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onsemi NCP4632BDT08T5G
- Part No.:
- NCP4632BDT08T5G
- Manufacturer:
- onsemi
- Package:
- TO-252-6, DPAK (5 Leads + Tab)
- Datasheet:
-
NCP4632BDT08T5G.pdf
- Description:
- IC REG LINEAR 0.8V 3A DPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,074
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Product details
Overview
NCP4632BDT08T5G from onsemi is a 3 A, low-dropout linear voltage regulator with fixed 0.8 V output, reverse current protection, and ±1% output voltage accuracy. It operates from 1.6 V to 5.25 V input, delivers 510 mV typical dropout at 3 A, and draws only 350 µA quiescent current-ideal for battery-powered portable electronics requiring stable low-voltage rail generation.
For engineers reviewing the NCP4632BDT08T5G datasheet, pinout, applications, or equivalent options, key selection considerations include its DPAK-5 package thermal performance (RJA = 53 °C/W), absence of active output discharge (B-suffix), ceramic capacitor stability, and precise 0.8 V reference for core logic or SoC power domains.
Technical Context
The NCP4632BDT08T5G integrates a CMOS pass element with reverse current detection that disables the output when VOUT exceeds VIN by >30 mV, limiting reverse leakage to <10 µA. Its internal 0.8 V reference feeds a precision error amplifier enabling ±1% output accuracy across −40°C to +85°C and load currents up to 3 A.
Soft-start circuitry controls inrush current during enable, while thermal shutdown and current foldback (220 mA typical) protect against overload. The CE pin accepts TTL-compatible logic thresholds (VCEH = 1.0 V, VCEL = 0.4 V) and features an internal 300 nA pull-down for default-off operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±1% - ensures stable core voltage for low-power microcontrollers and FPGAs. |
| Max Output Current | 3 A continuous - supports high-current digital loads without external pass devices. |
| Dropout Voltage | 510 mV typ. at 3 A, 2.5 V out - enables regulation from 1.31 V input, critical for single-cell Li-ion systems. |
| Quiescent Current | 350 µA typ. - minimizes standby drain in always-on battery applications. |
| Input Voltage Range | 1.6 V to 5.25 V - compatible with Li-ion, Li-poly, and regulated 3.3 V/5 V rails. |
| Line Regulation | 0.15%/V typ. - maintains tight output under varying input conditions, e.g., battery discharge. |
| PSRR | 55 dB at 1 kHz - suppresses ripple from noisy switcher outputs feeding the LDO input. |
| Thermal Resistance | RJA = 53 °C/W (JEDEC 4-layer board) - defines maximum power dissipation before thermal shutdown. |
Pinout & Package
The NCP4632BDT08T5G is housed in a Pb-free DPAK-5 (TO-252-5) package with exposed thermal pad internally connected to Pin 3 (GND). The 5-pin configuration supports high-current routing and efficient heat transfer to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable | Active-high logic input; internal 300 nA pull-down ensures safe default-off state when unconnected. |
| 2 - VIN | Input Voltage | Primary power input; requires 10 µF ceramic decoupling placed adjacent to pin for transient stability. |
| 3 - GND | Ground Reference | Common return path for input/output/enable; thermal pad tied internally for heatsinking. |
| 4 - VOUT | Regulated Output | Delivers fixed 0.8 V; connects directly to load with 10 µF ceramic output capacitor for loop stability. |
| 5 - SENSE | Voltage Sense | Feedback node for fixed-output variants; ties to VOUT internally-no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse Current Protection | Blocks >30 mV VOUT–VIN differential, limiting reverse leakage to <10 µA-prevents backfeeding into source during hot-swap or battery removal. |
| Stable with Ceramic Capacitors | Eliminates need for high-ESR tantalum or aluminum electrolytics-reduces BOM cost and improves reliability in space-constrained designs. |
| Soft-Start Circuitry | Controls output ramp rate during enable, preventing inrush current spikes that could trip upstream current limits or cause supply droop. |
| ±1% Output Accuracy | Guaranteed over temperature and line/load-enables direct powering of voltage-sensitive cores without external trimming. |
| Low Quiescent Current | 350 µA operating / 1 µA standby-extends battery life in IoT sensors and wearables operating in deep-sleep modes. |
Applications
| Battery-Powered Portable Devices | Low-Voltage Microcontroller Core Supply |
|---|---|
Use Scenario: Powering ARM Cortex-M series MCUs in handheld medical monitors with single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary 0.8 V core LDO delivering clean, regulated voltage to CPU VDDCORE pins. Use Value: Enables full-speed MCU operation down to 1.31 V input (0.8 V + 510 mV dropout), extending usable battery range by ~15% versus higher-dropout alternatives. | Use Scenario: Supplying FPGA configurable logic blocks (CLBs) requiring tightly regulated 0.8 V rail in edge AI inference modules. IC Role / Device Role / Timing Role: Low-noise, high-accuracy voltage source ensuring timing margin integrity across process/voltage/temperature corners. Use Value: ±1% output accuracy and 55 dB PSRR suppress input ripple and noise, preventing setup/hold violations in high-speed logic paths. |
| Camera Image Sensor Biasing | USB-Powered Peripheral Power Management |
Use Scenario: Providing bias voltage to CMOS image sensor analog front-end (AFE) in compact action cameras. IC Role / Device Role / Timing Role: Low-noise 0.8 V supply for sensor pixel readout circuitry, minimizing dark current and fixed-pattern noise. Use Value: 60 µVRMS output noise (10 Hz–100 kHz) preserves signal-to-noise ratio in low-light imaging without added filtering. | Use Scenario: Regulating 5 V USB input to 0.8 V for USB-C powered smart accessories with embedded BLE radios. IC Role / Device Role / Timing Role: Input-stage LDO isolating sensitive RF circuits from USB port voltage fluctuations and EMI. Use Value: Reverse current protection prevents accessory from back-driving host USB port during disconnect events, meeting USB compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0508PDBVR | Lower IQ (25 µA), lower max IOUT (200 mA), same 0.8 V fixed output, SOT-23-5 package. | Not suitable for >300 mA loads; limited thermal capability vs. DPAK-5. | Select for ultra-low-power sensor nodes where 3 A capability is unnecessary and board space is constrained. |
| NCP4632DDT08T5G | Identical specs except includes active output discharge transistor (D-suffix); turns off VOUT faster during disable. | Required where rapid output discharge prevents latch-up or meets system-level power sequencing timing. | Choose when fast turn-off (<1 ms) is mandatory; NCP4632BDT08T5G lacks this function. |
Compared with TPS7A0508PDBVR, the NCP4632BDT08T5G delivers 15× higher output current and superior thermal handling but consumes more quiescent current; compared with NCP4632DDT08T5G, it omits active discharge-simplifying design where slow decay is acceptable and reducing component count.
