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Analog Devices Inc. LTM8052AIY
- Part No.:
- LTM8052AIY
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 81-BBGA Module
- Datasheet:
-
LTM8052AIY.pdf
- Description:
- DC DC CONVERTER 1.2-24V
- Quantity:
- Payment:
- Shipping:
Inventory:4,523
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Product details
Overview
LTM8052AIY from Analog Devices (formerly Linear Technology) is a 36V input, ±5A, 2-quadrant constant-voltage/constant-current (CVCC) µModule® step-down regulator in BGA package. It sources and sinks output current to maintain regulation across ±1.2V to ±24V output range, supports programmable current limiting via CTL_I/CTL_T pins, and operates from 6V–36V input. It is used in battery testers, Peltier drivers, and bidirectional power stages requiring precise voltage and current control.
For engineers reviewing the LTM8052AIY datasheet, LTM8052AIY pinout, LTM8052AIY application, or LTM8052AIY equivalent, this page delivers verified technical context, exact pin functions, real-world CVCC use cases, thermal and efficiency behavior at ±5A, and validated alternative options for sourcing/sinking power regulation - all tied explicitly to the LTM8052AIY#PBF ordering variant with SnPb BGA finish and –40°C to 125°C operating range.
Technical Context
The LTM8052AIY implements fixed-frequency average current-mode control with integrated inductor, MOSFETs, controller, and compensation. Its 2-quadrant operation enables true bidirectional energy flow: it actively sinks current into VIN during reverse-load conditions while maintaining regulated VOUT, unlike conventional buck regulators.
It features dual analog current-limit inputs (CTL_I and CTL_T), where the lower of the two 0–1.5V control voltages sets the positive/negative current limits asymmetrically (e.g., +5.6A / –7.7A at 1.5V). Unlike the LTM8052, the LTM8052AIY omits 125% output overvoltage protection, enabling sustained operation above target VOUT during current-regulated sinking - critical for battery cell balancing and active load simulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 36V - supports wide industrial and automotive supply rails; absolute max 40V. |
| Output Voltage Range | 1.2V to 24V (or –1.2V to –24V) - set by single RADJ resistor; ADJ pin regulated to 1.19V. |
| Output Current Capability | ±5A continuous - sources up to +5A, sinks up to –6A (typical); current limit programmable 0–1.5V. |
| Switching Frequency | 100kHz to 1MHz - set by RT resistor or synchronized externally via SYNC pin. |
| Package Dimensions | 15mm × 11.25mm × 3.42mm BGA - RoHS-compliant SAC305 solder finish, MSL Level 3. |
| Thermal Resistance | θJC(bottom) = 5.4°C/W - requires robust PCB copper area under exposed thermal pad for 125°C junction operation. |
| Operating Temperature | –40°C to 125°C internal junction - guaranteed performance across full range per LTM8052AIY specification. |
Pinout & Package
Package: 81-lead BGA (15mm × 11.25mm × 3.42mm), SnPb (63/67) terminal finish, e0 marking code, MSL Level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Bank 3) | Power Input | Supplies internal regulator and power switches; must be bypassed with ≥330µF low-ESR capacitor. |
| VOUT (Bank 1) | Power Output | Delivers regulated bidirectional current; connects to load and output capacitors; reverse current flows back to VIN. |
| GND (Bank 2) | Power & Signal Ground | Primary thermal path; ties to large local ground plane; return for feedback divider (RADJ). |
| CTL_I (D8) | Analog Current Limit Input | Sets max output current (positive/negative) via 0–1.5V; unused → tie to VREF. |
| CTL_T (D7) | Temperature-Compensated Current Limit | Accepts thermistor network to derate current vs. temperature; unused → tie to VREF. |
| ADJ (K8) | Output Voltage Feedback | Regulated to 1.19V; RADJ = 11.9/(VOUT – 1.19) kΩ sets output voltage. |
| RT (G8) | Frequency Programming | Resistor to GND sets switching frequency (100kHz–1MHz); open circuit not allowed. |
| RUN (L6) | Enable / UVLO Control | Active-high enable; threshold 1.55V (falling); 5.5µA sink current enables precision UVLO design. |
| SYNC (L7) | External Clock Input | Accepts external clock; RT value must be 20% lower than sync frequency; ground when unused. |
