My Inquiry
My Account
Diodes Incorporated AP7335A-33W5-7
- Part No.:
- AP7335A-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7335A-33W5-7.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:558
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7335A-33W5-7 from Diodes Incorporated is a 300mA, fixed 3.3V output low-dropout linear regulator with ±1% output voltage accuracy, 150mV dropout at full load, 35μA quiescent current, and 65dB PSRR at 1kHz-designed for battery-powered portable electronics requiring fast transient response and ultra-low standby power.
For engineers reviewing the AP7335A-33W5-7 datasheet, AP7335A-33W5-7 pinout, AP7335A-33W5-7 application, or AP7335A-33W5-7 equivalent, key selection criteria include dropout performance at 300mA, EN-controlled enable timing (220μs startup), thermal shutdown threshold (+145°C), stability with 1μF ceramic output capacitor, and SOT25 package compatibility in space-constrained designs.
Technical Context
The AP7335A integrates a PMOS pass transistor, precision band-gap reference, error amplifier, and protection circuitry-including current limit (~650mA), short-circuit clamp (~160mA), and thermal shutdown with +15°C hysteresis. Its architecture enables stable regulation without minimum load and supports fast line/load transients via optimized internal compensation.
It operates across 4.3V to 6V input range with fixed 3.3V output, requires no external components beyond 1μF input/output ceramic capacitors, and delivers regulated power under ambient temperatures from –40°C to +85°C. The EN pin provides active-high logic control with VIH ≥ 1.4V and VIL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over –40°C to +85°C - ensures consistent MCU/core voltage tolerance in portable systems. |
| Max Output Current | 300mA continuous - supports single-core microcontrollers, Bluetooth baseband ICs, and LCD bias rails. |
| Dropout Voltage | 150mV at 300mA - enables operation from single-cell Li-ion (≥3.45V) or 2xAA alkaline (≥4.3V) inputs. |
| Quiescent Current | 35μA typical - extends battery life in always-on sensor nodes and standby modes of mobile devices. |
| PSRR | 65dB at 1kHz - suppresses switching noise from DC/DC converters feeding the LDO input rail. |
| Startup Time | 220μs - allows rapid wake-up from deep sleep in GSM/TDMA burst-mode applications. |
| Thermal Shutdown | +145°C junction threshold - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
AP7335A-33W5-7 is packaged in SOT25 (3.0 × 2.8 × 1.1 mm), a surface-mount 5-pin package with exposed pad for thermal dissipation. Pin 1 is IN, Pin 2 is GND, Pin 3 is EN, Pin 4 is NC (no connection), and Pin 5 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 4.3–6V DC; requires ≥1μF MLCC bypass to GND near pin for noise rejection and stability. |
| GND (Pin 2) | Power ground reference | Common return path for input/output currents; must connect to low-impedance PCB ground plane. |
| EN (Pin 3) | Enable control input | Active-high logic input; drives regulator ON when ≥1.4V, OFF when ≤0.4V; ties to IN if always-on operation needed. |
| NC (Pin 4) | No connection | Internally unconnected; must remain floating or grounded per layout guidelines-no external routing. |
| OUT (Pin 5) | Regulated output | Delivers stable 3.3V; requires ≥1μF ceramic capacitor to GND with ESR >15mΩ for guaranteed stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 35μA quiescent current enables >1-year battery life in coin-cell–powered IoT sensors. |
| Fast transient response | Stable 3.3V output during 0→300mA load steps with <20mV undershoot/overshoot - critical for GSM baseband ICs. |
| Single-capacitor stability | Guaranteed stability with only 1μF ceramic output capacitor - reduces BOM count and board area vs. legacy LDOs. |
| Integrated protection | Current limit (~650mA), short-circuit clamp (~160mA), and thermal shutdown (+145°C) eliminate need for external fault management. |
| Green packaging | SOT25 package is halogen- and antimony-free, fully RoHS-compliant, and lead-free per EU Directive 2011/65/EU. |
Applications
| Smartphones | Bluetooth Headsets |
|---|---|
|
Use Scenario: Powering RF transceiver and audio codec during TDMA transmit bursts. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO supplying clean 3.3V to sensitive analog sections. Use Value: 220μs startup and 65dB PSRR prevent RF interference coupling into audio paths during rapid mode transitions. |
Use Scenario: Regulating power to Bluetooth SoC and MEMS microphone in compact ear-worn form factor. IC Role / Device Role / Timing Role: Primary 3.3V supply enabling ultra-low-power listening mode and instant wake-on-voice. Use Value: 35μA IQ minimizes idle drain; 150mV dropout extends usable battery voltage range down to 3.45V. |
| MP3/MP4 Players | Battery Chargers (USB-PD Input Stage) |
|
Use Scenario: Supplying NAND flash controller and DAC in portable media players with Li-ion battery input. IC Role / Device Role / Timing Role: Fixed-output LDO decoupling noisy DC/DC converter output to preserve audio signal integrity. Use Value: 1μF ceramic capacitor compatibility simplifies layout; ±1% accuracy ensures reliable memory interface timing margins. |
