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Diodes Incorporated PAM2301CAAB280
- Part No.:
- PAM2301CAAB280
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
PAM2301CAAB280.pdf
- Description:
- IC REG BUCK 2.8V 800MA TSOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,215
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Product details
Overview
PAM2301CAAB280 from Diodes Incorporated is a 800mA synchronous step-down DC-DC converter in TSOT25 package, operating from 2.5V–5.5V input and delivering fixed 2.8V output with 0.6V internal reference, 1.5MHz switching frequency, and 96% peak efficiency-designed for battery-powered portable electronics requiring low quiescent current (40µA typical) and light-load PSM mode.
For engineers reviewing the PAM2301CAAB280 datasheet, PAM2301CAAB280 pinout, PAM2301CAAB280 application, or PAM2301CAAB280 equivalent, key selection criteria include its 2.8V fixed output, EN-controlled shutdown (<0.1µA), integrated P/N-MOSFETs, soft-start, UVLO, and thermal/short-circuit protection-critical for compact, high-efficiency power rails in space-constrained designs.
Technical Context
The PAM2301CAAB280 uses current-mode PWM control with pulse-skipping modulation (PSM) to maintain regulation across load ranges from 1mA to 800mA while minimizing quiescent current under light loads. Its internal 0.6V reference enables precise output voltage setting via external resistive divider or fixed-output variants like this 2.8V version.
It integrates both high-side P-channel and low-side N-channel MOSFETs with RDS(ON) of 0.30Ω and 0.35Ω respectively, enabling synchronous rectification without external diodes. The 1.5MHz oscillator allows use of small 4.7µH inductors and ceramic capacitors, supporting compact PCB layouts with minimal EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V - eliminates need for external feedback resistors and simplifies BOM for stable mid-range rail generation. |
| Max Output Current | 800mA - supports moderate-power microcontrollers, sensors, and RF modules without external boost stages. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single Li+/Li-Po cells, USB 5V, or 3× alkaline/NiMH batteries. |
| Switching Frequency | 1.5MHz (typ) - enables use of sub-5µH inductors and low-ESR ceramic caps for compact, low-profile power solutions. |
| Quiescent Current | 40µA (typ) - extends battery runtime in always-on or sleep-mode applications such as wearables and remote sensors. |
| Efficiency | Up to 96% - reduces thermal load and improves power density in thermally constrained enclosures. |
| Shutdown Current | <0.1µA - ensures negligible battery drain during system standby or deep-sleep states. |
Pinout & Package
Supplied in a 5-pin TSOT25 surface-mount package (2.9mm × 2.8mm × 0.9mm), the PAM2301CAAB280 features exposed thermal pad for enhanced heat dissipation in high-current operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable control input | Logic-high (>1.5V) activates regulator; logic-low (<0.3V) disables output and reduces supply current to <0.1µA. |
| 2 - GND | Power ground reference | Common return path for input, output, and internal circuitry; must be low-impedance connection to minimize noise and thermal rise. |
| 3 - SW | Switch node | Drain connection of internal P- and N-MOSFETs; carries high-frequency square-wave current-requires short, wide trace routing. |
| 4 - VIN | Input power supply | Accepts 2.5–5.5V; requires local 10µF ceramic capacitor placed adjacent to pin to suppress switching transients. |
| 5 - VOUT/FB | Output voltage / feedback | Delivers regulated 2.8V output; internally connected to 0.6V reference-no external resistor network needed for fixed-output variant. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P- and N-channel MOSFETs eliminate external Schottky diode, reducing conduction loss and board area. |
| Pulse-skipping mode (PSM) | Reduces switching frequency under light load to maintain >85% efficiency at 1mA, extending battery life in intermittent-use devices. |
| Internal soft-start | Gradually ramps output voltage over ~1ms to limit inrush current and prevent input rail sag during startup. |
| Comprehensive protection | Includes cycle-by-cycle current limiting (1.5A peak), thermal shutdown (150°C trip, 120°C hysteresis), and UVLO (2.3V threshold). |
| TSOT25 footprint | Standardized 5-pin leadless package with exposed thermal pad-supports automated assembly and efficient thermal transfer to PCB copper. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered environmental sensor transmitting temperature/humidity data via Bluetooth LE every 5 seconds. IC Role / Device Role / Timing Role: Primary 2.8V power rail generator for MCU, BLE SoC, and analog front-end. Use Value: 40µA quiescent current and PSM mode extend CR2032 battery life beyond 12 months; 1.5MHz switching enables compact 2.0×2.0mm inductor placement. | Use Scenario: Handheld pulse oximeter using AAA batteries and driving OLED display + optical sensor array. IC Role / Device Role / Timing Role: Stable 2.8V supply for display driver IC and precision analog signal chain. Use Value: Fixed 2.8V output eliminates feedback resistor tolerance errors; 96% efficiency minimizes self-heating near sensitive optical components. |
| Digital Audio Player | Smart Remote Control |
