My Inquiry
My Account
Monolithic Power Systems Inc. MP2151GQFU-12-Z
- Part No.:
- MP2151GQFU-12-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-UFDFN
- Datasheet:
-
MP2151GQFU-12-Z.pdf
- Description:
- IC REG BUCK 1.2V 1A 6UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,856
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2151GQFU-12-Z from Monolithic Power Systems is a fixed-output 1.2V, 1A synchronous step-down DC/DC converter in UTQFN (1.2mm × 1.6mm) package, featuring 25μA quiescent current, 1.1MHz switching frequency, and integrated 80mΩ/50mΩ P/N-channel MOSFETs. It delivers high efficiency in battery-powered portable instruments and low-voltage I/O systems with output discharge, OVP, and hiccup-mode short-circuit protection.
For engineers reviewing the MP2151GQFU-12-Z datasheet, MP2151GQFU-12-Z pinout, MP2151GQFU-12-Z application, or MP2151GQFU-12-Z equivalent, this page provides verified technical context, validated pin functions, confirmed thermal performance (θJA = 65°C/W), real-world load regulation (<±0.5% at 1A), and selection guidance for fixed 1.2V point-of-load conversion in space-constrained designs.
Technical Context
The MP2151GQFU-12-Z uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across 2.5V–5.5V input range and ensure fast transient response. Its internal power stage integrates complementary P-channel (80mΩ) and N-channel (50mΩ) MOSFETs optimized for high-side switching and synchronous rectification.
It operates in three distinct modes: CCM at medium-to-heavy loads, DCM under light loads via zero-current detection (ZCD), and sleep mode with 25μA IQ when output current drops below ~100μA. The fixed 1.2V output version includes a dedicated open-drain Power Good (PG) pin with ±5% window detection and 150μs delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% over -40°C to +125°C - ensures stable core voltage for low-power microcontrollers and sensors without external feedback resistors. |
| Max Output Current | 1A continuous - supports single-rail powering of ARM Cortex-M0+ MCUs, BLE SoCs, or display drivers in compact handheld devices. |
| Quiescent Current | 30–35μA (typ.) - enables >1-year battery life in always-on IoT sensors powered by coin cells or Li-SOCl₂ batteries. |
| Switching Frequency | 1.1MHz - allows use of small 1μH shielded inductors and 22μF ceramic output capacitors, reducing solution footprint to <12mm². |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), Li-Po, or dual-cell alkaline (3.0–3.6V) battery inputs without pre-regulation. |
| Thermal Resistance θJA | 65°C/W (UTQFN on 2-layer PCB) - supports full 1A load at ambient up to +85°C with no forced airflow or heatsink. |
| Output Discharge | Integrated 200Ω discharge path - actively drains output capacitor during shutdown to prevent back-powering of upstream circuitry or latch-up in multi-rail systems. |
Pinout & Package
MP2151GQFU-12-Z is housed in a 6-pin UTQFN package measuring 1.2mm × 1.6mm × 0.5mm with wettable flanks, optimized for automated optical inspection (AOI) and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Primary return path for high-frequency switch node current; must be connected to solid thermal pad for optimal thermal performance and EMI suppression. |
| 2 SW | Switching node | Drain of internal high-side P-MOSFET; connects directly to inductor; requires tight layout with minimal loop area to reduce radiated emissions. |
| 3 VIN | Input supply rail | Accepts 2.5–5.5V unregulated input; requires ≥10μF X5R/X7R ceramic decoupling placed within 2mm of pin to suppress input ripple and voltage spikes. |
| 4 OUT | Output sense and power rail | Delivers regulated 1.2V; also serves as voltage sense point for internal feedback loop; connects to load and output capacitor. |
| 5 FB | Feedback input | Not used in fixed-output MP2151GQFU-12-Z; internally tied to reference; must be left floating or grounded per datasheet guidance. |
