My Inquiry
My Account
Analog Devices Inc. LT8570HMS8E#TRPBF
- Part No.:
- LT8570HMS8E#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8570HMS8E#TRPBF.pdf
- Description:
- IC REG BOOST CUK ADJ 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8570HMS8E#TRPBF from Analog Devices (formerly Linear Technology) is a 65V, 0.5A monolithic PWM DC/DC converter IC supporting boost, SEPIC, and inverting topologies. It features an adjustable 200kHz–1.5MHz switching frequency, integrated soft-start, synchronization capability, and user-configurable undervoltage lockout. Designed for high-reliability bias supplies in TFT-LCD and VFD displays, it operates across –40°C to 150°C junction temperature.
For engineers reviewing the LT8570HMS8E#TRPBF datasheet, LT8570HMS8E#TRPBF pinout, LT8570HMS8E#TRPBF application, or LT8570HMS8E#TRPBF equivalent, key selection criteria include its 65V switch rating, 0.5A current limit, MSOP-8 thermal performance (θJA = 35–40°C/W), and dual feedback architecture enabling both positive and negative output configurations.
Technical Context
The LT8570HMS8E#TRPBF employs constant-frequency current-mode control with internal slope compensation to ensure stability at duty cycles >50%. Its dual-path error amplifier (A1/A2) dynamically selects between 1.204V reference (noninverting) or 3mV reference (inverting) based on FBX pin voltage polarity, enabling seamless topology reconfiguration without external logic.
It integrates frequency foldback during soft-start (reducing fOSC to 1/6 nominal) and a high-gain SHDN pin accepting slowly ramping enable signals (1.21V–1.40V threshold with 40mV hysteresis). The 280kΩ internal SS charging resistor and 100ns minimum on/off times support precise startup control in high-input-voltage industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Voltage Rating | 65V - supports input-to-output differential up to 65V, enabling 40V input → 105V boost or 36V input → –29V inverting rails |
| Switch Current Limit | 0.5A - sets maximum peak inductor current; enables ≥125mA continuous output at 12V boost from 5V with >85% efficiency |
| Input Voltage Range | 2.55V to 40V - accommodates wide-range industrial inputs including 3.3V, 5V, 12V, 24V, and 36V supply rails |
| Switching Frequency Range | 200kHz to 1.5MHz - allows EMI optimization and compact magnetics; RT resistor sets free-running frequency or sync accepts external clock |
| Feedback Reference | 1.204V (positive) or 3mV (negative) - enables single-resistor VOUT programming for both boost/SEPIC and inverting topologies |
| Junction Temperature Range | –40°C to 150°C - qualified for under-hood automotive, industrial motor drives, and high-ambient lighting systems |
| Quiescent Current | 1.7mA (active), 1µA (shutdown) - minimizes standby power loss in battery-backed or always-on bias supplies |
Pinout & Package
LT8570HMS8E#TRPBF is housed in an 8-lead plastic MSOP package (3mm × 3mm footprint, 0.65mm pitch) with exposed pad (Pin 9) soldered to PCB ground for thermal enhancement (θJA = 35–40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FBX (Pin 1) | Configurable feedback input | Accepts either positive (1.204V ref) or negative (3mV ref) feedback; determines topology via resistor connection to VOUT |
| VC (Pin 2) | Error amplifier output | Connects to RC network for loop compensation; sets peak switch current via voltage-controlled PWM comparator |
| VIN (Pin 3) | Main power input | Supplies internal circuitry and switch driver; requires local 0.47–1µF ceramic decoupling |
| SW (Pin 4) | Switch collector node | Drives external inductor/diode; low 250mV VCE(SAT) at 0.4A reduces conduction loss |
| SHDN (Pin 5) | Enable/disable control | Hysteresis-enabled input (1.21V–1.40V) supports slow-ramping supplies and programmable UVLO via resistor divider |
| RT (Pin 6) | Oscillator timing | Resistor-to-ground sets free-running frequency; open-circuit disables oscillator |
