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Analog Devices Inc. LTC3830-1ES8#PBF
- Part No.:
- LTC3830-1ES8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC3830-1ES8#PBF.pdf
- Description:
- IC REG CTRLR BUCK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:207
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Product details
Overview
LTC3830-1ES8#PBF from Analog Devices (formerly Linear Technology) is a high-efficiency, synchronous step-down DC/DC controller optimized for 3V–8V input to 1.xV–3.xV output conversion in CPU and logic power supplies. It features voltage-mode control, 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#PBF datasheet, LTC3830-1ES8#PBF pinout, LTC3830-1ES8#PBF application, or LTC3830-1ES8#PBF 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 and interface differences.
Technical Context
The LTC3830-1ES8#PBF 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 (free-running) and supports no frequency adjustment or external synchronization - unlike the 16-lead LTC3830.
This variant replaces shutdown functionality with a dedicated soft-start pin (SS), sourcing –8 to –16 µA to charge an external capacitor. It omits current limit sensing (no IMAX/IFB pins), adjustable frequency (no FREQSET), and the internal resistor divider (SENSE+/SENSE– not used; FB only accepts external feedback).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 8V - enables direct operation from 3.3V or 5V rails without pre-regulation. |
| Output Voltage Accuracy | ±1% over line, load, and temperature - ensures stable core voltage under dynamic CPU load changes. |
| Max Duty Cycle | >91% over temperature - supports high-step-down ratios (e.g., 5V→1.8V) even at elevated junction temperatures. |
| Soft-Start Current | –8 to –16 µA sink/source - sets predictable ramp time via external CSS capacitor; prevents inrush current. |
| Quiescent Supply Current | <10 µA in shutdown-equivalent state - minimal standby drain when inactive (though no SHDN pin present). |
| Feedback Reference Voltage | 1.265 V (±0.01 V) - defines regulation point for external resistor divider; enables precise 1.2V–3.3V outputs. |
| Operating Temperature Range | –40°C to 85°C - qualified for industrial and embedded computing environments. |
Pinout & Package
Package: 8-lead plastic SO (SOIC-8), 150 mil width, JEDEC MS-012AC. Pin 3 internally connects PGND and GND - requires single-point ground tie near device for optimal regulation accuracy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G2 (Pin 1) | Bottom gate driver output | Drives gate of synchronous N-MOSFET Q2; swings from PGND to PVCC2; held low during soft-start initiation. |
| VCC/PVCC2 (Pin 2) | Combined logic & bottom-driver supply | Powers internal circuitry and G2 driver; requires 10 µF bypass to GND; tied internally to reduce component count. |
| COMP (Pin 3) | Error amplifier output / PWM comparator input | Interface for RC+C compensation network; directly controls duty cycle; clamped during soft-start. |
| SS (Pin 4) | Soft-start timing node | Sinks –8 to –16 µA to charge external capacitor; disables MIN/MAX comparators during startup; no shutdown function. |
| G1 (Pin 5) | Top gate driver output | Drives gate of high-side N-MOSFET Q1; swings from PGND to PVCC1; disabled when G2 is active (nonoverlap logic). |
| PVCC1 (Pin 6) | Top gate driver supply | Must be ≥ VIN + VGS(ON) of Q1; typically supplied by charge pump or auxiliary rail; enables >91% duty cycle. |
| GND (Pin 7) | Signal ground reference | Returns all low-power analog/digital circuits; must connect to PGND at single point near pin 3 to avoid ground bounce errors. |
| FB (Pin 8) | Feedback input | Accepts voltage-divided output signal; compares to 1.265V reference; SENSE+/SENSE– pins are unused and must be left floating. |
Key Features
| Feature | Design Value |
|---|---|
| No current sense resistor | Eliminates power loss and board space for high-current designs; relies on RDS(ON) of external high-side MOSFET (not implemented in LTC3830-1). |
| Dedicated soft-start (SS pin) | Enables controlled output voltage ramp-up using one external capacitor; prevents inrush into large output capacitance banks. |
| Voltage-mode PWM architecture | Provides stable loop response with standard Type II/III compensation; simplifies design vs. current-mode for multi-phase sync. |
| High-accuracy reference (1.265 V ±0.01 V) | Ensures tight output regulation across temperature and load - critical for FPGA and ASIC core supplies. |
| Integrated thermal shutdown | Disables both G1/G2 drivers at ~150°C junction; resumes operation after cooldown to ~125°C - protects MOSFETs and inductor. |
Applications
| Microprocessor Core Supply | FPGA I/O Bank Regulator |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series or Intel Atom processor cores requiring tightly regulated 1.0V–1.2V at up to 15A. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-current, low-voltage conversion with fast transient response. Use Value: ±1% output regulation maintains CPU stability during burst loads; >91% duty cycle supports 5V input to sub-1.2V outputs without dropout. |
Use Scenario: Generating configurable 1.8V/2.5V/3.3V supplies for FPGA I/O banks with independent voltage domains. IC Role / Device Role / Timing Role: Fixed-frequency voltage-mode controller delivering clean, low-noise output with minimal external components. Use Value: Soft-start prevents rail collapse during FPGA configuration; 3V–8V input range accommodates diverse system rail architectures. |
| Industrial PLC Logic Power | Network Switch ASIC Supply |
|
