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onsemi CAT6219-250TDGT3
- Part No.:
- CAT6219-250TDGT3
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
CAT6219-250TDGT3.pdf
- Description:
- IC REG LIN 2.5V 500MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,144
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Product details
Overview
CAT6219-250TDGT3 from onsemi is a fixed-output 2.50 V, 500 mA CMOS low-dropout 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 noise-sensitive battery-powered applications such as cellular handsets and portable medical sensors.
For engineers reviewing the CAT6219-250TDGT3 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 500 mA output under 2.3–5.5 V input, zero shutdown current, thermal/overcurrent protection, and stable operation with 2.2 µF ceramic output capacitor-critical for space-constrained, low-power embedded systems.
Technical Context
The CAT6219-250TDGT3 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and pass transistor, enabling fast transient response to load steps up to 500 mA. Its enable logic includes a 2.5 MΩ internal pull-down resistor, ensuring default-off behavior when EN is floating.
It integrates under-voltage lockout (UVLO) that disables regulation below 2.15 V typical VIN, plus fold-back current limiting and thermal shutdown at 160 °C with 10 °C hysteresis-ensuring robust operation across −40 °C to +125 °C junction temperature range without external supervision circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.50 V ±1.0% initial accuracy ensures stable rail for 2.5 V logic or analog circuitry without trimming. |
| Max Output Current | 500 mA guaranteed peak output supports moderate-power peripherals like RF transceivers or ADC drivers. |
| Dropout Voltage | 300 mV typical at 500 mA enables operation down to 2.8 V input for 2.5 V output-critical for single-cell Li-ion or Li-poly systems. |
| Ground Current | 55 µA typical at no load minimizes quiescent drain in sleep modes; rises to 85 µA at full load. |
| PSRR | 64 dB at 1 kHz (with 10 nF BYP cap) suppresses input ripple-essential for powering noise-sensitive analog stages. |
| Turn-On Time | 150 µs with 10 nF bypass capacitor enables rapid power sequencing in wake-up events. |
| Thermal Shutdown | 160 °C activation with 10 °C hysteresis prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
Package: TSOT-23-5 (Case 419AE), 2.9 mm × 1.6 mm × 1.0 mm max height, RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply pin | Accepts 2.3–5.5 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) | Logic-high ≥1.6 V enables regulation; internal 2.5 MΩ pull-down guarantees safe default-off state if left unconnected. |
| BYP/ADJ | Bypass input (fixed version) | Connects to 10 nF capacitor to GND for enhanced PSRR and reduced output noise-no effect on startup timing. |
| VOUT | Regulated output | Delivers 2.50 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 150 µs turn-on while maintaining ultra-low noise via optional 10 nF BYP capacitor-no trade-off between speed and cleanliness. |
| Zero shutdown current | 1 µA max shutdown ground current eliminates standby leakage-ideal for long-life battery applications requiring years of shelf life. |
| Ceramic-capacitor stability | Stable with 2.2 µF X5R/X7R ceramic output capacitor only-eliminates need for costly tantalum or electrolytic alternatives. |
| Integrated UVLO | Disables output below 2.15 V typical VIN-prevents brown-out operation and data corruption in low-battery conditions. |
| Fold-back current limit | Reduces short-circuit current to ~200 mA at VOUT = 0 V-limits power dissipation and avoids thermal runaway during fault conditions. |
Applications
| Cellular Handset Power Rail | Portable Medical Sensor |
|---|---|
Use Scenario: Powers baseband processor I/O and RF front-end bias rails in compact 4G/5G smartphones operating from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary 2.5 V LDO delivering clean, regulated voltage with fast load-step response to handle burst-mode transmission. Use Value: 300 mV dropout allows >95% usable battery voltage range; 64 dB PSRR rejects switching noise from PMIC DC-DC converters. | Use Scenario: Supplies analog front-end (AFE) and low-power microcontroller in wearable ECG or pulse oximeter devices. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO generating stable 2.5 V reference and core logic rail during multi-day continuous monitoring. Use Value: 45 µVrms output noise and 55 µA no-load current extend battery life beyond 7 days on coin-cell or small Li-poly cells. |
| Industrial IoT Node | Smart Home Sensor Hub |
Use Scenario: Provides regulated 2.5 V to LoRaWAN or NB-IoT transceiver and environmental sensor interface in battery-operated edge nodes. IC Role / Device Role / Timing Role: Always-on LDO supporting deep-sleep wake-up cycles with sub-100 µs voltage stabilization. Use Value: 150 µs turn-on time meets strict low-power MCU wake-up timing budgets; thermal protection prevents field failure in enclosed enclosures. | Use Scenario: Powers voice processing ASIC and MEMS microphone bias in battery-backed smart speaker or motion sensor hub. IC Role / Device Role / Timing Role: Noise-suppressed 2.5 V rail isolating sensitive audio paths from noisy digital subsystems. Use Value: External 10 nF BYP capacitor reduces high-frequency noise by >20 dB-critical for SNR preservation in far-field voice capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | 250 mA max output, 6 µA quiescent current, SOT-23-3 package (no EN/BYP pins) | Limited to ultra-low-power microcontrollers; lacks enable control and noise-reduction bypass capability | Select only when output current ≤250 mA and board space is extreme constraint; not suitable for 500 mA loads or noise-critical AFEs |
| TLC76025DCQ | 2.5 V fixed, 300 mA, 120 µA IQ, SOIC-8 package with thermal pad; no BYP pin | Higher quiescent current and larger footprint; lacks quick-start bypass feature for noise suppression | Prefer for industrial ambient temperatures >85 °C where SOIC thermal performance exceeds TSOT-23; avoid when PSRR >60 dB required above 1 kHz |
Compared with MCP1700-2502E/TO and TLC76025DCQ, the CAT6219-250TDGT3 uniquely delivers 500 mA output, 150 µs turn-on with bypass-enabled low noise, and zero shutdown current-all in a 5-pin TSOT-23 footprint-making it optimal for compact, high-performance battery-powered systems demanding both current headroom and signal integrity.