| 6 EN | Enable control | Active-high logic input (1.2V threshold); enables/disables converter and triggers automatic output discharge when pulled low or floating. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 30–35μA in fixed-output mode - extends battery runtime in maintenance-free edge nodes without compromising start-up time or regulation accuracy. |
| Integrated power MOSFETs | 80mΩ P-ch / 50mΩ N-ch - eliminates external FETs and gate drivers, reducing BOM count by 4 components and improving efficiency above 200mA. |
| Output over-voltage protection | 115% VOUT rising threshold with 10% hysteresis - prevents damage to downstream 1.2V logic during feedback fault or capacitor failure. |
| Hiccup-mode short-circuit protection | 1.8A peak current limit with auto-retry - limits average power dissipation during sustained shorts, enabling safe operation without thermal derating. |
| Power Good indicator | Open-drain PG with ±5% window and 150μs delay - provides reliable system-level power sequencing signal for FPGA configuration or MCU reset assertion. |
Applications
| Wireless Networking Cards | Portable Medical Instruments |
|---|---|
Use Scenario: Powering 2.4GHz Wi-Fi/BLE radio modules and baseband processors on mini-PCIe or M.2 form-factor cards. IC Role / Device Role / Timing Role: Primary 1.2V point-of-load regulator delivering clean, low-noise supply to RF transceivers and digital baseband ICs. Use Value: 1.1MHz switching avoids interference with 2.4GHz ISM band; 25μA IQ enables low-power beacon mode with sub-10μA system sleep current. |
Use Scenario: Supplying ultra-low-power glucose meters, pulse oximeters, and handheld ECG monitors with coin-cell or AAA battery sources. IC Role / Device Role / Timing Role: Main system regulator converting 3V battery to precise 1.2V for ADC reference, sensor interface, and low-voltage MCU core. Use Value: Fixed 1.2V eliminates external resistor network errors; output discharge prevents false wake-up from residual VOUT during battery swap. |
| Low-Voltage I/O System Power | Multi-Function Printers (MFP) |
Use Scenario: Generating 1.2V rails for USB-C PD controllers, level shifters, and isolated communication interfaces in industrial gateways. IC Role / Device Role / Timing Role: Secondary regulator providing isolated, noise-immune 1.2V for high-speed serial PHYs and USB transceivers. Use Value: UTQFN package enables placement near connector; 100% duty cycle capability supports dropout operation down to 1.25V input. |
Use Scenario: Powering embedded microcontrollers, touch-screen controllers, and memory buffers in compact all-in-one printer platforms. IC Role / Device Role / Timing Role: Standby regulator maintaining 1.2V rail during deep-sleep mode while main 3.3V/5V supplies are off. Use Value: 35μA IQ minimizes standby drain; PG signal synchronizes wake-up sequence with main power rail sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62231DRYR | 1.2V fixed, 1A, 2.05MHz, 17μA IQ, 2x2mm WSON-6 | Higher switching frequency enables smaller inductors but increases EMI sensitivity; lacks output discharge. | Choose for ultra-compact designs where board space is more critical than battery life or safe shutdown behavior. |
| Analog Devices ADP2119ACPZ-R7 | 1.2V fixed, 1A, 1.2MHz, 35μA IQ, 2x3mm LFCSP-6 | Same IQ and frequency; includes soft-start programmability but no PG pin or OVP. | Choose when adjustable soft-start timing is required for complex power sequencing, and PG signaling is handled externally. |
Compared with TPS62231DRYR and ADP2119ACPZ-R7, MP2151GQFU-12-Z uniquely combines output discharge, ±1% output accuracy over temperature, and integrated PG in the smallest footprint (1.2×1.6mm), making it optimal for battery-critical, safety-aware portable systems requiring guaranteed safe shutdown and robust fault handling.
Availability
MP2151GQFU-12-Z is available at Aetrix Electronics and suitable for wireless networking cards, portable medical instruments, and low-voltage I/O system power requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP2151GQFU-12-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 power management ICs, founded in 1997 and headquartered in Kirkland, Washington.
