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Diodes Incorporated PAM2422AECADJR
- Part No.:
- PAM2422AECADJR
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
PAM2422AECADJR.pdf
- Description:
- IC REG BOOST ADJ 4.5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,565
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Product details
Overview
PAM2422AECADJR from Diodes Incorporated is a 4.5A peak-current, 520kHz fixed-frequency current-mode PWM step-up DC-DC converter with integrated 24V MOSFET, 1.262V feedback reference, and programmable soft-start. It delivers up to 24V output from 2.7–5.5V input and is used in TFT LCD bias supplies requiring stable high-voltage generation.
For engineers reviewing the PAM2422AECADJR datasheet, PAM2422AECADJR pinout, PAM2422AECADJR application, or PAM2422AECADJR equivalent, key selection criteria include its 4.5A switch current limit, SOP-8(EP) thermal performance (θJA = 180°C/W), OVP/UVLO/thermal shutdown protections, and FB voltage regulation accuracy (±2.0% over temperature).
Technical Context
The PAM2422AECADJR employs a current-mode PWM control architecture operating at a fixed 520kHz switching frequency, enabling predictable loop compensation and stable regulation across line and load variations. Its cycle-by-cycle current limiting and 85% maximum duty cycle support high step-up ratios while maintaining stability under transient loads.
It integrates a 24V-rated internal power MOSFET with 100mΩ on-resistance and uses an external Schottky diode for asynchronous rectification. The device transitions to pulse-skipping mode at light loads to maintain efficiency down to microamp quiescent currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Limit | 4.5A peak - sets maximum inductor current and defines safe power delivery capability under overload |
| Feedback Voltage | 1.262V ±2.0% - precise reference for accurate output voltage setting via external resistor divider |
| Switching Frequency | 520kHz - enables compact magnetics and predictable EMI profile with minimal output ripple |
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, 3.3V/5V rails, and wide battery discharge profiles |
| OVP Threshold | 115% of regulated output - internal protection triggers shutdown if FB exceeds 1.45V, preventing overvoltage damage |
| Thermal Shutdown | 160°C with 40°C hysteresis - ensures automatic recovery after cooling, avoiding latch-up failure modes |
| Quiescent Current | 0.35mA typical (active), 0.1µA (shutdown) - minimizes battery drain in always-on or standby systems |
Pinout & Package
Package: SOP-8(EP) with exposed thermal pad connected to ground - provides low θJC (75°C/W) for high-power density layout and efficient heat dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for switch node; must be tied directly to exposed pad and low-impedance ground plane |
| 2 IN | Supply Input | Main input rail connection (2.7–5.5V); requires local 10µF ceramic bypass capacitor near pin |
| 3 EN | Enable Control | Logic-level input (1.4V high threshold); floating not allowed - tie to IN if unused |
| 4 COMP | Error Amplifier Compensation | External RC network connection point for loop stability tuning and transient response optimization |
| 5 AGND | Analog Ground | Reference ground for FB, COMP, SS; separate from PGND to minimize noise coupling into feedback path |
| 6 FB | Feedback Input | Senses output voltage via resistor divider; regulated to 1.262V - determines final output accuracy |
| 7 SS | Soft-Start Control | Capacitor-connected node (e.g., 10nF to GND) controlling startup inrush current ramp rate |
| 8 SW | Switch Output | Drives external inductor and Schottky diode; high dv/dt node requiring minimized trace length and guard ring |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 24V MOSFET | Eliminates external high-voltage switch, reducing BOM count and PCB area in 24V-output boost designs |
| Programmable Soft-Start | Enables controlled inrush current limiting via external capacitor - prevents input rail sag and system reset during power-up |
| Open-Loop Protection | Disables regulator if FB falls below 0.2V - prevents unregulated high-voltage output during feedback disconnection or fault |
| Internal OVP + UVLO | Provides autonomous protection against input undervoltage (2.5V threshold) and output overvoltage (115% trip) |
| Thermal Shutdown w/ Hysteresis | Self-recovering protection at 160°C with 40°C cooldown margin - avoids repeated cycling during sustained overload |
Applications
| TFT LCD Panel Bias Supply | Battery-Powered Portable Instrumentation |
|---|---|
Use Scenario: Generating stable 18–24V bias rails for source/gate drivers in active-matrix LCD displays. IC Role / Device Role / Timing Role: Primary step-up regulator delivering regulated high-voltage output with tight line/load regulation. Use Value: Enables compact, low-noise panel power with <±2% output accuracy and built-in OVP to protect sensitive display ICs. | Use Scenario: Powering analog front-ends and microcontrollers in handheld test equipment powered by single Li-ion cells. IC Role / Device Role / Timing Role: Efficient boost converter supplying 5V/12V from 3.0–4.2V battery range with ultra-low shutdown current. Use Value: Extends battery life via 90%+ efficiency and 0.1µA shutdown draw, while soft-start prevents brownout during wake-up. |
| DSL/Cable Modem Power Management | Set-Top Box Auxiliary Rail Generation |
