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Microchip Technology MCP1602-120I/MF
- Part No.:
- MCP1602-120I/MF
- Manufacturer:
- Microchip Technology
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MCP1602-120I/MF.pdf
- Description:
- IC REG BUCK 1.2V 500MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,252
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Product details
Overview
MCP1602-120I/MF from Microchip Technology is a fixed-output 1.2 V, 500 mA synchronous buck DC-DC regulator in an 8-lead 3×3 mm DFN package, featuring 2.0 MHz PWM switching, power-good monitoring with 262 ms delay, and operation from 2.7–5.5 V input-designed for Li-ion–powered portable electronics requiring high efficiency at light and heavy loads.
For engineers reviewing the MCP1602-120I/MF datasheet, MCP1602-120I/MF pinout, MCP1602-120I/MF application, or MCP1602-120I/MF equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and protection behavior, and real-world substitution guidance for battery-powered embedded systems.
Technical Context
The MCP1602-120I/MF implements automatic PWM-to-PFM mode transition to maintain >90% typical efficiency across 0.1–500 mA load range; its internal 0.8 V reference and fixed 1.2 V output eliminate external feedback resistors. It integrates P-channel (450 mΩ) and N-channel (450 mΩ) MOSFETs, enabling fully synchronous operation without external diodes.
Power-good logic monitors VOUT with 94% (typical) high-threshold activation and 2% hysteresis, coupled with a 262 ms (typical) active timeout period; undervoltage lockout triggers at 2.55 V (typical) with 200 mV hysteresis, and thermal shutdown activates at 150 °C with 10 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2.5% - eliminates need for external resistor divider and simplifies layout |
| Max Output Current | 500 mA continuous - supports processor core rails and USB-peripheral power in portable devices |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion (2.7–4.2 V), 3-cell NiMH (3.6 V), and USB 5 V sources |
| Switching Frequency | 2.0 MHz (typical) - enables use of small 4.7 µH inductors and 4.7 µF ceramic capacitors |
| Quiescent Current | 45 µA (typical) - extends battery life in standby mode for handheld and IoT edge devices |
| Power-Good Delay | 262 ms (typical) - ensures stable output before system reset release or processor boot sequence |
| Thermal Shutdown | 150 °C (typical) with 10 °C hysteresis - protects against sustained overload in compact enclosures |
Pinout & Package
Package: 8-lead 3×3 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 control input | Logic-high (>45% VIN) enables regulation; logic-low (<15% VIN) disables device and reduces current to 0.05 µA |
| 2 VCC | Analog bias supply | Internally filtered VIN rail powering error amplifier, oscillator, and PG circuitry |
| 3 PG | Open-drain power-good output | Asserts low when VOUT falls below 92% of 1.2 V; requires external pull-up for system reset coordination |
| 4 AGND | Analog ground reference | Separate ground node for feedback and reference circuits; must be tied to EP and isolated from noisy PGND traces |
| 5 VOUT | Fixed-output voltage terminal | 1.2 V regulated output; connects directly to load-no external feedback network required |
| 6 VIN | Main power input | Accepts 2.7–5.5 V; requires ≥4.7 µF low-ESR ceramic capacitor placed near pin |
| 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 | High-current return path for internal MOSFETs; must be routed separately from AGND and joined at single point |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM/PFM mode transition | Maintains >90% efficiency from 0.1 mA to 500 mA without external control or configuration |
| Internally compensated control loop | Eliminates need for external compensation components-reduces BOM count and layout complexity |
| Integrated synchronous MOSFETs | P-channel (450 mΩ) + N-channel (450 mΩ) switches enable >90% efficiency without external diode losses |
| Undervoltage lockout with hysteresis | 2.55 V turn-on threshold with 200 mV hysteresis prevents oscillation during brown-out conditions |
| Overcurrent protection | 700 mA cycle-by-cycle peak current limit protects against short-circuit faults without latch-up |
Applications
| Cellular Telephones | USB-Powered Devices |
|---|---|
Use Scenario: Powering baseband processor core and RF transceiver from single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary 1.2 V synchronous buck regulator delivering stable core voltage with fast transient response. Use Value: Delivers 500 mA at >90% efficiency across full battery discharge curve while maintaining <15 mV ripple via 2 MHz switching. |
Use Scenario: Regulating 5 V USB input down to 1.2 V for microcontroller and sensor subsystems. IC Role / Device Role / Timing Role: Fixed-output step-down converter with integrated PG signal for USB enumeration timing compliance. Use Value: 262 ms PG delay ensures host controller detects stable 1.2 V rail before initiating USB descriptor exchange. |
| Digital Cameras | Portable Computers |
Use Scenario: Supplying image sensor and ISP core logic from 3-cell NiMH pack (3.6–4.5 V). IC Role / Device Role / Timing Role: High-efficiency DC-DC converter with soft-start and UVLO for cold-boot reliability. Use Value: 45 µA quiescent current preserves battery charge during standby; 150 °C thermal shutdown prevents lens motor overheat damage. |
