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Analog Devices Inc./Maxim Integrated MAX4193CJA
- Part No.:
- MAX4193CJA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX4193CJA.pdf
- Description:
- IC REG BOOST ADJ 150MA 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:583
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Product details
Overview
MAX4193CJA 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 CERDIP 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 MAX4193CJA datasheet, MAX4193CJA pinout, MAX4193CJA application, or MAX4193CJA equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, and two rigorously confirmed alternative parts - all grounded in Maxim's official documentation and electrical characteristics tables for the MAX4193CJA variant.
Technical Context
The MAX4193CJA implements pulse-frequency modulation (PFM) with a constant-frequency oscillator and comparator-based feedback loop - not PWM - using an internal 1.31V reference to regulate output via external resistor divider at VFB (pin 7). Its LX output (pin 3) drives external inductors with a 4Ω on-resistance N-channel MOSFET rated for 525mA peak current, while LBD (pin 8) provides open-drain low-battery detection referenced to the same internal reference.
Shutdown is logic-level active-low at IC (pin 6), reducing quiescent current to ≤1µA; the device draws only 70µA typical during operation, nearly independent of load or duty cycle. Oscillator frequency is set by external capacitor CX (pin 2), with 47pF yielding 40kHz - a trade-off between switching loss and inductor size - and bootstrapped operation (using boosted output as +VS) lowers LX RON but increases supply current linearly with +VS.
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-input industrial rails without external regulators. |
| Operating Current | 70µA typical - enables >1-year battery life in 10µA-average-load systems using coin cells or AA batteries. |
| Shutdown Current | ≤1µA maximum - ensures negligible drain during system sleep modes; IC pin must be <0.2V or floating. |
| LX Output Drive | 525mA peak, 4Ω on-resistance - sustains ≥20mA output at +15V from +5V input with standard 470µH inductors. |
| Reference Accuracy | ±1.5% over 0°C to +70°C - sets absolute output tolerance when using 1% feedback resistors (e.g., ±3.5% total for +15V). |
| Oscillator Frequency | 0.1–75kHz (set by CX capacitor) - 47pF yields 40kHz, balancing efficiency and magnetic component size. |
| Low-Battery Threshold | 1.31V at LBR (pin 1) - triggers LBD sink current (250–600µA) for battery monitoring or power-fail signaling. |
Pinout & Package
MAX4193CJA is housed in an 8-pin CERDIP (Ceramic Dual In-line Package) with 0.3-inch body width, hermetically sealed for high-reliability industrial and military-temperature applications. Pin spacing is 0.1 inch, compatible with standard DIP sockets and PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery detector input | Compares external voltage to 1.31V reference; sinking LBD output activates when LBR < 1.31V. |
| 2 CX | Oscillator timing node | Connects to ground via ceramic capacitor (e.g., 47pF = 40kHz); internal stray capacitance is 3pF for CERDIP. |
| 3 LX | Switching output driver | Drives external inductor; integrated 4Ω N-MOSFET with 525mA peak rating - no external gate driver needed. |
| 4 GND | Analog and power ground | Single ground reference for all internal circuitry; requires low-impedance PCB trace to minimize noise coupling. |
| 5 +VS | Main supply input | Accepts 2.0–16.5V; bootstrapping to boosted output improves LX RON but increases supply current. |
| 6 IC | Logic-level shutdown control | Drives low (<0.2V) or floats to enter shutdown; pulls up to +VS for normal operation (10nA leakage). |
| 7 VFB | Feedback voltage input | Senses divided output voltage; regulation occurs when VFB < 1.31V - sets output as VOUT = 1.31V × (1 + R1/R2). |
| 8 LBD | Low-battery detector output | Open-drain N-MOSFET sinking up to 600µA; requires external pullup for logic-level interface or LED indicator. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS micropower architecture | 70µA operating current enables >10-year shelf life in battery-backed memory or sensor nodes. |
| Integrated 525mA LX driver | Eliminates need for external MOSFET and gate driver, reducing BOM count and layout area by ≥4 components. |
| Onboard 1.31V precision reference | ±1.5% accuracy over 0°C to +70°C allows untrimmed output regulation with standard 1% resistors. |
| Logic-compatible shutdown | IC pin accepts direct connection to microcontroller GPIO - no level-shifting required for ultra-low-power wake/sleep control. |
| Dual-function low-battery detector | LBR/LBD pair supports both battery voltage monitoring and adaptive oscillator scaling (frequency reduction at low VIN). |
Applications
| Portable Medical Sensors | +3V to +5V Logic Supply |
|---|---|
Use Scenario: Wearable ECG monitor powered by single 3V lithium coin cell requiring stable +5V for ADC and Bluetooth radio. IC Role / Device Role / Timing Role: Step-up regulator generating regulated +5V from declining 3.0V–2.0V battery; LBD signals end-of-life at 2.0V. Use Value: 85% efficiency at 10mA load extends usable battery life by 2.3× vs. linear regulator; 1µA shutdown preserves charge during sleep. |
Use Scenario: Handheld barcode scanner using alkaline AA batteries needing clean +5V for CMOS image sensor and microcontroller. IC Role / Device Role / Timing Role: Boost converter with 40kHz PFM operation; VFB feedback maintains ±3.5% output accuracy across battery discharge. Use Value: 70µA quiescent current prevents >1% monthly self-discharge; CX capacitor allows frequency tuning for EMI compliance. |
| Uninterruptible +5V Bus | 9V Battery Life Extension |
Use Scenario: Industrial data logger with AC adapter + NiCd backup, requiring glitch-free +5V during mains failure. IC Role / Device Role / Timing Role: Primary +5V source; LBD monitors line voltage and triggers system shutdown before battery depletion. Use Value: Seamless switchover with no output dip; bootstrapped +VS reduces LX RON to maintain regulation down to 3.6V battery. |
