My Inquiry
My Account
Analog Devices Inc. LT8613EUDE#PBF
- Part No.:
- LT8613EUDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LT8613EUDE#PBF.pdf
- Description:
- IC REG BUCK ADJ 6A 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,116
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8613EUDE#PBF from Analog Devices is a 42V, 6A synchronous step-down regulator with integrated current sense amplifier, 3µA quiescent current in Burst Mode, 40ns minimum on-time, and ±9% power-good flag accuracy. It delivers regulated 5V/6A output in automotive and industrial power supplies where ultra-low IQ and high input voltage tolerance are critical.
For engineers reviewing the LT8613EUDE#PBF datasheet, LT8613EUDE#PBF pinout, LT8613EUDE#PBF application, or LT8613EUDE#PBF equivalent, key selection criteria include input voltage range (3.4V–42V), current-sense monitor capability (IMON, ISP/ISN), thermal performance in 3mm × 6mm QFN, and synchronization support (200kHz–2.2MHz).
Technical Context
The LT8613EUDE#PBF implements peak current mode control with internal compensation, enabling fast transient response and stable operation with small inductors. Its rail-to-rail current sense inputs (ISP/ISN) support input/output current regulation and limiting, while the IMON pin provides a 20× scaled ground-referenced voltage proportional to VISP–VISN.
Burst Mode operation maintains <10mVP-P output ripple down to microamp loads with only 3µA IQ; pulse-skipping mode (enabled via SYNC pin) disables frequency foldback and sustains full switching frequency at lower loads. The EN/UV pin features a precise 1.0V threshold with 40mV hysteresis for programmable undervoltage lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 42V - supports wide-range automotive battery and industrial DC bus inputs without pre-regulation. |
| Output Current | 6A continuous - enables single-chip 5V/6A or 3.3V/6A conversion for high-power embedded systems. |
| Quiescent Current | 3µA at 12VIN→3.3VOUT - extends battery life in always-on automotive modules and IoT edge nodes. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization of inductor size vs. efficiency across diverse EMI constraints. |
| Feedback Reference | 0.970V ±0.006V - ensures tight output regulation accuracy over temperature and line/load conditions. |
| Min. On-Time | 40ns - supports high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse skipping or loss of regulation. |
| Power-Good Flag | ±9% VOUT window with fault detection - provides reliable system-level power sequencing and monitoring. |
Pinout & Package
LT8613EUDE#PBF is housed in a thermally enhanced 28-lead 3mm × 6mm plastic QFN package with exposed pad (Pin 29 = GND). The package has θJA = 40°C/W and θJC(PAD) = 5°C/W, requiring soldered thermal pad connection to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock input | Enables synchronization to external clock or selects Burst Mode (low) / pulse-skipping (high); disables frequency foldback when asserted. |
| TR/SS (2) | Soft-start & tracking control | Programs output voltage ramp rate via capacitor; forces FB regulation to TR/SS voltage below 0.97V for output tracking. |
| RT (3) | Frequency programming | Resistor to GND sets switching frequency from 200kHz to 2.2MHz; enables trade-off between size, efficiency, and EMI. |
| EN/UV (4) | Enable & undervoltage lockout | 1.0V rising threshold with 40mV hysteresis; allows programmable VIN UVLO using resistor divider from VIN. |
| VIN (5–7) | Main input supply | Supplies internal circuitry and top switch; must be locally bypassed with low-ESR capacitor near PGND pins. |
| PGND (8–10) | Power switch return | Return path for bottom NMOS; requires low-inductance connection to input capacitor negative terminal. |
| GND (11–14) | Analog ground reference | Connects to PCB ground plane; ties to exposed pad (Pin 29) to minimize thermal resistance and noise coupling. |
| SW (15–19) | Switch node | Drives external inductor and BST capacitor; must be minimized in PCB area to reduce EMI and switching losses. |
| BST (20) | Bootstrap supply | Provides gate drive voltage >VIN for top NMOS; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| INTVCC (21) | Internal 3.4V regulator output | Bypassed with ≥1µF ceramic capacitor; powers internal logic; draws current from BIAS if VBIAS > 3.1V. |
| BIAS (22) | Efficiency-optimized bias supply | When tied to VOUT ≥3.3V, reduces VIN current draw and improves light-load efficiency. |
| PG (23) | Power-good open-drain flag | Asserts low when VFB deviates >±9% from 0.970V or during fault; valid above 3.4V VIN regardless of EN state. |
| FB (24) | Feedback reference node | Regulated to 0.970V; connects to resistor divider tap; requires 4.7–10pF phase-lead capacitor to VOUT for stability. |