| VREF (F8) | 2V Buffered Reference | Stable 2V output (0.5mA drive); valid when VIN > 6V and RUN high; used to bias CTL_I/CTL_T. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2-Quadrant Power Stage | Combines controller, MOSFETs, and 2.2µH inductor in single BGA - eliminates external magnetics and layout sensitivity. |
| Asymmetric Bidirectional Current Control | Independent +5.6A / –7.7A (typ) limits at 1.5V CTL_I/CTL_T - enables precise charge/discharge profiling in battery testing. |
| No Output Overvoltage Shutdown (LTM8052A variant) | Allows sustained operation above target VOUT during sinking - essential for active load simulation and cell balancing without interruption. |
| Forced Continuous Conduction Mode | Maintains switching at zero load - prevents subharmonic oscillation and ensures clean synchronization for multi-phase systems. |
| Thermal Protection with Recovery | Overtemperature shutdown disables switching and pulls SS low; resumes after cooldown - protects against transient overload without latch-up. |
Applications
| Battery Cell Balancing | Peltier Thermoelectric Driver |
|---|---|
|
Use Scenario: Actively equalizes voltage across series-connected Li-ion cells during charging by sinking excess current from higher-voltage cells. IC Role / Device Role / Timing Role: 2-quadrant CVCC regulator sourcing/sinking bidirectional current with ±5A capability and precise 1.2V–24V programmability. Use Value: Enables fast, efficient passive-to-active balancing without external H-bridge; eliminates need for discrete FETs and gate drivers. |
Use Scenario: Drives thermoelectric coolers (TECs) requiring reversible current to switch between heating and cooling modes. IC Role / Device Role / Timing Role: Bidirectional current source delivering ±5A with <1% load regulation and forced CCM for stable thermal response. Use Value: Replaces dual-buck or H-bridge solutions with single µModule - reduces board space by >60% and eliminates cross-conduction risk. |
| Battery Tester / Simulator | Motor Drive Power Regulator |
|
Use Scenario: Simulates real battery discharge/charge profiles in EV battery pack validation systems using programmable current sinking and sourcing. IC Role / Device Role / Timing Role: Precision CVCC stage with analog-controlled current limits (CTL_I/CTL_T) and 100kHz–1MHz adjustable switching frequency. Use Value: Achieves <±0.5% current accuracy across ±5A range - meets ISO 16750-2 test equipment requirements for automotive battery emulation. |
Use Scenario: Supplies controlled bidirectional power to small DC motors or voice coil actuators in closed-loop motion control. IC Role / Device Role / Timing Role: Regulated 2-quadrant supply supporting regenerative braking (current sink) and motoring (current source) phases. Use Value: Eliminates separate brake resistor and reverse-polarity supply - simplifies motor driver architecture and improves energy recovery efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-quadrant CVCC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM8052EY#PBF | Same 2-quadrant CVCC architecture but includes 125% output overvoltage protection; RoHS-compliant Au-finish LGA package (11.25mm × 15mm × 2.82mm). | Turns off during output overvoltage events - unsuitable for continuous sinking above VOUT target (e.g., cell balancing), but preferred for safety-critical voltage-regulated loads. | Select LTM8052EY#PBF when OVP is required and LGA assembly is available; avoid for pure current-regulated sinking applications. |
| LTM8026IY#PBF | One-quadrant (source-only) 5A µModule buck; no current sinking, no CTL_I/CTL_T pins; simpler control, higher peak efficiency at light loads. | Cannot sink current - unusable for battery discharge, Peltier reversal, or regenerative braking; limited to unidirectional power delivery. | Choose LTM8026IY#PBF only when bidirectional operation is unnecessary and cost/size reduction outweighs loss of 2-quadrant functionality. |
Compared with LTM8052EY#PBF, the LTM8052AIY enables uninterrupted current-sinking operation above VOUT, critical for active balancing; compared with LTM8026IY#PBF, it adds full bidirectional control at the cost of slightly reduced light-load efficiency and added pin complexity.
