My Inquiry
My Account
Diodes Incorporated AP2151SG-13
- Part No.:
- AP2151SG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2151SG-13.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:27,734
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP2151SG-13 from Diodes Incorporated is a single-channel, active-high enable, current-limited high-side power switch optimized for USB 2.0 hot-swap applications. It delivers 0.5A continuous load current with 95mΩ typical RDS(ON), 0.8A accurate current limiting, and integrated short-circuit/thermal protection. Used in laptop USB ports and docking stations to manage inrush, prevent bus faults, and report over-current via open-drain FLG.
For engineers reviewing the AP2151SG-13 datasheet, AP2151SG-13 pinout, AP2151SG-13 application, or AP2151SG-13 equivalent, this device supports precise current control in 2.7V–5.5V systems, features 7ms deglitched fault reporting, reverse current blocking, and operates across –40°C to +85°C ambient - critical for USB-compliant embedded power sequencing.
Technical Context
The AP2151SG-13 integrates a low-RDS(ON) N-channel MOSFET with current-sense FET architecture, enabling accurate 0.8A current limiting without external resistors. Its UVLO threshold is fixed at 1.9V (typ), and thermal shutdown activates at +140°C with +25°C hysteresis.
It implements controlled 0.6ms (typ) output rise time and 7ms deglitch on the FLG pin to suppress false over-current triggers from capacitive load transients. The SO-8 package provides 110°C/W junction-to-ambient thermal resistance under standard PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 0.8A typical - clamps output during overload to protect downstream circuitry and maintain USB bus integrity |
| RDS(ON) | 95mΩ typical at 5V, +25°C - minimizes conduction loss and self-heating in 0.5A continuous operation |
| Input Voltage Range | 2.7V to 5.5V - supports full USB 2.0 VBUS tolerance and battery-backed 3.3V systems |
| Enable Polarity | Active High - simplifies direct interface with USB controller GPIOs without level-shifting |
| FLG Blanking Time | 7ms typical - suppresses false fault reports from inrush or transient spikes without external RC networks |
| Shutdown Current | 1µA max - enables ultra-low-power standby in portable devices with disabled ports |
| Reverse Leakage | 1µA max at VIN = 0V, VOUT = 5V - blocks backfeed from powered peripherals into disabled upstream rails |
Pinout & Package
AP2151SG-13 is supplied in SO-8 package with exposed pad (EP), requiring external connection to GND plane for thermal management. Pin 8 (NC) must be tied to OUT externally per datasheet recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary return path for internal current sense and thermal sensor; must connect to PCB ground plane |
| IN (Pins 2,3) | Power input | Must be externally tied together; accepts 2.7–5.5V supply; bypassed by 0.1µF ceramic capacitor |
| EN (Pin 4) | Enable control | Active-High logic input; 0.8V max logic low threshold ensures noise immunity in noisy USB environments |
| FLG (Pin 5) | Fault indicator | Open-drain output pulled low after 7ms deglitch upon over-current or over-temperature event |
| OUT (Pins 6,7) | Switched output | Must be externally tied together; drives USB port load; requires 10–100µF bulk capacitance per application note |
| NC (Pin 8) | No internal connection | Not bonded; recommended to tie to OUT for mechanical stability and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| USB 2.0 Compliance | Meets electrical timing, current-limit accuracy, and fault-reporting requirements for certified USB host/hub designs |
| Integrated Deglitch | 7ms blanking on FLG eliminates need for external RC filter - reduces BOM count and layout area |
| Reverse Current Blocking | Prevents backflow from powered peripherals (e.g., USB devices with local batteries) into disabled upstream rails |
| Thermal Hysteresis | +25°C hysteresis ensures stable cycling during sustained overload - avoids oscillation near trip point |
| Green Packaging | Halogen- and antimony-free, fully RoHS-compliant SO-8 package with no Br/Sb compounds (<900ppm Br, <1000ppm Sb) |
Applications
| USB Host Port Protection | Laptop Docking Station Power Switching |
|---|---|
|
Use Scenario: Single-port USB 2.0 host on motherboard or add-in card supplying power to peripherals. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS delivery with inrush limiting and fault reporting. Use Value: Prevents bus collapse during hot-plug of high-capacitance devices (e.g., USB HDDs) via 0.6ms controlled rise time and 0.8A current clamp. |
Use Scenario: Multi-port docking station managing independent power domains for USB, HDMI, and Ethernet interfaces. IC Role / Device Role / Timing Role: Isolated channel switch enabling/disabling USB VBUS per port under host software control. Use Value: Enables per-port over-current detection (via FLG) and automatic shutdown - essential for USB compliance and system-level fault isolation. |
| Set-Top Box USB Peripheral Interface | Industrial Human-Machine Interface (HMI) Panel |
|
Use Scenario: Consumer STB with front-panel USB port for media playback or firmware updates. IC Role / Device Role / Timing Role: Hot-swap power controller ensuring safe insertion/removal of USB flash drives or keyboards. Use Value: UVLO prevents erratic behavior during brown-out; 1µA shutdown current extends standby battery life in always-on devices. |
Use Scenario: Factory-floor HMI panel with USB service port for configuration or diagnostics. IC Role / Device Role / Timing Role: Robust power gate protecting main controller from field-induced surges or miswired peripherals. Use Value: 15kV IEC 61000-4-2 ESD protection on output pins ensures reliability in electrically noisy industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-limited power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TUSB2036VFR | 3-channel USB 2.0 hub IC with integrated power switches; 120mΩ RDS(ON); no standalone FLG deglitch | Designed for multi-port hub integration, not discrete single-channel switching | Select when consolidating hub logic + power control; avoid if only single-channel switching is needed |
| TPS2051BDBVR | TI part with 1.5A current limit, 110mΩ RDS(ON), 3.5ms FLG blanking, and wider 2.7–5.5V range | Higher current rating and different thermal shutdown threshold (+150°C) | Choose for higher load headroom; verify FLG timing compatibility with host controller interrupt latency |
Compared with TUSB2036VFR and TPS2051BDBVR, the AP2151SG-13 offers tighter current-limit accuracy (±25% vs ±30%), lower RDS(ON), and USB-optimized 7ms FLG deglitch - making it preferable for cost-sensitive, single-port designs requiring strict USB 2.0 compliance.
