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Monolithic Power Systems Inc. MP3212DQ-LF-Z
- Part No.:
- MP3212DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP3212DQ-LF-Z.pdf
- Description:
- IC REG BOOST ADJ 1.3A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,240
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Product details
Overview
MP3212DQ-LF-Z from Monolithic Power Systems is a 1.3A, 1MHz fixed-frequency current-mode boost regulator with integrated input disconnect switch, internal soft-start and compensation, operating from 2.3V–5.5V input to deliver up to 28V at 100mA for RF amplifier power supplies in GSM/GPRS/WiMAX systems.
For engineers reviewing the MP3212DQ-LF-Z datasheet, MP3212DQ-LF-Z pinout, MP3212DQ-LF-Z application, or MP3212DQ-LF-Z equivalent, key selection factors include its 1.3A switch current limit, 0.2Ω input disconnect RDS(on), automatic PFM mode at light load, 1.23V FB reference, and thermal shutdown with 25°C hysteresis.
Technical Context
The MP3212DQ-LF-Z implements peak-current-mode control with a 1MHz fixed switching frequency and stabilizing ramp to suppress subharmonic oscillation above 50% duty cycle. Its dual-switch architecture integrates both a main power MOSFET (RDS(on) = 0.4Ω) and an input isolation FET (RDS(on) = 0.2Ω).
Fault protection includes cycle-by-cycle current limiting on the SW node, average-current monitoring on the VDDOUT path, UVLO (2.3V rising threshold), overvoltage lockout (31–34V), and thermal shutdown at 150°C with 25°C hysteresis - all triggering controlled restart sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports single-cell Li-ion, NiMH, and USB-powered systems without external LDO pre-regulation. |
| Output Voltage | Up to 28V - programmable via resistive divider; enables direct powering of RF power amplifiers requiring >12V rails. |
| Switch Current Limit | 1.3A typical - sets maximum inductor peak current and defines safe operating area under transient overload. |
| VDDOUT Disconnect RDS(on) | 0.2Ω - ensures minimal voltage drop and power loss during active operation while enabling true input-output isolation in shutdown. |
| Feedback Reference | 1.23V ±3% - high-accuracy bandgap reference enabling precise output regulation across temperature and line variations. |
| Switching Frequency | 1MHz ±15% - allows use of compact 10µH inductors and 3.3µF ceramic output capacitors for space-constrained PCB layouts. |
| Efficiency | Up to 88% - achieved at mid-load conditions (e.g., 3.3V→18V @ 50mA), reducing thermal stress in sealed enclosures. |
Pinout & Package
MP3212DQ-LF-Z is housed in a thermally enhanced 10-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; PGND and AGND are separate but require low-impedance connection to common ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | Primary return path for output capacitor and internal power switch; must be connected directly to thermal pad and low-impedance ground plane. |
| 2 VDDOUT | Isolated Input Node | Voltage at input side of disconnect FET; used to sense inrush current and enable average-current monitoring for overload protection. |
| 3 VDD | Main Input Supply | Direct connection to battery or source; powers internal circuitry and feeds VDDOUT through disconnect FET when enabled. |
| 4 NC | No Connect | Unbonded pad - must remain floating; no trace or copper should connect to this pin. |
| 5 FB | Feedback Input | High-impedance node sensing output divider ratio; requires short, shielded routing to minimize noise-induced regulation error. |
| 6 NC | No Connect | Unbonded pad - must remain floating; no trace or copper should connect to this pin. |
| 7 AGND | Analog Ground | Reference for error amplifier and feedback circuitry; tied to PGND at single point near IC to avoid noise coupling. |
| 8 SHDN | Shutdown Control | Active-high logic input; pulls internal disconnect FET and power switch open when high, achieving zero current shutdown mode. |
| 9 VOUT | Regulated Output | High-voltage output node; connects to output capacitor and load; requires low-ESR ceramic capacitor placed adjacent to pin. |
| 10 SW | Switch Node | Drain of internal N-channel MOSFET; carries high di/dt switching current - demands shortest possible loop with inductor and diode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Input Disconnect Switch | 0.2Ω RDS(on) enables true input-output isolation in shutdown, preventing battery drain in always-on RF modules. |
| Automatic PFM Mode at Light Load | Reduces quiescent current to 180µA while maintaining regulation - extends battery life in intermittent-transmit applications. |
| Inrush Current Limiting | Internal 120mA current source at VDDOUT during startup limits surge into output capacitor, eliminating need for external inrush circuits. |
| Internal Compensation | Eliminates external compensation network - reduces BOM count and layout sensitivity while ensuring stability with standard 10µH/3.3µF design. |
| Dual Overcurrent Protection | Cycle-by-cycle limit on SW pin + average-current monitoring on VDDOUT path prevents damage during sustained output overload or short-circuit events. |
Applications
| GSM RF Power Amplifier Supply | WiMAX Transmitter Bias Rail |
|---|---|
|
Use Scenario: Providing stable 28V bias to Class AB RF power amplifiers in mobile handsets operating on GSM 900/1800 bands. IC Role / Device Role / Timing Role: Step-up regulator with input disconnect ensures clean power-up sequencing and zero standby current when transmitter is idle. Use Value: 88% efficiency at 100mA load minimizes thermal impact on adjacent baseband ICs; 1MHz switching avoids interference with IF frequencies. |
Use Scenario: Generating 24V–28V supply for WiMAX OFDM power amplifiers in customer premise equipment (CPE) with battery backup. IC Role / Device Role / Timing Role: Boost converter with thermal shutdown and overvoltage protection maintains safe operation during outdoor temperature extremes and AC brownouts. Use Value: 150°C thermal shutdown with 25°C hysteresis prevents latch-up during ambient spikes; 34V OVP protects PA transistors from overvoltage stress. |
| GPRS Modem Transmit Stage | Portable Medical Sensor Excitation |
|
Use Scenario: Delivering regulated 18V rail to GPRS Class 10 transmit power amplifier in asset trackers powered by 3.7V Li-ion cells. IC Role / Device Role / Timing Role: High-efficiency boost regulator with soft-start prevents input voltage sag during burst transmission events. Use Value: Internal soft-start limits inrush to 120mA, avoiding brownout of microcontroller; 1.3A switch limit supports 2W PA peak power. |
