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Analog Devices Inc. LTM8056IY
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- Part No.:
- LTM8056IY
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 121-BBGA Module
- Datasheet:
-
LTM8056IY.pdf
- Description:
- DC DC CONVERTER 1.2-48V
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
LTM8056IY from Analog Devices (formerly Linear Technology) is a 58V-input, buck-boost µModule regulator integrating controller, power switches, inductor, and support components in a single 15mm × 15mm × 4.92mm BGA package. It delivers up to 5.5A output current at 12V from 24VIN, supports 1.2V–48V adjustable output, operates from 5V–58VIN, and achieves up to 96% efficiency in wide-input industrial power supplies.
For engineers reviewing the LTM8056IY datasheet, LTM8056IY pinout, LTM8056IY application, or LTM8056IY equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and current-limiting behavior, synchronization capability (200–700kHz), and real-world parallel operation guidance - all specific to the LTM8056IY#PBF RoHS-compliant variant with –40°C to 125°C operating range.
Technical Context
The LTM8056IY implements a fixed-frequency current-mode PWM buck-boost topology capable of regulating output voltage when input is either above or below VOUT. Its internal architecture includes integrated MOSFETs, a 6.8µH inductor, and dual average current regulation loops for both input (50mV threshold) and output (58mV threshold).
Switching frequency is programmable from 100kHz to 800kHz via an external RT resistor, and synchronization is supported over 200kHz–700kHz using the SYNC input and CLKOUT output. Thermal protection activates above 125°C junction temperature, and operation requires no external compensation under typical conditions due to internal loop design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 58V - supports wide-range battery, solar, and industrial bus inputs without pre-regulation |
| Output Voltage Range | 1.2V to 48V - set via external FB divider; enables single part to cover multiple system rails |
| Max Output Current | 5.5A at 12VOUT/24VIN - limited by thermal design and input-output voltage ratio |
| Switching Frequency | 100kHz to 800kHz - set by RT resistor; optimal default is 525kHz (RT = 43.2kΩ) |
| Efficiency | Up to 96% - measured at 12VOUT/24VIN/3.4A; peak efficiency shifts with VIN/VOUT ratio |
| Package | 121-ball BGA, 15mm × 15mm × 4.92mm - RoHS-compliant SAC305 finish; requires standard SMT reflow |
| Operating Temperature | –40°C to 125°C - specified and guaranteed for LTM8056IY grade; junction-limited |
Pinout & Package
The LTM8056IY is housed in a 121-ball BGA package (15mm × 15mm × 4.92mm) with three functional banks and exposed thermal pads on Bank 1 (GND). Assembly requires JEDEC-compliant reflow per MSL Level 3; thermal performance depends critically on PCB copper area under GND balls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Bank 1, L1) | Power Ground Return | Primary thermal path and low-impedance return for input/output capacitors and feedback network |
| VIN (Bank 3, L9) | Main Input Power | Supplies internal power switches; must be bypassed locally with ≥2×4.7µF ceramic capacitors |
| VOUT (Bank 2, A1) | Regulated Output | Delivers final DC output; connects to output filter caps and load; referenced by FB and IOUTMON |
| IOUT (Bank 2, D1) | Output Current Sense Input | Sets output current limit at 58mV/RSENSE; required for overload protection and parallel operation |
| FB (Bank 2, J1) | Voltage Feedback Input | Regulated to 1.200V ±12mV; sets VOUT via resistive divider (e.g., 100k/2.55k for 48V) |
| RT (Bank 2, H1) | Frequency Programming | Resistor-to-GND sets switching frequency (e.g., 43.2kΩ → 525kHz); mandatory connection |
| SYNC (Bank 2, H2) | External Clock Input | Accepts 200–700kHz square wave; internal pull-down allows floating for free-running mode |
| RUN (Bank 1, L4) | Enable Control | Active-high enable; 1.25V typical rising threshold; <0.3V disables with <1µA quiescent current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Buck-Boost µModule | Contains controller, MOSFETs, 6.8µH inductor, and support circuitry - eliminates layout-sensitive power stage design |
| Adjustable Input/Output Current Limits | 50mV input / 58mV output sense thresholds - enables precise, resistor-set current limiting without external op-amps |
| Parallel Operation Support | IOUTMON-to-CTL master-slave configuration - allows scalable output current with matched sharing and no external clock sync required |
| Wide Synchronization Range | 200kHz–700kHz SYNC input + 180°-phase CLKOUT - simplifies multi-rail timing alignment in complex systems |
| Thermal Protection with High Threshold | Junction shutdown >125°C - avoids nuisance tripping during transient loads while protecting long-term reliability |
Applications
| Industrial Power Supply | Solar Charge Controller |
|---|---|
Use Scenario: 24VDC industrial PLC powering mixed-voltage peripherals across fluctuating 18–56V DC bus. IC Role / Device Role / Timing Role: Non-isolated buck-boost regulator maintaining stable 12V/5V rails despite wide input variation and load transients. Use Value: Eliminates need for separate pre-regulator stages; 94% efficiency at 24VIN→12V/3.4A reduces thermal management burden. |
Use Scenario: MPPT-based solar charge controller converting variable PV array output (15–50V) to regulated 28.8V battery charging voltage. IC Role / Device Role / Timing Role: Primary DC/DC stage delivering constant-current/constant-voltage battery charge profile with input current monitoring. Use Value: Input current sense (IINMON) enables accurate MPPT algorithm feedback; wide VIN range accommodates cold-start and partial-shading conditions. |
| Battery-Powered Test Equipment | High-Voltage Data Acquisition System |
Use Scenario: Portable oscilloscope powered from 3S–4S Li-ion (9–16.8V) requiring clean 3.3V, 5V, and ±12V rails. IC Role / Device Role / Timing Role: Main buck-boost converter generating 12V intermediate rail, feeding downstream LDOs and isolated DC/DC for analog sections. Use Value: 1.2V–48V programmability allows reuse across product variants; soft-start (SS pin) prevents inrush into large capacitor banks. |
