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Analog Devices Inc./Maxim Integrated MAX4193ESA+T
- Part No.:
- MAX4193ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4193ESA+T.pdf
- Description:
- IC REG BOOST ADJ 525MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,294
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Product details
Overview
MAX4193ESA+T from Maxim Integrated is a CMOS micropower step-up switching regulator IC integrating a 1.31V bandgap reference, oscillator, voltage comparator, and 375mA N-channel output MOSFET in an 8-pin SO package. It operates from 2.0V to 16.5V input, delivers up to 5W output, achieves 85% typical efficiency, and features logic-level shutdown (≤1µA quiescent current) and low-battery detection. It is used in +3V-to-+5V and +5V-to-+15V DC-DC converters for portable instrumentation and battery life extension.
For engineers reviewing the MAX4193ESA+T datasheet, MAX4193ESA+T pinout, MAX4193ESA+T application, or MAX4193ESA+T equivalent, key selection criteria include its 70µA typical operating current, ±1.5% internal reference accuracy, 4Ω LX on-resistance, 40kHz typical oscillator frequency (set by CX capacitor), and compatibility with RC4191/2/3 bipolar regulators in footprint-constrained designs.
Technical Context
The MAX4193ESA+T implements pulse-frequency modulation (PFM) with a constant-frequency oscillator and comparator-based feedback-no external op-amp required. Its control loop compares VFB against a 1.31V internal reference to gate LX pulses, enabling high efficiency at light loads via pulse-skipping duty-cycle control.
It integrates a 525mA peak-current N-channel MOSFET driver (LX), open-drain low-battery detector (LBD) with 600µA sink capability, and shutdown input (IC) that disables all analog circuitry below 0.2V. The LBR input monitors external voltage thresholds, while CX sets oscillator frequency independently of load or supply variation.
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 industrial 5–12V rails without external LDO pre-regulation. |
| Internal Reference Voltage | 1.31V ±0.06V - enables precise output voltage setting (e.g., +5V = 1.31V × (1 + R1/R2)) with ≤±3.5% untrimmed system accuracy using 1% resistors. |
| LX Output Driver | 4Ω on-resistance, 525mA peak current - directly drives standard 470µH inductors; reduces need for external gate drivers or discrete MOSFETs. |
| Operating Current | 70µA typical - ensures >80% efficiency even at 1mA output load, critical for multi-year battery operation in IoT sensors. |
| Shutdown Quiescent Current | ≤1µA - allows full system sleep mode with negligible battery drain; enabled by floating or <0.2V IC pin. |
| Oscillator Frequency | 40kHz typical (47pF on CX) - balances switching loss vs. inductor size; adjustable from 0.1kHz to 75kHz via external ceramic capacitor. |
| Low-Battery Detection | 1.31V threshold on LBR, 600µA sink on LBD - provides fail-safe power-fail warning or automatic frequency scaling to sustain output as input decays. |
Pinout & Package
MAX4193ESA+T is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm, 1.75mm height, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery comparator input | Monitors external voltage divider; asserts LBD when voltage falls below 1.31V - used for battery voltage monitoring or power-fail detection. |
| 2 CX | Oscillator timing capacitor node | Connects to ground via 47pF ceramic capacitor to set 40kHz switching frequency; tolerance directly impacts regulation stability and ripple. |
| 3 LX | Switching node driver output | Drives external inductor with integrated 4Ω N-MOSFET; peak current limited to 525mA - defines maximum deliverable power and inductor sizing. |
| 4 GND | Analog and power ground | Common return for reference, comparator, oscillator, and LX driver; requires low-impedance PCB plane to minimize noise coupling into feedback path. |
| 5 +VS | Main supply input | Accepts 2.0–16.5V; powers internal circuitry and provides gate drive for LX MOSFET - bootstrapping to boosted output improves efficiency above 3V input. |
| 6 IC | Logic-level shutdown control | Drives device into <1µA shutdown when ≤0.2V or floating; pull-up to +VS enables normal operation - enables microcontroller-controlled power gating. |
| 7 VFB | Feedback voltage input | Compares against 1.31V reference; regulates output by pulsing LX until VFB ≥ 1.31V - sets output voltage via resistor divider from output to GND. |
