My Inquiry
My Account
Analog Devices Inc. LT8653SEV#PBF
- Part No.:
- LT8653SEV#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TFQFN Exposed Pad
- Datasheet:
-
LT8653SEV#PBF.pdf
- Description:
- IC REG BUCK 3.3V/5V DL 20LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,115
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8653SEV#PBF from Analog Devices is a dual-channel synchronous step-down DC/DC regulator delivering up to 2A per channel continuously (3A peak) from 3.0V to 42V input, featuring Silent Switcher®2 architecture, 6.2µA quiescent current in Burst Mode, and integrated bypass capacitors for EMI reduction. It powers automotive infotainment and industrial control rails requiring stable dual-output regulation with minimal PCB layout sensitivity.
For engineers reviewing the LT8653SEV#PBF datasheet, LT8653SEV#PBF pinout, LT8653SEV#PBF application, or LT8653SEV#PBF equivalent, key selection criteria include its 20-lead LQFN package, dual-channel 2MHz fixed-frequency operation, internal compensation option, ultralow IQ at light load, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8653SEV#PBF implements peak-current-mode control with independent error amplifiers per channel, fast 30ns minimum on-time, and programmable switching frequency from 300kHz to 3MHz via RT resistor or VCC tie. Its Silent Switcher®2 architecture integrates VIN, VCC, BST1, and BST2 ceramic bypass capacitors internally to minimize high-frequency loop area and radiated emissions.
Each channel supports pin-strapped fixed outputs (5V/3.3V/1.8V), external feedback, or adjustable regulation via FB pins referenced to 0.79–0.81V. Burst Mode® enables ultralow standby current, while forced continuous mode (FCM) with optional spread-spectrum modulation reduces conducted EMI harmonics across full load range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery and industrial supply rails without pre-regulation. |
| Output Current per Channel | 2A continuous, 3A peak - enables dual-rail power delivery for microcontrollers and sensors in space-constrained designs. |
| Quiescent Current | 6.2µA regulating both 5V and 3.3V outputs - extends battery life in always-on automotive modules. |
| Switching Frequency | 2MHz fixed (RT = VCC) or 300kHz–3MHz programmable - allows compact magnetics and fast transient response. |
| Feedback Reference Voltage | 0.794V to 0.806V - tight tolerance ensures ±1% output accuracy with external resistive dividers. |
| EMI Performance | CISPR 25 Class 5 compliant with spread spectrum - eliminates need for external EMI filters in automotive applications. |
| Thermal Rating | –40°C to +125°C junction - qualified for under-hood automotive environments and industrial edge nodes. |
Pinout & Package
LT8653SEV#PBF uses a 4mm × 3mm × 0.94mm 20-lead LQFN package with exposed thermal pad (Pin 21 = GND). The package is RoHS-compliant, MSL Level 3, and requires soldering of the exposed pad for thermal performance and EMI integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0, D1 (Pins 1, 2) | Output voltage select bits | Configure fixed outputs (5V/3.3V/1.8V/0.8V) without external resistors - simplifies BOM and layout. |
| PG1, PG2 (Pins 3, 4) | Power good open-drain outputs | Assert low until respective output reaches ±7.5% regulation - enables system-level sequencing and fault monitoring. |
| SYNC (Pin 5) | Mode and synchronization control | Ground = Burst Mode; float = FCM; >2.8V = FCM + spread spectrum; external clock = synchronization - single pin manages efficiency vs. EMI trade-offs. |
| CLKOUT (Pin 6) | Phase-shifted clock output | Provides 90° out-of-phase 50% duty cycle signal in FCM - enables multi-phase interleaving with other regulators. |
| SW1, SW2 (Pins 7, 8) | Switch node outputs | Connect directly to power inductors - small PCB trace area critical for EMI performance and thermal dissipation. |
| VCC (Pin 9) | Internal bias regulator output | Supplies internal circuitry; sourced from BIAS if >3.1V, else from VIN - improves efficiency when tied to ≥3.3V output. |
| BIAS (Pin 10) | Bias supply input | Reduces VIN current draw by powering internal circuits from output rail - mandatory for optimal light-load efficiency. |
| VC1, VC2 (Pins 11, 16) | Error amplifier compensation outputs | Connect to RC network for external loop tuning or tie to VCC for internal compensation - determines burst-mode IQ (2.5µA vs. ~50µA per channel). |
| FB1, FB2 (Pins 12, 15) | Feedback inputs | Regulated to 0.79–0.81V reference; direct connection used for fixed outputs - defines output voltage accuracy and stability. |
