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Diodes Incorporated AP7335A-50SN-7
- Part No.:
- AP7335A-50SN-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7335A-50SN-7.pdf
- Description:
- IC REG LINEAR 5V 300MA 6DFN2020
- Quantity:
- Payment:
- Shipping:
Inventory:4,226
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Product details
Overview
AP7335A-50SN-7 from Diodes Incorporated is a 300mA, 5.0V fixed-output low-dropout linear regulator with ±1% output accuracy, 150mV dropout at full load, 35μA quiescent current, and fast 220μs startup time. It operates across –40°C to +85°C ambient and integrates enable control, current limit, thermal shutdown, and short-circuit protection - designed for battery-powered portable electronics requiring stable, low-power voltage regulation.
For engineers reviewing the AP7335A-50SN-7 datasheet, AP7335A-50SN-7 pinout, AP7335A-50SN-7 application, or AP7335A-50SN-7 equivalent, key selection criteria include dropout voltage under 300mA load, PSRR of 65dB at 1kHz, compatibility with 1μF ceramic output capacitors, EN logic thresholds (VIH ≥ 1.4V, VIL ≤ 0.4V), and thermal resistance of 251°C/W in U-DFN2020-6.
Technical Context
The AP7335A-50SN-7 implements a PMOS pass transistor architecture enabling ultra-low quiescent current and fast transient response. Its internal band-gap reference and error amplifier deliver ±1% output voltage accuracy over temperature and line/load variations.
Enable functionality uses active-high logic with defined VIH (≥1.4V) and VIL (≤0.4V) thresholds; shutdown current is ≤1μA. Protection circuitry includes foldback current limiting (typ. 650mA), short-circuit clamping (~160mA), and thermal shutdown at +145°C with +15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - ensures stable MCU core/peripheral rail without external feedback network. |
| Max Output Current | 300mA continuous - supports moderate-power RF modules or display drivers in compact portable systems. |
| Dropout Voltage | 150mV at 300mA - enables operation from 5.5V input (e.g., single-cell Li-ion + LDO) while maintaining regulation. |
| Quiescent Current | 35μA typical - extends battery life in always-on sensor nodes or standby modes of Bluetooth headsets. |
| PSRR | 65dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Start-up Time | 220μs - allows rapid power sequencing for DSP wake-up in GSM/TDMA burst-mode applications. |
| Thermal Shutdown | +145°C threshold with +15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP7335A-50SN-7 is packaged in U-DFN2020-6 - a 2.0mm × 2.0mm, 0.65mm pitch, thermally enhanced leadless package with exposed thermal pad. Pin 2 is GND; Pin 1 is EN; Pin 3 is IN; Pin 4 is OUT; Pins 5 and 6 are NC (no connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 3) | Input voltage supply | Accepts 5.5–6.0V input; requires ≥1μF ceramic bypass capacitor placed adjacent to minimize noise coupling. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, and EN; must connect directly to thermal pad and low-impedance ground plane. |
| EN (Pin 1) | Enable control input | Active-high logic interface; drives regulator ON when ≥1.4V, OFF when ≤0.4V; <1μA leakage in shutdown. |
| OUT (Pin 4) | Regulated 5.0V output | Delivers up to 300mA; stable with ≥1μF ceramic capacitor (ESR >15mΩ); no minimum load required. |
| NC (Pins 5, 6) | No connection | Internally unconnected; must remain floating or grounded per layout guidelines - not used for thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 150mV at 300mA enables use with marginal input margins (e.g., aging batteries or post-DC/DC ripple). |
| Fast transient response | Stable 5.0V output during 10mA→300mA load steps - critical for GSM baseband ICs with 12.5% duty cycle. |
| Ultra-low IQ | 35μA quiescent current minimizes standby power loss - essential for multi-week battery life in wearables. |
| Integrated protections | Current limit (650mA), short-circuit clamp (160mA), and thermal shutdown (+145°C) eliminate need for external fault management. |
| Small-footprint packaging | U-DFN2020-6 occupies only 4mm² PCB area - ideal for space-constrained mobile devices like Bluetooth headsets. |
Applications
| Smartphones | Bluetooth Headsets |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails during TDMA transmit/receive bursts. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO supplying clean 5.0V to GSM chipset peripherals. Use Value: 220μs startup and 65dB PSRR prevent voltage droop/noise injection during 577μs GSM time slots. |
Use Scenario: Regulating audio codec and Bluetooth radio supply in compact ear-worn form factors. IC Role / Device Role / Timing Role: Enable-controlled 5.0V source managing power states between call and idle modes. Use Value: 35μA IQ extends single-charge battery runtime beyond 10 hours; U-DFN2020-6 fits tight acoustic cavity layouts. |
| MP3/MP4 Players | Battery Chargers (USB-PD Input Stage) |
|
