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Analog Devices Inc. LT8336EV#WPBF
- Part No.:
- LT8336EV#WPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
LT8336EV#WPBF.pdf
- Description:
- IC REG BOOST ADJ 2.5A 16LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:540
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Product details
Overview
LT8336EV#WPBF from Analog Devices is a low-quiescent-current, synchronous step-up DC/DC converter with Silent Switcher architecture and PassThru™ operation. It integrates 40V/2.5A power switches, operates from 2.7V to 40V input, delivers up to 40V output, supports 300kHz–3MHz programmable switching frequency, and achieves 0.3µA shutdown current - ideal for automotive pre-boost and industrial battery-powered systems requiring ultra-low standby power and EMI-constrained environments.
For engineers reviewing the LT8336EV#WPBF datasheet, LT8336EV#WPBF pinout, LT8336EV#WPBF application, or LT8336EV#WPBF equivalent, key selection criteria include its 100% duty-cycle PassThru capability, AEC-Q100 qualification (Grade E, –40°C to 125°C), integrated spread-spectrum modulation, dual VOUT pins for EMI cancellation, and 4µA Burst Mode quiescent current at light load.
Technical Context
The LT8336EV#WPBF employs fixed-frequency current-mode control with internal slope compensation and dual MOSFET drivers. Its architecture enables seamless transition between boost and PassThru modes when VIN ≥ VOUT, maintaining regulation via synchronous rectification without external diode.
It features a dedicated SYNC/MODE pin supporting five configurations - including Burst Mode, Pulse-Skipping, SSFM, and external clock synchronization - and integrates internal compensation, soft-start, power-good flag (PG), and overvoltage lockout, eliminating need for external loop compensation or supervision ICs in most designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 40V - supports wide-range battery and automotive rail inputs, including cold-crank (4.5V) and load-dump (36V) conditions. |
| Output Voltage Range | Up to 40V - programmable via FB resistor divider; regulated by 1.000V ±0.6% reference for <±1% output accuracy. |
| Switching Frequency | 300kHz to 3MHz - set by RT resistor; 2MHz typical in automotive applications to avoid AM band interference. |
| Quiescent Current | 4µA in Burst Mode - enables >1-year battery life in always-on sensor nodes with µA-level average load. |
| PassThru Threshold | VIN – VOUT ≤ 0V (rising), ≤ –0.6V (falling) - enables lossless conduction path when input exceeds output, reducing heat and improving efficiency. |
| EMI Performance | CISPR 25 Class 5 compliant - achieved via Silent Switcher layout (dual VOUT pins + matched capacitors) and optional spread-spectrum modulation. |
| Thermal Rating | Junction temperature range: –40°C to 125°C - qualified per AEC-Q100 Grade E for under-hood automotive use. |
Pinout & Package
LT8336EV#WPBF uses a 16-lead, 3mm × 3mm LQFN package with exposed thermal pad (Pin 17 = GND). The package is RoHS-compliant, e4 Au finish, MSL Level 3, and thermally optimized with θJCbottom = 8.2°C/W.
