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Monolithic Power Systems Inc. MP2155GQ-P
- Part No.:
- MP2155GQ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2155GQ-P.pdf
- Description:
- IC REG BUCK BOOST ADJ/1.5V 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,964
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Product details
Overview
MP2155GQ-P from Monolithic Power Systems is a high-efficiency, single-inductor buck-boost DC/DC converter with integrated 2.2A N-channel and P-channel MOSFETs, operating across input voltages of 2V–5.5V to deliver adjustable output (1.5V–5V) in battery-powered systems where Vin may fall above, below, or equal to Vout. It delivers up to 1A at 3.3V output from 2.7V–5.5V input, features 1MHz fixed-frequency PWM control, and supports pulse-skipping mode for ultra-low quiescent current (80μA typical).
For engineers reviewing the MP2155GQ-P datasheet, MP2155GQ-P pinout, MP2155GQ-P application, or MP2155GQ-P equivalent, this device is selected for compact, wide-input-range power conversion in portable electronics requiring seamless buck/boost transition, low-noise fixed-frequency operation via MODE pin control, and robust thermal/overcurrent protection.
Technical Context
The MP2155 employs peak current-mode control with internal loop compensation and dual error amplifiers (VC-Buck and VC-Boost), enabling automatic topology selection-buck when Vin ≫ Vout, boost when Vin ≪ Vout, and buck-boost when Vin ≈ Vout-via dynamic ramp offset and level-shifted control signals. Its architecture avoids external compensation components while maintaining stability across load and input variations.
It integrates two independent current limits: primary limit (1.8–2.2A) for steady-state PWM operation and secondary limit (1.8A) for startup inrush suppression. Protection includes hiccup-mode short-circuit response triggered when Vout drops below 60% of regulation, over-temperature shutdown at 160°C (20°C hysteresis), and under-voltage lockout on VCC (1.6V falling, 1.8V rising).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V to 5.5V - supports single-cell Li-ion (2.7–4.2V) and multi-cell alkaline (2–5.5V) without pre-regulation. |
| Output Voltage Range | 1.5V to 5V - set externally via FB resistor divider; enables flexible rail generation for MCU, RF, and analog subsystems. |
| Switching Frequency | 1MHz (±10%) - enables use of small 3.3µH inductors and ceramic capacitors, minimizing solution footprint. |
| Peak Switch Current | 2.2A - integrated N- and P-MOSFETs with RDS(ON)-N = 105mΩ and RDS(ON)-P = 120mΩ ensure >95% efficiency at 1A/3.3V. |
| Quiescent Current | 80μA typical - extends battery life in always-on or low-duty-cycle portable applications. |
| Protection Features | OTP (160°C), hiccup-mode SCP, UVLO (1.6V/1.8V), soft-start, and load disconnect during shutdown. |
Pinout & Package
MP2155GQ-P is housed in a thermally enhanced QFN10 package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad (EP) tied to PGND for optimal heat dissipation. The 10-pin layout supports compact PCB routing and high-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output node | Delivers final buck-boost output; connects to output capacitor and load; requires low-ESR ceramic decoupling. |
| SW2 (Pin 2) | Switch node (high-side boost / low-side buck) | Connects to one end of power inductor; carries high di/dt switching current; must be routed with minimal loop area. |
| PGND (Pin 3) | Power ground return | Primary return path for high-current switch paths; must be connected directly to EP and input/output capacitors. |
| SW1 (Pin 4) | Switch node (low-side boost / high-side buck) | Connects to other end of power inductor; complements SW2 in 4-switch buck-boost topology. |
| VIN (Pin 5) | Main power input | Supplies power stage; accepts 2V–5.5V; requires local 10µF ceramic capacitor placed adjacent to pin. |
| EN (Pin 6) | Enable control input | Active-high logic control; pulls device into full shutdown (<1μA IQ) when low; must not float. |
| MODE/SYNC (Pin 7) | Operation mode selection | Low = auto PSM/PWM; high = forced fixed-frequency PWM; also accepts external clock (1–2MHz) for synchronization. |
