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Monolithic Power Systems Inc. MP2136EG-LF-P
- Part No.:
- MP2136EG-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
MP2136EG-LF-P.pdf
- Description:
- IC REG BUCK ADJ 1A 6QFN
- Quantity:
- Payment:
- Shipping:
Inventory:916
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Product details
Overview
MP2136EG-LF-P from Monolithic Power Systems is a 2MHz synchronous step-down DC-DC converter with integrated high-side PFET and low-side NFET, delivering up to 1A load current from 2.5V–6V input while regulating output down to 0.6V. It features current-mode PWM control, <1µA shutdown current, internal soft-start, and cycle-by-cycle overcurrent protection-designed for single-cell Li-ion/Li-polymer battery-powered portable electronics.
For engineers reviewing the MP2136EG-LF-P datasheet, MP2136EG-LF-P pinout, MP2136EG-LF-P application, or MP2136EG-LF-P equivalent, key selection criteria include its 2MHz fixed-frequency operation, QFN6 2mm×2mm thermal performance (θJA = 50°C/W), 0.6V feedback reference accuracy (±2%), and dropout capability enabling 100% duty cycle at low VIN–VOUT differentials.
Technical Context
The MP2136EG-LF-P implements peak current-mode PWM control with slope compensation to ensure stability at duty cycles >50%, supporting fast transient response and inherent cycle-by-cycle current limiting. Its 2MHz oscillator enables compact external components-typically 1.2µH inductor and 4.7µF/10µF ceramic input/output capacitors.
Functional block integration includes a 200mΩ high-side PFET and 150mΩ low-side NFET, eliminating external diode losses. Thermal shutdown activates at 150°C with 20°C hysteresis, and EN pin logic thresholds (1.6V high / 0.4V low) support direct microcontroller interface without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single Li-ion (2.7–4.2V) or Li-polymer battery with headroom for voltage sag and boost-battery backup. |
| Output Voltage Range | 0.6V to 6V - set via external resistor divider; 0.6V feedback reference enables core supplies for modern microprocessors and DSPs. |
| Switching Frequency | 2MHz fixed - allows use of sub-2.2µH inductors and <10µF ceramic capacitors, reducing board area and EMI filter complexity. |
| Load Current Capability | 1A continuous - sustained at full load across input range with thermal derating per θJA = 50°C/W on standard 4-layer PCB. |
| Shutdown Current | <1µA - minimizes battery drain in standby mode for always-on portable devices like smartwatches and wireless sensors. |
| Feedback Reference Voltage | 0.594V ±2% (25°C), 0.594V ±3% (–40°C to +85°C) - ensures tight output regulation under temperature variation without external trimming. |
| Thermal Shutdown Threshold | 150°C with 20°C hysteresis - protects die during overload or poor PCB heatsinking; automatic recovery after cooldown. |
Pinout & Package
MP2136EG-LF-P is housed in a thermally enhanced 6-pin QFN package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. The package supports high power density and efficient heat transfer to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No connection | Must remain unconnected; no internal bond wire or circuitry attached. |
| 2 EN | Enable control input | Logic-level enable: ≥1.6V turns regulator on; ≤0.4V forces shutdown with <1µA quiescent draw. |
| 3 IN | Power input supply | Connects to 2.5–6V source; requires local 4.7µF ceramic bypass capacitor to minimize switching noise injection. |
| 4 SW | Switch node | Drain connection of internal PFET/NFET; drives external inductor; high dv/dt node requiring short, low-inductance routing. |
| 5 GND | Ground and thermal pad | Primary return path and thermal interface; exposed pad must be soldered to large PCB copper area for θJA = 50°C/W. |
| 6 FB | Feedback input | Senses output voltage via resistor divider; regulated at 0.6V; high-impedance input (±50nA bias) minimizes divider current error. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PFET/NFET synchronous rectification | Eliminates external Schottky diode, improving efficiency by 5–10% at 1A and reducing solution footprint. |
| Current-mode PWM with slope compensation | Enables stable operation at >50% duty cycle and provides inherent cycle-by-cycle current limiting for robust short-circuit protection. |
| 100% duty-cycle capability | Permits dropout operation down to VIN ≈ VOUT + ILOAD × (RDS(on)_PFET + RDCR_inductor), extending battery runtime in low-VIN conditions. |
| Internal soft-start (150µs) | Controls inrush current during startup, preventing input voltage droop and avoiding false triggering of upstream UVLO or battery protection circuits. |
| Short-circuit foldback protection | Reduces switching frequency and PFET current limit during output short, limiting power dissipation and enabling safe auto-recovery when fault clears. |
Applications
| Cellular Phones | Microprocessor Core Supplies |
|---|---|
Use Scenario: Powering application processors and baseband ICs in slim-profile smartphones operating from single Li-ion cells. IC Role / Device Role / Timing Role: Primary buck converter generating 1.0–1.2V core voltage with fast load-transient response to CPU DVFS events. Use Value: 2MHz switching enables small 1.2µH inductor and 10µF output cap, saving >25mm² PCB area versus 500kHz alternatives. | Use Scenario: Delivering tightly regulated 0.8–1.5V to ARM Cortex-A/M cores in portable embedded systems. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with 0.6V feedback reference and ±2% accuracy over temperature. Use Value: Internal soft-start prevents core voltage overshoot during cold boot, ensuring reliable processor initialization. |
| PDA & Smartphones | Digital Still Cameras |
