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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

onsemi NCV33163P

Name: NCV33163P
Brand: onsemi
SKU: NCV33163P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCV33163P

Manufacturer:: onsemi

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: NCV33163P.pdf

Description:: IC REG BUCK BST ADJ 2.5A 16PDIP

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Product details

Overview

NCV33163P from onsemi is a monolithic step-up/step-down/inverting switching regulator IC with integrated 2.5 A output switch, 2.5 V to 60 V input range, 45–60 kHz oscillator, precision 1.25 V feedback reference, and low-voltage indicator output for microprocessor reset signaling - used in automotive DC-DC power conversion where thermal robustness and minimal external components are required.

For engineers reviewing the NCV33163P datasheet, pinout, applications, or equivalent options, this page delivers verified functional identity, validated 16-pin DIP package mapping, confirmed thermal shutdown and cycle-by-cycle current limiting behavior, and real-world converter topology support (buck, boost, inverting) per onsemi's Rev. 5 datasheet.

Technical Context

The NCV33163P operates as a fixed on-time, variable off-time voltage-mode ripple regulator using an internal sawtooth oscillator (1.25 V peak / 0.55 V valley) with 9:1 charge/discharge current ratio. Its dual feedback comparators enable independent regulation of main output (via Pin 2, 1.25 V threshold) and LVI reset (via Pin 3, 1.125 V threshold with 15 mV hysteresis).

It integrates a bootstrap-capable driver stage supporting both saturated and Darlington switch configurations, with separate emitter/collector terminals (Pins 14–15 and 11–12) and cycle-by-cycle current limiting triggered at 250 mV across RSC. Thermal shutdown activates at ~170°C, forcing latch set and disabling the output switch.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5 V to 60 V - supports wide-input automotive and industrial supply rails without pre-regulation.
Output Switch Current	2.5 A peak - enables direct driving of buck/boost/inverting power stages up to ~3 A load with external boost.
Oscillator Frequency	45–60 kHz - programmable via CT capacitor; stable over temperature and line (±4% total variation).
Feedback Reference Voltage	1.25 V (FB2, Pin 2) - precision trimmed, ±2% over −40°C to +115°C; enables accurate output voltage setting.
LVI Threshold	1.125 V with 15 mV hysteresis - provides clean microprocessor reset signaling without external comparator.
Thermal Shutdown	~170°C junction - internal protection that forces latch set; requires external heatsinking via pins 4/5/12/13.
Standby Supply Current	6.0–10 mA - low quiescent draw suitable for always-on automotive modules.

Pinout & Package

The NCV33163P is housed in a 16-pin dual-in-line plastic package (Case 648C) with integral heat tab formed by pins 4, 5, 12, and 13 - soldered directly to PCB copper for enhanced thermal conduction (R_JC = 15°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 (LVI Output)	Open-collector reset signal	Sinks ≥6 mA; interfaces directly with µP reset input; active-low when V_FB2 < 1.125 V.
2 (Voltage Feedback 2)	Non-inverting input, 1.25 V ref	Main output voltage sense node; high-Z (±0.4 µA bias); sets regulated output via resistor divider.
3 (Voltage Feedback 1)	Non-inverting input, 5.05 V ref	Alternative feedback path for 5 V direct connection; Pin 2 must be grounded if unused.
4,5,12,13 (GND)	Ground / Heat Tab	Common ground return and primary thermal path; must be soldered to large copper area.
6 (Timing Capacitor)	Oscillator timing node	Connects to CT capacitor (e.g., 620 pF); sets f_OSC and t_ON; R_DT adds dead time.
7 (VCC)	Power supply input	Primary IC supply; accepts 2.5–60 V; powers internal circuitry and bootstrap source.
8 (Ipk Sense)	Current limit comparator input	Monitors voltage drop across R_SC; trips at 250 mV to initiate cycle-by-cycle shutdown.
9 (Bootstrap Input)	Driver bias boost node	Connected via RC network to switch emitter; raises internal 2 mA source above V_CC to reduce V_CE(sat).
10 (Switch Emitter)	Output switch emitter terminal	Externally accessible emitter; enables Darlington or saturated configuration; clamped to −2.0 V min.
11 (Switch Collector)	Output switch collector terminal	Main power switch output; rated for 60 V C-E; handles 2.5 A peak; connects to inductor/diode.
14 (Driver Collector)	Driver stage collector	Drives external NPN/PNP boost transistors when I_SW > 2.5 A; rated for 60 V, 150 mA.

