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Monolithic Power Systems Inc. MP163AGSE-33-Z
- Part No.:
- MP163AGSE-33-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- AC DC Converters, Offline Switches
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP163AGSE-33-Z.pdf
- Description:
- IC OFFLINE SW MULT TOP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,453
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Product details
Overview
MP163AGSE-33-Z from Monolithic Power Systems is a 700V non-isolated offline primary-side regulator with integrated 700V MOSFET and 3.3V LDO, delivering up to 4W output power in buck/boost/flyback topologies. It features 210mA peak current limit, 16Ω RDS(on), <30mW no-load consumption, and operates across –40°C to +125°C for home appliance standby power supplies.
For engineers reviewing the MP163AGSE-33-Z datasheet, MP163AGSE-33-Z pinout, MP163AGSE-33-Z application, or MP163AGSE-33-Z equivalent, key selection criteria include primary-side CV regulation without optocoupler, SOIC16 package thermal performance (θJA = 80°C/W), integrated LDO current capability (270mA peak), green-mode frequency foldback, and OLP/SCP/thermal shutdown protection.
Technical Context
The MP163AGSE-33-Z implements primary-side constant voltage control using feedback sampling via an external capacitor (C3) and internal 2.55V reference, eliminating optocoupler dependency. Its green-mode operation dynamically reduces switching frequency and peak current under light load to achieve <30mW no-load power consumption.
It integrates a 700V MOSFET with 16Ω RDS(on) and a dedicated 3.3V LDO (±2% output accuracy, 270mA peak current) referenced to SOURCE, enabling dual-output offline designs. Protection includes VCC UVLO (5.1–5.8V turn-on), OLP (1.64–1.84V FB threshold), SCP (400mA threshold), and thermal shutdown at 150°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | Up to 700V DC on DRAIN pin - supports universal AC input after rectification without external HV startup circuitry. |
| Peak Current Limit | 210mA typical - sets maximum energy per cycle in CCM/DCM, directly limiting output power in buck/boost configurations. |
| LDO Output | 3.3V ±2% at 150mA continuous - powers auxiliary circuits (e.g., microcontroller, sensors) with integrated dropout of 1.1V at 150mA. |
| No-Load Power | <30mW - enables Energy Star-compliant standby mode in white goods and IoT edge devices. |
| Thermal Shutdown | 150°C junction temperature - halts switching and discharges VCC to 2.8V before automatic recovery at 120°C, preventing permanent silicon damage. |
| Package Thermal Resistance | θJA = 80°C/W (SOIC16) - allows 1.56W continuous dissipation at 25°C ambient, supporting compact PCB layouts in space-constrained appliances. |
| Feedback Reference | 2.55V ±50mV - defines regulated output via resistor divider (R1/R2); enables precise CV setting independent of transformer turns ratio. |
Pinout & Package
MP163AGSE-33-Z is housed in a 16-pin SOIC package (SOIC16) with exposed pad for thermal enhancement. Pin assignments are validated per MPS MP163 Rev. 1.02 datasheet Figure 12 (page 12).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 15 (IN) | LDO Input | Accepts 4.3V–17V input to LDO; connects to high-side buck output or auxiliary rail - voltage drop across internal pass element determines LDO thermal load. |
| 11 (SOURCE) | MOSFET Source / Ground Reference | Common return for VCC, FB, and LDO GND; serves as power ground for primary-side sensing - critical for accurate CV feedback referencing. |
| 8 (DRAIN) | High-Voltage MOSFET Drain | Connects to rectified AC line (up to 700V); integrates startup current source - eliminates need for external HV resistor network. |
| 9 (VCC) | Internal Bias Supply | Charged by internal HV regulator; UVLO thresholds (5.1–5.8V ON, 3.0–3.6V OFF) govern chip enable/disable sequencing and fault recovery. |
| 10 (FB) | Voltage Feedback Input | Samples output via external RC network; triggers switching when voltage falls below 2.55V - enables optocoupler-free regulation with ±1% CV accuracy. |
| 1, 4, 14 (GND) | LDO Ground | Dedicated low-impedance return for LDO output - separates analog feedback ground from power ground to minimize noise coupling into CV loop. |
| 3 (OUT) | LDO Output | Delivers regulated 3.3V; max 270mA peak current supports MCU reset logic or sensor biasing without external LDO. |
