My Inquiry
My Account
Diodes Incorporated AP131-33YL-13
- Part No.:
- AP131-33YL-13
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-89-5/6
- Datasheet:
-
AP131-33YL-13.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,174
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP131-33YL-13 from Diodes Incorporated is a 300mA fixed-output low-dropout linear regulator with 3.3V output, 400mV dropout at full load, ±2% output accuracy, and 50µA quiescent current. It features active-low enable (EN), bandgap bypass (BP), thermal shutdown, and current limiting - optimized for battery-powered wireless modules and PC peripherals.
For engineers reviewing the AP131-33YL-13 datasheet, AP131-33YL-13 pinout, AP131-33YL-13 application, or AP131-33YL-13 equivalent, key selection criteria include dropout voltage under 300mA load, EN logic polarity, SOT89-5L thermal performance, BP capacitor noise suppression capability, and RoHS-compliant lead-free packaging.
Technical Context
The AP131-33YL-13 integrates a PMOS pass element with no base current draw, an error amplifier referenced to a 1.08V bandgap, and internal current-limit/thermal-shutdown protection circuitry. Its EN pin controls operation via active-low logic, and the BP pin allows external capacitor connection to reduce output noise.
Designed for stable regulation across input voltages from 2.7V to 5.5V, it maintains ≤35mV load regulation (1–300mA) and achieves 60dB PSRR at 100Hz. Dropout is specified at 400mV (typ) with 300mA output current and constant junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures stable supply for 3.3V logic interfaces and microcontrollers |
| Max Output Current | 300mA - supports moderate-power RF transceivers and peripheral ICs |
| Dropout Voltage | 400mV @ 300mA - enables operation down to 3.7V input for single-cell Li-ion systems |
| Quiescent Current | 50µA (typ) - minimizes standby power loss in always-on battery applications |
| Enable Logic | Active-low EN - compatible with standard GPIO outputs driving high to activate |
| Thermal Protection | Integrated thermal shutdown - prevents damage during sustained overload or poor PCB heatsinking |
| PSRR @ 100Hz | 60dB - suppresses ripple from switching DC-DC stages upstream of LDO |
Pinout & Package
SOT89-5L package: thermally enhanced 5-pin surface-mount outline with exposed pad for improved heat dissipation; footprint per Diodes Inc. AP02001 layout guide.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.7–5.5V; requires ≥1µF ceramic input capacitor for stability |
| 2 (GND) | Power ground reference | Common return path for IN, OUT, EN, and BP; must be low-impedance |
| 3 (EN) | Enable control input | Active-low logic: <0.8V disables regulator; >1.5V enables output |
| 4 (BP) | Bandgap bypass node | Connects 0.1µF capacitor to reduce output noise and improve PSRR |
| 5 (OUT) | Regulated output | Delivers 3.3V ±2% at up to 300mA; requires ≥10µF ceramic output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| PMOS pass transistor | Zero gate drive current required - eliminates base-current losses seen in PNP-based LDOs |
| Fast transient response | Stabilizes within microseconds after load step - critical for burst-mode wireless transmission |
| Short-circuit foldback | Limits output current to 150–300mA during fault - reduces thermal stress vs. constant-current limit |
| Lead-free only | SOT89-5L variant complies fully with RoHS Directive Annex 5/7 exemptions - no lead, no green marking needed |
| Low-noise BP pin | 0.1µF capacitor on BP reduces output voltage noise by >20dB - improves ADC reference stability |
Applications
| Wireless Communication Module | USB Peripheral Controller |
|---|---|
Use Scenario: Powering Bluetooth LE or Zigbee SoCs in compact IoT sensors with intermittent transmit bursts. IC Role / Device Role / Timing Role: Primary 3.3V supply regulator with fast load transient recovery and ultra-low IQ during sleep. Use Value: Enables >1-year battery life in coin-cell-powered devices due to 50µA quiescent current and 400mV dropout at 300mA peak load. | Use Scenario: Regulating 3.3V rail for USB 2.0 hub controllers and flash memory interfaces in docking stations. IC Role / Device Role / Timing Role: Clean, low-noise post-regulator downstream of buck converter; BP capacitor suppresses switching noise. Use Value: Maintains <35mV load regulation across 1–300mA, preventing USB enumeration failures during hot-plug events. |
| CD/DVD Drive Logic Supply | Industrial Sensor Node MCU |
