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Diodes Incorporated PAM2312AABADJ-DB
- Part No.:
- PAM2312AABADJ-DB
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
PAM2312AABADJ-DB.pdf
- Description:
- IC REG TSOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
PAM2312AABADJ-DB from Diodes Incorporated is a 1A synchronous step-down DC-DC converter with current-mode PWM/PSM control, 0.6V to 5.5V adjustable output, 1.5MHz switching frequency, and TSOT25 package. It delivers up to 96% efficiency in portable battery-powered systems such as wireless handsets and digital frames.
For engineers reviewing the PAM2312AABADJ-DB datasheet, PAM2312AABADJ-DB pinout, PAM2312AABADJ-DB application, or PAM2312AABADJ-DB equivalent, key selection criteria include input voltage range (2.5–5.5V), quiescent current (40µA typ.), shutdown current (<1µA), feedback reference (0.6V), and thermal shutdown threshold (+150°C).
Technical Context
The PAM2312AABADJ-DB employs a current-mode control architecture with integrated P-channel and N-channel MOSFETs, enabling high-efficiency synchronous buck conversion. Its dual-mode operation-PWM at heavy loads and pulse-skipping modulation (PSM) at light loads-optimizes efficiency across load ranges from 0.1mA to 1A.
It features an internal 0.6V reference, soft-start circuitry limiting inrush current, cycle-by-cycle peak current limiting (1.5A typical), and under-voltage lockout (UVLO) with hysteresis. The device operates over –40°C to +85°C ambient and supports adjustable output via external resistor divider on the VOUT/FB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single Li+/Li-Po cell, USB, or multi-cell alkaline/NiMH sources. |
| Output Voltage Range | 0.6V to VIN - adjustable via external resistive divider; 0.6V internal reference enables precise low-VOUT regulation. |
| Max Output Current | 1A continuous - limited by thermal dissipation in TSOT25 package (PD ≤ 400mW at TA = 25°C). |
| Switching Frequency | 1.5MHz (typ.) - enables compact external components (e.g., 4.7µH inductor, 10µF ceramic caps). |
| Quiescent Current | 40µA (typ.) - ensures minimal battery drain during light-load PSM mode in portable applications. |
| Feedback Reference | 0.6V ±12mV - defines output accuracy; line/load regulation ≤0.5%/V and ≤1.5% respectively. |
| Shutdown Current | <1µA - disconnects input from output, preserving battery charge during system sleep. |
Pinout & Package
Package: TSOT25 - thermally enhanced 5-pin thin shrink small-outline transistor package (2.9mm × 2.8mm × 1.0mm), RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 4) | Main power input | Accepts 2.5–5.5V supply; feeds internal power switches and bias circuitry. |
| GND (Pin 2) | Power and signal reference | Common return path for input/output currents and internal control logic. |
| EN (Pin 1) | Enable control input | Logic-high (>1.5V) enables regulator; logic-low (<0.3V) disables with <1µA shutdown current. |
| SW (Pin 3) | Switch node | Drain connection of internal P- and N-MOSFETs; connects to external inductor and catch diode/capacitor. |
| VOUT/FB (Pin 5) | Output voltage sense / feedback | Monitors regulated output via external resistor divider; compares to 0.6V internal reference. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P- and N-channel MOSFETs eliminate external diode, reducing conduction loss and improving efficiency to 96%. |
| Pulse-skipping modulation (PSM) | Reduces quiescent current to 40µA typ. at light loads, extending battery life in standby modes. |
| Thermal shutdown & OTP hysteresis | Shuts down at TJ ≥ +150°C and resumes at TJ ≤ +120°C, preventing permanent damage during overload or poor heatsinking. |
| Short-circuit protection | Peak current limit of 1.5A (typ.) with 500kHz fallback frequency limits average input current to ~200mA during fault. |
| Soft-start | Digital-controlled ramp-up of switch current prevents input voltage sag and output overshoot at startup. |
Applications
| Wireless Handset Power | Digital Photo Frame |
|---|---|
|
Use Scenario: Regulating battery voltage to stable 1.8V or 3.3V for baseband processor and display driver ICs in compact cellular handsets. IC Role / Device Role / Timing Role: Primary step-down power supply delivering clean, efficient DC power with fast transient response to dynamic load changes. Use Value: Enables >96% efficiency and <40µA quiescent current, directly extending talk time and standby duration per charge cycle. |
Use Scenario: Providing adjustable 1.2V–3.3V rail for LCD controller and microcontroller in battery- or USB-powered digital frames. IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting multiple panel voltage requirements from a single Li-ion cell. Use Value: Eliminates need for multiple fixed-output regulators; 1.5MHz switching allows use of tiny 4.7µH inductors and 0603-size ceramics. |
| USB-Powered Peripherals | Electronic Scale MCU Supply |
|
Use Scenario: Converting 5V USB input to 3.3V for Wi-Fi/BLE modules and sensors in portable peripherals like barcode scanners. IC Role / Device Role / Timing Role: Input-capable buck regulator with UVLO and short-circuit protection, ensuring robust operation from noisy USB sources. Use Value: Withstands USB voltage transients and maintains regulation down to 2.5V input, supporting brown-out resilience during cable flex or source instability. |
