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Microchip Technology MCP1602T-120I/MS
- Part No.:
- MCP1602T-120I/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1602T-120I/MS.pdf
- Description:
- IC REG BUCK 1.2V 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,759
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Product details
Overview
MCP1602T-120I/MS from Microchip Technology is a fixed-output 1.2 V, 500 mA synchronous buck regulator in MSOP-8 package, featuring 2.0 MHz PWM operation, power-good monitoring with 262 ms delay, and automatic PWM-to-PFM mode transition for battery-powered systems. It operates from 2.7V–5.5V input, delivers >90% typical efficiency, and integrates overtemperature, overcurrent, and UVLO protection - ideal for USB-powered portable devices requiring stable low-voltage rail generation.
For engineers reviewing the MCP1602T-120I/MS datasheet, MCP1602T-120I/MS pinout, MCP1602T-120I/MS application, or MCP1602T-120I/MS equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world design implications for Li-ion/NiMH-powered embedded systems.
Technical Context
The MCP1602T-120I/MS implements a fully integrated synchronous buck topology with internal P-channel (450 mΩ RDS(on)) and N-channel (450 mΩ RDS(on)) MOSFETs, enabling high-efficiency DC-DC conversion without external switches. Its dual-mode control architecture autonomously transitions between 2.0 MHz fixed-frequency PWM (for low-noise, high-load regulation) and pulse-frequency modulation (PFM) at light loads to maintain 45 µA typical quiescent current.
Power-good functionality uses an open-drain PG output with 94% VOUT threshold (±2% hysteresis) and 262 ms active timeout, ensuring reliable system reset sequencing. Protection includes undervoltage lockout (2.55 V nominal, 200 mV hysteresis), thermal shutdown at 150°C (10°C hysteresis), and cycle-by-cycle current limiting at 700 mA peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2.5% - eliminates need for external feedback resistors and simplifies layout for dedicated low-voltage rails. |
| Max Output Current | 500 mA continuous - supports processor cores, sensors, and RF modules in portable electronics 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 for space-constrained designs. |
| Quiescent Current | 45 µA typical - extends battery life in always-on or standby modes of handheld devices powered by single-cell Li-ion. |
| Power-Good Delay | 262 ms typical timeout - prevents premature system wake-up during slow-rising or unstable output conditions after startup. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with 1-cell Li-ion (2.7–4.2 V), 2–3-cell NiMH/NiCd, and regulated 3.3 V/5 V supply rails. |
| Thermal Shutdown | 150°C junction temperature - protects against sustained overload or poor PCB thermal design while allowing automatic recovery after 10°C cooldown. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch), thermally enhanced with exposed pad connected to AGND per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Enable/disable logic input | Active-high control: ≥45% VIN enables regulator; ≤15% VIN disables output and reduces current draw 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 indicator | Sinks current when VOUT drops below 92% of 1.2 V; requires external pull-up for system reset or sequencing logic. |
| 4 - AGND | Analog ground reference | Separate ground node for feedback and reference circuitry; must be tied to quiet analog ground plane, not shared with PGND traces. |
| 5 - VOUT | Fixed-output voltage node | Direct connection to regulated 1.2 V output; no external divider needed - simplifies BOM and improves accuracy vs. adjustable variants. |
| 6 - VIN | Main power input | Accepts 2.7–5.5 V input; requires ≥4.7 µF low-ESR ceramic capacitor placed near pin to suppress switching noise and supply transients. |
| 7 - LX | Switch node | High-slew-rate connection to internal MOSFETs and external inductor; demands shortest possible trace length to minimize EMI and voltage overshoot. |
| 8 - PGND | Power ground return | Carries high-frequency inductor current; must be routed separately from AGND and joined at single point near input capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM mode transition | Enables >90% efficiency across full 0.1–500 mA load range without external control - critical for battery runtime optimization in variable-load applications. |
| Internally compensated control loop | Eliminates need for external compensation components (RC network), reducing component count and layout sensitivity for fixed 1.2 V configuration. |
| Integrated overcurrent protection | 700 mA cycle-by-cycle current limit prevents damage during short-circuit or startup inrush - avoids reliance on external fuses or current-sense ICs. |
| Low shutdown current | 0.05 µA typical - ensures negligible battery drain during deep sleep states in portable medical or IoT edge devices. |
| Undervoltage lockout with hysteresis | 2.55 V turn-on threshold with 200 mV hysteresis prevents oscillation near brown-out conditions caused by source impedance or cable drop. |
Applications
| USB-Powered Peripherals | Portable Medical Sensors |
|---|---|
Use Scenario: Powering BLE modules, USB-C audio adapters, or HID peripherals from 5 V USB bus with strict thermal and size constraints. IC Role / Device Role / Timing Role: Primary 1.2 V LDO-replacement buck regulator delivering clean, efficient power to digital baseband ICs and crystal oscillators. Use Value: 2.0 MHz switching allows <5 mm² total solution size with 4.7 µH inductor and 4.7 µF ceramic caps - meets USB-IF mechanical envelope requirements. |
Use Scenario: Battery-operated glucose meters or pulse oximeters requiring long shelf life and accurate analog front-end biasing. IC Role / Device Role / Timing Role: Main system regulator generating stable 1.2 V for microcontroller core and ADC reference, synchronized to low-power wake cycles. Use Value: 45 µA quiescent current and 0.05 µA shutdown current extend single CR2032 battery life beyond 12 months in intermittent-use configurations. |
| Industrial Handheld Terminals | Wearable Fitness Trackers |
