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onsemi NCP4632DDT08T5G
- Part No.:
- NCP4632DDT08T5G
- Manufacturer:
- onsemi
- Package:
- TO-252-6, DPAK (5 Leads + Tab)
- Datasheet:
-
NCP4632DDT08T5G.pdf
- Description:
- IC REG LINEAR 0.8V 3A DPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,873
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Product details
Overview
NCP4632DDT08T5G from onsemi is a 3 A, low-dropout linear voltage regulator with fixed 0.8 V output, reverse current protection, and active discharge functionality. It operates from 1.6 V to 5.25 V input, delivers ±1% output accuracy, maintains 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 NCP4632DDT08T5G datasheet, pinout, applications, or equivalent options, key selection criteria include its DPAK-5 package thermal performance (RJA = 53 °C/W), 0.8 V fixed output with soft-start, reverse current limit (<10 µA), and CE-controlled enable/disable timing verified across load steps up to 3 A.
Technical Context
The NCP4632DDT08T5G integrates a CMOS pass transistor with reverse current detection circuitry that disables the output power device when VOUT exceeds VIN by <30 mV, limiting reverse leakage to <10 µA. Its internal reference is trimmed to ±1% over −40°C to +85°C, and line regulation is 0.15%/V typical.
Unlike non-discharge variants (e.g., NCP4632BDT08T5G), the "D" suffix denotes an integrated N-channel discharge transistor between VOUT and GND, activated during disable to rapidly deplete output capacitance-verified in Figure 32 with 1–100 mA load-dependent turn-off times under 2 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±1% at TJ = −40°C to +85°C; enables direct core supply for low-voltage processors and FPGAs. |
| Max Output Current | 3 A continuous; supports high-current digital loads without external current boosting. |
| Dropout Voltage | 510 mV typical at 3 A, VOUT = 2.5 V; allows operation with minimal headroom (e.g., 1.31 V input for 0.8 V output). |
| Quiescent Current | 350 µA typical in operation; minimizes standby drain in always-on battery systems. |
| Standby Current | 1 µA at VCE = 0 V; ensures ultra-low leakage during system sleep modes. |
| Reverse Current Limit | <10 µA when VOUT > VIN; prevents backfeed into upstream sources during hot-swap or multi-rail sequencing. |
| PSRR | 55 dB at 1 kHz, 300 mA load; suppresses ripple from noisy DC/DC pre-regulators feeding sensitive analog circuits. |
Pinout & Package
Package: DPAK-5 (TO-252-5), Pb-free, with exposed thermal pad internally connected to Pin 3 (GND). Thermal resistance RJA = 53 °C/W on JEDEC 4-layer FR4 board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable Input | Active-high logic control; VCEH = 1.0 V min, VCEL = 0.4 V max; internal 300 nA pull-down allows direct tie-to-VIN if unused. |
| 2 - VIN | Input Voltage Supply | Accepts 1.6–5.25 V; requires 10 µF ceramic decoupling placed adjacent to pin for transient stability. |
| 3 - GND | Ground Reference | Common return for input, output, and CE; thermally tied to exposed pad for heat dissipation. |
| 4 - VOUT | Regulated Output | Delivers fixed 0.8 V; connects to 10 µF ceramic output capacitor near pin to maintain loop stability. |
| 5 - SENSE | Feedback Sense Input | Monitors output voltage for regulation; shorted to VOUT internally in fixed-voltage variants like NCP4632DDT08T5G. |
Key Features
| Feature | Design Value |
|---|---|
| Active Discharge Circuit | Integrated N-ch transistor discharges VOUT to GND during CE disable, reducing output decay time vs. passive RC decay-critical for fast power-state transitions. |
| Reverse Current Protection | Detects VOUT > VIN + 30 mV and shuts off pass device, limiting reverse leakage to <10 µA-prevents backfeeding in multi-source systems. |
| Soft-Start | Internal circuit limits inrush current during power-up, preventing input rail sag and avoiding false triggering of upstream undervoltage lockout. |
| Ceramic Capacitor Stability | Stable with ≥10 µF X5R/X7R ceramic output capacitors; eliminates need for higher-ESR tantalum or electrolytic caps. |
| Thermal Shutdown | Protects against sustained overload; device latches off until junction cools below 125°C threshold and CE is toggled. |
Applications
| Mobile Baseband Processors | Wearable Sensor Hubs |
|---|---|
Use Scenario: Powering ARM Cortex-A series application processors requiring tightly regulated 0.8 V core voltage during DVFS transitions. IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise 0.8 V rail with fast load transient response (Figure 29 shows <1.4 ms recovery from 1 mA → 3 A step). Use Value: Enables reliable operation at sub-1 V core voltages while maintaining ±1% accuracy across temperature and line variations-reducing margining overhead in SoC power design. | Use Scenario: Supplying ultra-low-power inertial measurement units (IMUs) and environmental sensors in hearables and smartwatches. IC Role / Device Role / Timing Role: Always-on LDO providing 0.8 V bias with 1 µA standby current, enabling multi-week battery life in sleep mode. Use Value: Quiescent current of 350 µA (typ) and 1 µA (standby) directly extends runtime versus higher-IQ alternatives-validated in Figures 7–10 across 1.6–5.25 V input range. |
| USB-Powered Peripherals | Industrial IoT Edge Nodes |
