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Microchip Technology MCP1602-120I/MS
- Part No.:
- MCP1602-120I/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1602-120I/MS.pdf
- Description:
- IC REG BUCK 1.2V 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,012
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Product details
Overview
MCP1602-120I/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 switching, 45 µA quiescent current, and integrated power-good (PG) output with 262 ms delay-designed for Li-Ion–powered portable electronics requiring stable low-voltage rail generation.
For engineers reviewing the MCP1602-120I/MS datasheet, MCP1602-120I/MS pinout, MCP1602-120I/MS application, or MCP1602-120I/MS equivalent, key selection criteria include input voltage range (2.7–5.5 V), thermal shutdown threshold (150°C), UVLO hysteresis (200 mV), PFM/PWM auto-transition behavior, and PG threshold accuracy (±2% of VOUT).
Technical Context
The MCP1602-120I/MS implements a fully integrated synchronous buck architecture with internal P- and N-channel MOSFETs (RDS(on) = 450 mΩ each), enabling high efficiency (>90% typical) across load currents from 0.1 mA to 500 mA without external compensation. Its dual-mode operation-2.0 MHz fixed-frequency PWM under heavy load and pulse-skipping PFM at light load-minimizes ripple and quiescent draw simultaneously.
Power-good monitoring uses an open-drain PG output referenced to a 0.8 V internal bandgap, with hysteresis (2% of VOUT) and fixed 262 ms active timeout to prevent false assertions during transients. Protection includes cycle-by-cycle overcurrent limiting (700 mA peak), undervoltage lockout (2.55 V typical, 200 mV hysteresis), and thermal shutdown (150°C typical, 10°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2.5% - eliminates need for external feedback divider and simplifies layout for dedicated low-voltage rails. |
| Max Output Current | 500 mA continuous - supports processor cores, memory, and peripheral ICs in portable systems without external current boosting. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-Ion (fully charged to 4.2 V), USB 5 V, and 3-cell NiMH/NiCd battery stacks. |
| Quiescent Current | 45 µA typical - extends battery life in always-on or standby modes of handheld devices. |
| Switching Frequency | 2.0 MHz ±20% - enables use of small 4.7 µH inductors and 4.7 µF ceramic capacitors, reducing solution footprint. |
| Power-Good Delay | 262 ms typical - ensures system reset controllers receive stable, noise-immune assertion after output regulation is achieved. |
| Thermal Shutdown | 150°C junction temperature - protects against sustained overload or poor PCB thermal design while allowing automatic recovery after cooldown. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch), with exposed pad not present (DFN variant has EP; MSOP does not).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Enable/disable logic input | Active-high control: >45% VIN enables regulator; <15% VIN disables it-supports host MCU-driven power sequencing. |
| 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 1.2 V; requires external pull-up for logic-level interface to reset or supervisor ICs. |
| 4: AGND | Analog ground reference | Must be connected to quiet analog ground plane-separate from noisy PGND to avoid reference coupling errors. |
| 5: VOUT | Fixed-output voltage node | Direct connection to regulated 1.2 V output; no external resistor divider needed-simplifies BOM and layout. |
| 6: VIN | Main power input | Accepts 2.7–5.5 V; requires local 4.7 µF X5R/X7R ceramic capacitor with low ESR to suppress switching transients. |
| 7: LX | Switch node | High-slew-rate connection to inductor; must be routed short and wide to minimize EMI and voltage overshoot. |
| 8: PGND | Power ground return | Carries high di/dt currents from LX path; should connect directly to inductor ground and separate from AGND at single point. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM transition | Enables >90% efficiency at full load and sub-50 µA quiescent draw at light load-no mode-control pins or firmware required. |
| Internally compensated control loop | Eliminates external compensation components (RC network), reducing bill-of-materials and layout complexity for fixed-output variants. |
| Integrated overcurrent protection | 700 mA cycle-by-cycle current limit prevents damage during short-circuit or startup into heavy capacitive loads. |
| Undervoltage lockout with hysteresis | 2.55 V turn-on threshold with 200 mV hysteresis avoids oscillation near battery depletion and improves system reliability. |
| Soft-start circuitry | Controls output ramp rate during enable or VIN rise-limits VOUT overshoot to <5% and prevents inrush-induced brownout. |
Applications
| Cellular Telephones | USB-Powered Devices |
|---|---|
Use Scenario: Powering baseband processor core and RF transceiver from single Li-Ion cell (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary 1.2 V DC-DC converter delivering regulated rail with fast transient response and low noise. Use Value: Enables extended talk time via 45 µA quiescent current and maintains stable operation across battery discharge curve. |
Use Scenario: Generating 1.2 V for microcontroller and sensor subsystem from 5 V USB port. IC Role / Device Role / Timing Role: Step-down regulator with PG output synchronized to USB enumeration timing. Use Value: PG delay (262 ms) ensures clean reset assertion after VBUS stabilization, preventing firmware lockup during hot-plug. |