Use Scenario: Providing isolated 12V auxiliary supply for PHY interface and RF front-end circuitry in broadband access devices. IC Role / Device Role / Timing Role: High-reliability boost controller with thermal and overcurrent protection in thermally dense chassis environments. Use Value: Maintains stable operation up to +85°C ambient with SOP-8(EP) thermal design and cycle-by-cycle current limiting. | Use Scenario: Generating 18V backlight supply and 5V logic rail from main 3.3V/5V board supply in consumer STB platforms. IC Role / Device Role / Timing Role: Dual-rail capable boost converter supporting multiple regulated outputs via discrete feedback networks. Use Value: Reduces external component count with integrated MOSFET and eliminates need for external current-sense resistors. |
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 |
|---|---|---|---|
| MT3608 | 3.2A peak current, no integrated OVP, 1.23V FB reference, requires external MOSFET | Lacks internal overvoltage protection and thermal shutdown; needs additional protection circuitry for safety-critical rails | Select when cost sensitivity outweighs protection requirements and board space allows external FET + protection components |
| XL6009 | 4A peak current, 100kHz switching, no soft-start, wider input range (3.5–32V), external MOSFET | Lower switching frequency increases inductor size; no programmable soft-start increases inrush risk in battery systems | Prefer for higher-input industrial applications where 520kHz EMI constraints are relaxed and thermal management is less critical |
Compared with MT3608 and XL6009, PAM2422AECADJR offers superior integration (internal 24V MOSFET, OVP, thermal shutdown), tighter FB accuracy (1.262V vs. 1.23V/1.25V), and programmable soft-start - making it optimal for space-constrained, battery-fed, and safety-aware designs requiring fast, clean startup and robust fault coverage.
Availability
PAM2422AECADJR is available at Aetrix Electronics and suitable for TFT LCD bias supplies, portable instrumentation power rails, DSL modem auxiliary supplies, and set-top box backlight generation requiring stable component supply and long-term manufacturability.
Supply support for PAM2422AECADJR 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 industrial, computing, and consumer markets.
The PAM242x series belongs to Diodes' high-current boost converter product line, designed specifically for compact, high-reliability DC-DC conversion in display, networking, and portable electronics where integrated protection and thermal robustness are essential.
FAQ
What is the minimum input voltage required for PAM2422AECADJR to start switching?
The device initiates switching when input voltage rises above the under-voltage lockout (UVLO) threshold of 2.5V. Below this level, the IC remains disabled with only 0.1µA shutdown current. Startup is guaranteed once VIN exceeds 2.5V with 200mV hysteresis, preventing oscillation near the threshold.
Can PAM2422AECADJR drive a 24V output from a 3.3V input with full 4.5A load capability?
No - while the device supports up to 24V output, the achievable output current decreases as input-to-output voltage ratio increases due to duty cycle and switch current limits. At 3.3V input and 24V output (7.3:1 ratio), maximum continuous output current is ~1.2A, limited by 85% max duty cycle and thermal constraints in SOP-8(EP).
How is the soft-start timing duration calculated for PAM2422AECADJR?
Soft-start time is determined by the external capacitor (CSS) on the SS pin and the internal 4.5µA charging current: tSS ≈ (CSS × 1.262V) / 4.5µA. For example, a 10nF capacitor yields ~2.8ms ramp time. CSS must be placed close to SS and AGND to avoid noise coupling into the soft-start control path.
Does PAM2422AECADJR require an external Schottky diode, and what are its key rating requirements?
Yes - an external Schottky diode is mandatory. It must withstand the full output voltage (e.g., ≥25V reverse voltage) and handle peak switch current (≥4.5A). Diode forward voltage should be ≤0.5V to minimize conduction loss, and package thermal resistance must support dissipation at full load without exceeding junction temperature limits.
PAM2422AECADJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 4.5A (Switch)
- Frequency - Switching:
- 520kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
PAM2422AECADJR FAQ
1.How can I place an order for PAM2422AECADJR through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2422AECADJR 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 PAM2422AECADJR reliable?
The price and inventory of PAM2422AECADJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2422AECADJR is usually 5 days.
3.What payment methods are accepted for PAM2422AECADJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2422AECADJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2422AECADJR?
PAM2422AECADJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2422AECADJR 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 PAM2422AECADJR?
For technical support, including PAM2422AECADJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2422AECADJR requirements.
6.How does Aetrix verify that PAM2422AECADJR is sourced from the original manufacturer or authorized distributors?
All PAM2422AECADJR 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 PAM2422AECADJR meets industry standards.
7.What is the process for return or replacement of PAM2422AECADJR?
All PAM2422AECADJR units undergo pre-shipment inspection (PSI). If there is an issue with PAM2422AECADJR, 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 PAM2422AECADJR part is unused and in its original packaging.
Return procedure for PAM2422AECADJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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