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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated PAM3101DUB330

Name: PAM3101DUB330
Brand: Diodes Incorporated
SKU: PAM3101DUB330
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM3101DUB330

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: PAM3101DUB330.pdf

Description:: IC REG LINEAR 3.3V 300MA SC70-5

Quantity:: RFQ Add To RFQ list

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Inventory:4,907

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Product details

Overview

PAM3101DUB330 from Diodes Incorporated is a 3.3V fixed-output, 300mA low-dropout CMOS linear regulator with 65µA quiescent current, 180mV dropout at full load, ±2% output accuracy, and 70dB PSRR at 1kHz-designed for noise-sensitive battery-powered systems such as Bluetooth earphones and portable WLAN modules.

For engineers reviewing the PAM3101DUB330 datasheet, PAM3101DUB330 pinout, PAM3101DUB330 application, or PAM3101DUB330 equivalent, key selection criteria include dropout voltage under 300mA load, EN pin logic behavior (active-high, default-pull-high), BYP capacitor requirement (10nF to GND), thermal shutdown threshold (150°C), and stability with ≥2.2µF ceramic output capacitance.

Technical Context

The PAM3101DUB330 integrates a P-channel MOSFET pass transistor (R_DS(on) ≈ 0.75Ω) enabling ultra-low ground current across load conditions. Its internal bandgap reference and error amplifier deliver ±2% output voltage accuracy over temperature and line/load variations.

It features active-high enable control, a dedicated 10nF bypass pin for noise filtering, thermal shutdown at 150°C with 30°C hysteresis, and current limiting set to ~400mA. The device operates from 2.5V to 5.5V input and remains stable with 2.2µF–10µF low-ESR ceramic output capacitors.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3V ±2% - ensures precise rail generation for 3.3V logic and RF subsystems without external feedback.
Max Output Current	300mA continuous - supports moderate-power peripherals like Bluetooth baseband ICs or WLAN transceivers.
Dropout Voltage	180mV @ 300mA - enables operation down to 3.48V input, extending usable battery life in single-cell Li-ion (3.0–4.2V) systems.
PSRR	70dB @ 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for analog/RF signal integrity.
Quiescent Current	65µA typical - minimizes standby power loss, enabling >1-year battery life in always-on wearable sensors.
Enable Threshold	V_TH = 1.5V min, V_TL = 0.3V max - compatible with 1.8V/3.3V GPIOs; EN default-pull-high eliminates need for external pull-up in most host designs.
Bypass Capacitor	10nF to GND on BYP pin - forms RC filter with internal 200kΩ resistor to reduce output noise to 50µV_RMS (10Hz–100kHz).

Pinout & Package

Package: DFN1.6x1.6-6L (1.6mm × 1.6mm, 0.5mm pitch, exposed thermal pad). Compact footprint ideal for space-constrained portable PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 - EN	Chip Enable input	Active-high logic control; internal pull-up ensures default ON state-no external resistor needed unless forced OFF during power-up.
2 - NC	No connection	Unbonded die pad; must be left floating or tied to GND per layout guidelines-no electrical function.
3 - VIN	Input supply	Accepts 2.5–5.5V; requires ≥1µF ceramic input capacitor within 12.7mm of pin to limit high-frequency impedance.
4 - VOUT	Regulated output	Delivers stable 3.3V; requires ≥2.2µF ceramic output capacitor (ESR ≤5mΩ) for loop stability and transient response.
5 - NC	No connection	Unbonded die pad; electrically isolated-must not be connected to any net.
6 - GND	Power and signal reference	Primary return path; connects to exposed thermal pad-requires solid copper pour for thermal dissipation (θ_JA = 175°C/W).

Key Features

Feature	Design Value
Low dropout voltage	180mV @ 300mA enables use with depleting Li-ion batteries (down to 3.48V input) while maintaining regulation.
High PSRR	70dB @ 1kHz reduces ripple from noisy switchers-critical for powering RF transceivers and ADC reference rails.
Fast discharge	Internal NMOS discharge path pulls VOUT to GND when EN = LOW, preventing back-powering of upstream circuitry.
Thermal shutdown	150°C trip with 30°C hysteresis prevents latch-up during sustained overload-resumes operation only after junction cools to 120°C.
Shutdown current	0.01–1µA in disable mode-enables µA-level system sleep states without compromising wake-up latency.

Applications

Bluetooth Earphones

Digital Cameras

Use Scenario: Powering Bluetooth audio codec and RF transceiver in compact wireless earbuds.

IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying clean bias to sensitive analog front-end and digital baseband.

Use Value: 70dB PSRR suppresses switching noise from buck converter powering MCU, preserving SNR in audio path.

Use Scenario: Supplying image sensor interface and SD card controller in pocket-sized digital cameras.

IC Role / Device Role / Timing Role: Low-noise 3.3V rail generator for high-speed parallel data buses and analog sensor biasing.

