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Analog Devices Inc. LTM8033EY#PBF
- Part No.:
- LTM8033EY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 76-BBGA Module
- Datasheet:
-
LTM8033EY#PBF.pdf
- Description:
- DC DC CONVERTER 0.8-24V 72W
- Quantity:
- Payment:
- Shipping:
Inventory:2,618
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Product details
Overview
LTM8033EY#PBF from Analog Devices (formerly Linear Technology) is an ultralow-noise, EN55022 Class B-compliant 36V input, 3A μModule® buck regulator with integrated inductor, EMI filter, controller, and power switches. It delivers 0.8V–24V output over 3.6V–36V input, supports 200kHz–2.4MHz switching via RT resistor, and operates in compact RoHS-compliant BGA package (15mm × 11.25mm × 4.92mm). It is used in automotive battery regulation and industrial distributed supplies where radiated emissions compliance is critical.
For engineers reviewing the LTM8033EY#PBF datasheet, LTM8033EY#PBF pinout, LTM8033EY#PBF application, or LTM8033EY#PBF equivalent, key selection criteria include its integrated EMI filtering, programmable soft-start via RUN/SS, current-mode control architecture, PGOOD monitoring, and parallel operation capability via SHARE pin - all within a thermally optimized land-grid module footprint.
Technical Context
The LTM8033EY#PBF implements a fixed-frequency current-mode PWM controller with internal EMI filter, enabling standalone EN55022 Class B radiated emissions compliance without external ferrites. Its oscillator frequency is resistor-programmable (RT pin), and it features automatic Burst Mode® operation below ~300mA load to reduce quiescent current to 50µA.
Thermal management relies on bottom-side thermal pad conduction (θJCbottom = 5.2°C/W) and top-side convection (θJCtop = 16.7°C/W); junction temperature is monitored by internal thermal shutdown (>125°C activation). The BIAS pin enables efficiency optimization by sourcing bias power externally when VOUT ≥ 2.8V, reducing VIN current draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6V to 36V - supports wide-range industrial and automotive battery inputs including cold-crank and load-dump conditions. |
| Output Current | 3A continuous - sufficient for powering FPGAs, DSPs, or multi-rail subsystems without external current boosting. |
| Output Voltage Range | 0.8V to 24V - set by single RADJ resistor (RADJ = 394.21/(VOUT – 0.79) kΩ), enabling precise point-of-load regulation. |
| Switching Frequency | 200kHz to 2.4MHz - selected via RT-to-GND resistor; higher frequencies allow smaller external capacitors and reduced EMI filter size. |
| EMI Compliance | EN55022 Class B radiated emissions met standalone - eliminates need for external shielding or complex board-level filtering in most applications. |
| Quiescent Current | 50µA in Burst Mode - extends battery life in portable or always-on systems during light-load standby. |
| Thermal Resistance | θJCbottom = 5.2°C/W - enables high-power density operation with minimal PCB copper area required for heat dissipation. |
Pinout & Package
Package: 76-lead BGA (15mm × 11.25mm × 4.92mm), RoHS-compliant SAC305 solder finish, MSL Level 3, –40°C to +125°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Bank 1) | Power Output | Main regulated DC output node; connect bulk output capacitor and load between these pins and GND. |
| GND (A8, Bank 2) | Ground Reference | Primary return path for feedback divider (RADJ), power stage, and control circuitry; must tie to local low-impedance ground plane. |
| FIN (Bank 3) | Filtered Input Node | Post-EMI-filter input; connects to recommended CFIN capacitor; optional for enhanced conducted noise suppression. |
| VIN (Bank 4) | Main Input Supply | Supplies internal regulator and power switches; requires local low-ESR bypass capacitor per Table 1. |
| SHARE (A6) | Current Share Control | Enables parallel operation of multiple LTM8033 units for >3A output; tie all SHARE pins together with short traces. |
| ADJ (A7) | Feedback Reference | Regulated to 0.79V; sets output voltage via RADJ resistor; also used by PGOOD comparator (90% threshold). |
| RT (B6) | Frequency Programming | Connect resistor to GND to set switching frequency (200kHz–2.4MHz); value defined in Table 2 of datasheet. |
| SYNC (B8) | External Clock Input | Accepts external clock for synchronization; disable Burst Mode when pulled >0.7V; ground for low-noise Burst Mode. |
| PGOOD (B7) | Power Good Indicator | Open-collector output asserting high when ADJ reaches 90% of target; valid only when RUN/SS is high and VIN > 3.6V. |
