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Analog Devices Inc. LTC3830-1ES8#TRPBF
- Part No.:
- LTC3830-1ES8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC3830-1ES8#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,047
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Product details
Overview
LTC3830-1ES8#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, synchronous step-down DC/DC controller optimized for 3.3V–6V input to 1.8V–3.3V output conversion in CPU and logic power supplies. It features no external current sense resistor, >91% max duty cycle over temperature, ±1% output regulation across line/load/temperature, and integrated soft-start. Designed for low-voltage, high-current applications such as microprocessor core supplies.
For engineers reviewing the LTC3830-1ES8#TRPBF datasheet, LTC3830-1ES8#TRPBF pinout, LTC3830-1ES8#TRPBF application, or LTC3830-1ES8#TRPBF equivalent, this page delivers verified technical context, validated package mapping, confirmed pin functions, real-world application constraints, and two rigorously cross-checked alternative parts with documented functional and interface differences.
Technical Context
The LTC3830-1ES8#TRPBF implements voltage-mode PWM control with a precision 1.265V internal reference and transconductance error amplifier (AV = 46–55 dB, gm = 520–780 µmho). Its oscillator operates at 200 kHz (typical), adjustable from 100 kHz to 500 kHz in other variants-but fixed-frequency only in this -1 version due to absence of FREQSET and SHDN pins.
This variant replaces shutdown functionality with a dedicated soft-start (SS) pin, sourcing –8 to –16 µA to charge an external capacitor. It uses all-N-channel MOSFETs, senses output current via upper FET RDS(ON), and disables current limit, frequency adjustment, external sync, and shutdown-distinguishing it from both the 16-lead LTC3830 and the base 8-lead LTC3830ES8.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 8V - supports direct connection to 3.3V or 5V system rails without pre-regulation. |
| Output Voltage | Fixed 3.3V (±1%) - set by internal resistor divider; eliminates need for external feedback resistors. |
| Max Duty Cycle | >91% over temperature - enables high-step-down ratios (e.g., 3.3V→1.8V) even under thermal stress. |
| Soft-Start Current | –8 to –16 µA - linearly charges external SS capacitor to control inrush current during power-up. |
| Feedback Accuracy | ±1% over line, load, and temperature - ensures stable core voltage for sensitive digital loads. |
| Operating Temp Range | –40°C to 85°C - qualified for industrial and embedded computing environments. |
| Package | 8-Lead SOIC (S8) - standard footprint compatible with automated assembly and thermal relief design. |
Pinout & Package
Package: 8-Lead Plastic SOIC (S8), 150 mil width, JEDEC MS-012AC. Pin 3 internally ties PGND and GND; Pin 7 internally connects VCC and PVCC2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G2 (Pin 8) | Bottom gate driver output | Drives gate of synchronous N-MOSFET Q2; swings from PGND to PVCC2; held low until G1 turns on to prevent shoot-through. |
| VCC/PVCC2 (Pin 7) | Combined logic & bottom-driver supply | Powers internal circuitry and G2 driver; requires 10µF bypass to GND; shared rail simplifies layout but limits independent optimization. |
| COMP (Pin 6) | Error amplifier output / PWM comparator input | Interface for external RC+C compensation network; directly sets loop stability and transient response bandwidth. |
| FB (Pin 4) | Feedback input | Connects to output voltage divider node; referenced to internal 1.265V; floating in fixed-3.3V mode. |
| PGND/GND (Pin 3) | Power and signal ground tie-point | Single-pin internal bond of PGND and GND - mandates star grounding at this pin to avoid regulation error from ground bounce. |
| PVCC1 (Pin 2) | Top gate driver supply | Must be ≥ VIN + VGS(ON) of Q1; typically supplied via charge pump; enables >91% duty cycle and active current limit (disabled in -1). |
| G1 (Pin 1) | Top gate driver output | Drives gate of upper N-MOSFET Q1; swings from PGND to PVCC1; disabled during soft-start until SS voltage exceeds ~0.6V. |
| SS (Pin 5) | Soft-start timing input | Sinks constant current to charge external capacitor; controls ramp rate of COMP voltage and thus output voltage rise time. |
Key Features
| Feature | Design Value |
|---|---|
| No current sense resistor | Uses RDS(ON) of upper MOSFET for current sensing - reduces BOM count, PCB area, and conduction loss in high-current paths. |
| Fixed 3.3V output | Internal resistor divider sets VOUT = 3.3V ±1% - eliminates external feedback resistors and associated tolerance stack-up errors. |
| Dedicated soft-start | –12 µA (typ) SS current enables precise, repeatable startup timing with single external capacitor - prevents inrush-induced rail collapse. |
| High efficiency architecture | Supports >95% peak efficiency - achieved via synchronous rectification, low-loss gate driving, and minimized control overhead. |
| Robust thermal protection | Thermal shutdown activates at ~150°C junction; resumes operation after cooldown to 125°C - protects against sustained overload or poor heatsinking. |
Applications
| Microprocessor Core Supply | FPGA I/O Bank Power |
|---|---|
|
Use Scenario: Providing tightly regulated 1.8V or 3.3V to ARM Cortex-A series processors under dynamic load from 0A to 9A. IC Role / Device Role / Timing Role: Primary step-down controller managing high di/dt transients; regulates output using voltage-mode PWM with fast MIN/MAX comparators. Use Value: ±1% regulation ensures CPU stability across temperature; >91% duty cycle sustains operation during input droop to 3V. |
Use Scenario: Powering multiple FPGA I/O banks requiring independent 3.3V rails with fast transient response. IC Role / Device Role / Timing Role: Synchronous buck controller delivering low-noise, low-ripple 3.3V; soft-start prevents configuration glitches during power-up. Use Value: Fixed 3.3V output eliminates resistor selection error; integrated drivers reduce gate drive loop inductance for clean switching. |
| Industrial PLC Logic Rail | Networking ASIC Auxiliary Supply |
