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Microchip Technology MCP1602-ADJI/MF
- Part No.:
- MCP1602-ADJI/MF
- Manufacturer:
- Microchip Technology
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MCP1602-ADJI/MF.pdf
- Description:
- IC REG BUCK ADJ 500MA 8DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP1602-ADJI/MF from Microchip Technology is a 2.0 MHz, 500 mA synchronous buck DC-DC regulator with integrated power-good monitoring, designed for space-constrained battery-powered systems. It delivers up to 500 mA output current from a 2.7V–5.5V input, features adjustable output voltage (0.8V–4.5V), 45 µA typical quiescent current, and automatic PWM-to-PFM mode transition-enabling high efficiency in portable computing and USB-powered devices.
For engineers reviewing the MCP1602-ADJI/MF datasheet, MCP1602-ADJI/MF pinout, MCP1602-ADJI/MF application, or MCP1602-ADJI/MF equivalent, key selection considerations include its 8-pin DFN-3x3 package, 0.8V feedback reference, 262 ms power-good delay, thermal shutdown at 150°C, and compatibility with low-ESR ceramic input/output capacitors in compact Li-Ion/NiMH-powered designs.
Technical Context
The MCP1602-ADJI/MF operates as a fully integrated synchronous buck converter with dual-mode control: fixed-frequency 2.0 MHz PWM under heavy load (≤500 mA) for low ripple and noise, and pulse-frequency modulation (PFM) at light loads to maintain ultra-low 45 µA quiescent current. Its internal P-channel and N-channel MOSFETs eliminate external switching components.
Power-good functionality uses an open-drain PG pin with 94% VOUT high-threshold, 92% VOUT low-threshold, and 2% hysteresis, plus a 262 ms active timeout period. Protection includes undervoltage lockout (2.55V typ, 200 mV hysteresis), cycle-by-cycle overcurrent limiting (700 mA peak), and thermal shutdown (150°C, 10°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 500 mA continuous - supports full-power operation in portable processors and USB peripherals without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-Ion (fully charged to 4.2V), two/three-cell NiMH/NiCd, and regulated 3.3V/5V rails. |
| Feedback Reference Voltage | 0.8V ±0.015V - enables precise output regulation from 0.8V to 4.5V using external resistor divider; tolerance directly impacts output accuracy. |
| Switching Frequency | 2.0 MHz (typical, ±0.4 MHz) - allows use of small 4.7 µH inductors and 4.7 µF ceramic capacitors, minimizing PCB footprint. |
| Quiescent Current | 45 µA (typical) - extends battery life in standby/sleep modes of handheld devices without sacrificing startup responsiveness. |
| Power-Good Delay | 262 ms (typical) - ensures stable output before asserting system reset or enabling downstream logic, preventing false power-up sequencing. |
| Thermal Shutdown Threshold | 150°C (typical), with 10°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
The MCP1602-ADJI/MF is housed in an 8-lead 3×3 mm DFN package with exposed thermal pad (EP), optimized for high thermal conductivity on PCBs with AGND-connected vias. The EP must be soldered to AGND for reliable operation above 300 mA.
