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Diodes Incorporated PAM2401SCADJ
- Part No.:
- PAM2401SCADJ
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PAM2401SCADJ.pdf
- Description:
- IC REG BOOST ADJ 1A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:46,172
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Product details
Overview
PAM2401SCADJ from Diodes Incorporated is a 1.0MHz current-mode step-up DC-DC converter with true output disconnect, programmable current limit (1.0–3.0A), adjustable output voltage (2.5–5.0V), and Pulse Skip Mode for light-load efficiency. It integrates 0.10Ω N-channel and 0.15Ω P-channel MOSFETs and targets portable battery-powered systems requiring stable 5V rail generation from single-cell Li-ion or alkaline sources.
For engineers reviewing the PAM2401SCADJ datasheet, PAM2401SCADJ pinout, PAM2401SCADJ application, or PAM2401SCADJ equivalent, key selection criteria include startup voltage (1.0V min), shutdown current (<1µA), PG indicator functionality, and MSOP-8 thermal performance (ΘJA = 180°C/W).
Technical Context
The PAM2401SCADJ employs fixed-frequency current-mode control with internal compensation and soft-start, enabling stable regulation across 0.9–4.75V input and 2.5–5.0V output ranges. Its synchronous rectification architecture uses discrete N- and P-channel MOSFETs with RDS(ON) of 100–170mΩ and 150–250mΩ respectively.
Under light load, it transitions to Pulse Skip Mode (PSM) with 150µA quiescent current, while hiccup-mode short-circuit protection and overvoltage/overtemperature safeguards ensure robust operation. The FB pin regulates at 0.6V ±2%, supporting precise external resistor-divider programming of VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.0 MHz ±20% - Enables compact 1.5–2.2µH inductor and low-profile ceramic capacitors. |
| Input Voltage Range | 0.9 V to 4.75 V - Supports single-cell Li-ion (2.7–4.2V), NiMH (0.9–1.4V/cell), or alkaline (0.9–1.5V/cell) inputs. |
| Output Voltage Range | 2.5 V to 5.0 V - Programmable via FB divider; 0.6V reference enables accurate 5.0V ±2.5% output at full load. |
| Current Limit Range | 1.0 A to 3.0 A - Set by external RSET resistor; guarantees peak inductor current control under transient loads. |
| Quiescent Current | 150 µA in PSM - Maximizes runtime in standby mode for handheld GPS or cordless phone applications. |
| Shutdown Current | 0.1 µA typical - Enables ultra-low-power system-level power gating without leakage concerns. |
| Efficiency | Up to 95% at 500mA - Achieved via synchronous rectification and low RDS(ON) MOSFETs, reducing thermal stress in MSOP-8 package. |
Pinout & Package
Package: MSOP-8 (3.0mm × 4.9mm, 0.65mm pitch), RoHS-compliant, exposed thermal pad connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LX) | Switch Node | Connects to inductor and internal N-MOSFET drain; carries high di/dt switching current and requires tight layout. |
| 2 (EN) | Enable Input | Active-high logic control; 0.8V threshold at VIN=0.9V ensures reliable start-up from weak batteries. |
| 3 (VIN) | Power Input | Accepts 0.9–4.75V; requires ≥10µF low-ESR ceramic capacitor placed adjacent to pin. |
| 4 (PG) | Power Good Output | Open-drain signal asserted high when VOUT is within ±5% of target; used for system power sequencing. |
| 5 (AGND) | Analog Ground | Reference for FB, EN, and PG circuits; must be separated from PGND and joined at single point near IC. |
| 6 (FB) | Voltage Feedback | 0.6V reference node; sets output via R1/R2 divider; sensitive to noise-requires short, shielded trace. |
| 7 (RSET) | Current Limit Set | Resistor-to-ground sets ILIMIT from 1.0A (66kΩ) to 3.0A (floating); determines peak inductor current. |
| 8 (PGND) | Power Ground | High-current return path for LX, VIN, and OUT; connects to exposed thermal pad for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| True Output Disconnect | Prevents reverse current flow during shutdown, eliminating battery drain in off-state portable devices. |
| Inrush Current Limiting | Hardware-controlled pre-charge (500mA, 400µs) prevents input voltage sag and capacitor stress at power-on. |
| Pulse Skip Mode (PSM) | Reduces switching frequency under light load to maintain >80% efficiency at 10mA, extending battery life. |
| Hiccup-Mode Short Protection | Auto-retry shutdown limits average power during sustained VOUT short, preventing thermal runaway. |
| Internal Compensation | Eliminates need for external compensation network, simplifying design and reducing BOM count by one capacitor. |
Applications
| Handheld Computers | Cordless Phones |
|---|---|
Use Scenario: Powering USB-peripheral interfaces and display backlight drivers from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Step-up regulator generating stable 5.0V rail with fast load transient response and low-noise PSM operation. Use Value: Delivers 1A continuous output at 92% efficiency while maintaining <1µA shutdown current for long standby duration. | Use Scenario: Supplying RF front-end and baseband processor core voltage in DECT handsets. IC Role / Device Role / Timing Role: High-efficiency boost converter with true output disconnect to isolate battery during deep sleep modes. Use Value: Enables 1.0V minimum start-up and 150µA quiescent current, extending talk time by >15% versus non-PSM alternatives. |
