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onsemi CAT6219-330TDGT3
- Part No.:
- CAT6219-330TDGT3
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
CAT6219-330TDGT3.pdf
- Description:
- IC REG LIN 3.3V 500MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,997
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Product details
Overview
CAT6219-330TDGT3 from onsemi is a fixed-output 3.3 V, 500 mA CMOS low-dropout (LDO) regulator in TSOT-23-5 package, featuring 300 mV typical dropout at full load, ±1.0% initial output accuracy, and 150 µs turn-on time with external 10 nF bypass capacitor - designed for power-sensitive portable electronics requiring stable low-noise rail generation from 2.3 V to 5.5 V input.
For engineers reviewing the CAT6219-330TDGT3 datasheet, pinout, applications, or equivalent options, key selection considerations include guaranteed 500 mA peak current capability, zero shutdown current, thermal protection, ceramic-capacitor stability, and under-voltage lockout activation below 2.15 V.
Technical Context
The CAT6219-330TDGT3 integrates a PMOS pass transistor enabling ultra-low ground current (55 µA no-load, 85 µA full-load) and fast transient response during load steps up to 500 mA. Its internal reference and error amplifier deliver ±1.0% initial accuracy over line, load, and temperature (±2.0% across −40°C to +125°C).
It employs an active-high enable input with integrated 2.5 MΩ pull-down resistor and supports noise reduction via optional 10 nF BYP-to-GND capacitor, improving PSRR to 64 dB at 1 kHz and 54 dB at 20 kHz - critical for RF and audio subsystems powered from noisy battery rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.30 V ±1.0% initial accuracy ensures reliable logic-level compliance for 3.3 V microcontrollers and peripherals. |
| Max Output Current | 500 mA guaranteed peak output supports moderate-power digital loads without thermal derating in TSOT-23-5. |
| Dropout Voltage | 300 mV typical at 500 mA enables operation down to 3.6 V input - critical for single-cell Li-ion or Li-poly systems. |
| Ground Current | 55 µA typical at no load and 85 µA at full load minimizes quiescent power loss in always-on battery applications. |
| PSRR | 64 dB at 1 kHz (with 10 nF BYP cap) suppresses switching noise from upstream DC-DC converters feeding the LDO. |
| Turn-On Time | 150 µs with 10 nF BYP capacitor enables rapid power sequencing in multi-rail embedded systems. |
| UVLO Threshold | 2.15 V typical disables output before battery depletion, preventing brown-out operation of downstream ICs. |
Pinout & Package
Package: TSOT-23-5 (Case 419AE), 1 mm max height, RoHS-compliant NiPdAu finish, footprint-compatible with industry-standard SOT-23-5 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply pin | Accepts 2.3 V–5.5 V; requires 1 µF ceramic decoupling near pin to ensure stability and EMI immunity. |
| GND | Ground reference | Must connect directly to PCB ground plane; serves as return path for all internal currents including BYP and EN. |
| EN | Enable control (active high) | Internal 2.5 MΩ pull-down ensures safe default-off state; logic high ≥1.6 V (over temp) activates regulator. |
| BYP/ADJ | Bypass input / adjust feedback | In fixed-output variant CAT6219-330TDGT3, functions as noise-reduction node for optional 10 nF capacitor to GND. |
| VOUT | Regulated output | Delivers 3.30 V ±1.0%; requires 2.2 µF ceramic output capacitor placed adjacent to pin for transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Quick-start bypass architecture | Enables 10 nF BYP capacitor to reduce output noise without extending turn-on delay - preserves system boot timing integrity. |
| Ceramic-capacitor stability | Stable with 2.2 µF X5R/X7R ceramic output capacitor only - eliminates need for costly tantalum or aluminum electrolytics. |
| Fold-back current limit | Reduces short-circuit current to ~200 mA during fault, limiting power dissipation and enabling self-recovery after overload removal. |
| Thermal shutdown with hysteresis | Triggers at 160°C junction temperature with 10°C hysteresis - prevents cycling during sustained high-power operation in compact enclosures. |
| Zero shutdown current | Draws <1 µA when EN = low - essential for long-term storage or deep-sleep modes in IoT edge nodes and wearables. |
Applications
| Smartphone Baseband Power | Wireless Headset Audio Rail |
|---|---|
|
Use Scenario: Powers baseband processor core voltage in dual-SIM smartphones where input rail varies between 3.4 V–4.2 V during battery discharge. IC Role / Device Role / Timing Role: Primary 3.3 V LDO delivering clean, low-noise supply with fast load-step response to handle burst-mode data transmission. Use Value: 300 mV dropout allows >90% battery utilization; ±1.0% accuracy maintains CPU timing margins across temperature. |
Use Scenario: Supplies analog audio codec and Bluetooth radio in true wireless stereo (TWS) earbuds with tight space constraints. IC Role / Device Role / Timing Role: Low-noise 3.3 V regulator with BYP capacitor filtering switching ripple from shared buck converter powering digital subsystems. Use Value: 64 dB PSRR at 1 kHz suppresses audible switching artifacts; 55 µA ground current extends single-charge playback time. |
| Industrial Sensor Node MCU | Portable Medical Monitor Display |
|
Use Scenario: Powers ARM Cortex-M0+ microcontroller and precision ADC in battery-operated environmental sensor node deployed outdoors. IC Role / Device Role / Timing Role: Main system rail generator with UVLO preventing erratic firmware execution during cold-start or low-battery conditions. Use Value: −40°C to +125°C operating range and ±2.0% accuracy over temperature ensure measurement repeatability in uncontrolled environments. |
Use Scenario: Provides regulated 3.3 V for OLED display controller and touch interface in handheld patient vital-sign monitor. IC Role / Device Role / Timing Role: Safety-critical power stage with thermal protection and fold-back current limiting to prevent overheating in sealed plastic housing. Use Value: 160°C thermal shutdown with 10°C hysteresis avoids latch-up; RoHS-compliant, halogen-free construction meets medical device material requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-3302E/MB | 300 mA rated output, higher 600 mV dropout at full load, no BYP pin or quick-start feature. | Limited to lower-current peripherals; lacks noise-reduction capability needed for RF/audio circuits. | Select only if cost sensitivity outweighs performance needs and load current stays ≤300 mA. |
| TLS850B2TEV50 | Automotive-grade AEC-Q100 qualified, 500 mA, but larger TSON-10 package and 450 mV dropout at 500 mA. | Designed for automotive infotainment; overqualified for consumer portables, adds layout complexity. | Choose only for automotive programs requiring AEC-Q100; not recommended for space-constrained consumer designs. |
Compared with MCP1703-3302E/MB and TLS850B2TEV50, CAT6219-330TDGT3 uniquely balances 500 mA capability, 300 mV dropout, 10 nF BYP-enabled low-noise operation, and TSOT-23-5 footprint - making it optimal for compact, battery-powered systems demanding both efficiency and signal integrity.
