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Microchip Technology MCP1602T-ADJI/MS
- Part No.:
- MCP1602T-ADJI/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1602T-ADJI/MS.pdf
- Description:
- IC REG BUCK ADJ 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,860
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Product details
Overview
MCP1602T-ADJI/MS from Microchip Technology is a 2.0 MHz, 500 mA synchronous buck regulator with adjustable output voltage (0.8V–4.5V), power-good monitoring, and automatic PWM-to-PFM mode transition. It operates from 2.7V–5.5V input, delivers up to 500 mA continuous output, and targets Li-Ion or multi-cell NiMH/NiCd battery-powered portable equipment requiring high efficiency and low quiescent current.
For engineers reviewing the MCP1602T-ADJI/MS datasheet, MCP1602T-ADJI/MS pinout, MCP1602T-ADJI/MS application, or MCP1602T-ADJI/MS equivalent, key selection considerations include its 45 µA typical quiescent current, 262 ms power-good delay, 0.8 V feedback reference, integrated P/N-channel MOSFETs, and MSOP-8 package compatibility with space-constrained designs.
Technical Context
The MCP1602T-ADJI/MS implements a dual-mode control architecture: fixed-frequency 2.0 MHz PWM under heavy load for low noise and tight regulation, and pulse-skipping PFM at light loads to maintain high efficiency down to microamp-level quiescent draw. Its internal 0.8 V reference and error amplifier enable precise output voltage setting via external resistor divider.
Protection is comprehensive and autonomous: undervoltage lockout (2.55 V typical threshold with 200 mV hysteresis), cycle-by-cycle overcurrent limiting (700 mA typical peak), thermal shutdown (150 °C typical trip with 10 °C hysteresis), and open-drain power-good output with 94% VOUT high-threshold and 262 ms active timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-Ion (fully charged) and 2–3 cell NiMH/NiCd without external LDO pre-regulation. |
| Output Current | Up to 500 mA - sufficient for powering core logic, memory, or RF subsystems in portable devices. |
| Switching Frequency | 2.0 MHz (typical) - enables use of small 4.7 µH inductors and compact ceramic capacitors (e.g., 4.7 µF input/output). |
| Quiescent Current | 45 µA (typical) - extends battery runtime in standby or low-power sleep modes. |
| Feedback Reference | 0.8 V (typical) - sets output voltage via external resistor divider; tolerance not specified over full temperature range. |
| Power-Good Delay | 262 ms (typical) - ensures stable output before asserting system reset or enabling downstream circuitry. |
| RDS(on) (P/N-Ch) | 450 mΩ each (typical) - minimizes conduction loss and improves efficiency at mid-to-high load currents. |
Pinout & Package
Package: 8-Lead MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch), thermally enhanced with exposed pad connected to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Logic-level enable/disable input | Active-high (>45% VIN); pulls device into ultra-low 0.05 µA shutdown state when low. |
| 2 - VCC | Analog bias supply | Internally derived from VIN; powers internal reference, comparators, and control logic. |
| 3 - PG | Open-drain power-good indicator | Sinks current when VOUT ≥ 94% of target; requires external pull-up for logic-level signaling. |
| 4 - AGND | Analog ground reference | Must be isolated from noisy PGND at PCB layout level; connects to thermal pad in MSOP variant. |
| 5 - VFB/VOUT | Feedback input (adjustable) / output sense (fixed) | For MCP1602T-ADJI/MS: connects center of resistor divider; 0.8 V reference sets VOUT = 0.8 × (1 + RTOP/RBOT). |
| 6 - VIN | Main power input | Accepts 2.7–5.5 V; requires local 4.7 µF ceramic decoupling close to pin. |
| 7 - LX | Switch node | Drives external inductor; carries high di/dt current; must be routed short and wide to minimize EMI. |
| 8 - PGND | Power ground return | Carries high-current switching return path; separate from AGND but tied at single point near IC. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM transition | Enables >90% efficiency across 0.1–500 mA load range without external mode control or firmware intervention. |
