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Microchip Technology MCP1602-330I/MS
- Part No.:
- MCP1602-330I/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1602-330I/MS.pdf
- Description:
- IC REG BUCK 3.3V 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:739
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Product details
Overview
MCP1602-330I/MS from Microchip Technology is a fixed-output 3.3V, 500 mA synchronous buck regulator in MSOP-8 package, featuring 2.0 MHz PWM switching, power-good monitoring with 262 ms delay, and operation from 2.7V–5.5V input-designed for Li-Ion–powered portable equipment requiring high efficiency and low quiescent current (45 µA typical).
For engineers reviewing the MCP1602-330I/MS datasheet, MCP1602-330I/MS pinout, MCP1602-330I/MS application, or MCP1602-330I/MS equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support for volume procurement and BOM continuity.
Technical Context
The MCP1602-330I/MS operates in automatic PWM-to-PFM mode transition: at heavy loads (>100 mA), it runs at fixed 2.0 MHz PWM for low ripple and noise; at light loads, it shifts to PFM to maintain 45 µA quiescent current. Its integrated P- and N-channel MOSFETs (RDS(on) = 450 mΩ each) enable full synchronous rectification without external diodes.
It incorporates undervoltage lockout (UVLO = 2.55 V typ., 200 mV hysteresis), overtemperature shutdown (150°C trip, 10°C hysteresis), cycle-by-cycle overcurrent protection (700 mA peak limit), and an open-drain power-good output that asserts after 262 ms when VOUT reaches ≥94% of 3.3V regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.5% - eliminates need for external feedback divider; supports direct interface with 3.3V logic and I/O rails. |
| Max Output Current | 500 mA continuous - sufficient for powering microcontrollers, sensors, and USB peripherals from single-cell Li-Ion or 3-cell NiMH sources. |
| Input Voltage Range | 2.7V to 5.5V - compatible with 1-cell Li-Ion (2.7–4.2V), 3-cell NiMH (3.6–4.5V), and USB 5V (with dropout margin). |
| Switching Frequency | 2.0 MHz (typ.) - enables use of small 4.7 µH inductors and 4.7 µF ceramic capacitors, minimizing PCB footprint. |
| Quiescent Current | 45 µA (typ.) - extends battery life in always-on or low-duty-cycle portable systems such as PDAs and digital cameras. |
| Power-Good Delay | 262 ms (typ.) - ensures stable output before system reset release; prevents false triggers during startup transients. |
| Thermal Resistance | θJA = 211°C/W (MSOP-8) - requires minimal copper area for thermal management in handheld designs. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch), surface-mount, with exposed thermal pad not present (DFN variant has EP; MSOP does not).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN) | Enable/disable control input | Logic-high (>45% VIN) enables regulation; logic-low (<15% VIN) disables IC with 0.05 µA shutdown current. |
| 2 (VCC) | Analog bias supply | Internally regulated analog rail derived from VIN; decoupling capacitor required for stability. |
| 3 (PG) | Open-drain power-good output | Asserts low when VOUT < 92% of 3.3V; requires external pull-up for system reset or sequencing logic. |
| 4 (AGND) | Analog ground reference | Must be connected to quiet analog ground plane; separate from PGND to minimize noise coupling into feedback path. |
| 5 (VOUT) | Fixed-output voltage node | 3.3V regulated output; connects directly to load and output capacitor-no resistor divider needed. |
| 6 (VIN) | Main power input | Accepts 2.7–5.5V; requires 4.7 µF low-ESR ceramic input capacitor placed near pin for ripple suppression. |
| 7 (LX) | Switch node | Connects to inductor; carries high di/dt current-requires short, wide trace to minimize EMI and voltage spikes. |
| 8 (PGND) | Power ground return | Carries high-current switch return path; must be routed separately from AGND and joined at single point near input capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM/PFM mode transition | Maintains >90% efficiency across 0.1–500 mA load range without external control-reduces design complexity and component count. |
| Internally compensated control loop | Eliminates need for external compensation network (RCOMP/CCOMP), simplifying layout and reducing bill-of-materials for fixed-output variants. |
| Integrated synchronous MOSFETs | P- and N-channel switches (450 mΩ RDS(on)) replace external diode, improving efficiency by ~5–10% vs. asynchronous buck designs. |
| Power-good with built-in delay and hysteresis | 262 ms active timeout and 2% threshold hysteresis prevent false resets during line/load transients-enables reliable system boot sequencing. |
| Robust protection suite | UVLO (2.55 V), overtemperature (150°C), and cycle-by-cycle overcurrent (700 mA) ensure safe operation under fault conditions without external circuitry. |
Applications
| Cellular Telephones | USB-Powered Devices |
|---|---|
Use Scenario: Powering baseband processor, RF transceiver, and display backlight from single-cell Li-Ion battery (2.7–4.2V). IC Role / Device Role / Timing Role: Primary 3.3V DC-DC converter delivering regulated supply with fast transient response and low noise. Use Value: Enables >90% efficiency at 300 mA load and 45 µA quiescent current-extending talk time and standby duration. |
Use Scenario: Converting 5V USB power to clean 3.3V for microcontroller, USB PHY, and sensor interfaces. IC Role / Device Role / Timing Role: Input-voltage-tolerant buck regulator with UVLO and soft-start to meet USB inrush and sequencing requirements. Use Value: Fixed 3.3V output eliminates feedback resistors; 2.0 MHz switching allows compact 4.7 µH inductor and 4.7 µF ceramic caps. |
| Digital Cameras | Portable Computers |
