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Diodes Incorporated AP1212LSL-U
- Part No.:
- AP1212LSL-U
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1212LSL-U.pdf
- Description:
- IC PWR SWITCH N-CHANNEL 1:2 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,396
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Product details
Overview
AP1212LSL-U from Diodes Incorporated is a dual-channel high-side USB power switch IC with independent enable and fault flag control, designed for bus-powered and self-powered USB hubs and peripheral ports. It delivers 500mA continuous current per channel, features 110mΩ typical RDS(ON), 1.25A short-circuit current limit, and 1ms soft-start turn-on to suppress inrush-induced voltage droop.
For engineers reviewing the AP1212LSL-U datasheet, AP1212LSL-U pinout, AP1212LSL-U application, or AP1212LSL-U equivalent, key selection criteria include USB-compliant current limiting, independent open-drain fault flag signaling (over-current/UVLO/thermal), SOP-8L thermal performance (θJA = 165°C/W), and logic-compatible active-low enable inputs.
Technical Context
The AP1212LSL-U integrates two N-channel MOSFET high-side switches with internal charge pumps, current-sense circuitry, and thermal shutdown logic. Each channel operates independently with dedicated EN and FLG pins, supporting simultaneous or staggered port enablement in USB 2.0 downstream applications.
Its UVLO threshold is 2.4V (typical), current-limit threshold is 1.2A (typ), and fault flag asserts low on over-current, thermal shutdown (>140°C), or input undervoltage - all driving an open-drain output compatible with 3.3V/5V controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports both 3.3V and 5V USB supply rails without external level shifting. |
| Continuous Current per Channel | 500mA minimum - meets USB 2.0 downstream port specification for bus-powered devices. |
| RDS(ON) | 110mΩ typical at VIN = 5V - ensures ≤265mV voltage drop at 500mA, satisfying USB voltage-drop compliance. |
| Short-Circuit Current Limit | 1.25A maximum - provides robust protection while staying below UL 25VA safety threshold. |
| Enable Logic Polarity | Active-low (L suffix) - EN1/EN2 assert switch ON when pulled low; requires pull-up for default OFF state. |
| Fault Flag Output | Open-drain, active-low - sinks up to 10mA; signals over-current, UVLO, or thermal shutdown to host controller. |
| Thermal Shutdown Threshold | 140°C with 10°C hysteresis - disables both channels and asserts FLG until junction cools to ≤130°C. |
Pinout & Package
SOP-8L package (4.9mm × 6.0mm × 1.75mm height), RoHS-compliant, lead-free finish, green molding compound. Thermal resistance: θJA = 165°C/W, θJC = 26°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN1) | Channel 1 Enable Input | Active-low logic input; must be pulled low to enable OUT1; floating not allowed. |
| 2 (EN2) | Channel 2 Enable Input | Active-low logic input; independent control of OUT2; no cross-talk with EN1. |
| 3 (FLG1) | Channel 1 Fault Flag | Open-drain output; pulled low during over-current, UVLO, or thermal fault on OUT1. |
| 4 (FLG2) | Channel 2 Fault Flag | Open-drain output; independent assertion for faults on OUT2 only. |
| 5 (GND) | Power Ground | Common return for internal circuitry and MOSFET sources; must be low-impedance connection. |
| 6 (OUT2) | Channel 2 Switch Output | N-MOSFET source terminal; connects to downstream USB VBUS load; supports backdrive (VOUT > VIN) in off-state. |
| 7 (OUT1) | Channel 1 Switch Output | N-MOSFET source terminal; electrically isolated from OUT2; same backdrive capability. |
| 8 (IN) | Supply Input | Drain connection for both MOSFETs; supplies internal bias and charge pump; requires 0.1µF local bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-side switching | Enables per-port power control in USB hubs without shared enable/fault coupling. |
| 1ms soft-start turn-on | Prevents upstream voltage droop during hot-plug events by limiting inrush di/dt. |
| Independent open-drain fault flags | Allows host MCU to isolate fault origin (port 1 vs. port 2) without additional GPIOs or logic. |
| Backdrive-capable outputs | Permits OUTx to float above IN during off-state - essential for USB OTG or bidirectional power arbitration. |
| 3.3V/5V logic-compatible enables | Accepts standard CMOS levels; eliminates need for external level translators in mixed-voltage systems. |
Applications
| USB 2.0 Hub Power Management | Bus-Powered Peripheral Docking Station |
|---|---|
|
Use Scenario: A 4-port USB 2.0 hub uses AP1212LSL-U to individually enable/disable downstream VBUS lines based on device enumeration status. IC Role / Device Role / Timing Role: Dual high-side switch providing per-port over-current protection and fault reporting via FLG1/FLG2 to hub controller. Use Value: Enables automatic port disable on short-circuit detection while maintaining power to other ports - improving system reliability and user experience. |
Use Scenario: A laptop docking station powers USB peripherals (keyboard, mouse, storage) from bus power, requiring hot-plug-safe VBUS switching. IC Role / Device Role / Timing Role: High-side power gate with soft-start and independent enable control for each peripheral slot. Use Value: Eliminates host-system brownouts during plug-in by limiting inrush current to <140mA per port - verified in typical application test circuits. |
| Self-Powered USB Charging Port | Industrial USB Device Controller |
|
