My Inquiry
My Account
Analog Devices Inc. LTC3565IMSE#PBF
- Part No.:
- LTC3565IMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3565IMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 1.25A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:168
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3565IMSE#PBF from Analog Devices (formerly Linear Technology) is a 1.25A, 4MHz synchronous step-down DC/DC converter in a 10-lead MSOP package. It operates from 2.5V to 5.5V input, delivers adjustable output from 0.6V to 5.5V, and features Burst Mode operation (IQ = 40µA), 95% peak efficiency, and internal 0.15Ω P-channel / 0.13Ω N-channel MOSFETs - optimized for space-constrained battery-powered applications like digital cameras and handheld instruments.
For engineers reviewing the LTC3565IMSE#PBF datasheet, LTC3565IMSE#PBF pinout, LTC3565IMSE#PBF application, or LTC3565IMSE#PBF equivalent, key selection criteria include its 4MHz max switching frequency enabling sub-1mm-height magnetics, low-noise pulse-skip/forced-continuous mode control via SYNC/MODE pin, stable ceramic-capacitor operation, and guaranteed –40°C to 125°C industrial temperature range.
Technical Context
The LTC3565IMSE#PBF uses a constant-frequency current-mode architecture with external RT-resistor programmability (1.3–4MHz) or external clock synchronization. Its dual-power-rail design separates PVIN (main power switch supply) from SVIN (signal circuitry supply), requiring SVIN ≥ PVIN for proper biasing.
Control logic includes three selectable low-load modes: Burst Mode (40µA IQ), pulse-skipping, or forced continuous operation - each configured via voltage level on the SYNC/MODE pin. The device supports pre-biased output startup and enters 100% duty-cycle dropout when VIN approaches VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V rail inputs without external LDO pre-regulation. |
| Output Current | 1.25A continuous - sufficient for core logic, FPGA I/O banks, or sensor subsystems in portable electronics. |
| Switching Frequency | Up to 4MHz - enables use of 1.0–2.2µH inductors ≤1mm height and compact 10–22µF ceramic output capacitors. |
| Feedback Reference | 0.6V ±12mV - allows precise output setting down to 0.6V with standard resistor dividers; supports remote sensing. |
| Quiescent Current | 40µA in Burst Mode - extends battery runtime during standby or light-load sleep states. |
| Shutdown Current | <1µA - ensures negligible drain on primary battery during system off-state. |
| Efficiency | Up to 95% at 1.25A - achieved via low RDS(ON) internal switches (0.15Ω high-side, 0.13Ω low-side) and synchronous rectification. |
Pinout & Package
Package: 10-Lead Plastic MSOP (MSE), 3mm × 3mm footprint, exposed pad (Pin 11) tied to GND for thermal and electrical integrity. θJA = 40°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RT (Pin 1) | Oscillator timing resistor node | Connects to ground via resistor (e.g., 125kΩ for 1.5MHz); sets switching frequency per RT = 1.21×10⁶·fO⁻¹.²⁶⁷⁴ kΩ. |
| RUN (Pin 2) | Enable/disable control input | High (>1.5V) enables regulation; low (<0.3V) forces shutdown with <1µA IQ; must not be left floating. |
| SYNC/MODE (Pin 3) | Multi-function control pin | Voltage level selects operating mode: GND = pulse skip, SVIN/2 = forced continuous, SVIN = Burst Mode; also accepts external sync clock (0.4–4MHz). |
| SW (Pin 4) | Power switch node | Connects to inductor; swings between PVIN and GND; requires low-inductance layout to minimize EMI and voltage overshoot. |
| GND (Pins 5 & 11) | Main power and thermal ground | Pins 5 and 11 (exposed pad) must be soldered to a solid PCB ground plane for thermal dissipation and noise control. |
| PVIN (Pin 6) | Main power input for high-side switch | Supplies gate drive and conduction path for P-channel MOSFET; decouple locally with 0.1–1µF ceramic capacitor. |
| SVIN (Pin 7) | Signal power supply | Bias source for error amplifier, comparators, and logic; must be ≥ PVIN and decoupled independently. |
| PGOOD (Pin 8) | Open-drain power-good indicator | Pulls low when VOUT deviates >±7% from regulation; includes 40µs blanking after startup to prevent false trips. |
