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Analog Devices Inc. LTC3564ES5#TRPBF
- Part No.:
- LTC3564ES5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3564ES5#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:678
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Product details
Overview
LTC3564ES5#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, constant-frequency synchronous step-down DC/DC regulator in a 5-lead TSOT-23 package. 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, low-voltage power supplies for portable Li-Ion battery systems.
For engineers reviewing the LTC3564ES5#TRPBF datasheet, LTC3564ES5#TRPBF pinout, LTC3564ES5#TRPBF application, or LTC3564ES5#TRPBF equivalent, key selection criteria include quiescent current (20μA active / ≤1μA shutdown), 100% duty-cycle dropout operation, internal MOSFET RDS(ON) (0.15Ω P-ch / 0.15Ω N-ch), Burst Mode® efficiency at light loads, and thermal performance in thin-profile portable layouts.
Technical Context
The LTC3564ES5#TRPBF employs a current-mode, constant-frequency architecture with integrated P-channel main and N-channel synchronous switches. Its patented slope compensation maintains full inductor peak current capability (>1.5A) across all duty cycles, including 100% dropout operation.
Burst Mode® operation enables automatic transition between continuous switching and intermittent pulse bursts, reducing supply current to 20μA at light loads while preserving fast line/load transient response via current-mode control and internal error amplifier with 0.6V reference.
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 core logic, RF transceivers, or display drivers in space-constrained handhelds. |
| Switching Frequency | 2.25MHz (typ) - enables use of sub-1.2μH inductors and small ceramic capacitors, minimizing PCB footprint. |
| Quiescent Current | 20μA (active), ≤1μA (shutdown) - extends battery runtime in standby/sleep modes of cellular phones and media players. |
| Feedback Reference | 0.6V ±2% - allows precise regulation down to 0.6V output (e.g., 1.2V, 1.5V, 1.8V) using standard resistor ratios. |
| Efficiency Peak | 96% - achieved at mid-load with optimized inductor and ceramic caps; >85% maintained from 1mA to 1.25A. |
| Thermal Resistance θJA | 215°C/W (TSOT-23) - requires careful layout and thermal vias for >500mA continuous operation at 70°C ambient. |
Pinout & Package
Package: 5-Lead Plastic TSOT-23 (0.95mm height, 1mm profile), RoHS-compliant, tape-and-reel (TRPBF).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VFB (Pin 1) | Feedback Input | Connects to resistive divider midpoint; regulates output by comparing against 0.6V internal reference. |
| GND (Pin 2) | Power Ground | Return path for VIN decoupling capacitor and output capacitor negative terminal; must be low-impedance. |
| VIN (Pin 3) | Main Supply Input | Accepts 2.5V–5.5V; requires ≥10μF ceramic decoupling placed adjacent to pin for high-frequency current sourcing. |
| SW (Pin 4) | Switch Node | Drain connection of internal P-ch and N-ch MOSFETs; routes high di/dt currents to inductor; keep trace short and away from VFB. |
| RUN (Pin 5) | Enable Control | Logic-level input: >1.5V enables regulation; <0.3V forces shutdown (≤1μA IQ); must not float. |
Key Features
| Feature | Design Value |
|---|---|
| No external Schottky diode required | Integrated synchronous N-channel MOSFET eliminates conduction loss and board area for discrete diode. |
| 100% duty cycle operation | Enables ultra-low dropout (e.g., 2.7VIN → 2.5VOUT) without output collapse, extending usable battery voltage range. |
| Burst Mode® operation | Reduces quiescent current to 20μA at light loads while maintaining <100mV load transient deviation (1.25A step). |
| Overtemperature protection | Thermal shutdown activates at ~150°C junction temperature; device resumes operation after cooldown. |
| Low-profile TSOT-23 package | 1mm height enables integration into slim handhelds (e.g., digital cameras, media players) without mechanical interference. |
Applications
| Cellular Telephones | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver from single Li-Ion cell (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.2V/1.8V/2.5V core and I/O rails with dynamic voltage scaling support. Use Value: 96% peak efficiency and 20μA quiescent current directly extend talk time and standby duration. |
Use Scenario: Regulating power for LTE/Wi-Fi/BT combo modules in compact USB dongles or embedded gateways. IC Role / Device Role / Timing Role: Point-of-load converter providing stable 3.3V or 1.8V to radio ICs with minimal EMI impact on sensitive analog front-ends. Use Value: 2.25MHz switching avoids AM/FM and cellular bands; small 1.1μH inductor fits tight USB form factor. |
| Digital Still Cameras | Portable Instruments |
Use Scenario: Supplying image sensor, ISP, and LCD backlight driver from dual-cell or boosted single-cell source. IC Role / Device Role / Timing Role: High-transient-response buck regulator handling pulsed 1.25A sensor readout current without output droop. Use Value: Current-mode control ensures <20μs recovery from 100mA→1.25A load steps; 100% duty cycle sustains output during battery sag. |