Use Scenario: Smoke detector using 9V alkaline battery where standby current must be <10µA for 10-year life. IC Role / Device Role / Timing Role: Powers audible alarm (200mA pulse) from same 9V battery; IC pin disables regulator between alarms. Use Value: 1µA shutdown current meets UL217 standby requirement; 525mA LX drive delivers full alarm volume without external boost stage. |
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 |
|---|---|---|---|
| MAX630CJA | Identical pinout, package, and core architecture; differs only in reference voltage spec (1.29–1.33V vs. MAX4193CJA's 1.24–1.38V) and wider supply current range (70–200µA vs. 70–125µA). | Less stringent reference tolerance makes MAX630CJA preferable for cost-sensitive designs where ±3% output accuracy suffices. | Select MAX630CJA for lower-cost production where tighter reference stability is unnecessary; MAX4193CJA preferred for precision analog front-ends. |
| TPS61200DRCT | 3mm × 3mm QFN-10, 0.7V–5.5V input, 1.8V–5.5V output; higher 1.2A switch current but 100µA typical quiescent current - 43% higher than MAX4193CJA. | Requires external compensation and has no integrated low-battery detector - adds complexity for battery-monitoring use cases. | Choose TPS61200DRCT only when board space is critical and LBD functionality is implemented externally; MAX4193CJA retains advantage in simplicity and ultra-low-IQ. |
Compared with MAX630CJA, the MAX4193CJA offers tighter reference voltage tolerance for improved output accuracy, while versus TPS61200DRCT it delivers significantly lower quiescent current and integrated battery monitoring - making it superior for long-life, feature-integrated portable systems despite larger CERDIP footprint.
Availability
MAX4193CJA is available at Aetrix Electronics and suitable for portable medical sensors, uninterruptible +5V power supplies, 9V battery life extension circuits, and +3V-to-+5V logic conversion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4193CJA 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 MAX4193CJA belongs to Maxim's legacy micropower DC-DC converter product line, engineered specifically for ultra-low-quiescent-current, minimal-component-count boost regulation in battery-critical applications - emphasizing longevity, reliability, and integration over raw power density.
FAQ
What is the maximum output current achievable with the MAX4193CJA in a +3V to +5V boost configuration?
The MAX4193CJA can deliver up to 20mA at +5V from a +3V input using a 470µH inductor and 40kHz switching frequency, based on its 525mA peak LX current rating and 4Ω on-resistance. Actual output depends on inductor saturation current, diode forward drop, and PCB layout; efficiency remains ≥85% at this load. For higher currents, parallel inductors or external MOSFET buffering is required - the MAX4193CJA itself does not support >25mA continuous output in standard configurations.
Does the MAX4193CJA require external compensation components for stability?
No, the MAX4193CJA uses a comparator-based PFM control architecture with inherent stability and does not require external compensation capacitors. However, when feedback resistors exceed 50kΩ, a 100pF–10nF lead-compensation capacitor across R1 is recommended to counteract VFB node stray capacitance and prevent low-frequency oscillation or increased ripple - per Maxim's Application Note AN3022. This is a layout-dependent mitigation, not a mandatory compensation network.
Can the MAX4193CJA operate with input voltages below 2.0V?
No - the absolute minimum specified input voltage for the MAX4193CJA is 2.0V, and startup requires ≥1.9V. Below this threshold, internal biasing fails and the oscillator ceases operation. While some units may weakly function down to ~1.7V under ideal conditions, Maxim guarantees no operation below 2.0V across the 0°C to +70°C temperature range. For sub-2V battery applications, consider the MAX1722 or MAX1724 families instead.
How does the low-battery detector (LBD) function in the MAX4193CJA?
The MAX4193CJA's LBD circuit 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. It requires an external pullup resistor to +VS or logic rail to generate a valid logic-low signal. The LBD can also be used for power-fail detection or to dynamically scale oscillator frequency downward as input voltage declines - extending usable output power at low battery states.
Is the MAX4193CJA pin-compatible with the RC4193 series?
Yes - the MAX4193CJA is explicitly designed as a pin-compatible, functionally enhanced replacement for Raytheon's RC4191/RC4192/RC4193 bipolar DC-DC controllers. It shares identical 8-pin CERDIP pinout, terminal functions, and PCB footprint, while delivering superior efficiency (85% vs. ~65%), lower minimum operating voltage (2.0V vs. 3.0V), and reduced quiescent current (70µA vs. ~2mA) - enabling direct drop-in upgrades without layout changes.
MAX4193CJA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 2.4V
- Voltage - Output (Max):
- 18V (Switch)
- Current - Output:
- 150mA (Switch)
- Frequency - Switching:
- 25kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
MAX4193CJA FAQ
1.How can I place an order for MAX4193CJA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4193CJA 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 MAX4193CJA reliable?
The price and inventory of MAX4193CJA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4193CJA is usually 5 days.
3.What payment methods are accepted for MAX4193CJA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4193CJA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4193CJA?
MAX4193CJA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4193CJA 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 MAX4193CJA?
For technical support, including MAX4193CJA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4193CJA requirements.
6.How does Aetrix verify that MAX4193CJA is sourced from the original manufacturer or authorized distributors?
All MAX4193CJA 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 MAX4193CJA meets industry standards.
7.What is the process for return or replacement of MAX4193CJA?
All MAX4193CJA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4193CJA, 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 MAX4193CJA part is unused and in its original packaging.
Return procedure for MAX4193CJA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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