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Diodes Incorporated ZXCL250H5TA
- Part No.:
- ZXCL250H5TA
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ZXCL250H5TA.pdf
- Description:
- IC REG LINEAR 2.5V 100MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,972
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Product details
Overview
ZXCL250H5TA from Diodes Incorporated is a 2.5V fixed-output, micropower low-dropout linear regulator in SC70-5/SOT353 package, featuring 85mV dropout at 50mA, 50µA ground current at 150mA load, and active-high enable control. It delivers stable regulation for battery-powered portable electronics requiring ultra-low quiescent current and no-load stability.
For engineers reviewing the ZXCL250H5TA datasheet, ZXCL250H5TA pinout, ZXCL250H5TA application, or ZXCL250H5TA equivalent, key selection criteria include dropout voltage under light-to-moderate load, shutdown current (<1µA), thermal overload protection (125°C trip), and compatibility with 1µF ceramic output capacitors without external compensation.
Technical Context
The ZXCL250H5TA employs a PMOS pass transistor architecture enabling low dropout and minimal ground current across operating conditions-including startup, dropout, and full 150mA load. Its bandgap reference and error amplifier deliver ±2% output voltage accuracy over temperature and line/load variations.
It integrates TTL/CMOS-compatible active-high enable logic with 150mV hysteresis, thermal shutdown (125°C activation), and current limiting (160–800mA range). The device operates stably with 1µF ceramic output capacitors and exhibits 50µVRMS output noise (10Hz–100kHz) without bypass capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% at 1mA–100mA load; supports CMOS RAM backup and low-voltage microcontroller I/O rails. |
| Dropout Voltage | 85mV at 50mA load; enables operation with VIN as low as 2.585V while maintaining regulation. |
| Ground Current | 50µA at 150mA load; minimizes battery drain in always-on portable systems. |
| Shutdown Current | <1µA at VEN = 0V; ensures near-zero power loss during system sleep modes. |
| Thermal Shutdown | 125°C junction temperature threshold; cycles output until thermal fault clears, protecting PCB and adjacent components. |
| PSRR | 60dB at 1kHz (COUT = 2.2µF); suppresses supply ripple from noisy battery chargers or DC-DC converters. |
| Output Noise | 50µVRMS (10Hz–100kHz); suitable for analog sensor front-ends and RF biasing without added filtering. |
Pinout & Package
SC70-5/SOT353 (H5) package: 1.3mm × 2.1mm footprint, 0.65mm pitch, 0.95mm height - optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.0V–5.5V input; internal diode anode tied to VO limits reverse current to 5mA continuous if VO > VIN + 0.6V. |
| GND (Pin 2) | Power ground reference | Low-impedance return path for load and quiescent current; must connect to solid ground plane for thermal and noise performance. |
| EN (Pin 3) | Active-high enable input | TTL/CMOS compatible; drives high (>2.2V) for regulation, low (<0.8V) for shutdown; no VIN clamp diode allows independent voltage sequencing. |
| N/C (Pin 4) | No-connect terminal | Internally unconnected; must be left open or tied to Pin 3 (EN) per datasheet guidance-no routing or loading permitted. |
| VO (Pin 5) | Regulated output | Delivers 2.5V ±2%; stable with ≥1µF ceramic capacitor; ESR < 0.5Ω recommended for optimal transient response. |
Key Features
| Feature | Design Value |
|---|---|
| No-load stability | Maintains regulation with zero output current-enables direct use in CMOS RAM backup without dummy load. |
| Ultra-low noise | 50µVRMS output noise without bypass capacitor; eliminates need for secondary LDO or RC filter in sensitive analog paths. |
| Thermal & current protection | Integrated shutdown at 125°C and current limit (min 160mA, max 800mA); survives indefinite output short to GND or VO. |
| Capacitor flexibility | Stable with 1µF X7R ceramic, tantalum, or polymer output caps-no ESR minimum required, simplifying BOM and layout. |
Applications
| Portable Medical Sensors | Wireless Headset Audio Bias |
|---|---|
Use Scenario: Powering ultra-low-power pulse oximeter analog front-end and ADC in coin-cell–powered wearable patch. IC Role / Device Role / Timing Role: Primary 2.5V bias rail for op-amps and reference buffers; supplies regulated voltage during intermittent measurement bursts. Use Value: 50µA ground current extends 3V CR2032 battery life beyond 12 months; 85mV dropout enables operation down to 2.585V as battery discharges. |
Use Scenario: Providing clean 2.5V bias to MEMS microphone and Class-D headphone driver in Bluetooth earbud. IC Role / Device Role / Timing Role: Low-noise analog supply isolated from noisy digital core; enabled only during audio playback via MCU GPIO. Use Value: 50µVRMS noise prevents audible hiss; <1µA shutdown current preserves battery between calls; SC70-5 footprint saves critical PCB area. |
| Industrial Handheld Scanners | Smart Meter Real-Time Clock |
