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Analog Devices Inc. LTM8065EY#PBF
- Part No.:
- LTM8065EY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 36-BBGA Module
- Datasheet:
-
LTM8065EY#PBF.pdf
- Description:
- DC DC CONVERTER 0.97-18V
- Quantity:
- Payment:
- Shipping:
Inventory:3,831
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Product details
Overview
LTM8065EY#PBF from Analog Devices is a 40V input, 2.5A continuous-output Silent Switcher® µModule® step-down regulator integrating controller, MOSFETs, inductor, and support components in a compact BGA package. It delivers regulated output from 0.97V to 18V (or –3.3V to –18V) with programmable 200kHz–3MHz switching frequency and supports automotive battery regulation, industrial point-of-load, and portable power applications.
For engineers reviewing the LTM8065EY#PBF datasheet, LTM8065EY#PBF pinout, LTM8065EY#PBF application, or LTM8065EY#PBF equivalent, key selection criteria include its integrated inductor, low-noise Silent Switcher architecture, thermal performance in 6.25mm × 6.25mm × 2.32mm BGA, programmable soft-start via TR/SS, and external synchronization capability for EMI-sensitive designs.
Technical Context
The LTM8065EY#PBF employs current-mode PWM control with internal compensation, enabling stable regulation across wide input (3.4V–40V) and output (0.97V–18V) ranges. Its fixed-frequency architecture supports resistor-programmed switching (200kHz–3MHz) and four SYNC modes: Burst Mode®, pulse-skipping, spread-spectrum, and external clock synchronization.
Thermal management relies on bottom-thermal-pad GND banks (A1/A4/A6) and a θJCbottom of 5.9°C/W. The device uses an internal 0.97V reference at FB, with PG monitoring FB voltage within ±10% for power-good signaling, and includes overtemperature shutdown above 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 40V - supports 12V/24V/36V industrial and automotive batteries without external pre-regulation. |
| Output Current | 2.5A continuous, 3.5A peak - sustained delivery under thermal limits; derates with ambient temperature and VIN–VOUT differential. |
| Output Voltage Range | 0.97V to 18V (positive), or –3.3V to –18V (negative) - set by single RFB resistor; enables precise core voltage or bias rail generation. |
| Switching Frequency | 200kHz to 3MHz - selected via RT-to-GND resistor; higher frequencies reduce inductor size but increase switching loss. |
| Quiescent Current | 3µA (VIN), 1µA (BIAS) - ultra-low standby draw in Burst Mode® for battery-powered systems. |
| Output Ripple | 10mV peak-to-peak - achieved with recommended ceramic output capacitors; meets noise-sensitive analog/RF supply requirements. |
| Package Dimensions | 6.25mm × 6.25mm × 2.32mm BGA - low-profile footprint fits underside of PCBs for high-density layouts. |
Pinout & Package
The LTM8065EY#PBF is housed in a 36-lead RoHS-compliant over-molded BGA package (6.25mm × 6.25mm × 2.32mm) with thermal enhancement via bottom GND pads. Pin assignment follows JEDEC-standard BGA layout with three functional banks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1, A4, A6) | Ground Reference & Thermal Path | Primary heat dissipation path; must connect to large local ground plane for thermal integrity and noise control. |
| VIN (B2, C1, C2, D1, D2) | Main Input Power Supply | Supplies internal regulator and power switches; requires local 2.2µF low-ESR ceramic bypass capacitor. |
| VOUT (C3, C4, D3, D4, E3, E4) | Regulated Output Power | Delivers up to 2.5A; connects to output filter capacitor and load; multiple pins reduce IR drop and improve current sharing. |
| FB (B1) | Feedback Input | Regulated to 0.97V; sets output voltage via RFB resistor; accuracy directly determines VOUT tolerance. |
| RT (A5) | Frequency Programming | Resistor-to-GND sets switching frequency; values from 10.7kΩ (3MHz) to 232kΩ (200kHz); sensitive to stray capacitance. |
| RUN (B6) | Enable/Shutdown Control | Logic-level input: <0.9V disables regulator (μA quiescent), ≥1.06V enables; tied to VIN if always-on operation required. |
| SYNC (B4) | Mode Selection & Clock Sync | Four-state interface: GND = Burst Mode®, float = pulse-skip, 2.9–4.2V = spread spectrum, driven clock = sync mode. |
| TR/SS (B5) | Soft-Start / Tracking Input | Internal 2µA current source charges external capacitor for controlled startup; also accepts tracking voltage for sequencing. |
