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Analog Devices Inc. LTC1430AIGN#PBF
- Part No.:
- LTC1430AIGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1430AIGN#PBF.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,595
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Product details
Overview
LTC1430AIGN#PBF from Analog Devices (formerly Linear Technology) is a high-power synchronous step-down switching regulator controller optimized for 5V-to-3.3V/2.xV conversion in CPU power supplies. It features ±1% output regulation over line, load, and temperature; 93.5% max duty cycle; internal 200kHz PWM oscillator adjustable from 100kHz to >500kHz; and all-N-channel MOSFET drive capability. It targets Pentium II and AMD-K6 microprocessor power delivery.
For engineers reviewing the LTC1430AIGN#PBF datasheet, LTC1430AIGN#PBF pinout, LTC1430AIGN#PBF application, or LTC1430AIGN#PBF equivalent, key selection considerations include its 16-lead SSOP package, current-sense-via-RDS(ON) architecture eliminating external sense resistors, 350µA quiescent current, shutdown current of 1µA, and compatibility with logic-level or standard N-channel MOSFETs in high-current buck converters.
Technical Context
The LTC1430AIGN#PBF implements a voltage-mode PWM control loop with precision 1.265V internal reference and transconductance error amplifier (gmV = 350–1100 µmho). Its dual comparator-based MIN/MAX protection circuit enforces fast 3% over/under-voltage response independent of main loop compensation.
It integrates two independent gate drivers (G1, G2) with non-overlap timing (25–250 ns), supports charge-pump-based high-side gate drive via PVCC1, and includes dedicated current-limit sensing (IFB/IMAX) and soft-start (SS) circuits - all exclusive to the 16-lead GN package variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Regulation | ±1% over line, load, and temperature - enables stable 3.3V supply for sensitive microprocessors without post-regulation. |
| Max Duty Cycle | 93.5% typical - allows 3.3V output from 5V input with margin, critical for low-VOUT/VIN ratio designs. |
| Oscillator Frequency | 100–500 kHz adjustable - permits optimization of inductor size, efficiency, and EMI filtering. |
| Quiescent Current | 350 µA typical - sustains >90% efficiency at light loads (1A–50A range) and extends battery runtime in portable systems. |
| Shutdown Current | 1 µA - ensures negligible standby drain in always-on or sleep-mode applications. |
| Current Sense Method | RDS(ON)-based upper-FET sensing - eliminates discrete 5–10 mΩ sense resistor, reducing BOM count and PCB losses. |
| Driver Gate Drive Strength | Drives up to 10,000 pF total gate capacitance - supports paralleled MOSFETs for >10A output designs. |
Pinout & Package
The LTC1430AIGN#PBF is housed in a 16-lead plastic SSOP (GN) package with exposed pad for thermal enhancement (θJA = 130°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G1 | High-side N-MOSFET gate driver output | Swings from PGND to PVCC1; drives Q1 gate with non-overlap timing to prevent shoot-through. |
| PVCC1 | High-side driver power supply | Must exceed PVCC + VGS(ON)(Q1); typically generated by charge pump for 5V input systems. |
| PGND | Power ground return for both drivers | Low-impedance connection point near Q2 source to minimize noise coupling into feedback path. |
| GND | Signal ground for internal circuitry | Must tie to PGND at device pin to avoid ground-loop-induced regulation error (>±1% spec). |
| SENSE–, FB, SENSE+ | Feedback node interface | Supports internal 3.3V divider (SENSE+/SENSE– tied) or external resistor network (FB only) - enables flexible output voltage setting. |
| SHDN | TTL-compatible enable/disable input | Active-low with 50 µs debounce; pulls supply current to 1 µA and forces G1/G2 low during shutdown. |
| SS | Soft-start capacitor connection | Controls startup slew rate and stabilizes current-limit loop entry/exit - prevents inrush overshoot. |
| IFB / IMAX | Current-limit sense and threshold inputs | IFB monitors Q1 RDS(ON) voltage drop; IMAX sets trip threshold - enables adjustable, resistor-free current limiting. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous N-MOSFET architecture | Eliminates body-diode conduction loss in low-side switch, enabling >95% efficiency at 10A output. |
| Internal current limit via RDS(ON) | Removes need for 5–10 mΩ external sense resistor, reducing cost, board space, and power loss in high-current paths. |
| Dual comparator over/under-voltage protection | MIN/MAX comparators respond within microseconds to 3% output deviation - prevents system crash during transient load steps. |
| Adjustable oscillator frequency | Resistor-programmable 100–500 kHz range allows trade-off between inductor size, efficiency, and EMI compliance. |
| Charge-pump compatible high-side drive | Enables use of low-cost standard N-channel MOSFETs even with 5V input - avoids expensive P-channel or high-VGS devices. |
Applications
| Microprocessor Core Power Supply | Local Dual-Voltage Logic Regulation |
|---|---|
Use Scenario: Delivering tightly regulated 3.3V/10A to Pentium II or AMD-K6 CPU core under dynamic load conditions. IC Role / Device Role / Timing Role: Primary voltage-mode PWM controller managing synchronous buck topology with fast transient response. Use Value: ±1% regulation and 93.5% duty cycle ensure stable core voltage across full load range; MIN/MAX comparators suppress >200 mA/µs load steps without droop. | Use Scenario: Providing isolated 3.3V rail on mixed-voltage logic boards alongside 5V I/O supplies. IC Role / Device Role / Timing Role: Local DC/DC controller enabling point-of-load regulation with minimal layout impact. Use Value: All-N-MOSFET drive and RDS(ON) current sensing reduce component count and thermal footprint vs. traditional controllers with sense resistors. |
| High-Current Battery-Powered System | GTL Logic Termination Supply |
