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Microchip Technology MCP1631HV-500E/ST
- Part No.:
- MCP1631HV-500E/ST
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MCP1631HV-500E/ST.pdf
- Description:
- IC REG CTRLR SEPIC 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:197
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Product details
Overview
MCP1631HV-500E/ST from Microchip Technology is a high-voltage, peak-current-mode PWM controller IC designed for intelligent switching battery charger systems. It operates from +3.5V to +16V input, delivers up to 250 mA regulated +5.0V output via integrated LDO, supports programmable switching frequency up to 2 MHz, and integrates error, current-sense (CS), and voltage-sense (VS) amplifiers for multi-chemistry Li-Ion/NiMH/Pb-Acid charging control.
For engineers reviewing the MCP1631HV-500E/ST datasheet, MCP1631HV-500E/ST pinout, MCP1631HV-500E/ST application, or MCP1631HV-500E/ST equivalent, key selection considerations include its HV input range, internal 5.0V/250 mA LDO, shutdown quiescent current of 2.4 µA, peak-current-mode architecture, and compatibility with microcontroller-based adaptive charge algorithms.
Technical Context
The MCP1631HV-500E/ST implements peak-current-mode control with an internal 2 MHz-capable analog PWM comparator, using external oscillator input (OSCIN) to set switching frequency and maximum duty cycle. Its integrated CS amplifier (gain = 10 V/V, offset ≤ ±3.0 mV) and VS amplifier (gain = 1 V/V, rail-to-rail input) enable precise battery voltage and current regulation in SEPIC or buck-boost topologies.
It features a dedicated high-voltage LDO (3.5–16 V input, 5.0 V ±0.4% output, 250 mA max) with 50 ppm/°C tempco and 44 dB PSRR at 100 Hz, plus independent overvoltage protection (1.23 V threshold, 50 mV hysteresis) that terminates PWM within 63 ns. Shutdown mode retains VS amplifier functionality for battery monitoring during discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5 V to +16.0 V - Enables direct connection to 12 V automotive or industrial rails without pre-regulation. |
| LDO Output | +5.0 V ±0.4%, 250 mA - Powers microcontrollers and auxiliary circuitry; dropout ≤ 650 mV at full load. |
| Switching Frequency | Up to 2 MHz - Supports compact magnetics and fast transient response in space-constrained chargers. |
| Shutdown Current | 2.4 µA typical - Minimizes system standby power loss in battery-powered applications. |
| Current Sense Gain | 10 V/V, ±3.0 mV offset - Enables accurate battery current regulation down to sub-100 mA levels. |
| Overvoltage Response | 63 ns delay, 1.23 V threshold - Provides fast, deterministic protection against battery overvoltage faults. |
| Operating Temp | –40°C to +125°C junction - Qualified for under-hood automotive and industrial ambient environments. |
Pinout & Package
Package: 20-Lead TSSOP (4.4 mm × 6.5 mm, 0.65 mm pitch). Pin mapping validated per DS22063B-page 3 and page 15 pin function table for MCP1631HV variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground return | Carries high-peak-switching currents; must connect to low-impedance power ground plane. |
| SHDN (Pin 2) | Active-low shutdown control | Pulls IQ to 2.4 µA; VS amplifier remains active for battery voltage monitoring during sleep. |
| OSCIN (Pin 3) | External oscillator input | Sets switching frequency and max duty cycle; logic low enables VEXT output. |
| OSCDIS (Pin 4) | Asynchronous PWM disable | Terminates VEXT within nanoseconds-used for LED dimming or fault override. |
| OVIN (Pin 5) | Overvoltage sense input | Connects to resistor divider; triggers 50 ns PWM termination if battery exceeds 1.23 V reference. |
| VREF (Pin 6) | External regulation reference | Accepts rail-to-rail input; defines target voltage/current setpoint for closed-loop control. |
| AGND (Pin 7) | Analog ground reference | Separate quiet ground for precision amplifiers; must be star-connected to avoid noise coupling. |
| VIN (Pin 10) | High-voltage input supply | Primary power input (3.5–16 V); powers internal LDO and gate drivers. |
| AVDD_OUT (Pin 11) | Regulated +5.0 V output | Stable 5 V supply for MCU and peripherals; short-circuit protected to 400 mA. |
| VSIN / VSOUT (Pins 12/13) | Battery voltage sense inputs | Differential pair for high-accuracy battery voltage measurement; rail-to-rail input range. |
| ISIN / ISOUT (Pins 14/15) | Battery current sense inputs | Inputs to integrated CS amplifier (10× gain); enables precise constant-current charging control. |
