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Monolithic Power Systems Inc. MP62351ES-LF-Z
- Part No.:
- MP62351ES-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP62351ES-LF-Z.pdf
- Description:
- IC PWR SWITCH 1:2 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,576
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Product details
Overview
MP62351ES-LF-Z from Monolithic Power Systems is a dual-channel, active-high power distribution switch with 500mA per channel continuous current rating, 85mΩ typical RDS(on), and integrated output discharge (100Ω path). It operates from 2.7V to 5.5V input and provides overcurrent limiting, thermal shutdown, UVLO, and open-drain FLAG reporting for fault detection-used in USB power distribution and PC Card hot-swap circuits.
For engineers reviewing the MP62351ES-LF-Z datasheet, MP62351ES-LF-Z pinout, MP62351ES-LF-Z application, or MP62351ES-LF-Z equivalent, key selection criteria include guaranteed 500mA current limit per channel, dual independent enable control (EN1/EN2), SOIC8 package thermal performance (θJA = 90°C/W), and absence of reverse current flow during disable.
Technical Context
The MP62351ES-LF-Z implements two independent N-channel MOSFET power switches with matched current-limit thresholds (550–1100mA) and trip-current-based constant-current regulation under overload. Each channel features dedicated open-drain FLAG outputs with 8ms deglitching to suppress transient false faults.
It integrates thermal shutdown at 140°C with 20°C hysteresis, under-voltage lockout (1.95–2.65V rising edge), and reverse current blocking. The 100Ω internal discharge path actively bleeds output capacitance when disabled-critical for safe hot-swap sequencing and voltage rail collapse control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Current | 500mA per channel-supports stable load switching without derating up to 85°C ambient. |
| RDS(on) | 85mΩ typical-minimizes conduction loss and self-heating during sustained 500mA operation. |
| Input Voltage Range | 2.7V to 5.5V-compatible with 3.3V and 5V system rails, including USB VBUS and notebook auxiliary supplies. |
| Quiescent Current | 140µA (both channels enabled)-enables low-power standby in portable devices without battery drain penalty. |
| FLAG Deglitch Time | 4–15ms-ensures reliable overcurrent detection while rejecting sub-millisecond transients. |
| Discharge Resistance | 100Ω-provides controlled VOUT ramp-down (e.g., ~1ms for 100µF) to prevent backfeed or latch-up. |
| Thermal Shutdown | 140°C junction temperature-protects die integrity during sustained short-circuit events. |
Pinout & Package
MP62351ES-LF-Z is housed in an 8-pin SOIC package (body size 4.9mm × 3.9mm, 1.27mm pitch) with standard JEDEC MS-012AC footprint and 1.4W max power dissipation at +25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN1 | Channel 1 Enable Input | Active-high logic control; TTL/CMOS compatible; enables OUT1 independently. |
| 2 FLAG1 | Channel 1 Fault Flag Output | Open-drain, active-low signal indicating overcurrent or thermal shutdown on OUT1. |
| 3 FLAG2 | Channel 2 Fault Flag Output | Open-drain, active-low signal indicating overcurrent or thermal shutdown on OUT2. |
| 4 EN2 | Channel 2 Enable Input | Active-high logic control; TTL/CMOS compatible; enables OUT2 independently. |
| 5 OUT2 | Channel 2 Power Output | Switched 2.7–5.5V output with 85mΩ RDS(on) and reverse current blocking. |
| 6 GND | Power Ground Reference | Common return path for IN, OUT1, OUT2, and internal protection circuitry. |
| 7 IN | Main Power Input | Accepts 2.7–5.5V supply; feeds both channels; requires ≥10µF bulk capacitance. |
| 8 OUT1 | Channel 1 Power Output | Switched 2.7–5.5V output with 85mΩ RDS(on) and reverse current blocking. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow asynchronous control of each 500mA channel-essential for staggered power-up in multi-rail systems. |
| Accurate current limiting | 550–1100mA threshold with trip-current response ensures predictable fault behavior across temperature and process variation. |
| Integrated output discharge | 100Ω internal resistor discharges external output capacitors upon disable-eliminates need for external bleed resistors. |
| Thermal shutdown with hysteresis | 140°C shutdown + 20°C hysteresis prevents oscillation during recovery and enables automatic restart after cooling. |
| No FLAG glitch during power-up | FLAG outputs remain inactive until internal biasing stabilizes-avoids spurious fault assertions at system boot. |
Applications
| USB Power Distribution | PC Card Hot Swap |
|---|---|
|
Use Scenario: Providing isolated, current-limited 5V power to USB peripherals in embedded hosts or docking stations. IC Role / Device Role / Timing Role: Dual-channel power switch managing VBUS delivery with per-port fault isolation and fast turn-off (<10ms). Use Value: Prevents host bus failure during peripheral short-circuit by limiting current to 500mA/channel and asserting FLAG within 8ms. |
Use Scenario: Enabling safe insertion/removal of PC Cards (PCMCIA) in industrial laptops or telecom modules. IC Role / Device Role / Timing Role: Controlled power sequencer that ramps output voltage (0.9–1.7ms rise time) and discharges residual charge (100Ω path) before card removal. Use Value: Eliminates arcing and contact damage by ensuring VOUT collapses fully before mechanical disconnect. |
| Notebook PC Auxiliary Rails | Telecom Line Card Power Management |
|
Use Scenario: Switching auxiliary 3.3V/5V rails for WWAN, WLAN, or SSD modules in thin-and-light notebooks. IC Role / Device Role / Timing Role: Low-quiescent (140µA), dual-output load switch supporting dynamic power gating and thermal-aware throttling. Use Value: Reduces standby power consumption while maintaining fast channel enable/disable timing (Ton=3ms, Toff=10ms) for responsive subsystem control. |