Use Scenario: Providing robust 3.3V logic rail in programmable logic controllers operating in –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade DC/DC controller with thermal protection and wide-input tolerance. Use Value: Guaranteed –40°C to 85°C operation ensures reliability in uncontrolled enclosures; <10µA quiescent current aids low-power sleep modes. |
Use Scenario: Delivering 1.2V core voltage to multi-gigabit Ethernet switch ASICs with high dynamic current demands. IC Role / Device Role / Timing Role: High-efficiency synchronous controller enabling >95% peak efficiency at full load. Use Value: High duty cycle (>91%) and precise reference minimize voltage droop during packet-burst transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3832EDHC#PBF | Supports 0.6V min output (vs. 1.xV for LTC3830-1); includes current limit, frequency adjust, and PFM mode; 16-pin DFN. | Required for sub-1V core supplies (e.g., advanced SoCs); adds complexity but enables higher light-load efficiency. | Select LTC3832EDHC#PBF when output voltage ≤1.0V or current limiting is mandatory; not pin-compatible. |
| MP2315DJ-LF-Z | Integrated MOSFETs (40V/3A); fixed 3.3V or adjustable output; no soft-start pin; 8-pin SOIC package. | Targeted at space-constrained, medium-power apps (<3A); lacks external high-side drive flexibility and precision reference. | Choose MP2315DJ-LF-Z for cost-sensitive, lower-current designs where integration outweighs regulation accuracy needs. |
Compared with LTC3830-1ES8#PBF, LTC3832EDHC#PBF extends output range downward and adds protection features at the cost of layout complexity, while MP2315DJ-LF-Z trades external FET control and ±1% regulation for monolithic simplicity and lower BOM count.
Availability
LTC3830-1ES8#PBF is available at Aetrix Electronics and suitable for CPU power supplies, FPGA I/O regulators, industrial PLC logic rails, and network switch ASIC supplies requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC3830-1ES8#PBF 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 ICs, serving aerospace, industrial, automotive, and communications markets.
The LTC3830 family was designed specifically for high-efficiency, low-voltage synchronous buck conversion in computing and digital logic systems - emphasizing precision regulation, thermal resilience, and minimal external component count.
FAQ
What is the primary function of the SS pin on the LTC3830-1ES8#PBF?
The SS (Soft-Start) pin on the LTC3830-1ES8#PBF sources a constant –8 to –16 µA current to charge an external capacitor, controlling the output voltage ramp rate during power-up. This prevents inrush current into large output capacitors and ensures orderly sequencing in multi-rail systems. Unlike the LTC3830, the LTC3830-1ES8#PBF replaces the SHDN pin with SS and does not support shutdown functionality.
Does the LTC3830-1ES8#PBF support adjustable switching frequency?
No, the LTC3830-1ES8#PBF does not support adjustable switching frequency. Its internal oscillator is fixed at approximately 200 kHz and lacks the FREQSET pin found on the 16-lead LTC3830. Frequency adjustment, external synchronization, and programmable PWM slope are absent - making it a simplified, cost-optimized variant for stable-frequency applications.
Can the LTC3830-1ES8#PBF be used with an external current sense resistor?
No, the LTC3830-1ES8#PBF cannot use an external current sense resistor because it omits the IMAX and IFB pins required for current limit functionality. The device is configured exclusively for voltage-mode control with FB-only feedback. Current sensing via RDS(ON) of the high-side MOSFET - present in the 16-lead LTC3830 - is also disabled in the LTC3830-1ES8#PBF.
What is the recommended input voltage range for reliable operation of the LTC3830-1ES8#PBF?
The LTC3830-1ES8#PBF is specified for continuous operation from 3V to 8V input. Operation below 3V may cause undervoltage lockout (typical VUVLO = 2.9V), while exceeding 8V risks absolute maximum rating violation on VCC/PVCC2 (14V max). For 3.3V input systems, ensure PVCC1 ≥ VIN + VGS(ON) of the high-side MOSFET to maintain >91% duty cycle capability.
How does the LTC3830-1ES8#PBF achieve ±1% output voltage regulation?
The LTC3830-1ES8#PBF achieves ±1% output voltage regulation through a precision 1.265V internal reference trimmed to ±0.01V, combined with a high-gain transconductance error amplifier (46–55 dB open-loop gain) and low-drift feedback path. Regulation holds across –40°C to 85°C, ±10% input variation, and 0–10A load steps - verified in production test and confirmed in Figure G02–G04 of the official datasheet.
LTC3830-1ES8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC3830-1ES8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3830-1ES8#PBF 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#PBF reliable?
The price and inventory of LTC3830-1ES8#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3830-1ES8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3830-1ES8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3830-1ES8#PBF?
LTC3830-1ES8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3830-1ES8#PBF 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#PBF?
For technical support, including LTC3830-1ES8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3830-1ES8#PBF requirements.
6.How does Aetrix verify that LTC3830-1ES8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3830-1ES8#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3830-1ES8#PBF?
All LTC3830-1ES8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3830-1ES8#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC3830-1ES8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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