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Analog Devices Inc. LTC3565IMSE#TRPBF
- Part No.:
- LTC3565IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3565IMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,826
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Product details
Overview
LTC3565IMSE#TRPBF from Analog Devices (formerly Linear Technology) is a constant-frequency, synchronous step-down DC/DC converter optimized for medium-power portable applications. It operates from 2.5V to 5.5V input, delivers up to 1.25A output current, supports up to 4MHz switching frequency, and features adjustable output voltage from 0.6V to 5.5V. Its integrated P-channel and N-channel MOSFETs enable high-efficiency regulation in space-constrained devices such as digital cameras and cellular handsets.
For engineers reviewing the LTC3565IMSE#TRPBF datasheet, LTC3565IMSE#TRPBF pinout, LTC3565IMSE#TRPBF application, or LTC3565IMSE#TRPBF equivalent, key selection considerations include its 10-lead MSOP package with exposed pad, Burst Mode® operation (IQ = 40µA), 0.15Ω top-switch RDS(ON), ±7% PGOOD threshold, and support for pre-biased startup - all critical for battery-powered system efficiency and transient robustness.
Technical Context
The LTC3565IMSE#TRPBF employs a current-mode control architecture with external compensation via the ITH pin, enabling precise transient response tuning across load and output capacitor variations. Its oscillator frequency is programmable via an RT resistor or synchronizable to an external clock up to 4MHz, allowing optimization of size versus efficiency trade-offs.
Three selectable operating modes - Burst Mode®, pulse-skipping, and forced continuous conduction - are controlled by the SYNC/MODE pin voltage level. In dropout, the P-channel MOSFET operates at 100% duty cycle; shutdown draws <1µA. The device integrates undervoltage lockout (1.9V to 2.2V threshold) and short-circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH inputs without intermediate regulation. |
| Max Output Current | 1.25A - sufficient for core logic rails in handheld instruments and camera image sensors. |
| Switching Frequency | Up to 4MHz - enables use of sub-2mm-height inductors and low-ESR ceramic capacitors for ultra-compact PCB layouts. |
| Feedback Reference Voltage | 0.6V ±2% - sets output accuracy and allows precise scaling via external resistor divider. |
| RDS(ON) (Top Switch) | 0.15Ω (MSE package) - minimizes conduction loss at high load currents, improving thermal performance in 10-lead MSOP. |
| IQ (Burst Mode) | 40µA - extends battery runtime during light-load standby in portable electronics. |
| PGOOD Threshold | ±7% of VOUT - provides reliable power-rail monitoring for system sequencers and microcontroller reset circuits. |
Pinout & Package
Package: 10-Lead Plastic MSOP with exposed pad (Pin 11 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RT (Pin 1) | Oscillator timing resistor connection | Programs switching frequency from ~1.3MHz to 4MHz; open-circuit disables oscillator. |
| RUN (Pin 2) | Enable/disable control input | Logic-high (>1.5V) enables regulation; logic-low (<0.3V) forces shutdown with <1µA quiescent current. |
| SYNC/MODE (Pin 3) | Mode selection & external clock sync | Ground = pulse-skip; SVIN = Burst Mode®; SVIN/2 = forced continuous; external clock input enables synchronization. |
| SW (Pin 4) | Switch node | Connects to inductor; swings between PVIN and GND; requires low-inductance layout to minimize EMI. |
| GND (Pins 5 & 11) | Main power and thermal ground | Pins 5 and 11 must be connected to common PCB ground plane; exposed pad (Pin 11) is mandatory for thermal dissipation. |
| PVIN (Pin 6) | Main power supply input | High-current path for switch-side power; requires local 1–10µF ceramic decoupling close to pin. |
| SVIN (Pin 7) | Signal power supply | Bias source for internal circuitry; must be ≥ PVIN and decoupled independently to avoid noise coupling. |
| PGOOD (Pin 8) | Open-drain power-good indicator | Pulled low when VOUT deviates >±7% from regulation; used for system power sequencing and fault reporting. |
| VFB (Pin 9) | Output voltage feedback input | Compares divided VOUT against 0.6V reference; determines regulation setpoint and loop stability. |
| ITH (Pin 10) | Error amplifier compensation node | External RC network here sets loop bandwidth and phase margin; critical for load transient response tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P-channel (0.15Ω) and N-channel (0.13Ω) MOSFETs eliminate external diode, enabling >95% peak efficiency and reducing thermal footprint. |
| Burst Mode® operation | Reduces IQ to 40µA at light loads while maintaining regulated output - essential for extending battery life in always-on subsystems. |
| Pre-biased output startup | Supports safe start-up into pre-charged output capacitors without reverse current flow - required for hot-swap and multi-rail sequencing. |
| 100% duty-cycle dropout | Enables linear regulator-like behavior near VIN = VOUT, minimizing voltage drop and sustaining operation during brown-out conditions. |
| Stable with ceramic capacitors | No minimum ESR requirement simplifies filtering design and eliminates electrolytic/tantalum dependencies - improves reliability and reduces board area. |
Applications
| Digital Camera Power Management | Cellular Phone Baseband Supply |
|---|---|
|
Use Scenario: Regulating 1.8V or 2.8V rails for CMOS image sensors and ISP processors in compact camera modules. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering up to 1.25A with fast load-step response to handle burst capture current spikes. Use Value: 4MHz operation enables <2mm-height inductors and 0603/0805 ceramics, meeting strict height constraints in slim camera housings. |
Use Scenario: Generating stable 1.2V core voltage for baseband SoCs in LTE/5G smartphones under dynamic RF transmit/receive loads. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with Burst Mode® for sleep-state current reduction and forced continuous mode for RF-noise-sensitive operation. Use Value: ±7% PGOOD flag ensures reliable SoC reset signaling; pre-biased startup prevents bus contention during warm boot sequences. |