| 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 filtered VIN rail powering error amplifier, oscillator, and protection circuitry; decoupling capacitor required. |
| 3 PG | Open-drain power-good indicator | Sinks current when VOUT is within 92–94% of target; requires external pull-up for microcontroller reset or status monitoring. |
| 4 AGND | Analog ground reference | Low-noise return for feedback, reference, and error amplifier; must be separated from PGND and tied to EP via vias. |
| 5 VFB/VOUT | Feedback input (adjustable) / output sense (fixed) | Connects to center of resistor divider for adjustable versions; ties directly to VOUT node for fixed-output variants like MCP1602-18I/MF. |
| 6 VIN | Main power input | Accepts 2.7–5.5V; requires ≥4.7 µF low-ESR ceramic capacitor placed near pin to suppress switching transients. |
| 7 LX | Switch node | Drives external buck inductor; carries high di/dt current - trace must be short, wide, and avoid sensitive analog routing. |
| 8 PGND | Power ground return | High-current return path for LX and internal MOSFETs; connects to input/output capacitor grounds and inductor ground. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM mode transition | Eliminates manual mode control; maintains >90% efficiency across 0.1–500 mA load range without compromising transient response. |
| Internally compensated control loop | Removes need for external compensation network in fixed-output configurations; simplifies layout and reduces BOM count. |
| 262 ms power-good assertion delay | Prevents premature system wake-up during output soft-start or line transients; aligns with processor reset timing requirements. |
| Integrated 450 mΩ P- and N-channel MOSFETs | Enables complete 500 mA buck solution with only inductor, input/output caps, and feedback resistors - no external switches required. |
| Undervoltage lockout with 200 mV hysteresis | Prevents erratic startup below 2.55V while avoiding oscillation near threshold due to input source impedance. |
Applications
| Portable Computing Power | USB-Powered Peripherals |
|---|---|
Use Scenario: Powering ARM Cortex-M4 microcontrollers and LPDDR memory in handheld tablets with single-cell Li-Ion battery (3.0–4.2V). IC Role / Device Role / Timing Role: Primary 1.8V/3.3V step-down regulator delivering stable rail with fast load-step response and low-noise PWM operation. Use Value: 2.0 MHz switching enables <5 mm² total solution size; 45 µA quiescent current extends battery runtime in suspend mode by >30% versus 100 µA alternatives. |
Use Scenario: Regulating 5V USB bus down to 3.3V for HID keyboards, Bluetooth dongles, and USB-C accessories. IC Role / Device Role / Timing Role: Compact, self-contained buck converter providing clean, sequenced 3.3V rail with PG signal for host enumeration readiness. Use Value: Fixed 3.3V option eliminates feedback resistors; PG delay ensures firmware initialization completes before USB device enumeration begins. |
| Digital Camera Core Supply | Industrial Sensor Node |
Use Scenario: Supplying image sensor and ISP core logic in battery-operated action cameras with dynamic load profiles (idle: 5 mA, capture: 450 mA). IC Role / Device Role / Timing Role: Adaptive-efficiency regulator transitioning seamlessly between PFM (low-power preview) and PWM (high-speed capture) modes. Use Value: >90% efficiency at 100 mA and 88% at 300 mA minimizes thermal rise in sealed plastic housings; 262 ms PG delay prevents false camera boot failures. |
Use Scenario: Powering ultra-low-power wireless sensor nodes (sub-GHz RF + Cortex-M0+) powered by 2×AA alkaline cells (2.0–3.2V). IC Role / Device Role / Timing Role: Primary 1.8V regulator supporting deep-sleep current <1 µA system-wide, with UVLO preventing brownout resets during battery depletion. Use Value: 0.05 µA shutdown current preserves battery shelf life; 2.7V minimum VIN accommodates full alkaline discharge curve without external booster. |
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 TPS62231DRVR | Fixed 1.8V output only; 3 MHz switching; 20 µA quiescent current; no power-good output. | Lacks PG signaling and adjustable output - unsuitable where system reset coordination or flexible VOUT is required. | Select only if fixed 1.8V and minimal IQ are top priorities and PG is handled externally. |
| Analog Devices ADP2302ARMZ-R7 | Adjustable 0.8–16V output; 600 mA rating; 2.4 MHz switching; requires external compensation; no integrated PG. | Higher VIN max (17V) and IOUT support wider industrial input ranges but adds design complexity and board area. | Choose for higher input voltage or current needs; avoid when compactness, PG integration, or Li-Ion optimization are critical. |
Compared with TPS62231DRVR and ADP2302ARMZ-R7, the MCP1602-ADJI/MF uniquely combines adjustable output, integrated power-good with programmable delay, and optimized 2.7–5.5V operation for battery-centric designs - reducing component count and improving power sequencing reliability without sacrificing efficiency.
