My Inquiry
My Account
Diodes Incorporated AP7333-28SAG-7
- Part No.:
- AP7333-28SAG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7333-28SAG-7.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,010
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7333-28SAG-7 from Diodes Incorporated is a 300mA fixed-output (2.8V) low-dropout linear regulator in SOT23 package, featuring 65µA quiescent current, 300mV dropout at full load, and 65dB PSRR at 100Hz. It delivers stable voltage to battery-powered wireless LAN cards and portable peripherals under fast load transients.
For engineers reviewing the AP7333-28SAG-7 datasheet, AP7333-28SAG-7 pinout, AP7333-28SAG-7 application, or AP7333-28SAG-7 equivalent, key selection criteria include dropout voltage at 300mA, stability with 1µF ceramic output capacitor, thermal shutdown threshold (140°C), and SOT23 pin compatibility with IN/OUT/GND assignments.
Technical Context
The AP7333-28SAG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown). Its architecture enables ultra-fast 80µs startup and excellent transient response without requiring minimum load.
It operates across 2V–6V input while maintaining ±2% output accuracy over –40°C to +85°C ambient. Built-in 10mΩ–200mΩ ESR tolerance ensures stability with low-ESR 1µF–4.7µF X7R/X5R ceramic capacitors on input and output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% - ensures precise biasing for 2.8V I/O rails in wireless modules |
| Max Output Current | 300mA - supports power delivery to baseband ICs and RF front-ends in compact devices |
| Quiescent Current | 65µA typical at full load - extends battery life in always-on sensor nodes and peripherals |
| Dropout Voltage | 300mV typical at 300mA - enables operation down to 3.1V input when powering 2.8V logic |
| PSRR | 65dB at 100Hz - suppresses low-frequency ripple from switching DC/DC stages upstream |
| Start-up Time | 80µs - allows rapid wake-up from deep sleep in GSM/TDMA systems |
| Thermal Shutdown | 140°C threshold with 15°C hysteresis - prevents latch-up during sustained high-power dissipation |
Pinout & Package
AP7333-28SAG-7 uses the SOT23-3 package (2.92mm × 1.3mm × 1.0mm), RoHS-compliant, green molding compound, with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2V–6V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin |
| 2 (OUT) | Regulated output | Delivers stable 2.8V; stable with 1µF–4.7µF X7R/X5R ceramic capacitor |
| 3 (GND) | Power ground reference | Return path for input/output currents; must connect to low-impedance PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Maintains regulation from 0mA to 300mA - eliminates need for dummy loads in standby mode |
| Fast transient response | Stable during 0→300mA load steps with minimal overshoot/undershoot - critical for GSM burst-mode operation |
| Short-circuit protection | Limits output current to ~100mA when VOUT < 200mV - prevents damage during board-level faults |
| Current limit protection | Clamps output at ~600mA - safeguards against overload while preserving thermal margin |
| Ultra-low IQ across input range | 55–85µA from 2V–6V input - enables consistent battery runtime regardless of cell voltage decay |
Applications
| Wireless LAN Modules | XDSL Router Power Rails |
|---|---|
Use Scenario: Powering 2.8V RF transceivers and baseband processors in mini-PCIe WLAN cards. IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise 2.8V supply with fast transient recovery during packet transmission bursts. Use Value: 65dB PSRR at 100Hz rejects noise from shared DC/DC converters; 80µs startup enables rapid channel-hopping synchronization. | Use Scenario: Supplying 2.8V PHY interface circuitry in ADSL/VDSL line cards with tight thermal constraints. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling high-speed analog front-end from noisy digital domains. Use Value: 300mV dropout allows operation from 3.3V rail with >0.5V headroom; thermal shutdown prevents failure during extended line diagnostics. |
| Battery-Powered Peripherals | Notebook Keyboard/Touchpad Subsystem |
