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Analog Devices Inc. LT8692SIV#TRPBF
- Part No.:
- LT8692SIV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TFQFN Exposed Pad
- Datasheet:
-
LT8692SIV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ QUAD 20LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,375
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Product details
Overview
LT8692SIV#TRPBF from Analog Devices is a quad-channel monolithic synchronous step-down regulator with one 42V/2A high-voltage channel and three 8V/1A low-voltage channels, operating at a fixed 2MHz switching frequency. It integrates Silent Switcher® 2 technology with on-die bypass capacitors, delivers <10mVPk-Pk output ripple, achieves up to 95% efficiency, and supports AEC-Q100 automotive qualification for camera modules and infotainment systems.
For engineers reviewing the LT8692SIV#TRPBF datasheet, LT8692SIV#TRPBF pinout, LT8692SIV#TRPBF application, or LT8692SIV#TRPBF equivalent, key selection considerations include its dual-input architecture (VIN1: 3–42V; VIN234: 1.2–8V), ultralow 9.6μA quiescent current in Burst Mode, spread spectrum modulation capability, and thermally enhanced 4mm × 3mm LQFN-20 package with exposed GND pad.
Technical Context
The LT8692SIV#TRPBF implements current-mode control across all four channels, synchronized to a single internal 2MHz oscillator. Channel 1 uses independent VIN1 input and features top/bottom NMOS FETs with 250mΩ/120mΩ RDS(on), while Channels 2–4 share VIN234 and use 170mΩ/65mΩ switches. All channels regulate to a precise 0.8V feedback reference with ±7.5% PG threshold accuracy.
It supports three operational modes: Burst Mode (SYNC = 0V) for ultralow IQ, forced continuous mode (SYNC = float or ≥2.8V), and spread spectrum modulation (SYNC = INTVCC). EN/UVLO and individual EN pins provide programmable undervoltage lockout and power sequencing, with hysteresis of 20mV on all enable inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | VIN1: 3V–42V; VIN234: 1.2V–8V - enables flexible multi-rail architectures with HV primary and LV secondary supplies |
| Output Current Capability | CH1: 2A continuous; CH2–CH4: 1A each - supports mixed-voltage SoC/FPGA core and I/O rail requirements |
| Switching Frequency | 2MHz (±10%) - allows compact 1–1.5μH inductors and reduces EMI fundamental energy above AM band |
| Quiescent Current | 9.6μA (all channels regulating) - extends battery life in always-on automotive camera or ADAS subsystems |
| Feedback Reference Voltage | 0.800V ±10mV - ensures tight output regulation across temperature and load for precision analog rails |
| EMI Performance | CISPR 25 Class 5 compliant with integrated capacitors and spread spectrum - eliminates need for external EMI filters in space-constrained designs |
| Thermal Rating | Junction temp: –40°C to +125°C; θJA = 40°C/W - validated for under-hood automotive environments with minimal heatsinking |
Pinout & Package
LT8692SIV#TRPBF is housed in a thermally enhanced 4mm × 3mm × 0.94mm 20-lead LQFN package with exposed GND pad (Pin 21), requiring soldering to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | High-voltage input supply | Primary input for CH1; powers internal bias circuits; requires ≥1µF local ceramic decoupling |
| EN/UVLO (Pin 2) | Global enable & UVLO input | Hysteretic 0.74V/0.76V threshold enables programmable VIN1 shutdown; must not be floated |
| EN1 (Pin 3) | Channel 1 enable | 0.68V threshold allows per-channel sequencing or UVLO via resistor divider from VIN1 |
| EN4–EN2 (Pins 4–6) | Channels 4–2 enable inputs | Identical 0.68V thresholds; support independent enable/disable and power-up sequencing |
| FB1–FB4 (Pins 7–10) | Output voltage feedback inputs | Each regulates to 0.8V reference; connect to resistor dividers to set VOUT (e.g., 5V, 3.3V, 1.8V, 1.2V) |
| INTVCC (Pin 11) | Internal regulator bypass | Supplies internal logic; sourced from VIN234 if >3.1V, else from VIN1; no external loading permitted |
| SYNC (Pin 12) | Mode control & sync input | 0V = Burst Mode; float = FCM; ≥2.8V = FCM+SSM; 1.6–2.5MHz external clock accepted |
| SW4–SW2 (Pins 13–15) | Low-voltage channel switch nodes | Connect directly to respective inductors; short PCB traces critical for EMI and efficiency |