Use Scenario: Generating precise 12V excitation voltage for piezoresistive pressure sensors in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-noise step-up regulator with isolated input ensures sensor signal integrity and eliminates ground-loop interference. Use Value: Separate AGND and PGND pins reduce noise coupling into analog front-end; 0.1% line regulation maintains sensor accuracy across battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator with input disconnect applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 2.2A switch current, no integrated input disconnect switch; requires external MOSFET for isolation. | Lacks built-in VDDOUT current monitoring and zero-current shutdown - unsuitable for battery-sensitive always-on RF modules. | Select when higher output current (>150mA) is required and external isolation can be accommodated in layout. |
| LT3467EDD | Lower 1.1A switch current, 1.2MHz switching, no VDDOUT average-current monitoring or inrush limiting. | Does not support automatic PFM mode; quiescent current remains at 400µA in light-load PWM, reducing battery runtime. | Choose for cost-sensitive designs where 1.1A limit suffices and thermal shutdown hysteresis is non-critical. |
Compared with TPS61088RHLR and LT3467EDD, MP3212DQ-LF-Z uniquely integrates input disconnect with 0.2Ω RDS(on), inrush current limiting, and dual overcurrent protection - making it optimal for battery-powered RF transmitters requiring zero-quiescent isolation and robust fault recovery.
Availability
MP3212DQ-LF-Z is available at Aetrix Electronics and suitable for GSM RF amplifier supplies, WiMAX transmitter bias rails, GPRS modem transmit stages, and portable medical sensor excitation requiring stable component supply across industrial temperature ranges.
Supply support for MP3212DQ-LF-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 design centers in the US, China, and Taiwan.
The MP3212 belongs to MPS's high-efficiency DC/DC boost converter product line, engineered specifically for battery-powered RF systems requiring integrated input isolation, low-noise operation, and robust fault protection.
FAQ
What is the maximum output voltage achievable with MP3212DQ-LF-Z?
The MP3212DQ-LF-Z supports up to 28V output voltage, limited by its internal overvoltage protection threshold of 31–34V and maximum duty cycle of 90%. This is confirmed in the Recommended Operating Conditions table and validated by typical application circuits delivering 28V at 100mA load with 3.3V input.
Does MP3212DQ-LF-Z require external compensation components?
No. The MP3212DQ-LF-Z features fully internal compensation, eliminating the need for external RC networks. This is explicitly stated in the FEATURES section and verified in the APPLICATION INFORMATION section, which confirms stable operation with only R1/R2 feedback resistors, 10µH inductor, and 3.3µF ceramic output capacitor.
How does the input disconnect function behave during shutdown?
When SHDN is pulled high, the internal VDDOUT FET opens completely, isolating the input source from the output stage. Shutdown current drops to 1µA, and the device enters zero-current shutdown mode - verified by Electrical Characteristics table entry IQ,SHDN = 1µA and block diagram showing independent control of VDDOUT and SW switches.
What is the purpose of the VDDOUT pin, and how does it differ from VDD?
VDDOUT is the voltage node downstream of the integrated input disconnect FET, used for inrush current sensing and average-current monitoring. VDD is the raw input supply upstream of the FET. This separation enables independent control and protection of the input path - confirmed in PIN FUNCTIONS table and OPERATION section describing VDDOUT current source behavior during startup.
Can MP3212DQ-LF-Z operate with a 2.3V input at –40°C?
No. While the absolute minimum input voltage is specified as 2.3V, Note 1 in the Recommended Operating Conditions states that "Minimum supply operating voltage needs to be above 2.5V at –40°C." Therefore, reliable operation at –40°C requires VIN ≥ 2.5V, as confirmed in the datasheet's temperature derating guidance.
What thermal performance can be expected in a 4-layer PCB layout?
On a JESD51-7 compliant 4-layer PCB, the MP3212DQ-LF-Z exhibits θJA = 50°C/W and θJC = 12°C/W. With 2.5W maximum continuous power dissipation at +25°C ambient, junction temperature rise is calculated as (TJ(MAX) – TA)/θJA = (150 – 25)/50 = 2.5W - matching the Absolute Maximum Ratings table value.
Is the FB pin internally biased, and what is its input current range?
Yes. The FB pin has an internal 1.23V reference and draws ±0.1µA bias current, as specified in the Electrical Characteristics table under "FB Input Bias Current IFB." This low bias current enables use of high-value feedback resistors without significant voltage division error.
MP3212DQ-LF-Z 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
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.3V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 1.3A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP3212DQ-LF-Z FAQ
1.How can I place an order for MP3212DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3212DQ-LF-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 MP3212DQ-LF-Z reliable?
The price and inventory of MP3212DQ-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3212DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP3212DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3212DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3212DQ-LF-Z?
MP3212DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3212DQ-LF-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 MP3212DQ-LF-Z?
For technical support, including MP3212DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3212DQ-LF-Z requirements.
6.How does Aetrix verify that MP3212DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP3212DQ-LF-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 MP3212DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP3212DQ-LF-Z?
All MP3212DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3212DQ-LF-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 MP3212DQ-LF-Z part is unused and in its original packaging.
Return procedure for MP3212DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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