| Internally compensated control loop | Eliminates need for external compensation network in fixed-output variants; adjustable version requires RCOMP = 4.99 kΩ, CCOMP = 33 pF. |
| Integrated P- and N-channel MOSFETs | Reduces BOM count and board area; eliminates discrete sync rectifier and gate driver complexity. |
| 262 ms power-good timeout | Prevents premature system wake-up during slow-ramping or brown-out recovery conditions. |
| Thermal and overcurrent protection | Auto-restarts after junction cools by ~10 °C; cycle-by-cycle current limit prevents damage during short-circuit events. |
Applications
| Portable Medical Sensors | USB-Powered IoT Edge Nodes |
|---|---|
Use Scenario: Wearable glucose monitor powered by single Li-Ion cell with intermittent Bluetooth LE transmission. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.8 V to MCU and sensor ASIC; PG signal triggers ADC sampling only after rail stabilization. Use Value: 45 µA quiescent current extends battery life beyond 7 days; 2.0 MHz switching avoids interference with 2.4 GHz ISM band. |
Use Scenario: Battery-backed environmental sensor hub drawing power from USB host or CR2032 coin cell. IC Role / Device Role / Timing Role: Dual-input buck converter accepting either 5 V USB or 3 V battery; PG output gates USB enumeration until VOUT reaches 94% of 3.3 V. Use Value: Automatic PWM/PFM mode switching maintains >85% efficiency at 100 µA sleep current and >90% at 200 mA burst transmit load. |
| Industrial Handheld Terminals | Low-Power Camera Modules |
Use Scenario: Ruggedized barcode scanner operating from 3.6 V Li-Ion with backlight and imager subsystems. IC Role / Device Role / Timing Role: Supplies 1.5 V to image processor and 3.3 V to interface logic; UVLO prevents boot failure during battery sag under motor load. Use Value: 500 mA output current supports simultaneous imager activation and display backlight; 200 mV UVLO hysteresis avoids oscillation during transient drops. |
Use Scenario: Embedded camera in smart doorbell with motion-triggered 1080p capture and Wi-Fi upload. IC Role / Device Role / Timing Role: Generates 1.2 V core voltage for SoC and 2.8 V for CMOS image sensor; PG signal synchronizes sensor initialization with power rail readiness. Use Value: Adjustable output allows precise matching to sensor VDD requirements; 700 mA current limit protects against inrush during sensor power-up. |
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 1.8 V output; 3 MHz switching; 25 µA quiescent current; no PG output. | Lacks power-good signaling and adjustable output; better suited for ultra-low-IQ fixed-rail apps where PG is handled externally. | Select if 1.8 V fixed output suffices and PG is unnecessary; avoid if system reset sequencing depends on regulated rail confirmation. |
| Analog Devices ADP2302ARMZ-R7 | Adjustable 0.8–5.5 V output; 600 mA rating; 1.4 MHz switching; includes PG but with 100 ms delay (vs. 262 ms). | Higher current capability and wider VOUT range; shorter PG delay may cause false asserts during line transients. | Choose when >500 mA load or >4.5 V output is required; verify timing margins for reset assertion in noisy environments. |
Compared with TPS62231DRVR and ADP2302ARMZ-R7, the MCP1602T-ADJI/MS uniquely balances adjustable output, integrated PG with long delay for robust sequencing, and proven 2.0 MHz operation in MSOP-8 - making it optimal for portable systems where rail stability confirmation and layout simplicity are critical.
Availability
MCP1602T-ADJI/MS is available at Aetrix Electronics and suitable for portable medical sensors, USB-powered IoT edge nodes, industrial handheld terminals, and low-power camera modules requiring stable component supply and long-term design-in support.
Supply support for MCP1602T-ADJI/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, and power management ICs for embedded control applications.
The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC buck regulators optimized for battery-powered portable electronics where efficiency across wide load ranges and reliable power sequencing are essential.
