard resistor dividers (e.g., 1.8V with 316k/100k). |
| Quiescent Current | 20μA (active), ≤1μA (shutdown) - minimizes no-load battery drain in always-on subsystems like RTC or sensor hubs. |
| Efficiency Peak | 96% - achieved at mid-load (e.g., 500mA @ 1.8V out, 3.6V in), reducing thermal load and PCB area vs. lower-efficiency alternatives. |
| Duty Cycle Limit | 100% - sustains regulation down to VIN ≈ VOUT + ILOAD×RDS(ON), critical for battery end-of-discharge operation. |
| Package Thermal Resistance | θJA = 64°C/W (DFN) - enables higher power delivery than TSOT-23 (θJA = 215°C/W) in thermally constrained layouts. |
Pinout & Package
Package: 6-Lead (2mm × 3mm) Plastic DFN with exposed pad (Pin 7 = SGND), 1mm profile, RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: SW | Switch Node | Connection to drains of internal P- and N-channel MOSFETs; carries high di/dt square-wave current - requires short, wide trace and adjacent ground pour. |
| Pin 2: PGND | Main Power Ground | Return path for high-current inductor and output capacitor; must be tied directly to COUT(–) and CIN(–) to minimize voltage spikes. |
| Pin 3: VIN | Main Input Supply | Connects to input capacitor (≥10μF ceramic); decoupling must be placed within 2mm to suppress high-frequency noise and gate charge transients. |
| Pin 4: VFB | Feedback Input | Senses resistive divider output; high-impedance node (±30nA bias) - route away from SW and RUN to avoid coupling-induced regulation error. |
| Pin 5: RUN | Enable Control | Logic-level input: >1.5V enables regulation, <0.3V forces shutdown (≤1μA IQ); must not float - tie to VIN or microcontroller GPIO with pull-up if unused. |
| Pin 6: SGND | Signal Ground | Reference for VFB, RUN, and internal error amplifier; connect all feedback resistors, compensation components, and bypass caps to this pin only - isolate from PGND except at single-point star ground. |
| Pin 7 (Exposed Pad): SGND | Thermal & Signal Ground | Must be soldered to ≥200mm² PCB copper area for thermal dissipation and low-noise signal return; electrically connected to Pin 6. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Synchronous Power Stage | P-channel main switch (RDS(ON) = 0.15Ω typ.) + N-channel synchronous rectifier (RDS(ON) = 0.15Ω typ.) eliminate external Schottky diode, reducing BOM count and forward-drop losses. |
| Burst Mode® Operation | Automatically engages below ~300mA load to reduce IQ to 20μA while maintaining ±1% output regulation - extends runtime in standby/sleep states without manual enable control. |
| 100% Duty-Cycle Dropout | Enables regulation down to VIN = VOUT + ILOAD×RDS(ON); critical for Li-Ion applications where battery voltage drops to 2.7V while powering 1.8V logic rails. |
| Stable Ceramic Output Capacitor Support | No ESR dependency in control loop - allows use of low-ESR, high-RMS-current X5R/X7R ceramics (e.g., 22μF) for minimal output ripple (<10mVpp) and footprint savings. |
| Robust Protection Suite | Includes overtemperature shutdown (TJ ≈ 150°C), short-circuit current limiting via extended bottom-FET conduction, and absolute maximum ratings covering –0.3V to 6V on all pins. |
| Low-Noise Layout Optimization | Dual-ground architecture (PGND/SGND) with dedicated SGND pin and exposed-pad grounding separates high-current and sensitive analog paths - reduces switching noise coupling into feedback loop. |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
|
Use Scenario: Powering baseband processor core (1.2V/1.8V) and RF transceiver (2.8V) from single Li-Ion battery (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated, low-noise DC supply with fast transient response to handle burst-mode data transmission. Use Value: 96% efficiency at 500mA and 20μA quiescent current extend talk time by >15% vs. legacy 85%-efficient regulators; 2.25MHz switching avoids AM radio band interference. |
Use Scenario: Generating 1.8V I/O and 1.2V core rails for LTE/Wi-Fi SoC in compact USB-powered modem dongles. IC Role / Device Role / Timing Role: Compact, high-frequency DC/DC converter enabling <100mm² total solution size with integrated MOSFETs and ceramic passives. Use Value: 6-lead DFN package (2mm × 3mm) and 1.1μH inductor reduce board area by 40% vs. discrete solutions; Burst Mode® cuts idle power to <10μW. |
| Digital Still Cameras | Portable Instruments |
|
Use Scenario: Supplying image sensor analog front-end (2.8V) and digital ISP core (1.2V) during high-speed burst capture with rapid load transients. IC Role / Device Role / Timing Role: Current-mode regulator providing <50μs load-step recovery (100mA→1.25A) and <100mV overshoot to maintain sensor linearity. Use Value: Fast transient response prevents image artifacts; 100% duty cycle sustains 2.8V output even as battery sags to 2.9V during flash discharge. |
Use Scenario: Powering precision ADCs, op-amps, and microcontrollers in handheld multimeters or gas analyzers operating from 3x AAA batteries (4.5V nominal). IC Role / Device Role / Timing Role: High-accuracy, low-drift voltage regulator with 0.6V reference tolerance (±2%) and <0.5% load regulation for stable analog measurement references. Use Value: 0.6V reference enables direct 1.2V/1.8V generation with <0.5% total error; ≤1μA shutdown current preserves battery for multi-year shelf life. |