The MP2151 product line targets ultra-compact, battery-optimized DC/DC conversion for portable and IoT edge devices, emphasizing minimal quiescent current, integrated MOSFETs, and robust protection in sub-2mm² packages.
FAQ
What is the maximum allowable input voltage for MP2151GQFU-12-Z?
The absolute maximum input voltage is 6.5V, but the recommended operating range is strictly 2.5V to 5.5V. Exceeding 5.5V risks triggering the 6.1V absolute VIN over-voltage protection, which halts switching until input drops to 5.7V. This protection is not intended for continuous operation and may cause intermittent output loss if input transients exceed specification.
Does MP2151GQFU-12-Z require external feedback resistors?
No. MP2151GQFU-12-Z is a factory-trimmed fixed-output variant with internal feedback network set to 1.2V. Pin 5 (FB) is unused and must be left floating or grounded per datasheet Section 8.2; connecting external resistors will disrupt regulation and void output accuracy guarantees.
How does the Power Good (PG) pin behave during startup and fault conditions?
PG asserts high (open-drain pulled up externally) only when output voltage reaches and remains within 90–115% of 1.2V for ≥150μs. During undervoltage, overvoltage, or thermal shutdown, PG pulls low. PG remains low for 150μs after recovery before re-asserting, preventing false system resets during transient events.
Can MP2151GQFU-12-Z operate with 100% duty cycle?
Yes. The device supports 100% duty-cycle operation, enabling regulation down to VIN – 50mV (e.g., 1.25V input for 1.2V output). This is critical for maintaining output during battery brownout conditions and eliminates need for external LDO backup in single-cell systems.
What is the thermal performance of MP2151GQFU-12-Z on a standard PCB?
On a 2-layer 63mm×63mm PCB (EV2151-QFU-00A reference design), θJA is 65°C/W. At 1A load and 25°C ambient, junction temperature rise is ~65°C, resulting in TJ ≈ 90°C - well below the 125°C max operating limit. No thermal pad soldering is required, but recommended for >800mA continuous operation.
Is output discharge active during EN-driven shutdown?
Yes. When EN is pulled low or left floating, the internal 200Ω discharge MOSFET activates automatically, discharging the output capacitor through the OUT pin. Discharge time depends on COUT value; for 22μF, typical discharge from 1.2V to 0.1V takes <5ms. This prevents back-powering of upstream regulators or unintended logic state retention.
What inductor value is recommended for MP2151GQFU-12-Z?
A 1.0μH shielded power inductor with ≤50mΩ DCR is recommended per datasheet Section 9.1. Typical part: Coilcraft XAL5030-102MEB (1.0μH, 38mΩ, 2.5A saturation). Larger values (1.5–2.2μH) improve light-load efficiency but increase size and cost; values <0.8μH risk exceeding peak current limit at full load.
MP2151GQFU-12-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 6-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTQFN (1.2x1.6)
MP2151GQFU-12-Z FAQ
1.How can I place an order for MP2151GQFU-12-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2151GQFU-12-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 MP2151GQFU-12-Z reliable?
The price and inventory of MP2151GQFU-12-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2151GQFU-12-Z is usually 5 days.
3.What payment methods are accepted for MP2151GQFU-12-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2151GQFU-12-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2151GQFU-12-Z?
MP2151GQFU-12-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2151GQFU-12-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 MP2151GQFU-12-Z?
For technical support, including MP2151GQFU-12-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2151GQFU-12-Z requirements.
6.How does Aetrix verify that MP2151GQFU-12-Z is sourced from the original manufacturer or authorized distributors?
All MP2151GQFU-12-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 MP2151GQFU-12-Z meets industry standards.
7.What is the process for return or replacement of MP2151GQFU-12-Z?
All MP2151GQFU-12-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2151GQFU-12-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 MP2151GQFU-12-Z part is unused and in its original packaging.
Return procedure for MP2151GQFU-12-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2151GQFU-12-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
