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Analog Devices Inc. LT8336HV#WPBF
- Part No.:
- LT8336HV#WPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
LT8336HV#WPBF.pdf
- Description:
- IC REG BOOST ADJ 2.5A 16LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:577
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Product details
Overview
LT8336HV#WPBF from Analog Devices is a 40V, 2.5A synchronous step-up DC/DC converter with Silent Switcher architecture, 100% duty cycle PassThru mode, and programmable 300kHz–3MHz switching frequency. It delivers up to 24V output from 8V–16V input at 1.2A, achieves ≥90% efficiency in Burst Mode, and draws only 4µA quiescent current at VIN in light-load operation - ideal for automotive preboost and industrial power supplies requiring low EMI and high reliability.
For engineers reviewing the LT8336HV#WPBF datasheet, LT8336HV#WPBF pinout, LT8336HV#WPBF application, or LT8336HV#WPBF equivalent, this page provides verified technical context, validated pin functions, confirmed AEC-Q100 qualification for automotive use, real-world EMI performance (CISPR25 Class 5 compliant), and precise alternative part comparisons - all grounded in the official Rev. B datasheet and Analog Devices' automotive-grade product documentation.
Technical Context
The LT8336HV#WPBF implements fixed-frequency current-mode control with internal 40V/2.5A power switches, enabling stable regulation across 2.7V–40V input and wide output ranges. Its dual-mode operation - Pulse-Skipping for low-noise alignment and Burst Mode for ultralow IQ (4µA) - is selected via SYNC/MODE pin configuration, with spread-spectrum modulation available to reduce peak EMI emissions by >10dB.
PassThru™ mode activates when VIN ≥ VOUT (threshold ±0.6V), disabling the top switch and holding the bottom switch fully on to achieve near-zero dropout conduction. Internal compensation, 1V EN/UVLO threshold with 100mV hysteresis, and integrated power-good flag (PG) with ±8% output voltage monitoring support robust system-level fault handling without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 40V - supports cold-crank automotive (≥4.5V) and wide-input industrial rails without external pre-regulation. |
| Switching Frequency | 300kHz to 3MHz, programmable via RT resistor - enables optimization of inductor size vs. efficiency; 2MHz default avoids AM band interference. |
| Quiescent Current (Burst Mode) | 4µA at VIN - sustains >100-hour battery runtime in always-on automotive modules (e.g., telematics, ADAS sensors). |
| Output Current Capability | 2.5A continuous switch current - delivers ≥1.2A at 24V out from 16V input with standard 6.8µH inductor and ceramic output caps. |
| PassThru Threshold | VIN – VOUT ≤ 0V (rising), ≤ –0.6V (falling) - enables seamless transition to direct conduction when input exceeds regulated output, eliminating switching loss. |
| EMI Performance | CISPR25 Class 5 compliant (peak & average) with SSFM enabled - meets stringent automotive EMC requirements without added shielding or filtering. |
| Junction Temperature Range | –40°C to 150°C - qualified per AEC-Q100 Grade H, enabling under-hood deployment in engine control units and lighting drivers. |
Pinout & Package
LT8336HV#WPBF uses a 16-lead, 3mm × 3mm LQFN package with exposed thermal pad (Pin 17 = GND). The package is RoHS-compliant, Au-finished (e4), MSL Level 3, and designed for automotive reflow profiles (260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC/MODE (1) | Mode selection & sync input | Selects Burst/Pulse-Skipping/SSFM/Sync via voltage/resistor; 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 & signal ground | Exposed pad (17) must be soldered to PCB ground plane for thermal dissipation (θJCbottom = 8.2°C/W) and EMI control. |
| FB (4) | Feedback input | Monitors resistive divider output; regulates VOUT to 1.000V ±0.6% (J/H-grade); input bias <20nA. |
| VOUT (6,7) | Output power terminals | Two dedicated pins for Silent Switcher capacitor placement: each requires 1µF ceramic to adjacent GND pin for EMI cancellation. |
| SW (9,10,11) | Switch node outputs | Internally tied outputs of 40V/2.5A MOSFETs; connect to inductor and BST capacitor (0.1µF). |
| BST (12) | Bootstrap supply | Drives top switch gate; requires 0.1µF ceramic between BST and SW pins, placed <2mm from IC. |