| Notebook Computer Subsystem Rail | Handheld Test Instrument Core Supply |
|
Use Scenario: Providing 3.3V or 5V auxiliary power for USB-C PD controllers, touch controllers, or display interface ICs in ultrabooks. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter operating from shared 5V rail with minimal external components. Use Value: 10-lead MSOP package with exposed pad achieves <40°C/W θJA, enabling silent fanless operation in thermally constrained chassis. |
Use Scenario: Delivering clean, regulated 1.5V or 1.8V to FPGA or microcontroller cores in portable multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Low-noise, high-transient-response DC/DC converter supporting rapid measurement sampling and real-time processing. Use Value: External compensation via ITH pin allows tuning for optimal response to 100mA–1.25A load steps typical in instrument auto-ranging functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3–17V input range; fixed 3.3V/5V options; 95% peak efficiency; 2.5MHz max fSW; no Burst Mode® (only PWM/pulse-skip) | Better suited for higher-input industrial rails; lacks pre-biased startup and 100% duty-cycle dropout | Select if input exceeds 5.5V or fixed-output simplicity is prioritized over ultra-low IQ and battery-optimized modes. |
| MAX17503GCU+T | 4.5–60V input; 2A output; 100kHz–2.2MHz fSW; integrated compensation; no exposed-pad MSOP package | Targeted at wide-input industrial/motor drives; larger 16-pin TQFN; higher thermal resistance (θJA ≈ 50°C/W) | Choose for high-voltage systems requiring ruggedness and integrated loop compensation, not portable low-voltage designs. |
Compared with TPS62130ARGTR and MAX17503GCU+T, the LTC3565IMSE#TRPBF uniquely combines 2.5V–5.5V input compatibility, 4MHz capability in a thermally enhanced MSOP, Burst Mode® IQ = 40µA, and pre-biased startup - making it the only option qualified for space- and battery-limited consumer portable applications requiring all four attributes.
Availability
LTC3565IMSE#TRPBF is available at Aetrix Electronics and suitable for digital camera power management, cellular phone baseband supply, and handheld test instrument core supply requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3565IMSE#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, communications, and industrial markets.
The LTC3565 belongs to Linear's high-frequency monolithic synchronous buck converter product line, designed specifically for compact, battery-powered portable electronics demanding high efficiency at light loads and minimal board area.
FAQ
What is the maximum supported switching frequency for the LTC3565IMSE#TRPBF?
The LTC3565IMSE#TRPBF supports up to 4MHz switching frequency, programmable via the RT resistor or synchronizable to an external clock. This 4MHz operation is guaranteed by design (not production-tested) and subject to duty-cycle limitations per the datasheet's fO(MAX) ≈ 6.67 × VOUT/VIN(MAX) constraint. At 1.8V output and 5.5V max input, the practical limit is ~2.2MHz.
Does the LTC3565IMSE#TRPBF support startup into a pre-biased output?
Yes, the LTC3565IMSE#TRPBF explicitly supports pre-biased output startup. Its internal circuitry prevents reverse current flow during start-up, allowing safe regulation into an already charged output capacitor - a critical feature for hot-swap and multi-rail power sequencing in portable systems using the LTC3565IMSE#TRPBF.
What is the thermal resistance (θJA) of the LTC3565IMSE#TRPBF in its MSOP package?
The LTC3565IMSE#TRPBF in the 10-lead plastic MSOP package has a junction-to-ambient thermal resistance (θJA) of 40°C/W, measured with the exposed pad (Pin 11) soldered to a 1-inch² copper area on a 2-layer PCB. This value assumes proper PCB layout per Linear's recommended footprint and thermal vias - essential for sustaining 1.25A output in ambient temperatures up to 85°C.
How does the SYNC/MODE pin configure operating modes on the LTC3565IMSE#TRPBF?
The SYNC/MODE pin on the LTC3565IMSE#TRPBF selects three distinct modes: grounding the pin enables pulse-skipping; connecting it to SVIN enables Burst Mode® (IQ = 40µA); biasing it to SVIN/2 enables forced continuous conduction. An external clock applied to this pin synchronizes switching and defaults to pulse-skip mode - all configurations directly impact ripple, efficiency, and EMI profile of the LTC3565IMSE#TRPBF.
What is the feedback reference voltage tolerance for the LTC3565IMSE#TRPBF?
The LTC3565IMSE#TRPBF has a feedback reference voltage (VFB) of 0.6V with a tolerance of ±2% (0.588V to 0.612V) over the full –40°C to 125°C junction temperature range. This tight tolerance ensures accurate output voltage regulation across environmental conditions and enables precise setpoints via standard 1% resistor dividers in final designs using the LTC3565IMSE#TRPBF.
LTC3565IMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 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:
- Up to 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3565IMSE#TRPBF FAQ
1.How can I place an order for LTC3565IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3565IMSE#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 LTC3565IMSE#TRPBF reliable?
The price and inventory of LTC3565IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3565IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3565IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3565IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3565IMSE#TRPBF?
LTC3565IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3565IMSE#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 LTC3565IMSE#TRPBF?
For technical support, including LTC3565IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3565IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3565IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3565IMSE#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 LTC3565IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3565IMSE#TRPBF?
All LTC3565IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3565IMSE#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 LTC3565IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3565IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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