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Diodes Incorporated ZXCL280H5TA
- Part No.:
- ZXCL280H5TA
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ZXCL280H5TA.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,610
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Product details
Overview
ZXCL280H5TA from Diodes Incorporated is a 2.8V 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 ZXCL280H5TA datasheet, ZXCL280H5TA pinout, ZXCL280H5TA application, or ZXCL280H5TA equivalent, key selection criteria include dropout voltage under 100mA load, enable logic compatibility (TTL/CMOS), thermal shutdown threshold (125°C), output noise (50µVRMS), and SC70-5 footprint constraints in space-constrained designs.
Technical Context
The ZXCL280H5TA employs a PMOS pass transistor architecture enabling low dropout and minimal ground current across operating conditions-including startup, dropout, and full 150mA load. Its internal bandgap reference and error amplifier maintain ±2% output voltage accuracy over temperature and line/load variations.
Enable functionality uses a hysteresis-enabled TTL/CMOS-compatible input (VENH ≥ 2.2V, VENL ≤ 0.8V) to achieve <1µA shutdown supply current. Thermal overload protection activates at 125°C junction temperature and cycles until fault removal, while current limiting operates between 160mA and 800mA depending on device variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V ±2% - tightly regulated nominal output with no external resistor network required |
| Dropout Voltage | 85mV at 50mA - enables operation with VIN as low as 2.885V while maintaining regulation |
| Ground Current | 50µA at 150mA load - minimizes total system power loss in battery-critical applications |
| Shutdown Current | 1µA typical - reduces standby power to near-zero when EN = 0V |
| PSRR | 70dB at 1kHz - suppresses input ripple without requiring large input capacitance |
| Output Noise | 50µVRMS (10Hz–100kHz) - suitable for noise-sensitive analog circuitry without bypass capacitor |
| Thermal Shutdown | 125°C activation - protects against sustained overloads without external circuitry |
Pinout & Package
Package: SC70-5 / SOT353 (H5), 1.3mm × 2.1mm × 0.95mm body, 0.65mm pitch, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.0V–5.5V input; internal diode anode tied to VO limits reverse current to 5mA continuous |
| GND | Power ground reference | Low-impedance return path for load and bias currents; critical for PSRR and noise performance |
| N/C | No-connect terminal | Must be left open or connected to GND per datasheet; not internally bonded in ZXCL280H5TA |
| VO | Regulated output | Delivers 2.8V ±2%; stable with ≥1µF ceramic output capacitor (X7R dielectric recommended) |
| EN | Active-high enable input | TTL/CMOS compatible; drives high (>2.2V) for regulation, low (<0.8V) for shutdown mode |
Key Features
| Feature | Design Value |
|---|---|
| No-load stability | Maintains regulation with zero output current-enables direct use with CMOS RAM or sleep-mode microcontrollers |
| Ultra-small footprint | SC70-5 package occupies 50% less PCB area than SOT23 regulators-ideal for PDA, camera modules, and PC cards |
| Low-noise operation | 50µVRMS output noise without bypass capacitor-eliminates need for secondary filtering in audio/sensor signal chains |
| Robust protection | Integrated thermal shutdown and current limit (160–800mA range)-prevents damage during short-circuit or overtemperature events |
| Wide input range | Operates from 2.0V to 5.5V input-supports single-cell Li-ion, dual-cell alkaline, or USB-powered systems |
Applications
| Cellular & Cordless Phones | Handheld Instruments |
|---|---|
Use Scenario: Powering baseband processor I/O rails and RF front-end bias in compact mobile handsets. IC Role / Device Role / Timing Role: Primary LDO supplying 2.8V to low-power logic and analog subsystems with fast load transient response. Use Value: 85mV dropout extends battery runtime by enabling operation down to 2.885V input; 50µA ground current preserves standby time. | Use Scenario: Regulating sensor interface and display driver supplies in portable multimeters and thermal imagers. IC Role / Device Role / Timing Role: Fixed-output voltage source for precision ADC reference buffers and OLED bias circuits. Use Value: ±2% output accuracy and 50µVRMS noise ensure measurement integrity without post-regulation filtering. |
| Camera & Camcorder Modules | PC Cards & Portable Storage |
