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Analog Devices Inc./Maxim Integrated MAX662AEPA+
- Part No.:
- MAX662AEPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX662AEPA+.pdf
- Description:
- IC REG CHARG PUMP 12V 30MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,120
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Product details
Overview
MAX662AEPA+ from Maxim Integrated is a regulated +12V, 30mA charge-pump DC-DC converter designed for flash memory programming supplies. It delivers ±5% output regulation from 4.75V–5.5V input, requires no inductor, uses only four external capacitors, and operates across –40°C to +85°C.
For engineers reviewing the MAX662AEPA+ datasheet, MAX662AEPA+ pinout, MAX662AEPA+ application, or MAX662AEPA+ equivalent, key selection criteria include guaranteed 30mA output at ±5% regulation, 0.5µA shutdown current, 185µA quiescent current, and compatibility with byte-wide flash VPP programming in industrial temperature environments.
Technical Context
The MAX662AEPA+ implements a pulse-skipping feedback control scheme to regulate +12V output by dynamically adjusting charge-pump switching frequency based on load and input voltage. Its internal oscillator operates at 500kHz nominal frequency, enabling efficient voltage tripling via two external flying capacitors (C1, C2) and two storage capacitors (C4, C5).
It features TTL/CMOS-compatible active-high SHDN with internal VCC pull-up, connecting VOUT to VCC through a 1kΩ switch during shutdown. The device guarantees 30mA continuous output across its full –40°C to +85°C operating range, with 76% typical efficiency at 5V input and 30mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +12V ±5% - ensures reliable flash memory VPP programming within JEDEC-compliant tolerance |
| Output Current | 30mA guaranteed - sufficient for byte-wide flash programming pulses without derating |
| Input Voltage Range | 4.75V to 5.5V - compatible with standard 5V ±5% logic rails and industrial 5V supplies |
| Quiescent Current | 185µA - enables low-power standby in microprocessor-controlled programming sequences |
| Shutdown Current | 0.5µA - minimizes system leakage when flash is idle or in deep sleep mode |
| Oscillator Frequency | 500kHz nominal - determines charge-pump switching speed and ripple frequency for capacitor sizing |
| Operating Temperature | –40°C to +85°C - supports extended industrial applications without thermal derating |
Pinout & Package
The MAX662AEPA+ is housed in an 8-pin plastic DIP package (0.300" wide), with through-hole mounting and industry-standard lead spacing. Pin 1 is marked by a notch or dot, and the top-view pin numbering follows standard DIP orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1− | Negative terminal of first flying capacitor | Return path for C1 during charge phase; must be routed with minimal trace inductance |
| 2 C1+ | Positive terminal of first flying capacitor | Node connected to internal S1/S2 switches; critical for voltage tripling topology |
| 3 C2− | Negative terminal of second flying capacitor | Shared node with C1− during transfer phase; ties to internal switch matrix |
| 4 C2+ | Positive terminal of second flying capacitor | Series connection point with C1+ to generate boosted voltage; high dv/dt node |
| 5 VCC | Main power supply input | Accepts 4.75V–5.5V; requires local 4.7µF bypass (C4) adjacent to pin |
| 6 VOUT | +12V regulated output | Delivers up to 30mA; requires 4.7µF filter capacitor (C5) and low-ESR layout |
| 7 GND | Analog and power ground reference | Single-point return for all capacitors and internal circuitry; must connect to solid ground plane |
| 8 SHDN | Active-high shutdown control | CMOS/TTL-compatible; internally pulled up to VCC; tie to GND for normal operation |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates EMI-sensitive magnetics and simplifies layout-only four surface-mount capacitors required |
| Logic-controlled shutdown | Reduces supply current to 0.5µA while maintaining VOUT = VCC, enabling microprocessor-gated flash programming |
| Guaranteed output over temperature | 30mA minimum output maintained across –40°C to +85°C, removing need for thermal margining |
| Pin-compatible upgrade | Direct replacement for MAX662 with lower quiescent current and improved shutdown performance |
| Compact board footprint | Fits in <0.1 in² (645 mm²), supporting space-constrained embedded and portable designs |
Applications
| Flash Memory Programming | Op-Amp Bias Supply |
|---|---|
Use Scenario: Generating VPP for byte-wide flash EEPROM erase/write cycles in industrial controllers. IC Role / Device Role / Timing Role: Regulated +12V high-impedance programming supply, activated only during flash write windows. Use Value: Enables precise, low-noise VPP delivery without inductor-induced ringing or EMI, meeting JEDEC flash timing requirements. | Use Scenario: Providing compact +12V rail for rail-to-rail op-amps in portable test equipment. IC Role / Device Role / Timing Role: Low-quiescent, isolated bias source decoupled from main 5V logic supply. Use Value: Reduces system standby power by 185µA vs. linear regulators, extending battery life in handheld instruments. |
| MOSFET Gate Drive | Dual-Voltage Power Supply |
Use Scenario: Driving high-side N-channel MOSFETs in low-voltage (<6V) motor control H-bridges. IC Role / Device Role / Timing Role: Local +12V gate boost supply synchronized to PWM enable signals via SHDN pin. Use Value: Ensures full enhancement of 12V-rated MOSFETs even when main supply drops to 4.75V, improving conduction efficiency. | Use Scenario: Simultaneously generating +12V and +20V outputs from single 5V rail in mixed-signal data acquisition systems. IC Role / Device Role / Timing Role: Core charge-pump engine configured in dual-output topology using external diodes and capacitors. Use Value: Eliminates need for separate DC-DC converters-delivers 30mA @ +12V and up to 19mA @ +20V with shared components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge-pump DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX662ACPA+ | Same architecture but rated for 0°C to +70°C commercial temperature range; higher quiescent current (200µA typ) | Limited to non-industrial environments; unsuitable for extended ambient or automotive under-hood use | Select MAX662AEPA+ when operating outside 0°C–70°C or requiring lowest possible ICC |
| MAX734CPA+ | Switch-mode (PWM) topology; 120mA guaranteed output; requires inductor and diode; higher efficiency at >50mA loads | Supports higher-current flash families (e.g., page-programming devices); introduces EMI and layout complexity | Choose MAX734CPA+ only if >30mA sustained output is required and inductor-based design is acceptable |
Compared with MAX662ACPA+, the MAX662AEPA+ extends temperature range and reduces quiescent current; compared with MAX734CPA+, it trades higher output current for inductor-free simplicity and lower EMI-making MAX662AEPA+ optimal for space- and noise-constrained 30mA flash programming.
