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Diodes Incorporated AP7333-28SRG-7
- Part No.:
- AP7333-28SRG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7333-28SRG-7.pdf
- Description:
- IC REG LIN 2.8V 300MA SOT23R-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,731
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Product details
Overview
AP7333-28SRG-7 from Diodes Incorporated is a 300mA fixed-output (2.8V) low-dropout linear regulator in SOT23R package, featuring 65µA quiescent current, 300mV typical dropout at full load, and stability with 1µF ceramic output capacitor. It delivers fast transient response and robust protection for battery-powered wireless LAN cards and XDSL routers.
For engineers reviewing the AP7333-28SRG-7 datasheet, AP7333-28SRG-7 pinout, AP7333-28SRG-7 application, or AP7333-28SRG-7 equivalent, key selection criteria include dropout voltage at 300mA, PSRR at 100Hz, thermal shutdown threshold, start-up time, and compatibility with low-ESR ceramic capacitors in space-constrained portable designs.
Technical Context
The AP7333-28SRG-7 integrates a PMOS pass element, precision band-gap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown). Its architecture enables ultra-low IQ across 0–300mA load while maintaining regulation under fast line/load transients.
Designed for single-supply systems with input range 2V–6V, it operates without minimum load and supports stable regulation with 1µF–4.7µF X7R/X5R output capacitors. The SOT23R pinout (IN=Pin3, GND=Pin1, OUT=Pin2) differs from SOT23, requiring layout verification per AP02001 pad guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% over -40°C to +85°C ambient - ensures stable core voltage for 2.8V I/O rails in notebooks and peripherals. |
| Max Output Current | 300mA continuous - sufficient for powering Wi-Fi baseband ICs or USB controller logic without derating at 85°C. |
| Dropout Voltage | 300mV typical at 300mA - enables operation from 3.1V input (e.g., single Li-ion cell post-regulation) while sustaining 2.8V output. |
| Quiescent Current | 65µA typical at full load - minimizes standby power loss in always-on wireless modules, extending battery life in portable equipment. |
| PSRR | 65dB typical at 100Hz - suppresses low-frequency ripple from switching DC/DC stages upstream, critical for noise-sensitive RF sections. |
| Start-up Time | 80µs - allows rapid wake-up from deep sleep in GSM/TDMA systems where baseband ICs toggle between 100µA and 100mA loads every 4.6ms. |
| Thermal Shutdown | 140°C junction threshold with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking in compact SOT23R layouts. |
Pinout & Package
AP7333-28SRG-7 is housed in a RoHS-compliant, lead-free SOT23R package (2.9mm × 1.6mm × 1.1mm), optimized for thermal performance on FR-4 PCBs with 2oz copper and Diodes' recommended pad layout (AP02001).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (GND) | Ground reference | Primary return path for all internal circuits; must connect to low-impedance ground plane to ensure PSRR and transient stability. |
| Pin 2 (OUT) | Regulated output | Delivers 2.8V to load; requires 1µF ceramic capacitor placed within 2mm of this pin and GND to control undershoot/overshoot during 0–300mA load steps. |
| Pin 3 (IN) | Input supply | Accepts 2V–6V; bypassed with ≥1µF ceramic capacitor near pin to suppress high-frequency noise and sustain regulation during input dips. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65µA across full 0–300mA load range - reduces no-load power loss by >5× vs standard LDOs, enabling multi-year battery life in IoT sensors. |
| Fast transient response | Stable output during 0→300mA load steps with <50mV undershoot - eliminates reset events in DSPs and GSM baseband ICs during burst transmission. |
| Low-ESR capacitor support | Stable with 1µF X7R ceramic (10–200mΩ ESR) - eliminates need for bulk tantalum or aluminum electrolytic, saving board area and cost. |
| Integrated protection | Current limit (400–600mA), short-circuit clamp (100mA), and thermal shutdown (140°C) - removes need for external fault management circuitry in space-limited designs. |
Applications
| Wireless LAN Cards | XDSL Routers |
|---|---|
Use Scenario: Powering 2.8V RF transceiver and MAC controller in mini-PCIe WLAN modules. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying noise-sensitive RF front-end and digital baseband logic. Use Value: 65dB PSRR at 100Hz and fast transient response prevent RF desense and packet errors during simultaneous transmit/receive bursts. | Use Scenario: Regulating 2.8V supply for ADSL line driver and PHY interface in residential gateways. IC Role / Device Role / Timing Role: Secondary LDO delivering clean, stable voltage to analog line driver circuitry. Use Value: 300mV dropout enables use of 3.3V intermediate rail, reducing heat dissipation vs higher-dropout alternatives in thermally constrained plastic enclosures. |
| Notebook Keyboard/Touchpad | Battery-Powered Test Equipment |
