My Inquiry
My Account
Monolithic Power Systems Inc. MP2151GTF-12-Z
- Part No.:
- MP2151GTF-12-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-563, SOT-666
- Datasheet:
-
MP2151GTF-12-Z.pdf
- Description:
- IC REG BUCK 1.2V 1A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:3,709
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2151GTF-12-Z from Monolithic Power Systems is a fixed-output 1.2V, 1A synchronous step-down DC/DC converter with 25μA quiescent current, 1.1MHz switching frequency, and integrated 80mΩ/50mΩ MOSFETs in SOT563 package. It delivers stable power to low-voltage I/O rails in portable instruments and battery-powered devices with output discharge, OVP, and hiccup-mode short-circuit protection.
For engineers reviewing the MP2151GTF-12-Z datasheet, MP2151GTF-12-Z pinout, MP2151GTF-12-Z application, or MP2151GTF-12-Z equivalent, key selection criteria include its fixed 1.2V output accuracy (±1%), EN-controlled sequencing, PG indicator for system monitoring, ultra-low IQ for standby operation, and thermal shutdown at 160°C.
Technical Context
The MP2151GTF-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. Its internal high-side P-channel and low-side N-channel MOSFETs enable synchronous rectification without external diodes.
It integrates output discharge via an internal 200Ω resistor when disabled, supports power sequencing via EN with 1.2V logic-high threshold, and provides open-drain Power Good (PG) signaling with ±5% window and 150μs delay-features exclusive to fixed-output variants like this part.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% over -40°C to +125°C - ensures precise rail regulation for sensitive logic cores. |
| Max Output Current | 1A continuous - supports single-core microcontrollers and low-power FPGAs without external current boosting. |
| Quiescent Current | 30–35μA in active mode - enables >1-year battery life in always-on sensor nodes with 200mAh coin cells. |
| Switching Frequency | 1.1MHz typical - allows use of compact 1μH inductors and reduces EMI filtering burden. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single Li-ion, 3.3V rails, and USB-powered systems. |
| Internal MOSFET RDS(ON) | 80mΩ (HS), 50mΩ (LS) - minimizes conduction loss and eliminates need for external sync rectifier. |
| Power Good Accuracy | ±5% window (90%/115% thresholds) with 150μs delay - provides reliable system reset timing for sequenced power-up. |
Pinout & Package
SOT563 package (1.6mm × 1.6mm × 0.55mm), thermally enhanced with exposed pad (not electrically connected). Pin 1 = GND, Pin 2 = SW, Pin 3 = VIN, Pin 4 = EN, Pin 5 = PG, Pin 6 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power ground reference | Primary return path for high-current switching loop; must be low-inductance connection to minimize noise coupling. |
| SW | Switch node | Drain of internal high-side P-MOSFET; connects directly to inductor; critical for EMI and efficiency layout. |
| VIN | Input supply | Accepts 2.5–5.5V unregulated input; requires local 10μF ceramic decoupling adjacent to pin. |
| EN | Enable control | Active-high logic input (1.2V min); internal 1MΩ pull-down allows floating-disable; 150μs turn-on delay. |
| PG | Power good indicator | Open-drain output requiring external 100–500kΩ pull-up to VIN; asserts high when VOUT is within ±5% of 1.2V. |
| OUT | Output power rail | Main power output and sense point; connects to load and output capacitor; internal discharge path activates when EN = low. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.2V output with 1% FB accuracy | Eliminates external feedback resistors, reducing BOM count and layout sensitivity to trace parasitics. |
| Output discharge on disable | 200Ω internal discharge path safely bleeds output capacitance in <10ms - prevents back-powering or latch-up in multi-rail systems. |
| 1.1MHz COT control | Enables fast transient response (<10μs recovery from 0→1A load step) without external compensation components. |
| Hiccup-mode short-circuit protection | Shuts down for 2ms, discharges soft-start cap, then retries - protects MOSFETs and inductor during sustained fault conditions. |
| Thermal shutdown with 30°C hysteresis | Halts switching at 160°C junction temperature and resumes only after cooling to 130°C - prevents cumulative thermal stress. |
Applications
| Wireless Networking Cards | Portable Instruments |
|---|---|
Use Scenario: Powering 1.2V core voltage for Wi-Fi/BLE SoCs in compact M.2 or mini-PCIe modules. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 1.2V at up to 1A with EN-controlled wake/sleep sequencing. Use Value: Ultra-small SOT563 footprint saves PCB area; 25μA IQ extends battery runtime between transmissions; PG signal synchronizes RF initialization. | Use Scenario: Supplying precision analog front-end and microcontroller core in handheld multimeters or gas detectors. IC Role / Device Role / Timing Role: Fixed-output buck converter providing clean, low-noise 1.2V rail with tight regulation (±1%) across temperature. Use Value: Integrated MOSFETs eliminate external component count; output discharge prevents measurement drift during power cycling; thermal shutdown ensures field reliability. |
| Battery-Powered Medical Sensors | Low-Voltage I/O System Power |
