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Analog Devices Inc./Maxim Integrated MAX4193CPA+
- Part No.:
- MAX4193CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4193CPA+.pdf
- Description:
- IC REG BOOST ADJ 525MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,654
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Product details
Overview
MAX4193CPA+ 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, operating from 2.0V to 16.5V with 70µA typical supply current and 85% typical efficiency - used in +3V to +5V and +5V to +15V converters.
For engineers reviewing the MAX4193CPA+ datasheet, MAX4193CPA+ pinout, MAX4193CPA+ application, or MAX4193CPA+ equivalent, key selection considerations include its 525mA peak LX drive capability, low-battery detection (LBR/LBD), logic-level shutdown (IC pin), bootstrapped operation support, and compatibility with RC4191/2/3 bipolar regulators.
Technical Context
The MAX4193CPA+ implements pulse-frequency modulation (PFM) with a constant-frequency oscillator and comparator-based feedback - not PWM - enabling ultra-low quiescent current. Its internal 1.31V reference sets output voltage via external resistor divider at VFB, while LBR input enables programmable low-battery detection referenced to the same internal reference.
It features an integrated N-channel MOSFET output stage (LX pin) with 4Ω typical on-resistance and 525mA peak current rating, driven directly without base/gate current overhead. Shutdown is controlled by IC pin (pin 6), reducing supply current to ≤1µA when pulled below 0.2V or left floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports single-cell Li-ion, multi-cell alkaline/NiCd, and wide-input industrial rails. |
| Typical Operating Current | 70µA - enables >1-year battery life in low-duty-cycle sensor nodes powered by coin cells. |
| Shutdown Quiescent Current | ≤1µA - ensures minimal drain during system sleep modes. |
| LX Output Peak Current | 525mA - delivers up to ~21mA at +15V from +5V input using standard 470µH inductor. |
| Internal Reference Voltage | 1.31V ±0.06V - sets output accuracy and low-battery threshold with matched temperature drift. |
| Oscillator Frequency Range | 0.1kHz to 75kHz - set externally via CX capacitor (e.g., 47pF = 40kHz); lower frequencies improve power at reduced input voltage. |
| Efficiency (typ) | 85% - achieved with optimized inductor and Schottky diode, exceeding bipolar alternatives like RC4193. |
Pinout & Package
MAX4193CPA+ is housed in an 8-pin plastic dual in-line package (PDIP), 0.300" wide, with through-hole mounting and industry-standard pin spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery detector input | Compares external voltage to 1.31V reference; triggers LBD sink when below threshold - used for battery monitoring or power-fail detection. |
| 2 CX | Oscillator timing node | Connects to ground via ceramic capacitor (e.g., 47pF) to set switching frequency - no precision required; tolerance affects only ripple/noise trade-off. |
| 3 LX | Switching output driver | Drives external inductor with integrated 4Ω N-MOSFET; peak current limited to 525mA - requires catch diode (e.g., 1N4148 or 1N5817) and proper PCB layout for thermal management. |
| 4 GND | Analog and power ground | Common return for all internal circuits and external components - must be low-impedance path to minimize noise coupling into VFB/LBR. |
| 5 +VS | Main supply input | Accepts 2.0V–16.5V; can be bootstrapped from output for improved LX RON, or tied directly to input for lowest IQ. |
| 6 IC | Logic-level shutdown control | Drives device into <1µA shutdown when ≤0.2V or floating; pull high to +VS for normal operation - enables system-level power sequencing. |
| 7 VFB | Feedback voltage input | Senses resistive divider output; regulates when voltage falls below 1.31V - sets output as VOUT = 1.31V × (1 + R1/R2). |
| 8 LBD | Open-drain low-battery output | Sinks up to 600µA when LBR < 1.31V - drives LED, microcontroller interrupt, or enable pin of secondary circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS micropower architecture | 70µA operating current enables >10-year shelf life in always-on remote sensors using CR2032 batteries. |
| Integrated 525mA N-MOSFET switch | Eliminates external transistor and base-drive circuitry - reduces BOM count and PCB area vs. discrete boost controllers. |
| Dual comparator function (VFB + LBR) | Shares same 1.31V reference for consistent threshold tracking across temperature - simplifies dual-voltage monitoring without extra references. |
| RC4191/2/3 pin compatibility | Direct drop-in replacement for legacy Raytheon bipolar regulators - retains existing PCB layout while improving efficiency and low-VIN operation. |
| Bootstrappable +VS supply | Allows +VS to be connected to boosted output, lowering LX RON to ~3Ω and increasing available output power without external charge pump. |
Applications
| Portable Medical Sensors | +3V to +5V Logic Supply |
|---|---|
Use Scenario: Wearable ECG monitor powered by single 3V lithium coin cell requiring regulated +5V for ADC and Bluetooth radio. IC Role / Device Role / Timing Role: Step-up regulator providing stable +5V rail; LBD monitors battery voltage to trigger low-power mode before cutoff. Use Value: 85% efficiency extends usable battery life to >6 months; 70µA quiescent current preserves charge during sleep intervals between measurements. | Use Scenario: Handheld barcode scanner using 3V alkaline batteries to power 5V microcontroller and laser driver. IC Role / Device Role / Timing Role: Primary DC-DC converter generating +5V from declining battery input; IC pin enables software-controlled shutdown during idle. Use Value: Supports full-load operation down to 2.0V input; optional CX-based frequency reduction maintains output power as battery depletes. |