| VFB (Pin 9) | Feedback input | Compares resistive divider output against 0.6V reference; determines regulated output voltage (VOUT = 0.6V × (1 + R1/R2)). |
| ITH (Pin 10) | Error amplifier compensation node | Controls peak inductor current limit; voltage range 0.4–1.4V; connects to RC network for loop stability tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Synchronous Power Switches | 0.15Ω P-channel + 0.13Ω N-channel MOSFETs eliminate external diode, enabling >95% efficiency and reduced board area. |
| Programmable High-Frequency Operation | 1.3–4MHz range via RT resistor or external clock - permits ultra-compact magnetic and capacitor selection without sacrificing transient response. |
| Three Low-IQ Operating Modes | Burst Mode (40µA), pulse-skip, and forced continuous - selectable per application noise vs. efficiency trade-off without changing hardware. |
| Stable with Ceramic Output Capacitors | No ESR requirement - simplifies BOM, improves reliability, and eliminates electrolytic aging concerns in long-life designs. |
| Pre-Biased Output Startup Support | Enables safe start-up into pre-charged loads (e.g., hot-swap systems or multi-rail sequencing) without reverse current flow. |
| 100% Duty-Cycle Dropout Operation | Maintains regulation as VIN drops to VOUT + IOUT×RDS(ON) - critical for battery end-of-discharge operation in portable devices. |
Applications
| Digital Camera Power Management | Handheld Instrument Core Supply |
|---|---|
Use Scenario: Powers image sensor, ISP, and display backlight from single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1.2V/1.8V/2.8V at up to 1.25A with fast load-step response. Use Value: 4MHz operation enables 1.0µH inductor and 22µF ceramic output cap - reducing solution height to <1.5mm while maintaining 25mVp-p ripple. |
Use Scenario: Supplies microcontroller core, ADC, and communication interface in portable test equipment. IC Role / Device Role / Timing Role: High-efficiency, low-noise point-of-load converter with programmable mode selection. Use Value: Burst Mode reduces IQ to 40µA during measurement standby, extending battery life by >3× versus forced-continuous alternatives. |
| Notebook Computer Subsystem Rail | Board-Mounted Industrial Sensor Node |
Use Scenario: Generates 3.3V or 5V auxiliary rail for USB controller, fan driver, or EC from main 5V or 12V bus. IC Role / Device Role / Timing Role: Compact, thermally robust buck converter with integrated power switches and thermal shutdown. Use Value: MSOP package with exposed pad achieves θJA = 40°C/W - sustains 1.25A output at 60°C ambient without heatsink. |
Use Scenario: Powers low-power MCU, LoRa transceiver, and analog front-end in battery-operated environmental monitor. IC Role / Device Role / Timing Role: Primary DC/DC regulator supporting wide VIN (2.5–5.5V) and deep sleep modes. Use Value: Shutdown current <1µA and guaranteed –40°C to 125°C operation ensure reliable field deployment across temperature extremes. |
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 | 3.6V–17V input, 3A output, fixed 3.3V/adjustable; 2.5MHz max; no SYNC/MODE pin for multi-mode selection. | Better suited for higher-input-voltage industrial rails; lacks Burst Mode and pre-biased startup support. | Select when input exceeds 5.5V or >1.25A output is required; avoid if low-IQ burst operation or Li-ion direct regulation is needed. |
| MAX17504ATP+T | 4.5V–60V input, 3.5A output, 400kHz–2.2MHz; external compensation; no integrated low-RDS(ON) switches below 0.2Ω. | Designed for wide-VIN industrial/motor drives; higher minimum input limits use in single-cell battery apps. | Choose for high-VIN (>5.5V) or high-current (>1.25A) applications; not drop-in for LTC3565IMSE#PBF's 2.5V–5.5V Li-ion domain. |
Compared with TPS62130ARGTR and MAX17504ATP+T, the LTC3565IMSE#PBF uniquely combines ultra-low 2.5V start-up, 40µA Burst Mode IQ, and 4MHz programmability in a thermally enhanced MSOP - making it optimal for space- and battery-limited portable electronics where input voltage stays within 2.5–5.5V.
