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Diodes Incorporated PAM2301CAABADJ
- Part No.:
- PAM2301CAABADJ
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
PAM2301CAABADJ.pdf
- Description:
- IC REG BUCK ADJ 800MA TSOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,600
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Product details
Overview
PAM2301CAABADJ from Diodes Incorporated is a current-mode, synchronous step-down DC-DC converter delivering up to 800mA output current with 1.5MHz fixed switching frequency, 0.6V reference voltage, and adjustable output (0.6V to VIN). It integrates high- and low-side MOSFETs in a TSOT25 package and supports input voltages from 2.5V to 5.5V-ideal for single-cell Li+/Li-polymer or USB-powered portable electronics.
For engineers reviewing the PAM2301CAABADJ datasheet, PAM2301CAABADJ pinout, PAM2301CAABADJ application, or PAM2301CAABADJ equivalent, key selection criteria include its 40μA quiescent current in PSM mode, 96% peak efficiency, under-voltage lockout threshold, soft-start behavior, and thermal shutdown at +150°C.
Technical Context
The PAM2301CAABADJ uses current-mode PWM control for stable regulation and fast transient response at heavy loads, while automatically transitioning to pulse-skipping modulation (PSM) under light load to minimize quiescent current. Its internal 0.6V reference enables precise output setting via external resistor divider on the VOUT/FB pin.
It features cycle-by-cycle overcurrent protection with 1.5A peak switch current limit, thermal shutdown with 30°C hysteresis, and UVLO that holds operation until VIN exceeds ~2.3V. The EN pin provides logic-level enable/disable control with 1.5V high-threshold and 0.3V low-threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single Li+/Li-polymer cell, USB 5V, or multi-cell alkaline/NiMH sources |
| Output Voltage Range | 0.6V to VIN - adjustable via external resistive divider; FB pin references internal 0.6V bandgap |
| Max Output Current | 800mA - sustained continuous load capability with thermal derating above +85°C ambient |
| Switching Frequency | 1.5MHz (typ) - enables compact external LC filter design with 1–4.7µH inductors |
| Quiescent Current | 40µA (typ) - achieved in PSM mode at light load, extending battery runtime in standby |
| Efficiency | Up to 96% - realized using integrated synchronous rectifier and low RDS(ON) MOSFETs (0.3Ω/0.35Ω) |
| Shutdown Current | <0.1µA - disconnects input from output; EN pin pulls device into ultra-low-power state |
Pinout & Package
Package: TSOT25 - 5-pin, 2.9mm × 2.8mm × 1.0mm thin shrink small-outline transistor with exposed thermal pad (not electrically connected), RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable control input | Logic-high (>1.5V) enables regulator; logic-low (<0.3V) disables output and reduces supply current to <0.1µA |
| 2 - GND | Power and signal ground reference | Common return path for internal circuitry, power switches, and feedback network; must be low-impedance |
| 3 - SW | Switch node | Drain connection of internal high- and low-side MOSFETs; carries high di/dt square-wave voltage; requires tight layout |
| 4 - VIN | Main power input | Supplies internal bias and power switches; requires local 10µF ceramic capacitor placed adjacent to pin |
| 5 - VOUT/FB | Output voltage sense / feedback input | Monitors regulated output via external resistor divider; internal error amplifier compares to 0.6V reference |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated N-channel MOSFET replaces external Schottky diode, eliminating conduction loss and improving efficiency by ~5–10% |
| Pulse-skipping modulation (PSM) | Reduces quiescent current to 40µA at light load without compromising regulation accuracy or stability |
| Internal soft-start | Gradually ramps output voltage over ~1ms to limit inrush current and prevent input rail sag or overshoot |
| Thermal shutdown with hysteresis | Shuts down at +150°C junction temperature and re-enables only after cooling to +120°C, preventing thermal cycling |
| Short-circuit foldback | Limits average input current to ~200mA during output short, enabling safe recovery without latch-off or damage |
Applications
| Wearable Health Monitor | USB-Powered IoT Sensor Node |
|---|---|
Use Scenario: Compact wearable device powered by a single 3.7V Li-polymer cell, requiring regulated 1.8V for MCU and 3.3V for BLE radio. IC Role / Device Role / Timing Role: Primary step-down regulator providing dual-rail power with dynamic load switching between active and sleep states. Use Value: 40µA quiescent current extends battery life in sleep mode; 1.5MHz switching allows miniature 2.2µH inductor and 10µF ceramic caps. |
Use Scenario: Battery-backed environmental sensor node drawing intermittent 500mA bursts for Wi-Fi transmission, powered via USB or CR2032 + boost. IC Role / Device Role / Timing Role: Efficient buck converter stepping 5V USB down to 3.3V for microcontroller and RF transceiver. Use Value: 96% peak efficiency minimizes self-heating; PSM mode maintains regulation at µA-level sensor idle current. |
| Portable Medical Glucometer | Digital Audio Player Front-End |
