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Monolithic Power Systems Inc. MP2182CGTL-Z
- Part No.:
- MP2182CGTL-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-583
- Datasheet:
-
MP2182CGTL-Z.pdf
- Description:
- IC REG BUCK ADJ 2A SOT583
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MP2182CGTL-Z from Monolithic Power Systems is a monolithic synchronous step-down DC/DC converter with integrated 80mΩ high-side P-channel and 40mΩ low-side N-channel MOSFETs, delivering up to 2A continuous output current from a 2.5V–5.5V input while regulating output down to 0.6V. It employs constant-on-time (COT) control for fast transient response and includes power good (PG), external soft-start (SS), and hiccup-mode short-circuit protection - deployed in portable instrumentation and battery-powered I/O subsystems.
For engineers reviewing the MP2182CGTL-Z datasheet, MP2182CGTL-Z pinout, MP2182CGTL-Z application, or MP2182CGTL-Z equivalent, key selection criteria include its 1.2MHz switching frequency, 21μA quiescent current, 1% FB voltage accuracy, 80/40mΩ internal MOSFET RDS(on), and SOT583 package footprint compatibility with space-constrained mobile power rails.
Technical Context
The MP2182CGTL-Z uses constant-on-time (COT) control with input-voltage feedforward to maintain stable 1.2MHz switching across its 2.5V–5.5V input range and supports both CCM and DCM operation via AAM (Advanced Asynchronous Modulation) and ZCD (Zero-Current Detection). Its sleep mode reduces quiescent current to 21μA under light load by dynamically scaling bias currents and extending off-time beyond 3.5μs.
Protection architecture includes cycle-by-cycle peak current limiting (3.5A high-side), valley current limiting (2A low-side), VO overvoltage protection (115% VFB threshold), thermal shutdown at 160°C with 30°C hysteresis, and output discharge via internal 150Ω switch when EN is deasserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without pre-regulation. |
| Output Current | 2A continuous - sufficient for powering DSP cores, RF transceivers, or multi-rail FPGA I/O banks. |
| Switching Frequency | 1.2MHz - enables use of compact 1μH shielded inductors and minimizes EMI filtering requirements. |
| Feedback Accuracy | ±1% at 25°C - ensures tight regulation for sensitive analog or mixed-signal loads requiring stable 0.6–3.3V supplies. |
| Quiescent Current | 21μA - extends battery life in always-on sensor nodes or standby modes of portable devices. |
| MOSFET RDS(on) | 80mΩ (HS) / 40mΩ (LS) - reduces conduction loss and improves full-load efficiency above 90% at 1.2V/2A. |
| Power Good Threshold | 90% VFB rising / 85% VFB falling - provides clean, glitch-free sequencing signal for downstream logic or processors. |
Pinout & Package
SOT583 is an ultra-small, 8-pin, 1.6mm × 2.1mm, 0.5mm pitch thermally enhanced package with exposed pad for improved heat dissipation in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PG | Open-drain power good indicator | Signals valid regulation (VFB ≥ 90% target); requires external 100kΩ–500kΩ pull-up to VOUT or VIN. |
| 2 - VIN | Main input supply | Accepts 2.5V–5.5V unregulated input; decoupling capacitor must be placed adjacent to minimize high-frequency noise coupling. |
| 3 - SW | Switching node | Drain of internal high-side P-MOSFET; connects directly to inductor; critical for EMI and layout integrity. |
| 4 - GND | Power and signal ground | Common reference for all circuits; must be tied to thermal pad and low-impedance ground plane. |
| 5 - EN | Enable control | Active-high logic input (1.2V threshold); internal 2MΩ pulldown allows floating-disable; controls output discharge on disable. |
| 6 - SS | Soft-start timing | Connects to external capacitor (e.g., 2.2nF) to set controlled VOUT ramp rate and prevent inrush current. |
| 7 - OUT | Output power rail & sense | Delivers regulated output; also serves as current-sense point for internal discharge path and OVP monitoring. |
