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Analog Devices Inc./Maxim Integrated MAX4193EPA
- Part No.:
- MAX4193EPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4193EPA.pdf
- Description:
- IC REG BOOST ADJ 525MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,397
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Product details
Overview
MAX4193EPA from Maxim Integrated is a CMOS micropower step-up switching regulator IC designed for compact, high-efficiency DC-DC conversion in battery-powered systems. It integrates a 1.31V bandgap reference, oscillator, voltage comparator, and 375mA N-channel output MOSFET in an 8-pin PDIP package. Key confirmed parameters include 2.0V–16.5V input range, 70µA typical operating current, 1µA max shutdown current, 525mA peak LX drive capability, and ±1.5% output voltage accuracy - enabling +3V to +5V or +5V to +15V boost conversion in space-constrained portable instrumentation.
For engineers reviewing the MAX4193EPA datasheet, MAX4193EPA pinout, MAX4193EPA application, or MAX4193EPA equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, application-specific implementation insights, and two rigorously confirmed alternative parts - all grounded in Maxim's official documentation and electrical characteristics tables.
Technical Context
The MAX4193EPA implements pulse-frequency modulation (PFM) with a constant-frequency oscillator (0.1–75kHz, set by external CX capacitor), where output regulation is achieved by skipping oscillator cycles when the feedback voltage at VFB exceeds the internal 1.31V reference. Its control loop uses a comparator-not an op-amp-reducing quiescent current and external component count.
It features dual functional blocks: a primary boost regulator with LX pin driving an external inductor via a 4Ω on-resistance N-channel MOSFET (525mA peak), and an independent low-battery detector comparing LBR to the same 1.31V reference, with open-drain LBD output sinking up to 600µA. Shutdown is logic-level active-low at IC pin, reducing supply current to ≤1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.0V to 16.5V - supports single-cell Li-ion, multi-cell alkaline/NiCd, and wide industrial input rails without external LDO pre-regulation. |
| Operating Current | 70µA typical - enables >1-year battery life in 10µA-average-load IoT sensors using coin cells or AA batteries. |
| Shutdown Current | ≤1µA maximum - ensures negligible drain during system sleep modes, critical for always-on monitoring devices. |
| LX Output Drive | 525mA peak, 4Ω on-resistance - directly drives standard off-the-shelf inductors (e.g., 470µH) without external gate drivers or current boosting. |
| Reference Accuracy | ±1.5% over -40°C to +85°C - guarantees stable output voltage across automotive and industrial temperature ranges without trimming. |
| Oscillator Frequency | 0.1–75kHz (set by CX capacitor) - allows trade-off between switching loss (low f) and inductor size (high f); 47pF = 40kHz typical. |
| Low-Battery Threshold | 1.31V ±0.06V at LBR - provides precise, temperature-stable undervoltage warning for battery management without external comparators. |
Pinout & Package
MAX4193EPA is housed in an 8-pin plastic DIP (PDIP) package, rated for -40°C to +85°C operation. Pin assignments are electrically and mechanically identical to the MAX630EPA, with full pin compatibility to Raytheon RC4191/2/3 bipolar regulators.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery detector input | Compares external voltage to internal 1.31V reference; triggers LBD sink when below threshold - used for battery monitoring or power-fail detection. |
| 2 CX | Oscillator timing capacitor node | Connects to ground via ceramic capacitor (e.g., 47pF) to set switching frequency; stray capacitance must be minimized for accuracy. |
| 3 LX | Switching node driver output | Drives external inductor with integrated N-MOSFET; 4Ω on-resistance and 525mA peak rating enable direct interface to standard boost topologies. |
| 4 GND | Analog and power ground | Common return for reference, comparator, oscillator, and LX switch - requires low-impedance PCB connection to minimize noise coupling. |
| 5 +VS | Main supply input | Accepts 2.0V–16.5V; powers all internal circuitry; bootstrapping from boosted output improves LX RON but increases supply current. |
| 6 IC | Logic-level shutdown control | Active-low enable: <0.2V or floating = shutdown (≤1µA IQ); ≥1.3V = normal operation - compatible with CMOS outputs or pull-up resistors. |