Use Scenario: Generating 1.2 V core voltage for low-power ARM-based SoC in ultra-thin notebook designs. IC Role / Device Role / Timing Role: Compact 3×3 mm DFN buck regulator with thermal pad for conduction cooling in space-constrained layouts. Use Value: 60 °C/W thermal resistance enables 500 mA operation without heatsink in ambient ≤60 °C environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 1.2 V fixed, 500 mA, 3 MHz switching, 17 µA IQ, no PG output | Lacks power-good signaling; requires external reset IC for sequencing-critical systems | Preferred where ultra-low IQ and higher frequency (smaller L/C) outweigh need for PG monitoring |
| RT8059GJ6 | 1.2 V fixed, 600 mA, 2.5 MHz, 25 µA IQ, open-drain PG with 200 ms delay | Higher current rating and faster switching; PG delay differs by 62 ms vs. MCP1602-120I/MF | Selected when margin above 500 mA is needed or tighter PCB area budget allows smaller passive components |
Compared with TPS62231DRYR and RT8059GJ6, the MCP1602-120I/MF offers the only combination of 262 ms PG delay, 45 µA quiescent current, and 2.0 MHz fixed-frequency PWM among these three-making it uniquely suited for legacy Li-ion portable designs requiring precise power-good timing alignment.
Availability
MCP1602-120I/MF is available at Aetrix Electronics and suitable for cellular telephones, USB-powered devices, digital cameras, and portable computers requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MCP1602-120I/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 company specializing in microcontrollers, analog, and power management ICs, with broad industrial, automotive, and consumer design-in support.
The MCP1602 product line delivers highly integrated, low-quiescent-current synchronous buck regulators optimized for battery-powered portable equipment where efficiency, size, and power-good sequencing are critical.
FAQ
What is the operating temperature range for the MCP1602-120I/MF?
The MCP1602-120I/MF is specified for operation from –40 °C to +85 °C ambient temperature, with junction temperature limited to +125 °C under steady-state conditions and +150 °C transient thermal shutdown threshold. Its 3×3 mm DFN package achieves θJA = 60 °C/W on a 4-layer board with thermal vias, enabling reliable 500 mA output in compact portable enclosures.
Does the MCP1602-120I/MF require external compensation components?
No, the MCP1602-120I/MF is internally compensated-no external RC network is needed for stability. This applies specifically to the fixed-output 1.2 V version (MCP1602-120I/MF); adjustable versions require RCOMP = 4.99 kΩ and CCOMP = 33 pF, but those values do not apply to this part number.
How does the power-good (PG) output behave during startup and fault conditions?
The MCP1602-120I/MF PG pin remains low until VOUT reaches 94% of 1.2 V (1.128 V), then asserts high after a 262 ms (typical) delay. If VOUT drops below 92% (1.092 V), PG transitions low within 165 µs. During UVLO or thermal shutdown, PG goes low immediately-providing unambiguous system-level fault indication.
Can the MCP1602-120I/MF operate from a 5 V USB source?
Yes, the MCP1602-120I/MF accepts input voltages from 2.7 V to 5.5 V, making it fully compatible with standard 5 V USB power. At VIN = 5 V and VOUT = 1.2 V, efficiency exceeds 88% at 300 mA load, and the 2.0 MHz switching frequency allows use of miniature 4.7 µH inductors and 4.7 µF ceramic capacitors.
What protection features are built into the MCP1602-120I/MF?
The MCP1602-120I/MF includes undervoltage lockout (2.55 V turn-on with 200 mV hysteresis), cycle-by-cycle overcurrent limiting (700 mA peak), thermal shutdown (150 °C with 10 °C hysteresis), and automatic soft-start. All protections are fully integrated-no external components are required to enable or configure them.
MCP1602-120I/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):
- 1.2V
- 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)
MCP1602-120I/MF FAQ
1.How can I place an order for MCP1602-120I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602-120I/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 MCP1602-120I/MF reliable?
The price and inventory of MCP1602-120I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1602-120I/MF is usually 5 days.
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602-120I/MF?
MCP1602-120I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602-120I/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 MCP1602-120I/MF?
For technical support, including MCP1602-120I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602-120I/MF requirements.
6.How does Aetrix verify that MCP1602-120I/MF is sourced from the original manufacturer or authorized distributors?
All MCP1602-120I/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 MCP1602-120I/MF meets industry standards.
7.What is the process for return or replacement of MCP1602-120I/MF?
All MCP1602-120I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602-120I/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 MCP1602-120I/MF part is unused and in its original packaging.
Return procedure for MCP1602-120I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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