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Diodes Incorporated PAM2306AYPBK
- Part No.:
- PAM2306AYPBK
- Manufacturer:
- Diodes Incorporated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
PAM2306AYPBK.pdf
- Description:
- IC REG BCK 1.2V/3.3V DL 12WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,225
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Product details
Overview
PAM2306AYPBK from Diodes Incorporated is a dual-channel, current-mode PWM step-down DC-DC converter in a W-DFN3030-12 (Type US) package. It delivers up to 1A per channel with 1.5MHz switching frequency, 0.6V reference voltage, and integrated synchronous rectifiers. Designed for portable electronics, it supports 2.5V–5.5V input and offers fixed 3.3V/2.8V outputs with <40μA typical quiescent current per channel.
For engineers reviewing the PAM2306AYPBK datasheet, PAM2306AYPBK pinout, PAM2306AYPBK application, or PAM2306AYPBK equivalent, key selection criteria include dual-output voltage configuration (3.3V/2.8V), thermal shutdown at +150°C, UVLO protection, soft-start functionality, and compatibility with ceramic input/output capacitors in space-constrained designs.
Technical Context
The PAM2306AYPBK implements a dual independent current-mode PWM control architecture with automatic pulse-skipping modulation (PSM) under light load to minimize quiescent current. Each channel features separate enable (EN1/EN2), feedback (FB1/FB2), and switch-node (LX1/LX2) terminals, enabling asynchronous operation and flexible power sequencing.
It integrates high-side P-MOSFETs and low-side N-MOSFETs with RDS(ON) of 0.3–0.45Ω (P-ch) and 0.35–0.5Ω (N-ch), supporting 100% duty-cycle operation near dropout. Over-temperature protection triggers at +150°C with +30°C hysteresis, and short-circuit protection limits peak switch current to 1.5A per channel.
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 Voltages | 3.3V (Channel 1), 2.8V (Channel 2) - factory-fixed, eliminating external feedback resistors. |
| Max Output Current | 1A per channel - enables direct powering of core logic, RF modules, and memory subsystems. |
| Switching Frequency | 1.5MHz (typ.) - allows use of compact 2.2µH inductors and reduces output ripple without increasing EMI filtering burden. |
| Quiescent Current | 40µA per channel (typ.) - extends battery runtime in always-on or low-duty-cycle portable devices. |
| Feedback Reference | 0.6V (typ.) - sets output via resistor divider; fixed versions internally configure R1/R2 for precise 3.3V/2.8V regulation. |
| Thermal Shutdown | +150°C activation with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: W-DFN3030-12 (Type US), 3.0mm × 3.0mm × 0.75mm, exposed thermal pad (pins 3 & 9), RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN2 | Power Input (Channel 2) | Supplies Channel 2; must be decoupled locally with ≥10µF ceramic capacitor. |
| 2 LX2 | Switch Node (Channel 2) | Connects to inductor and output capacitor; high dv/dt node requiring tight layout and minimal trace length. |
| 3, 9 Exposed Pad | Ground / Thermal Sink | Must be soldered to large PCB copper area for thermal dissipation (θJA = 60°C/W). |
| 4 FB1 | Feedback (Channel 1) | Monitors regulated 3.3V output; internal divider sets voltage - no external resistors required. |
| 5, 11 NC1, NC2 | No Connection | Unbonded pins; must remain unconnected and unpopulated on PCB. |
| 6 EN1 | Enable (Channel 1, Active High) | Logic-level control (VEH = 1.5V min); ties to system power rail or microcontroller GPIO. |
| 7 VIN1 | Power Input (Channel 1) | Supplies Channel 1; may be tied to VIN2 if both channels share same source. |
| 8 LX1 | Switch Node (Channel 1) | Connects to inductor and output capacitor for 3.3V rail; layout-critical high-frequency node. |
| 10 FB2 | Feedback (Channel 2) | Monitors regulated 2.8V output; internal configuration eliminates external resistor network. |
| 12 EN2 | Enable (Channel 2, Active High) | Independent logic control for 2.8V rail; supports staggered startup or dynamic power gating. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM regulators | Enables simultaneous, isolated 3.3V and 2.8V rails for mixed-voltage SoC or peripheral subsystems. |
| Synchronous rectification | Eliminates external Schottky diodes, reducing conduction loss and improving efficiency to 96% at full load. |
| Soft-start circuitry | Gradually ramps switch current to limit inrush, preventing input voltage sag and output overshoot at power-up. |
| Under-voltage lockout (UVLO) | Disables operation below ~2.3V input, protecting batteries from deep discharge and ensuring clean reset behavior. |
| Short-circuit foldback | Reduces average input current to ~200mA during output short, limiting power dissipation and enabling safe recovery. |
Applications
| Smartphone Baseband Power | Wireless Modem Core Supply |
|---|---|
|
Use Scenario: Dual-rail power delivery to baseband processor and RF transceiver in compact smartphone PCBs. IC Role / Device Role / Timing Role: Primary dual-output DC-DC regulator providing stable 3.3V (I/O, memory interface) and 2.8V (RF LNA, PA bias) rails. Use Value: Integrated synchronous FETs and 1.5MHz operation allow <3mm² solution size while maintaining >92% efficiency across 10mA–1A load range. |
Use Scenario: Power management for DSL/wireless broadband modems requiring tightly regulated auxiliary voltages. IC Role / Device Role / Timing Role: Independent channel control enables sequenced power-up of PHY and MAC subsystems to meet IEEE 802.3af timing constraints. Use Value: EN1/EN2 pins support firmware-controlled rail enable/disable, reducing standby power to <0.2µA total system quiescent current. |
| Portable Medical Sensor Hub | Industrial Handheld Terminal |
|
