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Monolithic Power Systems Inc. MP2122AGJ-P
- Part No.:
- MP2122AGJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP2122AGJ-P.pdf
- Description:
- IC REG BCK ADJ 2A/2A DL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:419
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Product details
Overview
MP2122AGJ-P from Monolithic Power Systems is a dual-channel, synchronous buck regulator IC with integrated 80mΩ high-side and 35mΩ low-side MOSFETs, 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 hiccup-mode short-circuit protection-designed for space-constrained, battery-powered portable electronics.
For engineers reviewing the MP2122AGJ-P datasheet, MP2122AGJ-P pinout, MP2122AGJ-P application, or MP2122AGJ-P equivalent, this page delivers verified technical context, validated pin functions, real-world efficiency data at light and full load, thermal shutdown behavior, and confirmed alternative regulators for dual-output Li+-fed systems.
Technical Context
The MP2122AGJ-P implements peak-current mode control with internal compensation per channel, enabling fast transient response without external loop components. Its dual 1MHz oscillators are inherently phase-shifted by 180°, reducing input ripple and allowing smaller input capacitance.
Advanced light-load mode dynamically transitions each channel into discontinuous conduction mode (DCM) or fixed-off-time operation based on load and dropout conditions-verified across nine operational states in the datasheet. Thermal shutdown activates at 160°C with 30°C hysteresis, and cycle-by-cycle current limiting triggers at 3.5A typical per channel.
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 pre-regulation. |
| Output Current per Channel | 2A continuous - enables dual-core SoC or multi-rail sensor subsystems from one compact IC. |
| Quiescent Current | 45µA - extends battery runtime in standby modes of handheld devices and wearables. |
| Switching Frequency | 1MHz fixed - allows use of small 1.5µH inductors and 22µF ceramic output capacitors. |
| Feedback Reference Voltage | 0.608V ±12mV - enables precise low-voltage rail generation (e.g., 1.2V, 1.8V) with standard resistor dividers. |
| Thermal Shutdown Threshold | 160°C with 30°C hysteresis - provides robust overtemperature protection while avoiding nuisance shutdowns. |
| Phase Shift | 180° between channels - cuts input RMS current ripple by ~30%, relaxing input capacitor ESR requirements. |
Pinout & Package
MP2122AGJ-P is housed in an 8-pin TSOT23-8 package with exposed thermal pad (GND-connected), optimized for high-power density and thermal dissipation in portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB2 | Error amplifier input for Channel 2 | Connects to resistor divider tap to set VOUT2; 0.608V reference enables accurate regulation down to 0.608V. |
| 2 EN2 | Enable input for Channel 2 | Active-high logic; pulls below 0.4V to disable Channel 2 independently-supports dynamic power sequencing. |
| 3 SW2 | Channel 2 switch node | Connects directly to inductor L2; carries high di/dt switching current-requires short, low-inductance routing. |
| 4 EN1 | Enable input for Channel 1 | Active-high logic; independent control enables staggered startup or rail-specific power management. |
| 5 GND | Power and signal ground | Exposed thermal pad tied to PCB GND plane via multiple vias-critical for thermal performance and noise immunity. |
| 6 SW1 | Channel 1 switch node | Connects directly to inductor L1; 180° phase shift relative to SW2 reduces input ripple current magnitude. |
| 7 IN | Main input supply | Accepts 2.7–6V; requires local 22µF X5R/X7R ceramic decoupling placed adjacent to pin for EMI suppression. |
| 8 FB1 | Error amplifier input for Channel 1 | Setpoint for VOUT1; identical 0.608V reference as FB2-enables matched dual-rail accuracy with separate dividers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2A synchronous buck channels | Integrated 80mΩ HS-FET + 35mΩ LS-FET per channel eliminates external Schottky diodes and saves >3mm² board area. |
| 180° inter-channel phase shift | Reduces input capacitor RMS current by up to 30%, permitting smaller 22µF X7R ceramics instead of larger bulk electrolytics. |
| Advanced light-load mode | Automatically enters DCM or fixed-off-time operation per channel-maintains >80% efficiency at 1mA load. |
| 100% duty-cycle capability | Supports ultra-low dropout operation (e.g., VOUT = 3.3V from VIN = 3.6V), critical for Li+ end-of-discharge scenarios. |
| Hiccup-mode short-circuit protection | Disables output after 400µs overcurrent, discharges soft-start cap, then retries-prevents thermal runaway during sustained faults. |
Applications
| Smartphone Application | Portable Medical Instrument |
|---|---|
|
Use Scenario: Dual-rail power for application processor core (1.2V) and I/O (1.8V) in compact smartphone PMIC architecture. IC Role / Device Role / Timing Role: Primary dual-output DC/DC converter delivering regulated, phase-shifted 2A rails with <45µA quiescent draw in sleep mode. Use Value: Enables 12-hour standby on 2000mAh battery while maintaining fast transient response to CPU burst loads. |
Use Scenario: Powering precision analog front-end (1.8V) and digital controller (1.2V) in handheld blood glucose meter. IC Role / Device Role / Timing Role: Single-chip dual-buck solution replacing discrete regulators-reducing BOM count and layout complexity. Use Value: 0.608V feedback reference ensures stable 1.2V/1.8V rails across -40°C to +85°C, meeting medical-grade accuracy specs. |
| Wearable Fitness Tracker | Bluetooth Audio Earbud |
|
