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Diodes Incorporated AP7333-33SAG-7
- Part No.:
- AP7333-33SAG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7333-33SAG-7.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:21,990
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Product details
Overview
AP7333-33SAG-7 from Diodes Incorporated is a 300mA fixed-output (3.3V) low-dropout linear regulator in SOT23 package, featuring 65µA quiescent current, 300mV dropout at full load, and 65dB PSRR at 100Hz - designed for battery-powered wireless LAN cards and XDSL routers requiring stable low-power voltage regulation.
For engineers reviewing the AP7333-33SAG-7 datasheet, AP7333-33SAG-7 pinout, AP7333-33SAG-7 application, or AP7333-33SAG-7 equivalent, key selection criteria include dropout voltage under 300mA load, stability with 1µF ceramic output capacitor, thermal shutdown threshold at 140°C, and SOT23 pin compatibility with IN/OUT/GND routing.
Technical Context
The AP7333-33SAG-7 integrates a band-gap reference, error amplifier, and PMOS pass element to deliver precise 3.3V regulation across 2V–6V input range. Its internal current-limit (400–600mA) and short-circuit protection (100mA clamp) operate independently of external components.
Thermal shutdown activates at 140°C with 15°C hysteresis, enabling safe auto-recovery under overload. Fast transient response (80µs start-up, minimal undershoot/overshoot) is achieved via optimized internal compensation, eliminating need for external capacitors beyond 1µF ceramic on IN and OUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% over -40°C to +85°C ambient - ensures reliable logic-level supply for 3.3V I/O interfaces. |
| Max Output Current | 300mA continuous - supports moderate-power peripherals like WLAN baseband ICs without derating. |
| Dropout Voltage | 300mV typical at 300mA - enables operation down to 3.6V input while maintaining 3.3V output, critical for single-cell Li-ion systems. |
| Quiescent Current | 65µA typical across full load and input range - minimizes standby power loss in always-on portable devices. |
| 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 modes in battery-powered edge sensors. |
| Stability | Guaranteed with 1µF X7R/X5R ceramic output capacitor - reduces BOM count and PCB area vs. electrolytic alternatives. |
Pinout & Package
SOT23-3 package with gull-wing leads, RoHS-compliant lead-free finish, and green molding compound (no Br/Sb). Thermal resistance θJA = 207°C/W on FR-4 with minimum pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2V–6V; requires ≥1µF ceramic bypass to GND close to pin for noise immunity and stability. |
| OUT (Pin 2) | Regulated output | Delivers 3.3V ±2%; stable with 1–4.7µF ceramic capacitor (ESR 10–200mΩ) placed adjacent to pin. |
| GND (Pin 3) | Power ground reference | Common return path for IN and OUT; must connect to low-impedance ground plane to maintain PSRR and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65µA across full input (2–6V) and load (0–300mA) range - extends battery runtime in IoT endpoints. |
| Fast transient response | Controlled overshoot/undershoot during 0→300mA load steps - prevents logic glitches in GSM/TDMA baseband circuits. |
| Integrated protection | Current limit (≈600mA), short-circuit clamp (≈100mA), and thermal shutdown (140°C/125°C hysteresis) - eliminates need for external fault management circuitry. |
| No minimum load requirement | Stable regulation at 0mA output - simplifies design for intermittently active subsystems like BLE radios. |
Applications
| Wireless LAN Cards | XDSL Routers |
|---|---|
Use Scenario: Powering 802.11a/b/g/n RF transceivers and MAC controllers in compact client adapters. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying digital baseband and analog front-end sections. Use Value: 65µA IQ and fast transient response prevent brownouts during burst-mode packet transmission. | Use Scenario: Regulating 3.3V rail for ADSL2+ PHY and embedded processor in residential gateways. IC Role / Device Role / Timing Role: Post-regulator after wide-input DC/DC converter, providing clean, low-noise supply. Use Value: 65dB PSRR at 100Hz suppresses switching noise from upstream buck converter, ensuring DSL line stability. |
| Battery-Powered Sensors | Notebook Peripherals |
