My Inquiry
My Account
Analog Devices Inc. LT8570EMS8E-1#TRPBF
- Part No.:
- LT8570EMS8E-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8570EMS8E-1#TRPBF.pdf
- Description:
- IC REG BST CHARGE PUMP ADJ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,809
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8570EMS8E-1#TRPBF from Analog Devices (formerly Linear Technology) is a 0.25A, 65V monolithic PWM DC/DC converter IC configured as boost/SEPIC/inverting regulator for bias supply generation in space-constrained industrial and telecom systems. It features adjustable 200kHz–1.5MHz switching frequency, integrated soft-start, 2.55V–40V input range, and 1.204V positive feedback reference.
For engineers reviewing the LT8570EMS8E-1#TRPBF datasheet, LT8570EMS8E-1#TRPBF pinout, LT8570EMS8E-1#TRPBF application, or LT8570EMS8E-1#TRPBF equivalent, key selection criteria include its 0.25A current limit, MSOP-8 package thermal performance (θJA = 35–40°C/W), UVLO programmability via SHDN pin, and compatibility with ceramic output capacitors down to 0.1µF.
Technical Context
The LT8570EMS8E-1#TRPBF implements constant-frequency current-mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its dual-path FBX architecture supports both noninverting (1.204V reference) and inverting (3mV reference) configurations without external component changes.
It integrates a 65V NPN power switch with 250mV VCE(SAT) at 0.2A, frequency foldback during soft-start (1/6 nominal fOSC), and high-gain SHDN pin enabling precise undervoltage lockout using resistor dividers. The VC pin provides direct access to the error amplifier output for custom loop compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Limit | 0.25A - sets maximum peak inductor current in boost/SEPIC/inverting topologies |
| Input Voltage Range | 2.55V to 40V - supports wide-input industrial rails and battery-backed systems |
| Switching Frequency | 200kHz to 1.5MHz - enables compact magnetics; adjustable via RT pin or external SYNC clock |
| Feedback Reference | 1.204V (positive) / 3mV (negative) - determines output voltage setpoint with single RFBX |
| Quiescent Current | 1.2–1.7mA - minimizes no-load power loss in always-on bias supplies |
| Shutdown Current | 0–1µA - ensures near-zero standby consumption when disabled |
| VCE(SAT) | 250mV at 0.2A - reduces conduction loss and improves efficiency at medium loads |
Pinout & Package
LT8570EMS8E-1#TRPBF is housed in an 8-lead plastic MSOP package (MS8E) with exposed pad (Pin 9 = GND) for thermal enhancement. θJA ranges from 35°C/W to 40°C/W depending on PCB layout and copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FBX (Pin 1) | Positive/Negative Feedback Input | Accepts 1.204V reference for noninverting topologies or 3mV for inverting; sets VOUT with single resistor |
| VC (Pin 2) | Error Amplifier Output | Provides access to compensation node; requires RC network to GND for loop stability |
| VIN (Pin 3) | Main Power Input | Supplies internal circuitry and switch driver; must be locally bypassed with low-ESR capacitor |
| SW (Pin 4) | Switch Collector Node | Connects to external inductor/diode; high di/dt node requiring minimized trace area |
| SHDN (Pin 5) | Enable/UVLO Control | High-gain input accepting slow-ramping signals; 1.21V–1.40V hysteresis enables programmable lockout |
| RT (Pin 6) | Oscillator Timing Input | Resistor-to-ground sets free-running frequency; also accepts SYNC signal for external clock synchronization |
| SS (Pin 7) | Soft-Start Control | Charged by internal 280kΩ resistor; external capacitor controls ramp rate of output voltage |
| SYNC (Pin 8) | External Clock Input | Accepts 0.4V–1.3V logic levels; forces synchronization when driven above threshold |
Key Features
| Feature | Design Value |
|---|---|
| Easily reconfigurable topology | Single IC supports boost, SEPIC, and inverting converters via FBX connection - no change to IC or controller |
| User-programmable UVLO | SHDN pin accepts resistor divider from VIN to set precise turn-on/off thresholds - eliminates need for external supervisor |
| Integrated soft-start | Internal 280kΩ current source charges external SS capacitor - prevents inrush current and output overshoot |
| Frequency foldback during startup | Reduces switching frequency to 1/6 nominal value when FBX is between 300mV–920mV - improves current control at light loads |
| Thermally enhanced MSOP | Exposed pad soldered to PCB ground plane achieves θJA ≤ 40°C/W - enables 1W+ continuous operation in compact layouts |
Applications
| VFD Bias Supplies | TFT-LCD Bias Supplies |
|---|---|
Use Scenario: Generating stable ±15V to ±30V rails for vacuum fluorescent display segment drivers in industrial HMIs. IC Role / Device Role / Timing Role: Configured as inverting converter to produce negative bias from 5V or 12V system rail. Use Value: Single LT8570EMS8E-1#TRPBF replaces discrete charge-pump + LDO solution, reducing BOM count and board area by >40%. |
Use Scenario: Providing regulated 20V–25V gate drive and AVDD for TFT-LCD column drivers in portable medical monitors. IC Role / Device Role / Timing Role: Operated in SEPIC mode to maintain regulation across varying battery voltage (3.0V–4.2V) while delivering fixed output. Use Value: Inherent output disconnect in SEPIC topology prevents backfeed during shutdown - critical for safety-critical displays. |
| GPS Receivers | DSL Modems |
Use Scenario: Generating low-noise 3.3V LNA supply from 5V USB power in GPS front-end modules. IC Role / Device Role / Timing Role: Used in boost configuration with ceramic output capacitor and shielded inductor to minimize EMI. Use Value: 1.5MHz max switching frequency allows use of <1µH inductors - reduces radiated emissions near 1.575GHz GPS band. |
