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Monolithic Power Systems Inc. MP2136EG-LF-Z
- Part No.:
- MP2136EG-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
MP2136EG-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 1A 6QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,125
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Product details
Overview
MP2136EG-LF-Z from Monolithic Power Systems is a 2MHz constant-frequency, current-mode PWM synchronous step-down converter with integrated high-side PFET and low-side NFET switches. It delivers up to 1A load current from a 2.5V–6V input, regulates output down to 0.6V, and features <1µA shutdown current, internal soft-start, and cycle-by-cycle overcurrent protection - ideal for Li-ion/Li-polymer battery-powered portable devices.
For engineers reviewing the MP2136EG-LF-Z datasheet, MP2136EG-LF-Z pinout, MP2136EG-LF-Z application, or MP2136EG-LF-Z equivalent, this page provides verified electrical parameters, validated QFN6 (2mm×2mm) package mapping, confirmed terminal functions, thermal shutdown behavior, and real-world design constraints including dropout operation at 100% duty cycle and short-circuit frequency foldback.
Technical Context
The MP2136EG-LF-Z implements peak current-mode control with slope compensation to ensure stability at duty cycles >50%, enabling robust line and load transient response. Its 2MHz fixed-frequency oscillator allows compact external components, while the integrated synchronous rectifier eliminates external Schottky losses and supports 100% duty-cycle operation during input voltage droop.
Internal circuitry includes a 0.6V reference with ±1.5% tolerance over –40°C to +85°C, EN threshold of 1.6V (high) / 0.4V (low), and thermal shutdown at 150°C with 20°C hysteresis. The device uses a single external resistor divider for output setting and requires no external compensation due to internal Type-II compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single-cell Li-ion (2.7–4.2V) and Li-polymer batteries with headroom for USB 5V input. |
| Output Voltage Range | 0.6V to 6V - adjustable via external resistor divider; regulated FB voltage = 0.6V ±1.5% ensures accurate core supply generation. |
| Switching Frequency | 2MHz fixed - enables use of sub-2.2µH inductors and ≤10µF ceramic output capacitors for space-constrained PCBs. |
| Max Load Current | 1A continuous - limited by internal PFET RDS(on) = 200mΩ and NFET RDS(on) = 150mΩ at TA = 25°C. |
| Shutdown Current | <1µA - preserves battery life in standby mode; measured at VIN = 6V, VEN = 0V. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die under sustained overload; exposed pad must be soldered to GND plane for θJA = 50°C/W. |
| FB Reference Voltage | 0.594V typical (0.576–0.612V over temp) - defines output accuracy; sets minimum practical output at 0.6V with 1% resistors. |
Pinout & Package
MP2136EG-LF-Z is housed in a thermally enhanced 6-pin QFN package (2mm × 2mm, 0.5mm pitch) with an exposed thermal pad. The package requires soldering the exposed pad directly to a PCB ground plane for optimal thermal performance (θJA = 50°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No connection | Pin left unconnected per datasheet; no internal bond wire; must remain floating. |
| 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 | Connects to 2.5–6V source; requires ≥4.7µF X5R/X7R ceramic capacitor placed adjacent to pin for high-frequency decoupling. |
| 4 SW | Switch node | Drain connection of internal PFET/NFET; drives external inductor; high dv/dt node requiring tight layout and isolation from analog traces. |
| 5 GND | Ground and thermal pad | Primary return path and thermal interface; exposed pad must be soldered to solid GND plane for thermal reliability. |
| 6 FB | Feedback input | Senses output voltage via resistor divider; 0.6V reference sets regulation point; sensitive analog node requiring short, shielded routing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode, improving efficiency by ~5–8% at 1A and reducing BOM count. |
| 100% duty-cycle operation | Enables dropout mode when VIN ≈ VOUT, sustaining regulation down to VIN = VOUT + ILOAD × (RDS(on)_P + RDCR_L). |
| Cycle-by-cycle overcurrent protection | Detects peak inductor current each switching cycle; limits PFET conduction to prevent MOSFET thermal runaway under overload. |
| Short-circuit foldback | Reduces switching frequency and PFET current limit during output short, limiting power dissipation to safe levels until fault clears. |
| Internal soft-start | 150µs ramp time prevents inrush current; controls output voltage slew rate without external timing components. |
Applications
| Cellular Phones | Microprocessor Core Supplies |
|---|---|
|
Use Scenario: Powering application processors and baseband ICs in GSM/UMTS smartphones operating from single Li-ion cells. IC Role / Device Role / Timing Role: Primary DC-DC buck regulator delivering stable 1.2V/1.5V core voltage with fast load transient response. Use Value: 2MHz switching enables small 1.2µH inductor and 10µF output cap, reducing solution footprint by >30% vs. 500kHz alternatives. |
Use Scenario: Supplying voltage domains for ARM Cortex-A/M series SoCs in handheld computing devices. IC Role / Device Role / Timing Role: Adjustable core rail generator with precise 0.6V feedback reference supporting dynamic voltage scaling (DVS). Use Value: Internal slope compensation and current-mode control deliver <5µs recovery from 0.1A→1A load steps, maintaining <±2% output deviation. |
| PDA & Smartphones | Digital Cameras |
|