FAQ
What is the output voltage adjustment range for the MCP1602T-ADJI/MS?
The MCP1602T-ADJI/MS supports an adjustable output voltage range from 0.8 V to 4.5 V, set using an external resistor divider connected to the VFB pin. The internal 0.8 V reference determines the output via VOUT = 0.8 V × (1 + RTOP/RBOT). This range accommodates common logic rails including 1.2 V, 1.8 V, 2.5 V, and 3.3 V without requiring custom fixed-voltage variants. The MCP1602T-ADJI/MS does not support outputs below 0.8 V or above 4.5 V under normal operating conditions.
Does the MCP1602T-ADJI/MS require external compensation components?
Yes, the MCP1602T-ADJI/MS requires external compensation for stable loop operation in adjustable-output configurations. The recommended network is RCOMP = 4.99 kΩ and CCOMP = 33 pF, placed between VFB and AGND. Fixed-output versions of the MCP1602 are internally compensated and do not require these components. The MCP1602T-ADJI/MS datasheet specifies this requirement explicitly for all adjustable variants to ensure phase margin and transient response meet design targets.
What is the function and timing behavior of the PG pin on the MCP1602T-ADJI/MS?
The PG pin on the MCP1602T-ADJI/MS is an open-drain output that signals when the regulated output voltage is within 94% (typical) of its target value. It asserts high (via external pull-up) after a 262 ms timeout once VOUT crosses the rising threshold, and de-asserts low when VOUT falls below 92% (typical) of target. The MCP1602T-ADJI/MS uses this delay to prevent false assertions during startup overshoot or load transients, making it suitable for reliable system reset sequencing.
Can the MCP1602T-ADJI/MS operate from a 2.5 V input source?
No, the MCP1602T-ADJI/MS cannot operate from a 2.5 V input. Its absolute minimum input voltage is 2.7 V, and the datasheet further specifies that VIN must also satisfy VIN ≥ VOUT + 0.5 V. For example, to generate 1.8 V output, VIN must be ≥ 2.3 V - but the 2.7 V lower bound still applies. Attempting to power the MCP1602T-ADJI/MS from 2.5 V will result in UVLO activation and no regulation. The MCP1602T-ADJI/MS is designed for 1-cell Li-Ion (2.7–4.2 V) or 2–3 cell NiMH/NiCd sources.
How does the MCP1602T-ADJI/MS handle thermal overload conditions?
The MCP1602T-ADJI/MS incorporates thermal shutdown protection that disables switching when the junction temperature exceeds 150 °C (typical). Once tripped, the device remains off until the junction cools by approximately 10 °C, then automatically restarts with soft-start reinitialization. This hysteresis prevents thermal cycling. The MCP1602T-ADJI/MS datasheet specifies θJA = 211 °C/W for the MSOP-8 package, meaning proper PCB copper area and thermal vias are essential to sustain 500 mA output continuously without shutdown.
MCP1602T-ADJI/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:
- 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-MSOP
MCP1602T-ADJI/MS FAQ
1.How can I place an order for MCP1602T-ADJI/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602T-ADJI/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-ADJI/MS reliable?
The price and inventory of MCP1602T-ADJI/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-ADJI/MS is usually 5 days.
3.What payment methods are accepted for MCP1602T-ADJI/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602T-ADJI/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602T-ADJI/MS?
MCP1602T-ADJI/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602T-ADJI/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-ADJI/MS?
For technical support, including MCP1602T-ADJI/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602T-ADJI/MS requirements.
6.How does Aetrix verify that MCP1602T-ADJI/MS is sourced from the original manufacturer or authorized distributors?
All MCP1602T-ADJI/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-ADJI/MS meets industry standards.
7.What is the process for return or replacement of MCP1602T-ADJI/MS?
All MCP1602T-ADJI/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602T-ADJI/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-ADJI/MS part is unused and in its original packaging.
Return procedure for MCP1602T-ADJI/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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