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Monolithic Power Systems Inc. MP2151GTF-P
- Part No.:
- MP2151GTF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-563, SOT-666
- Datasheet:
-
MP2151GTF-P.pdf
- Description:
- IC REG 1A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:3,389
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Product details
Overview
MP2151GTF-P from Monolithic Power Systems is a synchronous step-down DC/DC converter IC delivering 1A continuous output current with 25μA quiescent current, 1.1MHz switching frequency, and adjustable 0.6V–5.5V output via external resistor divider. It integrates 80mΩ high-side and 50mΩ low-side MOSFETs, supports 2.5V–5.5V input, and features output discharge, OVP, SCP, and thermal shutdown - deployed in portable instrumentation and battery-powered I/O rails.
For engineers reviewing the MP2151GTF-P datasheet, MP2151GTF-P pinout, MP2151GTF-P application, or MP2151GTF-P equivalent, key selection criteria include ultra-low IQ for always-on subsystems, COT control for fast load transients, SOT563 package footprint constraints, and EN-controlled power sequencing in space-constrained embedded designs.
Technical Context
The MP2151GTF-P uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across 2.5V–5.5V input and 0.6V–3.3V output ranges. Its internal P-channel high-side (80mΩ) and N-channel low-side (50mΩ) MOSFETs enable synchronous rectification without external diodes.
It implements sleep-mode AAM operation with zero-current detection (ZCD) to sustain >85% efficiency at 1mA load, while cycle-by-cycle current limiting (1.8A typ), hiccup-mode short-circuit protection, and 100% duty-cycle capability support robust operation in transient-heavy battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - powers directly from single-cell Li-ion or USB VBUS without pre-regulation. |
| Output Current | 1A continuous - sustains full load in compact portable devices with minimal thermal derating in SOT563. |
| Quiescent Current | 25μA - enables >1-year battery life in always-on sensor nodes with 100mAh coin cell. |
| Switching Frequency | 1.1MHz - allows use of 1μH inductors <2mm² footprint, reducing solution size vs. 500kHz alternatives. |
| Feedback Accuracy | ±1% over -40°C to +125°C - ensures stable core voltage for DSPs and microcontrollers under thermal stress. |
| Internal MOSFET RDS(ON) | 80mΩ (HS) / 50mΩ (LS) - eliminates external FETs and reduces BOM count in space-limited designs. |
| Output Discharge | Integrated 200Ω discharge path - prevents floating rail during shutdown, meeting IEC 62368-1 safety requirements. |
Pinout & Package
SOT563 (1.6mm × 1.6mm × 0.55mm) thermally enhanced 6-pin package with exposed pad; optimized for low-profile portable PCBs requiring <1.0mm height clearance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Primary thermal and noise return path; must be connected to large copper pour for thermal dissipation and EMI control. |
| SW (Pin 2) | Switching node | Drain of internal high-side P-MOSFET; connects directly to inductor; requires tight layout to minimize ringing and EMI. |
| VIN (Pin 3) | Input supply | Accepts 2.5V–5.5V unregulated input; requires local 10μF ceramic capacitor placed within 2mm of pin. |
| EN (Pin 4) | Enable control | Active-high logic input (1.2V threshold); internal 1MΩ pulldown enables default-disable behavior when left floating. |
| FB (Pin 5) | Feedback input | Resistor-divider tap point; regulates output to 0.6V reference; accuracy ±1% enables precise 1.2V/1.8V/3.3V rails. |
| OUT (Pin 6) | Output power rail | Delivers regulated output; also serves as output sense point; connects to load and 10μF–22μF output capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 25μA enables multi-year battery operation in IoT sensors and wearables without compromising regulation. |
| Constant-on-time (COT) control | Delivers sub-10μs load transient response without external compensation components. |
| Integrated output discharge | 200Ω internal MOSFET safely discharges output capacitors during shutdown, eliminating need for external circuitry. |
| 100% duty-cycle capability | Permits dropout operation down to VIN – VOUT ≈ 0V, supporting applications where input may dip near output voltage. |
| Thermal shutdown with hysteresis | 160°C trip with 30°C hysteresis prevents thermal cycling and ensures reliable recovery after overload. |
Applications
| Wireless Networking Cards | Portable Instruments |
|---|---|
Use Scenario: Powering RF front-end ICs and baseband processors on mini-PCIe Wi-Fi modules with strict 12mm × 12mm board area. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V buck regulator supplying SoC core and I/O domains with fast transient response to burst TX/RX events. Use Value: 25μA IQ extends module standby time; 1.1MHz switching avoids interference with 2.4GHz/5GHz bands; SOT563 footprint fits dense RF layouts. |
Use Scenario: Supplying precision ADCs, op-amps, and microcontrollers in handheld multimeters and gas detectors. IC Role / Device Role / Timing Role: Low-noise, high-accuracy 3.3V rail generator with ±1% FB tolerance ensuring measurement stability across temperature. Use Value: Output discharge prevents residual voltage from corrupting ADC reference during power cycling; COT control rejects line ripple from battery aging. |
| Battery-Powered Medical Sensors | Low-Voltage I/O System Power |
Use Scenario: Providing regulated 1.8V for BLE SoCs and analog front-ends in wearable ECG patches powered by CR2032 cells. IC Role / Device Role / Timing Role: Always-on power management IC enabling wake-on-event functionality with sub-100μA system sleep current. Use Value: 25μA IQ dominates total system quiescent budget; integrated discharge meets medical safety standards for rapid rail collapse. |
