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onsemi CAT6217-280TDGT3
- Part No.:
- CAT6217-280TDGT3
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
CAT6217-280TDGT3.pdf
- Description:
- IC REG LIN 2.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:60,000
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Product details
Overview
CAT6217-280TDGT3 from onsemi is a 2.80 V fixed-output, 150 mA CMOS low dropout regulator in TSOT-23-5 package, delivering 90 mV typical dropout at full load, ±1.0% initial output accuracy, and 45 µVRMS output noise with 10 nF BYP capacitor - deployed in battery-powered portable electronics requiring stable low-noise voltage rails.
For engineers reviewing the CAT6217-280TDGT3 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 150 mA output under 2.3–5.5 V input, zero shutdown current, thermal/short-circuit protection, and compatibility with 1 µF ceramic output capacitors for space-constrained designs.
Technical Context
The CAT6217-280TDGT3 integrates a precision bandgap reference, low-ESR LDO pass element, and internal UVLO (2.1 V threshold) to ensure safe operation during brownout conditions. Its quick-start architecture enables 150 µs turn-on time while supporting external 10 nF bypass capacitance for PSRR enhancement up to 64 dB at 1 kHz.
It features active-high enable logic with integrated 2.5 MΩ pull-down, eliminating external components for default-disable behavior. Ground current remains stable at 55 µA no-load and rises only to 80 µA at 150 mA, enabling high efficiency across load range without compromising transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.80 V ±1.0% initial accuracy ensures precise rail generation for 2.8 V I/O or core supplies. |
| Max Output Current | 150 mA guaranteed output supports moderate-power microcontrollers, sensors, and RF front-ends. |
| Dropout Voltage | 90 mV typical at 150 mA allows operation down to VIN = 2.89 V, extending battery runtime in single-cell Li-ion or alkaline systems. |
| Ground Current | 55 µA typical at no load and 80 µA at full load minimizes quiescent power loss in always-on subsystems. |
| Output Noise | 45 µVRMS (10 Hz–100 kHz) with 10 nF BYP capacitor meets low-noise requirements for ADC references and audio codecs. |
| PSRR | 64 dB at 1 kHz (with BYP cap) suppresses supply ripple from noisy DC-DC stages feeding sensitive analog circuitry. |
| Enable Threshold | VHI = 1.6 V min over temperature enables reliable control from 1.8 V GPIO or battery-monitored logic signals. |
Pinout & Package
The CAT6217-280TDGT3 is housed in a RoHS-compliant, halogen-free 5-lead TSOT-23 package (Case 419AE), 1 mm max height, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.3–5.5 V; requires local 1 µF ceramic bypass to GND for stability and EMI reduction. |
| GND | Power ground reference | Mandatory low-impedance connection to PCB ground plane; shared return for all internal circuits. |
| EN | Active-high enable input | Internally pulled down to GND via 2.5 MΩ resistor; open-circuit defaults to OFF state. |
| BYP | Reference bypass node | Connects optional 10 nF capacitor to GND to reduce output noise and improve PSRR above 10 kHz. |
| VOUT | Regulated output terminal | Delivers 2.80 V ±1% with 150 mA capability; requires 1 µF ceramic capacitor (5–500 m ESR) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Quick-start architecture | 150 µs turn-on time with 10 nF BYP cap enables fast wake-up in duty-cycled sensor nodes. |
| Zero shutdown current | 1 µA max shutdown ground current preserves battery charge during extended sleep modes. |
| Thermal + short-circuit protection | Auto-shutdown at 160 °C with 10 °C hysteresis and 350 mA current limit prevent damage under fault conditions. |
| UVLO circuit | Disables output below 2.1 V typical input to avoid erratic behavior during battery depletion. |
| Stable with 1 µF ceramic COUT | Eliminates need for tantalum or aluminum electrolytic capacitors, reducing cost and board area. |
Applications
| Wearable Health Monitor | Bluetooth LE Sensor Node |
|---|---|
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Provides ultra-low-noise 2.80 V analog supply for precision ADC and op-amp front-end. Use Value: 45 µVRMS output noise and 64 dB PSRR ensure clean reference voltage, minimizing baseline drift and improving SNR. | Use Scenario: Intermittent temperature/humidity sensing with BLE radio transmission bursts. IC Role / Device Role / Timing Role: Powers MCU and sensor ICs during active periods; shuts down fully between measurements. Use Value: 1 µA shutdown current and 150 µs wake-up time maximize battery life while meeting sub-second latency requirements. |
| Smart Remote Control | Industrial Handheld Scanner |
Use Scenario: IR-based remote using two AAA alkaline cells with variable load profile. IC Role / Device Role / Timing Role: Regulates 2.80 V rail for microcontroller and IR LED driver under varying input (3.0–4.5 V). Use Value: 90 mV dropout enables >95% battery utilization; ±1.0% accuracy maintains consistent LED brightness and button response timing. | Use Scenario: Ruggedized barcode scanner operating across −20 °C to +70 °C ambient. IC Role / Device Role / Timing Role: Supplies 2.80 V to image sensor and decode ASIC with thermal protection during extended scanning. Use Value: Stable ±2.0% accuracy over temperature and 160 °C thermal shutdown prevent field failures in hot industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 300 mA output, higher 250 µA no-load ground current, no BYP pin or quick-start feature. | Lacks noise-reduction capability; unsuitable where <50 µV RMS noise is required. | Select when higher output current is needed and noise performance is secondary. |
| TCS2117-2800DBVR | 150 mA output, 1.2% initial accuracy, no integrated UVLO, 100 µA no-load ground current. | Requires external UVLO circuit for battery cutoff; less accurate for precision analog rails. | Choose only if footprint compatibility is critical and system-level UVLO is already implemented. |
Compared with MCP1700T-2802E/TT and TCS2117-2800DBVR, the CAT6217-280TDGT3 uniquely combines low-noise operation (via BYP), ultra-low quiescent current, and built-in UVLO - making it optimal for compact, battery-sensitive applications demanding both precision and reliability.