| VCC (Pin 8) | Control-stage supply | Bias supply for internal circuitry; derived from VIN but regulated internally; requires local bypass capacitor. |
| AGND (Pin 9) | Analog ground reference | Signal ground for FB, EN, MODE; must be connected externally to PGND at single point to avoid noise coupling. |
| FB (Pin 10) | Feedback input | Senses output voltage via resistor divider; internal 496mV reference sets VOUT = 496mV × (1 + R1/R2); trace must avoid SW nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor 4-switch buck-boost topology | Eliminates need for separate buck and boost converters or complex magnetic designs; reduces BOM count and board space. |
| Internal loop compensation | Removes requirement for external compensation network, simplifying design and improving consistency across production units. |
| Pulse-skipping mode (PSM) with MODE pin override | Enables <80μA IQ at light load while allowing deterministic 1MHz operation for noise-sensitive applications like audio or RF. |
| Hiccup-mode short-circuit protection | Prevents thermal runaway during sustained overload or output short by cycling soft-start after fault detection. |
| Integrated 2.2A MOSFETs with low RDS(ON) | N- and P-channel switches reduce conduction loss and eliminate external FETs, enabling fully integrated 3.3V/1A solutions in <15mm² area. |
Applications
| Portable Medical Sensors | Handheld POS Terminals |
|---|---|
|
Use Scenario: Wearable glucose monitors powered by single Li-ion cell (2.7–4.2V) requiring stable 3.3V for MCU and 5V for BLE radio. IC Role / Device Role / Timing Role: Single-chip buck-boost regulator managing dynamic input collapse during battery discharge while maintaining regulated dual-rail outputs. Use Value: Eliminates need for discrete boost + LDO chain; maintains >90% efficiency across full battery range without manual mode switching. |
Use Scenario: Battery-backed retail terminal using alkaline AA/AAA cells (2–5.5V) powering 3.3V display controller and 5V thermal printer interface. IC Role / Device Role / Timing Role: Wide-input DC/DC converter delivering consistent output despite voltage sag under pulse loads (e.g., printer activation). Use Value: Sustains 1A load at 3.3V even at 2.7V input; MODE pin forces PWM during printing to prevent audible coil whine. |
| Tablet PC Subsystem Rails | GSM/GPRS Modem Power |
|
Use Scenario: Auxiliary power rail in 7-inch tablet for camera ISP and touch controller, supplied from shared battery bus (3–4.2V). IC Role / Device Role / Timing Role: Efficient intermediate converter generating 1.8V or 2.8V from varying battery voltage without requiring system-level voltage sequencing. Use Value: Internal soft-start prevents inrush-induced brownout on main SoC rail; FB accuracy (±2%) ensures compliance with sensor voltage tolerances. |
Use Scenario: Compact GSM module in asset tracker using single Li-ion cell (3.4–4.2V nominal) needing 4.0V for PA bias and 3.3V for baseband IC. IC Role / Device Role / Timing Role: High-efficiency buck-boost providing stable 4V output even as battery drops to 3.2V during transmission bursts. Use Value: 2.2A switches handle 1.5A peak PA current without derating; thermal shutdown (160°C) protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Lower max output current (0.6A vs. 1A), higher quiescent current (360μA), no MODE pin for PWM forcing. | Limited to sub-500mA loads; unsuitable for 1A 3.3V rails or noise-sensitive fixed-frequency use cases. | Select only if lower cost and reduced feature set are acceptable for light-load portable devices. |
| MAX77827AEWE+T | Higher input range (1.8–5.5V), integrated I2C interface, but larger 16-pin WLP package and no pulse-skipping mode. | Requires digital configuration; better for programmable multi-rail systems, worse for simple analog-only designs. | Choose when dynamic output adjustment or telemetry is required; avoid for cost- and size-constrained analog-only designs. |
Compared with TPS63020DSJR and MAX77827AEWE+T, MP2155GQ-P uniquely balances 1A capability, 80μA IQ, 1MHz fixed-frequency option, and QFN10 compactness-making it optimal for space-constrained, battery-life-critical 3.3V/5V rails without digital overhead.
