My Inquiry
My Account
Analog Devices Inc. LTC1430ACS#PBF
- Part No.:
- LTC1430ACS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1430ACS#PBF.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,892
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1430ACS#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 and dual-voltage logic boards. It features ±1% output regulation over line, load, and temperature; 93.5% maximum duty cycle; internal 1.265V reference; and drives external N-channel MOSFETs without requiring a P-channel device or external current-sense resistor.
For engineers reviewing the LTC1430ACS#PBF datasheet, LTC1430ACS#PBF pinout, LTC1430ACS#PBF application, or LTC1430ACS#PBF equivalent, this page delivers verified technical context, package-specific pin functions, real-world efficiency data (≥95% at 10A), confirmed thermal specs (0°C to 70°C), and validated alternative parts for high-current buck converter design.
Technical Context
The LTC1430ACS#PBF implements a fixed-frequency voltage-mode PWM control architecture with an internal 200kHz oscillator (adjustable 100–500kHz via FREQSET). Its feedback loop uses a transconductance error amplifier (gmV = 350–650 µmho) comparing SENSE+/SENSE– voltage against a trimmed 1.265V reference, delivering ±1% regulation across 0°C–70°C.
As an 8-lead SOIC variant, it lacks current-limit sensing (IFB/IMAX), internal soft-start (SS), and frequency adjustability-features exclusive to the 16-lead GN/SO packages. It integrates dual gate drivers (G1/G2) capable of driving 10,000pF loads, with non-overlap timing (25–250ns) and 350µA quiescent current (1µA in shutdown).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Synchronous buck controller - eliminates external diode and sense resistor by using upper N-FET RDS(ON) for current limiting. |
| Output Regulation | ±1% over line, load, and temperature - ensures stable 3.3V output under 0–10A load shifts and 4.75–5.25V input variation. |
| Max Duty Cycle | 93.5% typical - enables 3.3V output from 5V input with margin for dropout and transient response. |
| Oscillator Freq | 200kHz nominal (140–260kHz over temp) - balances EMI, inductor size, and efficiency for 5V→3.3V/10A designs. |
| Quiescent Current | 350µA typical - supports >90% efficiency down to ~1A output while minimizing no-load losses. |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade embedded and computing power applications. |
| Package | 8-lead SOIC (S8) - surface-mount, JEDEC MS-012AC compliant, θJA = 150°C/W. |
Pinout & Package
8-lead plastic SOIC (S8) package with exposed pad not present; θJA = 150°C/W; RoHS-compliant, lead-free (Pb-free) finish per #PBF suffix.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| G1 | Upper N-FET gate driver output | Swings from PGND to PVCC1; drives Q1 gate; low when G2 is high to prevent shoot-through. |
| PVCC1 | Power supply for G1 driver | Must be ≥ PVCC + VGS(ON) of Q1; typically 12V for 5V PVCC; requires local bypass capacitor. |
| PGND | Power ground return for both drivers | Low-impedance connection point near Q2 source; tied internally to GND in S8 package. |
| GND | Signal ground for internal circuitry | Connected to PGND at package pin; minimizes ground-loop errors in feedback path. |
| SENSE+, FB, SENSE− | Feedback node interface | In S8: SENSE+ → COUT+, SENSE− → GND, FB floating for 3.3V internal divider; external divider connects to FB only. |
| SHDN | Shutdown enable input | TTL-compatible; <0.8V for >50µs forces shutdown (IQ ≤ 10µA); >2.4V enables normal operation. |
| VCC/PVCC2 | Combined supply for logic + lower gate driver | Single pin supplies internal circuits and G2; requires ≥10µF low-ESR bypass to GND; RC filter recommended from PVCC. |
| COMP | Error amplifier output / PWM input | Connects external RC compensation network; sets loop stability and transient response for buck converter. |
Key Features
| Feature | Design Value |
|---|---|
| All-N-channel MOSFET support | Eliminates costly P-channel upper FET and reduces conduction loss vs. diode-based buck topologies. |
| No external current-sense resistor | Uses Q1 RDS(ON) for current limit detection - cuts BOM count and PCB area in high-current paths. |
| High-efficiency operation | Enables >95% peak efficiency at 10A (5V→3.3V) due to synchronous rectification and low 350µA quiescent current. |
| Robust gate drive capability | Drives up to 10,000pF total gate capacitance - supports paralleled MOSFETs for >10A output designs. |
| Thermally optimized SOIC package | 150°C/W junction-to-ambient thermal resistance - suitable for compact, convection-cooled power stages. |
Applications
| Power Supply for Pentium® II Microprocessors | High-Power 5V-to-3.3V Regulator |
|---|---|
Use Scenario: Delivering tightly regulated 3.3V/10A to Intel Pentium II CPUs with fast load-transient response during instruction execution bursts. IC Role / Device Role / Timing Role: Primary voltage-mode PWM controller managing synchronous buck stage with dual N-FETs and internal 1.265V reference. Use Value: ±1% regulation and 93.5% max duty cycle maintain 3.3V under worst-case 5V rail sag and dynamic load steps up to 5A/µs. | Use Scenario: Local point-of-load regulation on dual-voltage logic boards where 5V system rail powers 3.3V I/O and core logic. IC Role / Device Role / Timing Role: Step-down controller generating clean 3.3V from noisy 5V backplane, using SENSE+/SENSE− for Kelvin sensing at output capacitor. Use Value: Internal feedback divider and 350µA quiescent current enable simple, efficient, low-component-count 3.3V generation without external resistors. |
| Low-Voltage, High-Current Battery Regulation | Local Regulation for AMD-K6® Microprocessors |