Use Scenario: Regulating 2.5V for laser diode driver and image sensor interface in battery-operated barcode scanner. IC Role / Device Role / Timing Role: Main analog supply with fast load transient response; EN controlled by scan trigger signal. Use Value: 1µF ceramic stability eliminates need for larger caps; thermal shutdown prevents damage during extended scanning in hot environments. |
Use Scenario: Backing up RTC and SRAM in utility smart meter during main power failure using supercapacitor or coin cell. IC Role / Device Role / Timing Role: Always-on 2.5V rail with no-load regulation; maintains timekeeping and memory state indefinitely. Use Value: No-load stability eliminates leakage concerns; ±2% accuracy ensures timekeeping drift < 2ppm/°C; 50µA current minimizes backup energy draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7115-25SEG-7 | 2.5V output, 180mV dropout at 50mA, 65µA ground current, SOT23-5 package. | Higher dropout and ground current; requires larger PCB area than SC70-5. | Preferred when higher thermal margin is needed (450mW PD) and board space permits SOT23-5. |
| AP2125KS-2.5TRG1 | 2.5V output, 250mV dropout at 50mA, 60µA ground current, SOT23-5 package, built-in soft-start. | Higher dropout degrades efficiency at low VIN; soft-start adds 1ms delay but reduces inrush. | Chosen where inrush current control is critical and SC70-5 size constraint is relaxed. |
Compared with ZXCL250H5TA, AP7115-25SEG-7 offers better thermal dissipation but sacrifices 95mV dropout and 15µA ground current; AP2125KS-2.5TRG1 adds soft-start at cost of 165mV higher dropout-making ZXCL250H5TA optimal for space- and efficiency-critical battery systems.
Availability
ZXCL250H5TA is available at Aetrix Electronics and suitable for portable medical sensors, wireless headset audio bias, industrial handheld scanners, and smart meter real-time clock circuits requiring stable component supply across long-lifecycle consumer and industrial programs.
Supply support for ZXCL250H5TA 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The ZXCL series targets space-constrained, battery-powered systems demanding micropower operation, ultra-small packaging, and robust protection-designed specifically for portable consumer, medical, and industrial edge devices.
FAQ
What is the minimum input voltage required for regulation at 2.5V output?
The ZXCL250H5TA begins regulating when VIN exceeds ~1.3V, but for reliable operation, VIN must be ≥ VOUT + 0.5V = 3.0V. At 50mA load, 85mV dropout means regulation holds down to VIN = 2.585V-however, datasheet specifies VIN(min) > 3.0V to ensure stability across temperature and tolerance.
Can Pin 4 (N/C) be used as a second ground connection?
No. Pin 4 is internally unconnected and must remain floating or tied to Pin 3 (EN) per datasheet guidance. Using it as ground creates undefined behavior, risks internal damage, and violates qualification testing-no electrical or thermal benefit is provided.
Is an input capacitor required for stable operation?
An input capacitor is not mandatory for stability but is strongly recommended: a 1µF ceramic capacitor placed close to VIN/GND pins improves PSRR, suppresses supply noise, and prevents oscillation during fast load transients-especially when sourced from high-impedance batteries or switching regulators.
How does thermal shutdown behave during sustained overload?
When junction temperature reaches 125°C, the device shuts down output and enters thermal cycling mode: it remains off until temperature drops sufficiently, then re-enables. This repeats continuously until the overload (e.g., excessive VIN–VOUT differential or ambient heat) is removed-preventing permanent damage without external intervention.
ZXCL250H5TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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):
- 0.325V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- 120 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
ZXCL250H5TA FAQ
1.How can I place an order for ZXCL250H5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCL250H5TA 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 ZXCL250H5TA reliable?
The price and inventory of ZXCL250H5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCL250H5TA is usually 5 days.
3.What payment methods are accepted for ZXCL250H5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCL250H5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCL250H5TA?
ZXCL250H5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCL250H5TA 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 ZXCL250H5TA?
For technical support, including ZXCL250H5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCL250H5TA requirements.
6.How does Aetrix verify that ZXCL250H5TA is sourced from the original manufacturer or authorized distributors?
All ZXCL250H5TA 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 ZXCL250H5TA meets industry standards.
7.What is the process for return or replacement of ZXCL250H5TA?
All ZXCL250H5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCL250H5TA, 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 ZXCL250H5TA part is unused and in its original packaging.
Return procedure for ZXCL250H5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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