| 8 - FB | Feedback voltage input | Monitors resistor divider output; sets VOUT = 0.6V × (1 + R1/R2); 600mV nominal reference with ±1% tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-On-Time (COT) Control | Enables <10μs load transient recovery without external compensation components - simplifies design for dynamic loads like RF PA bursts. |
| External Soft-Start (SS) | Capacitor-programmable start-up slew rate prevents overshoot and inrush into large output capacitors (e.g., >22μF). |
| Output Discharge | Internal 150Ω discharge path activates automatically on EN deassertion - eliminates need for external bleed resistor in battery-backed systems. |
| Hiccup-Mode Short-Circuit Protection | Shuts down, discharges SS capacitor, then retries soft-start - protects against sustained shorts without thermal runaway or latch-up. |
| 100% Duty Cycle Capability | Allows dropout operation (e.g., VIN = 3.3V → VOUT = 3.0V) with minimal voltage drop - useful for post-regulation in low-noise analog supplies. |
Applications
| Wireless Networking Cards | Portable Instrumentation |
|---|---|
|
Use Scenario: Powering 2.4GHz/5GHz Wi-Fi/BT SoCs and RF front-end modules in mini-PCIe or M.2 form factor cards. IC Role / Device Role / Timing Role: Primary buck regulator supplying core voltage (1.1V/1.2V) and I/O rail (1.8V/3.3V) with fast load-step response to handle burst transmission. Use Value: 1.2MHz switching enables small 1μH inductors and avoids interference with 2.4GHz ISM band; PG signal synchronizes MAC layer wake-up. |
Use Scenario: Providing stable, low-noise supply to precision ADCs, DACs, and microcontroller peripherals in handheld multimeters or data loggers. IC Role / Device Role / Timing Role: Low-IQ (21μA) buck converter for main system rail, supporting deep-sleep modes while maintaining regulation during sensor sampling intervals. Use Value: 1% FB accuracy ensures <±12mV error on 1.2V rail; output discharge clears residual charge before MCU reset, preventing brown-out lockup. |
| Battery-Powered IoT Sensors | Low-Voltage I/O System Power |
|
Use Scenario: Regulating Li-ion (3.0–4.2V) or coin-cell (2.5–3.6V) sources to 1.8V/3.3V for BLE/Wi-Fi MCUs and environmental sensors. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating across full battery discharge curve, entering sleep mode below 10mA load. Use Value: 21μA IQ extends shelf life in storage; AAM+ZCD ensures DCM operation at light load for predictable efficiency down to 100μA. |
Use Scenario: Generating clean 1.2V/1.8V supplies for FPGA I/O banks, memory interfaces (LPDDR), or ASIC auxiliary rails in compact embedded controllers. IC Role / Device Role / Timing Role: Compact SOT583 buck delivering 2A with minimal board area; PG signal coordinates power-up sequence with FPGA configuration logic. Use Value: 80/40mΩ RDS(on) limits thermal rise in confined spaces; 100% duty cycle supports "pass-through" mode during brown-in 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 |
|---|---|---|---|
| TPS62865RRLR | Higher 3A rating, 2.5V–5.5V input, but 2.4MHz fSW and no PG pin; 0.6V min VOUT; 17μA IQ. | Lacks power-good signaling - unsuitable where sequenced enable/disable is required for system-level reliability. | Select when higher current headroom is needed and PG is not required; verify layout compatibility with 1.2mm × 0.8mm DSG package. |
| RT7297BGS | 2A, 2.5V–5.5V, 1.4MHz fSW, includes PG and SS, but 35μA IQ and no output discharge; 105mΩ/65mΩ RDS(on). | Higher RDS(on) increases conduction loss at 2A; absence of discharge path may require external circuitry for safe shutdown. | Prefer when cost sensitivity outweighs efficiency and safety features; confirm thermal performance with θJA = 130°C/W in same PCB stackup. |
Compared with MP2182CGTL-Z, TPS62865RRLR offers higher current and lower IQ but omits PG and output discharge - limiting use in sequenced or fail-safe systems; RT7297BGS matches PG/SS functionality but trades efficiency and safety for lower BOM cost.