| 7 VFB | Feedback voltage input | Monitors resistor divider from output; regulates when VFB < 1.31V - sets output as VOUT = 1.31V × (1 + R1/R2). |
| 8 LBD | Low-battery detector open-drain output | Sinks up to 600µA when LBR < 1.31V - interfaces directly to microcontroller GPIO or LED indicator without pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS micropower architecture | 70µA operating current enables >10-year shelf life in battery-backed memory or RTC circuits with minimal self-discharge impact. |
| Integrated 1.31V bandgap reference | ±1.5% accuracy over full temperature range eliminates need for external precision references in portable medical or sensor modules. |
| Onboard 525mA N-channel MOSFET | 4Ω RON at VGS = 15V reduces conduction loss and removes requirement for discrete power switches in sub-5W designs. |
| Logic-compatible shutdown (IC pin) | Sub-1µA quiescent current in shutdown mode supports ultra-low-power wake-on-event architectures in wearables and remote sensors. |
| Pin compatibility with RC4191/2/3 | Enables drop-in replacement of legacy bipolar regulators in existing designs, delivering 85% efficiency vs. ~65% for RC419x equivalents. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG or glucose monitor powered by CR2032 coin cell (3V), requiring regulated +5V for ADC and BLE radio. IC Role / Device Role / Timing Role: Step-up regulator generating stable +5V from declining battery voltage (3.0V → 2.0V), with LBD signaling end-of-life to host MCU. Use Value: 85% efficiency extends usable battery life from 3 months to >6 months; 70µA quiescent current preserves charge during sleep intervals. |
Use Scenario: Environmental sensor node logging temperature/humidity every 5 minutes, powered by two AA alkaline cells (3V). IC Role / Device Role / Timing Role: Boost converter supplying +5V to microcontroller and SD card interface; IC pin enables MCU-controlled shutdown between readings. Use Value: ≤1µA shutdown current reduces average system current to <1µA, enabling >5-year deployment without battery replacement. |
| Uninterruptible 5V Power Supplies | Industrial Handheld Terminals |
Use Scenario: Embedded controller board with +5V main rail backed by NiCd battery, requiring seamless switchover during AC failure. IC Role / Device Role / Timing Role: Primary +5V regulator sourcing from line or battery; LBD monitors line voltage and asserts fault signal before brownout. Use Value: No output glitches during transfer; regulated +5V maintained down to 2.0V battery input, eliminating need for supercapacitor hold-up. |
Use Scenario: Ruggedized barcode scanner with 3.3V logic and 5V motor driver, powered by removable 7.2V Li-ion pack. IC Role / Device Role / Timing Role: Generates isolated +5V rail for motor interface while sharing ground with 3.3V logic; CX capacitor tuned for low EMI in noisy factory environments. Use Value: Compact 8-pin PDIP footprint fits tight mechanical envelopes; 2.0V–16.5V input accommodates full battery discharge curve without intermediate regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630EPA | Identical pinout, package, and core functionality; differs only in reference voltage tolerance (±1.5% for MAX630 vs. ±1.5% for MAX4193 per datasheet Table 1), with MAX4193 specifying tighter VREF min/max over temp. | MAX630EPA is functionally interchangeable in all boost designs; MAX4193EPA offers marginally improved reference stability at temperature extremes. | Select MAX4193EPA for applications demanding highest reference accuracy over -40°C to +85°C; MAX630EPA remains valid for cost-sensitive volume production where ±1.5% is sufficient. |
| TPS61040DRBT | Higher switching frequency (up to 1MHz), smaller external components, but higher 85µA quiescent current and no integrated low-battery detector. | Requires external voltage monitor for battery warning; better suited for space-constrained consumer electronics than industrial battery-life-critical systems. | Choose TPS61040DRBT when PCB area is constrained and efficiency above 10mA load is prioritized; retain MAX4193EPA when ultra-low IQ, integrated LBD, or legacy RC419x pin compatibility is required. |
Compared with MAX630EPA, MAX4193EPA provides marginally tighter reference voltage specification across temperature, while both share identical pinout and application circuitry; versus TPS61040DRBT, MAX4193EPA trades higher-frequency operation for significantly lower quiescent current and built-in battery monitoring - making it superior for long-duration, low-duty-cycle battery systems.
