My Inquiry
My Account
Microchip Technology MCP1642B-30I/MC
- Part No.:
- MCP1642B-30I/MC
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP1642B-30I/MC.pdf
- Description:
- IC REG BOOST 3V 800MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,573
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1642B-30I/MC from Microchip Technology is a synchronous step-up DC-DC converter optimized for single-cell battery-powered systems, delivering fixed 3.0V output with 96% typical efficiency, 1.8A peak switch current limit, and ultra-low 0.65V start-up voltage (at 3.3V VOUT). It integrates N- and P-channel MOSFETs, internal compensation, and true output disconnect during shutdown - enabling reliable power for PIC® MCU supply rails in portable medical sensors and wireless instrumentation.
For engineers reviewing the MCP1642B-30I/MC datasheet, MCP1642B-30I/MC pinout, MCP1642B-30I/MC application, or MCP1642B-30I/MC equivalent, key selection criteria include its 3.0V fixed output, 1 MHz PWM operation with anti-ringing control, Power Good open-drain signal, and compatibility with low-input-voltage chemistries including alkaline, Li-Ion, and NiMH.
Technical Context
The MCP1642B-30I/MC operates as a fixed-frequency (1 MHz), peak-current-mode controlled boost regulator with integrated synchronous rectification and adaptive slope compensation. Its low-voltage start-up logic enables operation from 0.65V input, while internal bias switching ensures stable regulation down to 0.35V after start-up.
True output disconnect is implemented via gate control of the internal P-channel MOSFET, eliminating DC path between VIN and VOUT during shutdown (EN = GND), limiting shutdown current to ≤1 µA without discharging the output capacitor. The device uses an internal 815 kΩ feedback divider for 3.0V regulation and requires no external resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±3%, internally set - eliminates need for external resistor divider and reduces BOM count. |
| Switching Frequency | 1.0 MHz ±15% - enables use of small 4.7 µH inductors and low-ESR ceramic capacitors for compact PCB layout. |
| Peak Switch Current Limit | 1.8A typical - supports ≥600 mA output at 2.4V VIN → 3.3V VOUT and ≥800 mA at 3.3V VIN → 5.0V VOUT (scalable per boost ratio). |
| Start-Up Input Voltage | 0.65V typical (3.3V VOUT, 1 mA load) - allows operation from deeply discharged single-cell alkaline or NiMH batteries. |
| Operating Input Voltage | 0.35V typical after start-up (3.3V VOUT, 1 mA) - sustains regulation through full battery discharge curve without brownout. |
| Shutdown Current | ≤1 µA - preserves battery life in standby modes; true disconnect prevents reverse current flow to input source. |
| Power Good Output | Open-drain, active-low at 90% VOUT with 3% hysteresis - provides deterministic MCU reset or sequencing signal without external comparator. |
Pinout & Package
Package: 8-Lead MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch) with exposed thermal pad (EP) not electrically connected - requires external PCB connection to SGND/PGND plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Logic enable input | Active-high enable threshold = 75% of VIN; <20% VIN disables regulator and activates true output disconnect. |
| 2 NC | No-connect terminal | Not internally bonded - must be left floating or tied to GND; no electrical function. |
| 3 PG | Open-drain Power Good | Sinks current when VOUT falls below 90% of nominal; requires external pull-up to VOUT or system rail. |
| 4 VOUT | Regulated output node | Connects to output capacitor and load; also serves as reference point for internal 3.0V feedback divider. |
| 5 SW | Switch node | High-current path connecting inductor to internal N- and P-channel MOSFETs; handles up to 1.8A peak. |
| 6 PGND | Power ground return | Low-impedance return for high-switching-current paths; must be connected externally to SGND. |
| 7 SGND | Signal ground reference | Reference for error amplifier, VFB comparator, and oscillator; connects externally to PGND at single point. |
| 8 VIN | Input supply | Accepts 0.35–5.5V input; requires ≥4.7 µF local bypass capacitor to minimize ripple and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| True output disconnect | EN = GND fully isolates VOUT from VIN using internal P-MOSFET cutoff - prevents battery drain and output capacitor discharge. |
| Low-noise anti-ringing control | Integrated damping circuit suppresses high-frequency oscillations at SW node during DCM - reduces radiated EMI without external snubbers. |
| Internal compensation | All loop compensation components embedded - eliminates external RC network and simplifies design validation across temperature and load. |
| Inrush current limiting & soft-start | 550 µs soft-start time and current-limited start-up sequence prevent output overshoot and inrush stress on input source and output caps. |
| Overtemperature protection | Thermal shutdown at 150°C with 35°C hysteresis - automatically recovers when die cools, avoiding latch-up failure in thermally constrained enclosures. |
Applications
| Portable Medical Sensors | Wireless Sensor Nodes |
|---|---|
Use Scenario: Battery-powered glucose monitor operating from single AA alkaline cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 3.0V power rail generator for analog front-end and low-power MCU, enabling continuous sensor biasing and data logging. Use Value: 0.65V start-up and 0.35V operating minimum extend usable battery life by >25% compared to conventional boost ICs; true disconnect prevents standby leakage. | Use Scenario: Sub-GHz IoT node powered by CR2032 coin cell transmitting temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Efficient 3.0V supply for RF transceiver and microcontroller during brief active bursts, minimizing quiescent draw between transmissions. Use Value: 1 µA shutdown current and internal compensation reduce total solution size and eliminate tuning effort - critical for space-constrained wearable form factors. |
| PIC® MCU Power Supply | Hand-Held Test Instruments |