Use Scenario: Supplying image sensor analog core and autofocus motor drivers in ultra-thin digital cameras. IC Role / Device Role / Timing Role: Low-noise, enable-controlled power rail for CMOS image sensor analog blocks during capture bursts. Use Value: Active-high EN allows synchronized power-up with sensor initialization; SC70-5 footprint fits tight module layouts. | Use Scenario: Providing clean 2.8V supply to flash memory controllers and card interface logic in PCMCIA/ExpressCard devices. IC Role / Device Role / Timing Role: Standby-capable LDO supporting hot-plug insertion and low-power suspend/resume cycles. Use Value: <1µA shutdown current meets PC Card power budget requirements; no-load stability prevents brownout during idle states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7115-28SEG-7 | 2.8V output, 150mA max, 120mV dropout @ 100mA, 25µA quiescent current, SOT23-5 package | Higher dropout and larger footprint; lacks N/C pin but offers tighter initial accuracy (±1%) | Select when lower quiescent current outweighs dropout penalty and board space permits SOT23-5 |
| AP2125KS-2.8TRG1 | 2.8V output, 300mA max, 220mV dropout @ 150mA, 65µA quiescent current, SOT23-5 package | Higher current capability and thermal robustness, but higher ground current and larger size | Select when >150mA load or enhanced thermal margin is required despite increased quiescent draw |
Compared with ZXCL280H5TA, AP7115-28SEG-7 trades 35mV higher dropout for 25µA lower quiescent current and ±1% accuracy, while AP2125KS-2.8TRG1 provides +150mA headroom at the cost of +15µA ground current and +135mV dropout-making ZXCL280H5TA optimal for ultra-low-power, space-constrained 150mA applications.
Availability
ZXCL280H5TA is available at Aetrix Electronics and suitable for cellular phones, handheld instruments, camera modules, and PC cards requiring stable component supply with long-term lifecycle visibility.
Supply support for ZXCL280H5TA 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The ZXCL series was designed specifically for space-constrained, battery-powered portable electronics-emphasizing micropower operation, SC70 packaging, and no-load stability without external compensation.
FAQ
What is the minimum input voltage required for ZXCL280H5TA to regulate 2.8V output?
The datasheet specifies that normal operation requires VIN > VOUT(nom) + 0.5V, so minimum input is 3.3V. However, regulation begins when VIN exceeds ~1.3V, and the device maintains output down to 2.885V input (2.8V + 85mV dropout) at 50mA load-critical for extending battery life in single-cell systems.
Can ZXCL280H5TA operate without an output capacitor?
No. While the device is stable with no external load, an output capacitor ≥1µF (ceramic, X7R dielectric) is mandatory for stability across all load conditions. Omitting it risks oscillation, poor transient response, and failure to meet PSRR/noise specifications-even though the part is "no-load stable."
Is the N/C pin on ZXCL280H5TA electrically connected internally?
No. Pin 4 (N/C) is not bonded to any internal circuitry in the ZXCL280H5TA. The datasheet explicitly states it "should be left open circuit or connected to pin 3" (GND), confirming it is unconnected-unlike some variants where it may route to internal nodes. PCB layout must treat it as floating or grounded, never driven.
Does ZXCL280H5TA support reverse current protection?
It provides limited reverse current protection via an inherent internal diode (anode to VO, cathode to VIN), which conducts if VO exceeds VIN by >0.6V. However, this diode is rated only for 5mA continuous / 30mA peak-so external Schottky protection is required in applications where reverse current could exceed those limits, such as hot-swap or back-drive scenarios.
ZXCL280H5TA 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.28V @ 100mA
- Current - Output:
- 150mA
- 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
ZXCL280H5TA FAQ
1.How can I place an order for ZXCL280H5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCL280H5TA 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 ZXCL280H5TA reliable?
The price and inventory of ZXCL280H5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCL280H5TA is usually 5 days.
3.What payment methods are accepted for ZXCL280H5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCL280H5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCL280H5TA?
ZXCL280H5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCL280H5TA 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 ZXCL280H5TA?
For technical support, including ZXCL280H5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCL280H5TA requirements.
6.How does Aetrix verify that ZXCL280H5TA is sourced from the original manufacturer or authorized distributors?
All ZXCL280H5TA 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 ZXCL280H5TA meets industry standards.
7.What is the process for return or replacement of ZXCL280H5TA?
All ZXCL280H5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCL280H5TA, 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 ZXCL280H5TA part is unused and in its original packaging.
Return procedure for ZXCL280H5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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