Use Scenario: Handheld glucometer using AAA alkaline cells (up to 4.5V) to power analog front-end, LCD, and ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Adjustable-output buck supplying 1.2V core voltage and 3.3V I/O rail from variable input. Use Value: Input range 2.5–5.5V accommodates full alkaline discharge curve; UVLO prevents deep battery drain below 2.3V. |
Use Scenario: Portable audio player with 3.7V Li-ion battery powering DAC, headphone amp, and display controller. IC Role / Device Role / Timing Role: High-efficiency buck generating clean 1.8V analog supply for DAC and 3.3V digital rail. Use Value: Synchronous topology eliminates diode forward drop; low EMI due to fixed-frequency PWM aids audio noise immunity. |
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 |
|---|---|---|---|
| MP2158GQ-Z (Monolithic Power) | Higher 2MHz switching frequency; 600mA rated output; no PSM mode - uses forced PWM only | Limited light-load efficiency; better suited for constant medium-load applications like always-on sensors | Select when board space is critical and light-load efficiency is secondary to EMI filtering simplicity |
| TPS62231DRYR (Texas Instruments) | 3MHz switching; 600mA output; 17µA quiescent current; integrated soft-start and power-good | Lower IQ improves ultra-low-power standby but reduced max current limits peak RF burst support | Prefer for energy-harvesting or coin-cell–powered systems where <20µA IQ outweighs 800mA capability |
Compared with MP2158GQ-Z and TPS62231DRYR, the PAM2301CAABADJ delivers higher output current (800mA vs. ≤600mA), retains PSM for best-in-class light-load efficiency at 40µA, and offers wider input range (2.5–5.5V), making it optimal for USB- and single-cell–powered portable designs requiring robust transient response.
Availability
PAM2301CAABADJ is available at Aetrix Electronics and suitable for wearable health monitors, USB-powered IoT sensor nodes, portable medical glucometers, and digital audio player front-ends requiring stable component supply across production volumes and lifecycle phases.
Supply support for PAM2301CAABADJ 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 power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The PAM2301 belongs to Diodes' high-efficiency, low-IQ DC-DC converter product line, designed specifically for battery-constrained portable electronics requiring extended runtime and compact power solutions.
FAQ
What is the minimum recommended output capacitor for stable operation?
The PAM2301CAABADJ requires a minimum 10µF ceramic output capacitor with X5R or X7R dielectric to ensure loop stability and limit output ripple. Lower capacitance may cause instability or excessive ripple, especially at light loads. ESR should be ≤20mΩ for optimal transient response and thermal performance.
Can the PAM2301CAABADJ operate in 100% duty cycle mode?
Yes - when VIN approaches VOUT, the PAM2301CAABADJ enters 100% duty cycle mode, turning on the P-channel MOSFET continuously. Output voltage then equals VIN minus the IRDS(ON) drop across the high-side switch and inductor DCR, enabling near-dropout regulation down to ~2.5V input.
How does the EN pin behave during power-up sequencing?
The EN pin must rise above 1.5V after VIN exceeds the UVLO threshold (~2.3V) to initiate startup. If EN rises before VIN is valid, the device remains disabled until both conditions are met. This supports controlled power sequencing in multi-rail systems without external delay circuits.
Is the TSOT25 package thermally enhanced?
No - the TSOT25 package has no exposed thermal pad. Its θJA is 250°C/W, limiting continuous 800mA operation to ≤+65°C ambient with adequate PCB copper area. For higher ambient or sustained load, thermal relief via 2–4 cm² of 2oz copper connected to GND is strongly recommended.
PAM2301CAABADJ 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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
PAM2301CAABADJ FAQ
1.How can I place an order for PAM2301CAABADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2301CAABADJ 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 PAM2301CAABADJ reliable?
The price and inventory of PAM2301CAABADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2301CAABADJ is usually 5 days.
3.What payment methods are accepted for PAM2301CAABADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2301CAABADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2301CAABADJ?
PAM2301CAABADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2301CAABADJ 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 PAM2301CAABADJ?
For technical support, including PAM2301CAABADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2301CAABADJ requirements.
6.How does Aetrix verify that PAM2301CAABADJ is sourced from the original manufacturer or authorized distributors?
All PAM2301CAABADJ 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 PAM2301CAABADJ meets industry standards.
7.What is the process for return or replacement of PAM2301CAABADJ?
All PAM2301CAABADJ units undergo pre-shipment inspection (PSI). If there is an issue with PAM2301CAABADJ, 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 PAM2301CAABADJ part is unused and in its original packaging.
Return procedure for PAM2301CAABADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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