Key Features

Feature	Design Value
Dual independent feedback comparators	One for main output regulation (1.25 V ref), one for LVI reset (1.125 V ref with hysteresis) - eliminates need for external reset IC.
Bootstrap-capable driver	Internal 2 mA current source with zener clamp (V_Z = V_CC + 7.0 V) reduces V_CE(sat) by ~40% in buck/inverting topologies.
Cycle-by-cycle current limiting	250 mV threshold on I_pk sense pin with <200 ns propagation delay - protects switch during overload or short-circuit.
Thermal shutdown with latch	Activates at ~170°C junction; forces output disable until power cycle - prevents catastrophic failure under sustained overtemp.
Heat-tab DIP-16 package	Pins 4/5/12/13 form thermally conductive ground plane; achieves R_JC = 15°C/W - enables 2.5 W dissipation at T_A = 70°C with 30 mm copper.

Applications

Automotive Body Control Module	Industrial Sensor Power Supply
Use Scenario: Generating stable 5 V or 3.3 V rail from 12 V battery in BCM units exposed to cold cranking (down to 2.5 V) and load dump (up to 60 V). IC Role / Device Role / Timing Role: Primary DC-DC controller implementing buck topology with integrated switch and LVI reset for MCU supervision. Use Value: Eliminates need for external reset IC and discrete switch; withstands automotive transients without derating; thermal design simplified via heat-tab DIP package.	Use Scenario: Providing isolated −12 V bias for analog sensor front-ends in factory automation equipment requiring noise immunity and wide input range. IC Role / Device Role / Timing Role: Inverting regulator controller with precise 1.25 V reference enabling accurate negative output setting via resistor divider. Use Value: Achieves 77.5% efficiency at 1.0 A with bootstrap; 130 mVpp output ripple meets industrial analog noise specs; LVI monitors input undervoltage.
Consumer Set-Top Box PSU	Telecom Line Card Bias Supply
Use Scenario: Stepping down 12 V adapter input to 5.05 V for SoC core logic in cost-sensitive STB designs with strict BOM count limits. IC Role / Device Role / Timing Role: Step-down regulator with direct 5 V feedback (Pin 3) and internal 5.05 V reference compensating for cable drop. Use Value: Reduces component count by 3–4 parts vs. controller+external MOSFET; 81.2% efficiency with bootstrap improves thermal margin in sealed enclosures.	Use Scenario: Generating +28 V from 12 V intermediate bus for telecom line interface circuits needing tight line/load regulation. IC Role / Device Role / Timing Role: Boost converter controller with cycle-by-cycle current limiting protecting against shorted line conditions. Use Value: Delivers 88.1% efficiency at 600 mA; ±0.05% line regulation meets GR-63-CORE requirements; thermal shutdown prevents field failures.

Automotive Body Control Module

Industrial Sensor Power Supply

Use Scenario: Generating stable 5 V or 3.3 V rail from 12 V battery in BCM units exposed to cold cranking (down to 2.5 V) and load dump (up to 60 V).

IC Role / Device Role / Timing Role: Primary DC-DC controller implementing buck topology with integrated switch and LVI reset for MCU supervision.

Use Value: Eliminates need for external reset IC and discrete switch; withstands automotive transients without derating; thermal design simplified via heat-tab DIP package.

Use Scenario: Providing isolated −12 V bias for analog sensor front-ends in factory automation equipment requiring noise immunity and wide input range.

IC Role / Device Role / Timing Role: Inverting regulator controller with precise 1.25 V reference enabling accurate negative output setting via resistor divider.

Use Value: Achieves 77.5% efficiency at 1.0 A with bootstrap; 130 mVpp output ripple meets industrial analog noise specs; LVI monitors input undervoltage.

Consumer Set-Top Box PSU

Telecom Line Card Bias Supply

Use Scenario: Stepping down 12 V adapter input to 5.05 V for SoC core logic in cost-sensitive STB designs with strict BOM count limits.

IC Role / Device Role / Timing Role: Step-down regulator with direct 5 V feedback (Pin 3) and internal 5.05 V reference compensating for cable drop.

Use Value: Reduces component count by 3–4 parts vs. controller+external MOSFET; 81.2% efficiency with bootstrap improves thermal margin in sealed enclosures.

Use Scenario: Generating +28 V from 12 V intermediate bus for telecom line interface circuits needing tight line/load regulation.

IC Role / Device Role / Timing Role: Boost converter controller with cycle-by-cycle current limiting protecting against shorted line conditions.

Use Value: Delivers 88.1% efficiency at 600 mA; ±0.05% line regulation meets GR-63-CORE requirements; thermal shutdown prevents field failures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar switching regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2596HV	Fixed 150 kHz frequency, 3 A switch, no LVI output, no bootstrap driver, SO-8 package	Lacks integrated reset signaling and thermal-enhanced DIP package; requires external reset circuit and heatsink for >2 A loads	Select when higher switching frequency and smaller magnetics are prioritized over automotive-grade LVI and thermal performance.
UC3844B	Current-mode PWM controller (no integrated switch), 250 kHz max, SO-8, requires external MOSFET and gate driver	Higher design flexibility but increases BOM count and layout complexity; no built-in current sense amplifier or LVI	Select when custom switch selection, higher efficiency at light load, or adjustable frequency is required - not a drop-in replacement.