Use Scenario: Distributing 5V power to multiple line interface circuits in carrier-grade access equipment. IC Role / Device Role / Timing Role: Fault-tolerant power distributor with dual FLAG outputs feeding FPGA monitoring logic for real-time channel health assessment. Use Value: Enables per-channel fault logging and graceful service degradation-e.g., disabling one port while maintaining backup link integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel current-limited power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP5095DJ-LF-Z | Single-channel, 2.5A rated, 22mΩ RDS(on), no output discharge, QFN-12 package | Higher current density but lacks dual independent control and discharge function | Select when higher per-channel current and smaller footprint are prioritized over dual-channel independence and safe discharge. |
| TPS22965DRLR | Single-channel, 2A rated, 32mΩ RDS(on), 1.2ms typical turn-on, no thermal shutdown hysteresis | Lower RDS(on) and faster switching, but no integrated thermal hysteresis or dual-channel integration | Select when single high-current rail with minimal voltage drop is required, and external thermal management is acceptable. |
Compared with MP5095DJ-LF-Z and TPS22965DRLR, MP62351ES-LF-Z uniquely delivers dual independent 500mA channels with coordinated output discharge and thermal hysteresis-making it irreplaceable for space-constrained, multi-rail hot-swap applications requiring deterministic fault recovery.
Availability
MP62351ES-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, PC Card hot-swap, and notebook PC auxiliary rail applications requiring stable component supply and long-term lifecycle support.
Supply support for MP62351ES-LF-Z 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan.
The MP6235x series belongs to MPS's power distribution switch product line, engineered specifically for portable and embedded systems requiring robust overcurrent protection, precise current limiting, and safe hot-plug capability.
FAQ
Is MP62351ES-LF-Z pin-compatible with MP62350ES-LF-Z?
No. MP62351ES-LF-Z has active-high enable logic (EN1/EN2), while MP62350ES-LF-Z uses active-low enables. Pin assignments are identical, but logic polarity differs-requiring PCB-level enable signal inversion or firmware adjustment to substitute.
What is the maximum allowable output capacitance for stable operation?
The device supports up to 100µF per output with RL=11Ω load, as validated in the datasheet's turn-on/turn-off timing tests. Larger capacitances may extend rise/fall times beyond specified 0.9–1.7ms (VOUT rise) and 0.5ms (VOUT fall), potentially affecting hot-swap sequencing margins.
Does MP62351ES-LF-Z support reverse current blocking during disable?
Yes. The internal MOSFET structure blocks reverse current flow from OUT1 or OUT2 back to IN when the respective channel is disabled-verified by ≤0.2µA reverse leakage at OUTX=5.5V and IN=GND per electrical characteristics table.
Can FLAG1 and FLAG2 be wire-OR'd together externally?
Yes. Both FLAG pins are open-drain and share the same logic polarity (active-low). They can be tied to a common pull-up and monitored as a combined fault signal, provided the total sink current remains within 5mA per pin's rated capability.
Why does the datasheet state "NOT RECOMMENDED FOR NEW DESIGNS"?
MPS recommends MP5095 for new designs due to its higher current rating (2.5A), lower RDS(on) (22mΩ), and QFN package with better thermal performance. MP62351ES-LF-Z remains fully supported for legacy designs and applications requiring dual-channel independence and output discharge.
What is the minimum input voltage required to maintain regulation?
The under-voltage lockout (UVLO) releases at 1.95V (rising edge), but full functionality-including accurate current limiting and FLAG assertion-requires VIN ≥2.7V per the absolute operating range. Below 2.7V, RDS(on) increases and current limit degrades.
How does thermal shutdown interact with current limiting during a sustained short?
Under short-circuit, the device first enters constant-current mode at trip threshold (~1A). If power dissipation raises junction temperature to 140°C, thermal shutdown disables the channel. After cooling to ~120°C (20°C hysteresis), it auto-restarts-cycling until fault clears or external enable is removed.
MP62351ES-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 2
- Ratio - Input:Output:
- 1:2
- Output Configuration:
- High Side
- Output Type:
- -
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- 85mOhm
- Input Type:
- Non-Inverting
- Features:
- Load Discharge, Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP62351ES-LF-Z FAQ
1.How can I place an order for MP62351ES-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP62351ES-LF-Z 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 MP62351ES-LF-Z reliable?
The price and inventory of MP62351ES-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP62351ES-LF-Z is usually 5 days.
3.What payment methods are accepted for MP62351ES-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP62351ES-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP62351ES-LF-Z?
MP62351ES-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP62351ES-LF-Z 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 MP62351ES-LF-Z?
For technical support, including MP62351ES-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP62351ES-LF-Z requirements.
6.How does Aetrix verify that MP62351ES-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP62351ES-LF-Z 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 MP62351ES-LF-Z meets industry standards.
7.What is the process for return or replacement of MP62351ES-LF-Z?
All MP62351ES-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP62351ES-LF-Z, 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 MP62351ES-LF-Z part is unused and in its original packaging.
Return procedure for MP62351ES-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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