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Analog Devices Inc. LTC3830ES8#TRPBF
- Part No.:
- LTC3830ES8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC3830ES8#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,634
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Product details
Overview
LTC3830ES8#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, synchronous step-down DC/DC controller optimized for 3.3V–5V input to 1.8V–3.3V output conversion in CPU and logic power supplies. It features no external current sense resistor, ±1% output regulation over line/load/temperature, >91% max duty cycle, and operates from 3V to 8V input. Designed for low-voltage, high-current applications such as embedded processors and distributed power rails.
For engineers reviewing the LTC3830ES8#TRPBF datasheet, LTC3830ES8#TRPBF pinout, LTC3830ES8#TRPBF application, or LTC3830ES8#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping (8-lead SO), real-world efficiency data (>95%), and two rigorously cross-checked alternative controllers with documented functional differences.
Technical Context
The LTC3830ES8#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 runs at 200 kHz (adjustable 100–500 kHz in 16-pin variants, but fixed in this 8-lead version), and it drives all-N-channel MOSFETs using dual gate drivers (G1/G2) with 80–250 ns rise/fall times and 25–250 ns nonoverlap timing.
This S8-package variant lacks current limit sensing (no IMAX/IFB pins), soft-start (no SS pin), frequency adjustment (no FREQSET), and shutdown control (SHDN repurposed as sync input only). It retains fixed 3.3V output via internal resistor divider (SENSE+/SENSE−/FB configuration), ±1% regulation, and thermal shutdown at 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 8V - supports direct operation from 3.3V or 5V system rails without pre-regulation. |
| Output Voltage | Fixed 3.3V ±1% - set by internal 18k/11.2k resistor divider; eliminates external feedback resistors. |
| Max Duty Cycle | >91% over temperature - enables high-step-down ratios (e.g., 5V→3.3V) even under thermal stress. |
| Efficiency | >95% achievable - enabled by synchronous N-MOSFET drive and no sense-resistor losses. |
| Operating Temp | –40°C to 85°C - qualified for industrial and embedded computing environments. |
| Quiescent Current | <10 µA in shutdown - minimal standby power draw when disabled via SHDN pin. |
| Package | 8-lead SO (S8) - surface-mount, 130°C/W θJA, RoHS-compliant plastic body. |
Pinout & Package
8-lead Plastic SO (S8) package with exposed pad not electrically connected. Pin 1 marked by dot; pin 1 is G2. Thermal resistance θJA = 130°C/W. Mounting requires standard reflow profile per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G2 (Pin 1) | Bottom gate driver output | Drives gate of lower N-MOSFET (Q2); swings from PGND to PVCC2; held low during startup until G1 activates. |
| VCC/PVCC2 (Pin 2) | Combined logic & bottom-driver supply | Powers internal circuitry and G2 driver; requires 4.7µF bypass capacitor; tied internally to PVCC2 in S8 variant. |
| COMP (Pin 3) | Error amplifier output / PWM comparator input | Interface for loop compensation network (RC + C); sets transient response and stability margin. |
| SHDN (Pin 4) | Shutdown / external clock sync input | TTL-compatible input: low ≥100µs enables shutdown; negative edge synchronizes oscillator (100–500kHz range). |
| G1 (Pin 5) | Top gate driver output | Drives gate of upper N-MOSFET (Q1); swings from PGND to PVCC1; disabled during shutdown or when G2 is high. |
| PVCC1 (Pin 6) | Top gate driver supply | Must be ≥VIN + VGS(ON) of Q1; typically supplied via charge pump or auxiliary rail; enables >91% duty cycle. |
| GND (Pin 7) | Signal ground | Reference for low-power internal circuits; must connect to PGND at device pin to avoid regulation error. |
| FB (Pin 8) | Feedback input | Connected to output via internal 3.3V divider; left floating for fixed-output mode; used with external resistors for adjustable outputs. |
Key Features
| Feature | Design Value |
|---|---|
| No current sense resistor | Eliminates power loss and board space for high-current designs; uses RDS(ON) of top MOSFET for current monitoring (not implemented in S8 variant). |
| Fixed 3.3V output | Internal 18k/11.2k resistor divider reduces BOM count and improves accuracy vs. external resistor tolerances. |
| Synchronous N-MOSFET drive | Dual gate drivers (G1/G2) support high-efficiency buck topology with discrete external FETs; no external bootstrap diodes required. |
| Thermal shutdown | Automatic disable of both gate drivers at 150°C junction temperature; resumes operation after cooling to 125°C. |
| External clock synchronization | SHDN pin accepts external clock edges (100–500kHz) to eliminate beat frequencies in multi-rail systems. |
Applications
| CPU Core Power Supply | Multi-Rail Logic Supply Generator |
|---|---|
|
Use Scenario: Providing stable 3.3V rail to microcontrollers or FPGAs in industrial control units with 5V input bus. IC Role / Device Role / Timing Role: Primary step-down controller managing high-current buck conversion; regulates output under dynamic load steps up to 10A. Use Value: Delivers ±1% regulation across –40°C to 85°C and >95% peak efficiency, reducing thermal design burden and enabling compact PCB layout. |
Use Scenario: Generating multiple low-voltage rails (e.g., 3.3V, 2.5V, 1.8V) from a common 5V backplane in telecom line cards. IC Role / Device Role / Timing Role: One of several synchronized controllers sharing a master clock signal via SHDN pin to suppress EMI. Use Value: External clock sync capability ensures deterministic switching alignment across rails, lowering conducted emissions by >10dB. |
| Distributed Point-of-Load Converter | High-Efficiency Industrial DC-DC Module |
|
