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Analog Devices Inc./Maxim Integrated MAX761ESA+
- Part No.:
- MAX761ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX761ESA+.pdf
- Description:
- IC REG BOOST ADJ/5V 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,187
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Product details
Overview
MAX761ESA+ from Maxim Integrated is a high-efficiency, current-limited pulse-frequency-modulated (PFM) step-up DC-DC converter with internal 1A N-channel power MOSFET, 12V fixed output (or adjustable via external resistors), 2V–16.5V input range, and 110µA max supply current. It delivers up to 150mA at 12V from a 5V input and is optimized for flash memory programming in battery-powered systems.
For engineers reviewing the MAX761ESA+ datasheet, MAX761ESA+ pinout, MAX761ESA+ application, or MAX761ESA+ equivalent, key selection considerations include its ultra-low quiescent current, integrated low-battery comparator (LBI/LBO), bootstrapped vs. non-bootstrapped operation modes, and SO-8 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The MAX761ESA+ employs a proprietary current-limited PFM control scheme that combines sub-110µA light-load supply current with 86% peak efficiency across load currents from 0mA to 150mA. Its architecture integrates a 1.5V reference, undervoltage lockout, and dual-mode (bootstrapped/non-bootstrapped) operation to optimize efficiency versus input voltage.
It features an internal 1A N-channel power FET with 1Ω typical on-resistance, programmable output via FB pin, and a dedicated low-battery detector with 1.5V threshold, 20mV hysteresis, and open-drain LBO output. Switching frequency reaches up to 300kHz, enabling use of compact 18µH surface-mount inductors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12V fixed (internal resistor network) or adjustable from 5V to 16.5V via FB pin - enables direct flash programming supply or custom rail generation. |
| Input Voltage Range | 2V to 16.5V - supports single-cell Li-ion, multi-cell alkaline/NiMH, and wide-input industrial supplies without pre-regulation. |
| Max Output Current | 150mA at 12V with 5V input - sufficient for parallel programming of NOR/NAND flash devices requiring stable 12V VPP. |
| Supply Current | 110µA max (typ. 300µA at 5V) - minimizes standby drain in battery-backed systems like PCMCIA cards. |
| Shutdown Current | 5µA max - ensures negligible battery leakage when disabled via SHDN pin. |
| Switching Frequency | Up to 300kHz - allows use of small 18µH SMT inductors and reduces EMI compared to lower-frequency boosters. |
| Reference Voltage | 1.50V ±30mV - precision feedback reference enabling accurate output regulation and low-battery detection. |
| LX Peak Current Limit | 1.0A - defines maximum inductor energy transfer per cycle and supports continuous conduction mode (CCM) under heavy loads. |
Pinout & Package
MAX761ESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with exposed pad not electrically connected. Pin spacing is 1.27mm, body width 3.9mm, and operating junction temperature rated to +150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LBI) | Low-battery comparator input | Accepts divided input voltage; triggers LBO when below 1.5V - enables system-level battery monitoring without external comparators. |
| 2 (SHDN) | Active-high shutdown control | TTL/CMOS-compatible enable input; pulls internal bias off when high, reducing ICC to ≤5µA and disconnecting REF/LBO. |
| 3 (V+) | Main power input / output sense node | Supplies IC bias; in bootstrapped mode, also serves as output voltage feedback point - simplifies layout for fixed-output configurations. |
| 4 (FB) | Feedback input | Connects to resistor divider for adjustable output; tied to GND for 12V fixed mode - determines regulation setpoint with 1.5V reference. |
| 5 (REF) | 1.5V precision reference output | Sources up to 100µA; requires 0.1µF bypass - provides stable reference for external circuitry or LBI divider network. |
| 6 (GND) | Analog/digital ground | Common return for all internal circuits; must be star-connected to minimize noise coupling into FB/REF paths. |
| 7 (LX) | Power switch drain terminal | Drives external inductor; features 1Ω typical on-resistance and 1.5A absolute max peak current - defines power stage capability and thermal limits. |
| 8 (LBO) | Open-drain low-battery output | Sinks current when LBI < 1.5V; requires external pull-up to VOUT or V+ - provides system reset or warning signal with built-in hysteresis. |
Key Features
| Feature | Design Value |
|---|---|
| Current-limited PFM control | Enables 86% efficiency from 1mA to 150mA load while maintaining ≤110µA quiescent current - eliminates need for separate light/heavy-load control schemes. |
| Integrated 1A N-channel power FET | Eliminates external switch and gate driver; reduces BOM count and PCB area - supports full 150mA output with only inductor, diode, and two capacitors. |
| Bootstrapped operation mode | Allows V+ to be powered from VOUT, increasing gate drive and efficiency at low VIN (<4V) - critical for single-cell battery applications. |
| Dual-mode low-battery detection | 1.5V reference with 20mV hysteresis and open-drain LBO output - provides reliable battery monitoring without external components or calibration. |
| Industrial temperature grade | –40°C to +85°C operating range (ESA grade) - qualified for automotive infotainment, industrial handhelds, and extended-life portable equipment. |
| 300kHz switching frequency | Permits use of 18µH SMT inductors and low-ESR 33µF OS-CON output capacitors - achieves compact footprint and low output ripple (<100mV). |
Applications
| Flash Memory Programming | PCMCIA Card Power |
|---|---|
Use Scenario: Parallel programming of 3.3V/5V NOR flash requiring 12V VPP supply during write/erase cycles. IC Role / Device Role / Timing Role: Primary high-voltage DC-DC converter generating regulated 12V from 3.3V or 5V host bus. Use Value: Delivers 150mA at 12V with <110µA quiescent current during standby - extends battery life between programming sessions. |
Use Scenario: Powering Type II PCMCIA cards with legacy 12V logic or analog subsystems from 3.3V or 5V host slots. IC Role / Device Role / Timing Role: Standalone boost regulator providing isolated 12V rail with fast transient response to card insertion/removal events. Use Value: Bootstrapped mode ensures stable 12V output even as host voltage sags to 3.6V - prevents card reset during hot-swap. |