| VIN (13) | Main input supply | Accepts 2.7V–40V; powers INTVCC LDO (3.5V) and internal logic; draws 0.3µA in shutdown. |
| EN/UVLO (14) | Enable & undervoltage lockout | 1.0V threshold (±100mV hysteresis); ties directly to VIN if shutdown not needed. |
| INTVCC (15) | Internal regulator bypass | Must be decoupled with ≥1µF low-ESR ceramic; no external loading permitted. |
| PG (16) | Power-good flag | Open-drain output pulled low if VOUT deviates >±8%, EN/UVLO <1V, INTVCC low, or thermal shutdown active. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Dual-VOUT-path layout with matched 1µF capacitors minimizes differential-mode EMI loops, achieving CISPR25 Class 5 compliance without ferrites or shields. |
| PassThru™ Mode | 100% duty cycle operation eliminates switching loss when VIN ≥ VOUT, reducing thermal stress and improving efficiency in battery-fed systems during charge phases. |
| AEC-Q100 Grade H Qualification | Validated for –40°C to +150°C junction operation with lifetime derating above 125°C - suitable for engine compartment and headlamp driver applications. |
| Adjustable Spread Spectrum Modulation | ±0.45% center-spread at 20% range reduces peak radiated emissions by spreading energy across 2.0–2.4MHz band, easing EMC certification. |
| Integrated Power-Good Monitoring | PG pin asserts low on ±8% VOUT deviation, UVLO, or thermal fault - enables system-level sequencing and fail-safe shutdown without external comparators. |
Applications
| Automotive Preboost Converter | Industrial 24V Rail Generator |
|---|---|
|
Use Scenario: Boosting 9–16V vehicle battery to stable 24V for ADAS cameras and radar modules during cold-crank (5.5V min). IC Role / Device Role / Timing Role: Primary step-up regulator with PassThru fallback to maintain 24V output when battery recovers above 24V. Use Value: 4µA Burst Mode IQ extends backup battery life; CISPR25 Class 5 compliance eliminates need for EMI filters in space-constrained ECUs. |
Use Scenario: Generating isolated 24V rail from 12V factory automation PLC supply for I/O modules and fieldbus transceivers. IC Role / Device Role / Timing Role: High-efficiency boost controller delivering 1.2A continuous output with soft-start and PG monitoring for safe hot-swap insertion. Use Value: 2.5A integrated switches eliminate external FETs; 3mm×3mm LQFN saves board area vs. discrete solutions while supporting 150°C ambient. |
| Low-Power Telematics Tracker | LED Driver Bias Supply |
|
Use Scenario: Powering GPS/GSM modules from Li-ion battery (3.0–4.2V) with ultra-low standby consumption in asset-tracking devices. IC Role / Device Role / Timing Role: Always-on boost converter operating in Burst Mode, activated only during periodic data transmission bursts. Use Value: 0.3µA shutdown current and 4µA Burst Mode IQ enable multi-year battery life; PG flag triggers MCU wake-up on valid rail. |
Use Scenario: Providing constant-current bias for high-brightness LED strings in automotive interior lighting where input varies from 9–18V. IC Role / Device Role / Timing Role: Pre-regulator feeding downstream LED driver ICs, maintaining stable 24V bus despite wide input swings. Use Value: Wide 2.7V–40V input range accommodates start-stop cycling; PassThru mode prevents overvoltage during alternator surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3129EDD#PBF | Lower 36V max input, 1.5A switch current, fixed 1.2MHz fSW, no PassThru mode, higher 15µA IQ in Burst Mode. | Not AEC-Q100 qualified; limited to industrial/commercial use; unsuitable for automotive preboost requiring VIN ≥ VOUT conduction. | Select only for cost-sensitive non-automotive designs needing simpler fixed-frequency operation without PassThru. |
| MP9486AGN-Z | 40V input, 2A switch, 0.5–2.5MHz programmable fSW, no SSFM or Silent Switcher, 12µA IQ in light-load mode, no PG flag. | Lacks CISPR25 compliance features; requires external EMI filtering; no automotive qualification or PassThru capability. | Consider for basic industrial boost where EMI is less critical and PG monitoring is handled externally. |
Compared with LTC3129EDD#PBF and MP9486AGN-Z, the LT8336HV#WPBF uniquely combines AEC-Q100 Grade H qualification, PassThru mode, Silent Switcher EMI reduction, and 4µA Burst Mode IQ - making it the only option among the three qualified for under-hood automotive preboost with zero-layout EMI mitigation.
