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onsemi NCP1593BMNTWG
- Part No.:
- NCP1593BMNTWG
- Manufacturer:
- onsemi
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
NCP1593BMNTWG.pdf
- Description:
- IC REG BUCK ADJ 3A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,756
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Product details
Overview
NCP1593BMNTWG from onsemi is a fixed-frequency, synchronous buck regulator integrating high-side P-channel (90 mΩ) and low-side N-channel (60 mΩ) MOSFETs, delivering up to 3 A output current at 1 MHz switching frequency with input range 4.0 V–5.5 V and adjustable output down to 0.6 V. It serves as the primary DC-DC conversion stage in space-constrained consumer electronics requiring high efficiency and light-load diode emulation.
For engineers reviewing the NCP1593BMNTWG 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 ramp time of 500 µs - all critical for reliable power delivery in set-top boxes, LCD TVs, and USB modems.
Technical Context
The NCP1593BMNTWG employs internally compensated current-mode control with a transconductance error amplifier, enabling fast transient response and stable loop behavior without external compensation components. Its fixed 1 MHz oscillator provides predictable EMI profile and simplifies filter design.
It integrates cycle-by-cycle current limiting, thermal shutdown at 185 °C with 30 °C hysteresis, and open-drain Power Good (PG) logic that asserts after FB reaches 90% of regulation and deasserts below 85%. The device supports 100% duty cycle operation and starts up with pre-biased output loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.0 V to 5.5 V - compatible with single-cell Li-ion or 5 V rail systems without external LDO pre-regulation. |
| Output Voltage Range | 0.6 V to VIN - enables core voltage regulation for modern SoCs and FPGAs via external resistor divider on FB pin. |
| Switching Frequency | 1.0 MHz ±13% - balances inductor size, efficiency, and EMI filtering requirements for compact designs. |
| Continuous Output Current | 3 A - supported by integrated 90 mΩ P-MOSFET and 60 mΩ N-MOSFET with thermal shutdown at 185 °C. |
| Feedback Reference Voltage | 0.6 V ±1.5% - ensures tight output regulation across −40 °C to +125 °C junction temperature range. |
| Soft-Start Time | 500 µs (default) - limits inrush current during power-up; adjustable up to 10 ms via external capacitor on SS pin. |
| Power Good Threshold | FB = 0.51 V to 0.54 V (rising), 0.48 V to 0.51 V (falling) - provides precise system power sequencing with 30 mV hysteresis. |
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 | LX | Drain node of internal high-side P-MOSFET and low-side N-MOSFET - connects directly to output inductor and must be routed with minimal parasitic inductance. |
| 2, 3 | LX | Parallel LX terminals - reduce conduction loss and thermal stress under 3 A load; require symmetric layout to balance current sharing. |
| 4 | PG | Open-drain Power Good output - requires external pull-up resistor; signals valid regulation when FB ≥ 90% of target voltage. |
| 5 | EN | Logic-enable input with internal 1.4–3.0 µA pull-up - active-high; enables device when >1.4 V, disables when <0.4 V. |
| 6 | FB | Feedback input to transconductance error amplifier - sets output voltage via resistor divider (VOUT = 0.6 V × (1 + R1/R2)). |
| 7 | NC | No-connect pin for NCP1593B - must be left floating; differs from NCP1593A which uses this pin as SS. |
| 8 | VCC | Bias supply for internal circuitry - requires 0.1 µF ceramic capacitor to GND; must be connected directly to VCCP. |
| 9, 10 | VCCP | Power-stage input - supplies gate drive and high-current paths; decoupled separately from VCC for noise isolation. |
| EP | GND | Exposed thermal pad - electrically and thermally connected to internal ground; must be soldered to large PCB copper area with multiple vias. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 90 mΩ P-channel high-side + 60 mΩ N-channel low-side - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Hiccup-mode short-circuit protection | Auto-restarts after 4×tSS delay (~2 ms default) - limits average power dissipation during sustained fault while preserving system uptime. |
| Diode emulation at light load | Disables low-side FET conduction below ~300 mA - prevents reverse inductor current and improves efficiency in discontinuous conduction mode (DCM). |
| Pre-biased output startup | Delays switching until soft-start ramp exceeds FB voltage - avoids output voltage collapse when powering into pre-charged capacitors. |
| 100% duty cycle operation | Enables dropout mode when VOUT > d.c.MAX × VIN - extends battery life in portable devices by bypassing switching losses during low-input conditions. |
Applications
| Set-Top Box Power Supply | LCD TV Core Voltage Regulation |
|---|---|
|
Use Scenario: Regulating 1.05 V or 1.2 V core voltage for MPEG decoder SoC under dynamic video decoding load. IC Role / Device Role / Timing Role: Primary synchronous buck converter supplying up to 3 A peak current with fast transient response to handle burst-mode processing. Use Value: Internal current-mode control and 35 ns minimum on-time enable stable regulation during rapid load steps from 100 mA to 3 A within 200 µs. |
Use Scenario: Generating 1.8 V logic rail for timing controller and panel interface ICs in 24–55 inch LCD TVs. IC Role / Device Role / Timing Role: High-efficiency DC-DC stage operating at 1 MHz to minimize inductor size while maintaining >90% efficiency at 2 A load. Use Value: Diode emulation and 100% duty cycle mode reduce no-load power to <3 µA and extend standby time without compromising dynamic performance. |
| USB Modem Baseband Power | Cable Modem PHY Voltage Rail |
|
Use Scenario: Providing 3.3 V or adjustable 2.5 V supply to LTE/5G baseband processor in compact USB dongle form factor. IC Role / Device Role / Timing Role: Compact, thermally robust buck regulator in DFN10 package meeting strict board area constraints and thermal limits. Use Value: Exposed pad and 68 °C/W RJA allow full 3 A operation at +70 °C ambient without derating when mounted on 2-layer PCB with 1 in² copper pour. |
