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Diodes Incorporated AP2145SG-13
- Part No.:
- AP2145SG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2145SG-13.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
AP2145SG-13 from Diodes Incorporated is a single-channel, active-low high-side USB power switch optimized for hot-swap and USB 2.0 applications. It delivers 0.5A continuous load current with 90mΩ RDS(ON), 0.8A accurate current limiting, and integrated short-circuit/thermal protection. Its 7ms deglitched open-drain FLG output enables reliable fault reporting in consumer electronics power rails.
For engineers reviewing the AP2145SG-13 datasheet, AP2145SG-13 pinout, AP2145SG-13 application, or AP2145SG-13 equivalent, key selection criteria include its SO-8 package thermal resistance (110°C/W), UVLO threshold (1.9V typ), reverse current blocking capability, and compatibility with 2.7V–5.5V input systems requiring controlled inrush and fault-safe shutdown.
Technical Context
The AP2145SG-13 integrates a low-RDS(ON) N-channel MOSFET with precision current-sense circuitry and deglitched open-drain FLG reporting. Its internal UVLO prevents turn-on until VIN ≥ 1.9V, and thermal shutdown activates at +135°C with +25°C hysteresis.
It features active-low enable logic, reverse current blocking during disable, and 0.6ms typical output rise time under 10Ω load. The device operates across –40°C to +85°C ambient and supports both SO-8 and MSOP-8EP packages with exposed thermal pads tied to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 0.8A typical - clamps output current to prevent damage during overload or short-circuit conditions |
| RDS(ON) | 90mΩ max at 5V, 25°C - minimizes conduction loss and self-heating in 0.5A USB power rail |
| Input Voltage Range | 2.7V to 5.5V - supports full USB 2.0 bus voltage range and wide-input industrial 3.3V/5V systems |
| FLG Blanking Time | 7ms typical - suppresses false over-current triggers caused by capacitive inrush transients |
| Shutdown Current | 1µA max - enables ultra-low-power standby in battery-backed or always-on USB peripherals |
| UVLO Threshold | 1.9V typical - ensures safe turn-off during brown-out and prevents erratic behavior during hot-plug removal |
| Thermal Shutdown | +135°C trip, +25°C hysteresis - provides autonomous recovery after fault clearance without external reset |
Pinout & Package
AP2145SG-13 is supplied in an SO-8 package with exposed pad (Green, RoHS-compliant). The exposed pad must be soldered to PCB ground plane for thermal management but is not an electrical ground path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-low logic control; pulls low to activate switch; high-Z when disabled |
| FLG (Pin 2) | Fault flag output | Open-drain, active-low signal asserted after 7ms deglitch on over-current or over-temperature |
| GND (Pin 3) | Power ground | Reference for internal circuitry and current-sense amplifier; connects to system ground |
| NC (Pins 4,5) | No connection | Internally unconnected; must remain floating or tied to GND per layout guidelines |
| OUT (Pins 6,8) | Switched output | Parallel output pins; must be externally tied together to deliver full 0.5A load current |
| IN (Pin 7) | Power input | Connects to 2.7V–5.5V source; feeds internal regulator and power switch |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backflow from output to input when disabled - critical for multi-rail USB hubs and shared VBUS systems |
| Controlled 0.6ms rise time | Soft-start limits inrush current into large capacitive loads (e.g., 120µF downstream) without external RC networks |
| Integrated 7ms deglitch on FLG | Eliminates need for external RC filter on fault pin - reduces BOM count and layout area in space-constrained designs |
| UL Recognized & CB Certified | Meets IEC60950-1 safety requirements - accelerates end-product certification for consumer and computing equipment |
| Halogen- and antimony-free "Green" compound | Contains <900ppm Br, <900ppm Cl, <1000ppm Sb - satisfies strict environmental compliance for global OEM shipments |
Applications
| USB 2.0 Port Power Control | Laptop Docking Station Rail Switching |
|---|---|
|
Use Scenario: Individual USB port power delivery in multi-port hubs where each port requires independent over-current protection and hot-plug detection. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS rail; enables/disables power per port with fault reporting via FLG. Use Value: Prevents bus-wide shutdown during single-port short; 0.8A limit matches USB 2.0 spec while 90mΩ RDS(ON) keeps voltage drop below 45mV at 0.5A. |
Use Scenario: Isolating auxiliary power rails (e.g., HDMI, Ethernet, USB-C PD negotiation) in laptop docking stations during insertion/removal. IC Role / Device Role / Timing Role: Hot-swap controller managing inrush into downstream regulators and interface ICs; UVLO ensures clean power sequencing. Use Value: 0.6ms rise time soft-start avoids triggering host-side over-current detectors; FLG signal alerts MCU of faults before thermal shutdown occurs. |
| Smartphone Peripheral Charging Circuit | Set-Top Box USB Host Protection |
|
