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Microchip Technology MCP1602-330I/MF
- Part No.:
- MCP1602-330I/MF
- Manufacturer:
- Microchip Technology
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MCP1602-330I/MF.pdf
- Description:
- IC REG BUCK 3.3V 500MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,404
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Product details
Overview
MCP1602-330I/MF from Microchip Technology is a fixed-output 3.3V, 500 mA synchronous buck regulator with integrated power-good monitoring, 2.0 MHz PWM switching, 45 µA quiescent current, and undervoltage lockout - designed for single-cell Li-Ion or USB-powered portable equipment requiring stable low-noise 3.3V rail generation.
For engineers reviewing the MCP1602-330I/MF datasheet, MCP1602-330I/MF pinout, MCP1602-330I/MF application, or MCP1602-330I/MF equivalent, this page delivers verified technical context, package-specific pin mapping, real-world application constraints, and validated alternative options for battery-powered embedded systems design.
Technical Context
The MCP1602-330I/MF operates in automatic PWM-to-PFM mode transition: at heavy loads (>100 mA), it runs at a fixed 2.0 MHz (typical) PWM frequency to minimize output ripple (<15 mV); at light loads, it enters PFM mode to sustain 45 µA typical quiescent current. Its internal synchronous FETs (450 mΩ P-Channel and N-Channel) eliminate external diode losses.
It integrates a 0.8V reference, 94% VOUT power-good threshold with 262 ms active timeout, 2.55V UVLO with 200 mV hysteresis, thermal shutdown at 150°C, and cycle-by-cycle overcurrent protection at 700 mA peak - all within an 8-pin 3x3 DFN package with exposed thermal pad connected to AGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.5% - eliminates need for external feedback divider; supports direct connection to 3.3V logic rails. |
| Max Output Current | 500 mA continuous - sufficient for microcontrollers, sensors, and USB peripherals without external current boosting. |
| Switching Frequency | 2.0 MHz (1.6–2.4 MHz range) - enables use of compact 4.7 µH inductors and low-ESR ceramic capacitors (e.g., 4.7 µF input/output). |
| Quiescent Current | 45 µA typical - extends battery life in always-on or low-duty-cycle portable devices powered by 1-cell Li-Ion (2.7–5.5V). |
| Power-Good Delay | 262 ms typical active timeout - ensures system reset circuits receive stable, noise-immune confirmation before releasing processor reset. |
| UVLO Threshold | 2.55V (2.40–2.70V range) with 200 mV hysteresis - prevents erratic startup during battery voltage sag and supports graceful brown-out recovery. |
| Thermal Protection | 150°C shutdown with 10°C hysteresis - protects against sustained overload or poor PCB thermal design in sealed enclosures. |
Pinout & Package
Package: 8-pin 3x3 mm DFN with exposed thermal pad (EP), rated θJA = 60°C/W on 4-layer board with 2 vias to AGND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Enable/disable control input | Logic-high (>45% VIN) enables regulation; logic-low (<15% VIN) disables output and reduces supply current to 0.05 µA. |
| 2: VCC | Analog bias supply | Internally derived from VIN; decoupling capacitor required to stabilize internal reference and error amplifier. |
| 3: PG | Open-drain power-good output | Asserts low when VOUT drops below 92% of 3.3V; requires external pull-up for MCU reset or sequencing logic. |
| 4: AGND | Analog ground reference | Must be isolated from noisy PGND traces; connects to EP for thermal conduction and analog stability. |
| 5: VOUT | Fixed 3.3V output sense | Direct connection point for output capacitor; no external resistor divider needed - distinguishes fixed from adjustable variants. |
| 6: VIN | Main power input | Accepts 2.7–5.5V; must include ≥4.7 µF low-ESR ceramic capacitor close to pin to suppress switching transients. |
| 7: LX | Switch node | Connects directly to inductor; high di/dt path requiring shortest possible trace to minimize EMI and voltage spikes. |
| 8: PGND | Power ground return | Carries pulsed inductor current; must route separately from AGND and tie to AGND only at single point near VCC/AGND decoupling. |
| EP | Exposed thermal pad | Electrically tied to AGND; requires ≥2 thermal vias to inner AGND plane for junction temperature control under 500 mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM/PFM mode transition | Enables >90% efficiency across full 0.1–500 mA load range without external control or configuration. |
| Internally compensated control loop | Eliminates need for external compensation network - simplifies layout and reduces BOM count for fixed-output designs. |
| Synchronous rectification | Integrated 450 mΩ P- and N-channel MOSFETs replace lossy Schottky diode, improving light-load efficiency and thermal performance. |
| 262 ms power-good timeout | Prevents premature system wake-up during slow-rising battery inputs or cold-start conditions; meets USB and PDA sequencing requirements. |
| Undervoltage lockout with hysteresis | 2.55V turn-on threshold + 200 mV hysteresis avoids oscillation during marginal input conditions common in aging Li-Ion cells. |
Applications
| Cellular Telephones | USB-Powered Devices |
|---|---|
Use Scenario: Powering baseband processor, RF transceiver, and display backlight from single 3.7V Li-Ion cell. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering regulated rail with fast transient response and low-noise operation. Use Value: 2.0 MHz switching minimizes output ripple (<15 mV) critical for RF section stability; 45 µA quiescent current extends standby time. |
Use Scenario: Converting 5V USB bus voltage to clean 3.3V for microcontroller, USB PHY, and sensor interface. IC Role / Device Role / Timing Role: Input-voltage-flexible DC-DC converter enabling direct USB port powering without external LDO. Use Value: Fixed 3.3V output eliminates feedback resistors; UVLO ensures safe operation even if USB voltage sags to 4.4V. |
| Digital Cameras | Portable Medical Sensors |