| 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 disables operation. |
| GND (3,5,8,17) | Power & signal ground | Multiple GND pins + exposed pad ensure low-impedance return path for high di/dt SW node and thermal dissipation. |
| FB (4) | Feedback input | Monitors output via resistive divider; 1.000V reference enables precise output setting with <±1% tolerance. |
| VOUT (6,7) | Boost output terminals | Dual pins enable symmetric Silent Switcher capacitor placement (1µF each to adjacent GND pins) for EMI cancellation. |
| SW (9,10,11) | Power switch node | Three paralleled pins reduce resistance and inductance for 2.5A continuous switch current and fast edge control. |
| BST (12) | Bootstrap supply | Drives top MOSFET gate; requires 0.1µF ceramic capacitor between BST and SW for reliable high-side turn-on. |
| VIN (13) | Main input supply | Accepts 2.7V–40V; powers internal LDO (INTVCC) and supplies energy to inductor during boost phase. |
| EN/UVLO (14) | Enable & undervoltage lockout | 1.0V threshold with 100mV hysteresis; allows programmable VIN turn-on/off using external resistor divider. |
| INTVCC (15) | Internal 3.5V regulator bypass | Must be decoupled with ≥1µF ceramic cap; powers gate drivers and bias circuits - no external loading permitted. |
| PG (16) | Power good indicator | Open-drain output pulled low if VOUT deviates >±8%, EN/UVLO <1V, INTVCC fault, or thermal shutdown occurs. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® Architecture | Dual VOUT pins + matched 1µF capacitors create opposing EMI fields, reducing peak radiated emissions by >30dB vs conventional boosters. |
| PassThru™ Operation | 100% duty cycle enabled when VIN ≥ VOUT - eliminates switching losses and reduces thermal stress in battery backup or wide-input scenarios. |
| Low-IQ Burst Mode | 4µA VIN quiescent current at light load - extends runtime in always-on IoT sensors and telematics modules without compromising start-up time. |
| AEC-Q100 Qualified | Grade E (–40°C to 125°C) qualification confirmed - meets automotive reliability, HTOL, and ESD requirements for front-end power rails. |
| Integrated Spread Spectrum | ±0.45% modulation depth over ±20% fSW range - suppresses narrowband EMI peaks without requiring external modulators or complex layout changes. |
| Internal Compensation | No external compensation network required - simplifies design, reduces BOM count, and improves production yield across temperature and process variation. |
Applications
| Automotive Pre-Boost Converter | Industrial Battery Backup System |
|---|---|
Use Scenario: Boosts 9–16V vehicle battery to stable 24V rail for ADAS cameras and radar modules during cold-crank (4.5V transients). IC Role / Device Role / Timing Role: Primary DC/DC regulator with PassThru fallback to maintain 24V output even when battery dips below 24V. Use Value: Eliminates need for secondary buck converter; 0.3µA shutdown current preserves battery during long parking periods. |
Use Scenario: Powers 12V PLC I/O modules from 3.6V LiSOCl₂ primary battery with multi-year shelf life requirement. IC Role / Device Role / Timing Role: High-efficiency step-up controller enabling <10µA system sleep current through Burst Mode optimization. Use Value: Dual VOUT pins and SSFM meet CISPR 25 Class 5 limits without shielding - critical for certified industrial field devices. |
| Medical Portable Monitor Supply | Smart Meter Auxiliary Rail Generator |
Use Scenario: Generates isolated 5V/3.3V rails from single 3.7V Li-ion cell in handheld diagnostic equipment. IC Role / Device Role / Timing Role: Primary non-isolated boost stage feeding downstream isolated DC/DC; soft-start prevents inrush into sensitive analog circuitry. Use Value: 15µA PassThru quiescent current ensures >24h runtime in emergency mode with display off and only BLE active. |
Use Scenario: Supplies 3.3V microcontroller and RF transceiver from 1.8–3.6V alkaline battery stack in AMI smart meters. IC Role / Device Role / Timing Role: Low-noise, low-EMI boost converter synchronized to MCU clock to avoid spectral interference with NB-IoT transmission. Use Value: SYNC/MODE pin enables deterministic pulse-skipping alignment - reduces conducted noise coupling into meter's precision metrology ADC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8337EV#WPBF | Higher 3.5A switch current rating; identical pinout and feature set; wider 2.5V–40V input range. | Better suited for >1.5A output loads or higher VIN minima (e.g., 2.5V coin-cell start-up). | Select LT8337EV#WPBF when output current exceeds 1.2A or input may drop below 2.7V. |
| TPS61088RHLR | 2.7V–12V input only; 3.5A switch; no PassThru, no SSFM, no AEC-Q100; smaller 3mm × 2mm QFN. | Limited to consumer-grade portable electronics; lacks automotive qualification and EMI mitigation features. | Choose TPS61088RHLR only for cost-sensitive, non-automotive, sub-12V-input applications where EMI is not regulated. |
Compared with LT8337EV#WPBF, the LT8336EV#WPBF offers lower quiescent current (4µA vs 6µA Burst Mode) and tighter FB reference (±0.6% vs ±1.5%), making it superior for ultra-low-power automotive sensing; versus TPS61088RHLR, it provides full automotive qualification, PassThru, and CISPR 25 compliance - essential for safety-critical or EMI-regulated deployments.