Use Scenario: Supplying 2.8V to capacitive touch controller and microcontroller in ultra-thin notebook peripherals. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time wake detection during system suspend. Use Value: 65µA IQ extends battery runtime during multi-day idle periods without compromising wake latency (80µs start-up). | Use Scenario: Powering 2.8V ADC reference and signal conditioning circuitry in handheld multimeters. IC Role / Device Role / Timing Role: Precision voltage source for analog measurement subsystem requiring low-noise, stable bias. Use Value: ±2% output accuracy and <0.2%/V line regulation ensure measurement repeatability across varying battery voltage (3.0–4.2V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250mA max output, 1.6µA IQ, 600mV dropout at 250mA | Limited to lower-current peripherals; superior IQ but higher dropout limits input headroom | Select when ultra-low standby power dominates over load capability and input voltage margin is ample. |
| Torex XC6206P282MR-G | 300mA max, 12µA IQ, 400mV dropout at 300mA, SOT23-3 pinout matches AP7333-SR | Lower IQ improves battery life, but reduced PSRR (55dB @100Hz) may require additional filtering in RF designs | Choose for cost-sensitive, non-RF applications where minimal IQ outweighs PSRR requirements. |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the AP7333-28SRG-7 uniquely balances 300mA drive, 65µA IQ, 65dB PSRR, and SOT23R footprint-making it optimal for RF-adjacent loads where both current delivery and noise rejection are critical.
Availability
AP7333-28SRG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and notebook keyboard/trackpad modules requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for AP7333-28SRG-7 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-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7333 belongs to Diodes' low-dropout linear regulator product line, engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current, fast transient response, and robust fault protection in miniature packages.
FAQ
What is the maximum input voltage rating for AP7333-28SRG-7?
The absolute maximum input voltage is 7V, but the recommended operating range is 2V to 6V. Exceeding 6V risks violating safe operating area limits, especially under high ambient temperature or heavy load conditions where power dissipation increases. Operation above 6V voids guaranteed specifications and may trigger thermal shutdown prematurely.
Can AP7333-28SRG-7 operate without an output capacitor?
No - an output capacitor is mandatory for stability. The device requires a minimum 1µF X7R or X5R ceramic capacitor (10–200mΩ ESR) placed adjacent to the OUT and GND pins. Omitting it causes oscillation and unregulated output, potentially damaging downstream circuitry. No-load stability is maintained only when the capacitor is present.
How does the SOT23R package differ electrically from SOT23 for AP7333?
SOT23R has identical electrical characteristics but reversed pinout: IN=Pin3, GND=Pin1, OUT=Pin2 versus SOT23's IN=Pin1, GND=Pin3, OUT=Pin2. This affects PCB layout and cannot be interchanged without redesign. Thermal resistance is slightly higher (230°C/W vs 207°C/W), requiring careful attention to copper pour and airflow in high-power applications.
Is AP7333-28SRG-7 qualified for automotive applications?
No - it is specified for industrial temperature range (-40°C to +85°C) and lacks AEC-Q100 qualification, automotive-grade screening, or extended temperature support. For automotive infotainment or telematics, Diodes' AP7361 series (AEC-Q100 Grade 2, -40°C to +105°C) is the designated alternative with matching 2.8V output and SOT23R packaging.
AP7333-28SRG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 65dB (100Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
AP7333-28SRG-7 FAQ
1.How can I place an order for AP7333-28SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7333-28SRG-7 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 AP7333-28SRG-7 reliable?
The price and inventory of AP7333-28SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-28SRG-7 is usually 5 days.
3.What payment methods are accepted for AP7333-28SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-28SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7333-28SRG-7?
AP7333-28SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7333-28SRG-7 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 AP7333-28SRG-7?
For technical support, including AP7333-28SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-28SRG-7 requirements.
6.How does Aetrix verify that AP7333-28SRG-7 is sourced from the original manufacturer or authorized distributors?
All AP7333-28SRG-7 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 AP7333-28SRG-7 meets industry standards.
7.What is the process for return or replacement of AP7333-28SRG-7?
All AP7333-28SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-28SRG-7, 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 AP7333-28SRG-7 part is unused and in its original packaging.
Return procedure for AP7333-28SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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