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Diodes Incorporated PAM2304AABADJ
- Part No.:
- PAM2304AABADJ
- Manufacturer:
- Diodes Incorporated
- Package:
- -
- Datasheet:
-
PAM2304AABADJ.pdf
- Description:
- IC REG BUCK ADJ 1A SYNC TSOT25
- Quantity:
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Inventory:4,391
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Product details
Overview
PAM2304AABADJ from Diodes Incorporated is a 3MHz, 1A synchronous step-down DC-DC converter with adjustable output (0.6V–VIN), 40µA quiescent current, and integrated high-side/low-side MOSFETs. It operates from 2.5V–5.5V input-compatible with single Li+/Li-polymer cells-and delivers stable regulation in portable electronics requiring high efficiency and light-load PSM mode.
For engineers reviewing the PAM2304AABADJ datasheet, PAM2304AABADJ pinout, PAM2304AABADJ application, or PAM2304AABADJ equivalent, key selection criteria include its 3MHz switching frequency for compact filter design, 0.6V feedback reference for precise output setting, thermal shutdown at +150°C, and TSOT25 package compatibility with space-constrained PCB layouts.
Technical Context
The PAM2304AABADJ uses current-mode PWM control for fast transient response under heavy load and automatically transitions to pulse-skipping modulation (PSM) at light loads to maintain high efficiency while minimizing quiescent current to 40µA typical. Its internal synchronous rectifier eliminates external Schottky diode requirements.
It features a fixed 0.6V feedback reference voltage, enabling output adjustment via external resistor divider, and integrates soft-start, UVLO (2.5V threshold), short-circuit protection (1.5A peak current limit), and thermal shutdown with 30°C hysteresis. The EN pin provides precise enable/disable control with 1.5V high-threshold and 0.3V low-threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3MHz - enables use of small 1µH inductors and 10µF ceramic capacitors for minimal footprint. |
| Output Current | 1A continuous - supports core logic rails in smartphones and portable peripherals without external current boosting. |
| Feedback Voltage | 0.6V ±2% - sets output accuracy and simplifies resistor-divider design for common voltages (e.g., 1.8V with 200k/100k). |
| Quiescent Current | 40µA typical - extends battery runtime in always-on sensor nodes and standby modes. |
| Input Voltage Range | 2.5V to 5.5V - directly powers from single-cell Li+/Li-Po, USB VBUS, or 3× alkaline/NiMH batteries. |
| Shutdown Current | <1µA - isolates input from output during deep sleep, preventing battery drain in off-state. |
| Thermal Shutdown | +150°C activation / +120°C recovery - protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
Package: TSOT25 (5-pin thin shrink small-outline transistor) - 2.9mm × 2.8mm × 1.0mm body, exposed pad for thermal enhancement, JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable control input | Active-high digital enable; >1.5V enables regulation, <0.3V forces shutdown with <1µA supply current. |
| GND | Ground reference | Common return for analog and power circuits; must be connected to low-impedance ground plane. |
| SW | Switch node | Drain connection of internal high-side and low-side MOSFETs; carries high-frequency square-wave voltage (0 to VIN). |
| VIN | Main power input | Supplies internal circuitry and power switches; requires local 10µF ceramic capacitor placed adjacent to pin. |
| FB | Feedback input | Connects to resistor divider midpoint; senses output voltage and compares to 0.6V internal reference for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated N-MOSFET replaces external Schottky diode, eliminating conduction loss and improving full-load efficiency to 95%. |
| Pulse-skipping modulation (PSM) | Reduces switching frequency under light load to maintain >85% efficiency at 1mA output, critical for battery longevity. |
| Soft-start | Digital ramp limits inrush current by stepping switch current to 1.5A over startup, preventing input droop and output overshoot. |
| Over-temperature protection | Thermal shutdown at +150°C with +30°C hysteresis ensures safe recovery before resuming operation. |
| UVLO with hysteresis | Enables only above ~2.5V and holds until VIN drops below ~2.2V, preventing brownout oscillation during battery discharge. |
Applications
| Smartphone Core Rail | Wireless Headset PMU |
|---|---|
|
Use Scenario: Powering application processor I/O or memory interface at 1.8V from single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 1.8V with fast load-transient response to handle CPU burst activity. Use Value: 3MHz switching allows 1µH inductor and 10µF X7R ceramic output cap, reducing solution size by >40% vs. 1MHz alternatives. |
Use Scenario: Supplying Bluetooth SoC and MEMS microphone at 3.3V in compact earbud PCB with limited board area. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured for 3.3V using 540k/120k feedback divider. Use Value: 40µA quiescent current extends standby time beyond 30 days on 100mAh battery, meeting Bluetooth LE specification. |
| Digital Camera Sensor Bias | Portable Medical Glucometer |
|
Use Scenario: Generating clean 2.5V bias for CMOS image sensor analog front-end in battery-powered action camera. IC Role / Device Role / Timing Role: Low-noise step-down regulator operating in PSM mode during idle, switching to PWM during frame capture. Use Value: Integrated synchronous FETs and 0.6V FB reference achieve ±1% output accuracy across temperature, ensuring ADC reference stability. |