Use Scenario: Regulating 5 V USB input down to 0.8 V for microcontroller cores in portable test equipment and dongles. IC Role / Device Role / Timing Role: Input-stage LDO with reverse current protection, preventing backfeed into USB host during cable disconnect or host power loss. Use Value: Reverse current limit <10 µA eliminates need for external blocking diode-reducing BOM count and forward voltage drop losses. | Use Scenario: Providing isolated 0.8 V supply for FPGA configuration logic in remote monitoring gateways operating in −40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-accuracy, thermally robust LDO with RJA = 53 °C/W on standard PCB, supporting 3 A loads without heatsink. Use Value: ±1% output accuracy maintained over full industrial temperature range reduces calibration frequency and improves long-term sensor data integrity. |
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 |
|---|---|---|---|
| NCP4632BDT08T5G | No active discharge transistor; slower VOUT decay during disable (Figure 31 vs. Figure 32); same pinout, marking, and electrical specs otherwise. | Suitable where fast output discharge is unnecessary (e.g., non-sequenced rails), but not for systems requiring rapid power-state transitions. | Select NCP4632BDT08T5G only if active discharge adds no value-reduces cost slightly but forfeits controlled shutdown behavior. |
| TPL7407LDR | 7-channel 500 mA sink driver with integrated LDO-like regulation; not a standalone 3 A LDO-requires external pass element for high-current use. | Targeted at LED/relay driving with local regulation, not single-rail high-current core supply. | Not a functional replacement; consider only for multi-load distributed regulation where channel count outweighs current per rail. |
Compared with NCP4632BDT08T5G, the NCP4632DDT08T5G adds active discharge for faster power-down control without altering footprint or basic regulation specs; TPL7407LDR serves a fundamentally different multi-channel driver role and cannot replace the 3 A single-rail capability of the NCP4632DDT08T5G.
Availability
NCP4632DDT08T5G is available at Aetrix Electronics and suitable for battery-powered portable electronics, wearable sensor hubs, and USB-powered peripherals requiring stable component supply with guaranteed long-term manufacturability.
Supply support for NCP4632DDT08T5G 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 consumer markets.
The NCP4632DDT08T5G belongs to onsemi's high-current LDO family designed specifically for low-voltage, high-accuracy power delivery in space-constrained portable and battery-operated systems.
FAQ
What is the maximum input voltage rating for the NCP4632DDT08T5G?
The absolute maximum input voltage for the NCP4632DDT08T5G is 6.0 V per Absolute Maximum Ratings. However, the recommended operating input voltage range is 1.6 V to 5.25 V. Operation above 5.25 V is permitted only up to 5.5 V for ≤500 hours total lifetime, as specified in Note 4 of the Electrical Characteristics table.
Does the NCP4632DDT08T5G require external compensation components?
No, the NCP4632DDT08T5G is internally compensated and stable with standard 10 µF ceramic output capacitors. The datasheet explicitly states it is "Stable with Ceramic Capacitors" and provides layout guidance-no external resistors or capacitors are needed for loop stability.
How does the reverse current protection function in the NCP4632DDT08T5G?
The NCP4632DDT08T5G monitors the voltage difference between VOUT and VIN. When VOUT exceeds VIN by more than ~30 mV, the reverse detector disables the pass transistor, limiting reverse current to <10 µA flowing to GND. A 5 mV hysteresis prevents oscillation during marginal conditions, requiring VIN to rise >35 mV above VOUT before re-enabling.
What is the thermal performance of the NCP4632DDT08T5G in its DPAK-5 package?
The NCP4632DDT08T5G 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 PCB. This value assumes proper thermal pad soldering and adequate copper area-actual performance depends on PCB layout, ambient temperature, and airflow.
Can the NCP4632DDT08T5G be used with input voltages below 1.6 V?
No-the specified minimum operating input voltage for the NCP4632DDT08T5G is 1.6 V. Below this, regulation is not guaranteed: dropout voltage rises sharply, output accuracy degrades, and the device may fail to start or sustain 3 A output. The 0.8 V output requires sufficient headroom-e.g., ≥1.31 V input for 510 mV dropout at full load.
NCP4632DDT08T5G 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)
NCP4632DDT08T5G FAQ
1.How can I place an order for NCP4632DDT08T5G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4632DDT08T5G 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 NCP4632DDT08T5G reliable?
The price and inventory of NCP4632DDT08T5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4632DDT08T5G is usually 5 days.
3.What payment methods are accepted for NCP4632DDT08T5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4632DDT08T5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4632DDT08T5G?
NCP4632DDT08T5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4632DDT08T5G 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 NCP4632DDT08T5G?
For technical support, including NCP4632DDT08T5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4632DDT08T5G requirements.
6.How does Aetrix verify that NCP4632DDT08T5G is sourced from the original manufacturer or authorized distributors?
All NCP4632DDT08T5G 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 NCP4632DDT08T5G meets industry standards.
7.What is the process for return or replacement of NCP4632DDT08T5G?
All NCP4632DDT08T5G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4632DDT08T5G, 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 NCP4632DDT08T5G part is unused and in its original packaging.
Return procedure for NCP4632DDT08T5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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