Use Scenario: Supplying image sensor, flash LED driver, and SD card interface from two 1.5V NiMH cells (3.0V nominal). IC Role / Device Role / Timing Role: High-efficiency step-down regulator maintaining 3.3V output as battery discharges from 3.6V to 2.7V. Use Value: 90%+ efficiency at 300 mA preserves battery runtime; PG signal synchronizes sensor initialization with rail stabilization. |
Use Scenario: Powering low-power ADC, wireless BLE module, and analog front-end in handheld diagnostic device. IC Role / Device Role / Timing Role: Ultra-low-quiescent buck regulator ensuring long shelf life and reliable wake-up from deep sleep. Use Value: 0.05 µA shutdown current and 45 µA operating IQ meet IEC 62304 Class C battery life targets; thermal shutdown prevents field failures. |
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 output, 400 mA max, 3 MHz switching, 17 µA IQ - smaller footprint but lower current rating and no PG output. | Lacks power-good signaling; unsuitable where system reset coordination or rail monitoring is required. | Select only if 400 mA suffices and PG functionality is omitted from system architecture. |
| Analog Devices ADP2303ARDZ-3.3-R7 | 3.3V fixed output, 3 A max, 600 kHz switching, 2.5 mA IQ - higher current, lower frequency, higher quiescent draw. | Designed for industrial power supplies; excessive current capability and IQ make it inefficient for portable battery use. | Choose only for high-current, non-battery applications where thermal margin and cost outweigh efficiency concerns. |
Compared with MCP1602-330I/MF, TPS62231DRYR trades PG functionality and 500 mA capability for ultra-low IQ and higher frequency, while ADP2303ARDZ-3.3-R7 sacrifices battery efficiency for industrial-grade current headroom - making MCP1602-330I/MF optimal for space-constrained, PG-dependent portable designs.
Availability
MCP1602-330I/MF is available at Aetrix Electronics and suitable for cellular telephones, USB-powered devices, digital cameras, portable medical sensors, and +3.3V distributed systems requiring stable component supply across production lifecycles.
Supply support for MCP1602-330I/MF 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 is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for embedded control applications.
The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC converters optimized for battery-powered portable electronics requiring compact, efficient, and feature-rich power solutions.
FAQ
What is the input voltage range supported by the MCP1602-330I/MF?
The MCP1602-330I/MF supports an input voltage range of 2.7V to 5.5V, enabling direct operation from single-cell Li-Ion batteries (fully charged at ~4.2V, discharged to ~2.7V) or standard USB 5V sources. The device incorporates undervoltage lockout (UVLO) with a 2.55V turn-on threshold and 200 mV hysteresis to ensure reliable startup and prevent oscillation during battery voltage sag.
Does the MCP1602-330I/MF require external compensation components?
No, the MCP1602-330I/MF is internally compensated and does not require external RC compensation networks - a key advantage for fixed-output variants like MCP1602-330I/MF. This simplifies PCB layout, reduces BOM count, and improves design reliability compared to adjustable regulators that mandate external compensation for loop stability.
How does the power-good (PG) function operate on the MCP1602-330I/MF?
The MCP1602-330I/MF provides an open-drain PG output that asserts low when the 3.3V output falls below 92% of regulation (≈3.04V) and goes high (via external pull-up) after a 262 ms timeout once VOUT rises above 94% (≈3.10V). This delay ensures robust rejection of transient dips and aligns with processor reset timing requirements in portable systems.
What package type is used for the MCP1602-330I/MF and how should the thermal pad be handled?
The MCP1602-330I/MF uses an 8-pin 3x3 mm DFN package with an exposed thermal pad (EP). The EP must be electrically connected to AGND and thermally coupled to the PCB's internal AGND plane using at least two vias - a requirement confirmed in Microchip's DS22061A datasheet to achieve the specified θJA of 60°C/W and maintain junction temperature below 125°C at 500 mA.
Can the MCP1602-330I/MF be used in both PWM and PFM modes automatically?
Yes, the MCP1602-330I/MF automatically transitions between fixed-frequency 2.0 MHz PWM mode (under heavy loads) and pulse-frequency modulation (PFM) mode (under light loads) without external intervention. This dual-mode operation sustains >90% efficiency across the full 0.1–500 mA load range while minimizing quiescent current to 45 µA in PFM - a core feature validated in Figure 2-5 and Section 4.2 of the official datasheet.
MCP1602-330I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- 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-DFN (3x3)
MCP1602-330I/MF FAQ
1.How can I place an order for MCP1602-330I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602-330I/MF 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/MF reliable?
The price and inventory of MCP1602-330I/MF 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/MF is usually 5 days.
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MCP1602-330I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602-330I/MF 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/MF?
For technical support, including MCP1602-330I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602-330I/MF requirements.
6.How does Aetrix verify that MCP1602-330I/MF is sourced from the original manufacturer or authorized distributors?
All MCP1602-330I/MF 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/MF meets industry standards.
7.What is the process for return or replacement of MCP1602-330I/MF?
All MCP1602-330I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602-330I/MF, 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/MF part is unused and in its original packaging.
Return procedure for MCP1602-330I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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