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Analog Devices Inc. LTC1430IS#TRPBF
- Part No.:
- LTC1430IS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1430IS#TRPBF.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
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Product details
Overview
LTC1430IS#TRPBF from Analog Devices (formerly Linear Technology) is a high-power synchronous step-down switching regulator controller optimized for 5V-to-3.3V conversion in high-current applications. It features dual N-channel MOSFET gate drivers, ±1% output regulation over line/load/temperature, 200kHz fixed-frequency PWM operation, and current sensing via upper FET RDS(ON)-eliminating external sense resistors. It is used in Pentium® microprocessor power supplies and dual-voltage logic board local regulation.
For engineers reviewing the LTC1430IS#TRPBF datasheet, LTC1430IS#TRPBF pinout, LTC1430IS#TRPBF application, or LTC1430IS#TRPBF equivalent, key selection considerations include its 16-lead SOIC package, –40°C to +85°C industrial temperature grade, internal soft-start, adjustable oscillator (100–500kHz), and current-limit functionality enabled only in 16-lead variants.
Technical Context
The LTC1430IS#TRPBF implements a voltage-mode PWM control architecture with a precision 1.265V internal reference and transconductance error amplifier (300–1200 µmho). Its feedback loop includes MIN/MAX comparators that enforce ±3% fast-response output clamping independent of the main FB loop.
It integrates two independent high-side/low-side gate drivers (G1/G2) with non-overlap timing (25–250 ns), supports up to 10,000 pF gate capacitance, and uses PVCC1/PVCC2 separate supply rails for optimal driver swing-enabling efficient enhancement of standard or logic-level N-channel MOSFETs via charge-pump or auxiliary supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 130–300 kHz (industrial grade); externally adjustable from 100 kHz to >500 kHz via FREQSET resistor. |
| Output Regulation Accuracy | ±1% over line, load, and temperature-achieved via trimmed 1.265V reference and low-drift feedback path. |
| Quiescent Current | 350 µA typical; drops to 1 µA in shutdown-enabling >90% efficiency at light loads (1–50 A range). |
| Current Limit Sensing | Uses RDS(ON) of upper N-FET (via IFB pin); no external sense resistor required-reducing BOM count and PCB losses. |
| Driver Output Capability | G1/G2 drive up to 10,000 pF gate capacitance with 80–250 ns rise/fall times-supporting high-speed, high-current MOSFETs. |
| Operating Temperature | –40°C to +85°C (industrial grade)-validated for embedded computing and industrial power systems. |
| Max Duty Cycle | 90–96% (depending on VFB)-enabling high step-down ratios (e.g., 5V→3.3V) with minimal dropout margin. |
Pinout & Package
Package: 16-lead plastic SOIC (S package), RoHS-compliant, moisture-sensitive level 3. Thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G1 (Pin 1) | Upper N-FET gate driver output | Swings from PGND to PVCC1; drives M1 gate; synchronized low when G2 is high. |
| PVCC1 (Pin 2) | Power supply for G1 driver | Must exceed PVCC by ≥VGS(ON) of M1; supports charge-pump or auxiliary 12V supply. |
| PGND (Pin 3) | Power ground return | Low-impedance return for both drivers; must be connected near M2 source to minimize noise. |
| GND (Pin 4) | Signal ground reference | Return for internal analog circuitry; tied to PGND at device pin for minimal ground shift error. |
| SENSE– (Pin 5) | Negative feedback sense | Connected to output capacitor negative terminal for 3.3V internal-divider regulation. |
| FB (Pin 6) | Feedback input node | Internal transconductance amplifier input; floats when using internal 3.3V divider. |
| SENSE+ (Pin 7) | Positive feedback sense | Connected to output capacitor positive terminal; completes Kelvin-sense path for accuracy. |
| SHDN (Pin 8) | Shutdown control input | TTL-compatible; <0.8V for >50 µs forces shutdown (IQ ≤ 1 µA); >2.4V enables operation. |
| SS (Pin 9) | Soft-start capacitor connection | External capacitor sets startup ramp time and stabilizes current-limit loop entry/exit. |
| COMP (Pin 10) | Error amplifier output / PWM input | Connect RC network here to compensate feedback loop for stable transient response. |
| FREQSET (Pin 11) | Oscillator frequency adjustment | Resistor to GND speeds up fOSC; resistor to VCC slows it down-enabling custom ripple/noise trade-offs. |
