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onsemi CAT6217-180TDGT3
- Part No.:
- CAT6217-180TDGT3
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
CAT6217-180TDGT3.pdf
- Description:
- IC REG LDO 1.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
CAT6217-180TDGT3 from onsemi is a 150 mA CMOS low dropout regulator with 1.8 V fixed output, 90 mV typical dropout at full load, ±1.0% initial accuracy, and stable operation using only a 1 µF ceramic output capacitor. It delivers fast transient response in battery-powered consumer electronics requiring clean, regulated 1.8 V supply under varying load and line conditions.
For engineers reviewing the CAT6217-180TDGT3 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 150 mA output, ultra-low 55 µA no-load ground current, quick-start capability with 10 nF BYP capacitor, thermal/short-circuit protection, and TSOT-23-5 package compatibility for space-constrained portable designs.
Technical Context
The CAT6217-180TDGT3 integrates a CMOS pass transistor with internal voltage reference, enabling low dropout and high PSRR (64 dB at 1 kHz with 10 nF BYP capacitor). Its enable logic includes a built-in 2.5 MΩ pull-down resistor, ensuring default-off behavior when EN is floating.
It features an under-voltage lockout (UVLO) threshold of 2.1 V typical and a dedicated BYP pin for external 10 nF capacitor connection-reducing output noise (45 µVRMS, 10 Hz–100 kHz) and enhancing high-frequency PSRR without compromising turn-on time (150 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.0% initial accuracy ensures stable core logic or memory supply without external feedback components. |
| Max Output Current | 150 mA guaranteed output supports microcontrollers, sensors, or RF ICs in compact portable devices. |
| Dropout Voltage | 90 mV typical at 150 mA enables regulation from 1.89 V input-critical for single-cell Li-ion or Li-poly systems near end-of-discharge. |
| Ground Current | 55 µA typical at no load minimizes quiescent power loss, extending battery life in always-on standby modes. |
| Output Capacitor | Stable with ≥1 µF ceramic capacitor (ESR 5–500 mΩ), reducing BOM cost and PCB area vs. tantalum or electrolytic alternatives. |
| PSRR | 64 dB at 1 kHz (with 10 nF BYP) suppresses switching noise from adjacent DC-DC converters in mixed-signal applications. |
| Enable Threshold | Logic-high enable threshold ≥1.6 V over temperature allows direct interfacing with 1.8 V GPIO without level-shifting. |
Pinout & Package
The CAT6217-180TDGT3 is housed in a 5-lead TSOT-23 package (1 mm max height, case 419AE), optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.3–5.5 V; requires local 1 µF ceramic bypass to GND for stability and noise filtering. |
| GND | Ground reference | Low-impedance return path for LDO and bypass capacitors; must connect directly to PCB ground plane. |
| EN | Active-high enable control | Internal 2.5 MΩ pull-down ensures safe default-off state; compatible with 1.8 V logic without external resistors. |
| BYP | Reference bypass node | Connects optional 10 nF capacitor to GND to reduce output noise and improve PSRR above 10 kHz. |
| VOUT | Regulated output | Delivers 1.8 V ±1% with ≤150 mA load; requires local 1 µF ceramic capacitor (ESR 5–500 mΩ) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Quick-start with BYP capacitor | Enables 150 µs turn-on time while simultaneously reducing output noise to 45 µVRMS (10 Hz–100 kHz). |
| Zero shutdown current | 1 µA max shutdown ground current eliminates battery drain during system sleep or power-off states. |
| Thermal + short-circuit protection | Auto-shutdown at 160 °C with 10 °C hysteresis and 350 mA output current limit prevent damage during fault conditions. |
| Ultra-low-noise regulation | 45 µVRMS output noise and 64 dB PSRR at 1 kHz support noise-sensitive analog circuits like ADCs or RF receivers. |
| 1% initial accuracy | Ensures reliable operation of 1.8 V I/O domains and low-voltage cores without post-production calibration. |
Applications
| Smartphone Baseband Power | Wearable Sensor Hub |
|---|---|
Use Scenario: Regulating 1.8 V supply for baseband processor I/O banks in LTE/5G smartphones operating from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary low-noise LDO delivering stable 1.8 V to high-speed digital interfaces with minimal voltage deviation during burst data transmission. Use Value: 90 mV dropout enables >95% efficiency at end-of-discharge (3.0 V input), while 64 dB PSRR isolates baseband logic from noisy PMIC switching artifacts. | Use Scenario: Powering MEMS accelerometers, gyroscopes, and BLE radio subsystems in fitness trackers with tight size and battery-life constraints. IC Role / Device Role / Timing Role: Always-on LDO supplying 1.8 V to sensor interface and wireless transceiver, activated only during measurement cycles via EN pin control. Use Value: 55 µA no-load ground current extends multi-week battery life; quick-start enables sub-200 µs wake-up from deep sleep without output overshoot. |
| IoT Edge Node MCU Core | Portable Medical Monitor |