| Battery-Powered Instrumentation | High-Efficiency Portable DC-DC |
Use Scenario: Portable multimeter or data logger using alkaline batteries where 12V is needed for op-amp rails or LCD bias. IC Role / Device Role / Timing Role: Primary power conversion stage converting 2×AA (2.4V–3.2V) to regulated 12V with minimal self-discharge. Use Value: 2V minimum start-up voltage and 5µA shutdown current enable >1-year shelf life with fresh batteries. |
Use Scenario: Space-constrained IoT sensor node requiring efficient 12V rail from Li-ion (3.0V–4.2V) for RF front-end or ADC reference. IC Role / Device Role / Timing Role: Compact, low-component-count boost converter supporting dynamic load steps from µA sleep to 100mA transmit bursts. Use Value: CCM/DCM auto-transition and 300kHz switching minimize output ripple and EMI - simplifies EMC filtering in dense layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX770ESA+ | Drives external MOSFET; no internal switch; supports higher output voltages (>16.5V) and currents (>200mA). | Used when >150mA or >12V output required; needs external FET, gate driver, and higher component count. | Select MAX770ESA+ only if MAX761ESA+ output current or voltage headroom is insufficient - adds complexity but scales performance. |
| TPS61040DRVR | 3.6V max input; 28V max output; 28µA IQ; no integrated LBI/LBO; 500kHz switching. | Optimized for low-input, high-output ratio (e.g., 3.3V→15V); lacks battery monitoring features and industrial temp grade. | Choose TPS61040DRVR for cost-sensitive, narrow-input applications without battery sensing - not suitable for –40°C operation or LBI-based system management. |
Compared with MAX770ESA+ and TPS61040DRVR, the MAX761ESA+ uniquely balances ultra-low IQ, integrated power switch, industrial temperature rating, and embedded low-battery detection - making it optimal for flash programming and PCMCIA where simplicity, reliability, and battery longevity are prioritized over raw output scalability.
Availability
MAX761ESA+ is available at Aetrix Electronics and suitable for flash memory programming, PCMCIA card power, and battery-powered instrumentation requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX761ESA+ 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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.
The MAX761ESA+ belongs to Maxim's high-efficiency, low-IQ DC-DC converter product line, engineered specifically for battery-critical applications such as flash programming and portable peripheral power where minimal quiescent current and integrated functionality reduce system-level complexity.
FAQ
What is the minimum input voltage required for MAX761ESA+ to start up?
The MAX761ESA+ guarantees start-up at 2.0V when using internal feedback resistors in bootstrapped mode. With external resistors, undervoltage lockout raises the minimum start-up voltage to approximately 2.7V. This behavior is confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure MAX761-07), where no-load start-up voltage remains ≤2.0V across –40°C to +85°C for internal-resistor configurations.
Does MAX761ESA+ support adjustable output voltage, and how is it configured?
Yes, MAX761ESA+ supports adjustable output from 5V to 16.5V using external resistors R1 and R2 connected to the FB pin. The formula is R2 = R1 × (VOUT − 1.5V)/1.5V, with R1 selected between 10kΩ and 250kΩ. For fixed 12V operation, FB is tied to GND - a configuration explicitly validated in Figure 2 and the Pin Description section.
How does the low-battery detection function work on MAX761ESA+?
The MAX761ESA+ includes an internal comparator comparing LBI voltage to the 1.5V reference. When LBI falls below 1.5V, LBO (open-drain) pulls low. Hysteresis of 20mV prevents chatter, and LBO is high-impedance during shutdown. The trip point is set by a resistor divider from V+ to GND through LBI, with R3 ≤500kΩ recommended for accuracy - details are in the Applications Information section.
What is the difference between bootstrapped and non-bootstrapped operation for MAX761ESA+?
In bootstrapped mode, V+ is connected to VOUT, enabling higher gate drive and better efficiency at low input voltages (<4V); fixed 12V output is supported. In non-bootstrapped mode, V+ connects directly to VIN, minimizing supply current but requiring external resistors for output setting and sacrificing fixed-output capability - both modes are fully documented in Figures 2 and 3 and the Detailed Description section.
Is MAX761ESA+ pin-compatible with other variants in the MAX761/MAX762 family?
Yes, MAX761ESA+ shares identical pinout and footprint with MAX761CPA, MAX761CSA, MAX761EPA, and MAX762 variants - all use the same 8-pin DIP or SO package. The ESA grade differs only in temperature rating (–40°C to +85°C) and screening; electrical specifications and pin functions are fully aligned per the Ordering Information table and Pin Configuration diagram.
MAX761ESA+ 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:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 5V (12V)
- Voltage - Output (Max):
- 16.5V
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX761ESA+ FAQ
1.How can I place an order for MAX761ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX761ESA+ 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 MAX761ESA+ reliable?
The price and inventory of MAX761ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX761ESA+ is usually 5 days.
3.What payment methods are accepted for MAX761ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX761ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX761ESA+?
MAX761ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX761ESA+ 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 MAX761ESA+?
For technical support, including MAX761ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX761ESA+ requirements.
6.How does Aetrix verify that MAX761ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX761ESA+ 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 MAX761ESA+ meets industry standards.
7.What is the process for return or replacement of MAX761ESA+?
All MAX761ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX761ESA+, 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 MAX761ESA+ part is unused and in its original packaging.
Return procedure for MAX761ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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