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Analog Devices Inc./Maxim Integrated MAX762CPA+
- Part No.:
- MAX762CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX762CPA+.pdf
- Description:
- IC REG BOOST ADJ/5V 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,030
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Product details
Overview
The MAX762CPA+ from Maxim Integrated is a 15V, 150mA step-up DC-DC converter with current-limited pulse-frequency-modulated (PFM) control, internal 1A N-channel power MOSFET, and integrated low-battery comparator. It operates from 2V to 16.5V input, delivers up to 86% efficiency across load range, and draws only 110µA quiescent current-ideal for flash memory programming in battery-powered PCMCIA cards.
For engineers reviewing the MAX762CPA+ datasheet, MAX762CPA+ pinout, MAX762CPA+ application, or MAX762CPA+ equivalent, key selection criteria include its fixed 15V output capability, bootstrapped/non-bootstrapped mode flexibility, LBI/LBO low-battery detection interface, and compatibility with 18µH surface-mount inductors and Schottky rectifiers like 1N5817.
Technical Context
The MAX762CPA+ uses a proprietary BiCMOS PFM control scheme combining ultra-low supply current (<110µA) with high full-load efficiency via peak-current limiting (1A) and programmable on/off timing (6–10µs on, 1.0–1.6µs off). Its internal 1.5V reference (±30mV over temperature) feeds both FB regulation and LBI comparator circuitry.
It supports two distinct operating modes: bootstrapped (V+ tied to VOUT, enabling 2.0V start-up and higher efficiency at low VIN) and non-bootstrapped (V+ tied to VIN, minimizing supply current but requiring external resistors for output setting). The LBO open-drain output provides hysteresis (20mV) for noise-immune low-battery signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V (MAX762), or adjustable 5V–16.5V via external resistor divider |
| Max Output Current | 150mA at 5V input → 15V output; derates with lower VIN or higher VOUT |
| Supply Current | 110µA max (light load); enables >1000-hour battery life in coin-cell applications |
| Shutdown Current | 5µA max; reduces system standby power in portable devices |
| Switching Frequency | Up to 300kHz; allows use of compact 18µH SMT inductors and minimizes EMI filtering needs |
| Input Voltage Range | 2.0V to 16.5V; supports single-cell Li-ion, multi-cell alkaline, and wide industrial rails |
| Reference Voltage | 1.50V ±30mV (−40°C to +85°C); used for FB regulation and LBI threshold comparison |
Pinout & Package
MAX762CPA+ is housed in an 8-pin plastic DIP package (0°C to +70°C operating range), with through-hole mounting and 0.3-inch width. Pin 1 is LBI; pin 8 is LBO. All pins are electrically defined per Maxim's official pin description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LBI (Pin 1) | Low-battery input | Compares external voltage to 1.5V reference; falling-edge trip triggers LBO |
| SHDN (Pin 2) | Active-high shutdown control | TTL/CMOS-compatible; pulls internal bias off when high, reducing ICC to <5µA |
| V+ (Pin 3) | Main power input / output sense | In bootstrapped mode, also serves as output voltage feedback node |
| FB (Pin 4) | Feedback input | Connect to GND for fixed 15V output (bootstrapped); or to resistor divider for adjustable output |
| REF (Pin 5) | 1.5V precision reference output | Sources up to 100µA; requires 0.1µF bypass capacitor for stability |
| GND (Pin 6) | Analog/digital ground | Star-ground connection point for C1, C2, C4, and LX return path |
| LX (Pin 7) | Switch node | Drain of internal 1A N-MOSFET; connects to inductor and catch diode anode |
| LBO (Pin 8) | Open-drain low-battery output | Sinks current when LBI < 1.5V; requires external pull-up to VOUT or V+ |
Key Features
| Feature | Design Value |
|---|---|
| Current-limited PFM control | Enables 86% efficiency from 1mA to 150mA load while maintaining <110µA IQ |
| Integrated 1A N-channel MOSFET | Eliminates external switch; reduces BOM count and PCB area in low/medium-power designs |
| Bootstrapped operation mode | Supports 2.0V minimum start-up and higher efficiency below 4V input vs. non-bootstrapped mode |
| Dual-mode low-battery detector | LBI/LBO pair provides hysteresis-stabilized battery monitoring without external comparators |
| 300kHz switching frequency | Permits use of miniature 18µH SMT inductors and reduces filter capacitor size vs. 100kHz converters |
Applications
| Flash Memory Programming | PCMCIA Card Power |
|---|---|
Use Scenario: Providing regulated 15V programming voltage to NOR/NAND flash in embedded systems during firmware update. IC Role / Device Role / Timing Role: Primary step-up regulator supplying 150mA at 15V with fast transient response to handle burst programming currents. Use Value: Enables direct battery-powered flash programming without external boost stages or charge pumps. | Use Scenario: Powering Type II PCMCIA card slots requiring 15V auxiliary supply from 3.3V or 5V host rails. IC Role / Device Role / Timing Role: Compact, high-efficiency DC-DC converter delivering stable 15V output with minimal thermal rise in tight card-edge space. Use Value: Reduces reliance on bulky external DC-DC modules while meeting PCMCIA power specification margins. |
| Battery-Powered Instrumentation | High-Efficiency Portable DC-DC |
