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onsemi NCP1593AMNTWG
- Part No.:
- NCP1593AMNTWG
- Manufacturer:
- onsemi
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
NCP1593AMNTWG.pdf
- Description:
- IC REG BUCK ADJ 3A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,250
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Product details
Overview
NCP1593AMNTWG from onsemi is a fixed-frequency, synchronous buck regulator integrating high-side P-channel (90 mΩ) and low-side N-channel (60 mΩ) MOSFETs, operating at 1 MHz with 4.0–5.5 V input to deliver up to 3 A at adjustable output voltages down to 0.6 V; used in LCD TVs, set-top boxes, and telecom power rails.
For engineers reviewing the NCP1593AMNTWG datasheet, pinout, applications, or equivalent options, key selection criteria include its DFN10 package thermal performance, hiccup-mode short-circuit protection, pre-biased startup capability, and internal soft-start timing control via external capacitor.
Technical Context
The NCP1593AMNTWG employs current-mode PWM control with a transconductance error amplifier and fixed 1 MHz oscillator (±13%), enabling fast transient response and stable loop compensation without external components. Its integrated power stage uses a high-side P-MOSFET and low-side N-MOSFET for efficient 3 A delivery.
Protection architecture includes cycle-by-cycle current limiting (5.1 A typ.), hiccup-mode short-circuit recovery, thermal shutdown at 185 °C (30 °C hysteresis), and UVLO with 2.5 V threshold and 320 mV hysteresis - all implemented internally without external sensing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.0 V to 5.5 V - supports single-cell Li-ion or 5 V rail systems without external LDO pre-regulation. |
| Output Voltage Range | 0.6 V to VIN × 95% - enables core voltage regulation for modern SoCs and FPGAs requiring sub-1 V supplies. |
| Switching Frequency | 1.0 MHz ±13% - allows compact 2.2 µH inductors and reduces EMI filtering burden vs. lower-frequency converters. |
| Max Output Current | 3 A continuous - sustained under thermal limits with proper PCB copper area and thermal vias on exposed pad. |
| Feedback Reference | 0.600 V ±1.5% - sets output accuracy; resistor divider tolerance directly impacts final VOUT precision. |
| Current Limit Threshold | 5.1 A typical - provides headroom above 3 A load while enabling robust short-circuit handling before hiccup activation. |
| Soft-Start Time | 0.58 ms default (SS open) - limits inrush current during power-up; adjustable up to 10 ms with external capacitor. |
| Thermal Shutdown | 185 °C junction, 30 °C hysteresis - prevents permanent damage during overload or poor heatsinking; auto-restarts after cooldown. |
Pinout & Package
Package: DFN10 (3 mm × 3 mm, 0.5 mm pitch), thermally enhanced with exposed pad (EP) soldered to PCB ground plane for optimal thermal dissipation (RJA = 68 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC/LX) | No-connect for NCP1593A / LX for NCP1593B | Must be left floating or grounded on NCP1593AMNTWG; not connected to internal power stage. |
| 2, 3 (LX) | Switch node | Drain connection of both internal MOSFETs; ties directly to inductor; high di/dt path requiring short, wide traces. |
| 4 (PG) | Open-drain Power Good | Signals regulation status (high-Z when FB ≥ 90% VREF); requires external pull-up for system sequencing. |
| 5 (EN) | Enable input | Active-high logic control (VENHI = 1.4 V); internal pull-up ensures default-on if unconnected. |
| 6 (FB) | Feedback input | Senses output via resistor divider; error amplifier compares to 0.6 V reference to regulate VOUT. |
| 7 (SS/NC) | Soft-start timing | Capacitor-to-ground sets ramp time; open = 0.58 ms; NCP1593AMNTWG uses this pin (NCP1593B does not). |
| 8 (VCC) | Bias supply | Powers internal logic; bypass with 0.1 µF ceramic; must connect directly to VCCP pin on PCB. |
| 9, 10 (VCCP) | Power-stage input | Supplies gate drivers and high-side MOSFET; separate from VCC to isolate noise-sensitive bias circuitry. |