| PG (A3) | Power-Good Open-Drain Output | Active-low signal valid when VIN >3.4V and FB within ±10%; requires external pull-up for system monitoring or sequencing. |
| BIAS (A2) | Bias Supply Input | Must be ≥3.2V; powers internal circuitry; tie to VOUT if VOUT ≥3.2V to improve efficiency; else use external source or GND. |
| AUX (B2) | Low-Current VOUT Tap | Internally connected to VOUT; used for feedforward capacitor (AUX→FB); not for load current-max 1mA sourcing. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Reduces EMI emissions by >20dB vs conventional switchers; enables CISPR22 Class B compliance without external filters. |
| Integrated Inductor & Full Power Stage | Eliminates external inductor selection, layout sensitivity, and magnetic coupling issues-reduces design cycle time by ~3 weeks. |
| Programmable Soft-Start & Tracking | TR/SS pin enables controlled ramp-up or voltage sequencing with external RC; prevents inrush current and ensures safe power-up order. |
| Wide Input/Output Flexibility | Supports both positive and negative outputs (–3.3V to –18V) using same part; simplifies BOM for dual-rail systems. |
| Thermally Optimized BGA Package | θJCbottom = 5.9°C/W enables 2.5A continuous operation at 75°C ambient on 2-layer board with 2oz copper and thermal vias. |
Applications
| Automotive Battery Regulation | Industrial Point-of-Load |
|---|---|
|
Use Scenario: Regulating 12V/24V vehicle battery to 3.3V/5V for infotainment MCU and CAN transceivers in harsh thermal environments. IC Role / Device Role / Timing Role: Primary DC/DC converter providing isolated, low-noise, thermally robust power with input transient protection up to 40V. Use Value: Silent Switcher® EMI reduction avoids costly shielding; 40V max input withstands load-dump transients; BGA package survives vibration and thermal cycling. |
Use Scenario: Generating 1.2V core voltage for FPGA or DSP on dense industrial control PCBs where top-side real estate is constrained. IC Role / Device Role / Timing Role: High-density µModule delivering precise, low-ripple power directly beneath the processor package. Use Value: 6.25mm × 6.25mm footprint enables bottom-side placement; integrated inductor eliminates layout-dependent ringing; 0.97V FB reference ensures tight regulation. |
| Portable Product Power | Wall Transformer Regulation |
|
Use Scenario: Powering handheld medical devices with Li-ion battery (3.0–4.2V) and requiring 1.8V/2.5V rails with ultra-low standby current. IC Role / Device Role / Timing Role: Efficient buck converter operating down to 3.4V input, entering Burst Mode® below 10mA load to extend battery life. Use Value: 3µA quiescent current in shutdown; programmable soft-start prevents brownout during wake-up; small BGA eases mechanical integration. |
Use Scenario: Replacing linear regulators in AC/DC wall adapters to improve efficiency and reduce heat in compact enclosures. IC Role / Device Role / Timing Role: High-efficiency step-down stage converting unregulated 7–40V DC (from rectified transformer) to stable 5V/12V outputs. Use Value: Up to 95% efficiency at full load reduces thermal stress; wide input range accommodates varying transformer taps; SYNC pin enables EMI spread-spectrum for certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down µModule regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM8064EY#PBF | Lower 20V max input, 1.5A output; identical 6.25mm BGA footprint and pinout. | Not suitable for 24V/36V industrial or automotive inputs; limited to USB PD, low-voltage IoT. | Select only if input ≤20V and output current ≤1.5A; offers cost advantage where full LTM8065 capability is unnecessary. |
| LTM4625EY#PBF | Same 40V input, but 2.5A output with different pinout (LGA), no negative output support, and no spread-spectrum mode. | Lacks Silent Switcher® EMI performance; requires external inductor; unsuitable for noise-critical RF/analog supplies. | Choose when board assembly prefers LGA over BGA, or when legacy LTM46xx layout reuse is prioritized over EMI optimization. |
Compared with LTM8064EY#PBF and LTM4625EY#PBF, the LTM8065EY#PBF uniquely combines 40V input tolerance, negative output capability, integrated inductor, and spread-spectrum synchronization-making it the only option for compact, low-EMI, dual-polarity industrial power designs.
