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Analog Devices Inc. LTC3830ES#TRPBF
- Part No.:
- LTC3830ES#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC3830ES#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,418
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Product details
Overview
LTC3830ES#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 200kHz fixed-frequency PWM operation with 100kHz–500kHz programmability via FREQSET pin.
For engineers reviewing the LTC3830ES#TRPBF datasheet, LTC3830ES#TRPBF pinout, LTC3830ES#TRPBF application, or LTC3830ES#TRPBF equivalent, key selection considerations include its N-channel MOSFET gate drive architecture, internal current-sense via RDS(ON), soft-start implementation using SS pin, thermal shutdown at 150°C, and compatibility with low-voltage input rails down to 3V.
Technical Context
The LTC3830ES#TRPBF implements voltage-mode PWM control with a precision 1.265V internal reference and transconductance error amplifier (AV = 46–55dB, gm = 520–780µmho). Its feedback loop includes fast-acting MIN/MAX comparators (±40mV thresholds) that override the main loop during large load transients to maintain stability without compromising compensation.
It uses dual N-channel gate drivers (G1/G2) with nonoverlap timing (25–250ns), PVCC1/PVCC2 biasing for high-side driver swing, and integrated current-limit sensing via IFB/IMAX pins-eliminating external sense resistors by leveraging upper MOSFET RDS(ON). The 16-lead SO package supports full feature set including soft-start, frequency adjustment, and shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 8V - enables direct use from 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. |
| Max Duty Cycle | >91% over temperature - supports high-step-down ratios (e.g., 3.3V→1.8V) even at elevated junction temperatures. |
| Oscillator Frequency | 100kHz–500kHz programmable - allows optimization of efficiency vs. size (inductor/capacitor) and EMI compliance. |
| Shutdown Current | <10µA - minimizes standby power loss in battery-backed or always-on systems. |
| Thermal Protection | 150°C trip, 125°C recovery - prevents permanent damage during overload or poor heatsinking. |
| Gate Driver Rise/Fall Time | 80–250ns at 5V PVCC - supports fast-switching MOSFETs while limiting dV/dt-induced noise. |
Pinout & Package
Package: 16-lead plastic SO (SO-16), RoHS-compliant, θJA = 100°C/W. Pin 1 marked with dot; exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G1 | Top Gate Driver Output | Drives gate of upper N-MOSFET (Q1); swings from PGND to PVCC1; disabled during shutdown or G2 high. |
| PVCC1 | Power Supply for G1 | Must be ≥ VIN + VGS(ON)(Q1); enables high-side drive; requires ≥2.5V above VCC for full 95% duty cycle. |
| 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 to avoid ground-loop regulation errors. |
| SENSE+, FB, SENSE− | Feedback Input Network | Internal 18k/11.2k divider sets 3.3V output when SENSE+ and SENSE− connected to output capacitor terminals. |
| SHDN | Shutdown / External Sync Input | TTL-compatible input; low >100µs enables shutdown; negative edge synchronizes oscillator to external clock (100–500kHz). |
| SS | Soft-Start Control | Connect external capacitor to GND; internal 12µA current source ramps SS voltage to control startup slew rate and prevent inrush. |
| COMP | Error Amplifier Output | Connect RC+C network here to stabilize feedback loop; dominant pole placement determines phase margin and transient response. |
| FREQSET | Oscillator Frequency Adjustment | Current sink/source adjusts frequency: ±10kHz per µA; floating = ~200kHz; 0–500kHz range supported. |
| IMAX | Current Limit Threshold Set | 12µA internal sink; connect external resistor to VIN at Q1 drain to set peak current limit based on Q1 RDS(ON). |
| IFB | Current Sense Input | Kelvin-connected to Q1 source via 1kΩ resistor; measures VDS across Q1 to derive load current without sense resistor. |
| VCC | Logic Supply Input | Clean 3–8V supply for internal circuitry; bypass with 4.7µF ceramic capacitor to GND. |
| PVCC2 | Power Supply for G2 | Connect to main high-power rail (e.g., VIN); drives lower N-MOSFET (Q2) gate from PGND to PVCC2. |
| G2 | Bottom Gate Driver Output | Drives gate of lower N-MOSFET (Q2); 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 RDS(ON) of upper N-MOSFET for current limiting - reduces BOM count, PCB area, and power loss in high-current paths. |
| Programmable switching frequency | 100kHz–500kHz via FREQSET pin - enables EMI spread-spectrum tuning and optimal trade-off between efficiency and magnetics size. |
| Dual comparator fast transient response | MIN/MAX comparators with ±40mV thresholds and 2–3µs delay - clamp duty cycle during sudden load steps without destabilizing main loop. |
| Integrated soft-start | Single external capacitor on SS pin controls ramp time - prevents output overshoot and inrush current into bulk capacitance. |
| Thermal shutdown with hysteresis | 150°C trip / 125°C recovery - protects IC and external FETs during sustained overload or inadequate cooling. |
| External clock synchronization | SHDN pin doubles as sync input - enables multi-phase or noise-sensitive systems to lock switching to master clock (100–500kHz). |
Applications
| CPU Core Power Supply | Multi-Rail Logic Supply Generator |
|---|---|
|
Use Scenario: Providing tightly regulated 1.8V/2.5V/3.3V to microprocessors or FPGAs with rapid load transients up to 10A. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-side/low-side N-MOSFET switching, current sensing, and loop compensation. Use Value: ±1% output regulation and fast MIN/MAX comparator response ensure voltage stays within core spec limits during 0→10A load steps. |
Use Scenario: Generating multiple independent logic supply rails (e.g., 1.8V I/O, 2.5V memory, 3.3V interface) from a common 5V bus. IC Role / Device Role / Timing Role: Configurable step-down controller supporting fixed 3.3V output or adjustable outputs via external resistor divider on FB pin. Use Value: Internal 3.3V reference and flexible feedback options reduce component count versus discrete regulator solutions. |
