My Inquiry
My Account
Analog Devices Inc. LT8580IMS8E#TRPBF
- Part No.:
- LT8580IMS8E#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8580IMS8E#TRPBF.pdf
- Description:
- IC REG BOOST CUK ADJ 1.2A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,525
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8580IMS8E#TRPBF from Analog Devices is a PWM DC/DC converter IC with an integrated 1A, 65V NPN power switch, configurable as boost, SEPIC, or inverting topology. It operates from 2.55V to 40V input, delivers up to 12V output at 200mA in typical boost configuration, and features adjustable 200kHz–1.5MHz switching frequency, soft-start, and synchronization capability - used in TFT-LCD bias supplies and GPS receivers.
For engineers reviewing the LT8580IMS8E#TRPBF datasheet, LT8580IMS8E#TRPBF pinout, LT8580IMS8E#TRPBF application, or LT8580IMS8E#TRPBF equivalent, key selection considerations include its 8-lead MSOP package with exposed GND pad, ±3mV negative FBX reference for inverting operation, 400mV VCE(SAT) at 0.75A, user-programmable UVLO via SHDN pin, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LT8580IMS8E#TRPBF employs constant-frequency current-mode control with internal slope compensation, enabling stable operation up to 50% duty cycle and supporting discontinuous conduction mode for extended voltage range. Its dual-amplifier FBX architecture (A1 active in noninverting, A2 active in inverting mode) allows single-resistor output setting using either +1.204V or –3mV reference.
Startup sequencing integrates three coordinated functions: precision SHDN threshold (1.21V–1.40V hysteresis), SS pin ramp via internal 280kΩ resistor charging external capacitor, and frequency foldback (1/6× nominal fOSC) when FBX is between 300mV–920mV - collectively ensuring controlled inrush and robust light-load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.55V to 40V - supports wide industrial and automotive supply rails including 12V and 24V systems. |
| Switch Rating | 1A, 65V NPN - enables high-voltage boost (e.g., 5V→12V) and SEPIC topologies with input spanning output. |
| Switch VCE(SAT) | 400mV at 0.75A - reduces conduction loss and thermal stress during high-current pulses. |
| Feedback Reference | +1.204V (noninverting) or –3mV (inverting) - allows single-RFBX output setting for both polarity configurations. |
| Switching Frequency | 200kHz to 1.5MHz (free-running or synchronized) - permits EMI optimization and compact magnetics design. |
| Operating Temp Range | –40°C to +125°C (I-grade) - qualified for under-hood automotive and industrial embedded environments. |
| Package | 8-lead MSOP with exposed GND pad - provides low θJA (35–40°C/W) and reliable thermal dissipation. |
Pinout & Package
LT8580IMS8E#TRPBF uses the MS8E 8-lead plastic MSOP package with exposed GND pad (Pin 9), requiring soldering to PCB ground plane for thermal and electrical performance. θJA = 35–40°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FBX (1) | Positive/Negative Feedback Input | Accepts +1.204V reference for boost/SEPIC or –3mV reference for inverting topology; sets output via single resistor RFBX. |
| VC (2) | Error Amplifier Output | Connects external RC compensation network; controls loop stability and transient response. |
| VIN (3) | Main Power Input | Supplies internal circuitry and switch driver; requires local 2.2µF ceramic bypass capacitor. |
| SW (4) | Switch Collector Node | Drives external inductor/diode; high di/dt node - minimize trace area to reduce EMI. |
| SHDN (5) | Enable/UVLO Control Input | Active-high logic with 40mV hysteresis; enables programmable undervoltage lockout via resistor divider. |
| RT (6) | Oscillator Timing Input | Resistor-to-ground sets free-running frequency (e.g., 56.2kΩ → 1.5MHz); open-circuit disables oscillator. |
| SS (7) | Soft-Start Capacitor Terminal | Charged by internal 280kΩ resistor to ~2.1V; external capacitor (100nF–1µF) controls startup slew rate. |