| VIN234 (Pin 16) | Shared low-voltage input | Supply for CH2–CH4; typically tied to CH1 output (e.g., 5V); requires ≥1µF local decoupling |
| SW1 (Pin 17) | High-voltage channel switch node | CH1 power switch output; connects to main inductor; demands shortest possible trace routing |
| BST1 (Pin 18) | CH1 bootstrap capacitor terminal | Optional 0.22μF BST–SW1 capacitor improves top-FET gate drive; not required due to integrated caps |
| PG (Pin 19) | Power good open-drain output | Pulled low if any enabled FB is outside ±7.5% regulation or during UVLO/thermal fault |
| GND (Exposed Pad, Pin 20) | System ground & thermal path | Mandatory solder connection to PCB GND plane for EMI suppression and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® 2 architecture | Integrated VIN1, VIN234, INTVCC, and BST bypass capacitors reduce layout sensitivity and guarantee CISPR 25 Class 5 compliance without added filters |
| Quad-channel synchronization | Single 2MHz oscillator locks all four regulators, eliminating beat frequencies and simplifying EMI filtering |
| Ultralow IQ Burst Mode | 9.6μA total input current with all outputs regulated enables >10-year battery life in always-on vehicle cameras |
| Flexible power sequencing | Individual EN pins with 0.68V thresholds allow cascaded startup (e.g., EN2 tied to FB1) for controlled SoC rail ramp-up |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with full parametric testing - suitable for front-end ADAS and infotainment ECUs |
Applications
| Automotive Camera Modules | ADAS Domain Controllers |
|---|---|
Use Scenario: Powering image sensor, ISP, and MIPI interface in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Quad-output PMIC delivering 5V (sensor), 3.3V (ISP), 1.8V (MIPI PHY), and 1.2V (core) from 12V battery with tight transient response. Use Value: Integrated Silent Switcher 2 eliminates need for external EMI filters, reducing BOM cost and PCB area by >30% versus discrete solutions. | Use Scenario: Supplying multiple voltage rails for radar processor, Ethernet switch, and CAN FD transceivers in centralized ADAS domain ECU. IC Role / Device Role / Timing Role: High-efficiency, low-noise power source with programmable sequencing to meet ISO 26262 functional safety boot requirements. Use Value: AEC-Q100 qualification and ±7.5% PG accuracy ensure reliable power-good signaling for ASIL-B system monitoring. |
| Industrial Vision Systems | Medical Imaging Sensors |
Use Scenario: Powering high-resolution CMOS sensors and FPGA-based preprocessing units in factory automation cameras. IC Role / Device Role / Timing Role: Compact 4-channel buck supplying 5V (sensor bias), 3.3V (FPGA I/O), 1.8V (FPGA core), and 1.2V (DDR termination) from 24V industrial bus. Use Value: 2MHz operation enables use of small 1.2μH inductors, allowing full power solution within 12mm² footprint. | Use Scenario: Providing ultra-low-noise, stable rails for X-ray detector ASICs and analog front-ends in portable ultrasound devices. IC Role / Device Role / Timing Role: Low-ripple (<10mVPk-Pk) quad regulator powering noise-sensitive analog signal chains and digital processing cores. Use Value: Spread spectrum modulation and integrated capacitors achieve <30dB lower radiated emissions than standard buck converters at 100MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8691SIV#TRPBF | Single-channel 42V/2A Silent Switcher 2 buck; no CH2–CH4 or VIN234 input | Only suitable when only one high-voltage rail is needed; cannot replace quad functionality | Select only if design requires only CH1 functionality and space for three additional regulators is available |
| TPS6521905RGER | 3.3V/2A + 1.8V/2A + 1.2V/2A triple buck; max input 5.5V; no HV channel or AEC-Q100 rating | Limited to low-voltage applications; unsuitable for direct 12V/24V/42V battery input | Consider only for non-automotive, low-input-voltage systems where HV capability is unnecessary |
Compared with LT8691SIV#TRPBF and TPS6521905RGER, the LT8692SIV#TRPBF uniquely integrates both high-voltage and low-voltage regulation in one AEC-Q100-qualified package, eliminating inter-regulator timing skew and reducing total solution size by >40% versus multi-chip alternatives.
