My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4193ESA+
- Part No.:
- MAX4193ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4193ESA+.pdf
- Description:
- IC REG BOOST ADJ 525MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,428
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4193ESA+ 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 525mA peak-rated N-channel MOSFET output driver in an 8-pin SO package. Key confirmed parameters include 2.0V–16.5V input range, 70µA typical operating current, 1µA max shutdown current, ±1.5% output voltage accuracy (per MAX630 spec, applicable to MAX4193 family), and 85% typical efficiency - enabling use in +3V-to-+5V and +5V-to-+15V boost converters.
For engineers reviewing the MAX4193ESA+ datasheet, MAX4193ESA+ pinout, MAX4193ESA+ application, or MAX4193ESA+ 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 MAX4193ESA+ implements pulse-frequency modulation (PFM) with a constant-frequency oscillator (0.1–75kHz, set by external CX capacitor) and comparator-based feedback control - not PWM - eliminating need for external op-amps and reducing quiescent current. Its internal 1.31V reference sets output via resistive divider at VFB (pin 7), while LBR (pin 1) and LBD (pin 8) form a dedicated low-battery detection path with 1.31V threshold and 600µA sink capability.
It features bootstrappable operation: +VS (pin 5) may be connected to boosted output to lower LX on-resistance (~4Ω at +16V), improving efficiency at higher loads. Shutdown is logic-level active-low at IC (pin 6), drawing ≤1µA (typ 10nA) when floating or <0.2V - critical for ultra-low-power sleep modes in portable instrumentation and sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.0V to 16.5V - supports single-cell Li-ion (2.7–4.2V), 3V coin cells, 5V rails, and 9V batteries without external regulators. |
| Output Driver Peak Current | 525mA - enables ≥21mA @ +15V output from +5V input using standard 470µH inductor (Figure 1), sufficient for analog front-ends and small microcontrollers. |
| Operating Current | 70µA typical - ensures >80% efficiency even at 100µW load, extending battery life in always-on monitoring devices. |
| Shutdown Current | ≤1µA maximum - allows multi-year operation on CR2032 when paired with periodic wake-up circuitry. |
| Reference Voltage Accuracy | ±1.5% (MAX630-specified, confirmed for MAX4193 family) - enables untrimmed ±3.5% output accuracy with 1% feedback resistors, avoiding costly trimming in cost-sensitive designs. |
| Oscillator Frequency Range | 0.1kHz to 75kHz - adjustable via CX capacitor (e.g., 47pF = 40kHz); lower frequencies increase peak inductor current for better low-VIN power delivery. |
| Low-Battery Detection Threshold | 1.31V (typ) at LBR pin - provides precise, temperature-stable warning before system brownout, usable for NiCd/NiMH or Li-ion end-of-discharge signaling. |
Pinout & Package
MAX4193ESA+ is housed in an 8-pin SO (Small Outline) package, -40°C to +85°C operating temperature range, JEDEC MS-012AC compliant. Pin functions are electrically validated per Maxim's datasheet Figure 1 and Pin Description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery comparator input | Accepts voltage to compare against 1.31V internal reference; sinking LBD output signals battery depletion - used for power-fail detection or system shutdown sequencing. |
| 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 stable operation. |
| 3 LX | N-channel MOSFET drain output | Drives external inductor; 4Ω on-resistance (at +16V) and 525mA peak rating define maximum deliverable power and thermal limits. |
| 4 GND | Analog and power ground reference | Must be low-impedance star point; high di/dt return paths require separate ground trace routing to avoid noise coupling into VFB/LBR. |
| 5 +VS | Main supply input | Accepts 2.0–16.5V; bootstrapping to boosted output lowers LX RON, but increases supply current - trade-off requires layout optimization. |
| 6 IC | Logic-level shutdown control | Driving <0.2V or leaving floating disables oscillator, LX, LBD, and bias circuits - essential for zero-power standby in IoT edge nodes. |
| 7 VFB | Feedback voltage input | Compares divided output voltage to 1.31V reference; 10nA max bias current allows high-value resistor dividers (>1MΩ) to minimize quiescent loss. |
| 8 LBD | Open-drain low-battery detector output | Sinks up to 600µA (typ); requires external pullup to enable interrupt generation or LED indication without additional transistors. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS micropower architecture | 70µA operating current enables >10-year battery life in 10µA average-load applications like remote sensors. |
| Integrated 525mA N-channel MOSFET | Eliminates external switch and gate driver, reducing BOM count and PCB area - critical for space-constrained wearables. |
| Dedicated low-battery detector | Independent 1.31V threshold and open-drain LBD output allow direct MCU GPIO interfacing for graceful shutdown without software polling. |
| Pin compatibility with RC4191/2/3 | Enables drop-in upgrade from legacy Raytheon bipolar regulators, delivering 2× efficiency improvement and extended low-VIN operation. |
| Bootstrappable +VS supply | Connecting +VS to boosted output reduces LX RON from ~6Ω to ~4Ω, increasing available output power by ~30% at full load. |
Applications
| Portable Medical Sensors | +3V-to-+5V Logic Supply |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio requiring regulated +5V from a 3.0V lithium coin cell. IC Role / Device Role / Timing Role: Step-up regulator providing stable +5V rail for RF transceiver and ADC during brief 100ms transmission bursts. Use Value: 85% efficiency at 40mA and 70µA quiescent current extend CR2032 life to >12 months between replacements. |
Use Scenario: Industrial handheld scanner using 3.6V Li-ion battery to power 5V logic and motor drivers. IC Role / Device Role / Timing Role: Primary DC-DC converter generating clean +5V bus from variable battery voltage (4.2V down to 3.0V). Use Value: 2.0V minimum start-up and programmable oscillator allow sustained 5V output even at end-of-discharge, preventing premature shutdown. |
| Uninterruptible +5V Power | 9V Battery Life Extension |
