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Analog Devices Inc./Maxim Integrated MAX603EPA
- Part No.:
- MAX603EPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX603EPA.pdf
- Description:
- IC REG LIN POS ADJ 500MA 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
The MAX603EPA from Maxim Integrated is a -40°C to +85°C industrial-grade, 5V fixed-output, low-dropout linear regulator with P-channel MOSFET pass transistor, 500mA output capability, 320mV dropout at 5V/500mA, and 15μA typical quiescent current-designed for battery-powered instrumentation and portable 5V logic supply rails.
For engineers reviewing the MAX603EPA datasheet, MAX603EPA pinout, MAX603EPA application, or MAX603EPA equivalent, this page delivers verified electrical parameters, thermal behavior under load, Dual Mode™ configuration options, reverse-current protection threshold, and real-world transient response data critical for low-power embedded power design.
Technical Context
The MAX603EPA implements a 1.20V bandgap reference, error amplifier, MOSFET driver, and dual-mode comparator to regulate output via internal feedback (5V fixed) or external resistor network (1.25V–11V adjustable). Its P-channel pass transistor eliminates base-drive current, enabling stable 15μA IQ across load and temperature.
Shutdown is active-low on the OFF pin with 2μA off-mode current; reverse-current protection activates when VIN falls 6–20mV below VOUT, limiting reverse leakage to ≤10μA. Foldback current limiting provides 350mA short-circuit protection and 1.2A limit above 0.8V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.00V ±2.5% (4.75V–5.25V) at 20μA–500mA load; tightly trimmed for 5V logic rail compliance. |
| Dropout Voltage | 320mV typ at 5V/500mA; enables operation down to 5.32V input-critical for end-of-life alkaline or Li-ion battery use. |
| Quiescent Current | 15μA typ / 35μA max over -40°C to +85°C; sustains ultra-low standby power in always-on sensor nodes. |
| Shutdown Current | 2μA max in OFF mode; reduces system sleep power to sub-microwatt levels. |
| Reverse-Current Threshold | 6–20mV (VOUT – VIN); prevents backup battery discharge when main supply fails. |
| Thermal Shutdown | 160°C activation with 10°C hysteresis; enables self-recovering fault handling without external supervision. |
| Input Voltage Range | 2.7V to 11.5V; supports wide-input battery stacks, USB, and unregulated DC sources. |
Pinout & Package
MAX603EPA uses an 8-pin plastic DIP package (0.300" wide), with GND pins (2,3,6,7) serving as thermal conduction paths. All GND pins must be soldered to large copper areas for reliable 1.8W power dissipation at elevated ambient temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts 2.7V–11.5V supply; dropout behavior defined relative to this node. |
| 2,3,6,7 GND | Ground / Thermal Sink | Four dedicated ground terminals; mandatory connection to PCB ground plane for thermal management and noise immunity. |
| 4 OFF | Active-Low Shutdown Control | Pulls regulator into 2μA off-state; VIH ≥2.0V (VIN=4V) to 4.0V (VIN=11.5V); fast <1μs switching required. |
| 5 SET | Feedback Selection Node | Connect to GND for 5V fixed mode; connect to resistor divider for adjustable output; 80mV threshold selects internal vs. external feedback. |
| 8 OUT | Regulated Output | Delivers up to 500mA at 5V; requires 10μF output capacitor for stability and transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Operation | Single IC supports both factory-trimmed 5V output and user-adjustable 1.25V–11V via external resistors-reducing BOM count and layout variants. |
| P-Channel Pass Transistor | Eliminates base-drive current loss; maintains 15μA quiescent current independent of load-enabling >10-year battery life in low-duty-cycle IoT sensors. |
| Reverse-Current Protection | Automatically disconnects IN from OUT when VIN drops below VOUT by 6–20mV-preserving backup power integrity in dual-supply systems. |
| Foldback Current Limiting | Reduces short-circuit current to 350mA below 0.8V output, preventing thermal runaway during sustained faults without external circuitry. |
| Thermal Overload Protection | Shuts down at 160°C junction temperature and auto-restarts after 10°C cooldown-providing robust, maintenance-free fault recovery. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Wearable ECG monitor powered by two AA alkaline cells (1.8V–3.2V per cell), requiring stable 5V for microcontroller and analog front-end. IC Role / Device Role / Timing Role: Primary 5V LDO regulator delivering regulated rail with <320mV dropout to extend usable battery life to endpoint voltage. Use Value: 15μA quiescent current minimizes standby drain; reverse-current protection prevents backfeed into depleted cells during multi-battery switchover. |
Use Scenario: Ruggedized environmental logger operating in -40°C to +85°C outdoor enclosures, powered by solar-charged LiFePO₄ battery (2.5V–3.6V). IC Role / Device Role / Timing Role: Fixed 5V regulator supplying MCU, SD card interface, and precision ADC-maintaining regulation across wide temperature and input range. Use Value: Guaranteed -40°C to +85°C operation (E-grade); thermal shutdown with hysteresis prevents lockup during solar-heated enclosure events. |
| Wireless Sensor Nodes | Programmable Logic Controllers (PLC) I/O Modules |
Use Scenario: LoRaWAN node with intermittent RF transmission, spending >99% time in deep-sleep mode drawing <10μA. IC Role / Device Role / Timing Role: Always-on 5V supply enabling instant wake-up; OFF pin synchronized to MCU GPIO for zero-power sleep state. Use Value: 2μA shutdown current ensures total system sleep current remains sub-μA; fast 200μs startup time meets real-time wake requirements. |