Availability
MP2182CGTL-Z is available at Aetrix Electronics and suitable for wireless networking cards, portable instrumentation, and battery-powered IoT sensors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP2182CGTL-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, with a focus on integration, efficiency, and miniaturization for portable and industrial applications.
The MP2182 belongs to MPS's high-density DC/DC converter product line, designed specifically for space-constrained, battery-operated systems requiring low quiescent current, fast transient response, and robust fault protection.
FAQ
What is the minimum output voltage supported by the MP2182CGTL-Z?
The MP2182CGTL-Z supports output voltages as low as 0.6V, set by the internal 600mV feedback reference and external resistor divider. This enables direct regulation for modern low-voltage processor cores and I/O standards such as LPDDR4 and ARM Cortex-A series.
Does the MP2182CGTL-Z require external compensation components?
No - the MP2182CGTL-Z uses constant-on-time (COT) control with built-in input-voltage feedforward, eliminating the need for external loop compensation components like type-II or type-III networks. Stability is inherently maintained across input and load variations.
How does the output discharge function operate during shutdown?
When EN is pulled low, the MP2182CGTL-Z activates an internal 150Ω discharge path between OUT and GND, actively bleeding stored energy from the output capacitor. This prevents residual voltage from interfering with downstream logic reset sequences or causing latch-up.
What thermal performance can be expected in a standard 2-layer PCB layout?
On a 2-layer JEDEC-standard EV2182-TL-00A board, the MP2182CGTL-Z exhibits θJA = 58°C/W. At 2A load and 5V input, junction temperature rise is approximately 68°C above ambient - well within the 125°C max operating limit if board copper area and airflow are adequate.
Can the MP2182CGTL-Z operate with 100% duty cycle, and under what conditions?
Yes - the MP2182CGTL-Z supports 100% duty cycle operation when VOUT ≥ 0.9 × VIN, enabling dropout-like behavior. This occurs naturally during low-differential scenarios (e.g., 3.3V input → 3.0V output) and maintains regulation without switching, reducing noise and improving efficiency.
Is the PG pin open-drain, and what pull-up value is recommended?
Yes, PG is an open-drain output requiring an external pull-up resistor. A value between 100kΩ and 500kΩ to VOUT or VIN is recommended - 220kΩ is typical - to ensure clean logic transitions while minimizing standby current draw.
What failure protections are implemented beyond over-current and thermal shutdown?
In addition to cycle-by-cycle current limiting and thermal shutdown, the MP2182CGTL-Z includes input UVLO (2.45V rising threshold), output overvoltage protection (115% VFB trigger), absolute VIN OVP (6.1V), and hiccup-mode recovery during sustained short circuits - providing comprehensive system-level fault coverage.
MP2182CGTL-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-583
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
MP2182CGTL-Z FAQ
1.How can I place an order for MP2182CGTL-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2182CGTL-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 MP2182CGTL-Z reliable?
The price and inventory of MP2182CGTL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2182CGTL-Z is usually 5 days.
3.What payment methods are accepted for MP2182CGTL-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2182CGTL-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2182CGTL-Z?
MP2182CGTL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2182CGTL-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 MP2182CGTL-Z?
For technical support, including MP2182CGTL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2182CGTL-Z requirements.
6.How does Aetrix verify that MP2182CGTL-Z is sourced from the original manufacturer or authorized distributors?
All MP2182CGTL-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 MP2182CGTL-Z meets industry standards.
7.What is the process for return or replacement of MP2182CGTL-Z?
All MP2182CGTL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2182CGTL-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 MP2182CGTL-Z part is unused and in its original packaging.
Return procedure for MP2182CGTL-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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