AP2210K-3.3TR - 300mA RF ULDO 3.3V Fixed | Diodes Incorporated
Teilenummer: AP2210K-3.3TR ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.18 | $0,18 |
| 10 | $0.16 | $1,60 |
| 100 | $0.13 | $13,00 |
| 500 | $0.11 | $55,00 |
| 1.000 | $0.09 | $90,00 |
| 3.000 | $0.07 | $210,00 |
AP2210K-3.3TR Übersicht
A Low-Dropout (LDO) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage, with the "dropout" specification being the minimum VIN-to-VOUT differential required to sustain regulation. LDOs belong to the broader hierarchy of linear regulators -> voltage regulators -> power management ICs -> semiconductors. Unlike switching converters, LDOs add no switching noise but dissipate the difference (VIN - VOUT) multiplied by load current as heat, making them preferred for noise-sensitive analog and RF rails.
Key features of the AP2210K-3.3TR include CMOS process technology, individual logic-compatible enable/shutdown control input, low-power shutdown mode for extended battery life, overcurrent protection, overtemperature protection, and reversed current protection. The 3.3V fixed output is factory-trimmed, eliminating external feedback resistors and reducing the external BOM to two ceramic capacitors plus the EN bypass.
The AP2210K-3.3TR uses a P-channel MOSFET pass element in a CMOS architecture, which is what enables the ultra-low quiescent current (typically 1 µA in shutdown) and the very-low reverse-leakage protection path. Its high PSRR at low audio frequencies (75 dB at 100 Hz) is particularly effective at suppressing rectified mains ripple that can otherwise couple into RF signal chains and baseband stages. The internal reference and error amplifier are trimmed at the wafer stage, so no post-package adjustment is needed for output accuracy.
Typical applications include battery-powered handsets and PDAs, RF electronics, cordless phones, handheld instrumentation, portable media players, and low-power MCU supply rails. The 3.3V fixed version is a natural match for 3.3V microcontrollers, Bluetooth/Wi-Fi modules, and sensor subsystems that demand clean supply rails.
When designing with this part, select ceramic input and output capacitors rated for the lowest expected operating temperature (X5R/X7R dielectric recommended), and keep the loop-trace area small to preserve phase margin. Note that this is the "TR" (tape-and-reel, non-green) packaging variant; the RoHS-compliant equivalent is AP2210K-3.3TRG1.
This page synthesizes distributor stock and pricing, drop-in alternatives (including same-brand output-voltage variants and cross-brand replacements), and practical design notes not consolidated on any single manufacturer page.
Drop-in-Alternativen für AP2210K-3.3TR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AP2210K-3.3TRG1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP2210K-2.5TRG1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP2210K-5.0TRG1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP2210K-3.0TRG1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP2210K-3.6TRG1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MIC5205-3.3YM5-TR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
BU33TD3WG-TR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP2210K-3.3TR Grenzwerte & elektrische Eigenschaften
| Ausgangstyp | Fixed |
| Ausgangsspannung | 3.3 V |
| Maximaler Ausgangsstrom | 300 mA |
| Dropout-Spannung | 250 mV typical at 300 mA |
| PSRR | 75 dB at 100 Hz |
| Standby/Shutdown Current | 1 µA maximum |
| Enable-Pin | Yes (logic-compatible) |
| Protection Features | Overcurrent, Overtemperature, Reverse Current |
| Gehäuse | SOT-23-5 (SC-74A, SOT-753) |
| Montageart | Surface Mount |
| RoHS-Status | Non-compliant (TR suffix); TRG1 suffix is RoHS compliant |
AP2210K-3.3TR Pin-Konfiguration
| Pin 1 | VIN — Input voltage supply |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable input (active-high, logic-compatible) |
| Pin 4 | NC — No connect (per datasheet, optionally used as bypass) |
| Pin 5 | VOUT — Regulated 3.3V output |
Typische Anwendungen
AP2210K-3.3TR ist geeignet für 7 Anwendungs: Battery-Powered Handsets and PDAs, RF Electronics Power Rails, Cordless Phones and Wireless Headsets, Handheld Test and Measurement Instrumentation, Portable Media Players and Wearables, Low-Power MCU and Sensor Supply Rails, Industrial Sensor Nodes and IoT Edge Devices.
