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Analog Devices Inc. LT8336HV#PBF
- Part No.:
- LT8336HV#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
LT8336HV#PBF.pdf
- Description:
- IC REG BOOST ADJ 2.5A 16LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,300
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Product details
Overview
LT8336HV#PBF from Analog Devices is a 40V, 2.5A synchronous step-up DC/DC converter with Silent Switcher architecture, 300kHz–3MHz programmable switching frequency, 0.3µA shutdown quiescent current, and PassThru™ mode for VIN ≥ VOUT operation-designed for automotive preboost and industrial power supplies requiring low EMI and high efficiency across wide input ranges.
For engineers reviewing the LT8336HV#PBF datasheet, LT8336HV#PBF pinout, LT8336HV#PBF application, or LT8336HV#PBF equivalent, key selection criteria include its AEC-Q100 qualification, 16-lead 3mm × 3mm LQFN package, 100% duty cycle capability in PassThru mode, spread-spectrum EMI reduction, and dual-mode light-load optimization (Burst Mode® and pulse-skipping).
Technical Context
The LT8336HV#PBF implements fixed-frequency current-mode control with internal 40V/2.5A power switches, enabling precise peak-current regulation and fast transient response. Its block diagram integrates error amplifier EA, VC node control, slope compensation, and dual-MOSFET switching logic with automatic PassThru mode activation when VIN ≥ VOUT and FB > 1.05V.
Operation modes-including Burst Mode® (0.3µA shutdown, 4µA light-load IQ), pulse-skipping, and external synchronization-are selected via the SYNC/MODE pin using five defined voltage/resistor configurations. Spread spectrum modulation (±0.45% fSW center, ±20% range) is configurable independently to suppress CISPR25 Class 5 conducted/radiated emissions without sacrificing efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 40V - supports wide-range battery and industrial bus inputs, including 12V/24V automotive systems. |
| Output Current Capability | 2.5A continuous - enables high-power boost stages without external MOSFETs or current sharing. |
| Switching Frequency Range | 300kHz to 3MHz - adjustable via RT resistor; 2MHz default ensures AM-band avoidance and compact magnetics. |
| Quiescent Current (Burst Mode) | 4µA at VIN - sustains ultra-low standby power in always-on automotive modules and IoT edge nodes. |
| PassThru Mode Threshold | VIN – VOUT ≤ 0V (rising), ≤ –0.6V (falling) - enables seamless transition to direct conduction when input exceeds output, minimizing losses. |
| FB Regulation Accuracy | ±0.6% over –40°C to 150°C - ensures stable 1V reference tracking for precision output voltage setting. |
| EMI Performance | CISPR25 Class 5 compliant - achieved via integrated Silent Switcher architecture and optional SSFM, eliminating need for external EMI filters. |
Pinout & Package
LT8336HV#PBF uses a 16-lead, 3mm × 3mm LQFN package with exposed thermal pad (Pin 17 = GND). The package meets JEDEC MSL Level 3 and supports reflow up to 260°C. Thermal resistance θJCbottom = 8.2°C/W enables high-power operation with minimal PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC/MODE (1) | Mode selection & sync input | Selects Burst Mode®, pulse-skipping, or external clock sync; ignored during PassThru or startup. |
| RT (2) | Frequency programming | Resistor-to-GND sets fSW from 300kHz–3MHz; open-circuit prohibited. |
| GND (3,5,8,17) | Power/thermal ground | Exposed pad (17) must be soldered to PCB ground plane for thermal dissipation and EMI integrity. |
| FB (4) | Feedback sensing | Monitors resistive divider output; regulates VOUT to 1.000V ±0.6% over temperature. |
| VOUT (6,7) | Boost output terminals | Dual pins reduce loop inductance; each requires dedicated 1µF ceramic capacitor to adjacent GND for Silent Switcher cancellation. |
| SW (9,10,11) | Power switch node | Connects to inductor and CBST; shared high-current path for integrated top/bottom MOSFETs. |
| BST (12) | Bootstrap supply | 0.1µF capacitor between BST and SW provides gate drive voltage for top MOSFET. |
| VIN (13) | Main input supply | Accepts 2.7V–40V; powers internal LDO (INTVCC) and switching stage. |
| EN/UVLO (14) | Enable & undervoltage lockout | 1.0V threshold with 100mV hysteresis; draws only 0.3µA when disabled. |
| INTVCC (15) | Internal 3.5V regulator bypass | Requires ≥1µF ceramic capacitor; supplies gate drivers and bias circuits-no external loading permitted. |
| PG (16) | Power good flag | Open-drain output pulled low if VOUT deviates >±8%, EN/UVLO <1V, INTVCC fault, or thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Dual VOUT/GND capacitor layout cancels magnetic fields, reducing radiated EMI by >20dB vs conventional boost converters. |
| PassThru™ Mode | 100% duty cycle operation eliminates switching losses when VIN ≥ VOUT-critical for automotive cold-crank scenarios. |
| AEC-Q100 Grade H Qualification | Rated for –40°C to +150°C junction temperature; validated for automotive powertrain and ADAS subsystems. |
| Adjustable Light-Load Operation | Burst Mode® (4µA IQ) or pulse-skipping selectable via SYNC/MODE pin-enables optimal trade-off between ripple, noise, and efficiency. |
| Integrated Compensation | Internal error amplifier compensation eliminates external components, simplifying design and improving stability margin. |
| Robust Protection Suite | Includes output overvoltage lockout, thermal shutdown, and reverse current limiting in PassThru mode (750mA max). |
Applications
| Automotive Preboost Converter | Industrial 24V Bus Booster |
|---|---|
Use Scenario: Boosting 9V–16V battery rail to stable 24V for camera modules and radar sensors during engine cranking. IC Role / Device Role / Timing Role: Primary step-up regulator with PassThru mode enabling uninterrupted operation when battery voltage exceeds 24V. Use Value: Eliminates need for external OR-ing diodes or redundant regulators; maintains <±1% output regulation under 50ms 4.5V cold-crank dips. |