Availability
NCP4632BDT08T5G is available at Aetrix Electronics and suitable for battery-powered portable devices, low-voltage microcontroller core supplies, camera image sensor biasing, and USB-powered peripheral power management requiring stable component supply across production lifecycles.
Supply support for NCP4632BDT08T5G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
The NCP4632BDT08T5G belongs to onsemi's high-current LDO family designed specifically for low-voltage, high-efficiency power delivery in portable and battery-critical systems where precision, low dropout, and reverse protection are essential.
FAQ
What is the maximum input voltage rating for the NCP4632BDT08T5G?
The absolute maximum input voltage for the NCP4632BDT08T5G is 6.0 V per the Absolute Maximum Ratings table. However, the recommended operating input voltage range is 1.6 V to 5.25 V. Operation above 5.25 V is only permitted for ≤500 hours total lifetime and must not exceed 5.5 V-exceeding these limits risks device damage or degraded reliability. Always verify actual system input transients remain within spec for NCP4632BDT08T5G.
Does the NCP4632BDT08T5G require external resistors to set the output voltage?
No, the NCP4632BDT08T5G is a fixed-output variant with factory-trimmed 0.8 V regulation-no external resistors are needed. Its SENSE pin is internally connected to VOUT and serves only as feedback for the internal error amplifier. External resistor dividers apply only to the adjustable version (e.g., NCP4632DDTADJT5G), not the NCP4632BDT08T5G.
How does reverse current protection work in the NCP4632BDT08T5G?
The NCP4632BDT08T5G monitors the voltage difference between VOUT and VIN. When VOUT exceeds VIN by more than 30 mV, the internal reverse detector disables the pass transistor, blocking reverse current flow. Leakage is limited to <10 µA to GND. A 5 mV hysteresis (35 mV turn-on threshold) prevents oscillation near the trip point. This behavior is intrinsic to the NCP4632BDT08T5G and requires no external components.
Can the NCP4632BDT08T5G be used with ceramic output capacitors?
Yes, the NCP4632BDT08T5G is explicitly characterized and guaranteed stable with 10 µF ceramic output capacitors, as confirmed in the datasheet's "Stable with Ceramic Capacitors" feature and Figure 38 application schematic. Using low-ESR ceramics eliminates the need for bulkier, less reliable tantalum or aluminum electrolytics-reducing size, cost, and failure risk in the NCP4632BDT08T5G design.
What is the thermal performance of the NCP4632BDT08T5G in its DPAK-5 package?
The NCP4632BDT08T5G has a junction-to-air thermal resistance (RJA) of 53 °C/W when mounted on a JEDEC-standard 76.2 mm × 114.3 mm, 4-layer FR4 board. This value assumes optimal PCB copper area under the thermal pad. For a 3 A load with 510 mV dropout (1.53 W dissipation), junction temperature rise above ambient is ~81°C-so ambient must stay below 44°C to maintain TJ ≤ 125°C. Thermal design is critical for sustained NCP4632BDT08T5G operation.
NCP4632BDT08T5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-6, DPAK (5 Leads + Tab)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.11V @ 3A
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 450 µA
- Current - Supply (Max):
- -
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Soft Start
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252 (DPAK)
NCP4632BDT08T5G FAQ
1.How can I place an order for NCP4632BDT08T5G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4632BDT08T5G 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 NCP4632BDT08T5G reliable?
The price and inventory of NCP4632BDT08T5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4632BDT08T5G is usually 5 days.
3.What payment methods are accepted for NCP4632BDT08T5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4632BDT08T5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4632BDT08T5G?
NCP4632BDT08T5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4632BDT08T5G 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 NCP4632BDT08T5G?
For technical support, including NCP4632BDT08T5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4632BDT08T5G requirements.
6.How does Aetrix verify that NCP4632BDT08T5G is sourced from the original manufacturer or authorized distributors?
All NCP4632BDT08T5G 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 NCP4632BDT08T5G meets industry standards.
7.What is the process for return or replacement of NCP4632BDT08T5G?
All NCP4632BDT08T5G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4632BDT08T5G, 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 NCP4632BDT08T5G part is unused and in its original packaging.
Return procedure for NCP4632BDT08T5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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