Availability
CAT6219-330TDGT3 is available at Aetrix Electronics and suitable for smartphone baseband power, wireless audio subsystems, and industrial sensor node MCU supply requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for CAT6219-330TDGT3 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 innovation for automotive, industrial, cloud, and intelligent edge applications.
The CAT6219 product line delivers high-performance, low-quiescent-current LDO regulators optimized for battery-powered portable electronics - emphasizing small footprint, ceramic-capacitor compatibility, and robust protection features.
FAQ
What is the maximum input voltage rating for CAT6219-330TDGT3?
The absolute maximum input voltage for CAT6219-330TDGT3 is 6.5 V, but the recommended operating range is strictly 2.3 V to 5.5 V per the datasheet. Exceeding 5.5 V risks permanent damage or degraded reliability, even briefly. CAT6219-330TDGT3 must be used within this 2.3–5.5 V window for guaranteed performance and lifetime compliance.
Does CAT6219-330TDGT3 require an external bypass capacitor to function?
No - CAT6219-330TDGT3 operates fully functional without the 10 nF BYP capacitor. That capacitor is optional and improves PSRR and output noise performance; its omission does not affect regulation, stability, or basic enable/disable behavior. CAT6219-330TDGT3 maintains specified 3.3 V output accuracy and transient response even with BYP unconnected.
Can CAT6219-330TDGT3 be used with aluminum electrolytic output capacitors?
No - CAT6219-330TDGT3 is specifically characterized and guaranteed stable only with ceramic output capacitors (2.2 µF minimum, X5R/X7R dielectric). Aluminum electrolytic capacitors introduce excessive ESR and phase shift that can cause oscillation or poor transient response. Using them voids stability guarantees and may result in malfunction. CAT6219-330TDGT3 requires low-ESR ceramic capacitors per design specification.
What is the thermal shutdown behavior of CAT6219-330TDGT3?
CAT6219-330TDGT3 enters thermal shutdown at 160°C junction temperature and remains off until junction cools by 10°C (hysteresis), resuming normal operation at ~150°C. During shutdown, output is disabled and ground current drops to <1 µA. This protects the device during sustained overload or poor PCB thermal design. CAT6219-330TDGT3 implements this autonomously without external circuitry.
Is CAT6219-330TDGT3 pin-compatible with other CAT6219 variants in TSOT-23-5?
Yes - all CAT6219 variants with TDGT3 suffix (e.g., CAT6219-180TDGT3, CAT6219-280TDGT3, CAT6219-330TDGT3) share identical TSOT-23-5 pinout, footprint, and terminal functions. Only the fixed output voltage differs; no PCB redesign is needed when substituting between these versions. CAT6219-330TDGT3 drops into the same layout as any other TDGT3-suffixed CAT6219 device.
CAT6219-330TDGT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- 64dB ~ 54dB (1kHz ~ 20kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
CAT6219-330TDGT3 FAQ
1.How can I place an order for CAT6219-330TDGT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAT6219-330TDGT3 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 CAT6219-330TDGT3 reliable?
The price and inventory of CAT6219-330TDGT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAT6219-330TDGT3 is usually 5 days.
3.What payment methods are accepted for CAT6219-330TDGT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAT6219-330TDGT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAT6219-330TDGT3?
CAT6219-330TDGT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAT6219-330TDGT3 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 CAT6219-330TDGT3?
For technical support, including CAT6219-330TDGT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAT6219-330TDGT3 requirements.
6.How does Aetrix verify that CAT6219-330TDGT3 is sourced from the original manufacturer or authorized distributors?
All CAT6219-330TDGT3 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 CAT6219-330TDGT3 meets industry standards.
7.What is the process for return or replacement of CAT6219-330TDGT3?
All CAT6219-330TDGT3 units undergo pre-shipment inspection (PSI). If there is an issue with CAT6219-330TDGT3, 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 CAT6219-330TDGT3 part is unused and in its original packaging.
Return procedure for CAT6219-330TDGT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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