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Analog Devices Inc./Maxim Integrated MAX762ESA+
- Part No.:
- MAX762ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX762ESA+.pdf
- Description:
- IC REG BOOST ADJ/5V 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,668
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Product details
Overview
MAX762ESA+ from Maxim Integrated is a high-efficiency, current-limited pulse-frequency-modulated (PFM) step-up DC-DC converter with fixed 15V output, internal 1A N-channel power MOSFET, and 110µA max supply current. It operates from 2V to 16.5V input, delivers up to 150mA, and features integrated low-battery detection (LBI/LBO) and 1.5V reference output. It is designed for flash memory programming in battery-powered PCMCIA cards.
For engineers reviewing the MAX762ESA+ datasheet, MAX762ESA+ pinout, MAX762ESA+ application, or MAX762ESA+ equivalent, key selection considerations include its 15V fixed/adjustable output capability, -40°C to +85°C extended temperature range, 300kHz switching frequency enabling compact magnetics, and shutdown current below 5µA - critical for low-power embedded power management.
Technical Context
The MAX762ESA+ employs a proprietary current-limited PFM control scheme that combines ultra-low quiescent current (≤110µA) with cycle-by-cycle peak-current limiting (1A) and fixed on/off timing (tON ≤ 8µs, tOFF ≥ 1.3µs), enabling high efficiency across light-to-heavy loads without external compensation. Its BiCMOS process integrates a 1Ω LX switch and 1.5V ±15mV reference with 100µA sourcing capability.
It supports dual operating modes: bootstrapped (V+ sensed at output, start-up down to 2.0V, fixed 15V output when FB grounded) and non-bootstrapped (V+ powered directly, requires external resistor divider for adjustable output, no fixed-output option). The LBI/LBO comparator provides 1.5V threshold with 20mV hysteresis and open-drain LBO output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V (±3.6% over temp/voltage/load) or adjustable 5V–16.5V via resistor divider - enables direct flash programming supply or flexible system rail generation. |
| Max Output Current | 150mA at 5V input → 15V output - sufficient for standard flash memory VPP programming voltage with margin. |
| Supply Current | ≤110µA typical (non-shutdown) - minimizes battery drain in always-on or infrequent-use portable systems. |
| Shutdown Current | ≤5µA - preserves battery life during host sleep or standby modes. |
| Switching Frequency | Up to 300kHz - allows use of small 18µH surface-mount inductors (e.g., Sumida CD54-180) and reduces EMI compared to lower-frequency converters. |
| Input Voltage Range | 2.0V to 16.5V - supports single-cell Li-ion (2.7–4.2V), two-cell alkaline (2.0–3.2V), or wide-input industrial rails. |
| Reference Voltage | 1.50V ±15mV (TA = -40°C to +85°C) - stable precision reference for feedback and low-battery comparator, bypassed by 0.1µF ceramic. |
| LX Peak Current Limit | 1.0A (typical), 1.25A (max) - ensures robust short-circuit and overload protection while enabling continuous conduction mode at full load. |
Pinout & Package
MAX762ESA+ is housed in an 8-pin SO (Small Outline) package, 150mil width, with gull-wing leads and RoHS-compliant matte tin finish. Thermal pad not present; power dissipation derated at 5.88mW/°C above +70°C (471mW at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - LBI | Low-battery comparator input | Analog input referenced to internal 1.5V; sets trip point via resistor divider (e.g., R3/R4); must be ≤500kΩ to limit leakage error. |
| 2 - SHDN | Active-high enable control | TTL/CMOS-compatible logic input; drives internal bias off when high, reducing ICC to <5µA and disabling LX switching. |
| 3 - V+ | Main power input / bootstrapped sense node | Supplies IC core; in bootstrapped mode, also serves as output voltage sense point - enables true fixed 15V regulation without external resistors. |
| 4 - FB | Feedback input | Connect to GND for fixed 15V bootstrapped operation; connect resistor divider (VOUT→FB→GND) for adjustable output in non-bootstrapped mode. |
| 5 - REF | Precision 1.5V reference output | Stable 1.5V source capable of sourcing 100µA; requires 0.1µF ceramic bypass capacitor placed adjacent to pin. |
| 6 - GND | Analog and power ground | Single ground reference for all internal circuitry; must be connected to star ground point near input/output capacitors to minimize noise coupling. |