Use Scenario: 48V-powered data acquisition unit conditioning high-impedance sensor signals with precision ADCs and op-amps. IC Role / Device Role / Timing Role: Point-of-load regulator supplying low-noise 5V/3.3V to analog front-end, rejecting ripple from noisy 48V bus. Use Value: Low output RMS ripple (25mV typ.) and selectable frequency reduce conducted EMI; output current monitor aids fault logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost µModule regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM8055IY#PBF | Lower max VIN (36V) and VOUT (40V); same 15×15mm BGA footprint but 4.92mm height vs. LTM8056IY's 4.92mm; identical pinout | Not suitable for >36V input or >40V output designs; lower peak output current (8.5A @12VOUT/12VIN vs. 5.5A for LTM8056IY) | Select LTM8055IY only if input stays ≤36V and higher output current at mid-range VIN is prioritized. |
| LTM4678IY#PBF | 40V max VIN; adds PMBus interface, telemetry (VIN/VOUT/IOUT/T), and digital margining; 16×16mm BGA, 5.01mm height; not pin-compatible | Requires firmware integration and layout redesign; suited for systems needing remote monitoring, sequencing, or dynamic voltage scaling | Choose LTM4678IY when digital control, telemetry, or tighter output accuracy (<±0.5%) is required - not for drop-in replacement. |
Compared with LTM8055IY and LTM4678IY, the LTM8056IY uniquely balances ultra-wide 5–58V input range, 48V absolute max output, and compact 15mm² footprint without digital overhead - making it optimal for ruggedized analog or mixed-signal systems where simplicity, voltage headroom, and thermal predictability are critical.
Availability
LTM8056IY is available at Aetrix Electronics and suitable for industrial control, solar energy conversion, and high-reliability battery-operated devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTM8056IY 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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTM8056IY belongs to ADI's µModule regulator product line, designed to simplify power system design by integrating magnetics, power switches, and control circuitry into surface-mount packages - targeting space-constrained, thermally demanding applications in industrial, test equipment, and renewable energy systems.
FAQ
What is the guaranteed operating temperature range for the LTM8056IY?
The LTM8056IY is guaranteed to meet all electrical specifications over the full –40°C to 125°C internal junction temperature range. This rating applies specifically to the LTM8056IY#PBF variant with SAC305 (RoHS) terminal finish and is validated per JEDEC JESD22 thermal testing standards. Derating curves in the datasheet confirm performance margins at temperature extremes.
Can the LTM8056IY regulate output voltage when input voltage is below the output voltage?
Yes, the LTM8056IY uses a non-isolated buck-boost topology that inherently supports both step-up and step-down operation. When VIN < VOUT (e.g., 7V input to 12V output), it operates in boost mode; when VIN > VOUT (e.g., 48V input to 12V output), it operates in buck mode - all while maintaining regulation and current limiting via its internal control loops.
Is an output current sense resistor required for basic operation of the LTM8056IY?
No, the LTM8056IY will function without an output current sense resistor - tie IOUT to VOUT in that case. However, omitting it disables output current limiting, degrades light-load efficiency, increases output ripple, and removes critical protection against short-circuit or overload conditions. The datasheet explicitly recommends using the resistor for all production designs.
How does the CTL pin affect the LTM8056IY's output current regulation?
The CTL pin on the LTM8056IY adjusts the output current limit threshold: applying a voltage <1.2V scales the 58mV internal reference downward, reducing the maximum output current proportionally. Driving CTL to <50mV stops switching entirely. This feature enables dynamic current limiting, soft-start extension, or coordinated current sharing in parallel configurations - all without modifying hardware.
What thermal considerations are critical for reliable LTM8056IY operation?
Reliable LTM8056IY operation requires robust PCB thermal design: the GND balls (Bank 1) serve as the primary heat path, so ≥4 cm² of 2-oz copper with 6+ thermal vias to inner/ground planes is recommended. θJCbottom is 5.35°C/W; exceeding 125°C junction temperature triggers thermal shutdown. Layout must avoid enclosing the device and ensure airflow or heatsinking matches the 5.5A/12V worst-case power dissipation.
LTM8056IY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 121-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5V
- Voltage - Input (Max):
- 58V
- Voltage - Output 1:
- 1.2 ~ 48V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 5.4A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OTP
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- 96%
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 121-BGA (15x15)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM8056IY FAQ
1.How can I place an order for LTM8056IY through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8056IY 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 LTM8056IY reliable?
The price and inventory of LTM8056IY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8056IY is usually 5 days.
3.What payment methods are accepted for LTM8056IY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8056IY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8056IY?
LTM8056IY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8056IY 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 LTM8056IY?
For technical support, including LTM8056IY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8056IY requirements.
6.How does Aetrix verify that LTM8056IY is sourced from the original manufacturer or authorized distributors?
All LTM8056IY 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 LTM8056IY meets industry standards.
7.What is the process for return or replacement of LTM8056IY?
All LTM8056IY units undergo pre-shipment inspection (PSI). If there is an issue with LTM8056IY, 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 LTM8056IY part is unused and in its original packaging.
Return procedure for LTM8056IY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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