Use Scenario: Supplying image sensor, ISP, and memory interface from 3-cell NiMH pack (3.6–4.5V). IC Role / Device Role / Timing Role: High-efficiency step-down regulator with power-good signaling for controlled camera boot and sleep/wake transitions. Use Value: PG output provides 262 ms delay before asserting ready signal-ensuring stable 3.3V rail before sensor initialization. |
Use Scenario: Generating 3.3V core voltage for embedded controllers, touchpad, and I/O hubs in ultra-thin notebooks. IC Role / Device Role / Timing Role: Compact, thermally efficient buck regulator in MSOP-8 package supporting tight board space constraints. Use Value: θJA = 211°C/W enables operation up to +85°C ambient without heatsink-suitable for fanless portable designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS62231DRYR | 3.3V fixed, 600 mA, 3 MHz switching, 17 µA quiescent current; smaller 6-pin WSON package. | Lacks power-good output and UVLO hysteresis; requires external soft-start capacitor for controlled ramp. | Preferred where ultra-low IQ and higher frequency (smaller L/C) are critical, and PG is handled externally. |
| Analog Devices ADP2303ARDZ-3.3-R7 | 3.3V fixed, 3 A, 600 kHz switching, 2.5 mA quiescent current; includes adjustable soft-start and precision enable threshold. | Higher current capability but larger SOIC-8 package and higher IQ-less suitable for battery-constrained devices. | Selected when higher output current headroom or industrial-grade thermal performance (−40°C to +125°C) is required. |
Compared with MCP1602-330I/MS, TPS62231DRYR offers lower quiescent current and higher switching frequency but omits power-good functionality, while ADP2303ARDZ-3.3-R7 provides greater current capacity and extended temperature range at the cost of higher static power and larger footprint-making MCP1602-330I/MS optimal for cost-sensitive, space-constrained portable designs needing integrated PG and proven Li-Ion compatibility.
Availability
MCP1602-330I/MS is available at Aetrix Electronics and suitable for cellular telephones, USB-powered devices, and digital cameras requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MCP1602-330I/MS 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
Microchip Technology Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and development tools.
The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC converters optimized for battery-powered portable electronics-emphasizing efficiency across wide load ranges, minimal external components, and robust protection for unattended operation.
FAQ
What is the input voltage range supported by the MCP1602-330I/MS?
The MCP1602-330I/MS supports an input voltage range of 2.7V to 5.5V. This range accommodates single-cell Li-Ion batteries (2.7–4.2V), three-cell NiMH/NiCd packs (3.6–4.5V), and regulated 5V sources like USB ports-provided the minimum input satisfies VIN ≥ VOUT + 0.5V (i.e., ≥3.8V for 3.3V output).
Does the MCP1602-330I/MS require external compensation components?
No, the MCP1602-330I/MS is internally compensated for its fixed 3.3V output configuration. Unlike adjustable versions, it does not require external RCOMP or CCOMP components-reducing BOM count and layout complexity while ensuring stable regulation across temperature and load.
How does the power-good (PG) output behave during startup and fault conditions?
The MCP1602-330I/MS PG pin remains low until VOUT reaches ≥94% of 3.3V (≈3.10V), then asserts high after a 262 ms delay. If VOUT falls below 92% (≈3.04V), PG transitions low within 165 µs. During UVLO, overtemperature, or overcurrent faults, PG goes low immediately-providing reliable system sequencing and fault indication.
What package type is used for the MCP1602-330I/MS, and what are its thermal characteristics?
The MCP1602-330I/MS uses the 8-pin MSOP package (3.0 mm × 4.9 mm). Its junction-to-ambient thermal resistance is 211°C/W on a standard 4-layer PCB with internal ground plane-enabling operation up to +85°C ambient at full 500 mA load without forced airflow or heatsinking.
Can the MCP1602-330I/MS be used in PFM mode only, or is PWM mode mandatory under heavy load?
The MCP1602-330I/MS automatically transitions between modes: it operates in fixed-frequency 2.0 MHz PWM mode above ~100 mA load for low ripple and noise, and switches to PFM mode below that threshold to minimize quiescent current. No external control is needed-the transition is seamless and fully internal, ensuring optimal efficiency across the entire 0.1–500 mA range.
MCP1602-330I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MCP1602-330I/MS FAQ
1.How can I place an order for MCP1602-330I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602-330I/MS 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 MCP1602-330I/MS reliable?
The price and inventory of MCP1602-330I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1602-330I/MS is usually 5 days.
3.What payment methods are accepted for MCP1602-330I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602-330I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602-330I/MS?
MCP1602-330I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602-330I/MS 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 MCP1602-330I/MS?
For technical support, including MCP1602-330I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602-330I/MS requirements.
6.How does Aetrix verify that MCP1602-330I/MS is sourced from the original manufacturer or authorized distributors?
All MCP1602-330I/MS 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 MCP1602-330I/MS meets industry standards.
7.What is the process for return or replacement of MCP1602-330I/MS?
All MCP1602-330I/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602-330I/MS, 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 MCP1602-330I/MS part is unused and in its original packaging.
Return procedure for MCP1602-330I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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