| 7 - LX | Internal N-channel FET drain | Switching node driving external inductor/diode; 1Ω on-resistance, 1.25A peak rating; layout requires short, low-inductance trace to reduce ringing. |
| 8 - LBO | Open-drain low-battery output | Asserts low when LBI < 1.5V; requires external pull-up (e.g., 100kΩ to VOUT); high-impedance during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Current-limited PFM control | Delivers 86% efficiency from 1mA to 150mA load while maintaining ≤110µA quiescent current - eliminates trade-off between light-load IQ and heavy-load efficiency. |
| Integrated 1A N-channel power FET | Eliminates external switch, reducing BOM count and PCB area; 1Ω RDS(on) enables high efficiency without gate-driver complexity. |
| Bootstrapped vs. non-bootstrapped operation | Supports both topologies: bootstrapped enables 2.0V start-up and fixed 15V output; non-bootstrapped minimizes supply current for mid-range inputs (4–6V). |
| On-chip low-battery detector | 1.5V comparator with 20mV hysteresis and open-drain LBO output - provides reliable battery monitoring without external comparators or references. |
| 1.5V precision reference | 1.50V ±15mV over -40°C to +85°C, 100µA sourcing - usable for external ADC reference, sensor biasing, or auxiliary feedback networks. |
| 300kHz switching frequency | Enables use of tiny 18µH SMT inductors (e.g., Sumida RCH855-180M) and low-ESR 33µF OS-CON output capacitors - reduces solution size by >40% vs. 100kHz alternatives. |
Applications
| Flash Memory Programming | PCMCIA Card Power Supply |
|---|---|
Use Scenario: Providing 15V VPP programming voltage to NOR/NAND flash in portable data acquisition modules. IC Role / Device Role / Timing Role: Primary step-up regulator generating stable 15V rail from 3.3V or 5V system bus or single-cell battery. Use Value: Guarantees 150mA at 15V from 5V input with <110µA quiescent draw - extends battery life during firmware updates and enables compact, low-profile card designs. |
Use Scenario: Powering Type II PCMCIA slots requiring 12–15V VCC/VPP from 3.3V host logic rails. IC Role / Device Role / Timing Role: Standalone boost converter with integrated LBO for battery-gauge integration and SHDN for slot power sequencing. Use Value: Eliminates need for discrete FET, controller, and reference; supports hot-swap compliance via fast start-up (<1ms) and controlled enable timing. |
| Battery-Powered Medical Sensors | Industrial Handheld Terminals |
Use Scenario: Generating 15V bias for piezoelectric transducers or MEMS actuators in wearable diagnostic devices. IC Role / Device Role / Timing Role: High-efficiency boost stage preceding analog front-end, synchronized to measurement cycles via SHDN. Use Value: 5µA shutdown current preserves coin-cell battery for >2 years in sleep mode; 2.0V minimum start-up supports depleted battery operation. |
Use Scenario: Supplying 15V to RS-232 transceivers and EEPROM programmers in ruggedized field terminals. IC Role / Device Role / Timing Role: Primary DC-DC converter with extended -40°C to +85°C operation and integrated low-battery warning (LBI/LBO). Use Value: Single-chip solution meets MIL-STD-810 thermal cycling requirements; LBO signal triggers graceful shutdown before brownout. |
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 |
|---|---|---|---|
| MAX771CPA+ | Drives external N-MOSFET; no internal switch; adjustable output only; higher IQ (250µA); wider input (1.8–16.5V) | Suitable for >500mA outputs or higher-voltage rails (>16.5V); requires external FET, gate driver, and feedback network. | Select MAX771CPA+ when output current exceeds 150mA or when design requires programmable overvoltage protection beyond internal 1A limit. |
| TPS61040DRVR | Fixed 28V output or adjustable (1.8–28V); 2.5V min input; 28µA IQ; 1.2MHz switching; no LBI/LBO or REF | Optimized for ultra-low-IQ portable apps (e.g., IoT sensors); lacks integrated battery monitor and precision reference. | Choose TPS61040DRVR for space-constrained, ultra-low-power applications where 15V fixed output and battery monitoring are unnecessary. |
Compared with MAX762ESA+, MAX771CPA+ offers higher drive capability but adds component count and complexity, while TPS61040DRVR achieves lower quiescent current at the expense of missing integrated monitoring and reference functions - making MAX762ESA+ optimal for compact, self-contained 15V flash-programming supplies.