Use Scenario: Local 3.3V regulation near ASICs on dense server motherboard with tight thermal constraints. IC Role / Device Role / Timing Role: Voltage-mode controller driving discrete Si7806DN MOSFETs; leverages >91% max duty cycle for minimal dropout headroom. Use Value: Enables 5V-to-3.3V conversion with <200mV input headroom, preserving system margin during brownout conditions. |
Use Scenario: Embedded power module for programmable logic controllers requiring long-term reliability and wide temperature operation. IC Role / Device Role / Timing Role: Main control IC in sealed, convection-cooled enclosure; relies on thermal shutdown and robust SO-8 package. Use Value: 130°C/W θJA and –40°C to 85°C rating ensure stable operation without forced airflow, reducing system fan count and noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3832ES8#TRPBF | Supports 0.6V–5V adjustable output; includes current limit and soft-start; same S8 package and pinout. | Required where output voltage must be <3.3V (e.g., DDR memory rails) or precise current limiting is needed. | Select LTC3832ES8#TRPBF if adjustable VOUT or integrated current limit is mandatory; otherwise LTC3830ES8#TRPBF offers simpler fixed-3.3V solution. |
| MP2315DJ-LF-Z | Monolithic 3A buck converter (integrated FETs); fixed 3.3V output; 4.5–28V input; no external sync or high-duty-cycle optimization. | Suitable for space-constrained, medium-current (<3A) applications where integration outweighs efficiency and thermal performance. | Choose MP2315DJ-LF-Z for cost-sensitive, low-complexity designs below 3A; LTC3830ES8#TRPBF remains preferred for >5A, high-efficiency, or thermally demanding use cases. |
Compared with LTC3832ES8#TRPBF and MP2315DJ-LF-Z, the LTC3830ES8#TRPBF provides superior thermal handling (130°C/W vs. ~180°C/W), higher current scalability (no FET current limits), and tighter output regulation (±1% vs. ±2%), making it optimal for high-reliability, high-power industrial point-of-load designs.
Availability
LTC3830ES8#TRPBF is available at Aetrix Electronics and suitable for CPU core power supplies, multi-rail logic supply generators, and distributed point-of-load converters requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.
Supply support for LTC3830ES8#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 belongs to Linear's high-efficiency synchronous buck controller product line, engineered specifically for low-voltage, high-current DC/DC conversion in processor and FPGA power delivery systems where precision regulation and thermal resilience are critical.
FAQ
What is the output voltage configuration of the LTC3830ES8#TRPBF?
The LTC3830ES8#TRPBF is factory-configured for fixed 3.3V output using an internal 18k/11.2k resistor divider. The FB pin connects directly to the output capacitor through this network; SENSE+ and SENSE− are unused in this mode. No external resistors are required, and output accuracy is guaranteed at ±1% over line, load, and temperature.
Does the LTC3830ES8#TRPBF support current limit protection?
No, the LTC3830ES8#TRPBF does not implement current limit protection. That function requires IMAX and IFB pins, which are absent in the 8-lead S8 package. Current limiting is only available in the 16-lead LTC3830EGN and LTC3830ES variants. For overload protection, designers must rely on external circuitry or thermal shutdown.
Can the LTC3830ES8#TRPBF be synchronized to an external clock?
Yes, the LTC3830ES8#TRPBF supports external clock synchronization via the SHDN pin. A negative edge on SHDN forces the internal oscillator to lock to an external clock signal in the 100kHz–500kHz range. This feature eliminates beat frequencies in multi-controller systems and reduces EMI in noise-sensitive applications.
What is the maximum duty cycle of the LTC3830ES8#TRPBF and why does it matter?
The LTC3830ES8#TRPBF supports a maximum duty cycle exceeding 91% over temperature. This enables efficient operation in high-step-down scenarios (e.g., 5V input to 3.3V output) with minimal input-to-output voltage differential, preserving regulation during low-headroom conditions like battery droop or upstream regulator tolerance stack-up.
Is the LTC3830ES8#TRPBF pin-compatible with other members of the LTC3830 family?
No, the LTC3830ES8#TRPBF is not pin-compatible with 16-lead versions (e.g., LTC3830EGN). It has only 8 pins and omits IMAX, IFB, FREQSET, SS, SENSE+, and SENSE−. The SHDN pin serves dual purpose (shutdown/sync), and PVCC1/VCC/PVCC2 are consolidated differently. Board redesign is required when migrating between package variants.
LTC3830ES8#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
LTC3830ES8#TRPBF FAQ
1.How can I place an order for LTC3830ES8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3830ES8#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 LTC3830ES8#TRPBF reliable?
The price and inventory of LTC3830ES8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3830ES8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3830ES8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3830ES8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3830ES8#TRPBF?
LTC3830ES8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3830ES8#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 LTC3830ES8#TRPBF?
For technical support, including LTC3830ES8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3830ES8#TRPBF requirements.
6.How does Aetrix verify that LTC3830ES8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3830ES8#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 LTC3830ES8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3830ES8#TRPBF?
All LTC3830ES8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3830ES8#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 LTC3830ES8#TRPBF part is unused and in its original packaging.
Return procedure for LTC3830ES8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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