| FB (Pin 16) | Error amplifier feedback | Compares regulated output to VREF; drives COMP pin to adjust duty cycle. |
| CS/VRAMP (Pin 17) | Current sense or ramp input | In MCP1631HV, used as current sense input (CS); not VRAMP (reserved for voltage-mode variants). |
| PVDD (Pin 18) | Power driver supply | Supplies gate driver; connects to VIN or AVDD_OUT depending on topology requirements. |
| VEXT (Pin 19) | External MOSFET gate driver output | Integrated 1 A peak low-side driver; P-channel RDS(on) = 7.2 Ω typ, N-channel = 3.8 Ω typ. |
| COMP (Pin 20) | Error amplifier output | Drives external compensation network; interfaces directly with PWM comparator input. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated +5.0 V / 250 mA LDO | Eliminates need for external bias regulator; supports MCU and sensor power in single-chip charger designs. |
| Peak-current-mode control | Enables inherent cycle-by-cycle current limiting and stable operation across wide input/output ranges. |
| Independent VS and CS amplifiers | Allows simultaneous, high-precision battery voltage and current regulation-critical for CC/CV charging profiles. |
| Sub-100 ns overvoltage shutdown | Guarantees battery safety by terminating PWM before overvoltage can damage cells or cause thermal runaway. |
| 2.4 µA shutdown IQ with active VS monitor | Permits real-time battery state-of-charge tracking during system sleep without compromising energy efficiency. |
Applications
| Multi-Chemistry Battery Charger | USB-Powered Smart Charger |
|---|---|
Use Scenario: Charging Li-Ion, NiMH, and Pb-Acid batteries in portable medical devices with firmware-adaptive charge profiles. IC Role / Device Role / Timing Role: High-voltage PWM controller coordinating with MCU to execute CC/CV stages, temperature-compensated termination, and cell balancing support. Use Value: Single IC supports diverse chemistries without hardware changes; 250 mA LDO powers charging algorithm MCU and fuel gauges. | Use Scenario: Compact wall adapter with USB input that charges 2S/3S Li-Ion packs in power tools or drones. IC Role / Device Role / Timing Role: Primary switching controller implementing SEPIC topology to maintain regulation across varying USB input (4.75–5.25 V) and wide battery voltage range (6–12.6 V). Use Value: 2 MHz capability enables <10 µH inductors; integrated OVP and CS amplifier ensure safe, accurate constant-current delivery from unregulated USB source. |
| LED Constant-Current Driver | Industrial SEPIC Power Supply |
Use Scenario: Programmable LED lighting module with dimming, thermal foldback, and fault reporting in smart building controls. IC Role / Device Role / Timing Role: Analog PWM modulator using OSCDIS for PWM dimming and CS amplifier for precise current regulation across LED string Vf variation. Use Value: Nanosecond OSCDIS response enables flicker-free 10,000:1 dimming ratio; shutdown mode preserves status monitoring at <3 µA. | Use Scenario: 24 V input industrial sensor node requiring isolated 5 V/200 mA output with high line/load regulation in harsh EMI environments. IC Role / Device Role / Timing Role: Core controller in non-isolated SEPIC converter delivering tightly regulated 5 V output from fluctuating 18–32 V DC bus. Use Value: 44 dB PSRR and 8 µV/√Hz noise ensure clean power for ADCs and RF transceivers; –40°C to +125°C rating supports DIN-rail deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1631HV-330E/ST | Same HV controller architecture but configured for +3.3 V / 250 mA LDO output instead of +5.0 V. | Used where system MCU or logic requires 3.3 V bias rather than 5.0 V; identical pinout and control interface. | Select when main system voltage rail is 3.3 V and no level-shifting is desired for MCU interface. |
| LT3757AEMSE#TRPBF | Wide-input (2.9–40 V) current-mode controller with integrated 75 V MOSFET gate drivers; no integrated LDO. | Targets higher-power (>1 A) flyback/boost chargers; requires external bias supply and discrete current sensing. | Choose for >10 W applications needing higher voltage headroom or integrated high-side driver capability. |
Compared with MCP1631HV-330E/ST, the MCP1631HV-500E/ST provides +5.0 V bias ideal for legacy 5 V MCUs and analog circuitry; versus LT3757A, it trades higher integration (on-chip LDO, CS/VS amps) for lower power ceiling (250 mA vs multi-amp), simplifying BOM and layout for sub-2 W intelligent chargers.
