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Analog Devices Inc. LTC3830EGN#PBF
- Part No.:
- LTC3830EGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3830EGN#PBF.pdf
- Description:
- IC REG CTRLR BUCK 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:105
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Product details
Overview
LTC3830EGN#PBF 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, 200kHz fixed-frequency PWM operation (adjustable 100–500kHz), and internal soft-start - all in a 16-lead SSOP package.
For engineers reviewing the LTC3830EGN#PBF datasheet, LTC3830EGN#PBF pinout, LTC3830EGN#PBF application, or LTC3830EGN#PBF equivalent, this page delivers verified technical context, validated pin functions, confirmed design values for soft-start, current limit, oscillator tuning, and real-world alternatives with documented functional differences - all specific to the LTC3830EGN#PBF variant.
Technical Context
The LTC3830EGN#PBF implements voltage-mode control with a precision 1.265V internal reference and transconductance error amplifier (AV = 46–55dB, gm = 520–780µmho). Its PWM comparator compares COMP voltage against a ramp generated by a current-controlled oscillator whose frequency is set via FREQSET pin current (10kHz/µA).
It integrates dual N-channel gate drivers (G1/G2) with nonoverlap timing (25–250ns), supports Kelvin-sensed current limiting via IFB/IMAX pins using upper MOSFET RDS(ON), and includes MIN/MAX comparators (±40mV thresholds) for fast transient response - all while maintaining <10µA shutdown current and thermal shutdown at 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 8V - enables direct use with 3.3V or 5V system rails without pre-regulation. |
| Output Voltage Accuracy | ±1% over line, load, and temperature - ensures stable core/logic supply under dynamic conditions. |
| Oscillator Frequency | 100kHz to 500kHz adjustable via FREQSET - allows optimization of efficiency vs. size for inductor/capacitor selection. |
| Max Duty Cycle | >91% over temperature - supports low-dropout operation (e.g., 3.3V→2.5V) even at elevated junction temperatures. |
| Soft-Start Current | –8 to –16µA sink from SS pin - sets predictable startup ramp rate with external capacitor CSS. |
| Current Limit Tempco | +3300ppm/°C on IMAX sink current - compensates for MOSFET RDS(ON) drift, stabilizing trip point across temperature. |
| Shutdown Current | <10µA - meets ultra-low quiescent power requirements for standby and battery-backed systems. |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 5.1mm × 6.2mm, 0.635mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G1 | Top gate driver output | Drives upper N-MOSFET gate from PGND to PVCC1; disabled during shutdown or when G2 is active. |
| PVCC1 | Power supply for G1 driver | Must be ≥ VCC + 2.5V to enable 95% duty cycle and activate current limit protection. |
| PGND | Power ground return | Low-impedance return path for both gate drivers; must connect near Q2 source to minimize noise coupling. |
| GND | Signal ground reference | Reference for internal analog circuitry; tie directly to PGND at device pin to avoid ground loop errors. |
| SENSE– / FB / SENSE+ | Feedback network interface | Supports either internal 3.3V divider (SENSE+/– tied to output caps, FB floating) or external resistor divider (FB only). |
| SS | Soft-start control | Internal 12µA current source charges external capacitor; COMP clamped during ramp-up for controlled start. |
| COMP | Error amplifier output | Connect RC+C compensation network here to stabilize feedback loop for target phase margin and transient response. |
| FREQSET | Oscillator frequency programming | 10kHz/µA adjustment range; floating = ~200kHz; sinking 25µA → ~450kHz; sourcing 10µA → ~100kHz. |
| IMAX | Current limit threshold set | 12µA internal sink; connect RIMAX from VIN (Q1 drain) to set ILIM = (ILOAD + IRIPPLE/2) × RDS(ON)/12µA. |
| IFB | Current sense input | Kelvin-connected to Q1 source via 1kΩ resistor; samples RDS(ON) voltage drop to enable resistorless current limiting. |
| VCC | Logic supply input | 4.7µF bypass required; powers internal bias circuits; separate from high-power PVCC1/PVCC2 rails. |
| PVCC2 | Power supply for G2 driver | Connected to main high-current input rail; drives lower N-MOSFET gate from PGND to PVCC2. |
| G2 | Bottom gate driver output | Drives lower N-MOSFET gate; held low until G1 first turns on to prevent shoot-through during soft-start. |
Key Features
| Feature | Design Value |
|---|---|
| No external current sense resistor | Uses upper MOSFET RDS(ON) for current sensing - eliminates power loss, board space, and cost of discrete shunt. |
| Programmable oscillator (100–500kHz) | Enables trade-off between EMI performance (lower fSW) and component size (higher fSW) without changing layout. |
| Integrated soft-start with external capacitor | Prevents inrush current and output overshoot; CSS value directly determines startup time (tSS ≈ VSS × CSS/12µA). |
| MIN/MAX fast transient comparators | ±40mV thresholds with 2–3µs delay - corrects large load steps before main error amplifier responds, improving stability. |
| Thermal shutdown (150°C) | Disables both gate drivers until junction cools to 125°C - protects IC and external FETs during sustained overload. |
Applications
| CPU Core Power Supply | Multi-Rail Logic Supply Generator |
|---|---|
|
Use Scenario: Providing tightly regulated 1.8V/2.5V/3.3V to microprocessors with dynamic load currents up to 20A. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-side/low-side N-MOSFET switching with voltage-mode PWM. Use Value: ±1% output regulation and >91% duty cycle ensure stable core voltage during deep sleep-to-burst transitions without dropout. |
Use Scenario: Generating multiple independent logic supply rails (e.g., 3.3V, 2.5V, 1.8V) from a common 5V bus in FPGA or ASIC systems. IC Role / Device Role / Timing Role: Configurable step-down controller supporting fixed or adjustable outputs via external resistor dividers. Use Value: Internal 3.3V reference and flexible feedback options reduce BOM count and simplify multi-rail design validation. |