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-mode control without slope compensation. | Higher output current but larger 16-pin QFN (3mm × 2mm); lacks 100% duty cycle - unsuitable for deep Li-Ion dropout. | Select when >1.25A load or tighter input range (up to 6V) is required; verify loop stability with ceramic output caps. |
| MAX17503ATP+ | 4.5V–60V input, 2.5A output, 100kHz–2.2MHz programmable frequency, 100μA IQ; includes PMBus interface and extensive fault reporting. | Industrial-grade wide-input regulator; significantly higher quiescent current and larger 20-pin TQFN - over-specified for portable Li-Ion apps. | Choose for high-input industrial systems requiring telemetry and robust fault handling; not recommended for battery life-critical designs. |
Compared with TPS62130ARGTR and MAX17503ATP+, the LTC3564EDCB#TRPBF offers superior light-load efficiency (20μA vs. 17–100μA), guaranteed 100% duty cycle for battery sag support, and smallest footprint among 1.25A-class regulators - making it optimal for space- and runtime-constrained portable electronics.
Availability
LTC3564EDCB#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, and portable instruments requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3564EDCB#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving aerospace, industrial, automotive, and communications markets.
The LTC3564EDCB#TRPBF belongs to Linear's µPower synchronous buck regulator family, designed specifically for ultra-low-power portable electronics where battery runtime, small solution size, and seamless dropout operation are critical system requirements.
FAQ
What is the maximum output current capability of the LTC3564EDCB#TRPBF?
The LTC3564EDCB#TRPBF delivers up to 1.25A continuous output current under typical conditions (TA = 25°C, 2.25MHz switching, 3.6V input, 1.8V output). Derating applies at elevated ambient temperatures or high duty cycles; for example, at 70°C ambient and 2.7V input (100% duty cycle), thermal limits reduce practical output to ~1.0A in the DFN package due to RDS(ON) increase and θJA = 64°C/W.
Does the LTC3564EDCB#TRPBF require an external Schottky diode?
No, the LTC3564EDCB#TRPBF does not require an external Schottky diode. It integrates both a P-channel main switch and an N-channel synchronous rectifier, eliminating body-diode conduction losses and enabling efficiencies up to 96%. This integration reduces component count, board area, and thermal stress compared to asynchronous buck converters.
What is the function of the exposed pad (Pin 7) on the LTC3564EDCB#TRPBF DFN package?
The exposed pad (Pin 7) on the LTC3564EDCB#TRPBF is electrically connected to SGND and serves dual purposes: thermal dissipation (reducing θJA to 64°C/W) and low-impedance signal grounding. It must be soldered to a ≥200mm² PCB copper area tied exclusively to the SGND net - not PGND - to maintain noise isolation for the feedback amplifier and RUN comparator.
How does Burst Mode® operation improve efficiency in the LTC3564EDCB#TRPBF?
Burst Mode® operation in the LTC3564EDCB#TRPBF reduces quiescent current to 20μA at light loads (<300mA) by disabling the power MOSFETs and non-essential circuitry between energy bursts. Each burst delivers just enough charge to maintain output regulation, minimizing switching and gate-drive losses. This extends battery runtime in standby modes without compromising transient response when load steps occur.
Can the LTC3564EDCB#TRPBF operate with a 2.5V input supply?
Yes, the LTC3564EDCB#TRPBF supports a minimum input voltage of 2.5V, enabling operation down to the end-of-discharge voltage of Li-Ion cells (~2.7V) and compatibility with low-voltage systems. At 2.5V input and 1.8V output, it achieves 100% duty cycle to sustain regulation, though power dissipation increases due to higher RDS(ON) - thermal design must verify junction temperature remains ≤125°C.
LTC3564EDCB#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:
- 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#TRPBF FAQ
1.How can I place an order for LTC3564EDCB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3564EDCB#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 LTC3564EDCB#TRPBF reliable?
The price and inventory of LTC3564EDCB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3564EDCB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3564EDCB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3564EDCB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3564EDCB#TRPBF?
LTC3564EDCB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3564EDCB#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 LTC3564EDCB#TRPBF?
For technical support, including LTC3564EDCB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3564EDCB#TRPBF requirements.
6.How does Aetrix verify that LTC3564EDCB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3564EDCB#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 LTC3564EDCB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3564EDCB#TRPBF?
All LTC3564EDCB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3564EDCB#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 LTC3564EDCB#TRPBF part is unused and in its original packaging.
Return procedure for LTC3564EDCB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3564EDCB#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
