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Monolithic Power Systems Inc. MPQ2122GJ-Z
- Part No.:
- MPQ2122GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ2122GJ-Z.pdf
- Description:
- IC REG BUCK ADJ 2A DL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,848
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Product details
Overview
MPQ2122GJ-Z from Monolithic Power Systems is a dual-channel, synchronous step-down DC/DC regulator with integrated 80mΩ high-side and 35mΩ low-side MOSFETs per channel, operating from 2.7V–6V input to deliver two independent 2A outputs down to 0.608V. It features 1MHz fixed-frequency PWM control, 180° phase-shifted operation, 45µA quiescent current, and cycle-by-cycle over-current protection - optimized for single-cell Li+-powered portable electronics.
For engineers reviewing the MPQ2122GJ-Z datasheet, MPQ2122GJ-Z pinout, MPQ2122GJ-Z application, or MPQ2122GJ-Z equivalent, key selection criteria include dual-output synchronization capability, TSOT23-8 thermal performance (θJA = 100°C/W), light-load DCM mode efficiency (>80%), hiccup-mode short-circuit recovery, and FB voltage accuracy (±1.2% at 0.608V).
Technical Context
The MPQ2122GJ-Z implements peak-current-mode control with internal compensation and dual independent PWM channels sharing a master 1MHz oscillator with 180° phase shift to minimize input ripple. Each channel includes dedicated EN, FB, and SW pins, enabling independent enable/disable and output voltage programming.
It supports three operational modes: continuous conduction mode (CCM) at full load, discontinuous conduction mode (DCM) at light load for >80% efficiency, and fixed-off-time mode during low-dropout conditions. Thermal shutdown activates at 160°C with 30°C hysteresis, and short-circuit detection triggers hiccup mode after 400µs of sustained current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 6V - supports single-cell Li+ (3.0–4.2V) and USB-powered systems without external LDO pre-regulation. |
| Output Voltage Range | 0.608V to VIN - enables core logic (e.g., 0.9V CPU I/O) and analog rails (1.2V, 1.8V, 2.5V, 3.3V) via resistor divider. |
| Max Output Current | 2A per channel - sufficient for dual-core SoC power domains or parallel sensor/RF subsystems. |
| Quiescent Current | 45µA typical - extends battery runtime in always-on standby states (e.g., Bluetooth LE beacon wake-up). |
| Switching Frequency | 1MHz fixed (CCM), ±20% variation - allows compact 1.5–2.2µH inductors and 22µF ceramic output capacitors. |
| FB Voltage Accuracy | 0.608V ±1.2% (–40°C to +125°C) - ensures <±15mV regulation error across temperature for precision analog supplies. |
| Thermal Shutdown | 160°C activation with 30°C hysteresis - prevents permanent damage during transient overload or poor PCB heatsinking. |
Pinout & Package
MPQ2122GJ-Z is housed in an 8-pin TSOT23-8 package with exposed thermal pad (GND-connected), optimized for high-density portable PCB layouts and thermal dissipation via top-layer GND plane and thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB2 | Channel 2 feedback input | Connects to resistor divider tap; sets VOUT2 with 0.608V reference - determines output accuracy and loop stability. |
| 2 EN2 | Channel 2 enable input | Active-high logic control; pulls below 0.4V to disable CH2 - enables independent power sequencing for subsystems. |
| 3 SW2 | Channel 2 switch node | Connects to inductor and internal HS/LD MOSFETs - high di/dt path requiring short, wide trace and local ceramic decoupling. |
| 4 EN1 | Channel 1 enable input | Active-high logic control; independent of EN2 - supports staggered startup or fault-isolated shutdown. |
| 5 GND | Power and signal ground | Common return for both channels and thermal pad - must connect to large top-layer GND plane with ≥4 thermal vias. |
| 6 SW1 | Channel 1 switch node | Connects to inductor and internal HS/LD MOSFETs - electrically isolated from SW2 to prevent cross-talk in phase-shifted operation. |
| 7 IN | Main input supply | Accepts 2.7–6V; requires low-ESR ceramic capacitor (≥22µF) placed within 2mm of pin to suppress switching noise. |
| 8 FB1 | Channel 1 feedback input | Connects to resistor divider tap; sets VOUT1 independently - enables dual-rail generation from single input source. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous buck channels | Integrated 80mΩ P-ch HS and 35mΩ N-ch LD MOSFETs eliminate external Schottky diodes and reduce BOM count by 4 components per channel. |
| 180° phase-shifted operation | Reduces RMS input current ripple by ~30%, allowing smaller input capacitors (e.g., single 22µF X5R instead of two 10µF). |
| Light-load DCM mode | Maintains >80% efficiency at 10mA load - critical for IoT sensors in sleep mode where average current is sub-mA. |
| Hiccup-mode short-circuit protection | Disables output, discharges soft-start cap, then retries - prevents thermal runaway during sustained shorts (e.g., PCB solder bridge). |
| Internal 0.5ms soft-start | Controls output ramp rate to avoid inrush current and overshoot - eliminates need for external soft-start RC networks. |
Applications
| Smartphone Application Processor Core | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: Dual-rail power for application processor (1.1V core, 0.9V GPU) and memory interface (1.2V LPDDR). IC Role / Device Role / Timing Role: Primary dual-output PMIC delivering regulated, phase-shifted supplies with independent enable control for dynamic voltage scaling. Use Value: 180° phase shift cuts input capacitor size by 30%; 45µA IQ extends standby time beyond 72 hours on 2000mAh battery. |
Use Scenario: Powering ECG front-end amplifier (3.3V), microcontroller (1.8V), and BLE radio (1.2V) in handheld diagnostic device. IC Role / Device Role / Timing Role: Single-chip dual-buck solution replacing discrete regulators to meet IEC 60601 leakage and size constraints. Use Value: Integrated MOSFETs and DCM mode achieve >85% efficiency at 5mA sensor bias current, minimizing self-heating in sealed enclosure. |