Availability
MAX762ESA+ is available at Aetrix Electronics and suitable for flash memory programming, PCMCIA card power, and battery-powered medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX762ESA+ 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, communications, and computing markets.
The MAX761/MAX762 family was engineered specifically for low-power, high-efficiency boost conversion in portable memory systems - emphasizing minimal external components, ultra-low IQ, and integrated battery monitoring for flash programming and PCMCIA applications.
FAQ
What is the guaranteed output current capability of the MAX762ESA+ at 5V input?
The MAX762ESA+ guarantees 150mA output current when stepping up from a 5V input to 15V, as confirmed in the Electrical Characteristics table under "Output Voltage" conditions (V+ = 5V, ILOAD = 150mA). This specification holds across the full -40°C to +85°C operating temperature range and accounts for line/load regulation, ensuring reliable flash memory VPP programming in real-world conditions. The MAX762ESA+ maintains this performance using its internal 1A switch and current-limited PFM control.
Can the MAX762ESA+ operate with a 2.0V input supply?
Yes, the MAX762ESA+ supports a minimum start-up voltage of 2.0V in bootstrapped mode (with FB grounded), as explicitly stated in the Absolute Maximum Ratings and Typical Operating Characteristics. This capability is enabled by dedicated start-up circuitry that fixes duty cycle at 50% until V+ reaches 2.5V. Once started, operation continues down to ~1.7V under light loads. The MAX762ESA+ datasheet confirms this behavior in Figure MAX761-07 (No-Load Start-Up Voltage vs. Temperature) and the General Description section.
Does the MAX762ESA+ require external components to generate its fixed 15V output?
No, the MAX762ESA+ delivers fixed 15V output without external resistors when configured in bootstrapped mode with FB pin connected to GND. This configuration uses internal feedback resistors and leverages the V+ pin as the output voltage sense node. The datasheet's Pin Description and Typical Operating Circuit (Figure 2) confirm that grounding FB enables fixed 15V operation - a key differentiator from adjustable-only boost converters. External resistors are required only for non-bootstrapped operation or adjustable output voltages.
How does the low-battery detector (LBI/LBO) function in the MAX762ESA+?
The MAX762ESA+ integrates a precision low-battery comparator comparing LBI voltage to its internal 1.5V reference. When LBI falls below 1.5V, LBO (open-drain) pulls low; hysteresis of 20mV prevents chatter. LBO is high-impedance during shutdown. To set trip voltage, use resistor divider R3/R4 per VTRIP = 1.5V × (1 + R4/R3). The MAX762ESA+ datasheet specifies LBI leakage <60nA and mandates R3 ≤500kΩ to ensure accuracy - verified in the Electrical Characteristics table (LBI Threshold Voltage, LBI Leakage Current).
What is the maximum allowable junction temperature for the MAX762ESA+?
The MAX762ESA+ has a maximum junction temperature of +150°C, as specified in the Absolute Maximum Ratings table under "Junction Temperatures" for MAX76_E_A grade devices. This rating applies across its full -40°C to +85°C ambient operating range. Derating begins at +70°C with 5.88mW/°C reduction in SO package power dissipation. Thermal design must ensure θJA and power loss (calculated from efficiency curves in Figures MAX761-01/02) keep TJ ≤150°C - confirmed in the datasheet's Thermal Characteristics section and Absolute Maximum Ratings.
MAX762ESA+ 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 (15V)
- 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
MAX762ESA+ FAQ
1.How can I place an order for MAX762ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX762ESA+ 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 MAX762ESA+ reliable?
The price and inventory of MAX762ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX762ESA+ is usually 5 days.
3.What payment methods are accepted for MAX762ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX762ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX762ESA+?
MAX762ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX762ESA+ 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 MAX762ESA+?
For technical support, including MAX762ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX762ESA+ requirements.
6.How does Aetrix verify that MAX762ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX762ESA+ 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 MAX762ESA+ meets industry standards.
7.What is the process for return or replacement of MAX762ESA+?
All MAX762ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX762ESA+, 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 MAX762ESA+ part is unused and in its original packaging.
Return procedure for MAX762ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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