| SS (Pin 7) | Soft-start capacitor node | Internal 280kΩ current source charges external cap to ~2.1V; controls ramp rate of output voltage |
| SYNC (Pin 8) | External clock input | Accepts 0.4V–1.3V logic-level clock; overrides internal oscillator when driven above 1.3V |
Key Features
| Feature | Design Value |
|---|---|
| Triple topology support | Single IC implements boost, SEPIC, or inverting converters via external component reconfiguration-no change to IC or layout required |
| Programmable UVLO | SHDN pin bias and threshold allow resistor-divider-based input undervoltage lockout tailored to system brownout requirements |
| Frequency foldback | Reduces switching frequency to 1/6 nominal during soft-start, lowering minimum duty cycle and improving startup reliability into heavy loads |
| Thermally enhanced MSOP | Exposed pad and low θJA enable 1.5W+ power dissipation at 100°C ambient without heatsink in compact space-constrained designs |
| Pin compatibility | Direct replacement for LT3580 and LT8580 in existing MSOP-8 layouts-same pinout, same footprint, same thermal pad connection |
Applications
| TFT-LCD Bias Supply | VFD Display Driver |
|---|---|
Use Scenario: Generating +15V and –10V rails for LCD gate/source drivers in industrial HMIs and medical displays. IC Role / Device Role / Timing Role: Configured as dual-output SEPIC-inverting hybrid to deliver isolated positive/negative bias from a single 12V rail. Use Value: Eliminates need for separate boost and inverting ICs; 65V switch withstands transient surges on 12V bus; 150°C rating ensures reliability in sealed enclosures. |
Use Scenario: Powering vacuum fluorescent display segments requiring stable 24V–30V anode voltage and –5V cathode bias. IC Role / Device Role / Timing Role: Operated as high-efficiency boost converter (5V → 28V) with synchronized switching to reduce EMI near sensitive analog front-ends. Use Value: Adjustable frequency avoids noise bands in audio-sensitive applications; soft-start prevents filament inrush damage during cold start. |
| GPS Receiver LNA Bias | DSL Line Card DC-DC |
Use Scenario: Providing ultra-low-noise 5V bias to low-noise amplifiers in automotive GPS modules exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Used in low-ripple inverting configuration (12V → –5V) with shielded inductors and ceramic filtering. Use Value: 150°C qualification ensures operation at 125°C PCB ambient; 0.5A switch supports burst-mode LNA current spikes without dropout. |
Use Scenario: Generating isolated ±12V rails for DSL line interface circuits in telecom access equipment with strict thermal limits. IC Role / Device Role / Timing Role: Deployed as dual SEPIC regulators-one for +12V, one for –12V-sharing common input and SYNC signal for ripple cancellation. Use Value: Synchronization enables interleaved operation reducing input/output capacitor RMS current; MSOP package fits dense line card layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3589EUF#PBF | 4-output buck-boost PMIC with I2C interface; lower 20V switch rating; no inverting capability | Targeted at multi-rail portable systems; lacks 65V tolerance and topology flexibility | Select only if digital control and multiple outputs outweigh need for high-voltage inverting/SEPIC operation |
| LT8330EMSE#TRPBF | 60V, 1.5A monolithic boost/SEPIC/inverting converter; higher current, larger 16-lead MSE package | Better suited for >200mA loads; requires PCB redesign due to different pinout and thermal pad layout | Choose when higher output current or improved thermal margin justifies layout change and cost increase |
Compared with LTC3589EUF#PBF and LT8330EMSE#TRPBF, LT8570HMS8E#TRPBF uniquely balances 65V capability, 0.5A current, triple-topology support, and MSOP-8 compactness-making it optimal for space-constrained, high-input-voltage bias supplies where programmability and thermal robustness are critical.