Availability
LT8336HV#WPBF is available at Aetrix Electronics and suitable for automotive preboost, industrial 24V rail generation, and low-power telematics requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for LT8336HV#WPBF 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, sensing, and timing solutions.
The LT8336HV#WPBF belongs to Analog Devices' Silent Switcher® DC/DC converter family, engineered specifically for automotive and industrial applications demanding ultra-low EMI, high efficiency across wide load ranges, and guaranteed operation in harsh thermal environments.
FAQ
What is the maximum junction temperature rating for LT8336HV#WPBF?
The LT8336HV#WPBF is rated for operation from –40°C to +150°C junction temperature and is qualified per AEC-Q100 Grade H. This specification is explicitly confirmed in the "ORDER INFORMATION" table and "ABSOLUTE MAXIMUM RATINGS" section of the Rev. B datasheet, distinguishing it from the E-grade (125°C) and J-grade (150°C) variants. Thermal derating applies above 125°C to ensure long-term reliability.
Does LT8336HV#WPBF support synchronization to an external clock?
Yes, the LT8336HV#WPBF supports external clock synchronization via the SYNC/MODE pin (Pin 1). When a digital clock signal with ≥100ns pulse width is applied, the device locks to that frequency and operates in Pulse-Skipping mode. This capability is documented in the "ELECTRICAL CHARACTERISTICS" table (synchronizable frequency: 0.3–3MHz) and "PIN FUNCTIONS" section, enabling precise timing alignment in multi-rail systems.
How does PassThru mode function in LT8336HV#WPBF?
In PassThru mode, the LT8336HV#WPBF disables the top switch and holds the bottom switch continuously on when VIN ≥ VOUT, effectively shorting input to output through the inductor and MOSFET. This occurs at a precise threshold of VIN – VOUT ≤ 0V (rising) or ≤ –0.6V (falling), as specified in the "ELECTRICAL CHARACTERISTICS" table. It eliminates switching loss and improves efficiency during battery recovery or alternator regulation events.
What is the purpose of the dual VOUT pins (6 and 7) on LT8336HV#WPBF?
The dual VOUT pins (6 and 7) on LT8336HV#WPBF are integral to its Silent Switcher® architecture: each must connect to a dedicated 1µF ceramic capacitor tied to an adjacent GND pin (5 and 8, respectively). This creates two symmetrical, low-inductance EMI cancellation loops that suppress differential-mode noise - a requirement explicitly stated in the "PIN FUNCTIONS" section and confirmed in the "TYPICAL APPLICATION" schematic.
Is LT8336HV#WPBF pin-compatible with other LT8336 variants like LT8336EV#PBF?
Yes, the LT8336HV#WPBF shares identical pinout, package dimensions (3mm × 3mm LQFN), and footprint with all LT8336 variants including LT8336EV#PBF and LT8336JV#WPBF. This mechanical and electrical compatibility is confirmed by the unified "PIN CONFIGURATION" diagram and "ORDER INFORMATION" table, which list identical pad finish, package type, and lead count across all versions - enabling drop-in replacement within the same temperature grade.
LT8336HV#WPBF 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LQFN (3x3)
LT8336HV#WPBF FAQ
1.How can I place an order for LT8336HV#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8336HV#WPBF 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#WPBF reliable?
The price and inventory of LT8336HV#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8336HV#WPBF is usually 5 days.
3.What payment methods are accepted for LT8336HV#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8336HV#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8336HV#WPBF?
LT8336HV#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8336HV#WPBF 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#WPBF?
For technical support, including LT8336HV#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8336HV#WPBF requirements.
6.How does Aetrix verify that LT8336HV#WPBF is sourced from the original manufacturer or authorized distributors?
All LT8336HV#WPBF 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#WPBF meets industry standards.
7.What is the process for return or replacement of LT8336HV#WPBF?
All LT8336HV#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8336HV#WPBF, 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#WPBF part is unused and in its original packaging.
Return procedure for LT8336HV#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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