Availability
LTM8052AIY is available at Aetrix Electronics and suitable for battery testing systems, Peltier-based thermal management, and motor drive power regulation requiring stable component supply, extended temperature support (–40°C to 125°C), and SnPb-compatible reflow processing.
Supply support for LTM8052AIY 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 acquired Linear Technology in 2017 and maintains the µModule product line as high-integration power solutions combining ICs, magnetics, and passives in compact packages.
The LTM8052AIY belongs to the µModule regulator family designed specifically for space-constrained, high-reliability applications needing complete, verified power subsystems - especially where bidirectional current control, thermal robustness, and minimal external components are mandatory.
FAQ
What is the key functional difference between LTM8052AIY and LTM8052EY?
The LTM8052AIY omits output overvoltage protection (OVP), allowing continuous operation even when VOUT exceeds the regulation setpoint during current-sinking - essential for battery cell balancing. In contrast, the LTM8052EY triggers OVP shutdown at 125% VOUT, making it safer for voltage-critical loads but incompatible with sustained sinking above target voltage. Both share identical pinout, package, and CVCC functionality.
Can LTM8052AIY sink and source current simultaneously?
No - the LTM8052AIY operates in either sourcing or sinking mode at any given time, determined by load demand relative to its regulated VOUT. When the load forces current into VOUT (e.g., discharging capacitor or driving back-EMF), the LTM8052AIY sinks that current to hold VOUT steady. It cannot source and sink on the same output node concurrently, but transitions seamlessly between quadrants based on real-time load conditions.
How is output voltage set on LTM8052AIY, and what tolerance can be expected?
Output voltage on LTM8052AIY is set by a single resistor (RADJ) from ADJ pin to GND, using RADJ = 11.9/(VOUT – 1.19) kΩ. The ADJ pin is internally regulated to 1.19V (±3mV), and VREF is 2.0V (±0.04V). Combined with resistor tolerance, typical output accuracy is ±1% over temperature and line/load - verified across –40°C to 125°C for LTM8052AIY.
Does LTM8052AIY require external compensation components?
No - the LTM8052AIY is fully internally compensated. The COMP pin (H8) connects directly to the PWM comparator input and is intended only for rare loop modifications; in standard operation, it must be left open. No external RC networks, type-II/III compensators, or stability tuning are needed - simplifying design and reducing BOM count.
What thermal design guidance applies to LTM8052AIY in BGA package?
LTM8052AIY's θJC(bottom) = 5.4°C/W demands a minimum 4-layer PCB with ≥4 cm² exposed copper area under the thermal pad, connected via ≥8 thermal vias (0.3mm diameter, filled or capped) to inner ground planes. Without this, junction temperature exceeds 125°C at >3.5A continuous load. The datasheet specifies θJA = 18.6°C/W measured on a 7.62cm × 7.62cm 4-layer board - actual performance depends strictly on implemented copper mass and airflow.
LTM8052AIY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 81-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6V
- Voltage - Input (Max):
- 36V
- Voltage - Output 1:
- 1.2 ~ 24V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 5A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP, OVP
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 81-BGA (15x11.25)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM8052AIY FAQ
1.How can I place an order for LTM8052AIY through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM8052AIY 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 LTM8052AIY reliable?
The price and inventory of LTM8052AIY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM8052AIY is usually 5 days.
3.What payment methods are accepted for LTM8052AIY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM8052AIY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM8052AIY?
LTM8052AIY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM8052AIY 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 LTM8052AIY?
For technical support, including LTM8052AIY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM8052AIY requirements.
6.How does Aetrix verify that LTM8052AIY is sourced from the original manufacturer or authorized distributors?
All LTM8052AIY 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 LTM8052AIY meets industry standards.
7.What is the process for return or replacement of LTM8052AIY?
All LTM8052AIY units undergo pre-shipment inspection (PSI). If there is an issue with LTM8052AIY, 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 LTM8052AIY part is unused and in its original packaging.
Return procedure for LTM8052AIY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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