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Monolithic Power Systems Inc. MP2166GRH-P
- Part No.:
- MP2166GRH-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 18-PowerVFQFN
- Datasheet:
-
MP2166GRH-P.pdf
- Description:
- IC REG BUCK ADJ DL 18QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,746
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Product details
Overview
MP2166GRH-P from Monolithic Power Systems is a dual-channel, synchronous buck regulator supporting 2A/2A or 3A/1A output configurations, operating from 2.7V–6V input with 0.6V adjustable output, 60µA quiescent current, and integrated 55mΩ/20mΩ MOSFETs-designed for single-cell Li+-powered smartphones and portable instruments.
For engineers reviewing the MP2166GRH-P datasheet, MP2166GRH-P pinout, MP2166GRH-P application, or MP2166GRH-P equivalent, key selection criteria include dual-channel phase-shifted operation, programmable soft-start, power-good indicators per channel, and support for forced CCM or AAM light-load modes in QFN-18 (2.5mm×3.5mm) package.
Technical Context
The MP2166GRH-P implements peak-current-mode control with internal compensation per channel, enabling fast transient response and cycle-by-cycle current limiting without external loop components. Its 180° out-of-phase switching reduces input ripple and allows smaller input capacitors.
Each channel supports 100% duty-cycle operation for low-dropout regulation and features independent soft-start (SS1/SS2), feedback (FB1/FB2), enable (EN1/EN2), and power-good (PG1/PG2) pins-enabling flexible sequencing, tracking, and fault monitoring in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 6V - compatible with single-cell Li+ battery (3.0V–4.2V nominal) and USB-powered systems. |
| Output Current Config | 2A/2A or 3A/1A - selectable via inductor sizing and layout; enables optimized rail allocation for SoC + peripheral power. |
| RDS(ON) | 55mΩ HS / 20mΩ LS - integrated MOSFETs eliminate external Schottky diodes and reduce conduction loss at full load. |
| Quiescent Current | 60µA - enables >100-hour standby in battery-powered devices without compromising startup responsiveness. |
| Switching Frequency | Up to 3MHz - supports compact 1.5µH inductors and ceramic output caps; externally synchronizable via FREQ pin. |
| Feedback Reference | 0.600V ±12mV - precise reference enables accurate 1.2V, 1.5V, 1.8V, and 3.3V outputs using standard resistor dividers. |
| Thermal Shutdown | 175°C with 40°C hysteresis - protects against sustained overload while allowing brief high-temp operation during transients. |
Pinout & Package
MP2166GRH-P is housed in a thermally enhanced QFN-18 package (2.5mm × 3.5mm, 0.5mm pitch) with exposed thermal pad. The package supports high-power density layouts and requires PCB vias under the pad for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 PGND1 / PGND2 | Power ground (channel 1 & 2) | Separate low-impedance return paths minimize cross-talk between channels; must connect to large copper areas and thermal vias. |
| 2, 12 SW1 / SW2 | Switch node (channel 1 & 2) | High-dV/dt nodes requiring short, direct routing to inductors; critical for EMI and efficiency. |
| 3, 11 VIN1 / VIN2 | Input supply (channel 1 & 2) | Independent inputs allow split-rail or shared-input configurations; each requires local 22µF ceramic decoupling. |
| 4, 10 SS1 / SS2 | Soft-start control (channel 1 & 2) | Programmable ramp rate prevents inrush; external capacitor sets start-up time (e.g., 1nF ≈ 0.3ms). |
| 5, 9 FB1 / FB2 | Feedback input (channel 1 & 2) | Connects to resistive divider; 0.6V reference enables precise output setting; sensitive to noise-keep trace short and away from SW. |
| 6 AGND | Analog ground | Reference for internal error amplifiers and comparators; must be tied externally to PGND at single point near VCC decoupling. |
| 7 VCC | Bias supply | Internal LDO output powering control circuitry; requires 0.1–1µF ceramic cap to AGND for stability. |
| 8 CCM | Mode control | Logic-level input selects forced CCM (>1.6V) for fixed-frequency light-load operation or AAM (<0.4V) for peak efficiency at no load. |