Availability
LT8336EV#WPBF is available at Aetrix Electronics and suitable for automotive pre-boost, industrial battery backup, and medical portable monitor power supply applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8336EV#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 industrial, automotive, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The LT8336 belongs to Analog Devices' Silent Switcher® DC/DC converter product line, designed specifically for EMI-sensitive automotive and industrial applications requiring high efficiency, low IQ, and robust operation across extreme temperature and voltage ranges.
FAQ
What is the maximum output voltage supported by the LT8336EV#WPBF?
The LT8336EV#WPBF supports output voltages up to 40V, limited by its internal 40V power switches and absolute maximum ratings. Output is set via the FB resistor divider referenced to the 1.000V internal bandgap; stable regulation is maintained across load, line, and temperature when proper compensation and layout guidelines are followed. The LT8336EV#WPBF does not include overvoltage protection beyond its internal 40V switch rating - external OVLO is recommended for safety-critical systems.
Does the LT8336EV#WPBF require external compensation components?
No, the LT8336EV#WPBF features fully internal compensation - no external Type II or Type III compensation network is needed. This simplifies design, reduces bill-of-materials count, and improves consistency across manufacturing lots and temperature variations. All loop stability is handled internally, verified across the full operating range (–40°C to 125°C) and input/output conditions specified in the datasheet. The LT8336EV#WPBF maintains stable operation with standard ferrite-core inductors and ceramic output capacitors.
How does PassThru™ mode operate in the LT8336EV#WPBF?
In PassThru™ mode, the LT8336EV#WPBF disables switching and turns on the bottom MOSFET continuously while keeping the top MOSFET off, effectively shorting VIN to VOUT through the inductor and synchronous switch. This occurs automatically when VIN rises above VOUT (with hysteresis), reducing conduction loss to <75mΩ and eliminating switching losses. The LT8336EV#WPBF draws only 15µA in this state and maintains regulation solely via the feedback loop's ability to detect and hold VOUT within ±8%.
Is the LT8336EV#WPBF pin-compatible with other members of the LT833x family?
Yes, the LT8336EV#WPBF shares identical pinout, package (16-lead 3mm × 3mm LQFN), and footprint with LT8337EV#WPBF and LT8330EV#WPBF. However, differences exist in switch current rating (2.5A vs 3.5A vs 1.5A), input voltage minimum (2.7V vs 2.5V vs 2.8V), and feature subsets (e.g., LT8330 lacks SSFM). The LT8336EV#WPBF is not pin-compatible with non-LT833x boost converters such as TPS61088 or MAX17222 due to differing pin functions and internal architectures.
What layout practices are critical for achieving CISPR 25 Class 5 compliance with the LT8336EV#WPBF?
To meet CISPR 25 Class 5, the LT8336EV#WPBF requires strict adherence to Silent Switcher layout rules: place two 1µF X7R ceramic capacitors - one between Pin 6 (VOUT) and Pin 5 (GND), another between Pin 7 (VOUT) and Pin 8 (GND) - with minimal trace length and direct connection to the exposed pad. The inductor must be placed adjacent to SW pins, and the BST capacitor must be <2mm from Pin 12 to SW. Ground plane integrity beneath the IC and thermal pad soldering are mandatory. The LT8336EV#WPBF achieves Class 5 only when these layout constraints are met and SSFM is enabled.
LT8336EV#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 ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LQFN (3x3)
LT8336EV#WPBF FAQ
1.How can I place an order for LT8336EV#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8336EV#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 LT8336EV#WPBF reliable?
The price and inventory of LT8336EV#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8336EV#WPBF is usually 5 days.
3.What payment methods are accepted for LT8336EV#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8336EV#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8336EV#WPBF?
LT8336EV#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8336EV#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 LT8336EV#WPBF?
For technical support, including LT8336EV#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8336EV#WPBF requirements.
6.How does Aetrix verify that LT8336EV#WPBF is sourced from the original manufacturer or authorized distributors?
All LT8336EV#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 LT8336EV#WPBF meets industry standards.
7.What is the process for return or replacement of LT8336EV#WPBF?
All LT8336EV#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8336EV#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 LT8336EV#WPBF part is unused and in its original packaging.
Return procedure for LT8336EV#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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