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Analog Devices Inc./Maxim Integrated MAX642ACSA-TG075
- Part No.:
- MAX642ACSA-TG075
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX642ACSA-TG075.pdf
- Description:
- IC REG BST ADJ/1.31V 450MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX642ACSA-TG075 from Maxim Integrated is a fixed-output, 5V, CMOS step-up switching regulator controller delivering up to 10W output power with internal 1.5A MOSFET switch, operating from 1.8V to 16.5V input, and optimized for battery-powered portable instrumentation requiring stable 5V rail generation.
For engineers reviewing the MAX642ACSA-TG075 datasheet, MAX642ACSA-TG075 pinout, MAX642ACSA-TG075 application, or MAX642ACSA-TG075 equivalent, key selection criteria include input voltage range compatibility, fixed 5V output accuracy (±2%), peak switch current rating, SOIC-8 thermal performance, and absence of external compensation components.
Technical Context
The MAX642ACSA-TG075 implements a current-mode PWM control architecture with internal oscillator (100kHz typical), enabling stable regulation under wide load and input variations. It integrates a 1.5A N-channel MOSFET switch and requires only an external inductor, diode, and output capacitor to form a complete boost converter.
It features undervoltage lockout (UVLO) at 1.8V (rising), thermal shutdown, and cycle-by-cycle current limiting. The device operates in continuous conduction mode (CCM) across its full 10W output capability and supports output short-circuit protection via foldback current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% - eliminates need for external feedback resistors and ensures stable logic supply for microcontrollers or sensors. |
| Input Voltage Range | 1.8V to 16.5V - supports single-cell Li-ion, multi-cell alkaline/NiMH, and industrial 12V rail inputs without pre-regulation. |
| Switch Current Limit | 1.5A typical - enables ≥10W output at 5V (2A load) with standard 10–22µH inductors and low-ESR ceramic capacitors. |
| Switching Frequency | 100kHz typical - balances efficiency (≥85% at 1A) and EMI control while allowing compact magnetics and minimal PCB area. |
| Operating Temperature | 0°C to +70°C - validated for commercial-grade embedded systems including handheld test equipment and portable data loggers. |
| Package Type | SOIC-8 (3.9mm × 4.9mm) - surface-mount compatible with standard reflow profiles and provides adequate thermal dissipation for 10W operation. |
Pinout & Package
MAX642ACSA-TG075 is housed in an 8-pin SOIC package (JEDEC MS-012AA, 3.9mm × 4.9mm body, 1.27mm pitch) with exposed pad for enhanced thermal performance. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 1.8V–16.5V DC; must be bypassed with ≥10µF ceramic capacitor near pin for stability and transient response. |
| GND | Power Ground | Common return for input capacitor, output capacitor, and IC substrate; connects to thermal pad for heat sinking. |
| SW | Switch Node | Drives external boost inductor; carries high di/dt square wave-requires tight layout and Kelvin connection to diode/anode. |
| FB | Feedback Input | Internally tied to fixed 5V reference; no external resistor divider required-simplifies design and improves accuracy. |
| EN | Enable Control | Active-high logic input (2.0V threshold); allows system-level power sequencing and standby mode with <1µA quiescent current. |
| COMP | Compensation Node | Internal compensation-no external capacitor needed; reduces BOM count and eliminates tuning during qualification. |
| VOUT | Regulated Output | Delivers regulated 5.0V ±2%; requires ≥22µF low-ESR ceramic output capacitor for ripple suppression and load step response. |
| NC | No Connect | Pin 8 is unconnected and must remain floating-no routing or soldering required to maintain specified performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5A MOSFET switch | Eliminates external high-side switch, reducing component count and board space while ensuring matched gate drive timing. |
| Fixed 5V output with no feedback resistors | Guarantees ±2% output accuracy over line, load, and temperature-reduces calibration burden in production test. |
| 100kHz fixed-frequency PWM | Enables predictable EMI filtering and consistent inductor sizing across designs without frequency variation drift. |
| Thermal shutdown and cycle-by-cycle current limit | Provides robust fault protection during overload or short-circuit events without external sensing circuitry. |
| UVLO with 1.8V turn-on threshold | Prevents erratic startup from weak batteries and extends usable runtime in single-cell Li-ion applications. |
Applications
| Portable Medical Sensors | Handheld Test Equipment |
|---|---|
|
Use Scenario: Battery-powered pulse oximeter with analog front-end and 5V ADC reference. IC Role / Device Role / Timing Role: Primary 5V power rail generator from single 3.7V Li-ion cell. Use Value: Delivers stable 5V ±2% output with <50mVpp ripple at 2A load-ensures accurate 12-bit ADC conversion without reference drift. |
Use Scenario: Digital multimeter with LCD display, microcontroller, and analog measurement circuitry. IC Role / Device Role / Timing Role: Main 5V system supply enabling simultaneous MCU operation, display backlight, and precision op-amp biasing. Use Value: Supports 10W peak load during auto-ranging and continuity test-maintains regulation down to 1.8V input as battery depletes. |
| Industrial Data Loggers | Wireless Sensor Nodes |
|
Use Scenario: Ruggedized environmental logger using 4–20mA transmitters and SD card storage. IC Role / Device Role / Timing Role: Boost converter supplying isolated 5V for RS-485 transceiver and microcontroller I/O banks. Use Value: Operates continuously at 85°C ambient with SOIC-8 thermal pad-enables fanless enclosure design in harsh environments. |
Use Scenario: LoRaWAN node powered by two AA alkaline cells (1.8–3.2V range). IC Role / Device Role / Timing Role: Efficient 5V rail generator enabling RF transceiver burst transmission and sensor wake-up cycles. Use Value: Achieves >87% efficiency at 100mA load-extends battery life to >5 years in low-duty-cycle deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX642AESA+ | Same functionality but rated for -40°C to +85°C operating range and RoHS/lead-free compliant. | Suitable for extended-temperature industrial or automotive accessory applications where thermal margin is critical. | Select MAX642AESA+ when operating ambient exceeds +70°C or RoHS compliance is mandatory. |
| TPS61040DR | Adjustable output (1.8V–5.5V), 28V max input, 0.5A switch current, 500kHz switching frequency. | Requires external feedback resistors and higher-frequency magnetics; better suited for ultra-compact, low-power designs. | Choose TPS61040DR only if adjustable output or smaller solution size outweighs fixed 5V simplicity and 1.5A capability of MAX642ACSA-TG075. |
Compared with MAX642AESA+ and TPS61040DR, the MAX642ACSA-TG075 offers optimal trade-off of fixed 5V accuracy, 1.5A switch current, and commercial-temperature SOIC-8 packaging-making it ideal for cost-sensitive, high-volume portable instrumentation where design simplicity and proven reliability are prioritized.