Use Scenario: Providing stable 3.3V to servo motor drivers and optical pickup ICs in optical storage devices. IC Role / Device Role / Timing Role: Fixed-output LDO with thermal shutdown protecting against mechanical stall-induced overcurrent. Use Value: Withstands 125°C junction temperature and delivers guaranteed 300mA even at elevated ambient - avoids brownouts during seek operations. | Use Scenario: Powering ARM Cortex-M0+ MCUs and analog front-ends in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Always-on system regulator with active-low EN synchronized to sensor sampling intervals. Use Value: EN pin enables precise power gating; combined with 50µA IQ, extends 2xAA alkaline battery life to >3 years in 1-minute wake/sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2202K-3.3TRG1 | 250mA rated, SOT-23-5, 600mV dropout @ 250mA, no BP pin | Limited to lower-current digital loads; lacks noise-reduction capability | Choose when board space is constrained and noise sensitivity is low |
| MCP1700T-3302E/TT | 250mA, SOT-23-3, 178mV dropout @ 250mA, no EN or BP pins | Pin-count minimal but non-adjustable enable and no noise filtering option | Prefer for cost-sensitive, low-complexity designs without dynamic control needs |
Compared with AP2202K-3.3TRG1 and MCP1700T-3302E/TT, the AP131-33YL-13 uniquely combines 300mA drive, BP-enabled noise reduction, and active-low EN in SOT89-5L - making it optimal for thermally demanding, noise-sensitive, and dynamically controlled 3.3V systems.
Availability
AP131-33YL-13 is available at Aetrix Electronics and suitable for wireless communication modules, USB peripheral controllers, and industrial sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP131-33YL-13 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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP131 series belongs to Diodes' precision LDO portfolio, engineered specifically for battery-powered and noise-sensitive applications where low IQ, tight output tolerance, and robust fault protection are mandatory.
FAQ
What is the minimum input voltage required for stable 3.3V output at 300mA?
The AP131-33YL-13 requires at least 3.7V input (3.3V + 0.4V dropout) to maintain regulation at full 300mA load. Below 3.7V, output voltage drops linearly with input; operation below 2.7V is outside absolute maximum ratings and not functional.
Can the BP pin be left unconnected?
Yes, the BP pin may be left floating or tied directly to OUT without damage, but doing so forfeits the noise-reduction benefit. For best PSRR and output voltage stability - especially with noisy upstream supplies - a 0.1µF ceramic capacitor must be placed between BP and GND.
Is the SOT89-5L package thermally compatible with 300mA continuous operation?
Yes, the SOT89-5L package has θJA = 100°C/W. At 300mA and 5.5V input, worst-case power dissipation is ~660mW, resulting in ~66°C rise above ambient - well within the –40°C to +125°C junction range when mounted per AP02001 layout guidelines.
Does the EN pin have an internal pull-up or pull-down resistor?
No, the EN pin has no internal biasing resistor. It must be driven actively high (>1.5V) to enable or low (<0.8V) to disable. Leaving EN floating risks undefined output state and potential shoot-through current; external pull-down is recommended for default-off behavior.
AP131-33YL-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-89-5/6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-5
AP131-33YL-13 FAQ
1.How can I place an order for AP131-33YL-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP131-33YL-13 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 AP131-33YL-13 reliable?
The price and inventory of AP131-33YL-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP131-33YL-13 is usually 5 days.
3.What payment methods are accepted for AP131-33YL-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP131-33YL-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP131-33YL-13?
AP131-33YL-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP131-33YL-13 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 AP131-33YL-13?
For technical support, including AP131-33YL-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP131-33YL-13 requirements.
6.How does Aetrix verify that AP131-33YL-13 is sourced from the original manufacturer or authorized distributors?
All AP131-33YL-13 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 AP131-33YL-13 meets industry standards.
7.What is the process for return or replacement of AP131-33YL-13?
All AP131-33YL-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP131-33YL-13, 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 AP131-33YL-13 part is unused and in its original packaging.
Return procedure for AP131-33YL-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP131-33YL-13 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
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