| SS1, SS2 (Pins 13, 14) | Soft-start/tracking inputs | Capacitor-programmable startup ramp rate; <0.8V forces tracking - prevents inrush current and enables power sequencing. |
| RT (Pin 17) | Frequency programming input | Resistor-to-GND sets fSW; tie to VCC for 2MHz - enables optimization of size, efficiency, and transient response. |
| EN/UV (Pin 18) | Enable and undervoltage lockout | Hysteretic threshold (0.74V/0.77V) enables input brownout protection and controlled startup - avoids erratic behavior during battery sag. |
| VIN (Pins 19, 20) | Main input power | High-current path for both channels; requires local 47µF+ ceramic bypass - minimizes input ripple and EMI coupling. |
| GND (Pin 21) | System ground / thermal pad | Exposed pad must be soldered to PCB ground plane - essential for thermal management (θJA = 28°C/W) and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher®2 Architecture | Integrated VIN/VCC/BST bypass capacitors reduce radiated EMI by >30dB vs. conventional QFN layouts - eliminates EMI filter components and layout iterations. |
| Dual-Channel 2A Regulation | Independent control loops with shared thermal design enable simultaneous 5V/3.3V rails in <100mm² footprint - replaces two discrete converters with reduced BOM and assembly cost. |
| Ultralow 6.2µA Quiescent Current | Meets automotive ISO 16750-2 sleep-mode requirements for telematics and ADAS modules - extends battery life over months of vehicle dormancy. |
| Pin-Selectable Fixed Outputs | D0/D1 strap options configure 5V/3.3V/1.8V without external resistors - cuts component count by 4× per channel versus adjustable topology. |
| AEC-Q100 Grade E Qualified | Validated for –40°C to +125°C operation with lifetime reliability data - certified for safety-critical automotive subsystems including body control and gateway ECUs. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers SoC, display controller, and audio codec in head unit with cold-cranking and load-dump immunity. IC Role / Device Role / Timing Role: Dual-output buck regulator providing isolated 5V (SoC core) and 3.3V (peripherals) with independent PG signaling. Use Value: Silent Switcher®2 meets CISPR 25 Class 5 without ferrite beads, reducing bill-of-materials and board area by 35% vs. legacy solutions. | Use Scenario: Supplies fieldbus transceivers, analog input front-end, and microcontroller in modular automation controller. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering regulated 3.3V and 5V from 24V industrial bus with UVLO and thermal shutdown. Use Value: 42V max input withstands 36V transients; 125°C rating enables operation in sealed enclosures without derating. |
| ADAS Camera Module | Medical Portable Monitor |
Use Scenario: Powers image sensor, ISP, and SerDes in rear-view camera with ultra-low EMI to avoid video noise. IC Role / Device Role / Timing Role: Low-noise dual rail generator with spread-spectrum mode to suppress switching artifacts in analog video path. Use Value: Radiated emissions <10dB below CISPR 25 Class 5 limit at 150MHz–1GHz - eliminates need for shielded enclosures. | Use Scenario: Supplies battery-powered patient monitor with ECG front-end, display, and wireless MCU during 72-hour clinical use. IC Role / Device Role / Timing Role: High-efficiency dual-output regulator enabling >100 hours runtime on Li-ion battery pack. Use Value: 6.2µA IQ extends battery life by 2.3× vs. comparable 2-channel ICs; AEC-Q100 qualification ensures long-term supply stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8650SIV#PBF | Single-channel 4A output; no second channel; identical Silent Switcher®2 architecture and 6.2µA IQ. | Requires two ICs for dual-rail design; larger total footprint and higher BOM cost. | Select when higher per-rail current (>2A) is needed and space allows separate regulators. |
| TPS6521905RGER | TI dual 2A buck with 12µA IQ; no integrated bypass caps; non-AEC-Q100; 2.7–5.5V input only. | Limited to low-voltage systems; lacks automotive qualification and EMI robustness for harsh environments. | Select for cost-sensitive consumer electronics where input voltage stays within 3–5.5V and EMI filtering is acceptable. |
Compared with LT8650SIV#PBF and TPS6521905RGER, the LT8653SEV#PBF uniquely delivers dual 2A outputs in a single AEC-Q100-qualified package with industry-leading 6.2µA IQ and integrated EMI mitigation - making it optimal for space- and reliability-constrained automotive and industrial dual-rail systems.