| AUX (G3) | Auxiliary VOUT Tap | Internal connection to VOUT for simplified BIAS routing; not rated for load current - do not connect to system load. |
| BIAS (G4) | Bias Power Input | Supplies internal power bus; connect to VOUT if ≥2.8V, or external 2.8V–25V source; ensures VIN + BIAS < 56V. |
| RUN/SS (G8) | Enable & Soft-Start | Pull <0.2V to shut down (IIN < 1µA); tie ≥2.5V for operation; also provides controlled soft-start via external capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated EMI Filter | Meets EN55022 Class B radiated emissions without external shielding or ferrite beads - reduces layout complexity and BOM count. |
| Programmable Switching Frequency | 200kHz–2.4MHz via single RT resistor - enables optimization for efficiency (lower f), size (higher f), or EMI profile (avoiding sensitive bands). |
| Current-Mode Control | Provides inherent cycle-by-cycle current limiting and fast transient response - improves stability under dynamic load steps. |
| Parallel Operation Support | SHARE pin enables accurate current sharing across multiple LTM8033 units - scales output current beyond 3A without external controllers. |
| Programmable Soft-Start | RUN/SS pin accepts external capacitor to control startup dV/dt - prevents inrush current and output overshoot during power-up. |
| Burst Mode® Operation | Reduces quiescent current to 50µA at light loads - extends runtime in battery-powered systems while maintaining tight output regulation. |
Applications
| Automotive Battery Regulation | Industrial Distributed Supply Regulation |
|---|---|
Use Scenario: Regulating 12V/24V vehicle battery rails to power infotainment ECUs, ADAS sensors, or telematics modules. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator delivering stable 3.3V/5V/12V outputs with low EMI to meet automotive EMC standards. Use Value: Standalone EN55022 Class B compliance eliminates need for additional EMI filters, reducing cost and board space in constrained automotive modules. |
Use Scenario: Providing isolated sub-rails in factory automation PLCs, motor drives, or process controllers where multiple voltage domains coexist. IC Role / Device Role / Timing Role: Compact, self-contained DC/DC converter replacing discrete buck designs for auxiliary 3.3V or 5V logic supplies. Use Value: Integrated inductor and EMI filter enable rapid deployment of reliable, low-noise power rails without custom magnetics or layout tuning. |
| Power for Portable Products | Wall Transformer Regulation |
Use Scenario: Powering handheld test equipment, medical monitors, or ruggedized field instruments powered by Li-ion or 24V wall adapters. IC Role / Device Role / Timing Role: High-efficiency, low-quiescent-current buck regulator supporting battery longevity and thermal management in sealed enclosures. Use Value: Burst Mode® operation draws only 50µA at light load, extending battery life; compact BGA footprint saves PCB area in space-constrained devices. |
Use Scenario: Replacing linear regulators or legacy switchers in AC/DC adapter secondary-side regulation for consumer electronics and IoT gateways. IC Role / Device Role / Timing Role: Efficient, low-noise post-regulator converting unregulated 12V/19V/24V adapter outputs to clean 3.3V/5V system rails. Use Value: Ultralow radiated emissions ensure compliance with FCC Part 15 without redesigning adapter PCBs or adding metal shields. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC µModule regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM8032EY#PBF | 2A output current, identical 3.6V–36V input and 0.8V–24V output range, same BGA package and pinout. | Lower current capacity limits use in high-power FPGA or processor core rails; suitable for I/O or peripheral supplies. | Select when 2A suffices and cost reduction or lower thermal load is prioritized over headroom. |
| LTM8055EY#PBF | 5A output, wider 2.8V–40V input, same 0.8V–24V output, larger 16mm × 16mm BGA package, different pinout. | Higher current and input voltage support enables use in 36V industrial systems or 48V telecom derivatives; not pin-compatible. | Choose when >3A is required and board layout allows rework for larger footprint and revised routing. |
Compared with LTM8032EY#PBF, the LTM8033EY#PBF delivers 50% more output current in identical footprint and pinout; versus LTM8055EY#PBF, it offers lower cost and smaller size for 3A applications but lacks 40V input tolerance and 5A capability.