| 8 LBD | Open-drain low-battery output | Sinks up to 600µA when LBR < 1.31V; requires external pull-up to generate active-low warning signal or trigger MCU interrupt. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N-channel MOSFET driver | Eliminates need for external switch and gate driver; 4Ω RON and 525mA peak rating support compact 5W boost designs with minimal BOM. |
| Comparator-based PFM control | Removes requirement for external op-amp or error amplifier; reduces component count, layout area, and quiescent current versus PWM alternatives. |
| Logic-level shutdown input | Enables system-level power sequencing with standard CMOS outputs; <1µA shutdown current extends shelf life and enables deep-sleep modes. |
| On-chip 1.31V bandgap reference | Provides stable, temperature-compensated feedback reference; ±1.5% accuracy over temperature enables robust output regulation without trimming. |
| Pin compatibility with RC4191/2/3 | Allows drop-in replacement of legacy Raytheon bipolar regulators in existing PDIP/SO footprints, delivering higher efficiency and lower-voltage operation. |
Applications
| Portable Medical Sensors | +3V to +5V Logic Supply |
|---|---|
Use Scenario: Wearable ECG monitor powered by a single 3V coin cell requiring regulated +5V for ADC and Bluetooth radio. IC Role / Device Role / Timing Role: Step-up regulator generating stable +5V from decaying 3.0–2.2V battery; LX pulses at 40kHz to charge inductor, VFB maintains regulation, LBD triggers firmware alert at 2.4V. Use Value: 85% efficiency at 10mA load extends battery life to >2 years; 70µA quiescent current preserves charge during sleep cycles between measurements. | Use Scenario: Handheld barcode scanner using two AA batteries (3V nominal) to power 5V microcontroller, display, and laser diode. IC Role / Device Role / Timing Role: Primary DC-DC converter boosting 3V input to 5V output; IC pin enables MCU-controlled shutdown during idle; CX sets 40kHz switching for optimal inductor size. Use Value: Delivers 40mA continuous output with <50mV ripple; pin compatibility with RC4192 simplifies migration from legacy design without PCB rework. |
| Uninterruptible +5V Bus | 9V Battery Life Extension |
Use Scenario: Industrial data logger with AC adapter and backup NiMH battery, requiring glitch-free +5V during mains failure. IC Role / Device Role / Timing Role: Always-on regulator sourcing +5V from either 5V rail (trickle-charging battery) or 3.6V battery (boosting to +5V); LBD monitors line voltage to initiate switchover. Use Value: Zero-output disruption during transfer; no external diodes or OR-ing controllers needed - simplifies BOM and improves reliability. | Use Scenario: Smoke detector using 9V alkaline battery, where standby current must be <10µA for 10-year life, but alarm mode draws 100mA. IC Role / Device Role / Timing Role: Boost converter supplying 5V to MCU and buzzer only during alarm; IC pin disables regulator during standby; LBD detects end-of-life battery voltage. Use Value: <1µA shutdown current meets 10-year shelf-life target; 525mA LX peak current supports instantaneous 100mA buzzer activation without brownout. |
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 |
|---|---|---|---|
| MAX630ESA+T | Same pinout, identical architecture, but ±1.5% reference accuracy vs. MAX4193's ±2.5% over temp; 375mA rated switch current (vs. 525mA peak). | Optimized for fixed +5V/+12V outputs; less suitable for wide-input-range or high-peak-current designs requiring margin. | Select MAX630ESA+T only if reference accuracy is primary concern and peak load ≤375mA; verify LX thermal derating in SO package. |
| TPS61040DRVR | Higher 28V input rating, 0.5A switch, 500kHz–3MHz adjustable frequency; requires external compensation; no integrated LBD or LBR. | Targets higher-power, smaller-inductor designs; lacks integrated battery monitor - needs external comparator for low-battery signaling. | Choose TPS61040DRVR for >500mA loads or space-constrained layouts needing MHz switching; add discrete LBD circuit if battery monitoring is required. |
Compared with MAX630ESA+T, the MAX4193ESA+T offers higher peak switch current and relaxed reference tolerance, making it more robust for variable-load battery systems; versus TPS61040DRVR, it trades higher-frequency flexibility for integrated monitoring and simpler layout, favoring cost-sensitive, low-to-mid power applications.