Availability
MCP1602-ADJI/MF is available at Aetrix Electronics and suitable for portable computing, USB-powered peripherals, and digital camera power management requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MCP1602-ADJI/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 leading provider of microcontroller, analog, FPGA, and power management semiconductors, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP1602 belongs to Microchip's high-efficiency DC-DC converter product line, engineered specifically for space- and power-constrained portable electronics powered by single-cell Li-Ion or multi-cell NiMH batteries.
FAQ
What is the recommended input capacitor for MCP1602-ADJI/MF?
The MCP1602-ADJI/MF requires a minimum 4.7 µF low-ESR ceramic capacitor (X5R/X7R) placed adjacent to the VIN and PGND pins. This capacitor suppresses high-frequency switching noise and provides local energy storage during load transients. Larger values up to 22 µF improve line regulation but are not required for basic operation. The capacitor's RMS current rating must exceed IOUT × √(VOUT/VIN × (1 − VOUT/VIN)) to ensure reliability.
Does MCP1602-ADJI/MF support adjustable output voltage?
Yes, MCP1602-ADJI/MF is the adjustable-output variant of the MCP1602 family. It uses the VFB pin to sense output voltage via an external resistor divider, enabling regulation from 0.8V to 4.5V. The internal 0.8V reference sets the lower bound, and the top resistor is typically 200 kΩ; the bottom resistor is calculated as RBOT = RTOP × (0.8V / (VOUT − 0.8V)). Compensation components (RCOMP = 4.99 kΩ, CCOMP = 33 pF) are required for stability.
What is the function of the PG pin on MCP1602-ADJI/MF?
The PG (Power-Good) pin on MCP1602-ADJI/MF is an open-drain output that signals when the regulated output voltage is within 92–94% of its target value. It asserts after a 262 ms delay once VOUT rises above the high threshold and de-asserts within 165 µs when VOUT falls below the low threshold. An external pull-up resistor is required to interface with microcontroller reset or enable inputs, ensuring safe system power sequencing.
How does MCP1602-ADJI/MF handle thermal overload?
MCP1602-ADJI/MF incorporates thermal shutdown circuitry that disables the regulator when junction temperature exceeds 150°C (typical), with a 10°C hysteresis. Upon shutdown, the device halts switching, clears soft-start, and remains off until temperature drops below ~140°C. Recovery is automatic and does not require cycling SHDN. For reliable operation, the DFN package's exposed pad must be soldered to AGND with ≥4 thermal vias to limit θJA to 60°C/W on a 4-layer board.
Can MCP1602-ADJI/MF operate from a 2.5V input source?
No, MCP1602-ADJI/MF cannot operate from a 2.5V input. Its absolute minimum input voltage is 2.7V per datasheet specifications, and the UVLO threshold is 2.55V (typical) with 200 mV hysteresis. Operating below 2.7V risks failure to start or unstable regulation. Additionally, the input must satisfy VIN ≥ VOUT + 0.5V - so for a 1.8V output, VIN must be ≥2.3V, but the 2.7V system-level minimum still governs.
MCP1602-ADJI/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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 4.5V
- 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-ADJI/MF FAQ
1.How can I place an order for MCP1602-ADJI/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602-ADJI/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-ADJI/MF reliable?
The price and inventory of MCP1602-ADJI/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-ADJI/MF is usually 5 days.
3.What payment methods are accepted for MCP1602-ADJI/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602-ADJI/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602-ADJI/MF?
MCP1602-ADJI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602-ADJI/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-ADJI/MF?
For technical support, including MCP1602-ADJI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602-ADJI/MF requirements.
6.How does Aetrix verify that MCP1602-ADJI/MF is sourced from the original manufacturer or authorized distributors?
All MCP1602-ADJI/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-ADJI/MF meets industry standards.
7.What is the process for return or replacement of MCP1602-ADJI/MF?
All MCP1602-ADJI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602-ADJI/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-ADJI/MF part is unused and in its original packaging.
Return procedure for MCP1602-ADJI/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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