Compared with LM2596HV and UC3844B, the NCV33163P uniquely integrates LVI reset, bootstrap drive, and heat-tab DIP packaging - delivering lower system-level component count and superior thermal reliability in automotive and industrial DC-DC applications without sacrificing 2.5 A capability.

Availability

NCV33163P is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor power supplies, consumer set-top box PSUs, and telecom line card bias supplies requiring stable component supply across extended temperature and voltage ranges.

Supply support for NCV33163P 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 cloud infrastructure markets.

The NCV33163P belongs to onsemi's automotive-grade monolithic switching regulator product line, designed specifically for robust DC-DC conversion in harsh environments - emphasizing thermal resilience, wide input range, and integrated system-level functions like LVI reset.

FAQ

What is the maximum output current capability of the NCV33163P?

The NCV33163P integrates a 2.5 A peak output switch. In standard configurations (buck/boost/inverting), it reliably delivers up to 3.0 A continuous output with proper heatsinking and bootstrap operation. For loads exceeding 2.5 A peak, external NPN or PNP transistors can be driven via Pin 14 (Driver Collector) and Pins 11/14/15, as shown in Figures 22–26 of the datasheet. The NCV33163P itself remains the control and protection core in such boosted arrangements.

Does the NCV33163P support both step-up and step-down topologies?

Yes, the NCV33163P is explicitly designed for step-up (boost), step-down (buck), and voltage-inverting applications - as confirmed in its device description, block diagram (Figure 19), and three fully tested reference circuits (Figures 21–25). Its architecture uses a fixed on-time, variable off-time control scheme compatible with all three topologies using appropriate external component selection (inductor, diode, feedback resistors).

How does the Low Voltage Indicator (LVI) function in the NCV33163P?

The LVI in the NCV33163P is implemented as a dedicated comparator (Pin 1) with an internal 1.125 V reference and 15 mV hysteresis. It monitors the voltage at Pin 3 (Voltage Feedback 1) and asserts an open-collector low signal when that voltage falls below the threshold - providing direct microprocessor reset signaling. No external components are needed for basic operation, though RLVI and CDLY can add programmable delay per Figure 21.

What package type and thermal characteristics define the NCV33163P?

The NCV33163P uses a 16-pin dual-in-line plastic package (Case 648C) with an integrated heat tab formed by pins 4, 5, 12, and 13. Its junction-to-case thermal resistance is 15°C/W, and junction-to-air is 80°C/W. Effective thermal performance requires soldering those four pins to ≥30 mm² of 2 oz copper - enabling up to 2.5 W dissipation at 70°C ambient, as shown in Figure 17 of the datasheet.

Can the NCV33163P operate from a 3.3 V input supply?

Yes - the NCV33163P guarantees parametric operation from 2.5 V to 60 V. At inputs below 3.0 V, the datasheet specifies connecting the Bootstrap Input (Pin 9) directly to VCC instead of the standard emitter-coupled RC network. Figure 16 confirms functional operation down to 1.7 V at room temperature, making it suitable for brown-out recovery and low-voltage battery systems.

NCV33163P Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: 16-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Function:: Step-Up, Step-Down

Output Configuration:: Positive or Negative

Topology:: Buck, Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.5V

Voltage - Input (Max):: 60V

Voltage - Output (Min/Fixed):: 1.25V

Voltage - Output (Max):: 40V

Current - Output:: 2.5A (Switch)

Frequency - Switching:: 55kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 115°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-PDIP

NCV33163P FAQ

1.How can I place an order for NCV33163P through Aetrix?

Please submit a Request for Quotation (RFQ) for NCV33163P 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 NCV33163P reliable?

The price and inventory of NCV33163P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV33163P is usually 5 days.

3.What payment methods are accepted for NCV33163P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV33163P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCV33163P?

NCV33163P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCV33163P 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 NCV33163P?

For technical support, including NCV33163P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV33163P requirements.

6.How does Aetrix verify that NCV33163P is sourced from the original manufacturer or authorized distributors?

All NCV33163P 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 NCV33163P meets industry standards.

7.What is the process for return or replacement of NCV33163P?

All NCV33163P units undergo pre-shipment inspection (PSI). If there is an issue with NCV33163P, 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 NCV33163P part is unused and in its original packaging.

Return procedure for NCV33163P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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