Use Scenario: Smart meter with AC mains + backup NiCd battery, requiring glitch-free +5V during line outage. IC Role / Device Role / Timing Role: Seamless switchover regulator that maintains +5V output regardless of input source - no supervision required. Use Value: LBD output monitors mains voltage and triggers system hibernation before battery depletion, preserving 24h backup runtime. |
Use Scenario: Legacy industrial controller powered by 9V alkaline battery, suffering from rapid voltage sag under load. IC Role / Device Role / Timing Role: Boost converter maintaining constant +9V output as battery decays from 9.0V to 5.5V. Use Value: 1.31V low-battery threshold and oscillator frequency scaling extend usable battery capacity by 40% versus direct connection. |
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+ | Identical pinout, package, and core architecture; differs only in ±1.5% reference accuracy (vs. MAX4193's ±2.5% per datasheet footnote) and tighter line/load regulation specs. | Preferred where untrimmed output accuracy <±4% is mandatory and cost premium is acceptable. | Select MAX630ESA+ if reference tolerance is critical; MAX4193ESA+ offers same footprint with relaxed spec for cost-sensitive volume production. |
| TPS61040DRVR | Higher 28V input rating, 0.7µA shutdown current, but requires external MOSFET and lacks integrated LBD comparator. | Suitable for wider VIN ranges (e.g., 12V automotive) but adds complexity and board area; no native low-battery signaling. | Choose TPS61040DRVR only when >16.5V input or sub-µA shutdown is required; MAX4193ESA+ delivers integrated simplicity for ≤16.5V battery apps. |
Compared with MAX630ESA+, MAX4193ESA+ trades minor reference tolerance for broader commercial temperature qualification and identical functional integration; versus TPS61040DRVR, it sacrifices input voltage headroom to retain monolithic simplicity and built-in battery monitoring - making it optimal for compact, low-maintenance portable electronics.
Availability
MAX4193ESA+ 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 long-lifecycle industrial and consumer programs.
Supply support for MAX4193ESA+ 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX4193ESA+ belongs to Maxim's micropower DC-DC converter product line, engineered specifically for battery-operated systems demanding ultra-low quiescent current, integrated functionality, and minimal external components - targeting portable instrumentation, wearables, and remote sensing.
FAQ
What is the minimum input voltage required for MAX4193ESA+ startup?
The MAX4193ESA+ guarantees startup at 1.9V (min) per Electrical Characteristics table, with full operation from 2.0V to 16.5V. This enables reliable operation from partially discharged 3V lithium batteries or single-cell LiFePO₄ sources. The device maintains regulation down to 2.0V input, making MAX4193ESA+ suitable for applications where battery voltage decay must not disrupt system function.
Does MAX4193ESA+ support adjustable output voltage, and how is it configured?
Yes, MAX4193ESA+ supports fully adjustable output voltage via external resistor divider connected to VFB (pin 7). The internal 1.31V reference sets VOUT = 1.31V × (1 + R1/R2), where R1 connects to output and R2 to ground. With 1% resistors, untrimmed accuracy is ±3.5%. MAX4193ESA+'s 10nA VFB bias current permits high-impedance dividers to minimize quiescent loss without compromising regulation.
How does the low-battery detector in MAX4193ESA+ operate, and what external components are needed?
The MAX4193ESA+ low-battery detector compares voltage at LBR (pin 1) to its 1.31V internal reference. When LBR falls below threshold, open-drain LBD (pin 8) sinks up to 600µA. No external comparator is needed - only a pullup resistor (e.g., 10kΩ to +VS) on LBD to generate logic-level signal. LBR can be driven directly from battery via resistive divider, enabling precise end-of-life detection without additional ICs.
Can MAX4193ESA+ be used in buck or buck-boost configurations, or is it boost-only?
MAX4193ESA+ is optimized for boost topology but supports buck-boost operation in flyback mode using coupled inductors (as shown in Figure 4 of the datasheet). It cannot function as a synchronous buck regulator due to its single N-channel MOSFET output stage and lack of high-side driver. For true buck applications, Maxim recommends the MAX631/MAX632 series - MAX4193ESA+ remains best suited for step-up and isolated flyback-derived topologies.
What is the recommended inductor value for a +3V-to-+5V, 40mA application using MAX4193ESA+?
For +3V-to-+5V at 40mA, Maxim's Figure 5 specifies a 220µH inductor with 47pF CX capacitor (40kHz). This value balances peak current (≤525mA), size, and efficiency - achieving 85% typical. Lower inductance (e.g., 100µH) increases peak current and output power but risks exceeding LX current limit; higher values reduce ripple but constrain maximum load. Dale IHA-104 (500µH, 0.5Ω) or TRW LL-500 (500µH, 0.75Ω) are validated alternatives for MAX4193ESA+.
MAX4193ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX4193ESA+ FAQ
1.How can I place an order for MAX4193ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4193ESA+ 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+ reliable?
The price and inventory of MAX4193ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4193ESA+ is usually 5 days.
3.What payment methods are accepted for MAX4193ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4193ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4193ESA+?
MAX4193ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4193ESA+ 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+?
For technical support, including MAX4193ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4193ESA+ requirements.
6.How does Aetrix verify that MAX4193ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX4193ESA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX4193ESA+?
All MAX4193ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4193ESA+, 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+ part is unused and in its original packaging.
Return procedure for MAX4193ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4193ESA+ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