Use Scenario: Converting 5V battery pack to 3.3V for portable instrumentation requiring >10A peak current. IC Role / Device Role / Timing Role: High-efficiency step-down controller supporting wide input range and low-quiescent operation. Use Value: 350 µA quiescent current extends battery life; synchronous architecture maintains >90% efficiency from 1A to 50A, minimizing heat generation. | Use Scenario: Supplying bidirectional 3.3V termination for GTL+ bus interfaces where sink current capability is required. IC Role / Device Role / Timing Role: Synchronous buck controller enabling controlled current sinking during bus signal transitions. Use Value: Bidirectional conduction capability of Q2 allows active pull-down without external components - essential for GTL signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3830EFE#PBF | Pin-compatible upgrade with integrated bootstrap diode, lower 75 µA quiescent current, and enhanced current-mode control. | Supports higher switching frequencies (up to 1 MHz) and tighter current limit accuracy; requires no external bootstrap capacitor. | Select for new designs requiring improved light-load efficiency, faster transient response, or reduced external component count. |
| TPS54620RGYR | 6-V to 18-V input, 2.2-MHz fixed-frequency current-mode controller with integrated FET drivers and PMBus interface. | Targets industrial/high-voltage input systems; lacks RDS(ON) current sensing but adds digital telemetry and fault logging. | Select when input voltage exceeds 13V, digital monitoring is needed, or higher-frequency operation reduces magnetics size. |
Compared with LTC1430AIGN#PBF, LTC3830EFE#PBF offers superior light-load efficiency and simplified layout via integrated bootstrap, while TPS54620RGYR provides wider VIN range and digital configurability at the cost of higher complexity and no RDS(ON) sensing.
Availability
LTC1430AIGN#PBF is available at Aetrix Electronics and suitable for Pentium II/AMD-K6 power supplies, local dual-voltage logic regulation, and high-current battery-powered systems requiring stable component supply and long-term obsolescence management.
Supply support for LTC1430AIGN#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC1430AIGN#PBF belongs to Linear's legacy high-power DC/DC controller product line, designed specifically for efficient, compact, and robust CPU core voltage regulation in computing and embedded systems.
FAQ
What is the maximum output current supported by the LTC1430AIGN#PBF?
The LTC1430AIGN#PBF is rated for designs exceeding 10A output current, with documented operation up to 50A using paralleled MOSFETs and appropriate thermal design. Its gate drivers support up to 10,000pF total gate capacitance, and its RDS(ON)-based current limit accommodates high-current layouts without external sense resistors. Actual achievable current depends on MOSFET selection, inductor rating, and PCB thermal performance.
Does the LTC1430AIGN#PBF require an external current sense resistor?
No, the LTC1430AIGN#PBF does not require an external current sense resistor. It implements current limiting by sensing the voltage drop across the RDS(ON) of the upper N-channel MOSFET (Q1) via the IFB pin. This architecture eliminates the power loss, board space, and cost associated with discrete 5–10 mΩ sense resistors - a key differentiator of the LTC1430AIGN#PBF versus conventional controllers.
What package type is used for the LTC1430AIGN#PBF?
The LTC1430AIGN#PBF uses a 16-lead plastic SSOP (Small Outline Package) with exposed thermal pad, designated as the GN package. This package provides θJA = 130°C/W and supports the full feature set including current limit, soft start, and frequency adjustability - features absent in the 8-lead SO variants like LTC1430ACS8.
Can the LTC1430AIGN#PBF operate with a 5V input to generate 3.3V output?
Yes, the LTC1430AIGN#PBF is explicitly optimized for 5V-to-3.3V conversion. Its 93.5% maximum duty cycle, ±1% output regulation, and synchronous N-MOSFET architecture enable high-efficiency operation in this configuration. The datasheet includes a verified 5V-to-3.3V/10A reference design (Figure 1), confirming suitability for Pentium II and AMD-K6 microprocessor core supplies.
How does the LTC1430AIGN#PBF achieve fast transient response?
The LTC1430AIGN#PBF achieves fast transient response through three integrated mechanisms: (1) a dual-comparator MIN/MAX protection circuit that overrides the main feedback loop within microseconds for ±3% output deviations; (2) a transconductance error amplifier with gmV up to 1100 µmho for rapid error correction; and (3) non-overlap timing (25–250 ns) between G1 and G2 drivers to prevent shoot-through and maintain loop stability during aggressive load steps.
LTC1430AIGN#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
- Applications:
- Controller, Intel Pentium® II, AMD-K6®
- Voltage - Input:
- 4V ~ 8V
- Number of Outputs:
- 1
- Voltage - Output:
- 3.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC1430AIGN#PBF FAQ
1.How can I place an order for LTC1430AIGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1430AIGN#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 LTC1430AIGN#PBF reliable?
The price and inventory of LTC1430AIGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1430AIGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1430AIGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1430AIGN#PBF transactions.
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4.How is shipping managed for LTC1430AIGN#PBF?
LTC1430AIGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1430AIGN#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 LTC1430AIGN#PBF?
For technical support, including LTC1430AIGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1430AIGN#PBF requirements.
6.How does Aetrix verify that LTC1430AIGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1430AIGN#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 LTC1430AIGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1430AIGN#PBF?
All LTC1430AIGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1430AIGN#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 LTC1430AIGN#PBF part is unused and in its original packaging.
Return procedure for LTC1430AIGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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