Use Scenario: Supplying sensor hub (1.8V) and BLE SoC (1.2V) from a 3.7V Li-ion cell in sub-10g wearable form factor. IC Role / Device Role / Timing Role: Low-IQ dual buck managing dynamic load shifts between motion sensing and wireless transmission phases. Use Value: 45µA IQ and DCM light-load mode extend battery life to 7 days between charges under typical usage. |
Use Scenario: Generating clean, low-noise 1.2V DSP core and 1.8V RF/analog rails in tightly packed earbud PCB. IC Role / Device Role / Timing Role: Phase-shifted dual buck minimizing input ripple-induced RF interference in sensitive 2.4GHz receiver path. Use Value: 180° phase alignment reduces conducted EMI at fundamental frequency, easing FCC/CE radiated emissions compliance. |
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 |
|---|---|---|---|
| RTQ2132B-QT | Higher 3A per channel, 2.5V–5.5V input, 25µA IQ, but no 180° phase shift or 100% duty cycle. | Preferred for higher-current industrial sensors; lacks phase-shift benefit for EMI-sensitive audio designs. | Select when >2A per rail is required and input range is narrower (2.5–5.5V). |
| TPS62150ARGTR | Single-channel 1.5A, 2.7–6V input, 17µA IQ, 2.25MHz switching-but no dual output or phase control. | Requires two ICs to match MP2122AGJ-P's dual-rail capability, increasing size and cost. | Choose only if single-rail simplicity and ultra-low IQ outweigh dual-rail integration needs. |
Compared with RTQ2132B-QT and TPS62150ARGTR, MP2122AGJ-P uniquely combines dual 2A outputs, 180° phase shift, 100% duty cycle, and 45µA IQ in a TSOT23-8 package-making it optimal for compact, battery-efficient dual-rail portable systems where EMI and footprint are critical.
Availability
MP2122AGJ-P is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, wearable fitness trackers, and Bluetooth audio earbuds requiring stable component supply and long-term production continuity.
Supply support for MP2122AGJ-P 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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2122A belongs to MPS's low-IQ dual buck regulator product line, engineered specifically for space- and energy-constrained portable electronics powered by single-cell lithium-ion batteries.
FAQ
What is the minimum output voltage supported by MP2122AGJ-P?
The MP2122AGJ-P supports output voltages as low as 0.608V, set by its internal feedback reference voltage. This value is specified with ±12mV tolerance over temperature and line, enabling precise generation of common low-voltage rails like 1.2V and 1.8V using standard resistor dividers.
Does MP2122AGJ-P require external compensation components?
No. The MP2122AGJ-P features fully internal compensation for both channels, eliminating the need for external Type-II or Type-III compensation networks. This simplifies design, reduces BOM count, and ensures stable operation with standard 1.5µH inductors and 22µF ceramic output capacitors.
How does the 180° phase shift improve system-level performance?
The 180° phase shift between SW1 and SW2 reduces input capacitor RMS current by approximately 30%, lowering heating and permitting smaller, lower-ESR ceramic input capacitors. This directly improves EMI profile and eases input filtering requirements in noise-sensitive applications like Bluetooth audio.
Can MP2122AGJ-P operate with only one channel enabled?
Yes. EN1 and EN2 are independent active-high enable inputs. Either channel can be disabled while the other remains fully operational-supporting flexible power sequencing, dynamic rail shutdown, or asymmetric load configurations without affecting regulation stability.
What thermal management practices are recommended for MP2122AGJ-P?
Mount the TSOT23-8 package with its exposed GND pad soldered to a dedicated PCB ground plane, connected via ≥4 thermal vias to inner-layer ground planes. This achieves the rated θJA of 100°C/W and prevents thermal shutdown under 2A continuous load at +70°C ambient.
Is MP2122AGJ-P RoHS-compliant and halogen-free?
Yes. MP2122AGJ-P is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status for this part on its official Quality Assurance webpage, including material declarations and test reports.
MP2122AGJ-P 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, 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
MP2122AGJ-P FAQ
1.How can I place an order for MP2122AGJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2122AGJ-P 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 MP2122AGJ-P reliable?
The price and inventory of MP2122AGJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2122AGJ-P is usually 5 days.
3.What payment methods are accepted for MP2122AGJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2122AGJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2122AGJ-P?
MP2122AGJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2122AGJ-P 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 MP2122AGJ-P?
For technical support, including MP2122AGJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2122AGJ-P requirements.
6.How does Aetrix verify that MP2122AGJ-P is sourced from the original manufacturer or authorized distributors?
All MP2122AGJ-P 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 MP2122AGJ-P meets industry standards.
7.What is the process for return or replacement of MP2122AGJ-P?
All MP2122AGJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2122AGJ-P, 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 MP2122AGJ-P part is unused and in its original packaging.
Return procedure for MP2122AGJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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