Battery-Powered Handsets and PDAs
The AP2210K-3.3TR fits single-cell Li-ion and multi-cell alkaline/NiMH powered handsets because its ultra-low dropout of 250 mV at 300 mA lets the rail stay in regulation as the battery discharges toward its end-of-life cutoff. The 1 µA maximum standby current materially extends standby time when the handset is in sleep, while the 75 dB PSRR at 100 Hz cleans up rectified charger ripple that would otherwise leak into the audio CODEC and RF baseband. Compared with a switching regulator, the LDO does not require an inductor, saving roughly 25-50 mm² of PCB area, and adds no switching noise that could disturb the RF transceiver. Designers place a 1 µF X5R/X7R ceramic at VIN, a 1 µF X5R/X7R at VOUT, and route EN from the baseband GPIO for sequenced power-up. The SOT-23-5 footprint enables the part to fit directly under a BGA or beside a small RF shield.
Empfohlen
RF Electronics Power Rails
The AP2210K-3.3TR is marketed as a "300 mA RF ULDO regulator" because its 75 dB PSRR at 100 Hz and very-low output noise allow it to clean up switching-converter ripple before it reaches RF stages. In an RF transceiver reference design, the AP2210K-3.3TR typically follows a 5V or 3.6V buck converter and feeds VCO, PLL, LNA, and PA-driver supply pins with a quiet 3.3V. Compared with a discrete reference plus op-amp regulator, the integrated AP2210K-3.3TR saves PCB area, reduces BOM cost, and provides factory-trimmed accuracy without calibration. The trade-off is efficiency: at VIN=5V, VOUT=3.3V, and IOUT=300 mA, the regulator dissipates roughly 510 mW as heat, which the SOT-23-5 can handle in moderate ambient temperatures but may require thermal copper pour above 200 mA continuous.
Empfohlen
Cordless Phones and Wireless Headsets
The AP2210K-3.3TR is a strong fit for cordless phone base stations and wireless headsets where battery life, RF cleanliness, and small PCB footprint all matter simultaneously. Its 300 mA peak output can support the headset's RF transmit burst and DSP wake-up transient, while its 1 µA shutdown current preserves standby time between active calls. The active-high logic-compatible EN input allows the baseband MCU to power-cycle the radio during deep-sleep, eliminating any residual quiescent draw. Compared with a buck-boost converter at the same point of load, the LDO adds no radiated EMI that could desensitize the adjacent 2.4 GHz or DECT radio, and it costs less in external components.
Empfohlen
Handheld Test and Measurement Instrumentation
The AP2210K-3.3TR suits handheld digital multimeters, oscilloscope probes, and portable signal generators where 3.3V is the dominant rail for the ADC, MCU, and display subsystem. Its ultra-low dropout extends usable battery runtime by allowing the rail to stay in regulation even with a sagging 3.6V or 3.7V input near end-of-discharge, and its clean 75 dB PSRR prevents measurement noise from injecting into sensitive ADC reference paths. Compared with a discrete zener plus pass transistor, the AP2210K-3.3TR integrates reverse-current protection, overcurrent, and overtemperature protection. Designers typically pair it with a single 1 µF X7R input capacitor and a 1 µF X7R output capacitor and route EN high from the MCU at startup.
Empfohlen
Portable Media Players and Wearables
The AP2210K-3.3TR is well-matched to portable media players and wearable devices that draw average loads of 30-80 mA but peak spikes up to 200-300 mA during Wi-Fi or Bluetooth transmit bursts. Its 300 mA current rating covers the peak without saturating, while its 1 µA standby current is negligible compared to the rest of the system's sleep power. In a wearable audio design, the AP2210K-3.3TR can feed the audio CODEC, the BT radio, and the haptic driver; the very-low noise floor prevents audible supply whine in the headphones. Compared with a high-efficiency buck at this load, the LDO trades some battery life for a quieter, smaller, lower-cost solution.
Empfohlen
Low-Power MCU and Sensor Supply Rails
The AP2210K-3.3TR is a natural companion for 3.3V microcontrollers, Bluetooth Low Energy modules, and MEMS sensor subsystems that need a clean, low-ripple supply. At idle, the MCU draws microamps, and the LDO's quiescent current is similarly small (typically tens of microamps) so efficiency is high. During active bursts, the regulator can deliver up to 300 mA to support RF transmit and sensor sampling without sag. Its active-high enable pin lets the MCU turn the rail off entirely when in deep sleep, dropping standby current to 1 µA. The SOT-23-5 footprint keeps the regulator footprint compact, leaving more board space for antennas or larger batteries.