Use Scenario: Delivering clean, regulated 1.0 V or 1.2 V to DOCSIS-compliant cable modem PHY chip with stringent ripple (<10 mVpp) requirements. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buck converter leveraging internal soft-start and PG signaling for safe system boot sequence. Use Value: Power Good output with 30 mV hysteresis ensures reliable microcontroller reset assertion only after output settles within ±1.5% of target voltage. |
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 (Monolithic Power Systems) | Fixed 2 MHz switching, 2 A rating, 120 mΩ/70 mΩ MOSFETs, no PG pin, different pinout. | Lacks Power Good output and hiccup-mode protection; better suited for cost-sensitive, lower-current apps where footprint is secondary. | Select MP2315DJ-LF-Z only if 2 MHz operation and absence of PG sequencing are acceptable; not drop-in due to pin mismatch and lower current capability. |
| TPS563201 (Texas Instruments) | Adjustable 300 kHz–2.2 MHz frequency, 3 A rating, 52 mΩ/28 mΩ MOSFETs, integrated PG, but requires external compensation. | Higher efficiency at light load due to DCM mode, but demands careful loop tuning; larger solution size due to external RC network. | Choose TPS563201 when design flexibility (frequency adjustment, external compensation) outweighs simplicity; NCP1593BMNTWG offers faster time-to-market with internal compensation. |
Compared with MP2315DJ-LF-Z and TPS563201, the NCP1593BMNTWG delivers best-in-class integration for 1 MHz, 3 A applications - combining internal compensation, hiccup protection, pre-bias startup, and PG signaling in a thermally optimized DFN10 package without requiring layout changes or additional components.
Availability
NCP1593BMNTWG is available at Aetrix Electronics and suitable for set-top box power supplies, LCD TV core voltage rails, and USB modem baseband regulation requiring stable component supply, Pb-free compliance, and long-term industrial availability.
Supply support for NCP1593BMNTWG 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, and sensor solutions for automotive, industrial, and consumer markets.
The NCP1593BMNTWG belongs to onsemi's high-integration DC-DC converter product line, designed specifically for space-constrained, high-reliability consumer electronics demanding robust protection, minimal external components, and seamless power sequencing.
FAQ
What is the maximum continuous output current of the NCP1593BMNTWG?
The NCP1593BMNTWG delivers up to 3 A of continuous output current under typical thermal conditions (TA ≤ +70 °C, 1 in² copper pour, 2-layer PCB). This rating relies on its integrated 90 mΩ P-MOSFET and 60 mΩ N-MOSFET, DFN10 package thermal performance (RJA = 68 °C/W), and internal thermal shutdown at 185 °C. Derating is required above +70 °C ambient or with reduced copper area.
Does the NCP1593BMNTWG support adjustable switching frequency?
No, the NCP1593BMNTWG features a fixed 1 MHz switching frequency with ±13% tolerance over temperature and process variation. This fixed frequency simplifies EMI filter design and eliminates need for external frequency-setting components. For variable-frequency operation, consider alternatives like the TPS563201, but note that NCP1593BMNTWG prioritizes integration and ease-of-use over frequency flexibility.
How does the NCP1593BMNTWG handle short-circuit conditions?
The NCP1593BMNTWG responds to short-circuit events using hiccup-mode protection: after seven consecutive overcurrent cycles, it disables both MOSFETs, discharges the compensation network, waits ~2 ms (4×tSS), then attempts soft-start again. This limits average power dissipation and enables automatic recovery upon fault removal - unlike latch-off protection, which requires external reset.
Can the NCP1593BMNTWG start up with a pre-charged output capacitor?
Yes, the NCP1593BMNTWG supports pre-biased startup: it holds off switching until the internal soft-start ramp voltage exceeds the voltage present on the FB pin. This prevents output voltage collapse or reverse current flow when powering into an already charged output rail - essential for systems with standby power supplies or residual capacitor charge.
What is the function of Pin 7 (SS/NC) on the NCP1593BMNTWG?
Pin 7 is a no-connect (NC) terminal for the NCP1593BMNTWG and must be left floating. This differs from the NCP1593AMNTWG, where Pin 7 serves as the Soft-Start (SS) input. Confusing these variants may lead to incorrect soft-start configuration; always verify marking "1593B" on the DFN10 package and consult the specific variant datasheet before layout.
NCP1593BMNTWG 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, Wettable Flank
- Supplier Device Package:
- 10-DFN (3x3)
NCP1593BMNTWG FAQ
1.How can I place an order for NCP1593BMNTWG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1593BMNTWG 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 NCP1593BMNTWG reliable?
The price and inventory of NCP1593BMNTWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1593BMNTWG is usually 5 days.
3.What payment methods are accepted for NCP1593BMNTWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1593BMNTWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1593BMNTWG?
NCP1593BMNTWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1593BMNTWG 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 NCP1593BMNTWG?
For technical support, including NCP1593BMNTWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1593BMNTWG requirements.
6.How does Aetrix verify that NCP1593BMNTWG is sourced from the original manufacturer or authorized distributors?
All NCP1593BMNTWG 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 NCP1593BMNTWG meets industry standards.
7.What is the process for return or replacement of NCP1593BMNTWG?
All NCP1593BMNTWG units undergo pre-shipment inspection (PSI). If there is an issue with NCP1593BMNTWG, 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 NCP1593BMNTWG part is unused and in its original packaging.
Return procedure for NCP1593BMNTWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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