Use Scenario: Ruggedized barcode scanners or RFID readers powered by 3.7 V Li-ion cells with frequent high-current motor/LED bursts. IC Role / Device Role / Timing Role: High-efficiency step-down converter supplying 1.2 V to ARM Cortex-M4 MCU core and secure element during active scanning. Use Value: 500 mA output capability and thermal shutdown at 150°C ensure reliable operation under repeated 500 ms motor drive pulses without derating. |
Use Scenario: Slim wrist-worn devices using 3.7 V Li-ion cells where board area and heat dissipation are severely constrained. IC Role / Device Role / Timing Role: Compact 1.2 V power rail generator for ultra-low-power sensor hub and Bluetooth LE radio subsystem. Use Value: MSOP-8 footprint (3.0 × 4.9 mm) and integrated MOSFETs reduce total solution volume by 40% versus discrete buck + LDO approaches. |
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 | Fixed 1.2 V output, 300 mA max, 3.6 MHz switching, 17 µA IQ - higher frequency but lower current rating and no PG output. | Lacks power-good signaling and thermal shutdown; unsuitable for systems requiring fault reporting or robust overload protection. | Select only if 300 mA load ceiling is sufficient and PG functionality is omitted from system architecture. |
| Analog Devices ADP2301ARMZ-1.2-R7 | Fixed 1.2 V output, 600 mA max, 700 kHz switching, 2.5 mA IQ - lower frequency, higher quiescent current, no automatic PFM mode. | Requires larger inductor/capacitor values; less suitable for battery life-critical applications due to 55× higher IQ than MCP1602T-120I/MS. | Prefer when board-level EMI filtering is prioritized over efficiency, or when legacy 700 kHz design reuse is required. |
Compared with TPS62231DRYR and ADP2301ARMZ-1.2-R7, the MCP1602T-120I/MS uniquely balances 500 mA output, 45 µA quiescent current, integrated PG signaling, and automatic mode transition - making it optimal for space- and battery-limited portable systems demanding both performance and reliability.
Availability
MCP1602T-120I/MS is available at Aetrix Electronics and suitable for USB-powered peripherals, portable medical sensors, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MCP1602T-120I/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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with emphasis on embedded control and energy-efficient solutions.
The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC converters optimized for battery-powered portable electronics - designed to replace discrete buck+LDO combinations with minimal external components and robust protection features.
FAQ
What is the maximum input voltage rating for the MCP1602T-120I/MS?
The MCP1602T-120I/MS has an absolute maximum input voltage rating of +6.0 V applied to the VIN pin relative to AGND. However, its specified operating input range is 2.7 V to 5.5 V. Exceeding 5.5 V may cause permanent damage or unpredictable behavior, even if within the absolute maximum rating - always design within the operational range for guaranteed performance and reliability of the MCP1602T-120I/MS.
Does the MCP1602T-120I/MS require external compensation components?
No, the MCP1602T-120I/MS is internally compensated for its fixed 1.2 V output configuration. Unlike adjustable versions that require an external R-C network (4.99 kΩ + 33 pF), the MCP1602T-120I/MS achieves stable loop response without additional components - reducing BOM cost, PCB area, and design validation effort for the MCP1602T-120I/MS.
How does the power-good (PG) output behave during startup and fault conditions?
The MCP1602T-120I/MS PG pin remains low until VOUT reaches 94% of 1.2 V (1.128 V), then asserts high after a 262 ms timeout. If VOUT falls below 92% (1.104 V), PG transitions low within 165 µs. This behavior ensures clean system reset sequencing and prevents false triggers during transient events - a key timing characteristic of the MCP1602T-120I/MS.
Can the MCP1602T-120I/MS operate from a single-cell Li-ion battery throughout its discharge curve?
Yes - the MCP1602T-120I/MS supports input voltages from 2.7 V to 5.5 V, covering the full usable discharge range of a single-cell Li-ion battery (typically 4.2 V down to 2.7 V). Its UVLO threshold of 2.55 V with 200 mV hysteresis ensures clean startup and shutdown, maintaining regulation and efficiency across the entire battery profile for the MCP1602T-120I/MS.
What thermal performance can be expected from the MCP1602T-120I/MS in MSOP-8 package?
In a typical 4-layer PCB with internal ground plane, the MCP1602T-120I/MS (MSOP-8) exhibits a junction-to-ambient thermal resistance (θJA) of 211°C/W. At 500 mA output into 1.2 V with 3.6 V input (~88% efficiency), power dissipation is ~0.3 W - resulting in ~63°C junction rise above ambient. This confirms safe operation below the +125°C max junction limit, validating thermal integrity of the MCP1602T-120I/MS in standard layouts.
MCP1602T-120I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-MSOP
MCP1602T-120I/MS FAQ
1.How can I place an order for MCP1602T-120I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602T-120I/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 MCP1602T-120I/MS reliable?
The price and inventory of MCP1602T-120I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1602T-120I/MS is usually 5 days.
3.What payment methods are accepted for MCP1602T-120I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602T-120I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602T-120I/MS?
MCP1602T-120I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602T-120I/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 MCP1602T-120I/MS?
For technical support, including MCP1602T-120I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602T-120I/MS requirements.
6.How does Aetrix verify that MCP1602T-120I/MS is sourced from the original manufacturer or authorized distributors?
All MCP1602T-120I/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 MCP1602T-120I/MS meets industry standards.
7.What is the process for return or replacement of MCP1602T-120I/MS?
All MCP1602T-120I/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602T-120I/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 MCP1602T-120I/MS part is unused and in its original packaging.
Return procedure for MCP1602T-120I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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