Use Scenario: Providing clean 1.8 V core voltage to ARM Cortex-M0+ microcontrollers in battery-powered environmental sensors deployed outdoors. IC Role / Device Role / Timing Role: Main system LDO with thermal protection, supporting wide ambient temperature range (−40 °C to +125 °C junction). Use Value: ±1.0% initial accuracy maintains MCU timing integrity across voltage and temperature; 1 µF ceramic stability simplifies layout in moisture-prone enclosures. | Use Scenario: Supplying 1.8 V to low-power ECG front-end ASIC and display driver in handheld patient monitors powered by rechargeable coin cells. IC Role / Device Role / Timing Role: Precision LDO with UVLO (2.1 V) preventing erratic operation during battery depletion, paired with short-circuit protection for patient safety compliance. Use Value: 2.1 V UVLO threshold aligns with coin-cell discharge curve; 150 mA output headroom supports brief LCD backlight activation without brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 250 mA output, 600 mV dropout at 250 mA, 1.6 µA quiescent current, SOT-23-3 package (no EN/BYP pins) | Lacks enable and bypass pins; simpler but less flexible for noise-sensitive or sequenced power systems | Select when ultra-low IQ dominates design priority and 250 mA headroom is needed-but verify absence of EN/BYP does not compromise system control or noise requirements. |
| Torex XC6206P182MR-G | 150 mA output, 350 mV dropout at 150 mA, ±2% accuracy, SOT-23-5 package with EN pin (no BYP pin) | Higher dropout limits usable input range; no BYP pin eliminates high-frequency PSRR enhancement option | Choose for cost-sensitive applications where 1.8 V ±2% tolerance is acceptable and noise immunity is secondary to BOM simplicity. |
Compared with MCP1700-1802E/TO and XC6206P182MR-G, the CAT6217-180TDGT3 uniquely combines 150 mA output, 90 mV dropout, ±1% accuracy, EN/BYP functionality, and 45 µVRMS noise-making it optimal for high-integration portable systems demanding precision, low noise, and controlled sequencing.
Availability
CAT6217-180TDGT3 is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, and IoT edge node MCU core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CAT6217-180TDGT3 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 manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The CAT6217 series belongs to onsemi's precision LDO portfolio, engineered specifically for battery-powered portable electronics requiring ultra-low quiescent current, fast transient response, and high PSRR in miniature TSOT-23 packages.
FAQ
What is the output voltage tolerance of the CAT6217-180TDGT3 over temperature?
The CAT6217-180TDGT3 provides ±2.0% output voltage accuracy over the full junction temperature range (−40 °C to +125 °C) for VOUT ≥ 2.0 V. Since this is the 1.8 V version, its accuracy is ±3.0% across temperature per datasheet Note 6-verified in Table 3 under "Output Voltage Accuracy" for VOUT < 2.0 V.
Does the CAT6217-180TDGT3 require an external bypass capacitor for basic operation?
No-the CAT6217-180TDGT3 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 above 10 kHz; omitting it does not affect regulation, stability, or enable timing of the CAT6217-180TDGT3.
What is the minimum input voltage required for the CAT6217-180TDGT3 to maintain regulation at 150 mA load?
The CAT6217-180TDGT3 requires VIN ≥ (VOUT + VDROP) = 1.8 V + 0.09 V = 1.89 V minimum to maintain regulation at 150 mA. However, the absolute minimum operating VIN is 2.3 V per Recommended Operating Conditions-ensuring UVLO remains inactive and all specs remain valid.
Can the CAT6217-180TDGT3 be used with ceramic output capacitors below 1 µF?
No-datasheet Section 3 explicitly states stable operation requires ≥1 µF ceramic output capacitor (COUT) with ESR between 5 mΩ and 500 mΩ. Using smaller values risks instability, oscillation, or degraded transient response in the CAT6217-180TDGT3.
Is the CAT6217-180TDGT3 pin-compatible with other variants in the CAT6217 family?
Yes-all CAT6217 variants (including CAT6217-180TDGT3, CAT6217-280TDGT3, etc.) share identical 5-lead TSOT-23 pinout and footprint (case 419AE). Output voltage is set internally, so swapping variants requires only soldering change-no PCB redesign is needed for the CAT6217-180TDGT3 or any other member.
CAT6217-180TDGT3 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):
- 1.8V
- 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
CAT6217-180TDGT3 FAQ
1.How can I place an order for CAT6217-180TDGT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAT6217-180TDGT3 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 CAT6217-180TDGT3 reliable?
The price and inventory of CAT6217-180TDGT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAT6217-180TDGT3 is usually 5 days.
3.What payment methods are accepted for CAT6217-180TDGT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAT6217-180TDGT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAT6217-180TDGT3?
CAT6217-180TDGT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAT6217-180TDGT3 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 CAT6217-180TDGT3?
For technical support, including CAT6217-180TDGT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAT6217-180TDGT3 requirements.
6.How does Aetrix verify that CAT6217-180TDGT3 is sourced from the original manufacturer or authorized distributors?
All CAT6217-180TDGT3 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 CAT6217-180TDGT3 meets industry standards.
7.What is the process for return or replacement of CAT6217-180TDGT3?
All CAT6217-180TDGT3 units undergo pre-shipment inspection (PSI). If there is an issue with CAT6217-180TDGT3, 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 CAT6217-180TDGT3 part is unused and in its original packaging.
Return procedure for CAT6217-180TDGT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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