| SYNC (8) | External Clock Input | Accepts 0.4V–1.3V logic levels; synchronizes switching to external clock or reverts to internal oscillator if <0.4V. |
| GND (9, Exposed Pad) | Power & Signal Ground | Must be soldered to PCB ground plane - critical for thermal management and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Topology Flexibility | Single IC supports boost, SEPIC, and dual-inductor inverting configurations - eliminates need for multiple part numbers across power architectures. |
| Programmable UVLO | SHDN pin accepts slow-ramping inputs and enables user-defined turn-on threshold via resistor divider - simplifies system-level power sequencing. |
| Frequency Foldback | Reduces switching frequency to 1/6× nominal during soft-start (FBX = 300–920mV) - improves minimum duty cycle control and prevents current runaway. |
| High-Gain SHDN Interface | Input bias current <56µA at 3V and hysteresis of 40mV - compatible with microcontroller GPIOs and resistive sensing without external buffering. |
| AEC-Q100 Qualification | I-grade (–40°C to +125°C) version LT8580IMS8E#TRPBF meets automotive reliability standards - suitable for infotainment, ADAS sensors, and body electronics. |
Applications
| TFT-LCD Bias Supply | GPS Receiver Power |
|---|---|
Use Scenario: Generating ±15V rails from 3.3V or 5V battery input for LCD source/gate drivers in automotive displays. IC Role / Device Role / Timing Role: Configured as dual-inductor inverting converter to deliver low-ripple negative output while maintaining isolation from input. Use Value: Single-chip solution replaces discrete charge-pump + LDO combinations, reducing BOM count and board area by >40%. |
Use Scenario: Providing stable 3.3V supply to GPS RF front-end and baseband ICs in portable navigation devices. IC Role / Device Role / Timing Role: Operated as boost converter (3.0V→3.3V) with tight line/load regulation and low quiescent current (1.7mA). Use Value: Maintains GPS lock during battery voltage sag (down to 2.55V VIN) and supports fast wake-up from shutdown (<100µs). |
| VFD Display Driver Supply | DSL Modem Local Power |
Use Scenario: Generating 24V–40V anode supply for vacuum fluorescent displays in industrial HMIs and test equipment. IC Role / Device Role / Timing Role: Used in high-duty-cycle boost configuration with 1.5MHz switching to minimize inductor size. Use Value: Achieves >85% efficiency at 100mA load with 15µH inductor, enabling compact 3mm × 3mm layout footprint. |
Use Scenario: Creating isolated 5V/12V auxiliary rails for DSL line drivers and PHY ICs in residential gateways. IC Role / Device Role / Timing Role: Configured as SEPIC to tolerate input transients (e.g., 12V±30%) while maintaining regulated output. Use Value: Inherent input-output isolation prevents fault propagation; 65V switch rating withstands 40V surge events per GR-1089. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3780EMS#TRPBF | 4-switch synchronous buck-boost controller (external MOSFETs); no integrated switch; supports 4–36V input. | Requires external high-side/low-side FETs and gate drivers; higher efficiency (>92%) but larger solution size. | Choose LTC3780EMS#TRPBF when >2A output current or >90% efficiency is required; not drop-in compatible. |
| LT3580EMS8E#TRPBF | Pin-compatible predecessor with identical pinout and function; lower max switching frequency (1MHz vs 1.5MHz) and no AEC-Q100 grade. | Same PCB layout usable; lacks frequency foldback and has reduced thermal margin (θJA = 45°C/W). | LT3580EMS8E#TRPBF is a legacy alternative where 1MHz fOSC suffices and automotive qualification is unnecessary. |
Compared with LT3580EMS8E#TRPBF, the LT8580IMS8E#TRPBF adds 500kHz higher max frequency, frequency foldback, and AEC-Q100 qualification - enabling smaller magnetics and automotive deployment. Versus LTC3780EMS#TRPBF, it trades external FET flexibility for integration simplicity and lower component count in sub-1A applications.