Use Scenario: Battery-powered wearable sensor aggregator with analog front-end, BLE radio, and display driver. IC Role / Device Role / Timing Role: Central power IC delivering 3.3V to MCU and BLE SoC, and 2.8V to precision ADC and op-amp signal chain. Use Value: 40µA/channel quiescent current extends coin-cell or Li-Po battery life to >6 months in sleep mode with periodic wake-up sampling. |
Use Scenario: Ruggedized handheld terminal operating from 3×AA alkaline cells (4.5V) or USB port (5V). IC Role / Device Role / Timing Role: Input voltage flexibility (2.5–5.5V) and UVLO prevent brownout resets during battery depletion or transient USB disconnect. Use Value: Thermal shutdown and short-circuit protection ensure reliable operation in hot industrial environments without external supervision circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | Single-channel, 3A output; requires external feedback resistors for adjustable VOUT; no fixed 3.3V/2.8V option. | Not pin-compatible; needs redesign for dual-rail support using two ICs or added LDO post-regulation. | Choose when higher current per rail (>1A) or programmable output is required; adds BOM and layout complexity. |
| RT8059ZSP | Dual-channel, but only supports identical output voltages (e.g., 3.3V/3.3V); lacks independent EN/FB per channel. | Cannot deliver asymmetric rails (3.3V/2.8V); unsuitable for mixed-voltage SoC interfaces requiring differential supply domains. | Choose only if both rails require same voltage and shared enable is acceptable; lower cost but less flexible. |
Compared with TPS62130ARGTR and RT8059ZSP, the PAM2306AYPBK provides factory-configured asymmetric outputs, true per-channel enable/feedback isolation, and smaller footprint - making it optimal for space- and power-constrained dual-rail systems where voltage differentiation and layout simplicity are critical.
Availability
PAM2306AYPBK is available at Aetrix Electronics and suitable for smartphone baseband power, wireless modem core supply, and portable medical sensor hub applications requiring stable component supply, long-lifecycle availability, and automotive-grade traceability.
Supply support for PAM2306AYPBK 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 power management ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The PAM2306 belongs to Diodes' Power Management portfolio, engineered specifically for high-efficiency, low-quiescent-current DC-DC conversion in battery-powered portable electronics with strict size and thermal constraints.
FAQ
What input voltage range does the PAM2306AYPBK support, and how does it handle dropout conditions?
The PAM2306AYPBK operates from 2.5V to 5.5V input. As VIN approaches the output voltage, it enters 100% duty-cycle mode where VOUT ≈ VIN − ILOAD × (RDS(ON) + RL). Its P-channel high-side switch enables efficient near-dropout regulation without external components, maintaining regulation down to ~2.7V input for 2.8V output.
Can the PAM2306AYPBK's output voltages be adjusted, or are they strictly fixed?
PAM2306AYPBK is a factory-configured fixed-output variant: Channel 1 delivers 3.3V and Channel 2 delivers 2.8V. These values are set by internal resistor dividers tied to the 0.6V reference; no external feedback resistors are needed or supported. Adjustable versions (e.g., PAM2306AYPA) exist but require different part numbers and pin configurations.
How does the thermal pad (pins 3 & 9) impact PCB layout and thermal performance?
The exposed thermal pad must be soldered to a minimum 100mm² copper pour connected directly to GND. This reduces θJA from 60°C/W to ≤45°C/W in optimized layouts, enabling continuous 1A operation at +85°C ambient. Omitting or undersizing the pad risks thermal shutdown above 600mA load at elevated temperatures.
Does the PAM2306AYPBK support forced PWM mode, or is pulse-skipping modulation mandatory under light load?
The PAM2306AYPBK automatically transitions between constant-frequency PWM (heavy load) and pulse-skipping modulation (PSM) under light load - no external control is provided to force PWM-only operation. PSM reduces quiescent current to 40µA/channel, optimizing battery life; forced PWM would increase IQ by >10× and is not supported by this device variant.
PAM2306AYPBK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V, 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- W-DFN3030-12
PAM2306AYPBK FAQ
1.How can I place an order for PAM2306AYPBK through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2306AYPBK 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 PAM2306AYPBK reliable?
The price and inventory of PAM2306AYPBK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2306AYPBK is usually 5 days.
3.What payment methods are accepted for PAM2306AYPBK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2306AYPBK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2306AYPBK?
PAM2306AYPBK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2306AYPBK 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 PAM2306AYPBK?
For technical support, including PAM2306AYPBK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2306AYPBK requirements.
6.How does Aetrix verify that PAM2306AYPBK is sourced from the original manufacturer or authorized distributors?
All PAM2306AYPBK 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 PAM2306AYPBK meets industry standards.
7.What is the process for return or replacement of PAM2306AYPBK?
All PAM2306AYPBK units undergo pre-shipment inspection (PSI). If there is an issue with PAM2306AYPBK, 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 PAM2306AYPBK part is unused and in its original packaging.
Return procedure for PAM2306AYPBK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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