Availability
LTM8033EY#PBF is available at Aetrix Electronics and suitable for automotive battery regulation, industrial distributed supply regulation, and portable product power applications requiring stable component supply, full RoHS compliance, and guaranteed –40°C to +125°C operation.
Supply support for LTM8033EY#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTM8033 belongs to Analog Devices' µModule regulator product line, designed to simplify power system design by integrating magnetics, control, and power stages into surface-mount packages that meet stringent EMI and thermal requirements.
FAQ
What is the maximum input voltage rating for the LTM8033EY#PBF?
The absolute maximum VIN voltage for the LTM8033EY#PBF is 36V, with recommended operating range from 3.6V to 36V. Exceeding 36V risks permanent damage. Additionally, the sum of VIN and BIAS voltages must remain below 56V to prevent overstress of internal bias circuitry - this constraint applies regardless of individual pin ratings.
How is output voltage programmed on the LTM8033EY#PBF?
The LTM8033EY#PBF output voltage is set using a single external resistor (RADJ) connected between the ADJ pin and GND. The device regulates the ADJ pin to 0.79V, so VOUT = 0.79V × (1 + RADJ/R2), where R2 is effectively 0Ω (ground). The standard formula is RADJ = 394.21/(VOUT – 0.79) kΩ - for example, 5V output requires RADJ ≈ 93.1kΩ.
Does the LTM8033EY#PBF require external components beyond input/output capacitors?
Yes - beyond bulk input (CIN) and output (COUT) capacitors, the LTM8033EY#PBF requires three additional external components: RADJ (sets VOUT), RT (sets switching frequency), and optionally CFIN (enhances conducted EMI filtering). The RUN/SS capacitor for soft-start and SYNC pull-up/down resistors are also application-dependent but not strictly mandatory for basic operation.
Can multiple LTM8033EY#PBF units be paralleled for higher current?
Yes - the LTM8033EY#PBF supports current sharing via its dedicated SHARE pin. When multiple units operate in parallel, connecting all SHARE pins together forces equal current distribution across modules. This configuration maintains regulation accuracy and thermal balance, enabling scalable solutions up to 6A (2×), 9A (3×), etc., with no master-slave controller required.
What is the purpose of the BIAS pin on the LTM8033EY#PBF?
The BIAS pin on the LTM8033EY#PBF supplies power to the internal gate drivers and control circuitry. When connected to VOUT (if ≥2.8V), it improves conversion efficiency by reducing VIN current draw. If VOUT < 2.8V, BIAS must be tied to VIN or another 2.8V–25V source. Critically, VIN + BIAS must not exceed 56V to avoid damaging internal bias regulation circuitry.
LTM8033EY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 76-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.6V
- Voltage - Input (Max):
- 36V
- Voltage - Output 1:
- 0.8 ~ 24V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 3A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 76-BGA (15x11.25)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM8033EY#PBF FAQ
1.How can I place an order for LTM8033EY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8033EY#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 LTM8033EY#PBF reliable?
The price and inventory of LTM8033EY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8033EY#PBF is usually 5 days.
3.What payment methods are accepted for LTM8033EY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8033EY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8033EY#PBF?
LTM8033EY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8033EY#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 LTM8033EY#PBF?
For technical support, including LTM8033EY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8033EY#PBF requirements.
6.How does Aetrix verify that LTM8033EY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM8033EY#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 LTM8033EY#PBF meets industry standards.
7.What is the process for return or replacement of LTM8033EY#PBF?
All LTM8033EY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM8033EY#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 LTM8033EY#PBF part is unused and in its original packaging.
Return procedure for LTM8033EY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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