Availability
LT8580IMS8E#TRPBF is available at Aetrix Electronics and suitable for TFT-LCD bias supplies, GPS receiver power management, and DSL modem local power generation requiring stable component supply across automotive, industrial, and communications end markets.
Supply support for LT8580IMS8E#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 industrial, automotive, communications, and healthcare markets since 1965.
The LT8580IMS8E#TRPBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters designed for high-voltage, multi-topology power conversion in space-constrained and thermally demanding applications.
FAQ
What is the maximum output current achievable with the LT8580IMS8E#TRPBF in boost configuration?
The LT8580IMS8E#TRPBF integrates a 1A, 65V NPN switch with typical VCE(SAT) of 400mV at 0.75A. In boost topology, practical continuous output current is limited to ~200mA at 12V due to thermal constraints in the 8-lead MSOP package and duty-cycle-dependent current limit (1.2A at 50% duty cycle, derating at higher D). Peak pulsed loads may reach 300mA briefly with adequate heatsinking.
Can the LT8580IMS8E#TRPBF be used in an inverting configuration, and how is the output voltage set?
Yes, the LT8580IMS8E#TRPBF supports inverting topology using its dual-reference FBX pin. For negative output, connect RFBX from VOUT to FBX to pull the pin to –3mV reference; calculate RFBX = (|VOUT| + 3mV) / 83.3µA. This eliminates need for external op-amps or level-shifters - the same IC and pinout configure both polarities.
What is the purpose of the SYNC pin on the LT8580IMS8E#TRPBF, and what voltage levels are required?
The SYNC pin on the LT8580IMS8E#TRPBF allows synchronization of the internal oscillator to an external clock source to reduce EMI or coordinate multiple converters. It requires a logic-high level ≥1.3V and logic-low ≤0.4V, with 35–65% duty cycle tolerance. Driving SYNC below 0.4V reverts operation to the internal free-running oscillator set by the RT resistor.
How does the SHDN pin function on the LT8580IMS8E#TRPBF, and can it implement programmable undervoltage lockout?
The SHDN pin on the LT8580IMS8E#TRPBF provides enable/disable control with precise thresholds: device activates above 1.40V and shuts down below 1.21V (40mV hysteresis). By connecting a resistor divider from VIN to SHDN, users program custom UVLO turn-on voltage - e.g., 100kΩ/200kΩ divider sets activation at ~25V input, enabling system-level brownout protection.
Is the LT8580IMS8E#TRPBF pin-compatible with earlier versions, and what are the key improvements?
Yes, the LT8580IMS8E#TRPBF is pin-compatible with the LT3580EMS8E#TRPBF, sharing identical MSOP-8 pinout and basic functionality. Key improvements include extended switching frequency range (200kHz–1.5MHz vs 200kHz–1MHz), added frequency foldback during soft-start, tighter FBX reference (±1.204V vs ±1.21V), and AEC-Q100 qualification for automotive use - all without PCB layout changes.
LT8580IMS8E#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Boost, Cuk, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.55V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 65V (Switch)
- Current - Output:
- 1.2A (Switch)
- Frequency - Switching:
- 200kHz ~ 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
LT8580IMS8E#TRPBF FAQ
1.How can I place an order for LT8580IMS8E#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8580IMS8E#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 LT8580IMS8E#TRPBF reliable?
The price and inventory of LT8580IMS8E#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8580IMS8E#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8580IMS8E#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8580IMS8E#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8580IMS8E#TRPBF?
LT8580IMS8E#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8580IMS8E#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 LT8580IMS8E#TRPBF?
For technical support, including LT8580IMS8E#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8580IMS8E#TRPBF requirements.
6.How does Aetrix verify that LT8580IMS8E#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8580IMS8E#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 LT8580IMS8E#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8580IMS8E#TRPBF?
All LT8580IMS8E#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8580IMS8E#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 LT8580IMS8E#TRPBF part is unused and in its original packaging.
Return procedure for LT8580IMS8E#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8580IMS8E#TRPBF 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…