Empfohlen
Industrial Sensor Nodes and IoT Edge Devices
The AP2210K-3.3TR fits industrial 4-20 mA loop-powered or battery-powered sensor nodes and IoT edge devices that must operate for years on a single battery. Its low quiescent current, 1 µA shutdown, and ultra-low dropout at 300 mA maximize energy harvested or stored; its 75 dB PSRR rejects the switching noise from adjacent DC-DC converters in dense IoT gateway PCAs. The fixed 3.3V output eliminates the need for resistor-divider accuracy tuning in volume production. Compared with a buck regulator at similar loads, the LDO trades efficiency for lower BOM cost, smaller footprint, and zero switching EMI which is critical when the IoT radio is co-located.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AP2210K-3.3TR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AP2210K-3.3TRG1 | AP2210K-2.5TRG1 | AP2210K-3.0TRG1 | MIC5205-3.3YM5-TR | BU33TD3WG-TR |
|---|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Microchip Technology | ROHM Semiconductor |
| Package | SOT-23-5 | SOT-23-5 (same) | SOT-23-5 (same) | SOT-23-5 (same) | SOT-23-5 (same) | SOT-23-5 (same) |
| Output Voltage | 3.3 V | 3.3 V | 2.5 V | 3.0 V | 3.3 V | 3.3 V |
| Maximum Output Current | 300 mA | 300 mA | 300 mA | 300 mA | 150 mA | 200 mA |
| RoHS Compliance | Non-compliant (TR suffix only) | Compliant | Compliant | Compliant | Compliant | Compliant |
Wichtigste Unterscheidungsmerkmale
- 75 dB PSRR at 100 Hz, marketed as 'RF ULDO' (vs. MIC5205-3.3YM5-TR (Microchip))
- 1 µA maximum standby current with logic EN (vs. BU33TD3WG-TR (ROHM))
- Same-die drop-in voltage variants across the AP2210K family (vs. Discretes or competing families)
Designhinweise
Estimated: At VIN=5V, VOUT=3.3V, and IOUT=300 mA, the LDO dissipates (5V - 3.3V) * 0.3A = 510 mW. The SOT-23-5 has a typical theta_JA of approximately 250 C/W on a 1 square inch 2-layer FR-4 board, producing a junction temperature rise of roughly 127 C above ambient. Designers should either lower VIN or limit continuous load to stay below the 125 C junction limit. For applications that pull 300 mA continuously, switching to a higher-VIN buck then feeding the LDO is more thermally efficient than direct 5V-to-3.3V LDO regulation.
Per the Diodes AP2210 datasheet, place the input and output ceramic capacitors as close to the IC pins as possible, ideally within 2-3 mm. Use a 1 µF X5R/X7R ceramic at VIN (to ground) and a 1 µF X5R/X7R ceramic at VOUT (to ground). Keep the loop area of the GND return path small to minimize high-frequency impedance. The exposed pad (if present on the layout) should be soldered to a copper pour tied to GND to improve thermal performance.
Do not confuse the TR suffix with TRG1: AP2210K-3.3TR is the legacy non-RoHS tape-and-reel variant, while AP2210K-3.3TRG1 is the RoHS/green-compliant version with the same die. For new product designs sold in jurisdictions requiring RoHS or Prop 65 compliance, always specify the TRG1 suffix. Also, do not exceed the absolute maximum input voltage (consult the datasheet Electrical Characteristics table); input voltages above this rating will damage the pass element.
Route the EN trace away from noisy switching nodes and the RF antenna region. If the LDO is downstream of a switching regulator, place it on the opposite side of a ground plane partition to maximize high-frequency isolation. A small ferrite bead in series with VIN plus a 10 nF decoupling cap directly at the load (after the bead) further improves high-frequency PSRR, which is critical for RF and audio applications.
Compliance-Informationen
AP2210K-3.3TR (TR suffix only) is the legacy non-RoHS variant. The RoHS-compliant equivalent is AP2210K-3.3TRG1 (same die, green suffix), which is the recommended part for new designs. AEC-Q100 not applicable - this part is industrial/commercial grade, not automotive qualified per the AP2210 datasheet.