Use Scenario: DIN-rail mounted PLC module accepting 12–24V DC input, powering isolated 5V digital I/O circuits and fieldbus transceivers. IC Role / Device Role / Timing Role: Secondary local 5V regulator downstream of primary DC-DC converter-filtering ripple and providing fault-isolated rail. Use Value: 80dB PSRR at low frequencies suppresses switching noise; foldback current limiting protects against field-wiring shorts without fuse replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5V LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1763CS8-5#PBF | 20μA IQ, 300mV dropout at 500mA, SO-8 only, no reverse-current protection | Higher PSRR (70dB @ 120Hz), better noise performance, but lacks reverse-current blocking for backup power schemes | Select when ultra-low noise and high PSRR outweigh need for reverse-current isolation in single-supply systems. |
| TPS7A1633DRBR | Only 3.3V fixed output; 17μA IQ, 220mV dropout at 150mA, 500mA rated but derated above 150mA | Optimized for 3.3V logic; not pin-compatible or functionally equivalent for 5V applications | Use only if redesigning for 3.3V core logic; MAX603EPA remains sole direct 5V fixed-option in its thermal and quiescent class. |
Compared with LT1763CS8-5#PBF and TPS7A1633DRBR, the MAX603EPA uniquely combines industrial temperature grade, true 500mA 5V regulation, reverse-current blocking, and DIP package availability-making it irreplaceable in legacy-reliant, thermally demanding, or dual-supply 5V systems.
Availability
MAX603EPA is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, wireless sensor nodes, and PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX603EPA 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) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications-with emphasis on reliability, integration, and low-power innovation.
The MAX603EPA belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-constrained and thermally challenging environments where quiescent current, dropout voltage, and fault resilience are non-negotiable.
FAQ
What is the guaranteed output voltage tolerance for MAX603EPA over temperature?
The MAX603EPA guarantees 4.75V to 5.25V (±2.5%) over its full -40°C to +85°C operating range, with typical output drift of <0.01%/°C. This specification is validated per Electrical Characteristics table in the official datasheet, ensuring compatibility with 5V TTL and CMOS logic families across industrial environments.
Can MAX603EPA be used in adjustable-output mode, and what is the minimum output voltage achievable?
Yes, the MAX603EPA supports adjustable output from 1.25V to 11V using external resistors on the SET pin, leveraging its 1.20V internal reference. The minimum output is set by VOUT = 1.20V × (1 + R1/R2); with R2 = 10kΩ and R1 = 0Ω, VOUT = 1.20V-but practical minimum is 1.25V due to reference tolerance and layout effects. MAX603EPA must have SET tied to GND for fixed 5V operation.
Does MAX603EPA require output capacitance, and what happens if COUT < 3.3μF is used?
Yes, MAX603EPA requires ≥10μF output capacitance for stable operation across temperature and load. Using <3.3μF risks oscillation due to phase margin degradation-verified in Typical Operating Characteristics. Ceramic or tantalum capacitors with ≤100mΩ ESR are recommended; aluminum electrolytics must meet ripple current ratings for 500mA loads.
How does reverse-current protection behave during input brownout in MAX603EPA?
When VIN falls 6–20mV below VOUT, MAX603EPA's internal substrate switch isolates IN from OUT, limiting reverse leakage to ≤10μA. This preserves backup battery charge or secondary supply integrity. The protection activates within microseconds and remains engaged until VIN exceeds VOUT by threshold margin-no external diode needed.
Is MAX603EPA pin-compatible with other members of the MAX603/MAX604 family, such as MAX603CPA or MAX603ESA?
Yes, all MAX603 variants-including MAX603EPA, MAX603CPA, and MAX603ESA-share identical 8-pin DIP or SO pinouts and electrical functionality. Only temperature grade (-40°C to +85°C for E-grade) and package type differ; MAX603EPA in plastic DIP is mechanically and electrically interchangeable with MAX603CPA in same package, pending thermal validation.
MAX603EPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 11.5V
- Voltage - Output (Min/Fixed):
- 1.25V (5V)
- Voltage - Output (Max):
- 11V
- Voltage Dropout (Max):
- 0.55V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 35 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX603EPA FAQ
1.How can I place an order for MAX603EPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX603EPA 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 MAX603EPA reliable?
The price and inventory of MAX603EPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX603EPA is usually 5 days.
3.What payment methods are accepted for MAX603EPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX603EPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX603EPA?
MAX603EPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX603EPA 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 MAX603EPA?
For technical support, including MAX603EPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX603EPA requirements.
6.How does Aetrix verify that MAX603EPA is sourced from the original manufacturer or authorized distributors?
All MAX603EPA 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 MAX603EPA meets industry standards.
7.What is the process for return or replacement of MAX603EPA?
All MAX603EPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX603EPA, 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 MAX603EPA part is unused and in its original packaging.
Return procedure for MAX603EPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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