My Inquiry
My Account
Diodes Incorporated AP7361EA-33FGE-7
- Part No.:
- AP7361EA-33FGE-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AP7361EA-33FGE-7.pdf
- Description:
- LDO CMOS HICURR U-DFN3030-8 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:870
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7361EA-33FGE-7 from Diodes Incorporated is a 1A, fixed-output (3.3V), ultra-low dropout linear regulator in U-DFN3030-8 (Type E) package with enable control, ±1% output accuracy, 360mV dropout at 1A, and 68µA quiescent current-designed for stable power delivery in space-constrained battery-powered devices such as portable audio equipment and LCD monitor logic supplies.
For engineers reviewing the AP7361EA-33FGE-7 datasheet, AP7361EA-33FGE-7 pinout, AP7361EA-33FGE-7 application, or AP7361EA-33FGE-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world application constraints, and validated alternative options for low-noise, low-quiescent-current LDO selection.
Technical Context
The AP7361EA-33FGE-7 integrates a PMOS pass element with internal 0.8V bandgap reference and error amplifier to regulate fixed 3.3V output across 2.2V–6.0V input range. Its foldback short-circuit protection limits output current to 400mA during fault, while thermal shutdown activates at +150°C with 20°C hysteresis.
It supports fast start-up (≤200µs), achieves 75dB PSRR at 1kHz, and remains stable with ≥2.2µF MLCC output capacitance. The EN pin requires VIH ≥1.0V and VIL ≤0.3V for reliable logic-level control-no external pull-up needed due to integrated 3.0MΩ EN pull-down resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - ensures precise rail generation for 3.3V microcontrollers and interface ICs without external feedback. |
| Max Output Current | 1.0A continuous - sufficient to power SoC cores, DDR I/O, or multi-rail PMIC subsystems in compact designs. |
| Dropout Voltage | 360mV typical at 1A - enables operation from 3.66V input (e.g., single-cell Li-ion at end-of-discharge) while maintaining regulation. |
| Quiescent Current | 68µA typical - minimizes standby power loss in always-on circuits like RTC or sensor wake-up paths. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | Triggers at +150°C junction temperature - protects against sustained overload or poor PCB thermal layout. |
| Enable Threshold | VIH = 1.0V min, VIL = 0.3V max - compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
AP7361EA-33FGE-7 uses the U-DFN3030-8 (Type E) thermally enhanced 3mm × 3mm, 0.5mm pitch package with exposed thermal pad (EP). Recommended PCB layout includes ≥4 thermal vias under EP connected to internal GND plane for θJA = 70°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Main input supply pin; requires ≥1µF ceramic bypass capacitor placed adjacent to pin to suppress high-frequency noise. |
| 2 | GND | Power ground reference; must be low-impedance connection to system GND plane to maintain stability and PSRR. |
| 3 | ADJ/NC | No-connect on fixed-output variant; left floating or tied to GND per design-no external resistor divider required. |
| 4 | EN | Active-high enable; internal 3.0MΩ pull-down ensures default OFF state; driven by 1.8V/3.3V logic without external components. |
| 5 | GND | Second ground terminal; electrically identical to Pin 2-used for improved current return path and thermal conduction. |
| 6 | NC | No internal connection; must remain unconnected per datasheet-no routing or soldering allowed. |
| 7 | NC | No internal connection; must remain unconnected per datasheet-no routing or soldering allowed. |
| 8 | OUT | Regulated 3.3V output; requires ≥2.2µF ceramic capacitor with low ESR; larger values improve load transient response. |
| EP | Exposed Pad | Thermal interface only-not functional electrical node; must connect to GND plane via ≥4 thermal vias for safe 1A operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 360mV at 1A enables use with <3.7V inputs-critical for single-cell Li-ion or USB-powered systems. |
| Low quiescent current | 68µA enables >1-year battery life in always-on IoT sensors using CR2032 or coin cells. |
| Foldback short-circuit protection | Clamps output to 400mA during hard shorts-prevents thermal runaway while allowing safe recovery when fault clears. |
| Stable with small MLCCs | Works with ≥2.2µF X5R/X7R ceramics-eliminates need for bulky electrolytics in thin-profile consumer devices. |
| Integrated EN pull-down | 3.0MΩ internal resistor ensures defined OFF state at power-up-removes need for external pull-down resistor. |
Applications
| Portable Audio Devices | LCD Monitor Logic Supply |
|---|---|
Use Scenario: Powering DAC, headphone amp, and Bluetooth baseband ICs in wireless earbuds with tight thermal and board space constraints. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering clean, low-noise bias to analog and digital signal chains. Use Value: 75dB PSRR at 1kHz rejects noise from shared DC/DC converter, preserving audio SNR >100dB. | Use Scenario: Supplying timing controller (TCON), LVDS transmitter, and MCU in 24-inch LCD monitors with 12V input rails. IC Role / Device Role / Timing Role: Fixed 3.3V post-regulator ensuring stable voltage for display interface logic under dynamic backlight load changes. Use Value: 200µs start-up time allows rapid panel wake-from-standby without visible flicker or initialization delay. |