Use Scenario: Supplying 15V bias to analog front-end op-amps or ADC drivers in handheld test equipment. IC Role / Device Role / Timing Role: Low-quiescent-current boost converter extending battery runtime while maintaining precise 15V rail accuracy. Use Value: Achieves >1000-hour shelf life on CR2032 due to 5µA shutdown current and 110µA active IQ. | Use Scenario: Replacing linear regulators or older PFM ICs in portable medical or IoT sensors needing 15V from single Li-ion cell. IC Role / Device Role / Timing Role: High-efficiency switching regulator optimized for wide load range (1mA–150mA) and low-noise operation. Use Value: Delivers 86% efficiency at full load and maintains >75% efficiency even at 1mA, minimizing heat and battery drain. |
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 |
|---|---|---|---|
| MAX761CPA+ | Fixed 12V output (vs. 15V); identical pinout, package, and feature set | Suitable where 12V flash programming or logic bias is required instead of 15V | Select MAX761CPA+ only when 12V output matches system voltage architecture |
| MAX772CPA+ | Drives external MOSFET; supports >500mA output and higher VOUT (up to 28V) | Used when higher current or voltage headroom is needed beyond MAX762CPA+'s 150mA/15V limit | Choose MAX772CPA+ for scalable designs requiring future current/voltage expansion |
Compared with MAX761CPA+, the MAX762CPA+ provides +3V higher fixed output for 15V-specific loads; compared with MAX772CPA+, it offers lower component count and smaller footprint but sacrifices drive capability and output flexibility.
Availability
MAX762CPA+ is available at Aetrix Electronics and suitable for flash memory programming, PCMCIA card power, and battery-powered instrumentation requiring stable component supply with long-term industrial availability.
Supply support for MAX762CPA+ 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, automotive, and computing applications.
The MAX76x family was engineered specifically for low-power, high-efficiency step-up conversion in portable and battery-critical systems-emphasizing ultra-low IQ, integrated power switches, and flexible operating modes.
FAQ
What is the minimum input voltage required for MAX762CPA+ to start up in bootstrapped mode?
The MAX762CPA+ guarantees start-up at 2.0V in bootstrapped mode when using internal feedback resistors (FB tied to GND). This is enabled by dedicated start-up circuitry that fixes duty cycle at 50% until V+ reaches 2.5V. Below 2.0V, the MAX762CPA+ will not initiate switching, regardless of load or external components.
Can MAX762CPA+ be configured for adjustable output voltage, and what resistor values are recommended?
Yes, the MAX762CPA+ supports adjustable output from 5V to 16.5V using external resistors R1 and R2 on the FB pin. Select R1 between 10kΩ and 250kΩ; R2 is calculated as R2 = R1 × (VOUT − 1.5)/1.5. For example, for 15V output, R1 = 100kΩ yields R2 ≈ 900kΩ. Use 1% tolerance resistors for best accuracy.
How does the low-battery detector in MAX762CPA+ operate, and what is its hysteresis?
The MAX762CPA+ low-battery detector compares LBI voltage to its internal 1.5V reference. When LBI falls below 1.5V, LBO goes low (open-drain). Hysteresis is 20mV-so rising trip occurs at ~1.52V-preventing chatter near threshold. R3 and R4 form a divider from V+ to GND to set VTRIP; R3 must be ≤500kΩ to limit leakage error.
What is the maximum switching frequency and corresponding inductor recommendation for MAX762CPA+?
The MAX762CPA+ operates up to 300kHz. An 18µH shielded ferrite inductor (e.g., Sumida CD54-180 or RCH855-180M) is recommended for most 5V-input applications. Inductor saturation current must exceed 1A peak, and DC resistance should be <100mΩ to maintain efficiency. Smaller inductors increase ripple; larger ones extend start-up time.
Does MAX762CPA+ require different external components for bootstrapped versus non-bootstrapped operation?
Yes. In bootstrapped mode (V+ connected to VOUT), FB is tied to GND for fixed 15V output, and no external feedback resistors are needed. In non-bootstrapped mode (V+ connected to VIN), external R1/R2 resistors are mandatory for output setting, and undervoltage lockout prevents start-up below ~2.7V. Diode and capacitor values remain identical in both configurations.
MAX762CPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX762CPA+ FAQ
1.How can I place an order for MAX762CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX762CPA+ 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 MAX762CPA+ reliable?
The price and inventory of MAX762CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX762CPA+ is usually 5 days.
3.What payment methods are accepted for MAX762CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX762CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX762CPA+?
MAX762CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX762CPA+ 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 MAX762CPA+?
For technical support, including MAX762CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX762CPA+ requirements.
6.How does Aetrix verify that MAX762CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX762CPA+ 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 MAX762CPA+ meets industry standards.
7.What is the process for return or replacement of MAX762CPA+?
All MAX762CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX762CPA+, 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 MAX762CPA+ part is unused and in its original packaging.
Return procedure for MAX762CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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