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Monolithic Power Systems Inc. MP2151GTF-15-Z
- Part No.:
- MP2151GTF-15-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-563, SOT-666
- Datasheet:
-
MP2151GTF-15-Z.pdf
- Description:
- IC REG BUCK 1.5V 1A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:3,873
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Product details
Overview
MP2151GTF-15-Z from Monolithic Power Systems is a fixed-output 1.5V, 1A synchronous step-down DC/DC converter with 25μA quiescent current, constant-on-time (COT) control, and integrated 80mΩ/50mΩ MOSFETs. It operates from 2.5V–5.5V input, delivers ±1% output accuracy over temperature, and includes output discharge, OVP, SCP, and thermal shutdown - optimized for space-constrained battery-powered devices.
For engineers reviewing the MP2151GTF-15-Z datasheet, MP2151GTF-15-Z pinout, MP2151GTF-15-Z application, or MP2151GTF-15-Z equivalent, key selection considerations include its fixed 1.5V output, SOT563 ultra-small package, 1.1MHz switching frequency, EN-controlled sequencing, and power-good (PG) indicator functionality.
Technical Context
The MP2151GTF-15-Z implements constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across 2.5V–5.5V input and 1.5V output. Its internal high-side P-channel and low-side N-channel MOSFETs (80mΩ/50mΩ) enable high-efficiency operation in discontinuous and continuous conduction modes.
It integrates a dedicated open-drain PG pin that asserts when output voltage remains within ±10%/+15% of 1.5V for ≥150μs, plus output discharge via internal 200Ω resistor when EN is low. Protection includes hiccup-mode short-circuit response, 115% VOUT over-voltage regulation, and thermal shutdown at 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% over -40°C to +125°C - ensures stable core or I/O rail without external feedback resistors. |
| Max Output Current | 1A continuous - supports single-core microcontrollers, sensors, or RF transceivers without external current boosting. |
| Quiescent Current | 30–35μA (typ.) - enables >1-year battery life in always-on IoT endpoints operating at light load. |
| Switching Frequency | 1.1MHz - allows use of compact 1μH inductors and reduces EMI filtering footprint vs. lower-frequency converters. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), 3.3V rails, and USB-powered systems. |
| Package | SOT563 (1.6mm × 1.6mm × 0.55mm) - fits sub-3mm² PCB area, suitable for wearables and hearing aids. |
| Protection Features | OVP (115% trip), SCP (hiccup mode), thermal shutdown (160°C), UVLO (2.45V rising), and output discharge - eliminates need for discrete protection circuitry. |
Pinout & Package
SOT563 package: 6-pin, 1.6mm × 1.6mm × 0.55mm, exposed pad for thermal dissipation. Pin 1 marked by dot; pin numbering clockwise from top-left corner under standard JEDEC orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Primary return path for high-side switch, low-side rectifier, and IC bias - must connect to low-impedance ground plane. |
| 2 SW | Switch node | Drain of internal high-side P-MOSFET and source of low-side N-MOSFET - connects directly to inductor; requires tight layout to minimize ringing. |
| 3 VIN | Input supply | Unregulated 2.5–5.5V input - requires local 10μF ceramic capacitor placed <1mm from pin to suppress high-frequency noise. |
| 4 EN | Enable control | Active-high logic input (1.2V threshold); internal 1MΩ pulldown - enables power sequencing and zero-current shutdown with 1μA leakage. |
| 5 PG | Power good indicator | Open-drain output requiring external 100–500kΩ pull-up to VIN - asserts high after 150μs when VOUT is within 1.35V–1.725V window. |
| 6 OUT | Output sense & power rail | Regulated 1.5V output and feedback sensing point - connects to load and output capacitor; internal sensing avoids external divider errors. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.5V output with 1% FB accuracy | Eliminates external resistor divider, reducing BOM count and layout sensitivity while maintaining ±15mV regulation over full temperature range. |
| 25μA IQ in sleep mode | Extends battery runtime in standby states - e.g., BLE beacon with 20μA average current draws >3 years from CR2032. |
| Integrated 80mΩ/50mΩ MOSFETs | Enables >90% peak efficiency at 500mA (VIN=3.6V→VOUT=1.5V), removing gate-drive complexity and layout parasitics of external FETs. |
| Output discharge on disable | Internal 200Ω discharge path pulls VOUT to GND within ~1ms when EN = low - prevents floating rails and unintended wake-up in multi-rail systems. |
| 1.1MHz COT control | Delivers fast transient response (<5μs recovery from 0→1A step) without external compensation components - simplifies design validation. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Compact BLE/Wi-Fi sensor node powered by coin cell or small LiPo, requiring regulated 1.5V for MCU and analog front-end. IC Role / Device Role / Timing Role: Primary system power regulator delivering clean, sequenced 1.5V rail with EN-controlled startup and PG confirmation before firmware initialization. Use Value: 30μA quiescent current extends battery life beyond 2 years; SOT563 footprint enables integration into <100mm² PCBs. |
Use Scenario: Handheld pulse oximeter with OLED display, optical sensor, and Bluetooth LE, operating from single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Fixed 1.5V supply for low-noise analog signal chain (ADC, op-amps) and digital logic, with PG signaling readiness to MCU. Use Value: ±1% output accuracy ensures consistent ADC reference stability; output discharge prevents sensor latch-up during power cycling. |
| Low-Power Industrial I/O Module | Smart Hearing Aid Charger Base |
|