Use Scenario: Regulating 2.8V for Bluetooth LE modules and environmental sensors in coin-cell–powered IoT nodes. IC Role / Device Role / Timing Role: Always-on LDO maintaining regulation during microamp-level sleep states and millisecond wake-ups. Use Value: 65µA quiescent current minimizes self-discharge; no minimum load requirement avoids wasted power in ultra-low-duty-cycle operation. | Use Scenario: Providing 2.8V to keyboard controller and capacitive touchpad ASIC in ultrabook designs. IC Role / Device Role / Timing Role: Secondary LDO supporting isolated I/O domain with independent enable control and fault isolation. Use Value: Short-circuit protection limits fault current to 100mA during accidental trace shorts; SOT23 footprint saves space in dense keyboard flex assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250mA max output, 1.6µA IQ, 600mV dropout at 250mA | Lower IQ but lower current capability; less suitable for 300mA burst loads | Select when ultra-low standby current dominates over peak load capacity |
| TPS73128DBVR | 300mA, 400µA IQ, 170mV dropout at 300mA, higher cost | Superior dropout and PSRR (70dB @100Hz), but 6× higher quiescent current | Select when input headroom is constrained below 3.0V and noise rejection is critical |
Compared with MCP1700T-2802E/TT and TPS73128DBVR, the AP7333-28SAG-7 uniquely balances 300mA capability, 65µA IQ, and 300mV dropout-making it optimal for space-constrained, battery-operated systems needing both burst-current support and multi-day standby life.
Availability
AP7333-28SAG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, XDSL router PHY rails, and battery-powered peripherals requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AP7333-28SAG-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.
The AP7333 belongs to Diodes' low-quiescent-current LDO portfolio, designed specifically for energy-sensitive portable and networking equipment where efficiency, small size, and robust transient performance are mandatory.
FAQ
What is the maximum input voltage rating for AP7333-28SAG-7?
The absolute maximum input voltage is 7V, but recommended operating range is 2V to 6V. Exceeding 6V risks accelerated degradation even if within absolute max ratings; operation above 6V voids parametric guarantees per datasheet Section 4.
Can AP7333-28SAG-7 operate without an output capacitor?
No. While stable with only 1µF ceramic, the device requires an output capacitor for loop stability and transient response. Omitting it causes oscillation and unregulated output; minimum 1µF X7R/X5R ceramic is mandatory per Application Note Section 9.
Does AP7333-28SAG-7 support adjustable output voltage?
No. It is a fixed 2.8V output device. The AP7333 family offers only factory-trimmed fixed outputs (1.0V–3.3V); no external feedback resistor network is supported. Adjustable variants require different part numbers like AP7340 series.
Is thermal shutdown reversible, and what is the hysteresis?
Yes. Thermal shutdown activates at ~140°C junction temperature and resets at ~125°C, providing 15°C hysteresis. This allows automatic recovery after cooling, but repeated cycling indicates inadequate PCB copper area or excessive ambient temperature beyond 85°C.
AP7333-28SAG-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:
- SOT-23-3
AP7333-28SAG-7 FAQ
1.How can I place an order for AP7333-28SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7333-28SAG-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 AP7333-28SAG-7 reliable?
The price and inventory of AP7333-28SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-28SAG-7 is usually 5 days.
3.What payment methods are accepted for AP7333-28SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-28SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7333-28SAG-7?
AP7333-28SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7333-28SAG-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 AP7333-28SAG-7?
For technical support, including AP7333-28SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-28SAG-7 requirements.
6.How does Aetrix verify that AP7333-28SAG-7 is sourced from the original manufacturer or authorized distributors?
All AP7333-28SAG-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 AP7333-28SAG-7 meets industry standards.
7.What is the process for return or replacement of AP7333-28SAG-7?
All AP7333-28SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-28SAG-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 AP7333-28SAG-7 part is unused and in its original packaging.
Return procedure for AP7333-28SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7333-28SAG-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