| IMAX (Pin 12) | Current limit threshold set | 12 µA internal pull-down; external resistor or voltage adjusts trip point for RDS(ON)-based limiting. |
| IFB (Pin 13) | Current sense input | Monitors M1 source-drain voltage during G1-on phase; withstands up to 18V transient. |
| VCC (Pin 14) | Analog core supply | Clean 4.7 µF bypass required; powers internal reference, amplifiers, and logic-separate from PVCC. |
| PVCC2 (Pin 15) | Power supply for G2 driver | Typically tied to PVCC; drives M2 gate; supports direct or charge-pumped sourcing. |
| G2 (Pin 16) | Lower N-FET gate driver output | Swings from GND to PVCC2; low when G1 is high-ensuring shoot-through prevention. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous N-FET architecture | Eliminates P-FET and external sense resistor-reducing cost, footprint, and conduction losses in high-current paths. |
| Internal soft-start (16-lead only) | Single external capacitor controls startup dV/dt and prevents inrush-induced output overshoot or component stress. |
| Adjustable oscillator frequency | Enables optimization of inductor size, EMI profile, and efficiency across 100–500 kHz-without changing IC or layout. |
| MIN/MAX fast-clamp comparators | Provide ±3% output voltage fault protection within microseconds-decoupling stability compensation from transient response. |
| High gate drive capability | Drives 10,000 pF loads with sub-250 ns edges-supporting paralleled MOSFETs and low-RDS(ON) devices for >10 A designs. |
Applications
| Microprocessor Core Supply | Dual-Voltage Logic Board Regulation |
|---|---|
Use Scenario: Providing tightly regulated 3.3V at up to 10A to Intel Pentium® microprocessors in desktop and embedded computing platforms. IC Role / Device Role / Timing Role: Primary step-down controller managing dynamic load transients, thermal derating, and power-good sequencing. Use Value: ±1% regulation and fast transient response maintain CPU voltage within spec under 5A/µs load steps-preventing crashes or throttling. | Use Scenario: Local regulation of 3.3V I/O rails alongside 5V logic on mixed-voltage PCBs for industrial controllers and telecom line cards. IC Role / Device Role / Timing Role: Secondary buck controller delivering clean, isolated 3.3V power with minimal crosstalk from noisy 5V domains. Use Value: Separate PVCC1/PVCC2 supplies and Kelvin feedback reduce ground bounce-improving signal integrity for high-speed interfaces. |
| High-Current Battery-Powered Systems | Industrial Embedded Power Modules |
Use Scenario: Regulating 3.3V from nominal 5V Li-ion battery packs in portable test equipment and medical handhelds. IC Role / Device Role / Timing Role: Efficiency-optimized controller operating across wide input range (4.2V–5.5V) while maintaining low quiescent current. Use Value: 350 µA IQ and >90% efficiency at 1A extend battery life; shutdown mode draws only 1 µA for long-term storage. | Use Scenario: Integrated power stage in DIN-rail mounted PLC modules requiring robust, field-replaceable DC-DC conversion. IC Role / Device Role / Timing Role: Industrial-grade controller supporting –40°C to +85°C ambient, conformal coating, and 15-year lifecycle planning. Use Value: Guaranteed performance over full temperature range and qualified for extended reliability-reducing field failure risk in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3830EFE#TRPBF | Successor IC with integrated bootstrap diode, higher 500kHz max fOSC, and improved current-mode control; requires no external charge pump for PVCC1. | Designed for new designs requiring higher integration and tighter current regulation; not drop-in compatible due to different pinout and control architecture. | Select LTC3830EFE#TRPBF for next-generation designs prioritizing reduced external components and enhanced current accuracy. |
| TPS40200DR | Voltage-mode controller with fixed 300kHz fOSC, no internal soft-start, no RDS(ON) current sensing-requires external sense resistor and SS capacitor. | Targeted at cost-sensitive industrial supplies where ±2% regulation and simpler layout outweigh advanced features. | Choose TPS40200DR when BOM cost reduction is critical and ±1% regulation or integrated soft-start are not required. |
Compared with LTC1430IS#TRPBF, LTC3830EFE#TRPBF offers higher integration and modern control but mandates PCB redesign, while TPS40200DR sacrifices precision and feature set for lower unit cost-making LTC1430IS#TRPBF optimal for legacy-compatible, high-accuracy industrial buck designs.