| Distributed Point-of-Load Converter | High-Efficiency Telecom Power Module |
|
Use Scenario: Local DC/DC conversion on dense PCBs where input is 3.3V or 5V and output must be ≤3.3V with minimal footprint. IC Role / Device Role / Timing Role: Compact SSOP-based controller enabling high-density PoL designs with integrated gate drivers and soft-start. Use Value: 16-lead SSOP package and resistorless current sensing allow compact, thermally efficient layouts with <10µA shutdown current. |
Use Scenario: Mid-range telecom power modules requiring >95% efficiency, synchronization to system clock, and robust fault protection. IC Role / Device Role / Timing Role: Synchronized buck controller with SHDN-as-sync-input capability and thermal/overcurrent safeguards. Use Value: External clock sync (100–500kHz) eliminates beat frequencies; thermal shutdown and MIN/MAX comparators enhance field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3832EGN#PBF | Supports 0.6V minimum output (vs. 1.8V min for LTC3830EGN#PBF); includes PGOOD, higher IMAX accuracy (±15% vs. ±65%), same SSOP-16 package. | Required for sub-1.8V core supplies (e.g., advanced SoCs); better suited for precision current limiting in high-reliability systems. | Select LTC3832EGN#PBF when output voltage <1.8V is needed or tighter current limit tolerance is critical. |
| LTC3850EGN#PBF | Includes integrated 5V LDO for gate drive, current-mode control (vs. voltage-mode), programmable current limit, and enhanced light-load efficiency modes. | Better for wide-input (4.5–38V) applications and designs requiring adaptive burst mode or improved light-load regulation. | Choose LTC3850EGN#PBF for wider VIN range, current-mode stability advantages, or integrated gate-drive LDO simplification. |
Compared with LTC3830EGN#PBF, LTC3832EGN#PBF extends low-voltage capability and improves current limit accuracy, while LTC3850EGN#PBF shifts to current-mode architecture with broader input support and integrated bias - making each suitable for distinct power architecture priorities rather than drop-in replacement.
Availability
LTC3830EGN#PBF is available at Aetrix Electronics and suitable for CPU power supplies, multi-rail logic generators, and distributed point-of-load converters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3830EGN#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 (including former Linear Technology portfolio) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving aerospace, industrial, automotive, and communications markets.
The LTC3830EGN#PBF belongs to Linear's high-efficiency synchronous buck controller product line, designed specifically for low-voltage, high-current DC/DC conversion in computing and infrastructure applications where precision regulation and thermal resilience are critical.
FAQ
What is the minimum output voltage supported by the LTC3830EGN#PBF?
The LTC3830EGN#PBF supports a minimum output voltage of 1.8V when using its internal feedback divider. With an external resistor divider, the output can be set as low as approximately 1.265V - the internal reference voltage - though practical designs typically maintain ≥1.5V for stability and margin. The LTC3830EGN#PBF does not support sub-1.265V outputs.
Does the LTC3830EGN#PBF require an external current sense resistor?
No, the LTC3830EGN#PBF eliminates the need for an external current sense resistor by measuring voltage drop across the upper N-channel MOSFET's RDS(ON) via the IFB and IMAX pins. This resistorless current sensing reduces power loss, PCB area, and BOM cost - though it introduces ±65% current limit tolerance due to RDS(ON) variation.
How is the oscillator frequency adjusted on the LTC3830EGN#PBF?
The LTC3830EGN#PBF oscillator frequency is adjusted via current into or out of the FREQSET pin: sinking 1µA lowers frequency by ~10kHz, sourcing 1µA raises it by ~10kHz. With FREQSET floating, frequency is ~200kHz; connecting a 50kΩ resistor to ground sinks ~25µA, yielding ~450kHz. The range is 100–500kHz.
What is the purpose of the MIN and MAX comparators in the LTC3830EGN#PBF?
The MIN and MAX comparators in the LTC3830EGN#PBF provide fast transient correction: MIN forces >91% duty cycle if FB drops 40mV below 1.265V reference; MAX forces 0% duty cycle if FB rises 40mV above. Their 2–3µs delayed response prevents noise triggering while enabling rapid recovery from large load steps before the main error amplifier reacts.
Can the LTC3830EGN#PBF synchronize to an external clock?
Yes, the LTC3830EGN#PBF can synchronize to an external clock using the SHDN pin as a sync input. A negative edge on SHDN resets the internal oscillator and locks it to the external frequency within 100–500kHz. Note: This function is disabled in the LTC3830-1 variant, but fully supported in the LTC3830EGN#PBF.
LTC3830EGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (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:
- 16-SSOP
LTC3830EGN#PBF FAQ
1.How can I place an order for LTC3830EGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3830EGN#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 LTC3830EGN#PBF reliable?
The price and inventory of LTC3830EGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3830EGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC3830EGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3830EGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3830EGN#PBF?
LTC3830EGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3830EGN#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 LTC3830EGN#PBF?
For technical support, including LTC3830EGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3830EGN#PBF requirements.
6.How does Aetrix verify that LTC3830EGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3830EGN#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 LTC3830EGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC3830EGN#PBF?
All LTC3830EGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3830EGN#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 LTC3830EGN#PBF part is unused and in its original packaging.
Return procedure for LTC3830EGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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