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onsemi NCP6332CMTAATBG
- Part No.:
- NCP6332CMTAATBG
- Manufacturer:
- onsemi
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
NCP6332CMTAATBG.pdf
- Description:
- IC REG BUCK ADJ 1.2A 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,042
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Product details
Overview
NCP6332CMTAATBG from onsemi is a 3 MHz, 1.2 A synchronous buck converter optimized for portable applications powered by single-cell Li-ion or triple-cell alkaline/NiCd/NiMH batteries. It delivers adjustable output voltage (0.6 V to VIN), features synchronous rectification, automatic PWM/PFM mode switching, and operates in a space-saving 2.0 × 2.0 × 0.75 mm WDFN-8 package with exposed thermal pad.
For engineers reviewing the NCP6332CMTAATBG datasheet, pinout, applications, or equivalent options, key selection considerations include its 3 MHz switching frequency enabling compact filter design, MODE pin-controlled forced-PWM vs. auto PFM operation, integrated high-side/low-side MOSFETs (RON_H = 140 mΩ typ @ 3.6 V), active output discharge, and thermal shutdown at 150°C.
Technical Context
The NCP6332CMTAATBG implements voltage-mode control with input supply voltage feedforward to maintain regulation across its 2.3–5.5 V input range. Its 3 MHz fixed-frequency PWM operation ensures predictable EMI behavior during medium-to-heavy loads, while adaptive PFM mode reduces quiescent current to 5 mA (typ) under light load.
Operation mode is externally selected via the MODE pin: >1.1 V forces continuous PWM; <0.4 V enables automatic PFM/PWM transition. Cycle-by-cycle current limiting (ILIM = 1.9 A typ) and thermal shutdown (150°C threshold, 25°C hysteresis) provide robust protection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V - supports direct connection to single-cell Li-ion (2.7–4.2 V) or triple-cell alkaline (3.0–4.5 V) without pre-regulation. |
| Output Current | Up to 1.2 A - sufficient for powering core logic, RF transceivers, or display drivers in handheld devices. |
| Switching Frequency | 3.0 MHz (±0.3 MHz) - enables use of ≤1.0 µH inductors and 10 µF ceramic output capacitors, reducing solution footprint by >40% vs. 1 MHz converters. |
| FB Reference Voltage | 600 mV (±6 mV) - sets output voltage via external resistor divider; allows precise adjustment from 0.6 V to VIN with <±0.5%/A load regulation. |
| Quiescent Current | 5 mA (typ, forced PWM) / 30 µA (typ, PFM) - extends battery life in always-on subsystems like real-time clocks or sensor interfaces. |
| Thermal Shutdown | 150°C activation with 25°C hysteresis - prevents irreversible die damage during sustained overload or poor PCB thermal design. |
| Enable Threshold | VEN_H = 1.1 V, VEN_L = 0.4 V - compatible with standard GPIO outputs and supports clean power sequencing with 270 mV hysteresis. |
Pinout & Package
The NCP6332CMTAATBG is housed in a thermally enhanced WDFN-8 (2.0 × 2.0 × 0.75 mm, 0.5 mm pitch) package with an exposed thermal pad (Pin 9) requiring solder connection to PCB ground for optimal power dissipation. Package conforms to Case 511BE and is Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGND | Power Ground | Primary return path for high-current switch node; must be low-inductance connection to system ground plane. |
| 2 - SW | Switch Node | Drives one end of external inductor; experiences full VIN-to-GND voltage swing at 3 MHz; requires tight layout to minimize EMI. |
| 3 - AGND | Analog Ground | Reference for feedback, error amplifier, and internal bias circuits; should be connected to system ground at single point near exposed pad. |
| 4 - FB | Feedback Input | Senses output voltage via resistor divider; 600 mV reference enables accurate regulation; sensitive to noise-requires guard ring and short trace. |
| 5 - EN | Enable Input | Active-high digital control; 10 nA internal pull-down allows direct microcontroller GPIO drive without external resistor. |
| 6 - MODE | Mode Selection | Digital input controlling PWM/PFM behavior: high = forced PWM (constant frequency), low = auto PFM/PWM (ultra-low IQ). |