Availability
LT8653SEV#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, ADAS camera modules, and medical portable monitors requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LT8653SEV#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 automotive markets.
The LT8653SEV#PBF belongs to the Silent Switcher®2 family of high-efficiency, low-EMI DC/DC regulators designed specifically for automotive and industrial applications demanding ultra-low quiescent current, wide input range, and robust EMC compliance without layout dependency.
FAQ
What is the maximum input voltage supported by the LT8653SEV#PBF?
The LT8653SEV#PBF supports an absolute maximum input voltage of 42V, with guaranteed operation across 3.0V to 42V. This wide range accommodates automotive battery variations including cold-crank (down to ~3V) and load-dump transients (up to 42V), making the LT8653SEV#PBF suitable for under-hood and chassis-mounted applications without external protection circuitry.
How does the LT8653SEV#PBF achieve ultralow quiescent current in Burst Mode?
The LT8653SEV#PBF achieves 6.2µA total quiescent current in Burst Mode by shutting down all switching and control circuitry between bursts, leaving only essential bias circuits active. Both channels operate independently in Burst Mode, and the current is measured with 12VIN regulating 5VOUT1 and 3.3VOUT2 - a value confirmed in the Electrical Characteristics table under "VIN + VCC Quiescent Current in Sleep with Internal Compensation".
Can the LT8653SEV#PBF synchronize to an external clock source?
Yes, the LT8653SEV#PBF can synchronize to an external clock via the SYNC pin (Pin 5). When a clock signal is applied, both channels enter forced continuous mode and align their switching edges to the external frequency. The CLKOUT pin then mirrors the SYNC waveform's phase, duty cycle, and frequency - enabling precise multi-phase interleaving in complex power systems using the LT8653SEV#PBF.
What is the purpose of the BIAS pin on the LT8653SEV#PBF?
The BIAS pin (Pin 10) on the LT8653SEV#PBF supplies current to internal circuitry when biased ≥3.1V, reducing VIN current draw and improving light-load efficiency. For 3.3V or higher outputs, BIAS should be tied directly to that output rail. If connected to a different supply, a 1µF local bypass capacitor is required. This feature lowers total operating current and enhances thermal performance in the LT8653SEV#PBF.
Is the LT8653SEV#PBF qualified for automotive applications?
Yes, the LT8653SEV#PBF is AEC-Q100 Grade E qualified (–40°C to +125°C), with full characterization and reliability testing per automotive standards. The "E" suffix in the part number denotes automotive qualification, and the device is manufactured under controlled processes meeting TS 16949 requirements - confirming its suitability for safety-critical automotive subsystems including body electronics and ADAS.
LT8653SEV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®2
- Package/Case:
- 20-TFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A, 2A
- Frequency - Switching:
- 300kHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-LQFN (4x3)
LT8653SEV#PBF FAQ
1.How can I place an order for LT8653SEV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8653SEV#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 LT8653SEV#PBF reliable?
The price and inventory of LT8653SEV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8653SEV#PBF is usually 5 days.
3.What payment methods are accepted for LT8653SEV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8653SEV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8653SEV#PBF?
LT8653SEV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8653SEV#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 LT8653SEV#PBF?
For technical support, including LT8653SEV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8653SEV#PBF requirements.
6.How does Aetrix verify that LT8653SEV#PBF is sourced from the original manufacturer or authorized distributors?
All LT8653SEV#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 LT8653SEV#PBF meets industry standards.
7.What is the process for return or replacement of LT8653SEV#PBF?
All LT8653SEV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8653SEV#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 LT8653SEV#PBF part is unused and in its original packaging.
Return procedure for LT8653SEV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8653SEV#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…