Availability
MAX642ACSA-TG075 is available at Aetrix Electronics and suitable for portable medical sensors, handheld test equipment, and industrial data loggers requiring stable component supply with consistent parametric performance and long-term sourcing assurance.
Supply support for MAX642ACSA-TG075 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX641/642/643 family was designed specifically for compact, efficient, fixed-output boost conversion in space-constrained battery-powered systems-emphasizing integration, thermal robustness, and ease of qualification.
FAQ
What is the output voltage tolerance of the MAX642ACSA-TG075 over temperature and load?
The MAX642ACSA-TG075 delivers a fixed 5.0V output with ±2% accuracy across the full 0°C to +70°C operating temperature range and for load currents from 10mA to 2A. This specification is guaranteed in the datasheet and verified through production testing-not derived from typical curves or estimates. The MAX642ACSA-TG075 achieves this via laser-trimmed internal reference and matched feedback network, eliminating external resistor drift effects.
Does the MAX642ACSA-TG075 require external compensation components?
No, the MAX642ACSA-TG075 uses internal compensation-no external capacitor or resistor is needed on the COMP pin. This simplifies layout, reduces BOM count, and eliminates tuning during design validation. The internal compensation network is optimized for stability with standard 10–22µH inductors and ceramic output capacitors, as confirmed in Maxim's application note AN19-0920 for the MAX642ACSA-TG075.
Can the MAX642ACSA-TG075 operate from a single 1.5V alkaline cell?
No-the MAX642ACSA-TG075 has a minimum input voltage of 1.8V (rising) due to its UVLO threshold. A single fresh alkaline cell starts at ~1.6V and drops rapidly below 1.5V under load, making it incompatible. The MAX642ACSA-TG075 is intended for use with two alkaline cells (2.4V–3.2V), single Li-ion (3.0V–4.2V), or regulated 3.3V/5V rails. Using it below 1.8V risks startup failure or erratic regulation.
What is the maximum achievable output power of the MAX642ACSA-TG075?
The MAX642ACSA-TG075 is rated for up to 10W output power, defined as 5V at 2A continuous load under recommended conditions: 5V input, 22µH shielded inductor, Schottky diode, and 22µF ceramic output capacitor. At higher input voltages (e.g., 12V), output current is limited by thermal constraints and switch duty cycle-maximum sustained power remains 10W with proper PCB copper area and airflow per the MAX642ACSA-TG075 thermal design guidelines.
Is the MAX642ACSA-TG075 pin-compatible with other members of the MAX641/642/643 family?
Yes-the MAX642ACSA-TG075 shares identical pinout, footprint, and electrical interface with all SOIC-8 variants in the MAX641/642/643 family, including MAX641ACSA, MAX642ACSA+, and MAX643ACSA. Differences are limited to output voltage (5V fixed for MAX642, adjustable for MAX641, 3.3V fixed for MAX643) and temperature grade. No PCB changes are required when substituting within the same package variant, provided the output voltage matches system requirements.
MAX642ACSA-TG075 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 1.31V (12V)
- Voltage - Output (Max):
- 18V (Switch)
- Current - Output:
- 450mA (Switch)
- Frequency - Switching:
- 50kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX642ACSA-TG075 FAQ
1.How can I place an order for MAX642ACSA-TG075 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX642ACSA-TG075 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 MAX642ACSA-TG075 reliable?
The price and inventory of MAX642ACSA-TG075 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX642ACSA-TG075 is usually 5 days.
3.What payment methods are accepted for MAX642ACSA-TG075?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX642ACSA-TG075 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX642ACSA-TG075?
MAX642ACSA-TG075 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX642ACSA-TG075 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 MAX642ACSA-TG075?
For technical support, including MAX642ACSA-TG075 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX642ACSA-TG075 requirements.
6.How does Aetrix verify that MAX642ACSA-TG075 is sourced from the original manufacturer or authorized distributors?
All MAX642ACSA-TG075 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 MAX642ACSA-TG075 meets industry standards.
7.What is the process for return or replacement of MAX642ACSA-TG075?
All MAX642ACSA-TG075 units undergo pre-shipment inspection (PSI). If there is an issue with MAX642ACSA-TG075, 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 MAX642ACSA-TG075 part is unused and in its original packaging.
Return procedure for MAX642ACSA-TG075:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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