| 14, 18 PG1 / PG2 | Power-good open-drain output | Indicates regulation status per channel (82% rise / 76% fall of VFB); requires external pull-up to VIN or VCC. |
| 15, 17 EN1 / EN2 | Enable input | Active-high logic control; 1.6V threshold ensures robust noise immunity; shutdown current <0.2µA at 25°C. |
| 16 FREQ | Frequency set/sync | Resistor-to-GND sets oscillator (298–3300kHz); also accepts external 0.35–3MHz clock for system-wide timing alignment. |
Key Features
| Feature | Design Value |
|---|---|
| 180° phase-shifted dual-channel operation | Reduces input RMS current by ~30%, enabling smaller input capacitors and lower EMI across 2.7–6V range. |
| Adjustable advanced asynchronous mode (AAM) | Extends battery life by reducing switching losses at light loads while maintaining regulated output without burst-mode noise. |
| Integrated high-side/low-side MOSFETs | Eliminates external discrete switches and Schottky diodes-reducing BOM count, board area, and thermal design complexity. |
| Dual independent power-good (PG) outputs | Enables sequenced power-up and fault isolation in multi-rail systems-critical for SoC, memory, and sensor subsystems. |
| 100% duty-cycle capability | Supports ultra-low dropout operation down to VOUT = VIN − ILOAD × RDS(ON), essential for Li+ battery end-of-discharge conditions. |
Applications
| Smartphones | Portable Medical Instruments |
|---|---|
Use Scenario: Dual-rail power for application processor core (1.1V/2A) and I/O/memory (1.8V/2A) from single Li+ cell. IC Role / Device Role / Timing Role: Primary voltage regulator delivering tightly regulated, low-noise, phase-shifted DC rails with independent enable and PG signaling. Use Value: Enables simultaneous high-efficiency operation of compute and interface domains while minimizing input capacitance and thermal footprint. |
Use Scenario: Powering microcontroller, display driver, and analog front-end in handheld glucose meter or pulse oximeter. IC Role / Device Role / Timing Role: Compact dual-output buck supplying 3.3V (MCU) and 2.8V (sensor bias) with ultra-low quiescent current and reliable power sequencing. Use Value: Extends battery life beyond 100 hours in standby while ensuring deterministic startup and fault reporting for safety-critical use. |
| Feature Phones | Wearable Audio Devices |
Use Scenario: Generating 1.2V (baseband SoC) and 2.8V (RF transceiver) from 3.6V nominal Li+ battery with minimal PCB area. IC Role / Device Role / Timing Role: Integrated dual-buck converter with independent soft-start and PG for robust power delivery in cost-sensitive, space-constrained designs. Use Value: Reduces bill-of-materials by eliminating two discrete regulators and associated passives-lowering total solution cost and assembly complexity. |
Use Scenario: Supplying 1.2V (DSP core) and 1.8V (codec/ADC) in Bluetooth earbuds with strict thermal and size constraints. IC Role / Device Role / Timing Role: High-frequency (2.25MHz) dual buck enabling 1.5µH inductors and 22µF ceramic caps-minimizing solution volume and acoustic noise. Use Value: Achieves >90% peak efficiency at 100mA–2A loads while suppressing audible switching noise through fixed-frequency CCM operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2164GRH-P | Single-channel, 4A output; lacks second channel, PG2, SS2, FB2, and phase-shift capability. | Suitable only for single-rail systems; cannot replace MP2166GRH-P in dual-output designs without redesign. | Select when only one regulated rail is needed and higher per-channel current (4A) is required. |
| TPS65217CRSLR | PMIC with dual bucks (3A/3A), LDOs, battery charger, and fuel gauge; larger QFN-48 package; 2.7–5.5V input. | Targets full-system power management in tablets; adds complexity and cost where only dual bucks are needed. | Choose when integrating battery charging, multiple LDOs, or fuel gauging is required alongside dual bucks. |
Compared with MP2166GRH-P, MP2164GRH-P sacrifices channel count and sequencing flexibility for higher single-rail current, while TPS65217CRSLR adds system-level integration at the expense of size, cost, and design simplicity for dedicated dual-buck applications.