Use Scenario: Generating 48V from 24V industrial PLC backplane for PoE++ or servo drive interfaces. IC Role / Device Role / Timing Role: High-current boost controller with synchronized switching to avoid interference with real-time Ethernet traffic. Use Value: Delivers 2.5A @ 48V with <15mVpp ripple at 2MHz; SSFM reduces conducted emissions below CISPR25 Class 5 limits by 12dB. |
| Low-Power IoT Sensor Node | Medical Portable Equipment Supply |
Use Scenario: Powering 3.3V/5V peripherals from single Li-ion cell (2.7V–4.2V) in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Ultra-low-IQ boost converter operating in Burst Mode® to extend battery life beyond 5 years. Use Value: Draws only 4µA at no load; achieves >85% efficiency at 100µA output current-enabling decade-long deployments. |
Use Scenario: Providing isolated 12V bias for analog front-end amplifiers in portable ultrasound devices. IC Role / Device Role / Timing Role: EMI-sensitive power stage where Silent Switcher architecture prevents RF coupling into signal chains. Use Value: Radiated emissions reduced to <30dBµV/m at 100–1000MHz-meets IEC 60601-1-2 4th Ed. immunity requirements without shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8337HV#PBF | Higher 3.5A output current rating; identical pinout, package, and feature set; shares same 3mm × 3mm LQFN footprint. | Required for loads >2.5A; supports higher output power without redesign. | Select LT8337HV#PBF when peak load exceeds 2.5A but board space and thermal constraints remain unchanged. |
| TPS61088RHLR | 2.5A rated but lacks PassThru mode, SSFM, AEC-Q100 qualification, and Silent Switcher EMI suppression; 20V max input. | Suitable for cost-sensitive consumer applications where CISPR25 compliance and automotive temp range are not required. | Choose TPS61088RHLR only for non-automotive, non-EMI-critical designs with VIN <20V and no PassThru requirement. |
Compared with LT8336HV#PBF, LT8337HV#PBF offers higher current headroom in identical form factor, while TPS61088RHLR trades EMI performance, automotive qualification, and PassThru capability for lower unit cost in less demanding environments.
Availability
LT8336HV#PBF is available at Aetrix Electronics and suitable for automotive preboost, industrial 24V bus boosting, and low-power IoT sensor node applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8336HV#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 automotive, industrial, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The LT8336HV#PBF belongs to Analog Devices' Silent Switcher® DC/DC converter product line, engineered specifically for automotive and industrial applications demanding ultra-low EMI, high efficiency across wide input ranges, and robust operation at extended temperature extremes.
FAQ
What is the maximum junction temperature rating for the LT8336HV#PBF?
The LT8336HV#PBF is qualified for operation from –40°C to +150°C junction temperature and is AEC-Q100 Grade H certified. This rating is validated per JESD22-A108 and supported by thermal metrics including θJCbottom = 8.2°C/W, enabling reliable use in under-hood automotive environments and high-ambient industrial enclosures without derating up to 150°C.
Does the LT8336HV#PBF require external compensation components?
No, the LT8336HV#PBF features fully internal compensation-no external RC network is needed on the FB or COMP pins. This simplifies layout, improves stability margin across input/output conditions, and eliminates tuning effort. All loop compensation is factory-trimmed and verified across temperature and process variations.
How does PassThru™ mode function in the LT8336HV#PBF?
In PassThru™ mode, the LT8336HV#PBF disables switching and holds the bottom MOSFET continuously on when VIN ≥ VOUT (threshold: VIN – VOUT ≤ 0V rising), effectively shorting VIN to VOUT through the inductor and MOSFET. This eliminates switching losses and reduces quiescent current to 15µA, critical for automotive start-stop and cold-crank operation.
Can the LT8336HV#PBF synchronize to an external clock, and what are the timing requirements?
Yes, the LT8336HV#PBF synchronizes to an external clock applied to the SYNC/MODE pin. It accepts digital clock signals with minimum pulse width of 100ns and frequency range of 300kHz–3MHz. When synchronized, it operates in pulse-skipping mode and maintains tight frequency alignment-essential for noise-sensitive multi-rail systems.
What is the purpose of the dual VOUT pins (6 and 7) on the LT8336HV#PBF?
The dual VOUT pins enable the Silent Switcher® architecture: one 1µF capacitor must be placed between Pin 6 (VOUT) and Pin 5 (GND), and another between Pin 7 (VOUT) and Pin 8 (GND). This creates opposing current loops that cancel magnetic field emissions-reducing radiated EMI by up to 20dB without added shielding or ferrites.
LT8336HV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 300kHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LQFN (3x3)
LT8336HV#PBF FAQ
1.How can I place an order for LT8336HV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8336HV#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 LT8336HV#PBF reliable?
The price and inventory of LT8336HV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8336HV#PBF is usually 5 days.
3.What payment methods are accepted for LT8336HV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8336HV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8336HV#PBF?
LT8336HV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8336HV#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 LT8336HV#PBF?
For technical support, including LT8336HV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8336HV#PBF requirements.
6.How does Aetrix verify that LT8336HV#PBF is sourced from the original manufacturer or authorized distributors?
All LT8336HV#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 LT8336HV#PBF meets industry standards.
7.What is the process for return or replacement of LT8336HV#PBF?
All LT8336HV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8336HV#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 LT8336HV#PBF part is unused and in its original packaging.
Return procedure for LT8336HV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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