| Uninterruptible +5V Bus | 9V Battery Life Extension |
Use Scenario: Industrial data logger with AC adapter and backup NiCd battery, requiring glitch-free +5V during mains failure. IC Role / Device Role / Timing Role: Seamless switchover regulator; LBD signals power loss to MCU for graceful shutdown and data save. Use Value: No output droop or spike during transfer; continuous regulation eliminates need for large hold-up capacitors. | Use Scenario: Legacy instrumentation using 9V alkaline battery, where runtime is limited by inefficient linear regulation. IC Role / Device Role / Timing Role: Replaces 78L05 linear regulator with efficient switching topology; LBD alerts user before battery exhaustion. Use Value: Doubles operational time versus linear solution; 85% efficiency reduces heat generation in enclosed enclosures. |
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 |
|---|---|---|---|
| MAX630CPA+ | Identical pinout, same 1.31V reference and LBD functionality; ±1.5% output voltage accuracy specified (vs. not specified for MAX4193CPA+). | Optimized for fixed-output +5V/+12V/+15V designs with fewer external components; less flexible for custom VOUT. | Select MAX630CPA+ if output voltage is fixed and accuracy tighter tolerance is required; otherwise MAX4193CPA+ offers broader design flexibility. |
| RC4193 | Bipolar implementation; higher 2mA base drive current, lower efficiency (~65%), minimum 3V start-up, no integrated LBD output. | Legacy replacement only; requires redesign of gate/base drive and external low-battery circuitry. | Use RC4193 only for exact form-fit-function replacement in obsolete systems; MAX4193CPA+ provides superior performance and integration. |
Compared with MAX630CPA+, MAX4193CPA+ trades guaranteed output accuracy for greater feedback flexibility and identical low-power operation; compared with RC4193, it delivers 20% higher efficiency, 30× lower quiescent current, and integrated low-battery detection - making it suitable for modern ultra-low-power designs without layout changes.
Availability
MAX4193CPA+ 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 industrial and consumer production programs.
Supply support for MAX4193CPA+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX4193CPA+ belongs to Maxim's micropower DC-DC converter product line, engineered specifically for battery-constrained applications demanding high efficiency, ultra-low quiescent current, and integrated protection features - not general-purpose power conversion.
FAQ
What is the maximum output power achievable with the MAX4193CPA+?
The MAX4193CPA+ delivers up to ~315mW total output power in a +5V-to-+15V configuration (e.g., 21mA at +15V), based on its 525mA peak LX current, 4Ω typical on-resistance, and 40kHz switching frequency with a 470µH inductor. Actual power depends on input voltage, inductor DCR, diode losses, and PCB layout - measured data shows 85% efficiency at 150mW load.
Can the MAX4193CPA+ operate from a single 1.5V alkaline cell?
No - the MAX4193CPA+ has a minimum operating supply voltage of 2.0V per datasheet specifications. While startup may occur near 1.9V, reliable regulation is not guaranteed below 2.0V. For 1.5V operation, consider the MAX660 or MAX680 charge-pump families, or use two cells in series.
How does the low-battery detector (LBD) function in the MAX4193CPA+?
The MAX4193CPA+ LBD output is an open-drain N-channel MOSFET that sinks up to 600µA when the voltage at LBR (pin 1) falls below the internal 1.31V reference. It shares the same reference as VFB, ensuring matched temperature drift. LBD requires an external pullup resistor to define logic-high level and drive loads such as LEDs or MCU interrupts.
Is the MAX4193CPA+ pin-compatible with the RC4193?
Yes - the MAX4193CPA+ is explicitly designed as a pin-compatible, direct replacement for the Raytheon RC4193 bipolar regulator. Pin assignments, footprint, and basic functionality match exactly, enabling drop-in upgrades that improve efficiency, reduce quiescent current, and add integrated low-battery detection without PCB modification.
What external components are mandatory for basic operation of the MAX4193CPA+?
Four components are mandatory: (1) an inductor (e.g., 470µH) between LX and output, (2) a catch diode (e.g., 1N4148 or 1N5817) from LX to output, (3) a feedback resistor divider (R1/R2) from output to VFB to ground, and (4) an oscillator capacitor (e.g., 47pF) from CX to ground. Optional but recommended: input bypass capacitor and LBD pullup resistor.
MAX4193CPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX4193CPA+ FAQ
1.How can I place an order for MAX4193CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4193CPA+ 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 MAX4193CPA+ reliable?
The price and inventory of MAX4193CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4193CPA+ is usually 5 days.
3.What payment methods are accepted for MAX4193CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4193CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4193CPA+?
MAX4193CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4193CPA+ 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 MAX4193CPA+?
For technical support, including MAX4193CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4193CPA+ requirements.
6.How does Aetrix verify that MAX4193CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX4193CPA+ 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 MAX4193CPA+ meets industry standards.
7.What is the process for return or replacement of MAX4193CPA+?
All MAX4193CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4193CPA+, 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 MAX4193CPA+ part is unused and in its original packaging.
Return procedure for MAX4193CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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