Use Scenario: Generating stable 1.8V supply for ultra-low-power 16-bit ADC and ARM Cortex-M0+ MCU in precision weighing instruments. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current DC-DC converter powering analog front-end and digital core simultaneously. Use Value: 0.6V reference and tight load regulation (≤1.5%) ensure accurate ADC reference stability; <1µA shutdown preserves battery for months in sleep mode. |
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 |
|---|---|---|---|
| MP2152GQZ-P | Higher 2MHz switching frequency; lower 25µA IQ; requires external compensation network. | Better suited for space-constrained designs needing smaller inductors; less tolerant of layout parasitics due to higher fSW. | Select when PCB area is critical and design team has experience tuning loop compensation. |
| TPS62231DRYR | Fixed 1.8V/3.3V variants only; no ADJ option; 1.8MHz fSW; 17µA IQ; integrated soft-start. | Limited to fixed outputs; lacks resistor-programmable flexibility; optimized for TI ecosystem integration. | Choose only if fixed output matches system requirement and TI's WEBENCH support is preferred. |
Compared with MP2152GQZ-P and TPS62231DRYR, the PAM2312AABADJ-DB offers unique adjustability across 0.6V–VIN, industry-leading 1A capability in TSOT25, and proven PSM/PWM hybrid efficiency without external compensation-making it optimal for cost-sensitive, battery-life-critical portable designs requiring full output flexibility.
Availability
PAM2312AABADJ-DB is available at Aetrix Electronics and suitable for wireless handsets, digital photo frames, USB-powered peripherals, and electronic scales requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for PAM2312AABADJ-DB 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 computing markets.
The PAM2312 belongs to Diodes' PAM-series of synchronous buck converters designed specifically for portable battery-powered applications demanding high efficiency, ultra-low quiescent current, and minimal external component count.
FAQ
What is the minimum recommended input voltage for reliable startup?
The PAM2312AABADJ-DB requires VIN ≥ 2.5V to guarantee proper operation, including UVLO release and stable regulation. Startup is not assured below this threshold, as the internal bias circuitry and gate drivers may not activate reliably. Below 2.5V, the device remains in UVLO state regardless of EN pin status.
Can the PAM2312AABADJ-DB operate in 100% duty cycle mode?
Yes - when VIN approaches VO, the P-channel MOSFET remains fully on, resulting in dropout operation where VO ≈ VIN − IOUT × RDS(ON)_P. In this mode, output regulation is lost, but the device continues to pass current with minimal voltage drop (RDS(ON)_P ≈ 0.3Ω typ.), enabling seamless transition near input-output crossover.
How does the VOUT/FB pin function in adjustable configurations?
The VOUT/FB pin senses the divided output voltage through an external resistor divider (R1/R2). The internal error amplifier compares this voltage to the 0.6V reference and adjusts duty cycle to maintain VO = 0.6V × (1 + R1/R2). The pin must be connected directly to the top of R1, with R2 tied to GND and COUT's positive terminal, per layout guidelines.
Is thermal derating required for continuous 1A operation?
Yes - at TA = 25°C, the TSOT25 package's θJA = 250°C/W limits continuous 1A output to cases with adequate copper area and airflow. For sustained 1A loads, junction temperature must stay ≤125°C; at 25°C ambient, maximum allowable power dissipation is 400mW. Layout with ≥1 cm² of 2oz copper under the exposed pad is strongly recommended.
PAM2312AABADJ-DB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- 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:
- Surface Mount
- Supplier Device Package:
- TSOT-25
PAM2312AABADJ-DB FAQ
1.How can I place an order for PAM2312AABADJ-DB through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2312AABADJ-DB 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 PAM2312AABADJ-DB reliable?
The price and inventory of PAM2312AABADJ-DB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2312AABADJ-DB is usually 5 days.
3.What payment methods are accepted for PAM2312AABADJ-DB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2312AABADJ-DB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2312AABADJ-DB?
PAM2312AABADJ-DB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2312AABADJ-DB 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 PAM2312AABADJ-DB?
For technical support, including PAM2312AABADJ-DB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2312AABADJ-DB requirements.
6.How does Aetrix verify that PAM2312AABADJ-DB is sourced from the original manufacturer or authorized distributors?
All PAM2312AABADJ-DB 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 PAM2312AABADJ-DB meets industry standards.
7.What is the process for return or replacement of PAM2312AABADJ-DB?
All PAM2312AABADJ-DB units undergo pre-shipment inspection (PSI). If there is an issue with PAM2312AABADJ-DB, 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 PAM2312AABADJ-DB part is unused and in its original packaging.
Return procedure for PAM2312AABADJ-DB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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