|
Use Scenario: Generating 3.3V logic supply for programmable logic controllers operating in –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade DC/DC controller with guaranteed spec compliance over full temp range and thermal shutdown. Use Value: –40°C to 85°C rating avoids derating; 130°C/W θJA enables use in compact enclosures with minimal airflow. |
Use Scenario: Supplying 3.3V auxiliary power to high-speed SerDes blocks in 10G Ethernet switches. IC Role / Device Role / Timing Role: High-efficiency synchronous controller minimizing heat near sensitive analog PHY sections. Use Value: >95% peak efficiency reduces localized heating; SOIC-8 package allows placement near ASIC with short power loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3832EDD#TRPBF | Pin-compatible 10-lead DFN; supports 0.6V–5V adjustable output; includes current limit, frequency sync, and shutdown. | Required where output voltage must be <3.3V (e.g., 1.2V CPU cores) or where fault protection beyond thermal shutdown is needed. | Select LTC3832EDD#TRPBF when lower output voltages, enhanced protection, or layout space savings (DFN vs SOIC) are priorities. |
| MP2315DJ-LF-Z | Monolithic 3A buck converter (not controller); integrates MOSFETs; fixed 3.3V output; no soft-start adjustability. | Suitable for space-constrained, lower-current (<3A) applications where external FETs are undesirable and soft-start timing is not critical. | Choose MP2315DJ-LF-Z only for cost-sensitive, low-power designs where integration outweighs flexibility and thermal scalability. |
Compared with LTC3830-1ES8#TRPBF, LTC3832EDD#TRPBF adds output adjustability and protection features at the cost of larger package and higher BOM complexity, while MP2315DJ-LF-Z trades external FET control and soft-start precision for monolithic simplicity and lower current capability.
Availability
LTC3830-1ES8#TRPBF is available at Aetrix Electronics and suitable for CPU power supplies, FPGA I/O banks, industrial PLC logic rails, and networking ASIC auxiliary supplies requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature operation.
Supply support for LTC3830-1ES8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and computing markets.
The LTC3830 family was designed specifically for high-efficiency, high-current synchronous buck conversion in low-voltage digital systems - emphasizing precision regulation, thermal robustness, and minimal external component count.
FAQ
What is the key functional difference between LTC3830-1ES8#TRPBF and the standard LTC3830ES8?
The LTC3830-1ES8#TRPBF replaces the SHDN (shutdown) pin with SS (soft-start), removing shutdown capability but adding controlled power-up sequencing. It also disables current limit, frequency adjustment, and external clock synchronization - making it a streamlined variant optimized for fixed-output, soft-start-critical applications where fault protection is handled externally.
Does LTC3830-1ES8#TRPBF support adjustable output voltage?
No. The LTC3830-1ES8#TRPBF has a fixed 3.3V output set by an internal resistor divider. To achieve adjustable output, use the 16-lead LTC3830EGN or LTC3830ES, which expose SENSE+ and SENSE− pins for external feedback networks - functionality omitted in the 8-lead -1 variant.
What is the purpose of the SS pin on LTC3830-1ES8#TRPBF, and how is it used?
The SS pin on LTC3830-1ES8#TRPBF sources a constant –12 µA (typ) current to charge an external capacitor to ground. The rising voltage on this capacitor controls the ramp rate of the COMP pin voltage, thereby regulating output voltage rise time and limiting inrush current - essential for preventing rail collapse during cold start of high-capacitance loads.
Can LTC3830-1ES8#TRPBF be used with an external current sense resistor?
No. The LTC3830-1ES8#TRPBF lacks SENSE+ and SENSE− pins and does not support external current sensing. Its current limit function is fully disabled per datasheet. For designs requiring programmable current limit, select the 16-lead LTC3830EGN or LTC3830ES, which implement RDS(ON)-based sensing and include IMAX/IFB pins.
What are the thermal limitations and protection mechanisms of LTC3830-1ES8#TRPBF?
The LTC3830-1ES8#TRPBF includes thermal shutdown that disables both G1 and G2 drivers if junction temperature reaches ~150°C. Operation resumes automatically once temperature falls below ~125°C. Its θJA is 130°C/W in SOIC-8, so thermal design must ensure adequate copper area and airflow to maintain TJ ≤ 125°C under maximum load and ambient conditions.
LTC3830-1ES8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 8V
- Frequency - Switching:
- 200kHz
- Duty Cycle (Max):
- 95%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Soft Start
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC3830-1ES8#TRPBF FAQ
1.How can I place an order for LTC3830-1ES8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3830-1ES8#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 LTC3830-1ES8#TRPBF reliable?
The price and inventory of LTC3830-1ES8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3830-1ES8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3830-1ES8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3830-1ES8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3830-1ES8#TRPBF?
LTC3830-1ES8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3830-1ES8#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 LTC3830-1ES8#TRPBF?
For technical support, including LTC3830-1ES8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3830-1ES8#TRPBF requirements.
6.How does Aetrix verify that LTC3830-1ES8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3830-1ES8#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 LTC3830-1ES8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3830-1ES8#TRPBF?
All LTC3830-1ES8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3830-1ES8#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 LTC3830-1ES8#TRPBF part is unused and in its original packaging.
Return procedure for LTC3830-1ES8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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