Use Scenario: Portable oscilloscope probe powered by single Li-Ion cell requiring stable 3.0V for analog signal conditioning and ADC reference. IC Role / Device Role / Timing Role: Primary regulated rail for precision analog circuitry and digital core, synchronized with MCU wake-up events via EN pin. Use Value: Power Good signal enables deterministic MCU initialization only after VOUT reaches 90% regulation - eliminates boot failures due to slow ramp-up. | Use Scenario: Field-deployable multimeter using two AAA cells, needing clean 3.0V for LCD backlight and measurement ASIC. IC Role / Device Role / Timing Role: Compact, low-noise boost stage replacing discrete charge-pump solutions to meet EN 55022 Class B emissions limits. Use Value: Anti-ringing control and 1 MHz fixed frequency simplify EMI filtering - avoids costly shielding and layout iterations in production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1642D-30I/MC | Same 3.0V fixed output, but implements input-to-output bypass (not true disconnect) in shutdown - allows VOUT to track VIN when EN = GND. | Suitable where load can tolerate unregulated input voltage during sleep (e.g., PIC MCU in deep-sleep mode), but not where output isolation is mandatory. | Select MCP1642D-30I/MC only if input bypass functionality is required; otherwise MCP1642B-30I/MC is preferred for battery longevity. |
| TPS61200DRCT | 3.0V fixed output, 0.3V start-up, but lacks true output disconnect and has higher 2.5 µA shutdown current; uses external compensation. | Acceptable for cost-sensitive designs with less stringent standby current requirements, but requires additional passives and layout area. | Choose TPS61200DRCT only if ultra-low start-up voltage (<0.35V) is prioritized over shutdown isolation and board space. |
Compared with MCP1642D-30I/MC, the MCP1642B-30I/MC provides superior battery preservation via true disconnect, while versus TPS61200DRCT it delivers lower shutdown current, integrated compensation, and better noise control - making it optimal for space- and energy-constrained portable instrumentation.
Availability
MCP1642B-30I/MC is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, PIC® MCU power supplies, and hand-held test instruments requiring stable component supply with guaranteed long-term availability.
Supply support for MCP1642B-30I/MC 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 Inc. is a leading provider of microcontrollers, analog devices, and connectivity solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP1642B/D product line was designed specifically for ultra-low-voltage, high-efficiency boost conversion in single-cell battery applications - emphasizing minimal external components, robust start-up behavior, and seamless integration with Microchip's PIC® MCU ecosystem.
FAQ
What is the minimum input voltage required for MCP1642B-30I/MC to start regulating 3.0V output?
The MCP1642B-30I/MC starts regulating 3.0V output at a typical input voltage of 0.65V (measured with 1 mA resistive load and 3.3V VOUT configuration). For its native 3.0V output, start-up occurs slightly higher - confirmed by characterization curves showing functional start-up down to ~0.7V under light loads. This enables operation from nearly depleted alkaline or NiMH cells.
Does MCP1642B-30I/MC require external feedback resistors to set the 3.0V output?
No. The MCP1642B-30I/MC uses an internal resistor divider (typical value 815 kΩ) to fix the output at 3.0V - pin 2 (VFB) is NC and must remain unconnected. This eliminates external components, reduces BOM cost, and improves light-load efficiency by avoiding divider current loss.
How does the true output disconnect feature work in MCP1642B-30I/MC during shutdown?
When EN is pulled low, MCP1642B-30I/MC turns off both the N-channel boost switch and the P-channel synchronous rectifier, physically breaking the DC conduction path between VIN and VOUT. This prevents reverse current flow and output capacitor discharge - verified by ≤1 µA shutdown current and zero VOUT droop during extended sleep periods.
Can MCP1642B-30I/MC operate with input voltages above 3.0V, such as from a Li-Ion cell?
Yes. MCP1642B-30I/MC accepts input voltages from 0.35V up to 5.5V, and its maximum input rating is limited only by VOUT + margin (per datasheet: VIN ≤ VOUT < 5.5V). With a 3.0V output, inputs up to 5.4V are safe - making it compatible with fully charged Li-Ion (4.2V) and multi-cell configurations when used with appropriate input filtering.
What package type is used for MCP1642B-30I/MC, and is thermal pad connection required?
MCP1642B-30I/MC is supplied in an 8-Lead MSOP package (3.0 mm × 4.9 mm) with an exposed thermal pad (EP). Although EP is not electrically connected internally, it must be soldered to a PCB copper pour tied to SGND/PGND to achieve specified θJA = 211°C/W and ensure reliable operation at full load.
MCP1642B-30I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.65V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP1642B-30I/MC FAQ
1.How can I place an order for MCP1642B-30I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1642B-30I/MC 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 MCP1642B-30I/MC reliable?
The price and inventory of MCP1642B-30I/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1642B-30I/MC is usually 5 days.
3.What payment methods are accepted for MCP1642B-30I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1642B-30I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1642B-30I/MC?
MCP1642B-30I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1642B-30I/MC 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 MCP1642B-30I/MC?
For technical support, including MCP1642B-30I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1642B-30I/MC requirements.
6.How does Aetrix verify that MCP1642B-30I/MC is sourced from the original manufacturer or authorized distributors?
All MCP1642B-30I/MC 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 MCP1642B-30I/MC meets industry standards.
7.What is the process for return or replacement of MCP1642B-30I/MC?
All MCP1642B-30I/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP1642B-30I/MC, 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 MCP1642B-30I/MC part is unused and in its original packaging.
Return procedure for MCP1642B-30I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1642B-30I/MC Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