| ISP (25) | Current sense (+) | Non-inverting input of rail-to-rail current sense amplifier; monitors high-side or low-side sense resistor voltage. |
| ISN (26) | Current sense (–) | Inverting input of current sense amplifier; common-mode range extends to GND and VIN for flexible placement. |
| IMON (27) | Current monitor output | Sources VIMON = 20 × (VISP–VISN); provides ground-referenced analog current readout up to 200µA. |
| ICTRL (28) | Current limit adjustment | Modulates ISP–ISN threshold from 5mV to 50mV; float or tie to INTVCC for default 50mV full-scale limit. |
| GND (29) | Exposed thermal pad | Mandatory GND connection; soldered to PCB copper pour to achieve θJC = 5°C/W and sustain 6A continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail current sense inputs | Supports high-side, low-side, or output current monitoring with full common-mode range (GND to VIN), enabling flexible system-level protection. |
| Ultralow 3µA quiescent current | Extends battery runtime in always-on applications (e.g., telematics, ADAS sensors) without compromising regulation or ripple performance. |
| 40ns minimum on-time | Enables direct 42V-to-3.3V conversion without intermediate stages, reducing bill-of-materials and board space in high-ratio designs. |
| Adjustable 200kHz–2.2MHz switching | Allows EMI-sensitive designs (e.g., infotainment) to shift switching frequency out of critical bands while maintaining small magnetics. |
| Integrated soft-start & tracking | TR/SS pin enables controlled power-up sequencing across multiple rails and prevents inrush current in cascaded converters. |
| Low dropout under all conditions | 250mV dropout at 3A ensures regulation even during cold-crank (6V VIN) or high-temperature operation with minimal headroom loss. |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers 5V/3A display controller and audio codec in head unit with 9V–16V battery input and cold-crank down to 6V. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with current monitoring for overcurrent shutdown and load dump protection. Use Value: 3µA IQ prevents battery drain during vehicle sleep mode; 40ns min on-time maintains regulation during cold-crank events. |
Use Scenario: Generates isolated 3.3V/2A supply for microcontroller and CAN transceiver in DIN-rail mounted PLC with 24VDC field bus. IC Role / Device Role / Timing Role: High-efficiency, wide-input DC/DC converter with programmable UVLO and PG flag for system health monitoring. Use Value: 42V absolute max rating withstands 36V transients; ±9% PG flag enables reliable firmware-initiated safe shutdown on brownout. |
| CCCV Battery Charger Front-End | Medical Point-of-Care Device |
Use Scenario: Provides constant-current (CC) and constant-voltage (CV) charging for 2-cell Li-ion battery from 12V adapter, with current sense feedback to MCU. IC Role / Device Role / Timing Role: Regulated buck stage with ISP/ISN current sensing and IMON analog output for real-time charge current measurement. Use Value: Rail-to-rail ISP/ISN inputs enable accurate low-side current sensing; IMON's 20× scaling simplifies ADC interface without external op-amps. |
Use Scenario: Powers FPGA and sensor interface in portable ultrasound device with 12V external battery pack and strict 24-hour standby requirement. IC Role / Device Role / Timing Role: Ultra-low-IQ primary regulator delivering 1.2V/2A core voltage and 3.3V/1A peripheral rail via LDO post-regulation. Use Value: 3µA quiescent current minimizes self-discharge; Burst Mode keeps output ripple <10mVP-P during long idle periods without sacrificing wake-up speed. |
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 |
|---|---|---|---|
| LT8640SIV#PBF | Higher 8A output current, 2.2MHz max fSW, same 3µA IQ, but no IMON/ICTRL pins; uses different current sense architecture. | Lacks integrated current monitor output and adjustable current limit; suited for higher-current apps without analog current readout needs. | Select when >6A output or tighter EMI control at 2.2MHz is required, and current monitoring is handled externally. |
| MPQ4436AGL-AEC1-Z | Automotive-grade 6A buck with 40V max input, 17µA IQ, no current sense monitor pins, smaller 4mm × 4mm QFN. | Higher quiescent current reduces battery life in always-on systems; lacks ISP/ISN/IMON functionality for closed-loop current control. | Choose for cost-sensitive AEC-Q100 automotive applications where current monitoring is not required and 17µA IQ is acceptable. |
Compared with LT8640SIV#PBF and MPQ4436AGL-AEC1-Z, the LT8613EUDE#PBF uniquely combines 6A capability, 3µA IQ, and full current sense monitoring (ISP/ISN/IMON/ICTRL) in a compact 3mm × 6mm package-making it optimal for space-constrained, battery-sensitive systems requiring real-time current telemetry.