| EP (GND) | Exposed thermal pad | Electrical ground and primary thermal path; must be soldered to large PCB ground plane with ≥6 thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 90 mΩ P-ch HS + 60 mΩ N-ch LS enables >90% efficiency at 3 A without external drivers or discrete switches. |
| 100% duty cycle operation | Allows dropout-free regulation near input rail - extends battery runtime in portable 5 V-input applications. |
| Diode emulation mode | Disables low-side FET at light load to prevent reverse inductor current, improving light-load efficiency over forced CCM. |
| Pre-biased output startup | Enables safe start-up when output capacitors are pre-charged - critical for hot-swap and multi-rail sequencing systems. |
| Hiccup-mode short-circuit protection | Shuts down, waits 4×tSS, then retries - limits average power dissipation during fault while enabling automatic recovery. |
| Internal soft-start | Linear 0.58 ms ramp (adjustable) prevents output overshoot and inrush stress on input caps and downstream loads. |
Applications
| Set-Top Box Power Rails | DVD/HDD Drive Core Supply |
|---|---|
Use Scenario: Regulating 1.05 V or 1.8 V core voltage for MPEG decoder SoCs and servo controllers in consumer media devices. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering tightly regulated, low-noise DC power with fast load transient response. Use Value: Achieves >92% efficiency at 2 A with minimal external components, reducing board space and thermal load in compact enclosures. | Use Scenario: Providing stable 3.3 V or 1.8 V supply to optical pickup units and spindle motor drivers in DVD burners and 2.5″ HDDs. IC Role / Device Role / Timing Role: High-current DC-DC regulator with hiccup-mode fault recovery to withstand motor stall currents and ESD events. Use Value: Internal current limit (5.1 A) and thermal shutdown (185 °C) prevent latch-up during mechanical jams or cable disconnects. |
| LCD Monitor Logic Supply | USB Modem Baseband Power |
Use Scenario: Generating 1.2 V GPU and 3.3 V I/O rails for display controller ICs in 1080p monitors with thin bezels. IC Role / Device Role / Timing Role: Compact, thermally efficient buck regulator mounted near processor die to minimize IR drop and noise coupling. Use Value: DFN10 package with exposed pad achieves <15 °C/W θJA with 2-in² copper, enabling silent fanless operation. | Use Scenario: Powering LTE baseband processors and RF front-end ICs in compact USB dongles with strict size constraints. IC Role / Device Role / Timing Role: Input-capacitor–efficient 1 MHz buck converter supporting dynamic load steps from idle to full transmit burst. Use Value: 35 ns minimum on-time and current-mode control ensure stable regulation during 10 A/ms load transients without external compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | Fixed 1.5 MHz fSW; 3.3 A rating; 4.5–24 V input; no pre-bias startup support | Better suited for higher-input industrial rails; lacks hiccup-mode recovery and 100% duty cycle | Select when wider VIN range and higher switching frequency outweigh need for battery-friendly features. |
| TPS54331DR | Adjustable fSW (300 kHz–2 MHz); 3 A; 3.5–28 V input; external MOSFETs required | Offers design flexibility but increases BOM count and layout complexity; no integrated power stage | Choose when thermal management demands discrete FETs or when input exceeds 5.5 V. |
Compared with MP2315DJ-LF-Z and TPS54331DR, the NCP1593AMNTWG delivers superior integration for 5 V-input systems - combining fixed 1 MHz operation, pre-biased startup, and hiccup-mode protection in a thermally optimized DFN10 package - making it ideal for space-constrained consumer electronics where reliability and ease of use are prioritized over input voltage range or frequency tuning.
Availability
NCP1593AMNTWG is available at Aetrix Electronics and suitable for LCD monitors, set-top boxes, and USB modems requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP1593AMNTWG 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and consumer markets.
The NCP1593AMNTWG belongs to onsemi's high-efficiency DC-DC converter product line, designed specifically for compact, high-current point-of-load regulation in cost-sensitive consumer electronics with stringent thermal and EMI constraints.
