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Diodes Incorporated PAM3112DAB120
- Part No.:
- PAM3112DAB120
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
PAM3112DAB120.pdf
- Description:
- IC REG LINEAR 1.2V 300MA TSOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,456
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Product details
Overview
PAM3112DAB120 from Diodes Incorporated is a 300mA, 1.2V fixed-output CMOS low-dropout linear regulator in TSOT25 package, featuring 65µA typical quiescent current, ±2% output voltage accuracy, and integrated enable (EN), bypass (BYP), thermal shutdown, and current limiting. It delivers stable regulation for battery-powered portable electronics requiring compact footprint and low power consumption.
For engineers reviewing the PAM3112DAB120 datasheet, PAM3112DAB120 pinout, PAM3112DAB120 application, or PAM3112DAB120 equivalent, key selection criteria include dropout voltage (300mV typ), output stability with ≥2.2µF ceramic capacitor, EN logic compatibility (1.5V high threshold), BYP noise filtering capability, and thermal performance in TSOT25 (θJA = 250°C/W).
Technical Context
The PAM3112DAB120 integrates a 0.75Ω P-channel MOSFET pass transistor enabling low ground current across load conditions and a 200kΩ internal resistor paired with the BYP pin to form a low-pass filter for output noise suppression. Its control architecture uses internal voltage reference and error amplifier to maintain regulation under line/load transients.
It operates over 2.5V–5.5V input range with guaranteed 300mA output at 1.2V, supports fast transient response (20mV spike for 1mA→300mA step), and implements over-temperature shutdown at +150°C with +30°C hysteresis. The EN pin enables active-high digital control with 0.01µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±2% - ensures precise core/bias rail for low-voltage ICs without external feedback network. |
| Max Output Current | 300mA - sufficient for powering baseband processors, RF front-ends, or sensor subsystems in portable devices. |
| Quiescent Current | 65µA typ - extends battery life in always-on or standby modes of Bluetooth earphones and cordless handsets. |
| Dropout Voltage | 300mV typ at 300mA - allows operation down to 1.5V input, maximizing usable capacity of single-cell Li-ion or alkaline batteries. |
| PSRR | 70dB at 100Hz - suppresses ripple from noisy switching supplies or shared battery rails in multi-rail systems. |
| Thermal Shutdown | Activates at +150°C with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heat sinking. |
| BYP Capacitor | 10nF to GND - forms RC filter with internal 200kΩ resistor to reduce output noise to 50µVRMS (10Hz–100kHz). |
Pinout & Package
TSOT25 (5-pin, 1.6mm × 2.9mm, 0.95mm height) provides enhanced thermal performance over SOT23 while maintaining ultra-small footprint for space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.5V–5.5V; requires ≥1µF ceramic input capacitor placed within 0.5 inch for stability. |
| GND | Power ground reference | Common return path for input, output, and internal circuitry; must be low-impedance PCB plane. |
| EN | Enable control input | Active-high logic: >1.5V enables regulator; <0.3V disables with 0.01µA shutdown current. |
| BYP | Bypass filter node | Connects 10nF capacitor to GND to reduce output noise; internal 200kΩ resistor sets RC corner frequency. |
| VOUT | Regulated output | Delivers stable 1.2V ±2%; requires ≥2.2µF ceramic capacitor with ESR >5mΩ for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low quiescent current | 65µA typ maintains efficiency in battery-critical applications like MP3 players and WLAN modules. |
| Integrated enable function | EN pin enables system-level power sequencing and deep-sleep mode control without external logic. |
| BYP noise filtering | On-chip 200kΩ resistor + external 10nF capacitor reduces broadband output noise to 50µVRMS. |
| Thermal and current protection | Auto-recovering shutdown at +150°C and current limit prevent failure during short-circuit or overload events. |
| Small-footprint packaging | TSOT25 offers 30% smaller area than SOT23 with comparable θJA (250°C/W), easing layout in handheld PCBs. |
Applications
| Bluetooth Earphone Power Rail | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Powers Bluetooth audio codec and RF transceiver in compact wireless earbuds with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.2V LDO delivering clean, low-noise bias to analog and mixed-signal blocks. Use Value: 65µA quiescent current extends standby time; 300mV dropout enables use until battery reaches 1.5V; BYP filtering ensures low THD in audio path. |
Use Scenario: Supplies regulated 1.2V to CMOS image sensor's analog front-end and PLL in portable digital cameras. IC Role / Device Role / Timing Role: Low-noise voltage source for precision analog circuits requiring stable reference and minimal ripple. Use Value: 70dB PSRR at 100Hz rejects switching noise from adjacent DC/DC converters; ±2% accuracy ensures consistent sensor gain calibration. |
| MP3 Player Core Logic | WLAN Module Baseband |
|