Use Scenario: Flash-based MP3 player with mono DAC, headphone amp, and microSD interface powered by single Li-ion cell. IC Role / Device Role / Timing Role: Main system voltage regulator stepping down 3.7V nominal battery to clean 2.8V for audio codec and memory interface. Use Value: Low output ripple (<15mVpp) prevents audible noise in headphone output; thermal shutdown protects against sustained high-current playback conditions. | Use Scenario: IR/RF universal remote with touch keypad, BLE pairing, and coin-cell battery (CR2032). IC Role / Device Role / Timing Role: Efficient 2.8V rail for MCU, RF transceiver, and capacitive touch controller during brief active bursts. Use Value: <0.1µA shutdown current preserves shelf life; EN pin enables MCU-controlled power gating between button presses. |
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 | 2.8V fixed output, 300mA max, 3.6MHz switching, 22µA IQ | Lower current rating limits use to ultra-low-power MCU-only rails-not suitable for RF or display loads. | Select when board space is critical and load never exceeds 300mA; verify thermal margin with 0.65mm² thermal pad. |
| RT8059GJ6 | 2.8V fixed output, 600mA max, 1.5MHz, 55µA IQ, no PSM mode | Lacks pulse-skipping-efficiency drops below 80% at 10mA, reducing battery life in duty-cycled systems. | Prefer where cost sensitivity outweighs light-load efficiency; confirm EN pin compatibility with existing GPIO logic levels. |
Compared with TPS62231DRYR and RT8059GJ6, the PAM2301CAAB280 delivers higher output current (800mA vs. ≤600mA), superior light-load efficiency via PSM, and identical 1.5MHz frequency-making it optimal for mixed-signal portable systems needing headroom and extended runtime.
Availability
PAM2301CAAB280 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, digital audio players, and smart remote controls requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for PAM2301CAAB280 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-performance power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The PAM2301 belongs to Diodes' high-efficiency DC-DC converter product line, engineered specifically for battery-powered portable electronics demanding low IQ, small footprint, and robust protection in space- and energy-constrained applications.
FAQ
What is the minimum input voltage required for PAM2301CAAB280 to regulate 2.8V output?
The PAM2301CAAB280 requires a minimum input voltage of 2.5V to maintain regulation at 2.8V output. Below this, under-voltage lockout (UVLO) disables the device to prevent unstable operation or excessive dropout. At VIN = 2.5V, the converter operates near 100% duty cycle with minimal headroom-designers should ensure battery discharge curves remain above 2.5V during full-load operation.
Does PAM2301CAAB280 require external compensation components?
No, the PAM2301CAAB280 uses internal compensation optimized for standard 4.7µH inductors and 10µF ceramic capacitors. Its current-mode architecture provides inherent stability across the full load range without external RC networks-simplifying layout and reducing BOM count compared to voltage-mode regulators requiring loop compensation.
Can the PAM2301CAAB280 be used with ceramic output capacitors?
Yes-the PAM2301CAAB280 is fully compatible with X5R/X7R ceramic capacitors for both input and output. Its synchronous design and internal compensation are validated for low-ESR ceramics, enabling output ripple below 15mVpp with 10µF/0805 case size. Avoid high-voltage-rated Y5V dielectrics due to capacitance loss under DC bias.
How does the EN pin behave during power-up sequencing?
The EN pin has a 1.5V threshold (high) and 0.3V threshold (low), with ±0.01µA leakage. When VIN rises first, the device remains disabled until EN is actively pulled above 1.5V-enabling controlled power sequencing where system MCU asserts EN only after initializing critical peripherals. No external pull-up is required if driven actively.
PAM2301CAAB280 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-25
PAM2301CAAB280 FAQ
1.How can I place an order for PAM2301CAAB280 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2301CAAB280 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 PAM2301CAAB280 reliable?
The price and inventory of PAM2301CAAB280 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2301CAAB280 is usually 5 days.
3.What payment methods are accepted for PAM2301CAAB280?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2301CAAB280 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2301CAAB280?
PAM2301CAAB280 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2301CAAB280 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 PAM2301CAAB280?
For technical support, including PAM2301CAAB280 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2301CAAB280 requirements.
6.How does Aetrix verify that PAM2301CAAB280 is sourced from the original manufacturer or authorized distributors?
All PAM2301CAAB280 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 PAM2301CAAB280 meets industry standards.
7.What is the process for return or replacement of PAM2301CAAB280?
All PAM2301CAAB280 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2301CAAB280, 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 PAM2301CAAB280 part is unused and in its original packaging.
Return procedure for PAM2301CAAB280:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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