Use Value: 180mV dropout extends operational time during battery discharge curve-delays brown-out before flash charging cycle.

WLAN Modules

MP3 Players

Use Scenario: Regulating 3.3V for IEEE 802.11b/g/n RF transceivers and MAC controllers in embedded Wi-Fi modules.

IC Role / Device Role / Timing Role: Noise-isolated power source for RF PA bias and PLL VCO supply.

Use Value: BYP pin + 10nF capacitor reduces phase noise contribution to <1° RMS jitter-preserving OFDM symbol integrity.

Use Scenario: Providing stable 3.3V to audio DAC, flash memory controller, and OLED display driver in portable music players.

IC Role / Device Role / Timing Role: Main system LDO delivering regulated power to mixed-signal SoC peripherals.

Use Value: 65µA quiescent current enables >200h playback on 300mAh battery-meets consumer runtime expectations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP2125K-3.3TRG1	Same 3.3V/300mA spec, but SOT-23-5 package; EN active-high with internal pull-down (not pull-high); no BYP pin.	Lacks bypass filtering capability-unsuitable where sub-50µV_RMS noise is required for RF/analog circuits.	Select if board space allows SOT-23-5 and noise sensitivity is lower; verify EN logic compatibility with host GPIO.
MCP1700T-3302E/TT	3.3V/250mA, 1.6µA IQ, but 600mV dropout @ 250mA; no EN or BYP pins; SOT-23-3 package.	Higher dropout limits usable battery range; no enable control prevents dynamic power gating.	Choose only for ultra-low-IQ applications where load ≤250mA and dropout margin >600mV is acceptable.

Compared with AP2125K-3.3TRG1 and MCP1700T-3302E/TT, the PAM3101DUB330 uniquely combines low dropout (180mV), integrated BYP noise filtering, and EN default-pull-high-making it optimal for compact, noise-critical, battery-operated RF devices where layout area and EMI performance are constrained.

Availability

PAM3101DUB330 is available at Aetrix Electronics and suitable for Bluetooth earphones, WLAN modules, and portable digital cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant DFN packaging.

Supply support for PAM3101DUB330 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 consumer, industrial, and communications markets.

The PAM3101 belongs to Diodes' high-PSRR, low-I_Q LDO family-engineered specifically for portable electronics where battery life, noise immunity, and small-footprint integration are primary design constraints.

FAQ

What is the recommended output capacitor value and type for stable operation?

The PAM3101DUB330 requires a minimum 2.2µF ceramic output capacitor with ESR ≤5mΩ for guaranteed stability. X5R or X7R dielectrics are preferred. Larger values (up to 10µF) improve transient response but do not degrade stability. Tantalum or aluminum electrolytics are not recommended due to higher ESR and aging effects.

Does the BYP pin require an external capacitor, and what happens if it is omitted?

Yes-a 10nF ceramic capacitor must be placed between BYP and GND. Omitting it increases output noise by ~2× (to ~100µV_RMS) and degrades PSRR above 10kHz. The internal 200kΩ resistor and external capacitor form a low-pass filter; skipping the cap removes this noise-reduction path entirely.

How does the EN pin behave when left unconnected, and what is its logic polarity?

The EN pin has an internal pull-up resistor and is active-high. When left unconnected, it defaults to HIGH, enabling the regulator. Driving EN below 0.3V disables the output and reduces supply current to ≤1µA. No external pull-up is required-only a pull-down or GPIO drive is needed for controlled shutdown.

Can the PAM3101DUB330 be used with a 2.5V input to deliver 3.3V output?

No-the minimum input voltage is VO + V_DROP. With VO = 3.3V and V_DROP = 180mV, VIN must be ≥3.48V. A 2.5V input is below the dropout threshold and will cause regulation failure. This part is not suitable for step-up applications; use a boost converter followed by an LDO if input is <3.48V.

PAM3101DUB330 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Packaging:: Bulk

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):: 0.23V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 90 µA

Current - Supply (Max):: 90 µA

PSRR:: 70dB ~ 65dB (100Hz ~ 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:: SC-70-5

PAM3101DUB330 FAQ

1.How can I place an order for PAM3101DUB330 through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM3101DUB330 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 PAM3101DUB330 reliable?

The price and inventory of PAM3101DUB330 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3101DUB330 is usually 5 days.

3.What payment methods are accepted for PAM3101DUB330?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3101DUB330 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM3101DUB330?

PAM3101DUB330 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM3101DUB330 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 PAM3101DUB330?

For technical support, including PAM3101DUB330 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3101DUB330 requirements.

6.How does Aetrix verify that PAM3101DUB330 is sourced from the original manufacturer or authorized distributors?

All PAM3101DUB330 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 PAM3101DUB330 meets industry standards.

7.What is the process for return or replacement of PAM3101DUB330?

All PAM3101DUB330 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3101DUB330, 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 PAM3101DUB330 part is unused and in its original packaging.

Return procedure for PAM3101DUB330:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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