Availability
CAT6219-250TDGT3 is available at Aetrix Electronics and suitable for cellular handset power management, portable medical sensing, and industrial IoT node designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for CAT6219-250TDGT3 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 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for battery-powered consumer and medical devices requiring ultra-low IQ, fast transient response, and minimal board area.
FAQ
What is the maximum input voltage rating for CAT6219-250TDGT3?
The CAT6219-250TDGT3 has an absolute maximum input voltage (VIN) rating of 6.5 V. However, its recommended operating input range is strictly 2.3 V to 5.5 V per the datasheet. Exceeding 5.5 V-even briefly-may trigger overvoltage stress and compromise reliability. The device includes no internal overvoltage protection, so external clamping or regulation is required if input transients exceed 5.5 V.
Does CAT6219-250TDGT3 require an external bypass capacitor to function?
No, the CAT6219-250TDGT3 operates fully functional without an external bypass capacitor. The 10 nF capacitor on the BYP pin is optional and used solely to improve PSRR and reduce output noise-particularly above 1 kHz. Omitting it does not affect regulation, stability, or basic functionality; the LDO maintains 2.50 V output with only VIN, GND, EN, and VOUT connections and required input/output ceramics.
Can CAT6219-250TDGT3 be used with a 2.2 µF X7R ceramic capacitor for COUT?
Yes, CAT6219-250TDGT3 is explicitly characterized and guaranteed stable with a 2.2 µF X7R ceramic output capacitor (COUT), as confirmed in Table 4 and Figure 1–2 of the datasheet. No ESR requirements apply-unlike older LDOs-so standard 0805 or 0603 X7R dielectrics with ≤500 mΩ ESR are fully compatible and recommended for minimal footprint and cost.
What happens to the output of CAT6219-250TDGT3 when EN is left floating?
When the EN pin of CAT6219-250TDGT3 is left floating, the internal 2.5 MΩ pull-down resistor pulls it to GND, resulting in logic-low voltage (<0.4 V). This forces the device into shutdown mode, disabling the output and reducing ground current to ≤1 µA. Therefore, no external pull-down is needed-floating EN is a valid and safe configuration for default-off operation.
Is CAT6219-250TDGT3 RoHS-compliant and halogen-free?
Yes, CAT6219-250TDGT3 is fully RoHS-compliant, lead-free, and halogen-free/BFR-free per the ordering information note on page 11 of the datasheet. It uses NiPdAu pre-plated lead frames and conforms to JEDEC MO-193 packaging standards. The "G" marking indicator may appear on the top-side laser marking to denote Pb-free compliance, though its presence is optional per onsemi's packaging specification.
CAT6219-250TDGT3 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):
- 2.5V
- 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
CAT6219-250TDGT3 FAQ
1.How can I place an order for CAT6219-250TDGT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAT6219-250TDGT3 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 CAT6219-250TDGT3 reliable?
The price and inventory of CAT6219-250TDGT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAT6219-250TDGT3 is usually 5 days.
3.What payment methods are accepted for CAT6219-250TDGT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAT6219-250TDGT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAT6219-250TDGT3?
CAT6219-250TDGT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAT6219-250TDGT3 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 CAT6219-250TDGT3?
For technical support, including CAT6219-250TDGT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAT6219-250TDGT3 requirements.
6.How does Aetrix verify that CAT6219-250TDGT3 is sourced from the original manufacturer or authorized distributors?
All CAT6219-250TDGT3 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 CAT6219-250TDGT3 meets industry standards.
7.What is the process for return or replacement of CAT6219-250TDGT3?
All CAT6219-250TDGT3 units undergo pre-shipment inspection (PSI). If there is an issue with CAT6219-250TDGT3, 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 CAT6219-250TDGT3 part is unused and in its original packaging.
Return procedure for CAT6219-250TDGT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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