My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX750AESA+
- Part No.:
- MAX750AESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX750AESA+.pdf
- Description:
- IC REG BUCK ADJ 450MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,051
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX750AESA+ from Maxim Integrated is an adjustable-output, CMOS step-down DC-DC switching regulator in an 8-pin SO package, operating from 4V to 11V input and delivering up to 450mA output current with 85–92% efficiency, 1.7mA quiescent supply current, and ±4.5% output voltage accuracy over line/load/temperature - used in portable instrumentation and computer peripherals requiring compact, efficient local regulation.
For engineers reviewing the MAX750AESA+ datasheet, MAX750AESA+ pinout, MAX750AESA+ application, or MAX750AESA+ equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and electrical specifications across -40°C to +85°C, and real-world design constraints for buck converter implementation including soft-start timing, shutdown leakage (6µA), and current-mode PWM control architecture.
Technical Context
The MAX750AESA+ implements a fixed-frequency (160kHz) current-mode PWM control architecture with inner-cycle current sensing and outer-voltage loop error amplification, enabling precise output regulation and fast transient response. It integrates a P-channel power MOSFET switch, 1.22V bandgap reference, and undervoltage lockout (UVLO) with 3.75V turn-on and 3.50V turn-off thresholds.
Soft-start is programmable via external capacitor on SS pin, limiting inrush current and providing short-circuit protection; cycle-by-cycle current limiting triggers at ~1.5A peak inductor current. The device operates in continuous or discontinuous conduction mode depending on input/output voltage, load, and selected inductor (33µH or 100µH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.0V to 11.0V - defines minimum battery voltage support and maximum unregulated rail compatibility for portable systems. |
| Output Current | Up to 450mA - sustained load capability at 5V output with V+ = 9V, limited by thermal dissipation in SO package (471mW @ +70°C). |
| Switching Frequency | 160kHz - enables use of small external magnetics (33µH/100µH) and predictable EMI filtering without subharmonic ripple. |
| Reference Voltage | 1.22V ±3% - sets output adjustability range (1.25V to V+) via external resistor divider; tolerance directly impacts output accuracy. |
| Quiescent Supply Current | 1.7mA typical - determines no-load power loss in always-on subsystems; drops to 6µA in shutdown mode. |
| Shutdown Threshold | 0.25V (VIH), 1.0V (VIL) - defines logic-level compatibility with microcontroller GPIOs for controlled power sequencing. |
| UVLO Threshold | 3.75V (rising), 3.50V (falling) - prevents erratic operation during brown-out conditions and ensures clean startup. |
Pinout & Package
MAX750AESA+ uses an 8-pin SO (Small Outline) package per JEDEC MS-012, 3.9mm × 4.9mm body, 1.27mm pitch, with exposed pad not electrically connected. Pin 5 (I.C.) is internal connection - no external tie. Pin 8 (N.C.) is not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN | Active-low shutdown control | Pulling low disables regulator, drops output to 0V, and reduces supply current to 6µA; tie to V+ for normal operation. |
| 2 REF | 1.22V reference output | Supplies ≤100µA for external biasing; bypass with ≤0.047µF capacitor to GND for stability. |
| 3 SS | Soft-start timing and current limit clamp | Capacitor to GND sets startup ramp time and limits peak output current; 510kΩ resistor to SHDN enables current boost. |
| 4 CC | Feedback compensation node | Connects to voltage divider output; 330pF capacitor between CC and output provides loop stability and transient performance. |
| 5 I.C. | Internal connection | No external connection permitted - floating or tied to any potential may cause malfunction. |
| 6 GND | Power and signal ground reference | Must be low-impedance star point; connects to LX source path and all bypass capacitors. |
| 7 LX | Switch node | Drain of internal P-channel MOSFET; connects to inductor and catch diode anode; handles high dv/dt and peak currents up to 2A. |
| 8 V+ | Input supply voltage | Bypass with 1µF ceramic + bulk electrolytic capacitor; absolute max rating is +12V, -0.3V. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | 1.25V to V+ via external resistor divider - supports custom rail generation without multiple fixed-output variants. |
| Current-Mode PWM Control | 160kHz fixed frequency with cycle-by-cycle current limiting - eliminates need for slope compensation and improves load transient response. |
| Integrated Protection | Undervoltage lockout (3.75V/3.50V), soft-start, and overcurrent limiting (~1.5A) - ensures robust startup and fault recovery without external circuitry. |
| Low Quiescent Current | 1.7mA operating / 6µA shutdown - extends battery life in portable equipment with intermittent active periods. |
| Pre-Selected Inductor Support | Validated with 33µH (wide-temp) or 100µH (commercial) - eliminates inductor design effort and guarantees performance across temperature range. |
Applications
| Portable Instrumentation | Computer Peripherals |
|---|---|
Use Scenario: Battery-powered handheld multimeters and data loggers requiring stable 3.3V or 5V rails from varying Li-ion or alkaline sources. IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated battery voltage to precision analog/digital supply. Use Value: Delivers 450mA at >85% efficiency with minimal thermal rise in SO package, enabling compact enclosure designs without forced cooling. |
Use Scenario: USB-powered external storage enclosures and docking stations needing clean 5V/3.3V for bridge ICs and flash memory controllers. IC Role / Device Role / Timing Role: Local DC-DC converter isolating sensitive logic supplies from noisy USB bus transients. Use Value: 160kHz switching avoids interference with USB 2.0 signaling; ±4.5% output accuracy ensures reliable interface timing margins. |
| Cellular Radios | Portable Communications Equipment |