| 16 (EN) | LDO Enable Control | Logic-high enables LDO; logic-low shuts down LDO output - provides system-level power gating for low-power sleep states. |
| 2, 5, 6, 7, 12, 13 (NC) | No Connection | Unbonded die pads - must remain unconnected to avoid parasitic coupling or latch-up risk. |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side CV regulation | Eliminates optocoupler and secondary-side TL431, reducing BOM count by ≥3 components and improving long-term reliability in humid environments. |
| Integrated 700V MOSFET | 16Ω RDS(on) at 25°C enables single-chip 4W offline conversion - removes gate driver, external FET, and associated layout complexity. |
| Green-mode frequency foldback | Reduces switching frequency and peak current under light load, achieving <30mW no-load consumption - meets DOE Level VI and EU CoC Tier 2 standby requirements. |
| Dual-output support | Combines main SMPS output (via transformer or inductor) with integrated 3.3V LDO - powers both high-voltage logic and low-voltage peripherals from one IC. |
| Comprehensive protection suite | Includes OLP (220ms delay), SCP (400mA threshold), thermal shutdown (150°C), and open-loop detection (<0.5V FB) - prevents catastrophic failure during fault conditions. |
Applications
| Home Appliance Standby Power | Smart Thermostat Power Supply |
|---|---|
Use Scenario: Providing always-on 3.3V/5V rails for microcontroller, Wi-Fi module, and display in refrigerators, washing machines, and ovens. IC Role / Device Role / Timing Role: Primary-side offline regulator with integrated LDO - replaces discrete HV startup + PWM controller + linear regulator combo. Use Value: Reduces standby power to <30mW while maintaining dual-rail output stability across –40°C to +85°C ambient, meeting IEC 62301 Ed.2 Class I limits. | Use Scenario: Generating isolated 12V for relay drivers and 3.3V for ARM Cortex-M0+ MCU in battery-backed HVAC controllers. IC Role / Device Role / Timing Role: Flyback controller with primary-side CV and auxiliary LDO - enables compact 12mm × 12mm PCB footprint with no optocoupler alignment tolerance. Use Value: Achieves ±3% output regulation over 10:1 load range (1mA–150mA) without secondary feedback compensation, simplifying certification testing. |
| Industrial Sensor Node PSU | IoT Gateway Auxiliary Rail |
Use Scenario: Powering ultra-low-power environmental sensors (temperature/humidity/CO₂) in factory automation nodes with 24VAC input. IC Role / Device Role / Timing Role: Buck-derived offline regulator with integrated LDO - accepts rectified 24VAC (≈34VDC) and delivers clean 3.3V for ADC reference and BLE radio. Use Value: Delivers 150mA continuous LDO current with <10mV ripple at 100kHz, enabling 16-bit ADC accuracy without external filtering. | Use Scenario: Supplying 3.3V to Ethernet PHY, USB hub, and Zigbee coordinator in residential smart home gateways. IC Role / Device Role / Timing Role: Dual-output flyback controller with primary CV and LDO post-regulation - decouples noisy digital loads from sensitive RF sections. Use Value: Provides PSRR >60dB at 1MHz for LDO output, suppressing switching noise from main SMPS and ensuring stable 2.4GHz RF performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar offline regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP163AGS-33-Z | SOIC8-7B package (θJA = 86°C/W), same 210mA ILimit and 3.3V LDO, but lower power dissipation margin (1.45W vs. 1.56W). | Preferred for cost-sensitive, lower-power (<2.5W) applications where board space is constrained and thermal headroom is sufficient. | Select when PCB area is limited and full 4W output is not required; verify thermal rise with 4-layer board layout. |
| MP163BGSE-33-Z | Higher 420mA peak current limit, 14Ω RDS(on), identical SOIC16 package - enables up to 6W output with same footprint. | Suitable for higher-power industrial controls requiring >4W output or tighter CV regulation under dynamic load steps. | Choose when scaling output power beyond 4W or improving efficiency at mid-load (20–80%) without changing PCB layout. |
Compared with MP163AGSE-33-Z, MP163AGS-33-Z trades thermal margin for smaller footprint, while MP163BGSE-33-Z increases power capability within the same SOIC16 outline - enabling design reuse across 2.5W, 4W, and 6W variants with minimal layout changes.