| GPS Receivers | Battery Backup Supplies |
Use Scenario: Providing clean 3.3V or 5.0V supply to GNSS chipsets and flash memory in asset trackers. IC Role / Device Role / Timing Role: Adjustable-output DC-DC converter with PG indicator for system power validation and sequencing. Use Value: FB accuracy (±2%) and PG threshold (92% VOUT) ensure reliable brown-out detection and safe MCU boot. | Use Scenario: Maintaining SRAM or real-time clock voltage during main power failure in industrial controllers. IC Role / Device Role / Timing Role: Low-quiescent-current boost regulator with inrush limiting to prevent backup capacitor over-stress. Use Value: Pre-charge current limiting (500mA) and soft-start avoid voltage droop on supercapacitor-based backup rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61099YFFR | Lower IQ (200nA shutdown, 400nA PSM), but fixed 3.3V/5.0V outputs; no RSET current limit adjustment. | Lacks adjustable current limit and true output disconnect; better suited for ultra-low-power always-on sensors. | Select when nanowatt shutdown dominates over programmability and load isolation requirements. |
| MAX17222ETA+ | Higher max output current (1.2A), integrated 1.5µH inductor; 0.65V FB reference vs. 0.6V; no PG pin. | No power-good signaling or external current limit tuning; optimized for space-constrained wearables. | Choose for simplified layout where inductor integration offsets loss of PG monitoring and fine current control. |
Compared with TPS61099YFFR and MAX17222ETA+, the PAM2401SCADJ uniquely combines true output disconnect, RSET-programmable current limit, and PG indication-critical for sequenced power systems requiring load isolation, overcurrent adaptability, and rail validation.
Availability
PAM2401SCADJ is available at Aetrix Electronics and suitable for handheld computers, cordless phones, GPS receivers, and battery backup supplies requiring stable component supply, consistent MSOP-8 packaging, and long-term production support.
Supply support for PAM2401SCADJ 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 automotive markets.
The PAM2401 belongs to Diodes' high-frequency boost converter product line, designed specifically for portable electronics needing compact, efficient, and feature-rich voltage step-up in space- and battery-limited environments.
FAQ
What is the minimum input voltage required to start up the PAM2401SCADJ?
The PAM2401SCADJ guarantees startup at 1.0V with 100mA load and 3.3V output, per datasheet Figure 10. This enables operation directly from partially discharged single-cell alkaline or NiMH batteries, making it suitable for legacy portable designs where higher-voltage boosters fail to initialize.
How does the RSET pin configure current limiting?
RSET sets peak inductor current via an external resistor to ground: 66kΩ yields 1.0A, 100kΩ yields 1.5A, and floating yields 3.0A. This direct resistor-based scaling allows precise overcurrent protection tuning without firmware or external sense resistors, simplifying protection design in cost-sensitive applications.
Does the PAM2401SCADJ provide reverse current blocking during shutdown?
Yes-the device features true output disconnect: the internal P-channel MOSFET gate is actively driven to block reverse current flow from VOUT to VIN when EN is low. This eliminates battery drain in off-state systems, a critical requirement for medical and security devices with long idle periods.
Can the PAM2401SCADJ drive a 5V/1A load from a 3.3V input?
Yes-datasheet Figure 4 confirms >90% efficiency delivering 1A at 5V from 3.3V input in MSOP-8 package. Thermal performance remains within limits (TJ < 125°C) with standard PCB copper area, provided PGND thermal pad is properly soldered and connected to ≥1cm² internal ground plane.
PAM2401SCADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.9V
- Voltage - Input (Max):
- 4.75V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
PAM2401SCADJ FAQ
1.How can I place an order for PAM2401SCADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2401SCADJ 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 PAM2401SCADJ reliable?
The price and inventory of PAM2401SCADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2401SCADJ is usually 5 days.
3.What payment methods are accepted for PAM2401SCADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2401SCADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2401SCADJ?
PAM2401SCADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2401SCADJ 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 PAM2401SCADJ?
For technical support, including PAM2401SCADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2401SCADJ requirements.
6.How does Aetrix verify that PAM2401SCADJ is sourced from the original manufacturer or authorized distributors?
All PAM2401SCADJ 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 PAM2401SCADJ meets industry standards.
7.What is the process for return or replacement of PAM2401SCADJ?
All PAM2401SCADJ units undergo pre-shipment inspection (PSI). If there is an issue with PAM2401SCADJ, 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 PAM2401SCADJ part is unused and in its original packaging.
Return procedure for PAM2401SCADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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