Use Scenario: Converting 5V battery-derived input to 2.5V/8A for portable computing subsystems with thermal constraints. IC Role / Device Role / Timing Role: Synchronous buck controller operating at 200kHz to minimize inductor size while maintaining >90% efficiency at 5A–10A loads. Use Value: 93.5% duty cycle allows deep dropout (5V→2.5V) without compromising transient headroom or requiring oversized magnetics. | Use Scenario: Providing stable 3.3V/10A to AMD-K6 microprocessors in desktop motherboards with tight voltage tolerance requirements. IC Role / Device Role / Timing Role: Primary power controller implementing MIN/MAX fast-response comparators (±3% of 1.265V) to clamp output during load transients. Use Value: MIN/MAX comparators force full or zero duty cycle within nanoseconds - preventing >100mV output deviation during 5A load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3703-5 | 5V fixed-output version; includes current-mode control, programmable soft-start, and enhanced current-sense accuracy. | Designed for newer 5V-input, 5V-output applications; lacks adjustable output but adds cycle-by-cycle current limiting. | Select LTC3703-5 for designs requiring tighter current limit accuracy and simplified 5V-out implementation. |
| MP2307 | Integrated 2A synchronous buck converter (not controller); no external FET support; fixed 500kHz frequency. | Targeted at low-power, cost-sensitive applications (<3A); unsuitable for >5A or custom FET selection. | Choose MP2307 only for space-constrained, sub-3A designs where integration outweighs flexibility and scalability. |
Compared with LTC1430ACS#PBF, LTC3703-5 offers superior current sensing and soft-start but locks output to 5V, while MP2307 trades external FET control and scalability for monolithic simplicity and lower BOM count in low-current roles.
Availability
LTC1430ACS#PBF is available at Aetrix Electronics and suitable for CPU power supplies, dual-voltage logic boards, and high-current battery regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1430ACS#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 LTC1430A product line was designed specifically for high-efficiency, high-current synchronous buck conversion in computing and embedded power systems, emphasizing thermal robustness, regulation precision, and external FET flexibility.
FAQ
What is the maximum output current supported by the LTC1430ACS#PBF?
The LTC1430ACS#PBF is a controller-not a regulator-and does not define maximum output current inherently. Its design supports >10A output when paired with appropriately rated external N-channel MOSFETs (e.g., Motorola MTD20N03HL), inductors (e.g., 2.7µH/15A), and input/output capacitors. Real-world validation shows stable 10A operation at 95%+ efficiency in 5V→3.3V configurations, as confirmed in the LTC1430A datasheet Figure TA01 and TA02.
Does the LTC1430ACS#PBF include current-limit protection?
No, the LTC1430ACS#PBF (8-lead SOIC) does not include current-limit functionality. Current limit sensing via IFB and IMAX pins, along with internal soft-start and frequency adjustability, is exclusive to the 16-lead GN and SO packages (e.g., LTC1430ACGN). The S8 variant relies on external circuit protection or system-level current monitoring.
What is the purpose of the VCC/PVCC2 pin on the LTC1430ACS#PBF?
The VCC/PVCC2 pin on the LTC1430ACS#PBF serves a dual role: it supplies power to all internal low-power circuitry (VCC function) and provides gate drive voltage for the lower N-channel MOSFET driver (G2). Because it combines both functions, the pin requires ≥10µF low-ESR bypass capacitance and benefits from an RC filter from the main PVCC rail to suppress noise coupling into sensitive analog blocks.
Can the LTC1430ACS#PBF be used for 3.3V input applications?
Yes, the LTC1430ACS#PBF supports 3.3V input operation when configured with appropriate external components: PVCC = 3.3V, VCC/PVCC2 = 5V (for sufficient G2 gate drive), and PVCC1 ≥ 5V + VGS(ON) of Q1 (typically generated via charge pump). This configuration is explicitly validated in the Applications Information section and enables efficient 3.3V-in, 2.5V-out or 1.8V-out conversion in low-voltage systems.
What thermal derating applies to the LTC1430ACS#PBF in its SOIC package?
The LTC1430ACS#PBF in 8-lead SOIC has a junction-to-ambient thermal resistance (θJA) of 150°C/W. With a maximum junction temperature (TJMAX) of 150°C and ambient temperature of 70°C, the allowable power dissipation is limited to (150°C − 70°C)/150°C/W = 0.53W. This aligns with typical operating conditions where internal bias and driver losses remain well below this threshold, especially given its 350µA quiescent current and efficient gate-driving architecture.
LTC1430ACS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LTC1430ACS#PBF FAQ
1.How can I place an order for LTC1430ACS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1430ACS#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 LTC1430ACS#PBF reliable?
The price and inventory of LTC1430ACS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1430ACS#PBF is usually 5 days.
3.What payment methods are accepted for LTC1430ACS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1430ACS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1430ACS#PBF?
LTC1430ACS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1430ACS#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 LTC1430ACS#PBF?
For technical support, including LTC1430ACS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1430ACS#PBF requirements.
6.How does Aetrix verify that LTC1430ACS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1430ACS#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 LTC1430ACS#PBF meets industry standards.
7.What is the process for return or replacement of LTC1430ACS#PBF?
All LTC1430ACS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1430ACS#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 LTC1430ACS#PBF part is unused and in its original packaging.
Return procedure for LTC1430ACS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1430ACS#PBF Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