Use Scenario: Provides 1.2V core supply to ARM-based audio processor in flash-based MP3 players. IC Role / Device Role / Timing Role: Load-regulated power source supporting dynamic CPU frequency scaling and burst playback. Use Value: 30mV load-transient spike (1mA→300mA) prevents brownout during decode bursts; EN pin enables firmware-controlled power gating. |
Use Scenario: Powers baseband processor and RF synthesizer in IEEE 802.11b/g/n WLAN modules embedded in laptops and IoT gateways. IC Role / Device Role / Timing Role: Stable, low-ESR-compatible LDO for noise-sensitive RF and timing circuits. Use Value: 2.2µF minimum output capacitance ensures stability with small ceramic caps; thermal shutdown protects against enclosure overheating during sustained transmit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2127K-1.2TRG1 | Same manufacturer, 300mA, 1.2V, SOT23-3; no EN/BYP pins; higher IQ (100µA typ) | Lacks enable and bypass functionality; simpler integration where sequencing/noise filtering not required | Select when board space permits larger SOT23 and system does not require active power control or ultra-low noise. |
| MCP1700T-1202E/TT | Microchip, 250mA, 1.2V, SOT23-3; 1.6µA IQ; no EN/BYP; 600mV dropout at 250mA | Ultra-low IQ ideal for multi-year battery life, but insufficient current and higher dropout for 1.2V Li-ion systems | Prefer only for ultra-low-power sensor nodes with light loads (<150mA) and input >2.0V. |
Compared with AP2127K-1.2TRG1, PAM3112DAB120 adds EN/BYP for system control and noise reduction; compared with MCP1700T-1202E/TT, it trades ultra-low IQ for higher output current and lower dropout-critical for 1.2V rail generation from depleting batteries.
Availability
PAM3112DAB120 is available at Aetrix Electronics and suitable for Bluetooth earphones, digital cameras, MP3 players, and WLAN modules requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.
Supply support for PAM3112DAB120 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 solutions for consumer, computing, communications, and industrial markets.
The PAM3112 belongs to Diodes' high-efficiency linear regulator product line, designed specifically for portable battery-powered devices demanding ultra-low quiescent current, small footprint, and robust protection features.
FAQ
What is the minimum output capacitance required for stability with PAM3112DAB120?
The PAM3112DAB120 requires a minimum 2.2µF ceramic output capacitor with ESR greater than 5mΩ for guaranteed stability across temperature and load conditions. Larger capacitance improves transient response and PSRR, but values below 2.2µF risk oscillation or regulation loss. X5R/X7R dielectrics are recommended for stable performance.
Can the BYP pin be left unconnected?
No. The BYP pin must be connected to a 10nF capacitor tied to GND to ensure proper noise filtering and internal reference stability. Leaving BYP floating disables the internal RC filter, increasing output noise to ~100µVRMS and potentially degrading regulation accuracy under high-frequency interference.
What happens when EN is left floating?
When EN is left floating, the internal pull-up activates and the device remains enabled. However, this configuration risks unintended shutdown due to noise coupling; Diodes recommends tying EN directly to VIN for default-on operation or using a controlled logic signal for reliable sequencing in production designs.
Is PAM3112DAB120 suitable for automotive applications?
No. PAM3112DAB120 is specified for −40°C to +85°C ambient operation and lacks AEC-Q100 qualification, automotive-grade screening, or extended temperature support. It is intended for commercial portable electronics-not automotive infotainment, ADAS, or body control modules requiring automotive reliability standards.
PAM3112DAB120 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 300mA (Typ)
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- 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:
- TSOT-25
PAM3112DAB120 FAQ
1.How can I place an order for PAM3112DAB120 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3112DAB120 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 PAM3112DAB120 reliable?
The price and inventory of PAM3112DAB120 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3112DAB120 is usually 5 days.
3.What payment methods are accepted for PAM3112DAB120?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3112DAB120 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3112DAB120?
PAM3112DAB120 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3112DAB120 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 PAM3112DAB120?
For technical support, including PAM3112DAB120 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3112DAB120 requirements.
6.How does Aetrix verify that PAM3112DAB120 is sourced from the original manufacturer or authorized distributors?
All PAM3112DAB120 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 PAM3112DAB120 meets industry standards.
7.What is the process for return or replacement of PAM3112DAB120?
All PAM3112DAB120 units undergo pre-shipment inspection (PSI). If there is an issue with PAM3112DAB120, 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 PAM3112DAB120 part is unused and in its original packaging.
Return procedure for PAM3112DAB120:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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