Availability
MCP1631HV-500E/ST is available at Aetrix Electronics and suitable for multi-chemistry battery chargers, USB-powered smart charging systems, and industrial SEPIC power supplies requiring stable component supply across design-in, prototyping, and volume production phases.
Supply support for MCP1631HV-500E/ST 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 microcontrollers, analog components, and Flash-IP solutions, serving automotive, industrial, communications, and consumer markets with high-reliability silicon and development tools.
The MCP1631HV product line delivers high-voltage, microcontroller-compatible PWM controllers optimized for intelligent, software-defined battery charging and constant-current power conversion in space- and cost-constrained applications.
FAQ
What is the maximum input voltage supported by the MCP1631HV-500E/ST?
The MCP1631HV-500E/ST supports an absolute maximum input voltage of +18.0 V, with recommended operating range from +3.5 V to +16.0 V. This allows direct connection to 12 V automotive systems or industrial 15 V rails without external pre-regulation, while maintaining full functionality of its integrated +5.0 V LDO and protection circuits.
Does the MCP1631HV-500E/ST include an integrated LDO, and what are its specifications?
Yes, the MCP1631HV-500E/ST integrates a high-voltage LDO delivering +5.0 V ±0.4% with up to 250 mA output current. It features 50 ppm/°C temperature coefficient, 44 dB PSRR at 100 Hz, and 650 mV dropout at full load. The LDO is powered directly from VIN (3.5–16 V), eliminating the need for a separate bias supply in charger designs using the MCP1631HV-500E/ST.
How does the MCP1631HV-500E/ST implement overvoltage protection for battery safety?
The MCP1631HV-500E/ST uses an internal overvoltage comparator with 1.23 V threshold and 50 mV hysteresis on the OVIN pin. When the divided battery voltage exceeds this threshold, the device terminates the VEXT PWM output within 63 ns-fast enough to prevent cell damage during overvoltage events. This hardware-level protection operates independently of the host MCU, ensuring fail-safe behavior.
Can the MCP1631HV-500E/ST be used with different battery chemistries like Li-Ion and Pb-Acid?
Yes, the MCP1631HV-500E/ST is explicitly designed for multi-chemistry battery charging. Its programmable reference input (VREF), independent current-sense (CS) and voltage-sense (VS) amplifiers, and microcontroller interface allow firmware to implement chemistry-specific CC/CV profiles, temperature compensation, and termination criteria for Li-Ion, NiMH, NiCd, and Pb-Acid batteries-all using the same MCP1631HV-500E/ST hardware platform.
What package type is used for the MCP1631HV-500E/ST, and is it RoHS compliant?
The MCP1631HV-500E/ST is supplied in a 20-Lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch), which is lead-free and RoHS compliant per Microchip's standard qualification. This surface-mount package supports automated assembly and provides adequate thermal performance (θJA = 90°C/W on 4-layer board) for typical charger applications up to 2 W output power.
MCP1631HV-500E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Sepic
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3.5V ~ 16V
- Frequency - Switching:
- -
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Ramp
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
MCP1631HV-500E/ST FAQ
1.How can I place an order for MCP1631HV-500E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1631HV-500E/ST 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 MCP1631HV-500E/ST reliable?
The price and inventory of MCP1631HV-500E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1631HV-500E/ST is usually 5 days.
3.What payment methods are accepted for MCP1631HV-500E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1631HV-500E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1631HV-500E/ST?
MCP1631HV-500E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1631HV-500E/ST 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 MCP1631HV-500E/ST?
For technical support, including MCP1631HV-500E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1631HV-500E/ST requirements.
6.How does Aetrix verify that MCP1631HV-500E/ST is sourced from the original manufacturer or authorized distributors?
All MCP1631HV-500E/ST 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 MCP1631HV-500E/ST meets industry standards.
7.What is the process for return or replacement of MCP1631HV-500E/ST?
All MCP1631HV-500E/ST units undergo pre-shipment inspection (PSI). If there is an issue with MCP1631HV-500E/ST, 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 MCP1631HV-500E/ST part is unused and in its original packaging.
Return procedure for MCP1631HV-500E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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