Availability
MP2166GRH-P is available at Aetrix Electronics and suitable for smartphones, portable medical instruments, feature phones, and wearable audio devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2166GRH-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 a focus on energy-efficient DC-DC conversion, motor drivers, and LED lighting solutions.
The MP2166 product line delivers compact, high-efficiency dual-buck regulators targeting battery-powered portable electronics where low quiescent current, small solution size, and precise multi-rail sequencing are critical.
FAQ
What is the maximum supported switching frequency and how is it set?
The MP2166GRH-P supports up to 3MHz switching frequency, set by an external resistor (RFREQ) from FREQ pin to GND. Typical values are 665kΩ (350kHz), 200kΩ (1MHz), or 51kΩ (3MHz). The FREQ pin also accepts external sync clocks from 350kHz to 3MHz for system-level timing alignment.
How does the 180° phase shift improve system performance?
The 180° out-of-phase operation between channels reduces input current ripple amplitude by ~30%, allowing smaller input capacitors (e.g., 22µF instead of 47µF) and lowering conducted EMI. This is especially beneficial in space-constrained portable designs powered by single-cell Li+ batteries.
Can MP2166GRH-P operate with only one channel enabled?
Yes. Either channel can be independently disabled via its EN pin (EN1 or EN2). When one channel is disabled, the other continues full operation with unchanged regulation, protection, and soft-start behavior. PG output for the disabled channel remains low until re-enabled and stabilized.
What thermal considerations apply to the QFN-18 (2.5mm×3.5mm) package?
The QFN-18 (2.5mm×3.5mm) package has θJA = 50°C/W on a 4-layer PCB. To maintain junction temperature ≤125°C at 2A/2A load, the PCB must include thermal vias under the exposed pad connected to inner-layer ground planes. Layout guidelines require short, wide traces for PGND, VIN, and SW nodes to minimize resistance and inductance.
How does Advanced Asynchronous Mode (AAM) differ from Forced CCM?
AAM disables switching when inductor current reaches zero, minimizing light-load losses for peak efficiency at no load. Forced CCM maintains fixed-frequency operation down to no load, reducing output ripple but increasing quiescent current (50µA vs. 60µA). CCM pin voltage selects mode: <0.4V for AAM, >1.6V for CCM.
What protection features are integrated and how do they respond to faults?
Integrated protections include cycle-by-cycle over-current (4.5A typical), short-circuit hiccup mode (auto-retry with soft-start), thermal shutdown (175°C), and input UVLO (2.55V rising). During hiccup, the device disables outputs, discharges SS capacitors, and restarts after a cooldown period-preventing thermal runaway without external intervention.
Is the MP2166GRH-P pin-compatible with other MP2166 variants?
Yes. MP2166GRH-P shares identical pinout and functionality with MP2166GD (QFN-18, 2mm×3mm) and MP2166GR (QFN-18, 2.5mm×3.5mm). The "-P" suffix denotes tape-and-reel packaging; electrical and thermal specs are identical across GRH and GR variants.
MP2166GRH-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 18-PowerVFQFN
- 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):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A, 2A, 1A, 3A
- Frequency - Switching:
- Up to 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 18-QFN (2.5x3.5)
MP2166GRH-P FAQ
1.How can I place an order for MP2166GRH-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2166GRH-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 MP2166GRH-P reliable?
The price and inventory of MP2166GRH-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2166GRH-P is usually 5 days.
3.What payment methods are accepted for MP2166GRH-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2166GRH-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2166GRH-P?
MP2166GRH-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2166GRH-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 MP2166GRH-P?
For technical support, including MP2166GRH-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2166GRH-P requirements.
6.How does Aetrix verify that MP2166GRH-P is sourced from the original manufacturer or authorized distributors?
All MP2166GRH-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 MP2166GRH-P meets industry standards.
7.What is the process for return or replacement of MP2166GRH-P?
All MP2166GRH-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2166GRH-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 MP2166GRH-P part is unused and in its original packaging.
Return procedure for MP2166GRH-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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