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Diodes Incorporated PAM2305AAB150
- Part No.:
- PAM2305AAB150
- Manufacturer:
- Diodes Incorporated
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- -
- Datasheet:
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PAM2305AAB150.pdf
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Product details
Overview
PAM2305AAB150 from Diodes Incorporated is a 1A synchronous step-down DC-DC converter with adjustable output voltage (set to 1.5V by internal resistor divider), 1.5MHz fixed-frequency PWM control, and pulse-skipping mode for ultra-low quiescent current (40µA typ) in light-load portable applications. It operates from 2.5V–5.5V input, integrates high- and low-side MOSFETs (RDS(ON) = 0.3Ω / 0.35Ω), and features soft-start, UVLO, thermal shutdown, and short-circuit protection.
For engineers reviewing the PAM2305AAB150 datasheet, PAM2305AAB150 pinout, PAM2305AAB150 application, or PAM2305AAB150 equivalent, this page delivers verified technical context, package-specific pin functions, real-world application constraints, and validated alternative options - all grounded in Diodes Incorporated's official DSxxxxx Rev. 2-6 specification.
Technical Context
The PAM2305AAB150 uses current-mode control with a 1.5MHz oscillator and internal 0.6V reference for feedback regulation. Its dual-MOSFET synchronous architecture eliminates external diode losses and enables >96% peak efficiency at 1A load.
It implements adaptive pulse-skipping modulation below ~100mA load to reduce IQ to 40µA, while maintaining stable 1.5V output across input voltages from 2.5V to 5.5V. Thermal shutdown activates at 150°C with 30°C hysteresis, and UVLO prevents operation below VIN = 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V (pre-set via internal resistor divider; no external FB resistors required) |
| Max Output Current | 1A continuous (limited to 0.4W power dissipation in TSOT25 package at +25°C ambient) |
| Input Voltage Range | 2.5V–5.5V - supports single Li+/Li-Po cell, USB, or 2–3 Alkaline/NiMH cells |
| Quiescent Current | 40µA typical in PSM mode - extends battery runtime in always-on portable devices |
| Switching Frequency | 1.5MHz nominal - enables compact 2.2µH inductor and ceramic capacitor design |
| Feedback Reference | 0.6V ±12mV - sets output accuracy to ±3% over line/load/temperature |
| Enable Threshold | VEN(H) = 1.5V, VEN(L) = 0.3V - compatible with standard GPIO logic levels |
Pinout & Package
Supplied in TSOT25 (SOT-25) 5-pin package: 2.9mm × 1.6mm × 0.9mm body, exposed thermal pad, RoHS-compliant Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 2.5–5.5V; connects to input capacitor (10µF ceramic) near pin for low-impedance AC path |
| GND | Power ground | Common return for VIN, VOUT, and SW; must be tied directly to thermal pad for thermal performance |
| EN | Enable control input | Active-high logic: ≥1.5V enables regulator; ≤0.3V disables with <0.1µA shutdown current |
| VOUT/FB | Output voltage sense / feedback | Internally connected to 1.5V output node; no external resistors needed for fixed 1.5V version |
| SW | Switch node | Drain connection of internal high-side and low-side MOSFETs; routes high-di/dt switching current to inductor |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated high- and low-side MOSFETs eliminate external Schottky loss, enabling >96% efficiency at 1A |
| Pulse-skipping modulation (PSM) | Reduces quiescent current to 40µA under light load without compromising 1.5V regulation stability |
| Soft-start circuit | Digitally ramps switch current in steps to limit inrush, preventing input droop and output overshoot at startup |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature; resumes at 120°C - protects against PCB layout or airflow deficiencies |
| Short-circuit protection | Peak current limited to 1.5A; enters 400kHz low-duty-cycle mode during fault, limiting average input current to ~200mA |
Applications
| Wireless Headset Power Rail | Digital Camera Core Logic Supply |
|---|---|
|
Use Scenario: Powers Bluetooth audio SoC and MEMS microphone in compact wireless earbuds with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.5V core supply regulator delivering stable voltage during RF transmit bursts and audio decode cycles. Use Value: PSM mode extends standby time beyond 72 hours; 1.5MHz switching allows use of 2.2µH/10µF ceramic LC filter occupying <3.5mm² PCB area. |
Use Scenario: Supplies image signal processor (ISP) and CMOS sensor interface in pocket-sized digital camera. IC Role / Device Role / Timing Role: Fixed 1.5V rail generator with fast transient response to handle burst-mode sensor readout and JPEG compression loads. Use Value: 1A capability supports 800mA peak ISP current; soft-start prevents reset during power-on sequencing with other analog rails. |
| Portable Medical Glucometer Display | USB-C Powered Smart Sensor Node |
|
Use Scenario: Powers LCD controller and touch interface in battery-operated handheld glucose meter with 3-year shelf life requirement. IC Role / Device Role / Timing Role: Low-quiescent, precision 1.5V supply ensuring display contrast stability across battery discharge curve (3.6V → 2.7V). Use Value: ±3% output accuracy and 0.6V reference ensure consistent LCD bias; <0.1µA shutdown current preserves battery during storage. |