Availability
MAX4193EPA is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, uninterruptible 5V power supplies, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4193EPA 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, automotive, communications, and computing markets.
The MAX4193EPA belongs to Maxim's micropower DC-DC converter product line, engineered specifically for ultra-low-power, battery-operated systems where efficiency, small size, and integrated functionality - such as low-battery detection and logic-level shutdown - are critical design requirements.
FAQ
What is the operating temperature range for the MAX4193EPA?
The MAX4193EPA is specified for operation from -40°C to +85°C, as indicated by the "E" grade suffix in its ordering code. This extended temperature range makes the MAX4193EPA suitable for industrial and automotive under-hood applications where ambient conditions exceed commercial-grade limits. Electrical characteristics in the datasheet are guaranteed across this full range, including reference voltage accuracy, supply current, and low-battery detector thresholds.
Can the MAX4193EPA replace the RC4191/2/3 in existing designs?
Yes, the MAX4193EPA is explicitly designed as a pin-compatible, functionally enhanced replacement for Raytheon's RC4191, RC4192, and RC4193 bipolar switching regulators. It retains identical pinout and package dimensions while delivering significantly improved efficiency (85% vs. ~65%), lower operating current (70µA vs. several mA), and extended low-voltage operation (down to 2.0V). No PCB changes are required for drop-in substitution.
How does the low-battery detector (LBD) function in the MAX4193EPA?
The MAX4193EPA's low-battery detector compares the voltage at LBR (Pin 1) to its internal 1.31V reference. When LBR falls below this threshold, the open-drain LBD output (Pin 8) sinks up to 600µA, allowing direct connection to a microcontroller GPIO or LED without external pull-up. The detector operates independently of the main regulator, enabling reliable battery monitoring even during shutdown mode.
What is the recommended external inductor value for a +3V to +5V boost application using MAX4193EPA?
For a +3V to +5V boost converter at 40kHz (using 47pF on CX), Maxim recommends a 470µH inductor - such as the Dale IHA-104 (0.5Ω DCR) or TRW LL-500 (0.75Ω DCR) - to deliver ~40mA output with 85% efficiency. Inductor selection must balance peak current handling (≤525mA), DC resistance (to minimize conduction loss), and physical size. Lower inductance increases output current capability but risks exceeding LX current limits.
Does the MAX4193EPA support bootstrapped operation, and what are its benefits?
Yes, the MAX4193EPA supports bootstrapped operation where +VS (Pin 5) is connected to the boosted output rather than the raw input. This raises the gate drive voltage for the internal LX MOSFET, reducing its on-resistance from ~6Ω to ~4Ω and improving efficiency - especially at light loads. However, bootstrapping increases supply current with output voltage, so it is most beneficial in medium-to-high output current applications where conduction loss dominates.
MAX4193EPA 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
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 3.5V
- Voltage - Output (Max):
- 18V (Switch)
- Current - Output:
- 525mA (Switch)
- Frequency - Switching:
- 25kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX4193EPA FAQ
1.How can I place an order for MAX4193EPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4193EPA 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 MAX4193EPA reliable?
The price and inventory of MAX4193EPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4193EPA is usually 5 days.
3.What payment methods are accepted for MAX4193EPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4193EPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4193EPA?
MAX4193EPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4193EPA 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 MAX4193EPA?
For technical support, including MAX4193EPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4193EPA requirements.
6.How does Aetrix verify that MAX4193EPA is sourced from the original manufacturer or authorized distributors?
All MAX4193EPA 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 MAX4193EPA meets industry standards.
7.What is the process for return or replacement of MAX4193EPA?
All MAX4193EPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4193EPA, 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 MAX4193EPA part is unused and in its original packaging.
Return procedure for MAX4193EPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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