Availability
LT8570HMS8E#TRPBF is available at Aetrix Electronics and suitable for TFT-LCD bias supplies, VFD display drivers, and GPS receiver LNA bias applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8570HMS8E#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8570 product line was designed specifically for high-voltage, multi-topology DC/DC bias generation in display, instrumentation, and telecom infrastructure-emphasizing ruggedness, configurability, and thermal resilience over consumer-grade integration.
FAQ
What topology configurations does the LT8570HMS8E#TRPBF support?
The LT8570HMS8E#TRPBF supports three distinct DC/DC topologies: boost, SEPIC, and inverting-each implemented using the same LT8570HMS8E#TRPBF IC by changing only external passive components. Its dual-reference FBX pin (1.204V for noninverting, 3mV for inverting) enables automatic amplifier path selection, eliminating need for external mode control logic or additional ICs.
How does the LT8570HMS8E#TRPBF handle thermal stress in high-ambient environments?
The LT8570HMS8E#TRPBF is rated for operation up to 150°C junction temperature and packaged in an MSOP-8 with exposed thermal pad (Pin 9) that must be soldered to PCB ground. Its θJA of 35–40°C/W enables reliable 1.5W+ power dissipation at 100°C board ambient-critical for under-hood automotive displays or sealed industrial enclosures where forced airflow is unavailable.
Can the LT8570HMS8E#TRPBF be synchronized to an external clock, and what are the voltage thresholds?
Yes, the LT8570HMS8E#TRPBF supports external clock synchronization via the SYNC pin (Pin 8). A logic-high signal exceeding 1.3V and logic-low below 0.4V will override the internal oscillator. The SYNC input accepts duty cycles from 35% to 65%, and the recommended minimum fSYNC/fOSC ratio is 3/4 to ensure stable locking-enabling EMI reduction through frequency alignment in multi-rail systems.
What is the purpose of the SHDN pin's hysteresis, and how is UVLO programmed?
The SHDN pin of the LT8570HMS8E#TRPBF features 40mV hysteresis (1.21V rising, 1.27V falling) to reject noise and support slowly ramping enable signals. UVLO is programmed by connecting a resistor divider from VIN to SHDN-setting turn-on at VIN × R2/(R1+R2) > 1.40V and turn-off at < 1.21V. This allows system-specific brownout protection without external comparators.
Does the LT8570HMS8E#TRPBF require external compensation, and what is the standard network?
Yes, the LT8570HMS8E#TRPBF requires external compensation connected between VC (Pin 2) and GND. A standard network uses a series RC (5k–50kΩ + 470pF–2.2nF) in parallel with a 10pF–100pF capacitor. A typical starting point is 6.19kΩ + 1nF series, shunted by 47pF-adjustable via potentiometer while observing load-transient response to optimize phase margin and damping.
LT8570HMS8E#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):
- 0.003V, 1.204V
- Voltage - Output (Max):
- 65V (Switch)
- Current - Output:
- 500mA (Switch)
- Frequency - Switching:
- 200kHz ~ 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
LT8570HMS8E#TRPBF FAQ
1.How can I place an order for LT8570HMS8E#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8570HMS8E#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 LT8570HMS8E#TRPBF reliable?
The price and inventory of LT8570HMS8E#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8570HMS8E#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8570HMS8E#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8570HMS8E#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8570HMS8E#TRPBF?
LT8570HMS8E#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8570HMS8E#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 LT8570HMS8E#TRPBF?
For technical support, including LT8570HMS8E#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8570HMS8E#TRPBF requirements.
6.How does Aetrix verify that LT8570HMS8E#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8570HMS8E#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 LT8570HMS8E#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8570HMS8E#TRPBF?
All LT8570HMS8E#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8570HMS8E#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 LT8570HMS8E#TRPBF part is unused and in its original packaging.
Return procedure for LT8570HMS8E#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8570HMS8E#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…