Availability
LTM8065EY#PBF is available at Aetrix Electronics and suitable for automotive battery regulation, industrial point-of-load, and portable product power applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTM8065EY#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LTM8065EY#PBF belongs to the µModule regulator product line, engineered to simplify power system design by integrating magnetics and control circuitry into surface-mount packages for space-constrained, high-reliability applications.
FAQ
What is the maximum input voltage rating for the LTM8065EY#PBF?
The LTM8065EY#PBF has an absolute maximum input voltage rating of 42V, with guaranteed operation from 3.4V to 40V. Operation above 40V risks permanent damage, and input transients (e.g., automotive load dump) must be clamped externally to remain within this limit. The device's 40V operational ceiling makes it suitable for 24V and 36V industrial bus systems.
Can the LTM8065EY#PBF generate negative output voltages?
Yes, the LTM8065EY#PBF supports negative output configurations from –3.3V to –18V when wired in inverting buck-boost topology. In this mode, the BIAS pin must be tied to the LTM8065 GND, and specific component values (e.g., RFB, COUT) are listed in Table 1 of the datasheet. This capability eliminates need for separate negative regulators in dual-rail systems.
How is the switching frequency programmed on the LTM8065EY#PBF?
The switching frequency of the LTM8065EY#PBF is set by connecting a resistor from the RT pin to GND. Values range from 10.7kΩ (3MHz) to 232kΩ (200kHz), per Table 2 in the datasheet. Stray capacitance at RT must be minimized; the pin must not be driven-only resistor-connected-to avoid instability or frequency drift.
What thermal considerations apply to the LTM8065EY#PBF's BGA package?
The LTM8065EY#PBF relies on its bottom thermal pads (GND banks A1/A4/A6) for heat transfer, with θJCbottom = 5.9°C/W. Effective thermal design requires ≥6 thermal vias (0.3mm diameter) under the GND array, connected to an inner-layer ground plane. Without proper thermal vias and copper area, junction temperature may exceed 125°C at 2.5A, triggering thermal shutdown.
Does the LTM8065EY#PBF require external components beyond input/output capacitors?
Yes-the LTM8065EY#PBF requires only input and output capacitors, one feedback resistor (RFB), and one frequency-setting resistor (RT) for basic operation. Optional components include a feedforward capacitor (AUX→FB), soft-start capacitor (TR/SS→GND), and external pull-up on PG. No external inductor, diodes, or compensation network is needed due to full integration.
LTM8065EY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 36-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.4V
- Voltage - Input (Max):
- 40V
- Voltage - Output 1:
- 0.97 ~ 18V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 2.5A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C (With Derating)
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-BGA (6.25x6.25)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM8065EY#PBF FAQ
1.How can I place an order for LTM8065EY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8065EY#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 LTM8065EY#PBF reliable?
The price and inventory of LTM8065EY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8065EY#PBF is usually 5 days.
3.What payment methods are accepted for LTM8065EY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8065EY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8065EY#PBF?
LTM8065EY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8065EY#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 LTM8065EY#PBF?
For technical support, including LTM8065EY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8065EY#PBF requirements.
6.How does Aetrix verify that LTM8065EY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8065EY#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 LTM8065EY#PBF meets industry standards.
7.What is the process for return or replacement of LTM8065EY#PBF?
All LTM8065EY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8065EY#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 LTM8065EY#PBF part is unused and in its original packaging.
Return procedure for LTM8065EY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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