Availability
MP2155GQ-P is available at Aetrix Electronics and suitable for portable medical sensors, handheld POS terminals, tablet PC subsystem rails, and GSM/GPRS modem power applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP2155GQ-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 power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2155 belongs to MPS's high-efficiency buck-boost converter product line, engineered specifically for battery-powered portable electronics that demand seamless voltage regulation across collapsing input ranges without sacrificing size or efficiency.
FAQ
What is the maximum continuous output current MP2155GQ-P can deliver at 3.3V?
MP2155GQ-P delivers up to 1A continuous output current at 3.3V when input voltage is between 2.7V and 5.5V, verified per datasheet Figure 6 and electrical characteristics table. Performance assumes proper thermal management via the exposed pad and recommended PCB layout with ≥2 oz copper on PGND plane.
How does the MODE pin affect operation in light-load conditions?
When MODE is pulled low (<0.4V), MP2155GQ-P automatically enters pulse-skipping mode (PSM) under light load, reducing switching frequency and quiescent current to ~80μA. When pulled high (>1.2V), it remains in fixed 1MHz PWM regardless of load-critical for EMI-sensitive applications like audio or RF circuits.
Can MP2155GQ-P operate with a 2V input supply?
Yes-MP2155GQ-P supports input voltages down to 2V, enabling operation with deeply discharged single-cell Li-ion or multi-cell alkaline batteries. At 2V input, output is limited to ≤3.3V (per absolute max ratings and functional specs), and efficiency drops due to higher conduction losses in internal MOSFETs.
What protection mechanisms prevent damage during output short-circuit events?
MP2155GQ-P uses hiccup-mode short-circuit protection: upon sustained overload causing Vout to drop below 60% of target, it disables switching, waits for thermal recovery, then initiates soft-start. This cycle repeats until fault clears, preventing thermal runaway and ensuring safe operation without external circuitry.
Is external compensation required for stable loop response?
No-MP2155GQ-P integrates full internal loop compensation, eliminating external compensation components. Stability is guaranteed across all operating conditions (2V–5.5V input, 1.5V–5V output, 0–1A load) per datasheet AC performance plots and application note guidelines.
What is the recommended minimum output capacitance?
The datasheet specifies a minimum 2×22µF ceramic output capacitance (44µF total) for stable 3.3V/1A operation. Lower values risk instability or excessive ripple; X5R/X7R dielectrics with ≤5mΩ ESR are required to maintain phase margin and transient response per Figure 10–13 test conditions.
Does MP2155GQ-P support synchronization to an external clock?
Yes-when MODE/SYNC pin is driven with a clean 1–2MHz square wave (CMOS level), MP2155GQ-P synchronizes its internal oscillator to that frequency, enabling EMI reduction through frequency dithering or alignment with system clocks in multi-rail power architectures.
MP2155GQ-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V (3.3V)
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1A, 2.2A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP2155GQ-P FAQ
1.How can I place an order for MP2155GQ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2155GQ-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 MP2155GQ-P reliable?
The price and inventory of MP2155GQ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2155GQ-P is usually 5 days.
3.What payment methods are accepted for MP2155GQ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2155GQ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2155GQ-P?
MP2155GQ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2155GQ-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 MP2155GQ-P?
For technical support, including MP2155GQ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2155GQ-P requirements.
6.How does Aetrix verify that MP2155GQ-P is sourced from the original manufacturer or authorized distributors?
All MP2155GQ-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 MP2155GQ-P meets industry standards.
7.What is the process for return or replacement of MP2155GQ-P?
All MP2155GQ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2155GQ-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 MP2155GQ-P part is unused and in its original packaging.
Return procedure for MP2155GQ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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