Use Scenario: Enabling charging of USB peripherals (e.g., Bluetooth headsets, game controllers) from smartphone OTG ports with strict thermal constraints. IC Role / Device Role / Timing Role: Load switch protecting phone battery from shorted accessories; reverse current blocking prevents discharge through VBUS when phone is off. Use Value: 1µA shutdown current preserves battery life; -40°C to +85°C rating supports operation in automotive-adjacent environments like parked-car use. |
Use Scenario: Safeguarding USB host ports on cable/satellite set-top boxes against ESD and accidental shorts from user-connected devices. IC Role / Device Role / Timing Role: Protected power switch with 6kV HBM ESD rating and fast thermal response; FLG ties to system watchdog or UI alert. Use Value: Integrated short-circuit response (<10µs) and 7ms deglitch prevent nuisance reboots; SO-8 package allows easy placement near USB-A connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side USB power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2145MPG-13 | Same silicon, MSOP-8EP package with 60°C/W θJA; exposed pad requires thermal via design | Better thermal performance in dense layouts; smaller footprint but higher assembly cost | Select when board space is constrained and thermal margin is critical; requires careful pad layout per Diodes AN-2001 |
| TCK107AG,LF | Active-high EN, 0.6A limit, 120mΩ RDS(ON), no FLG output | Lacks fault reporting and deglitch; simpler control but no diagnostics for USB host firmware | Choose only for cost-sensitive, non-fault-aware applications where FLG is unused and EN polarity aligns |
Compared with AP2145MPG-13, the AP2145SG-13 offers easier thermal management via SO-8's larger copper area, while TCK107AG lacks FLG functionality and has higher conduction loss-making AP2145SG-13 optimal for USB 2.0 systems requiring diagnostic visibility and robust hot-swap behavior.
Availability
AP2145SG-13 is available at Aetrix Electronics and suitable for USB 2.0 port protection, laptop docking station power sequencing, and set-top box peripheral interface applications requiring stable component supply and long-term production continuity.
Supply support for AP2145SG-13 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 power management, signal integrity, and protection solutions for high-volume electronics markets.
The AP2145 belongs to Diodes' USB power switch product line, designed specifically for robust, low-BOM-count hot-swap implementation in consumer, computing, and communications equipment with stringent USB 2.0 compliance requirements.
FAQ
What is the maximum continuous load current supported by AP2145SG-13?
The AP2145SG-13 is rated for 0.5A maximum continuous load current per the manufacturer's recommended operating conditions. Although its current limit is 0.8A typical, sustained operation above 0.5A risks exceeding thermal limits in SO-8 packaging-especially above 60°C ambient-due to its 110°C/W junction-to-ambient thermal resistance.
Does AP2145SG-13 require external components for basic operation?
No external components are required for core switching functionality. A 0.1µF ceramic capacitor between IN and GND is recommended for stability, and a 120µF electrolytic capacitor on OUT is advised for low-temperature short-circuit immunity (<–30°C), but neither is mandatory for room-temperature USB 2.0 operation per the datasheet.
How does the FLG pin behave during transient overloads?
The FLG pin remains inactive during brief inrush events due to its 7ms deglitch timeout. It asserts low only after sustained over-current (>7ms) or over-temperature conditions, preventing false alarms from capacitive loads or momentary shorts-enabling direct MCU GPIO monitoring without debouncing circuitry.
Can AP2145SG-13 be used in 3.3V-only systems?
Yes. Its 2.7V–5.5V input range fully supports 3.3V systems. At 3.3V input, RDS(ON) rises to 120mΩ max (vs. 90mΩ at 5V), increasing conduction loss by ~33%, but remains within safe thermal limits for 0.5A loads with proper PCB copper area and ambient ≤70°C.
AP2145SG-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- 95mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP2145SG-13 FAQ
1.How can I place an order for AP2145SG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2145SG-13 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 AP2145SG-13 reliable?
The price and inventory of AP2145SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2145SG-13 is usually 5 days.
3.What payment methods are accepted for AP2145SG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2145SG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2145SG-13?
AP2145SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2145SG-13 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 AP2145SG-13?
For technical support, including AP2145SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2145SG-13 requirements.
6.How does Aetrix verify that AP2145SG-13 is sourced from the original manufacturer or authorized distributors?
All AP2145SG-13 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 AP2145SG-13 meets industry standards.
7.What is the process for return or replacement of AP2145SG-13?
All AP2145SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2145SG-13, 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 AP2145SG-13 part is unused and in its original packaging.
Return procedure for AP2145SG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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