Use Scenario: Creating isolated ±12V bias for line-driver amplifiers in DSL transceivers operating from 12V wall adapter. IC Role / Device Role / Timing Role: Configured as inverting converter with dual inductors to achieve ultra-low output ripple (<5mVPP). Use Value: Dual-inductor topology delivers continuous output current during both switch phases - eliminates ripple spikes that distort ADSL signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8580IMS8E-1#TRPBF | Same 0.25A/65V switch but adds spread-spectrum modulation and improved light-load efficiency | Better EMI compliance in noise-sensitive RF environments; higher cost and larger footprint | Select when meeting CISPR-22 Class B emissions is mandatory and budget allows premium feature set |
| TPS61088RHLR | 0.5A/20V switch, 2.7V–12V input, integrated MOSFETs, no inverting/SEPIC support | Limited to boost-only; unsuitable for negative or buck-boost applications requiring input/output overlap | Choose only for simple 3.3V/5V boost from Li-ion where 65V capability and topology flexibility are unnecessary |
Compared with LT8570EMS8E-1#TRPBF, LT8580IMS8E-1#TRPBF offers superior EMI performance at the cost of design complexity, while TPS61088RHLR sacrifices topology versatility and voltage range for higher current density in basic boost applications.
Availability
LT8570EMS8E-1#TRPBF is available at Aetrix Electronics and suitable for VFD bias supplies, TFT-LCD bias supplies, GPS receivers, and DSL modems requiring stable component supply with guaranteed long-term continuity.
Supply support for LT8570EMS8E-1#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 and maintains full product support, documentation, and manufacturing continuity for all Linear DC/DC converter families.
The LT8570 family was designed specifically for compact, high-voltage bias supply generation in space-constrained industrial, telecom, and instrumentation applications where topology flexibility and robust input voltage range are essential.
FAQ
What is the maximum output voltage achievable with LT8570EMS8E-1#TRPBF in boost configuration?
The LT8570EMS8E-1#TRPBF does not impose a hard upper limit on output voltage in boost mode; practical maximum is determined by external component ratings and layout parasitics. With proper selection of 65V-rated diode, capacitor, and inductor, outputs up to 60V are routinely achieved. The 65V switch rating defines the absolute ceiling for SW node voltage, not VOUT directly.
Can LT8570EMS8E-1#TRPBF be used in SEPIC topology with coupled inductors?
Yes, LT8570EMS8E-1#TRPBF supports SEPIC with either coupled or uncoupled inductors. When using coupled inductors, correct phasing must be observed per Figure 1 in the datasheet. Coupling improves efficiency and reduces size but requires careful winding polarity verification - the LT8570EMS8E-1#TRPBF itself imposes no coupling requirement.
How is undervoltage lockout programmed on LT8570EMS8E-1#TRPBF?
UVLO is programmed using a resistor divider from VIN to SHDN pin. The LT8570EMS8E-1#TRPBF triggers at 1.21V (falling) and 1.40V (rising) with 40mV hysteresis. For example, a 1MΩ–220kΩ divider from 12V yields ~2.18V at SHDN - enabling operation only above ~11.1V input.
What is the minimum output capacitor value recommended for LT8570EMS8E-1#TRPBF?
The datasheet specifies 0.1µF as the minimum ceramic output capacitance for LT8570EMS8E-1#TRPBF. This value ensures sufficient phase margin and transient response stability across the full load range. Larger values (up to 2.2µF) further reduce ripple but require verification of ESR/ESL impact on loop dynamics.
Does LT8570EMS8E-1#TRPBF support synchronization to external clock sources?
Yes, LT8570EMS8E-1#TRPBF supports full synchronization via the SYNC pin (Pin 8). It accepts TTL/CMOS-compatible clocks with high level ≥1.3V and low level ≤0.4V, duty cycle 35–65%, and frequency within 200kHz–1.5MHz. Driving SYNC below 0.4V reverts to internal oscillator operation.
LT8570EMS8E-1#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, Charge Pump, 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:
- 375mA (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
LT8570EMS8E-1#TRPBF FAQ
1.How can I place an order for LT8570EMS8E-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8570EMS8E-1#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 LT8570EMS8E-1#TRPBF reliable?
The price and inventory of LT8570EMS8E-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8570EMS8E-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8570EMS8E-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8570EMS8E-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8570EMS8E-1#TRPBF?
LT8570EMS8E-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8570EMS8E-1#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 LT8570EMS8E-1#TRPBF?
For technical support, including LT8570EMS8E-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8570EMS8E-1#TRPBF requirements.
6.How does Aetrix verify that LT8570EMS8E-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8570EMS8E-1#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 LT8570EMS8E-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8570EMS8E-1#TRPBF?
All LT8570EMS8E-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8570EMS8E-1#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 LT8570EMS8E-1#TRPBF part is unused and in its original packaging.
Return procedure for LT8570EMS8E-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8570EMS8E-1#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…