Use Scenario: Providing 1.2V for microcontroller and 3.3V for LCD driver in handheld glucose meter powered by two AAA alkaline cells. IC Role / Device Role / Timing Role: Dual-rail support via reconfiguration (1.2V: 100k/100k; 3.3V: 540k/120k) from single adjustable regulator. Use Value: 2.5V–5.5V input range accommodates full alkaline discharge curve (3.2V–1.8V per cell), maintaining regulation until end-of-life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP61100WU-7 | 3.5V–18V input, 1A, 500kHz, 25µA IQ, fixed 3.3V/5V options only | Requires external resistor for adjustability; higher Vin range suits industrial 12V rail, not single-cell Li+ | Select when input exceeds 5.5V or fixed output suffices; not drop-in for PAM2304's 2.5V start-up or adjustable FB. |
| MP2152GQBE-LF-Z | 2.5V–5.5V input, 1A, 2MHz, 30µA IQ, 0.6V FB, same TSOT25 package | Lower switching frequency increases inductor size; identical pinout but different EN polarity (active-low on MP2152) | Valid alternative if layout allows EN signal inversion; verify soft-start timing and load-transient performance match. |
Compared with AP61100WU-7 and MP2152GQBE-LF-Z, the PAM2304AABADJ uniquely combines 3MHz operation, true 2.5V start-up, and active-high EN in TSOT25-enabling smallest total solution size for single-cell Li+ systems where rapid transient response and ultra-low IQ are mandatory.
Availability
PAM2304AABADJ is available at Aetrix Electronics and suitable for smartphone power management, wireless audio devices, portable medical instruments, and battery-powered consumer electronics requiring stable component supply across production lifecycles.
Supply support for PAM2304AABADJ 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 high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The PAM2304 belongs to Diodes' high-frequency synchronous buck converter product line, engineered specifically for space- and battery-constrained portable electronics needing sub-100µA quiescent current and 3MHz switching capability.
FAQ
What is the minimum input voltage required for PAM2304AABADJ to start regulation?
The device begins regulation when VIN exceeds the under-voltage lockout (UVLO) threshold of approximately 2.5V. Below this, the internal reference and control circuitry remain disabled. This 2.5V start-up voltage enables direct operation from partially discharged single-cell Li+ batteries down to 2.7V nominal, supporting extended runtime in portable systems.
Can PAM2304AABADJ be used with ceramic output capacitors?
Yes-ceramic capacitors are explicitly recommended. The datasheet specifies 10µF X5R/X7R ceramics for both input and output, citing their low ESR, high ripple-current rating, and stable capacitance over temperature and bias voltage. Using 10µF ceramic output caps achieves <10mV peak-to-peak ripple at 1A load with 1µH inductor and 3MHz switching.
How does the PAM2304AABADJ behave during output short-circuit conditions?
Under output short, the device limits peak switch current to 1.5A and reduces switching frequency to ~1MHz with minimum duty cycle, limiting average input current to ~200mA. This controlled foldback prevents thermal runaway and allows safe recovery once the fault is removed, without requiring external current-limit circuitry.
Is the TSOT25 package of PAM2304AABADJ thermally adequate for 1A continuous operation?
Yes, but with layout-dependent derating. The TSOT25 package has θJA = 250°C/W on a 2-layer JEDEC board. At TA = 25°C and 1A load, junction temperature rise is ~100°C (assuming 0.4W dissipation), reaching ~125°C-within the +125°C max continuous rating. A 1-inch² copper pour under the exposed pad reduces θJA significantly and is strongly recommended.
PAM2304AABADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
- -
PAM2304AABADJ FAQ
1.How can I place an order for PAM2304AABADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2304AABADJ 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 PAM2304AABADJ reliable?
The price and inventory of PAM2304AABADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2304AABADJ is usually 5 days.
3.What payment methods are accepted for PAM2304AABADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2304AABADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2304AABADJ?
PAM2304AABADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2304AABADJ 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 PAM2304AABADJ?
For technical support, including PAM2304AABADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2304AABADJ requirements.
6.How does Aetrix verify that PAM2304AABADJ is sourced from the original manufacturer or authorized distributors?
All PAM2304AABADJ 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 PAM2304AABADJ meets industry standards.
7.What is the process for return or replacement of PAM2304AABADJ?
All PAM2304AABADJ units undergo pre-shipment inspection (PSI). If there is an issue with PAM2304AABADJ, 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 PAM2304AABADJ part is unused and in its original packaging.
Return procedure for PAM2304AABADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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