Availability
MAX4193ESA+T is available at Aetrix Electronics and suitable for portable medical sensors, uninterruptible +5V power supplies, 9V battery life extension circuits, and industrial data loggers requiring stable component supply across extended temperature ranges.
Supply support for MAX4193ESA+T 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, and communications markets.
The MAX4193ESA+T belongs to Maxim's micropower DC-DC converter product line, designed specifically for ultra-low-quiescent-current, battery-operated step-up applications where long service life and minimal external components are critical.
FAQ
What is the maximum output power achievable with the MAX4193ESA+T?
The MAX4193ESA+T supports up to 5W output power in optimized boost configurations. This assumes proper inductor selection (e.g., 470µH, 525mA saturation current), low-ESR output capacitor (≥470µF), and thermal management within the SO package's 441mW power dissipation limit at +85°C ambient. Real-world output depends on input voltage, switching frequency, and PCB layout.
Can the MAX4193ESA+T operate from a single 1.5V alkaline cell?
No - the MAX4193ESA+T has a minimum operating voltage of 2.0V per its Absolute Maximum Ratings and Electrical Characteristics tables. Startup requires ≥2.2V (typical), and reliable regulation demands ≥2.4V under load. For 1.5V cells, consider pre-boosting or selecting a dedicated ultra-low-voltage regulator such as the MAX1722.
How does the low-battery detector (LBD) function in the MAX4193ESA+T?
The MAX4193ESA+T's LBD is an open-drain N-channel MOSFET output tied to pin 8. It sinks up to 600µA when the voltage at LBR (pin 1) falls below the internal 1.31V reference. An external pull-up resistor (e.g., 10kΩ to +VS) converts this into an active-low warning signal usable by a microcontroller GPIO or interrupt pin.
Is the MAX4193ESA+T pin-compatible with the MAX630ESA+T?
Yes - the MAX4193ESA+T and MAX630ESA+T share identical 8-pin SO packaging, pin assignments, and functional pin definitions. They are fully interchangeable at the board level. However, differences exist in reference accuracy (±2.5% vs. ±1.5%), switch current rating (525mA peak vs. 375mA rated), and temperature performance - verify system margins before substitution.
What external components are mandatory for basic operation of the MAX4193ESA+T?
Four components are mandatory: (1) CX capacitor (e.g., 47pF ceramic) on pin 2 to set oscillator frequency; (2) inductor (e.g., 470µH) between LX (pin 3) and output; (3) catch diode (e.g., 1N4148 or Schottky) from LX to output; and (4) feedback resistor divider (R1/R2) from output to VFB (pin 7) and GND. Optional but recommended: input bypass capacitor and LBD pull-up resistor.
MAX4193ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4193ESA+T FAQ
1.How can I place an order for MAX4193ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4193ESA+T 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 MAX4193ESA+T reliable?
The price and inventory of MAX4193ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4193ESA+T is usually 5 days.
3.What payment methods are accepted for MAX4193ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4193ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4193ESA+T?
MAX4193ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4193ESA+T 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 MAX4193ESA+T?
For technical support, including MAX4193ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4193ESA+T requirements.
6.How does Aetrix verify that MAX4193ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4193ESA+T 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 MAX4193ESA+T meets industry standards.
7.What is the process for return or replacement of MAX4193ESA+T?
All MAX4193ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4193ESA+T, 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 MAX4193ESA+T part is unused and in its original packaging.
Return procedure for MAX4193ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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