Use Scenario: Powering wearable ECG/PPG sensors operating from CR2032 or LiPo cells with intermittent BLE transmission. IC Role / Device Role / Timing Role: Efficient 1.2V supply enabling >3-month operation on 200mAh battery; EN pin synchronized to MCU sleep/wake cycles. Use Value: 30μA quiescent current minimizes standby drain; hiccup-mode SCP prevents thermal runaway during sensor fault conditions; small size fits constrained wearables. | Use Scenario: Generating 1.2V auxiliary rail for FPGA I/O banks or DDR memory termination in space-constrained embedded controllers. IC Role / Device Role / Timing Role: Compact, fixed-output DC/DC converter replacing linear regulators to reduce heat and improve efficiency. Use Value: 87% peak efficiency at 1A (VIN=3.6V) cuts thermal load; PG signal validates rail stability before FPGA configuration; SOT563 simplifies automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.2V, 1A, 2.05MHz, 17μA IQ, WSON-6 (2mm×2mm) | Higher switching frequency enables smaller inductors but increases EMI risk; no output discharge. | Select when board space permits larger package and higher-frequency design; avoid if output discharge or thermal robustness is required. |
| RT7290AZSP | Fixed 1.2V, 1A, 1.5MHz, 35μA IQ, TSOT23-6 (2.9mm×1.6mm) | Larger footprint than SOT563; lacks PG output and has wider output tolerance (±2%). | Choose for cost-sensitive designs where PG monitoring and ±1% accuracy are non-critical; verify thermal performance at full load. |
Compared with TPS62231DRYR and RT7290AZSP, MP2151GTF-12-Z offers superior thermal performance in ultra-small SOT563, guaranteed output discharge, and tighter 1.2V regulation - making it optimal for space- and reliability-constrained portable electronics.
Availability
MP2151GTF-12-Z is available at Aetrix Electronics and suitable for wireless networking cards, portable instruments, and battery-powered medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2151GTF-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, low-quiescent-current DC/DC conversion for battery-powered and space-constrained applications - emphasizing integration, thermal resilience, and ease of use in portable electronics.
FAQ
What is the purpose of the PG pin on MP2151GTF-12-Z?
The PG (Power Good) pin is an open-drain output that signals when the 1.2V output is within ±5% of regulation (1.14V–1.26V). It requires an external 100–500kΩ pull-up resistor to VIN and asserts high after a 150μs delay once valid regulation is achieved - used for system power sequencing and fault detection.
Does MP2151GTF-12-Z require external feedback resistors?
No. MP2151GTF-12-Z is a fixed-output variant with internal feedback network set to 1.2V. Unlike adjustable versions (e.g., MP2151GTF), it omits FB pin functionality and replaces it with PG - eliminating resistor selection, placement, and tolerance errors in production.
How does output discharge work when EN is pulled low?
When EN is deasserted, an internal 200Ω MOSFET connects OUT to GND, discharging output capacitance. This occurs automatically without external circuitry and completes within ~10ms for a 22μF capacitor - preventing back-powering of upstream circuits or latch-up during power-down sequences.
What thermal derating applies to MP2151GTF-12-Z in SOT563 package?
In SOT563 on a 2-layer 63mm×63mm PCB, θJA is 80°C/W. At 25°C ambient, maximum continuous power dissipation is 1.5W. At 1A output and 3.6V input, typical power loss is ~180mW - resulting in ~14°C junction rise, well below the 125°C max operating temperature.
Can MP2151GTF-12-Z operate with input voltage below 2.5V?
No. The absolute minimum operating input is 2.5V per datasheet specifications. Below this, UVLO disables the device. The under-voltage lockout rising threshold is 2.45V typical with 200mV hysteresis - ensuring reliable startup only within the rated 2.5V–5.5V range.
Is the SOT563 package lead-free and RoHS compliant?
Yes. MP2151GTF-12-Z uses lead-free matte tin plating and complies with EU RoHS Directive 2011/65/EU and China RoHS. All MPS parts are also halogen-free and meet JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30°C/85% RH.
What is the minimum off-time specification and why does it matter?
The minimum off-time is 100ns. This parameter prevents inductor current runaway during large load transients by enforcing a lower bound on switching period - ensuring stable operation even at high duty cycles (e.g., VIN=2.7V, VOUT=1.2V) and supporting reliable DCM-to-CCM transition.
MP2151GTF-12-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- SOT-563, SOT-666
- 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:
- SOT-563
MP2151GTF-12-Z FAQ
1.How can I place an order for MP2151GTF-12-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2151GTF-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 MP2151GTF-12-Z reliable?
The price and inventory of MP2151GTF-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 MP2151GTF-12-Z is usually 5 days.
3.What payment methods are accepted for MP2151GTF-12-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2151GTF-12-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2151GTF-12-Z?
MP2151GTF-12-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2151GTF-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 MP2151GTF-12-Z?
For technical support, including MP2151GTF-12-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2151GTF-12-Z requirements.
6.How does Aetrix verify that MP2151GTF-12-Z is sourced from the original manufacturer or authorized distributors?
All MP2151GTF-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 MP2151GTF-12-Z meets industry standards.
7.What is the process for return or replacement of MP2151GTF-12-Z?
All MP2151GTF-12-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2151GTF-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 MP2151GTF-12-Z part is unused and in its original packaging.
Return procedure for MP2151GTF-12-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2151GTF-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…