Use Scenario: A wall-mounted USB charger implements dual independent 500mA ports with individual fault monitoring and thermal derating. IC Role / Device Role / Timing Role: USB-compliant power switch with UVLO (2.4V) and thermal shutdown (140°C) for safe operation under varying AC-DC adapter conditions. Use Value: Ensures compliance with USB BC1.2 charging specifications while preventing MOSFET failure due to sustained overload or ambient temperature rise. |
Use Scenario: An industrial PLC module adds USB connectivity for configuration and firmware updates, requiring robust ESD and fault resilience. IC Role / Device Role / Timing Role: High-reliability power switch with 500V HBM ESD rating and open-drain fault signaling to real-time controller. Use Value: Provides deterministic fault response (≤10µs flag assertion) and withstands harsh environments where transient overloads are common. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-side USB power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2146WU-7 | Single-channel, 2.7–5.5V, 1.5A current limit, integrated 1.2ms soft-start, WLCSP-12 package. | Requires two units for dual-port use; smaller footprint but higher board area cost and no shared IN pin. | Select when space-constrained designs prioritize miniaturization over dual-channel integration. |
| AP2156WU-7 | Dual-channel, 2.7–5.5V, 1.5A current limit, 1.2ms soft-start, WLCSP-20 package, enhanced thermal performance (θJA = 120°C/W). | Same functional scope as AP1212LSL-U but with improved thermal margin and tighter current-limit tolerance (±5% vs ±20%). | Select for new designs requiring longer lifecycle support, tighter parametric control, and better thermal headroom in compact enclosures. |
Compared with AP1212LSL-U, AP2146WU-7 increases design complexity for dual-port use but reduces PCB area, while AP2156WU-7 maintains identical functionality with superior thermal behavior and tighter current-limit accuracy - making it the recommended upgrade path per Diodes' documentation.
Availability
AP1212LSL-U is available at Aetrix Electronics and suitable for USB 2.0 hub designs, bus-powered peripheral docking stations, and self-powered USB charging ports requiring stable component supply and legacy design continuity.
Supply support for AP1212LSL-U 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 consumer, industrial, and computing markets.
The AP1212 series belongs to Diodes' USB power switch product line, engineered specifically to meet USB 2.0 electrical compliance requirements including voltage drop, inrush control, and fault reporting - targeting hub, dock, and charging applications.
FAQ
What does the "L" and "S" suffix in AP1212LSL-U indicate?
The first "L" denotes active-low enable logic (EN1/EN2 asserted low), the "S" specifies SOP-8L package, and the second "L" confirms lead-free/RoHS-compliant finish. The "-U" suffix indicates tape-and-reel packaging (2500 units per reel), per Diodes' ordering guide DS31019 Rev. 8.
Can AP1212LSL-U drive loads exceeding 500mA continuously?
No - its rated continuous current is 500mA per channel under specified thermal conditions (TA ≤ 85°C, θJA = 165°C/W). At 1A, junction temperature exceeds safe limits even with minimal ambient rise; the 1.25A short-circuit limit is time-limited and triggers immediate FLG assertion and thermal shutdown if sustained.
Is external capacitor required on the IN pin?
Yes - a 0.1µF ceramic capacitor placed within 2mm of the IN and GND pins is mandatory per datasheet Section 10. Without it, supply ringing during short-circuit transients can damage internal control circuitry due to lead inductance coupling.
How does the AP1212LSL-U handle backdrive conditions?
When disabled, OUT1/OUT2 can safely float up to +7V (absolute max), exceeding the IN voltage - enabling use in USB On-The-Go (OTG) or bidirectional power arbitration where downstream devices may backfeed VBUS. This is enabled by internal body-diode blocking and gate-drive architecture.
AP1212LSL-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Type:
- USB Switch
- Number of Outputs:
- 2
- Ratio - Input:Output:
- 1:2
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- 110mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP1212LSL-U FAQ
1.How can I place an order for AP1212LSL-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1212LSL-U 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 AP1212LSL-U reliable?
The price and inventory of AP1212LSL-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1212LSL-U is usually 5 days.
3.What payment methods are accepted for AP1212LSL-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1212LSL-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1212LSL-U?
AP1212LSL-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1212LSL-U 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 AP1212LSL-U?
For technical support, including AP1212LSL-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1212LSL-U requirements.
6.How does Aetrix verify that AP1212LSL-U is sourced from the original manufacturer or authorized distributors?
All AP1212LSL-U 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 AP1212LSL-U meets industry standards.
7.What is the process for return or replacement of AP1212LSL-U?
All AP1212LSL-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1212LSL-U, 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 AP1212LSL-U part is unused and in its original packaging.
Return procedure for AP1212LSL-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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