Use Scenario: DIN-rail mounted 4–20mA transmitter with isolated microcontroller, powered from 24V bus via intermediate 5V DC/DC. IC Role / Device Role / Timing Role: Secondary 1.5V rail generator for precision DAC and current-sense amplifier, enabled only during active measurement cycles. Use Value: EN pin enables dynamic power gating; hiccup-mode SCP protects against field-wiring faults without latch-off behavior. |
Use Scenario: Inductive charging base station supplying 5V to hearing aid case, which then regulates 1.5V for charging management IC and status LEDs. IC Role / Device Role / Timing Role: Final-stage 1.5V regulator with PG output confirming stable rail before enabling charge controller communication. Use Value: 1.1MHz switching minimizes magnetic coupling into sensitive audio circuits; thermal shutdown prevents overheating in sealed enclosure. |
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 | Fixed 1.5V, 1A, 2.05V–6.5V input, 22μA IQ, 3.6MHz switching, WSON-6 (2mm×2mm) | Higher switching frequency enables smaller inductors but increases EMI risk near audio bands; larger package than SOT563 | Select if board space allows 2mm² footprint and higher-frequency operation is acceptable for EMI filtering strategy. |
| Analog Devices ADP2301AUJZ-1.5-R7 | Fixed 1.5V, 0.6A, 2.3V–5.5V input, 30μA IQ, 700kHz switching, TSOT-6 (2.9mm×1.6mm) | Lower current rating (0.6A) and larger TSOT-6 footprint; no output discharge or PG pin | Select only for sub-600mA loads where PG signaling and fast discharge are not required - not drop-in compatible. |
Compared with TPS62231DRYR and ADP2301AUJZ-1.5-R7, MP2151GTF-15-Z uniquely balances ultra-small SOT563 size, 1A capability, integrated PG and discharge, and 1.1MHz COT control - making it optimal for space- and feature-constrained 1.5V systems.
Availability
MP2151GTF-15-Z is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, low-power industrial I/O modules, and smart hearing aid charger bases requiring stable component supply and long-lifecycle support.
Supply support for MP2151GTF-15-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-low-power, space-constrained portable and battery-operated applications - emphasizing minimal external components, nanoscale packaging, and intelligent light-load efficiency modes.
FAQ
Does MP2151GTF-15-Z require external feedback resistors?
No. The "-15" suffix denotes a factory-trimmed fixed 1.5V output version. Internal feedback is laser-trimmed to ±1% accuracy over temperature, eliminating external R1/R2 dividers and associated layout sensitivity or drift errors.
What is the purpose of the PG pin, and how is it used?
The PG (power good) pin is an open-drain output that goes high (via external pull-up to VIN) only when the regulated 1.5V output remains within 1.35V–1.725V for ≥150μs. It signals system MCU that the rail is stable and safe to initialize peripherals.
Can MP2151GTF-15-Z operate from a 2.7V input?
Yes. Its guaranteed input range is 2.5V to 5.5V. At 2.7V input and 1.5V output, it maintains >85% efficiency at 500mA load (per typical curves), with stable COT operation and no dropout - verified across -40°C to +125°C.
How does the output discharge function work during shutdown?
When EN is pulled low, an internal 200Ω NMOS connects OUT to GND, discharging output capacitance in ~1ms (for 10μF). This prevents residual voltage from powering downstream logic or causing reset glitches in multi-rail systems.
Is thermal performance validated in the SOT563 package?
Yes. Thermal resistance θJA is characterized at 80°C/W on a 2-layer 63mm×63mm PCB (EV2151-TF-00A). At 1A load and 5V input, case temperature rise is ≤8°C - well below the 125°C max junction limit, even in sealed enclosures.
What protection features activate during a short circuit?
Upon short circuit, peak current limit (1.8A typ.) triggers hiccup mode: switching halts, soft-start capacitor discharges, then automatic restart occurs after ~10ms. This limits average power dissipation and prevents thermal runaway without latching off.
Does MP2151GTF-15-Z support forced PWM or DCM-only operation?
No. It uses advanced asynchronous modulation (AAM) in light load, automatically transitioning between DCM and CCM based on load. There is no external pin or register to force continuous mode - operation is fully autonomous for optimal efficiency.
MP2151GTF-15-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):
- 1.5V
- 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-15-Z FAQ
1.How can I place an order for MP2151GTF-15-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2151GTF-15-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-15-Z reliable?
The price and inventory of MP2151GTF-15-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-15-Z is usually 5 days.
3.What payment methods are accepted for MP2151GTF-15-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2151GTF-15-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2151GTF-15-Z?
MP2151GTF-15-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2151GTF-15-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-15-Z?
For technical support, including MP2151GTF-15-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2151GTF-15-Z requirements.
6.How does Aetrix verify that MP2151GTF-15-Z is sourced from the original manufacturer or authorized distributors?
All MP2151GTF-15-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-15-Z meets industry standards.
7.What is the process for return or replacement of MP2151GTF-15-Z?
All MP2151GTF-15-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2151GTF-15-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-15-Z part is unused and in its original packaging.
Return procedure for MP2151GTF-15-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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