Availability
MAX662AEPA+ is available at Aetrix Electronics and suitable for flash memory programming, compact op-amp biasing, and MOSFET gate drive applications requiring stable component supply across industrial temperature ranges.
Supply support for MAX662AEPA+ 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 analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX662A product line delivers regulated charge-pump DC-DC conversion for flash memory programming and low-power biasing, emphasizing inductor-free design, tight output regulation, and robust industrial temperature operation.
FAQ
What is the operating temperature range of the MAX662AEPA+?
The MAX662AEPA+ is specified for operation from –40°C to +85°C. This extended industrial temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. Unlike the commercial-grade MAX662ACPA+, the MAX662AEPA+ guarantees 30mA output and ±5% regulation across this full range without derating. Its DIP package construction supports reliable thermal performance in demanding environments.
Does the MAX662AEPA+ require an inductor?
No, the MAX662AEPA+ does not require an inductor. It uses a charge-pump architecture with four external capacitors (two flying capacitors C1/C2 and two storage capacitors C4/C5) to generate +12V from a 4.75V–5.5V input. This inductor-free design eliminates magnetic components, reduces EMI, and simplifies PCB layout-confirmed in the General Description and Typical Operating Circuit diagrams. The absence of inductors is a defining feature distinguishing it from switch-mode alternatives like the MAX734.
How does the SHDN pin function on the MAX662AEPA+?
The SHDN pin on the MAX662AEPA+ is an active-high, TTL/CMOS-compatible control input that is internally pulled up to VCC. When pulled low (≤0.4V), the device operates normally; when driven high (≥2.4V), it enters shutdown mode, reducing supply current to 0.5µA and connecting VOUT to VCC through a 1kΩ internal switch. The datasheet specifies 400µs typical startup time after SHDN goes low, and 13ms typical VOUT decay to VCC upon shutdown entry-enabling precise microprocessor-gated flash programming.
What is the guaranteed output current for the MAX662AEPA+?
The MAX662AEPA+ guarantees 30mA of continuous output current across its full operating temperature range (–40°C to +85°C) and input voltage range (4.75V to 5.5V). This is explicitly stated in the General Description and confirmed in the Electrical Characteristics table under "Output Voltage" test conditions. The Absolute Maximum Rating for continuous output current is 50mA, but the guaranteed specification-critical for design margining-is 30mA, validated over temperature and process variation.
Can the MAX662AEPA+ be used in dual-output +12V/+20V configurations?
Yes, the MAX662AEPA+ can be configured to generate both +12V and +20V outputs from a single 5V input using the dual-output circuit shown in Figure 4 of the datasheet. This configuration adds two Schottky diodes (1N5818) and additional capacitors to derive +20V alongside the native +12V output. The datasheet confirms up to 19mA output capability at +20V when +12V is loaded with 34mA, making it suitable for mixed-voltage analog front-ends where space prohibits multiple converters.
MAX662AEPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 30mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX662AEPA+ FAQ
1.How can I place an order for MAX662AEPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX662AEPA+ 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 MAX662AEPA+ reliable?
The price and inventory of MAX662AEPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX662AEPA+ is usually 5 days.
3.What payment methods are accepted for MAX662AEPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX662AEPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX662AEPA+?
MAX662AEPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX662AEPA+ 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 MAX662AEPA+?
For technical support, including MAX662AEPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX662AEPA+ requirements.
6.How does Aetrix verify that MAX662AEPA+ is sourced from the original manufacturer or authorized distributors?
All MAX662AEPA+ 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 MAX662AEPA+ meets industry standards.
7.What is the process for return or replacement of MAX662AEPA+?
All MAX662AEPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX662AEPA+, 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 MAX662AEPA+ part is unused and in its original packaging.
Return procedure for MAX662AEPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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