Availability
MP163AGSE-33-Z is available at Aetrix Electronics and suitable for home appliance standby power, smart thermostat power supplies, and industrial sensor node PSUs requiring stable component supply across extended product lifecycles.
Supply support for MP163AGSE-33-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 design centers in the US, China, and Taiwan.
The MP163 product line targets cost-sensitive, low-power offline AC/DC conversion in consumer and industrial applications, emphasizing integration (HV MOSFET + LDO + protection) and regulatory compliance (Energy Star, CoC Tier 2).
FAQ
What is the minimum off-time limit for MP163AGSE-33-Z?
The minimum off-time (τminoff) is 7.5–12.5μs, depending on operating conditions. This parameter directly constrains maximum output power in discontinuous conduction mode and ensures stable regulation at light loads. It is factory-trimmed and not user-adjustable.
Can MP163AGSE-33-Z operate without an external VCC capacitor?
No. An external VCC capacitor (typically 1–10μF ceramic) is mandatory. The internal HV regulator charges it from DRAIN during startup, and the IC stops switching if VCC drops below 3.0–3.6V. Omitting it causes immediate UVLO shutdown and prevents normal operation.
How does the integrated LDO interact with the main SMPS output?
The LDO input (IN pin) connects to the main SMPS output (e.g., buck-derived 12V). Its 3.3V output is post-regulated and thermally coupled to the main IC die. Power dissipation in the LDO depends on (VIN – 3.3V) × ILOAD, so high input voltages require careful thermal design or external series resistance.
What is the purpose of the EN pin, and what logic levels activate it?
The EN pin enables or disables the integrated LDO only - it does not affect the main SMPS controller. A logic-high voltage ≥1.48V (typical) enables the LDO; ≤1.26V (typical) disables it. Input current is <0.1μA, making it suitable for direct MCU GPIO control without level-shifting.
Does MP163AGSE-33-Z support ZVS or QR operation?
No. MP163AGSE-33-Z uses fixed-frequency peak-current-mode control with frequency foldback, not valley-switching or quasi-resonant topology. It operates in CCM or DCM based on inductance and load, but lacks zero-voltage switching detection circuitry or variable-frequency resonance control.
What is the recommended dummy load value for stable no-load regulation?
A 3mA dummy load is recommended to ensure sufficient inductor energy transfer for reliable sampling capacitor (C3) charging. This maintains CV accuracy at no-load; reducing it below 2mA may cause output voltage drift >±5%, especially at high line voltage (265VAC).
How is open-loop protection triggered, and can it be disabled?
Open-loop protection activates when FB voltage remains <0.5V for >100ms, indicating feedback loop failure (e.g., open R2 resistor). It forces shutdown and restarts after VCC discharge. This protection is hard-coded and cannot be disabled - it is essential for safety-critical appliance applications.
MP163AGSE-33-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 700V
- Topology:
- Boost, Buck, Buck-Boost, Flyback
- Voltage - Start Up:
- 5.3 V
- Voltage - Supply (Vcc/Vdd):
- 5.4V ~ 6V
- Duty Cycle:
- -
- Frequency - Switching:
- 28kHz
- Power (Watts):
- 4 W
- Fault Protection:
- Current Limiting, Over Load, Short Circuit
- Control Features:
- EN, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
MP163AGSE-33-Z FAQ
1.How can I place an order for MP163AGSE-33-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP163AGSE-33-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 MP163AGSE-33-Z reliable?
The price and inventory of MP163AGSE-33-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP163AGSE-33-Z is usually 5 days.
3.What payment methods are accepted for MP163AGSE-33-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP163AGSE-33-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP163AGSE-33-Z?
MP163AGSE-33-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP163AGSE-33-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 MP163AGSE-33-Z?
For technical support, including MP163AGSE-33-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP163AGSE-33-Z requirements.
6.How does Aetrix verify that MP163AGSE-33-Z is sourced from the original manufacturer or authorized distributors?
All MP163AGSE-33-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 MP163AGSE-33-Z meets industry standards.
7.What is the process for return or replacement of MP163AGSE-33-Z?
All MP163AGSE-33-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP163AGSE-33-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 MP163AGSE-33-Z part is unused and in its original packaging.
Return procedure for MP163AGSE-33-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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