| High-Efficiency Point-of-Load Converter | Industrial Distributed Power System |
|
Use Scenario: Converting 3.3V or 5V intermediate bus to 1.2V–3.3V loads in space-constrained telecom or networking equipment. IC Role / Device Role / Timing Role: High-efficiency synchronous controller driving low-RDS(ON) MOSFETs with >95% peak efficiency and minimal heat generation. Use Value: >91% max duty cycle and low quiescent current (<10µA shutdown) extend operational headroom and reduce thermal management burden. |
Use Scenario: Powering remote sensors, PLC modules, or fieldbus interfaces requiring robust operation across –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade DC/DC controller with guaranteed –40°C to 85°C operation, thermal protection, and stable regulation under wide input/output variations. Use Value: Undervoltage lockout (2.4–2.9V) and 125°C max junction temperature rating ensure reliable start-up and continuous operation in harsh environments. |
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 LTC3830ES#TRPBF); includes built-in bootstrap diode; same 16-pin SSOP package. | Required for sub-1.8V core supplies (e.g., advanced ASICs); eliminates need for external bootstrap capacitor/diode. | Select LTC3832EGN#PBF when output voltage ≤1.5V is required or when simplifying high-side gate drive design is critical. |
| MP2315DJ-LF-Z | Integrated 30V/6A MOSFETs; fixed 500kHz frequency; no FREQSET or external sync; smaller 8-pin SOIC package. | Suitable for medium-power (≤5A), cost-sensitive designs where board space and BOM count outweigh programmability needs. | Choose MP2315DJ-LF-Z for compact, self-contained 3.3V→1.2V converters up to 5A where external MOSFET flexibility is unnecessary. |
Compared with LTC3832EGN#PBF and MP2315DJ-LF-Z, the LTC3830ES#TRPBF offers superior programmability (frequency, current limit, soft-start), higher current capability via discrete MOSFET selection, and tighter output regulation - making it preferred for high-performance, thermally demanding, or multi-rail industrial applications.
Availability
LTC3830ES#TRPBF is available at Aetrix Electronics and suitable for CPU power supplies, multi-rail logic generators, and high-efficiency point-of-load converters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3830ES#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and computing markets.
The LTC3830ES#TRPBF belongs to Linear's high-efficiency synchronous controller product line, designed specifically for low-voltage, high-current step-down conversion in computing and infrastructure applications where precision regulation and thermal resilience are critical.
FAQ
What is the minimum input voltage supported by the LTC3830ES#TRPBF?
The LTC3830ES#TRPBF supports a minimum input voltage of 3V, enabling direct operation from standard 3.3V system rails without pre-regulation. This low UVLO threshold (2.4–2.9V) ensures reliable start-up even under brownout conditions, and the >91% maximum duty cycle maintains regulation down to 1.8V output at full load.
Does the LTC3830ES#TRPBF require an external current sense resistor?
No, the LTC3830ES#TRPBF eliminates the need for an external current sense resistor by measuring voltage drop across the RDS(ON) of the upper N-channel MOSFET via the IFB and IMAX pins. This approach reduces power loss, PCB area, and BOM cost while maintaining accurate overcurrent protection during fault conditions.
How is soft-start implemented on the LTC3830ES#TRPBF?
The LTC3830ES#TRPBF implements soft-start using an internal 12µA current source charging an external capacitor connected from the SS pin to GND. As the SS voltage ramps, it clamps the COMP pin to control duty cycle rise, preventing output overshoot and inrush current. The soft-start time is determined by CSS value and is fully user-adjustable.
Can the LTC3830ES#TRPBF synchronize to an external clock?
Yes, the LTC3830ES#TRPBF can synchronize to an external clock signal applied to the SHDN pin. A negative edge triggers synchronization mode, locking the internal oscillator to frequencies from 100kHz to 500kHz. This feature is essential for reducing beat frequencies and EMI in multi-converter systems or noise-sensitive applications.
What package type is used for the LTC3830ES#TRPBF?
The LTC3830ES#TRPBF is supplied in a 16-lead plastic SO (SO-16) package with θJA = 100°C/W. This package supports all features including soft-start, frequency adjustment, shutdown, and full current-sense functionality - distinguishing it from the 8-lead SO variant which omits these capabilities.
LTC3830ES#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-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:
- 16-SO
LTC3830ES#TRPBF FAQ
1.How can I place an order for LTC3830ES#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3830ES#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 LTC3830ES#TRPBF reliable?
The price and inventory of LTC3830ES#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3830ES#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3830ES#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3830ES#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3830ES#TRPBF?
LTC3830ES#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3830ES#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 LTC3830ES#TRPBF?
For technical support, including LTC3830ES#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3830ES#TRPBF requirements.
6.How does Aetrix verify that LTC3830ES#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3830ES#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 LTC3830ES#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3830ES#TRPBF?
All LTC3830ES#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3830ES#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 LTC3830ES#TRPBF part is unused and in its original packaging.
Return procedure for LTC3830ES#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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