| Industrial Handheld Scanner | Wearable Fitness Tracker |
|
Use Scenario: Simultaneous powering of laser driver (5V), image sensor (2.8V), and MCU (1.8V) in barcode scanner with 200ms burst operation. IC Role / Device Role / Timing Role: High-efficiency dual buck with fast transient response to handle pulsed laser load spikes without output droop. Use Value: 1MHz switching and internal compensation ensure <10µs recovery from 1A step load; 100% duty cycle supports near-UVLO operation during battery sag. |
Use Scenario: Ultra-low-power wearable running accelerometer, optical heart-rate sensor, and BLE SoC on coin-cell or thin-film battery. IC Role / Device Role / Timing Role: Dual-output regulator enabling separate rail control for analog sensor bias (3.0V) and digital core (1.2V) with independent enable. Use Value: 45µA quiescent current and DCM mode extend battery life to >14 days; TSOT23-8 footprint fits <8mm² PCB area budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBT | Triple-output (3A/1.8A/1.8A), 2.5–5.5V input, 2.2MHz switching, no phase shift, higher IQ (100µA) | Supports triple-rail SoC power but lacks 180° phase shift - increases input ripple and capacitor stress in space-constrained designs. | Choose when third output is required and input capacitance headroom exists; avoid if minimizing input EMI is critical. |
| RTQ2132BGQW | Dual 3A output, 2.7–6V input, 500kHz–2.2MHz programmable frequency, 25µA IQ, no integrated phase control | Higher current per channel but requires external timing resistors and lacks default 180° sync - adds design complexity and layout risk. | Prefer for >2A loads or frequency tuning needs; MPQ2122GJ-Z offers simpler bring-up and guaranteed phase alignment. |
Compared with TPS65023BRSBT and RTQ2132BGQW, MPQ2122GJ-Z delivers optimal balance of ultra-low IQ, guaranteed 180° phase shift, and minimal external component count - making it superior for compact, battery-sensitive dual-rail systems where input ripple and standby power dominate design trade-offs.
Availability
MPQ2122GJ-Z is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, industrial handheld scanners, and wearable fitness trackers requiring stable component supply across production lifecycles.
Supply support for MPQ2122GJ-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 analog and power ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MPQ2122 belongs to MPS's MPQ automotive-grade and industrial-qualified buck regulator product line, designed specifically for space-constrained, battery-powered applications demanding high efficiency, low IQ, and robust fault protection.
FAQ
What is the minimum output voltage supported by MPQ2122GJ-Z?
The MPQ2122GJ-Z supports a minimum regulated output voltage of 0.608V, set by its internal feedback reference. This value is specified across –40°C to +125°C with ±1.2% tolerance, enabling precise low-voltage core rails for modern processors and FPGAs without external reference trimming.
Does MPQ2122GJ-Z require external compensation components?
No - the MPQ2122GJ-Z uses internally compensated peak-current-mode control, eliminating the need for external Type-II or Type-III compensation networks. Stability is ensured with standard 1.5–2.2µH inductors and 22µF ceramic output capacitors, simplifying layout and reducing bill-of-materials cost.
How does the 180° phase shift improve system-level performance?
The 180° phase shift between channels reduces input current ripple amplitude by ~30% compared to in-phase operation, lowering RMS input capacitor stress and permitting smaller, lower-cost ceramic input capacitors - critical for maintaining low-profile, high-density portable PCBs.
Can MPQ2122GJ-Z operate with only one channel enabled?
Yes - EN1 and EN2 are independent logic inputs. Either channel can be disabled while the other remains active, supporting flexible power sequencing, subsystem isolation, or dynamic rail shutdown during low-power states without affecting the enabled channel's regulation or efficiency.
What thermal derating guidance applies to MPQ2122GJ-Z in TSOT23-8?
With θJA = 100°C/W on a standard 4-layer PCB, MPQ2122GJ-Z delivers full 2A per channel up to +65°C ambient. Above that, output current must be linearly derated to maintain TJ ≤ 125°C - e.g., 1.5A per channel at +85°C ambient - using the formula IOUT = 2A × (125 − TA)/60.
Is the MPQ2122GJ-Z RoHS and REACH compliant?
Yes - MPQ2122GJ-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. MPS confirms green status via its Quality Assurance portal, with material declarations available upon request.
MPQ2122GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.608V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MPQ2122GJ-Z FAQ
1.How can I place an order for MPQ2122GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2122GJ-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 MPQ2122GJ-Z reliable?
The price and inventory of MPQ2122GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2122GJ-Z is usually 5 days.
3.What payment methods are accepted for MPQ2122GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2122GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2122GJ-Z?
MPQ2122GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2122GJ-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 MPQ2122GJ-Z?
For technical support, including MPQ2122GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2122GJ-Z requirements.
6.How does Aetrix verify that MPQ2122GJ-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2122GJ-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 MPQ2122GJ-Z meets industry standards.
7.What is the process for return or replacement of MPQ2122GJ-Z?
All MPQ2122GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2122GJ-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 MPQ2122GJ-Z part is unused and in its original packaging.
Return procedure for MPQ2122GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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