Availability
LT8692SIV#TRPBF is available at Aetrix Electronics and suitable for automotive camera modules, ADAS domain controllers, and industrial vision systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LT8692SIV#TRPBF 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.
The LT8692SIV#TRPBF belongs to the Silent Switcher® 2 family of high-efficiency, low-EMI DC/DC regulators, designed specifically for noise-sensitive automotive and industrial applications demanding compact, robust, and certified power solutions.
FAQ
What is the maximum input voltage supported by LT8692SIV#TRPBF on its high-voltage channel?
The LT8692SIV#TRPBF supports up to 42V on its VIN1 pin, enabling direct connection to automotive 12V, 24V, and 42V battery rails. Absolute maximum rating is 42V; operation above 37V disables FCM mode to prevent input overvoltage conditions. This makes LT8692SIV#TRPBF suitable for start-stop and load-dump tolerant designs in automotive camera modules and ADAS ECUs.
How does LT8692SIV#TRPBF achieve ultralow quiescent current in Burst Mode?
The LT8692SIV#TRPBF achieves 9.6μA total input quiescent current in Burst Mode by shutting down most internal circuitry between switching pulses while maintaining regulation via output capacitor hold-up. Each channel contributes ~5.8μA in sleep state, and pulse frequency scales inversely with load. This behavior is confirmed in Figure G15/G16 of the LT8692S datasheet and enables multi-year battery life in always-on LT8692SIV#TRPBF-powered systems.
Can LT8692SIV#TRPBF synchronize to an external clock, and what is the acceptable frequency range?
Yes, LT8692SIV#TRPBF accepts external synchronization via its SYNC pin across 1.6MHz to 2.5MHz. When an external clock is applied, the device operates in forced continuous mode with cycle-by-cycle alignment to the master source. This capability is explicitly specified in the Electrical Characteristics table (SYNC Frequency: 1.6–2.5MHz) and enables deterministic EMI reduction in systems with multiple switching regulators, such as those using LT8692SIV#TRPBF alongside other Analog Devices power ICs.
What is the purpose of the integrated capacitors in LT8692SIV#TRPBF's Silent Switcher® 2 architecture?
The integrated capacitors in LT8692SIV#TRPBF - including VIN1, VIN234, INTVCC, and BST bypass elements - minimize high-frequency AC current loop area inside the package. This reduces magnetic field radiation and eliminates sensitivity to PCB layout parasitics, enabling guaranteed CISPR 25 Class 5 compliance without external EMI filters. These capacitors are part of the second-generation Silent Switcher® implementation and are intrinsic to the LT8692SIV#TRPBF die/package structure.
Is LT8692SIV#TRPBF qualified for automotive applications, and what grade does it meet?
Yes, LT8692SIV#TRPBF is AEC-Q100 qualified for automotive applications and meets Grade 1 specifications (–40°C to +125°C junction temperature). The "I" in the part number denotes industrial/automotive temperature range, and the datasheet explicitly states automotive qualification in the ORDER INFORMATION table. This certification covers thermal, ESD, and reliability testing required for front-end camera, infotainment, and ADAS applications where LT8692SIV#TRPBF is deployed.
LT8692SIV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 1.2V, 3V
- Voltage - Input (Max):
- 8V, 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 8V, 42V
- Current - Output:
- 1A, 1A, 1A, 2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-LQFN (4x3)
LT8692SIV#TRPBF FAQ
1.How can I place an order for LT8692SIV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8692SIV#TRPBF 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 LT8692SIV#TRPBF reliable?
The price and inventory of LT8692SIV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8692SIV#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8692SIV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8692SIV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8692SIV#TRPBF?
LT8692SIV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8692SIV#TRPBF 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 LT8692SIV#TRPBF?
For technical support, including LT8692SIV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8692SIV#TRPBF requirements.
6.How does Aetrix verify that LT8692SIV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8692SIV#TRPBF 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 LT8692SIV#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8692SIV#TRPBF?
All LT8692SIV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8692SIV#TRPBF, 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 LT8692SIV#TRPBF part is unused and in its original packaging.
Return procedure for LT8692SIV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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