Availability
LTC3565IMSE#PBF is available at Aetrix Electronics and suitable for digital camera power management, handheld instrument core supplies, and notebook computer subsystem rails requiring stable component supply, guaranteed industrial temperature range, and long-term lifecycle continuity.
Supply support for LTC3565IMSE#PBF 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. (ADI) acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear power products including the LTC3565 family.
The LTC3565 belongs to Linear's high-frequency monolithic synchronous buck regulator product line, designed specifically for compact, high-efficiency power conversion in battery-powered portable electronics with stringent size and quiescent current requirements.
FAQ
What is the maximum supported switching frequency for the LTC3565IMSE#PBF?
The LTC3565IMSE#PBF supports up to 4MHz operation, either via RT resistor programming or external clock synchronization. While 4MHz is guaranteed by design, production testing covers 1.3–1.7MHz; higher frequencies require validation per application conditions and duty-cycle constraints (fO(MAX) ≈ 6.67 × VOUT/VIN(MAX) MHz). The LTC3565IMSE#PBF achieves this using internal slope compensation and current-mode control to maintain stability.
Does the LTC3565IMSE#PBF support pre-biased output startup?
Yes, the LTC3565IMSE#PBF supports safe startup into a pre-charged output without reverse current flow. This is enabled by internal circuitry that disables the bottom switch during initial soft-start, preventing discharge of the output capacitor through the synchronous rectifier. Verified in typical application circuits (e.g., Figure 4 in the LTC3565 datasheet), this feature makes the LTC3565IMSE#PBF suitable for hot-swap and multi-rail sequencing systems.
What are the thermal characteristics of the LTC3565IMSE#PBF in the MSOP package?
The LTC3565IMSE#PBF in the 10-lead MSOP (MSE) package has θJA = 40°C/W and θJC = 10°C/W. With the exposed pad (Pin 11) properly soldered to a 250mm² copper area, it can sustain 1.25A output continuously at 60°C ambient. Thermal performance is validated across the full –40°C to 125°C junction temperature range, and overtemperature protection activates above TJ = 125°C to prevent damage.
How does the SYNC/MODE pin configure operating modes on the LTC3565IMSE#PBF?
The SYNC/MODE pin on the LTC3565IMSE#PBF selects three distinct low-load modes: tying to GND enables pulse-skipping; applying SVIN/2 (mid-supply) enables forced continuous conduction; connecting to SVIN enables Burst Mode (40µA IQ). It also accepts an external 0.4–4MHz clock signal for synchronization. All configurations are voltage-level sensitive and do not require external logic - a key differentiator of the LTC3565IMSE#PBF versus fixed-mode competitors.
Is the LTC3565IMSE#PBF RoHS-compliant and lead-free?
Yes, the LTC3565IMSE#PBF is RoHS-compliant and features a lead-free finish (Pb-free, NiPdAu plating). Per Linear Technology documentation, the "#PBF" suffix explicitly denotes lead-free packaging. The device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards - confirmed in the official Linear/Analog Devices order information table.
LTC3565IMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC3565IMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3565IMSE#PBF 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#PBF reliable?
The price and inventory of LTC3565IMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3565IMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3565IMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3565IMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3565IMSE#PBF?
LTC3565IMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3565IMSE#PBF 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#PBF?
For technical support, including LTC3565IMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3565IMSE#PBF requirements.
6.How does Aetrix verify that LTC3565IMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3565IMSE#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3565IMSE#PBF?
All LTC3565IMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3565IMSE#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC3565IMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3565IMSE#PBF 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…