Use Scenario: Supplying ultra-low-power microcontrollers and environmental sensors in industrial wireless nodes. IC Role / Device Role / Timing Role: Standby-mode LDO maintaining real-time clock and wake-up circuitry. Use Value: No minimum load requirement and 65µA IQ enable multi-year operation on coin-cell batteries. | Use Scenario: Powering USB 2.0 hub controllers and touchpad ASICs in thin-and-light notebooks. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling high-speed digital I/O rails. Use Value: 80µs start-up time synchronizes with system suspend/resume sequences without timing violations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | 250mA max output, 1.6µA IQ, 600mV dropout at 250mA | Limited to lower-current loads; superior IQ for ultra-long-life applications | Select when standby current <2µA is mandatory and load ≤250mA |
| TPS7333QDBVRQ1 | 300mA, 250µA IQ, 350mV dropout at 300mA, AEC-Q100 qualified | Automotive-grade qualification; higher IQ but tighter VOUT tolerance (±1%) | Select for automotive infotainment modules requiring temperature-rated reliability |
Compared with MCP1700-3302E/TO and TPS7333QDBVRQ1, the AP7333-33SAG-7 balances ultra-low IQ (65µA), adequate current (300mA), and cost-effective SOT23 packaging - making it optimal for consumer-grade portable networking equipment where thermal margin and BOM simplicity are prioritized over automotive qualification or sub-µA standby.
Availability
AP7333-33SAG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and battery-powered sensors requiring stable component supply with consistent parametric performance and long-term lifecycle support.
Supply support for AP7333-33SAG-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 communications markets.
The AP7333 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for energy-constrained portable and networking applications where extended battery life, fast dynamic response, and minimal external components are essential design requirements.
FAQ
What is the maximum input voltage rating for AP7333-33SAG-7?
The absolute maximum input voltage is 7V, but the recommended operating range is 2V to 6V. Exceeding 6V risks violating thermal limits under full load due to increased power dissipation - especially in SOT23 package with θJA = 207°C/W. Operation above 6V is not guaranteed per datasheet specifications.
Can AP7333-33SAG-7 operate without an output capacitor?
No - a minimum 1µF ceramic output capacitor is required for stability and transient response. The device is not stable without it, and omitting the capacitor causes oscillation or unregulated output. The datasheet explicitly states stability is guaranteed only with 1–4.7µF X7R/X5R ceramic capacitors having ESR between 10mΩ and 200mΩ.
Does AP7333-33SAG-7 require a minimum load current to maintain regulation?
No - the AP7333-33SAG-7 maintains stable 3.3V regulation with zero load current. This is confirmed in the "No Load Stability" section of the datasheet, which states the device remains regulated and stable even when output current is 0mA, eliminating need for bleed resistors in low-power sleep modes.
How does thermal shutdown behave under sustained overload?
When junction temperature reaches ~140°C, thermal shutdown disables the output; recovery occurs at ~125°C due to 15°C hysteresis. Under continuous overload, this causes cycling - ON/OFF toggling - which limits average power dissipation and prevents permanent damage, though it results in intermittent output voltage.
AP7333-33SAG-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):
- 3.3V
- 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
AP7333-33SAG-7 FAQ
1.How can I place an order for AP7333-33SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7333-33SAG-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 AP7333-33SAG-7 reliable?
The price and inventory of AP7333-33SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-33SAG-7 is usually 5 days.
3.What payment methods are accepted for AP7333-33SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-33SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7333-33SAG-7?
AP7333-33SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7333-33SAG-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 AP7333-33SAG-7?
For technical support, including AP7333-33SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-33SAG-7 requirements.
6.How does Aetrix verify that AP7333-33SAG-7 is sourced from the original manufacturer or authorized distributors?
All AP7333-33SAG-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 AP7333-33SAG-7 meets industry standards.
7.What is the process for return or replacement of AP7333-33SAG-7?
All AP7333-33SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-33SAG-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 AP7333-33SAG-7 part is unused and in its original packaging.
Return procedure for AP7333-33SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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