| Smart Home Sensors | Industrial HMI Panels |
Use Scenario: Providing regulated 3.3V to Zigbee/Thread SoCs and environmental sensors in battery-operated smart thermostats. IC Role / Device Role / Timing Role: Always-on LDO supporting ultra-low-power sleep modes and fast wake-up response. Use Value: 68µA IQ extends CR123A battery life beyond 3 years in periodic transmission mode (10s wake, 60s sleep). | Use Scenario: Powering ARM Cortex-M7 MCU, touchscreen controller, and CAN transceiver in DIN-rail mounted HMI panels operating at -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade LDO with thermal shutdown and wide ambient rating for unattended operation. Use Value: Thermal hysteresis (20°C) prevents oscillation during sustained 1A loads in enclosed enclosures without forced airflow. |
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, 170mV dropout at 250mA, no enable pin, SOT-23-3 package | Limited to low-current peripherals; lacks EN control for power sequencing | Select only for sub-250mA loads where board space is critical and enable functionality is unnecessary. |
| TLS850B2TE/V1 | 500mA max output, automotive AEC-Q100 qualified, integrated watchdog and reset, PG pin, TO-263-5 | Designed for automotive body electronics; higher cost and larger footprint | Choose only for automotive programs requiring PPAP, ASIL-B compliance, and system monitoring features. |
Compared with MCP1700-3302E/TO and TLS850B2TE/V1, AP7361EA-33FGE-7 uniquely balances 1A capability, 360mV dropout, enable control, and 3mm×3mm footprint-making it optimal for industrial and consumer applications needing robust, space-efficient 3.3V regulation without automotive overhead.
Availability
AP7361EA-33FGE-7 is available at Aetrix Electronics and suitable for portable audio devices, LCD monitor logic supplies, smart home sensors, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7361EA-33FGE-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AP7361EA belongs to Diodes' high-performance LDO family targeting space-constrained, low-power systems requiring precision voltage regulation, fast transient response, and robust fault protection-especially in battery-powered and industrial edge devices.
FAQ
What is the minimum input voltage required for AP7361EA-33FGE-7 to maintain 3.3V output at 1A?
The minimum input voltage is 3.66V, calculated as VOUT + VDROPOUT = 3.3V + 0.36V. Below this, regulation fails and output drops. At lighter loads (e.g., 100mA), dropout falls to ~90mV, allowing operation down to ~3.39V input.
Can AP7361EA-33FGE-7 be used without connecting the EN pin?
Yes-the EN pin has an internal 3.0MΩ pull-down resistor, so leaving it unconnected defaults the device to OFF. To ensure always-ON operation, tie EN directly to IN. Do not leave EN floating in noisy environments due to potential false triggering.
Is the exposed pad (EP) on U-DFN3030-8 required to be connected to GND?
The exposed pad is a thermal interface, not an electrical node. It must be connected to the PCB's GND plane via ≥4 thermal vias for thermal performance (θJA = 70°C/W), but it serves no electrical function-do not route signals or power through it.
Does AP7361EA-33FGE-7 require a minimum load current to maintain regulation stability?
No minimum load is required. The device remains stable and fully regulated from 0A to 1A output current, including no-load conditions-verified across -40°C to +85°C ambient per datasheet Section 7.1.
AP7361EA-33FGE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- 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):
- 0.5V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 91 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN3030-8 (Type E)
AP7361EA-33FGE-7 FAQ
1.How can I place an order for AP7361EA-33FGE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361EA-33FGE-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 AP7361EA-33FGE-7 reliable?
The price and inventory of AP7361EA-33FGE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361EA-33FGE-7 is usually 5 days.
3.What payment methods are accepted for AP7361EA-33FGE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361EA-33FGE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361EA-33FGE-7?
AP7361EA-33FGE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361EA-33FGE-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 AP7361EA-33FGE-7?
For technical support, including AP7361EA-33FGE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361EA-33FGE-7 requirements.
6.How does Aetrix verify that AP7361EA-33FGE-7 is sourced from the original manufacturer or authorized distributors?
All AP7361EA-33FGE-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 AP7361EA-33FGE-7 meets industry standards.
7.What is the process for return or replacement of AP7361EA-33FGE-7?
All AP7361EA-33FGE-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361EA-33FGE-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 AP7361EA-33FGE-7 part is unused and in its original packaging.
Return procedure for AP7361EA-33FGE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7361EA-33FGE-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
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…