Use Scenario: Powering microcontroller, ADC, and wireless transceiver in handheld test equipment (e.g., multimeters, gas detectors). IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator enabling >100-hour battery life in always-on monitoring mode. Use Value: ≤1μA shutdown current preserves battery during storage; 0.6V reference supports precision 2.048V or 4.096V reference rail generation. |
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 |
|---|---|---|---|
| TPS62231DRYR | 2.25MHz, 1.2A, 0.6V ref, but only 2.05V–6.0V input; no Burst Mode®, higher 25μA IQ. | Less suitable for deep Li-Ion discharge (below 2.5V); lower light-load efficiency in battery-critical apps. | Prefer LTC3564ES5#TRPBF when operating down to 2.5V input or requiring <20μA quiescent current. |
| MAX8640YETA+ | 3MHz, 1.2A, 0.6V ref, 2.6V–5.5V input; uses external compensation; no integrated soft-start. | Requires additional external components; less optimized for ultra-compact layouts due to compensation network. | Choose LTC3564ES5#TRPBF for simplified design, smaller footprint, and guaranteed soft-start (0.9ms typ). |
Compared with TPS62231DRYR and MAX8640YETA+, the LTC3564ES5#TRPBF offers superior low-input-voltage operation (2.5V min), lowest active quiescent current (20μA), and fully integrated Burst Mode®-making it optimal for long-runtime, space-constrained Li-Ion systems where input voltage sags below 2.7V.
Availability
LTC3564ES5#TRPBF 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 manufacturability and consistent parametric performance.
Supply support for LTC3564ES5#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 industrial, automotive, communications, and consumer markets.
The LTC3564ES5#TRPBF belongs to Linear's µPower synchronous buck regulator family, designed specifically for ultra-low-power, high-density portable electronics where battery life, board area, and thermal constraints dominate system architecture.
FAQ
What is the maximum output current capability of the LTC3564ES5#TRPBF?
The LTC3564ES5#TRPBF delivers up to 1.25A continuous output current under typical conditions (TA = 25°C, 2.25MHz, 3.6VIN→1.8VOUT). Peak inductor current capability exceeds 1.5A, but sustained 1.25A requires proper thermal management-especially in the TSOT-23 package where θJA = 215°C/W limits power dissipation at elevated ambient temperatures.
Does the LTC3564ES5#TRPBF require an external Schottky diode?
No, the LTC3564ES5#TRPBF does not require an external Schottky diode. It integrates both a P-channel main switch and an N-channel synchronous rectifier, eliminating conduction losses and board space associated with discrete diodes-enabling higher efficiency and simpler layout compared to asynchronous buck regulators.
What is the function of the RUN pin on the LTC3564ES5#TRPBF?
The RUN pin on the LTC3564ES5#TRPBF is a logic-controlled enable input. Driving RUN above 1.5V enables regulation; pulling RUN below 0.3V places the device in shutdown mode, reducing supply current to ≤1μA. The pin must never be left floating-tie to VIN through a resistor or drive actively to ensure predictable startup and power sequencing.
Can the LTC3564ES5#TRPBF operate with input voltage as low as 2.5V?
Yes, the LTC3564ES5#TRPBF is fully specified to operate from 2.5V to 5.5V input. At 2.5V input, it supports 100% duty cycle to maintain regulated output down to VOUT = VIN – ILOAD × RDS(ON), making it ideal for deep-discharge Li-Ion battery operation where voltage drops below 2.7V.
How does Burst Mode® operation improve efficiency in the LTC3564ES5#TRPBF?
Burst Mode® operation in the LTC3564ES5#TRPBF reduces quiescent current to 20μA at light loads by intermittently enabling the power switches only when output voltage droop exceeds a threshold. This eliminates switching losses during idle periods while preserving fast transient response-extending battery runtime in standby modes of cellular phones and portable instruments without sacrificing regulation accuracy.
LTC3564ES5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- TSOT-23-5
LTC3564ES5#TRPBF FAQ
1.How can I place an order for LTC3564ES5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3564ES5#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 LTC3564ES5#TRPBF reliable?
The price and inventory of LTC3564ES5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3564ES5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3564ES5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3564ES5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3564ES5#TRPBF?
LTC3564ES5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3564ES5#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 LTC3564ES5#TRPBF?
For technical support, including LTC3564ES5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3564ES5#TRPBF requirements.
6.How does Aetrix verify that LTC3564ES5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3564ES5#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 LTC3564ES5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3564ES5#TRPBF?
All LTC3564ES5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3564ES5#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 LTC3564ES5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3564ES5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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