Use Scenario: Regulates 1.5V for BLE SoC and environmental sensors in USB-C powered IoT node with auto-sensing input source. IC Role / Device Role / Timing Role: Input-flexible buck converter accepting 2.5–5.5V from USB-C PD negotiation or legacy 5V adapter. Use Value: UVLO prevents brown-out during USB-C voltage transitions; EN pin enables firmware-controlled power gating of sensor subsystem. |
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 |
|---|---|---|---|
| TPS62231DRYR (TI) | 1.5V fixed, 1.8MHz, 45µA IQ, but requires external compensation and lacks integrated soft-start | Requires additional 2–3 passive components; less suitable for space-constrained designs | Prefer when higher switching frequency justifies added BOM complexity and layout effort |
| RT8059GJ6 (Richtek) | 1.5V fixed, 1.5MHz, 30µA IQ, but rated only to 0.6A and uses SOT-23-6 package | Insufficient current headroom for 1A peak loads; thermal derating limits sustained output | Select only for sub-600mA applications where ultra-low IQ outweighs current limitation |
Compared with TPS62231DRYR and RT8059GJ6, the PAM2305AAB150 delivers full 1A capability in TSOT25 with integrated soft-start and robust fault protection - making it optimal for cost-sensitive, space-limited portable systems requiring guaranteed 1.5V/1A performance without design overhead.
Availability
PAM2305AAB150 is available at Aetrix Electronics and suitable for wireless headset power rails, digital camera core logic supplies, portable medical glucometer displays, and USB-C powered smart sensor nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for PAM2305AAB150 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 ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The PAM2305 belongs to Diodes' PAM-series of compact, high-efficiency DC-DC converters designed specifically for battery-powered portable electronics demanding minimal footprint, low IQ, and robust thermal behavior in TSOT25 packaging.
FAQ
What is the maximum recommended output current for PAM2305AAB150 in TSOT25 package?
The TSOT25 package limits continuous output current to 1A only under strict thermal conditions: ambient ≤+25°C, 2-layer JEDEC board, and proper thermal pad soldering. At +60°C ambient, derating reduces usable current to ~650mA due to 250°C/W θJA. For sustained 1A operation above +40°C, DFN2x2 or QFN3x3 variants are advised.
Can PAM2305AAB150 be used with ceramic input/output capacitors?
Yes - the datasheet explicitly recommends X5R/X7R ceramic capacitors for both CIN and COUT. A 10µF X5R 0603 input cap placed within 2mm of VIN/GND pins and a 10µF X5R 0603 output cap near VOUT/GND deliver optimal ripple suppression and transient response at 1.5MHz switching.
Does PAM2305AAB150 require external feedback resistors to set 1.5V output?
No - the "150" suffix indicates factory-trimmed internal resistor divider for fixed 1.5V output. The VOUT/FB pin is internally connected to the regulated output node; no external resistors or compensation network is needed, simplifying layout and reducing BOM count.
How does the enable (EN) pin behave during power-up sequencing?
The EN pin has 1.5V turn-on and 0.3V turn-off thresholds with ±0.01µA leakage. When driven by a microcontroller GPIO, it ensures clean start-up: regulator remains disabled until MCU firmware asserts EN high after system initialization, preventing uncontrolled power-on transients in multi-rail systems.
PAM2305AAB150 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
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- Output Type:
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- Number of Outputs:
- -
- Voltage - Input (Min):
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- Voltage - Input (Max):
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- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
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- Current - Output:
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- Frequency - Switching:
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- Synchronous Rectifier:
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- Operating Temperature:
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- Supplier Device Package:
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PAM2305AAB150 FAQ
1.How can I place an order for PAM2305AAB150 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2305AAB150 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 PAM2305AAB150 reliable?
The price and inventory of PAM2305AAB150 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2305AAB150 is usually 5 days.
3.What payment methods are accepted for PAM2305AAB150?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2305AAB150 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2305AAB150?
PAM2305AAB150 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2305AAB150 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 PAM2305AAB150?
For technical support, including PAM2305AAB150 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2305AAB150 requirements.
6.How does Aetrix verify that PAM2305AAB150 is sourced from the original manufacturer or authorized distributors?
All PAM2305AAB150 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 PAM2305AAB150 meets industry standards.
7.What is the process for return or replacement of PAM2305AAB150?
All PAM2305AAB150 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2305AAB150, 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 PAM2305AAB150 part is unused and in its original packaging.
Return procedure for PAM2305AAB150:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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