Availability
LT8613EUDE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and medical point-of-care devices requiring stable component supply, extended temperature operation (–40°C to 125°C), and long-term lifecycle assurance.
Supply support for LT8613EUDE#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets.
The LT8613EUDE#PBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, high-voltage monolithic DC/DC regulators designed specifically for automotive, industrial, and medical applications demanding ultralow quiescent current and robust current monitoring.
FAQ
What is the maximum input voltage rating for the LT8613EUDE#PBF?
The LT8613EUDE#PBF has an absolute maximum input voltage rating of 42V on VIN, EN/UV, PG, ISP, and ISN pins. This allows direct operation from 24V and 36V industrial buses and automotive 12V/24V systems with load dump transients. Continuous operation above 42V may cause permanent damage.
How does the LT8613EUDE#PBF achieve 3µA quiescent current?
The LT8613EUDE#PBF achieves 3µA quiescent current through optimized Burst Mode operation: during light loads, it delivers short current pulses to the output capacitor followed by extended sleep periods where most internal circuitry is powered down. This design maintains <10mVP-P ripple while minimizing average input current.
Can the LT8613EUDE#PBF synchronize to an external clock?
Yes, the LT8613EUDE#PBF supports external clock synchronization via the SYNC pin (Pin 1). When driven with a logic-level clock signal (0.7V–1.55V thresholds), it aligns switching edges to the external source and operates in pulse-skipping mode, disabling frequency foldback and sustaining full programmed frequency across all loads.
What is the function of the IMON pin on the LT8613EUDE#PBF?
The IMON pin on the LT8613EUDE#PBF outputs a ground-referenced voltage equal to 20 × (VISP – VISN). It provides real-time analog current monitoring without external amplification, supporting up to 200µA source/sink capability and enabling direct connection to MCU ADCs for closed-loop current control or diagnostics.
Does the LT8613EUDE#PBF require external compensation components?
No, the LT8613EUDE#PBF features fully internal compensation based on peak current mode control. This eliminates the need for external compensation networks, simplifies layout, and ensures stable operation with standard 3.9µH inductors and typical ceramic output capacitors across its full operating range.
LT8613EUDE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.4V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.97V
- Voltage - Output (Max):
- 41.58V
- Current - Output:
- 6A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (3x6)
LT8613EUDE#PBF FAQ
1.How can I place an order for LT8613EUDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8613EUDE#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 LT8613EUDE#PBF reliable?
The price and inventory of LT8613EUDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8613EUDE#PBF is usually 5 days.
3.What payment methods are accepted for LT8613EUDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8613EUDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8613EUDE#PBF?
LT8613EUDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8613EUDE#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 LT8613EUDE#PBF?
For technical support, including LT8613EUDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8613EUDE#PBF requirements.
6.How does Aetrix verify that LT8613EUDE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8613EUDE#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 LT8613EUDE#PBF meets industry standards.
7.What is the process for return or replacement of LT8613EUDE#PBF?
All LT8613EUDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8613EUDE#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 LT8613EUDE#PBF part is unused and in its original packaging.
Return procedure for LT8613EUDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8613EUDE#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…