Availability
CAT6217-280TDGT3 is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, and smart remote controls requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CAT6217-280TDGT3 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, serving automotive, industrial, cloud, medical, and IoT markets with discrete, analog, and power management solutions.
The CAT6217 series belongs to onsemi's precision CMOS LDO portfolio, engineered specifically for ultra-low-power, noise-sensitive portable devices operating from single-cell batteries or variable-input sources.
FAQ
What is the output voltage tolerance of the CAT6217-280TDGT3 over temperature?
The CAT6217-280TDGT3 maintains ±2.0% output voltage accuracy across the full operating junction temperature range of −40 °C to +125 °C. This specification applies to all versions with VOUT ≥ 2.0 V, including the 2.80 V variant. The tighter ±1.0% initial accuracy is measured at 25 °C before temperature cycling or aging effects.
Does the CAT6217-280TDGT3 require an external bypass capacitor for basic operation?
No - the CAT6217-280TDGT3 operates stably without the BYP capacitor. The 10 nF capacitor on the BYP pin is optional and used solely to reduce output noise and improve PSRR at high frequencies. Basic regulation, startup, and load transient response are fully functional with only VIN, VOUT, and GND capacitors installed.
What happens to the output when the input voltage drops below 2.1 V?
When VIN falls below the typical 2.1 V under-voltage lockout (UVLO) threshold, the CAT6217-280TDGT3 disables its output to prevent unstable regulation and potential system malfunction. The output is actively discharged via a 250 Ω internal switch, ensuring rapid and controlled shutdown - a critical safety feature for battery-powered systems nearing end-of-life.
Can the CAT6217-280TDGT3 be used with ceramic output capacitors smaller than 1 µF?
No - the CAT6217-280TDGT3 is specified and tested for stability only with a minimum 1 µF ceramic output capacitor (ESR 5–500 mΩ). Using smaller values risks oscillation or poor transient response. The datasheet explicitly states "Stable operation is provided with a 1 µF ceramic capacitor", and no lower bound is qualified.
Is the EN pin of the CAT6217-280TDGT3 compatible with 1.8 V logic levels?
Yes - the EN pin of the CAT6217-280TDGT3 has a guaranteed logic-high threshold of 1.6 V minimum across −40 °C to +125 °C junction temperature, making it fully compatible with standard 1.8 V GPIO outputs. Its internal 2.5 MΩ pull-down ensures robust default-OFF behavior even when driven by open-drain or high-impedance controllers.
CAT6217-280TDGT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.15V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 64dB ~ 54dB (1kHz ~ 20kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
CAT6217-280TDGT3 FAQ
1.How can I place an order for CAT6217-280TDGT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAT6217-280TDGT3 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 CAT6217-280TDGT3 reliable?
The price and inventory of CAT6217-280TDGT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAT6217-280TDGT3 is usually 5 days.
3.What payment methods are accepted for CAT6217-280TDGT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAT6217-280TDGT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAT6217-280TDGT3?
CAT6217-280TDGT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAT6217-280TDGT3 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 CAT6217-280TDGT3?
For technical support, including CAT6217-280TDGT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAT6217-280TDGT3 requirements.
6.How does Aetrix verify that CAT6217-280TDGT3 is sourced from the original manufacturer or authorized distributors?
All CAT6217-280TDGT3 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 CAT6217-280TDGT3 meets industry standards.
7.What is the process for return or replacement of CAT6217-280TDGT3?
All CAT6217-280TDGT3 units undergo pre-shipment inspection (PSI). If there is an issue with CAT6217-280TDGT3, 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 CAT6217-280TDGT3 part is unused and in its original packaging.
Return procedure for CAT6217-280TDGT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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