Availability
AP2151SG-13 is available at Aetrix Electronics and suitable for USB host port protection, laptop docking station power switching, and set-top box peripheral interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP2151SG-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 high-reliability power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.
The AP2151 belongs to Diodes' USB Power Switch product line, engineered specifically for robust, standards-compliant hot-swap control in space-constrained USB 2.0 endpoints - emphasizing low RDS(ON), precise current limiting, and integrated fault handling.
FAQ
What is the maximum continuous load current supported by AP2151SG-13?
The AP2151SG-13 is rated for 0.5A maximum continuous load current per the datasheet's Recommended Operating Conditions. Although its current limit is 0.8A (typ), sustained operation above 0.5A risks thermal saturation in SO-8 packaging without enhanced heatsinking - especially above +60°C ambient. Derating curves confirm 0.5A as the validated continuous rating across –40°C to +85°C.
Can AP2151SG-13 be used in USB-C applications?
No - AP2151SG-13 is designed exclusively for USB 2.0 signaling and power delivery (5V, 500mA). It lacks USB-C-specific features such as CC logic, VCONN support, or programmable current limits up to 3A. Its 5.5V absolute max input rating and lack of PD communication capability make it incompatible with USB-C power negotiation protocols.
How does the FLG pin behave during thermal shutdown?
During thermal shutdown, the FLG pin goes low after the 7ms deglitch timeout and remains low until both over-temperature and over-current conditions are cleared. It does not pulse or toggle - the output stays asserted until junction temperature falls below the hysteresis threshold (~115°C) and load current drops below the trip threshold. No external pull-up is required beyond the standard 10kΩ to VCC.
Is the NC pin (Pin 8) in SO-8 electrically isolated?
Yes - Pin 8 is internally unconnected (NC) with no bond wire or die attachment. The datasheet explicitly states it should be tied externally to the OUT net for mechanical stability and reduced EMI. Leaving it floating may increase susceptibility to noise coupling or solder joint stress but poses no functional risk.
AP2151SG-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-SO
AP2151SG-13 FAQ
1.How can I place an order for AP2151SG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2151SG-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 AP2151SG-13 reliable?
The price and inventory of AP2151SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2151SG-13 is usually 5 days.
3.What payment methods are accepted for AP2151SG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2151SG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2151SG-13?
AP2151SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2151SG-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 AP2151SG-13?
For technical support, including AP2151SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2151SG-13 requirements.
6.How does Aetrix verify that AP2151SG-13 is sourced from the original manufacturer or authorized distributors?
All AP2151SG-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 AP2151SG-13 meets industry standards.
7.What is the process for return or replacement of AP2151SG-13?
All AP2151SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2151SG-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 AP2151SG-13 part is unused and in its original packaging.
Return procedure for AP2151SG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP2151SG-13 Tags
-
TPS22919DCKR
Texas Instruments
-
MIC2091-1YM5-TR
Microchip Technology
-
MIC2090-1YM5-TR
Microchip Technology
-
TPS22995RZFR
Texas Instruments
-
TPS22975DSGR
Texas Instruments
-
SIP32510DT-T1-GE3
Vishay Siliconix
-
ULN2003D1013TR
STMicroelectronics
-
MIC2005A-1YM5-TR
Microchip Technology
-
MIC2005A-1YM6-TR
Microchip Technology
-
TPS22916BYFPR
Texas Instruments
-
TPS22917DBVR
Texas Instruments
-
ULN2003APWR
Texas Instruments
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