Use Scenario: Providing isolated 3.3V bias for USB-PD communication IC and status LEDs in multi-voltage charger designs. IC Role / Device Role / Timing Role: Secondary LDO powered from main buck converter output, enabled only during PD negotiation. Use Value: EN pin control enables precise sequencing; thermal shutdown prevents overheating during prolonged high-current charging. |
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 |
|---|---|---|---|
| MCP1700-3302E/TO | 250mA max output, 1.6μA IQ, 600mV dropout at 250mA - lower IQ but higher dropout and reduced current capability. | Limited to sub-250mA loads; unsuitable for 300mA GSM burst peaks. | Select only for ultra-long-life coin-cell applications where peak current never exceeds 250mA. |
| Torex XC6206P332MR-G | 300mA output, 1μA IQ, 300mV dropout at 300mA - ultra-low IQ but double the dropout voltage. | Requires ≥3.6V input minimum; incompatible with 3.45V Li-ion cutoff. | Prefer only when input voltage margin is ≥3.6V and standby time dominates over dynamic performance. |
Compared with MCP1700-3302E/TO and XC6206P332MR-G, the AP7335A-33W5-7 uniquely balances 300mA delivery, 150mV dropout, and 35μA IQ-making it optimal for Li-ion–powered portable devices needing both runtime and burst-mode responsiveness.
Availability
AP7335A-33W5-7 is available at Aetrix Electronics and suitable for smartphone power management, Bluetooth headset subsystems, portable media player voltage regulation, and USB-PD charger auxiliary biasing requiring stable component supply and SOT25 footprint compatibility.
Supply support for AP7335A-33W5-7 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 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-powered portable electronics demanding fast transient response, minimal board space, and robust thermal/overcurrent protection.
FAQ
What is the minimum input voltage required for AP7335A-33W5-7 to maintain regulation at 300mA?
The minimum input voltage is 4.3V, defined as VIN(MIN) = VOUT + VDROPOUT = 3.3V + 150mV at 300mA load. Below this, output voltage drops below specification due to insufficient headroom. This value is confirmed in the Recommended Operating Conditions table (Note 6) and validated across temperature range –40°C to +85°C.
Can AP7335A-33W5-7 operate without an output capacitor?
No. The device requires a minimum 1μF ceramic output capacitor with ESR >15mΩ for guaranteed stability, as specified in the Application Note and Electrical Characteristics section. Omitting it risks oscillation, excessive overshoot/undershoot during transients, and potential damage under load step conditions.
Is the NC pin (Pin 4) electrically isolated or internally tied to another node?
Pin 4 is a true no-connect terminal-internally unconnected and electrically isolated from all other pins and substrate. It must remain unconnected or grounded per Diodes' recommended pad layout; routing signals to it may cause parasitic coupling or violate thermal pad clearance rules.
Does AP7335A-33W5-7 support reverse polarity protection on the input?
No. The device lacks integrated reverse-voltage protection. Applying negative voltage to IN relative to GND exceeds Absolute Maximum Rating (VIN = –0.3V min) and may cause permanent damage. External protection diode or MOSFET-based reverse-polarity circuitry is required in systems with possible input reversal.
AP7335A-33W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 3.3V
- 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:
- SOT-25
AP7335A-33W5-7 FAQ
1.How can I place an order for AP7335A-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7335A-33W5-7 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-33W5-7 reliable?
The price and inventory of AP7335A-33W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7335A-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7335A-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7335A-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7335A-33W5-7?
AP7335A-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7335A-33W5-7 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-33W5-7?
For technical support, including AP7335A-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7335A-33W5-7 requirements.
6.How does Aetrix verify that AP7335A-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7335A-33W5-7 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-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7335A-33W5-7?
All AP7335A-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7335A-33W5-7, 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-33W5-7 part is unused and in its original packaging.
Return procedure for AP7335A-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7335A-33W5-7 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 practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
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…