| 7 - AVIN | Analog Supply | Bias supply for internal analog circuitry; requires local 1 µF ceramic bypass capacitor placed adjacent to pin. |
| 8 - PVIN | Power Input | Main power rail input; handles peak switch currents; requires ≥10 µF ceramic capacitor with low ESL, placed within 2 mm of pin. |
| 9 - PAD | Exposed Thermal Pad | Internally unconnected but critical for thermal performance; must be soldered to solid copper ground plane with ≥4 thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated high-side P-MOSFET (140 mΩ) + low-side N-MOSFET (110 mΩ) eliminates external diode, improving efficiency by 8–12% at 1 A vs. asynchronous designs. |
| Automatic PWM/PFM Transition | Seamless mode switching at ~200 mA load threshold maintains >85% efficiency from 10 mA to 1.2 A without external control logic. |
| Active Output Discharge | Internal 500 Ω (typ) discharge path from SW to PGND pulls output to ground within 100 µs after disable, preventing floating voltage in multi-rail systems. |
| Soft-Start | Fixed 400 µs (typ) output ramp time limits inrush current during enable, eliminating need for external soft-start circuitry. |
| Overcurrent Protection | Cycle-by-cycle current limit (1.9 A typ) responds within one switching cycle (<333 ns at 3 MHz), protecting MOSFETs during short-circuit or overload events. |
Applications
| Cellular Baseband Power | USB-Powered Peripheral |
|---|---|
Use Scenario: Supplies 1.2 V core voltage to application processor in smartphone during active data transmission. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1.2 A at 3 MHz with minimal output ripple (<25 mV pk-pk in PWM mode). Use Value: Enables use of ultra-small 1.0 µH inductor and 10 µF ceramic capacitor, reducing total BOM area by 30% vs. lower-frequency alternatives. | Use Scenario: Powers Wi-Fi module in USB-powered dongle drawing 800 mA peak from 5 V USB bus. IC Role / Device Role / Timing Role: Step-down regulator converting 5 V USB input to 3.3 V I/O supply with automatic PFM mode extending battery-less operation time. Use Value: Achieves 92% efficiency at 100 mA (PFM) and 94% at 800 mA (PWM), minimizing heat buildup in sealed plastic enclosure. |
| Digital Camera Sensor Bias | Portable Media Player Audio Codec |
Use Scenario: Generates clean 2.8 V bias for CMOS image sensor in compact digital camera. IC Role / Device Role / Timing Role: Low-noise buck converter with 600 mV FB reference and tight line/load regulation (±0.5%/A) ensuring stable sensor performance. Use Value: 3 MHz operation avoids audible switching noise in image capture path; <4 mV output ripple preserves SNR in analog pixel readout. | Use Scenario: Supplies 1.8 V digital core and 3.3 V analog supply to audio codec in MP3 player running from 3.6 V Li-ion battery. IC Role / Device Role / Timing Role: Dual-output capable via separate FB networks; MODE pin allows forced PWM during playback for lowest noise, PFM during pause for longest standby. Use Value: Single IC replaces two discrete regulators, saving 22 mm² PCB area and simplifying BOM management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 2.25 MHz switching, 0.6 V FB, 1.2 A rating, but lacks active output discharge and has higher RDS(on) (220/180 mΩ). | Lower efficiency at light load due to no PFM mode; unsuitable where fast output discharge is required for system safety. | Select when cost sensitivity outweighs need for ultra-low IQ or active discharge; verify thermal margin with RDS(on) increase. |
| RT8059GJ6F | 3 MHz, 1.5 A, 0.6 V FB, includes power good output but no MODE pin-uses internal auto-PWM/PFM only. | Cannot force PWM mode externally; lacks dedicated MODE control for deterministic noise management in audio-sensitive designs. | Prefer when power-good monitoring is essential and fixed PFM behavior is acceptable; avoid where external PWM forcing is needed for EMI compliance. |
Compared with TPS62231DRYR and RT8059GJ6F, the NCP6332CMTAATBG uniquely combines 3 MHz operation, external MODE control for deterministic PWM forcing, active output discharge, and industry-leading 5 µA PFM quiescent current-making it optimal for space-constrained, battery-powered systems requiring both efficiency and controllable EMI.