Use Scenario: Generating 0.9V–1.2V core rails for FPGA I/O banks and interface transceivers in industrial edge gateways. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load converter replacing discrete solutions in 10-layer HDI PCBs. Use Value: 80mΩ/50mΩ MOSFETs reduce conduction loss at 1A; 100% duty cycle maintains regulation during brownout conditions. |
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 |
|---|---|---|---|
| TI TPS62840YNYR | 200nA IQ, 1.8V–5.5V input, fixed 1.8V output only; no adjustable version; 1.8MHz switching. | Lacks output adjustability and discharge function; suited only for fixed-rail, ultra-low-power apps where 1.8V suffices. | Select if IQ < 100nA is mandatory and output voltage is fixed; avoid if adjustable Vo or discharge is required. |
| Analog Devices LT3668EDD#TRPBF | 40μA IQ, 3.3V–42V input, 1A output, includes PG pin and spread-spectrum modulation. | Higher Vin range and EMI reduction features; larger 10-lead DFN package; no output discharge. | Choose for industrial 24V input systems needing robustness; not suitable for space-constrained 5V battery apps. |
Compared with TPS62840YNYR and LT3668EDD#TRPBF, MP2151GTF-P uniquely balances ultra-low IQ (25μA), full output adjustability (0.6V–5.5V), integrated discharge, and SOT563 footprint - making it optimal for portable, battery-sensitive designs requiring design flexibility and safety compliance.
Availability
MP2151GTF-P is available at Aetrix Electronics and suitable for wireless networking cards, portable instrumentation, and battery-powered medical sensors requiring stable component supply with guaranteed long-term sourcing.
Supply support for MP2151GTF-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 power management ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP2151 belongs to MPS's ultra-low-IQ synchronous buck converter product line, engineered specifically for battery-operated portable electronics where extended runtime and minimal solution size are critical design constraints.
FAQ
What is the minimum output voltage supported by MP2151GTF-P?
The MP2151GTF-P supports output voltages as low as 0.6V, set by the internal feedback reference voltage. This enables direct powering of modern ultra-low-voltage cores such as ARM Cortex-M0+ or RISC-V microcontrollers operating at 0.8V–1.2V nominal rails using an external resistor divider.
Does MP2151GTF-P require an external bootstrap capacitor?
No. The MP2151GTF-P uses a P-channel high-side MOSFET, eliminating the need for a bootstrap capacitor or dedicated high-side gate driver circuitry. This simplifies layout, reduces component count, and improves reliability in compact designs.
How does the output discharge function operate during shutdown?
When EN is pulled low, the MP2151GTF-P activates an internal 200Ω discharge MOSFET between OUT and GND, actively sinking current from the output capacitor. This ensures the output rail collapses within milliseconds, preventing latch-up or unintended operation of downstream logic.
Can MP2151GTF-P operate in 100% duty cycle mode, and under what conditions?
Yes. The MP2151GTF-P supports 100% duty cycle operation when the input voltage approaches or equals the regulated output voltage - for example, delivering 3.3V from a 3.6V Li-ion cell at end-of-discharge. This maintains regulation without dropout, unlike fixed-frequency PWM converters.
What thermal performance can be expected in the SOT563 package at 1A load?
In a standard 2-layer PCB layout (63mm × 63mm, 1oz copper), the SOT563 package delivers θJA = 80°C/W. At 1A output with 5V input and 1.2V output, typical power dissipation is ~180mW, resulting in ~14°C junction-to-ambient rise - well within the -40°C to +125°C operating range.
Is the EN pin internally pulled down, and what is its logic threshold?
Yes. The EN pin includes an internal 1MΩ pull-down resistor to GND. It asserts active-high enable when voltage exceeds 1.2V (typical) and disables below 0.4V (logic low). This allows direct connection to GPIOs or open-drain sequencers without external biasing.
Does MP2151GTF-P support forced PWM or skip-mode operation?
No. The MP2151GTF-P uses adaptive asynchronous modulation (AAM) with zero-current detection for light-load efficiency - automatically transitioning between CCM, DCM, and sleep modes. It does not offer user-selectable PWM/skip mode; operation is fully autonomous based on load and input conditions.
MP2151GTF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- *
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
MP2151GTF-P FAQ
1.How can I place an order for MP2151GTF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2151GTF-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 MP2151GTF-P reliable?
The price and inventory of MP2151GTF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2151GTF-P is usually 5 days.
3.What payment methods are accepted for MP2151GTF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2151GTF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2151GTF-P?
MP2151GTF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2151GTF-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 MP2151GTF-P?
For technical support, including MP2151GTF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2151GTF-P requirements.
6.How does Aetrix verify that MP2151GTF-P is sourced from the original manufacturer or authorized distributors?
All MP2151GTF-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 MP2151GTF-P meets industry standards.
7.What is the process for return or replacement of MP2151GTF-P?
All MP2151GTF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2151GTF-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 MP2151GTF-P part is unused and in its original packaging.
Return procedure for MP2151GTF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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