Availability
LTC1430IS#TRPBF is available at Aetrix Electronics and suitable for microprocessor core supplies, dual-voltage logic board regulation, and industrial embedded power modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1430IS#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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and power management ICs for precision, industrial, and automotive applications.
The LTC1430 belongs to ADI's legacy Linear Technology high-power DC/DC controller product line, designed specifically for efficient, high-current step-down conversion in computing and industrial infrastructure where accuracy, thermal robustness, and external component minimization are critical.
FAQ
What is the operating temperature range of the LTC1430IS#TRPBF?
The LTC1430IS#TRPBF is rated for industrial operation from –40°C to +85°C. This specification is validated across all electrical parameters including reference accuracy, oscillator frequency, and gate driver timing-making it suitable for deployment in uncontrolled environments such as factory automation panels and outdoor telecom cabinets where ambient temperatures fluctuate widely.
Does the LTC1430IS#TRPBF support adjustable output voltage?
The LTC1430IS#TRPBF supports both fixed 3.3V output (using internal resistor divider with SENSE+/SENSE– pins) and adjustable output (via external resistor divider connected to FB pin). When using the external divider, SENSE+ and SENSE– must be left floating. The feedback reference voltage is 1.265V (typical) with ±0.015V tolerance over temperature-enabling precise custom voltage setting from ~1.3V to near input rail.
How does current limiting work on the LTC1430IS#TRPBF?
The LTC1430IS#TRPBF implements current limiting by sensing the voltage drop across the RDS(ON) of the upper N-channel MOSFET (M1) via the IFB pin during G1-on periods. The IMAX pin sets the threshold; when IFB falls below IMAX, the ILIM amplifier pulls current from the SS capacitor to reduce duty cycle. This method eliminates external sense resistors but provides fault-protection-level accuracy-not precision current measurement.
Can the LTC1430IS#TRPBF drive paralleled MOSFETs?
Yes, the LTC1430IS#TRPBF gate drivers (G1 and G2) are specified to drive up to 10,000 pF total gate capacitance-sufficient for multiple paralleled N-channel MOSFETs. In the documented 10A reference design, two MTD20N03HL devices are paralleled for M1. Layout best practices (matched gate traces, local gate resistors, Kelvin source connections) remain essential to ensure balanced current sharing and prevent oscillation.
What package type is used for the LTC1430IS#TRPBF?
The LTC1430IS#TRPBF is supplied in a 16-lead plastic SOIC package (S package), RoHS-compliant and moisture-sensitive level 3. It features exposed pad thermal enhancement and is distinct from the 8-lead PDIP/SO variants-only the 16-lead version includes current limit, soft-start, and frequency adjustability. Pin compatibility with other LTC1430 variants is not maintained across package types.
LTC1430IS#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
- Applications:
- Controller, Intel Pentium®
- Voltage - Input:
- 4V ~ 8V
- Number of Outputs:
- 1
- Voltage - Output:
- 3.3V, Adj
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LTC1430IS#TRPBF FAQ
1.How can I place an order for LTC1430IS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1430IS#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 LTC1430IS#TRPBF reliable?
The price and inventory of LTC1430IS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1430IS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1430IS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1430IS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1430IS#TRPBF?
LTC1430IS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1430IS#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 LTC1430IS#TRPBF?
For technical support, including LTC1430IS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1430IS#TRPBF requirements.
6.How does Aetrix verify that LTC1430IS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1430IS#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 LTC1430IS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1430IS#TRPBF?
All LTC1430IS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1430IS#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 LTC1430IS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1430IS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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