Availability
NCP6332CMTAATBG is available at Aetrix Electronics and suitable for cellular baseband power, USB-powered peripherals, digital camera sensor bias, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for NCP6332CMTAATBG 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 power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, medical, and consumer markets.
The NCP6332CMTAATBG belongs to onsemi's high-frequency DC-DC converter product line, designed specifically for portable electronics requiring compact, high-efficiency power conversion with minimal external components and robust protection features.
FAQ
What is the recommended input capacitor for NCP6332CMTAATBG?
The NCP6332CMTAATBG requires a minimum 10 µF ceramic input capacitor placed within 2 mm of the PVIN and PGND pins to suppress high-frequency switching noise and limit input voltage ripple. A 10 µF, 6.3 V X5R MLCC in 0603 or 0805 case size-such as Murata GRM188R60J106ME47-is validated for stable operation across the full 2.3–5.5 V input range and 1.2 A load. Larger values (e.g., 22 µF) improve transient response but are not mandatory.
Does NCP6332CMTAATBG support adjustable output voltage?
Yes, the NCP6332CMTAATBG supports fully adjustable output voltage from 0.6 V to VIN using an external resistor divider connected between VOUT, FB, and AGND. The internal 600 mV feedback reference enables precise programming-for example, 1.8 V output uses R1 = 220 kΩ and R2 = 110 kΩ. A 15 pF feedforward capacitor (Cfb) between VOUT and FB is recommended to optimize transient response with standard 1 µH/10 µF filters.
How does the MODE pin function on NCP6332CMTAATBG?
The MODE pin on NCP6332CMTAATBG selects operating mode: a logic-high signal (>1.1 V) forces continuous PWM operation for constant-frequency, low-noise performance; a logic-low signal (<0.4 V) enables automatic PFM/PWM transition to minimize quiescent current under light load. This pin is exclusive to the 'C' variant (NCP6332CMTAATBG); the 'B' variant uses PG instead and lacks external mode control.
What thermal design practices are critical for NCP6332CMTAATBG?
Effective thermal design for NCP6332CMTAATBG requires soldering the exposed thermal pad (Pin 9) to a solid PCB ground plane using ≥4 thermal vias (0.3 mm diameter), placing the IC on a 4-layer board with internal ground/power planes, and avoiding proximity to heat sources like inductors. With proper layout, the device sustains 1.2 A at 3.6 V input with junction temperature rise <40°C above ambient-critical for reliability in sealed portable enclosures.
Is NCP6332CMTAATBG pin-compatible with other members of the NCP6332 family?
No, NCP6332CMTAATBG is not pin-compatible with NCP6332B variants. While both share identical WDFN-8 packaging and pin numbering, Pin 6 functions as MODE input on NCP6332CMTAATBG but as open-drain Power Good (PG) output on NCP6332B. Swapping them without circuit modification will cause functional failure-e.g., connecting a PG pull-up resistor to MODE may falsely force PWM mode or disrupt enable sequencing.
NCP6332CMTAATBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-WFDFN 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):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (2x2)
NCP6332CMTAATBG FAQ
1.How can I place an order for NCP6332CMTAATBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP6332CMTAATBG 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 NCP6332CMTAATBG reliable?
The price and inventory of NCP6332CMTAATBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP6332CMTAATBG is usually 5 days.
3.What payment methods are accepted for NCP6332CMTAATBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP6332CMTAATBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP6332CMTAATBG?
NCP6332CMTAATBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP6332CMTAATBG 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 NCP6332CMTAATBG?
For technical support, including NCP6332CMTAATBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP6332CMTAATBG requirements.
6.How does Aetrix verify that NCP6332CMTAATBG is sourced from the original manufacturer or authorized distributors?
All NCP6332CMTAATBG 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 NCP6332CMTAATBG meets industry standards.
7.What is the process for return or replacement of NCP6332CMTAATBG?
All NCP6332CMTAATBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP6332CMTAATBG, 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 NCP6332CMTAATBG part is unused and in its original packaging.
Return procedure for NCP6332CMTAATBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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