FAQ
What is the maximum output current capability of the NCP1593AMNTWG under continuous operation?
The NCP1593AMNTWG delivers up to 3 A continuously when properly thermally managed - using the DFN10 package's exposed pad soldered to ≥2 in² of 1 oz. copper with ≥6 thermal vias. At ambient temperatures above 60 °C or with limited airflow, derating applies per the RJA = 68 °C/W specification and thermal shutdown threshold of 185 °C. The NCP1593AMNTWG's internal current limit is 5.1 A typical, providing margin for transient peaks.
Does the NCP1593AMNTWG support startup into a pre-biased output voltage?
Yes, the NCP1593AMNTWG explicitly supports pre-biased startup - it holds off switching until the internal soft-start ramp reaches the existing FB pin voltage, preventing reverse current flow into a charged output capacitor. This behavior is confirmed in the datasheet's "Pre-Bias Startup" section and is critical for hot-swap and multi-rail power sequencing. The NCP1593AMNTWG implements this without external components, distinguishing it from many competing buck regulators.
What is the purpose of the separate VCC and VCCP pins on the NCP1593AMNTWG?
The NCP1593AMNTWG separates VCC (pin 8) and VCCP (pins 9–10) to isolate noise-sensitive bias circuitry from high-current power-stage switching. VCC powers the internal logic, error amplifier, and oscillator using a 0.1 µF ceramic bypass cap, while VCCP supplies gate drivers and the high-side MOSFET directly from the input source. This separation minimizes coupling of LX node transients into control circuitry, improving stability and noise immunity - a key design feature validated in the NCP1593AMNTWG's application circuit and layout guidelines.
How does the hiccup-mode short-circuit protection work in the NCP1593AMNTWG?
When the NCP1593AMNTWG detects overcurrent for seven consecutive cycles, it enters hiccup mode: both MOSFETs turn OFF, the compensation network discharges, and the IC waits 4×tSS (e.g., ~2.3 ms for default soft-start) before attempting a full soft-start recovery. This cycle repeats until the fault clears. Unlike latch-off protection, hiccup mode limits average power dissipation (<100 mW typical) and enables automatic system recovery - a verified behavior documented in Figure 26 of the NCP1593AMNTWG datasheet.
Can the NCP1593AMNTWG operate at 100% duty cycle, and what is its practical benefit?
Yes, the NCP1593AMNTWG supports true 100% duty cycle operation when VOUT > d.c.MAX × VIN - meaning it can maintain regulation with no switching, effectively acting as a low-dropout linear regulator. This extends battery life in portable 5 V-input systems by eliminating switching losses when input voltage approaches output voltage, such as during battery discharge. The NCP1593AMNTWG's datasheet specifies d.c.LDO = 100% and confirms this behavior under light-load conditions with diode emulation disabled.
NCP1593AMNTWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.23V
- Current - Output:
- 3A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
NCP1593AMNTWG FAQ
1.How can I place an order for NCP1593AMNTWG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1593AMNTWG 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 NCP1593AMNTWG reliable?
The price and inventory of NCP1593AMNTWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1593AMNTWG is usually 5 days.
3.What payment methods are accepted for NCP1593AMNTWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1593AMNTWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1593AMNTWG?
NCP1593AMNTWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1593AMNTWG 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 NCP1593AMNTWG?
For technical support, including NCP1593AMNTWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1593AMNTWG requirements.
6.How does Aetrix verify that NCP1593AMNTWG is sourced from the original manufacturer or authorized distributors?
All NCP1593AMNTWG 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 NCP1593AMNTWG meets industry standards.
7.What is the process for return or replacement of NCP1593AMNTWG?
All NCP1593AMNTWG units undergo pre-shipment inspection (PSI). If there is an issue with NCP1593AMNTWG, 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 NCP1593AMNTWG part is unused and in its original packaging.
Return procedure for NCP1593AMNTWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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