Use Scenario: Supplying NAND flash controller and DAC in portable media players. IC Role / Device Role / Timing Role: Fixed-output LDO decoupling noisy USB-derived 5V input for analog audio paths. Use Value: 1μF ceramic stability eliminates need for bulky tantalum caps; ±1% accuracy ensures consistent DAC reference. |
Use Scenario: Generating auxiliary 5.0V rail for charger microcontroller and status LEDs from variable USB-PD input. IC Role / Device Role / Timing Role: Post-regulator stabilizing switched 5V output before system monitoring circuits. Use Value: 150mV dropout accommodates USB-PD's 5.0±0.5V tolerance; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ, fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/TT (Microchip) | 250mA max output, 6μA IQ, SOT23-5 package, 170mV dropout at 250mA | Limited current headroom for 300mA peak loads; lower IQ benefits ultra-long-life coin-cell designs | Select when <250mA load and sub-10μA IQ dominate; avoid if 300mA burst current is required. |
| Torex XC6206P502MR-G (Torex) | 300mA output, 1.0% accuracy, 180mV dropout at 300mA, 12μA IQ, SOT25 package | Higher dropout limits use with weak input sources; smaller SOT25 footprint vs. U-DFN2020-6 | Prefer for cost-sensitive SMT lines using legacy SOT25 tooling; accept higher dropout for reduced BOM count. |
Compared with MCP1700T-5002E/TT and XC6206P502MR-G, the AP7335A-50SN-7 uniquely balances 300mA capability, 150mV dropout, and 35μA IQ in a 2×2mm DFN - making it optimal for space-constrained, battery-fed systems needing both current headroom and efficiency.
Availability
AP7335A-50SN-7 is available at Aetrix Electronics and suitable for smartphone baseband power, Bluetooth headset audio subsystems, MP3 player NAND controllers, and USB-PD auxiliary rail generation requiring stable component supply, RoHS-compliant packaging, and lifecycle continuity.
Supply support for AP7335A-50SN-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 consumer, industrial, and automotive markets.
The AP7335A series targets portable electronics requiring ultra-low IQ, fast transient response, and small-footprint LDOs - specifically engineered for battery-powered devices where efficiency, size, and reliability are co-prioritized.
FAQ
What is the minimum input voltage required for AP7335A-50SN-7 to maintain 5.0V output at 300mA?
The minimum input voltage is 5.5V, derived from the 150mV dropout specification at 300mA load plus the 5.0V nominal output. Below 5.5V, the device enters dropout and cannot regulate - confirmed by Electrical Characteristics table Note 6 and Absolute Maximum Ratings section.
Can AP7335A-50SN-7 operate without an output capacitor?
No - a minimum 1μF ceramic output capacitor is required for stability, as stated in the Application Note and Functional Block Diagram sections. Omitting it risks oscillation or excessive overshoot during load transients, verified by stability region plots in Figures 7–9 of DS38527 Rev. 1-2.
Is the EN pin internally pulled up or down?
The EN pin has no internal pull-up or pull-down; it is a high-impedance CMOS input with leakage current ≤1μA. External biasing is mandatory - tie to IN for always-on operation or drive actively with logic-level signals meeting VIH ≥1.4V and VIL ≤0.4V thresholds.
How does thermal shutdown behave under sustained overload?
When junction temperature reaches +145°C, output disables; it re-enables only after cooling to ~+130°C due to +15°C hysteresis. Under continuous overload, this causes on/off cycling - validated by Thermal Shutdown Protection description on page 7 and absolute maximum ratings table.
AP7335A-50SN-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2020-6
AP7335A-50SN-7 FAQ
1.How can I place an order for AP7335A-50SN-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7335A-50SN-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 AP7335A-50SN-7 reliable?
The price and inventory of AP7335A-50SN-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7335A-50SN-7 is usually 5 days.
3.What payment methods are accepted for AP7335A-50SN-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7335A-50SN-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7335A-50SN-7?
AP7335A-50SN-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7335A-50SN-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 AP7335A-50SN-7?
For technical support, including AP7335A-50SN-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7335A-50SN-7 requirements.
6.How does Aetrix verify that AP7335A-50SN-7 is sourced from the original manufacturer or authorized distributors?
All AP7335A-50SN-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 AP7335A-50SN-7 meets industry standards.
7.What is the process for return or replacement of AP7335A-50SN-7?
All AP7335A-50SN-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7335A-50SN-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 AP7335A-50SN-7 part is unused and in its original packaging.
Return procedure for AP7335A-50SN-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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