| Digital Cameras | Portable Computers |
Use Scenario: Supplying image sensor digital core and ISP logic from 3.3 V or 3-cell NiMH source. IC Role / Device Role / Timing Role: High-efficiency buck stage with minimal output ripple (<15 mV) to preserve ADC SNR. Use Value: 2.0 MHz switching allows compact 3.3 mm × 3.3 mm layout footprint-critical for thin camera modules. |
Use Scenario: Providing 1.2 V to embedded controller (EC) or keyboard controller in clamshell notebook designs. IC Role / Device Role / Timing Role: Always-on power rail with SHDN controllable by main CPU for deep-sleep state entry. Use Value: 0.05 µA shutdown current minimizes battery drain during multi-week storage without recharge. |
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 | 1.2 V fixed, 600 mA, 3.0 MHz switching, 22 µA IQ, no PG output | Lacks power-good signal; requires external supervision for reset sequencing | Preferred where higher switching frequency and lower IQ justify absence of PG functionality |
| Analog Devices ADP2301ARMZ-1.2-R7 | 1.2 V fixed, 600 mA, 700 kHz switching, 1.2 mA IQ, no PFM mode, no PG | Higher quiescent current and no light-load efficiency optimization; lacks PG and auto-mode transition | Suitable only for cost-sensitive, non-battery applications where size and efficiency are secondary |
Compared with MCP1602-120I/MS, the TPS62231DRYR offers higher current and lower IQ but omits PG-requiring redesign of reset logic-while the ADP2301ARMZ-1.2-R7 trades efficiency and feature set for lower unit cost in line-powered systems.
Availability
MCP1602-120I/MS 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/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 manufacturer specializing in microcontrollers, analog devices, and power management ICs, with broad industrial and automotive qualification programs.
The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC regulators optimized for battery-powered portable electronics where space, efficiency, and power sequencing reliability are critical.
FAQ
What is the maximum input voltage rating for the MCP1602-120I/MS?
The MCP1602-120I/MS has an absolute maximum input voltage rating of +6.0 V on the VIN pin relative to AGND. However, its operational input range is specified from 2.7 V to 5.5 V. Exceeding 5.5 V may cause functional failure or permanent damage, even if within the absolute maximum rating, due to internal gate oxide stress and thermal limits.
Does the MCP1602-120I/MS require external compensation components?
No, the MCP1602-120I/MS is internally compensated for its fixed 1.2 V output configuration. Unlike adjustable versions that require RCOMP = 4.99 kΩ and CCOMP = 33 pF, the MCP1602-120I/MS integrates all necessary compensation-reducing external part count and eliminating tuning effort for standard deployments.
How does the power-good (PG) output behave during startup and fault conditions?
The MCP1602-120I/MS PG output remains low until VOUT reaches ≥94% of 1.2 V (≥1.128 V), then asserts high after a 262 ms delay. If VOUT falls below 92% of 1.2 V (≤1.104 V), PG transitions low within 165 µs. During UVLO, thermal shutdown, or overcurrent events, PG is actively pulled low-providing unambiguous fault signaling.
Can the MCP1602-120I/MS operate from a 3.3 V input to deliver 1.2 V at 500 mA?
Yes-the MCP1602-120I/MS supports input voltages from 2.7 V to 5.5 V, making 3.3 V a valid and efficient source. At 3.3 V input and 1.2 V/500 mA output, typical efficiency exceeds 88%, with low output ripple (<15 mV) and stable regulation confirmed across -40°C to +85°C ambient.
What is the thermal resistance (θJA) of the MCP1602-120I/MS in its MSOP-8 package?
The MCP1602-120I/MS in the 8-lead MSOP package has a typical junction-to-ambient thermal resistance (θJA) of 211°C/W on a standard 4-layer PCB with internal ground plane. This value assumes proper copper pour and thermal vias under the package body-not the exposed pad (which is absent in MSOP).
MCP1602-120I/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):
- 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
MCP1602-120I/MS FAQ
1.How can I place an order for MCP1602-120I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602-120I/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 MCP1602-120I/MS reliable?
The price and inventory of MCP1602-120I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1602-120I/MS is usually 5 days.
3.What payment methods are accepted for MCP1602-120I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602-120I/MS transactions.
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MCP1602-120I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602-120I/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 MCP1602-120I/MS?
For technical support, including MCP1602-120I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602-120I/MS requirements.
6.How does Aetrix verify that MCP1602-120I/MS is sourced from the original manufacturer or authorized distributors?
All MCP1602-120I/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 MCP1602-120I/MS meets industry standards.
7.What is the process for return or replacement of MCP1602-120I/MS?
All MCP1602-120I/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602-120I/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 MCP1602-120I/MS part is unused and in its original packaging.
Return procedure for MCP1602-120I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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