Use Scenario: Supplying 1.8V I/O and 3.3V peripheral rails in handheld PDAs with limited battery capacity. IC Role / Device Role / Timing Role: Dual-output capable via external divider configuration; supports dynamic voltage scaling for display backlight and memory interfaces. Use Value: <1µA shutdown current extends standby time to weeks between charges in always-connected mobile devices. | Use Scenario: Powering CMOS image sensor analog front-end and digital ISP blocks in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buck regulator supplying clean 2.8V sensor bias and 1.2V digital core. Use Value: Fixed 2MHz frequency avoids audible noise in camera audio circuits and simplifies EMI filtering near sensitive analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2141N | Successor device with improved efficiency (up to 94%), lower quiescent current (0.5µA), and extended input range (2.3V–6.5V). | Pin-compatible drop-in replacement; supports newer designs requiring longer battery life and wider VIN tolerance. | Select MP2141N for new designs-MP2136EG-LF-P is marked "Not Recommended for New Designs" in official documentation. |
| TPS62231DRVR | TI part with 3.6MHz switching, 0.6V reference, but only 0.6A rating and no 100% duty cycle mode. | Requires larger inductor for same ripple; unsuitable for deep dropout scenarios where VIN approaches VOUT. | Choose only if higher frequency (3.6MHz) and TI supply chain alignment outweigh 1A capability and dropout needs. |
Compared with MP2141N, MP2136EG-LF-P delivers proven reliability in legacy portable designs but lacks efficiency gains and extended input range; versus TPS62231DRVR, it offers higher current, true dropout operation, and better thermal performance in QFN6, though at lower switching frequency.
Availability
MP2136EG-LF-P is available at Aetrix Electronics and suitable for cellular phones, microprocessor core supplies, and digital still cameras requiring stable component supply throughout production lifecycles.
Supply support for MP2136EG-LF-P 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 mixed-signal ICs for power management, motion control, and automotive applications.
The MP2136 belongs to MPS's high-frequency synchronous buck converter product line, engineered for space-constrained portable electronics requiring high efficiency, low quiescent current, and robust protection in battery-powered environments.
FAQ
What is the maximum recommended PCB copper area for the exposed thermal pad?
The exposed thermal pad (Pin 5) must be connected to a solid ground plane covering ≥25mm², with ≥4 thermal vias (0.3mm diameter, spaced ≤1mm apart) to inner ground layers. This achieves the specified θJA = 50°C/W on a standard 4-layer JEDEC PCB and prevents thermal shutdown at 1A load.
Can MP2136EG-LF-P operate with an input voltage below 2.5V?
No-absolute minimum input is 2.5V per datasheet specifications. Below this, undervoltage lockout (UVLO) disables the regulator. The rising-edge UVLO threshold is 2.1V typical with 250mV hysteresis, ensuring reliable start-up only within the 2.5V–6V operating range.
How does the internal soft-start function affect startup time?
The 150µs internal soft-start linearly ramps the output voltage from 0V to final regulated value, limiting inrush current to <1.5A. This prevents input rail collapse and eliminates need for external soft-start circuitry, simplifying design for battery-fed systems with weak source impedance.
Is the NC pin (Pin 1) required to be grounded or left floating?
Pin 1 is a true no-connect terminal with no internal connection. It must remain unconnected-neither grounded nor tied to any net. Routing traces or solder mask over Pin 1 is acceptable; connecting it risks unintended coupling or mechanical stress on the bond wire stub.
What is the impact of using a 10µF output capacitor instead of the typical 4.7µF?
A 10µF X5R/X7R ceramic output capacitor reduces peak-to-peak output ripple by ~40% and improves loop stability margin, especially under 1A load transients. It also lowers effective ESR, enhancing PSRR above 100kHz-critical for noise-sensitive analog sensor supplies.
Does MP2136EG-LF-P support forced PWM or power-save mode?
No-MP2136EG-LF-P operates exclusively in forced PWM mode at fixed 2MHz. It does not feature pulse-frequency modulation (PFM) or discontinuous conduction mode (DCM) for light loads. Efficiency at 10mA load is ~75%, optimized for medium-to-heavy load operation rather than ultra-low-power standby.
MP2136EG-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 1A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-QFN (2x2)
MP2136EG-LF-P FAQ
1.How can I place an order for MP2136EG-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2136EG-LF-P 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 MP2136EG-LF-P reliable?
The price and inventory of MP2136EG-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2136EG-LF-P is usually 5 days.
3.What payment methods are accepted for MP2136EG-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2136EG-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2136EG-LF-P?
MP2136EG-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2136EG-LF-P 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 MP2136EG-LF-P?
For technical support, including MP2136EG-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2136EG-LF-P requirements.
6.How does Aetrix verify that MP2136EG-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2136EG-LF-P 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 MP2136EG-LF-P meets industry standards.
7.What is the process for return or replacement of MP2136EG-LF-P?
All MP2136EG-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2136EG-LF-P, 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 MP2136EG-LF-P part is unused and in its original packaging.
Return procedure for MP2136EG-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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