Use Scenario: Half-duplex PMR radios using single-cell Li-ion (3.0–4.2V) with boost+buck architecture where MAX750AESA+ supplies RF front-end bias. IC Role / Device Role / Timing Role: Secondary buck regulator generating low-noise 2.8V for PA driver stages and LNA bias networks. Use Value: Absence of subharmonic ripple simplifies output filtering; shutdown mode (<6µA) preserves battery during standby intervals. |
Use Scenario: Ruggedized field terminals and two-way radio accessories operating across -40°C to +85°C ambient with wide-input industrial batteries. IC Role / Device Role / Timing Role: Main system regulator powering MCU, display, and serial interface from 6–11V nominal battery packs. Use Value: Guaranteed operation at -40°C enables deployment in outdoor infrastructure; UVLO prevents reset glitches during cold cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678-5.0/NOPB | Fixed 5V output, 5A capability, 260kHz switching, requires external MOSFET - higher current but less flexible. | Best for high-current fixed-rail systems; lacks adjustable output and integrated FET - needs more board area and design validation. | Select when 5V-only output and >1A load justify added complexity and cost; not suitable for variable-output or space-constrained designs. |
| TPS5430DDAR | 3A output, 500kHz switching, adjustable output, external compensation - higher efficiency at light loads but tighter layout sensitivity. | Preferred for high-density PCBs needing >1A and better light-load efficiency; requires careful loop compensation tuning. | Choose for next-gen portable devices demanding higher current and lower quiescent current; verify EMI compliance due to higher fSW. |
Compared with LM2678-5.0/NOPB and TPS5430DDAR, the MAX750AESA+ offers integrated FET, proven 33µH/100µH inductor compatibility, and guaranteed -40°C to +85°C operation - making it optimal for cost-sensitive, medium-current portable applications where design simplicity and temperature robustness outweigh raw current headroom.
Availability
MAX750AESA+ is available at Aetrix Electronics and suitable for portable instrumentation, computer peripherals, and cellular radios requiring stable component supply with guaranteed -40°C to +85°C operation and long-term production continuity.
Supply support for MAX750AESA+ 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, communications, and consumer applications.
The MAX750AESA+ belongs to Maxim's legacy high-efficiency DC-DC regulator family designed specifically for portable and battery-operated systems requiring compact, thermally efficient, and easy-to-implement step-down conversion.
FAQ
What is the maximum input voltage rating for the MAX750AESA+?
The MAX750AESA+ has an absolute maximum input voltage rating of +12V at the V+ pin, with recommended operating range from 4.0V to 11.0V. Exceeding 12V risks permanent damage; operation above 11.0V is outside guaranteed specification and may compromise output regulation or thermal performance. Always observe derating curves in the datasheet for extended temperature operation.
Does the MAX750AESA+ require an external MOSFET?
No, the MAX750AESA+ integrates a P-channel power MOSFET switch at the LX pin - no external FET is needed. This simplifies design and reduces bill-of-materials count. The internal switch supports up to 2A peak current and is optimized for use with 33µH or 100µH inductors as specified in Maxim's application notes for the MAX750AESA+.
What output voltage accuracy can be expected from the MAX750AESA+ over temperature?
The MAX750AESA+ guarantees output voltage accuracy of ±4.5% over line, load, and temperature (–40°C to +85°C), plus the tolerance of external feedback resistors. The internal 1.22V reference contributes ±3% variation, and resistor tolerances (e.g., 1% R2/R3) directly add to total error - typical total accuracy is ±5.5% to ±6.5% in production designs using standard 1% resistors.
How does the soft-start function work on the MAX750AESA+?
The MAX750AESA+ implements soft-start via the SS pin: an external capacitor to GND controls ramp time, while a 510kΩ resistor from SS to SHDN enables current boost during startup. Typical values (0.1µF cap + 510kΩ resistor) yield ~6ms soft-start at V+ = 9V, limiting inrush current and preventing output overshoot. The SS pin also serves as overcurrent fault clamp - discharging during faults initiates automatic recovery.
Is the MAX750AESA+ pin-compatible with the MAX758AESA+?
No, the MAX750AESA+ and MAX758AESA+ are not pin-compatible. While both use 8-pin SO packages and share identical pin numbering, the MAX758A supports 4V–16V input and 750mA output, requiring different internal current-sense thresholds and UVLO levels. Their electrical characteristics diverge significantly - substituting one for the other without circuit revalidation risks overcurrent, thermal failure, or regulation loss.
MAX750AESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 11V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 11V
- Current - Output:
- 450mA
- Frequency - Switching:
- 170kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX750AESA+ FAQ
1.How can I place an order for MAX750AESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX750AESA+ 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 MAX750AESA+ reliable?
The price and inventory of MAX750AESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX750AESA+ is usually 5 days.
3.What payment methods are accepted for MAX750AESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX750AESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX750AESA+?
MAX750AESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX750AESA+ 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 MAX750AESA+?
For technical support, including MAX750AESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX750AESA+ requirements.
6.How does Aetrix verify that MAX750AESA+ is sourced from the original manufacturer or authorized distributors?
All MAX750AESA+ 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 MAX750AESA+ meets industry standards.
7.What is the process for return or replacement of MAX750AESA+?
All MAX750AESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX750AESA+, 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 MAX750AESA+ part is unused and in its original packaging.
Return procedure for MAX750AESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX750AESA+ 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…