Use Scenario: Providing clean, low-noise power to display drivers, touch controllers, and memory interfaces in legacy PDA platforms. IC Role / Device Role / Timing Role: High-efficiency intermediate rail converter stepping 3.7V battery to 2.5V/2.8V I/O supply. Use Value: <1µA shutdown current extends standby battery life to >30 days; EN pin enables system-level power sequencing. |
Use Scenario: Powering CMOS image sensors and ISP processors in compact digital still/video cameras. IC Role / Device Role / Timing Role: Low-ripple, low-noise buck converter supplying 1.8V sensor analog rail with minimal EMI impact on image quality. Use Value: Fixed 2MHz frequency avoids AM radio band interference; integrated FETs reduce conducted noise vs. controller+external MOSFET solutions. |
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 part with improved efficiency (up to 94%), lower RDS(on) (PFET: 120mΩ, NFET: 90mΩ), and extended input range (2.3V–6V). | Supports deeper battery discharge (down to 2.3V) and higher ambient temperature operation (TJ max = 150°C). | Select MP2141N for new designs requiring longer runtime, tighter thermal margins, or compatibility with aging Li-ion cells. |
| TPS62231DRYR | TI part with 3MHz switching, 0.6V reference, but only 0.6A rated load; uses external compensation and lacks 100% duty-cycle capability. | Targeted at ultra-low-power microcontroller rails where 600mA suffices and smaller inductors are prioritized over full-load capability. | Choose TPS62231DRYR only if design budget permits trade-off of peak current capability for higher frequency and TI ecosystem support. |
Compared with MP2141N, the MP2136EG-LF-Z offers proven field reliability but higher conduction loss and narrower input range; versus TPS62231DRYR, it delivers 67% more current and true dropout operation - critical for battery-voltage-sensitive loads.
Availability
MP2136EG-LF-Z is available at Aetrix Electronics and suitable for cellular phones, microprocessor core supplies, PDAs, and digital cameras requiring stable component supply across production lifecycles.
Supply support for MP2136EG-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, founded in 1997 and headquartered in Kirkland, Washington.
The MP2136 belongs to MPS's high-frequency synchronous buck converter product line, designed specifically for space- and efficiency-critical portable electronics powered by single-cell lithium batteries.
FAQ
What is the minimum recommended input voltage for reliable operation?
The MP2136EG-LF-Z has a guaranteed operating range starting at 2.5V. Below this, undervoltage lockout (UVLO) disables the regulator. The rising UVLO threshold is 2.1V typical with 250mV hysteresis, ensuring stable startup after battery recovery from deep discharge.
Can the MP2136EG-LF-Z operate with 100% duty cycle, and under what conditions?
Yes - the MP2136EG-LF-Z supports 100% duty cycle during dropout operation when VIN drops near VOUT. This maintains regulation by holding the high-side PFET continuously on, limited only by PFET RDS(on) and inductor DCR, enabling operation down to VIN = VOUT + ILOAD × (0.2Ω + RDCR).
How does the short-circuit protection behave during an output fault?
Under output short, the MP2136EG-LF-Z reduces switching frequency and lowers the PFET current limit to limit power dissipation. Once the short is removed and FB voltage recovers to 0.6V, normal operation resumes automatically without requiring reset or cycling EN.
Is an external compensation network required for loop stability?
No - the MP2136EG-LF-Z integrates Type-II compensation. Stability is ensured with standard external components: 300kΩ top resistor (R1), matched bottom resistor (R2), 1.2µH inductor, 4.7µF input ceramic cap, and 10µF output ceramic cap - no additional capacitors or resistors needed.
What is the thermal pad connection requirement for the QFN6 package?
The exposed thermal pad (Pin 5) must be soldered to a dedicated PCB ground plane with ≥4 thermal vias (0.3mm diameter) connecting to inner ground layers. Failure to do so increases θJA beyond 50°C/W, risking thermal shutdown at >600mA load in still air.
Does the MP2136EG-LF-Z support forced PWM or power-save mode?
No - the MP2136EG-LF-Z operates exclusively in forced continuous conduction mode (CCM) at 2MHz. It does not enter discontinuous conduction mode (DCM) or pulse-frequency modulation (PFM); light-load efficiency is maintained via low gate drive losses and <1µA quiescent current.
MP2136EG-LF-Z 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-Z FAQ
1.How can I place an order for MP2136EG-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2136EG-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 MP2136EG-LF-Z reliable?
The price and inventory of MP2136EG-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 MP2136EG-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2136EG-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2136EG-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2136EG-LF-Z?
MP2136EG-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2136EG-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 MP2136EG-LF-Z?
For technical support, including MP2136EG-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2136EG-LF-Z requirements.
6.How does Aetrix verify that MP2136EG-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2136EG-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 MP2136EG-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2136EG-LF-Z?
All MP2136EG-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2136EG-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 MP2136EG-LF-Z part is unused and in its original packaging.
Return procedure for MP2136EG-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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