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Analog Devices Inc./Maxim Integrated MAX662AESA+TG077
- Part No.:
- MAX662AESA+TG077
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
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MAX662AESA+TG077.pdf
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Product details
Overview
MAX662AESA+TG077 from Maxim Integrated is a regulated +12V ±5%, 30mA charge-pump DC-DC converter designed for flash memory programming supplies. It operates from 4.75V–5.5V input, delivers guaranteed 30mA output without inductors, and features logic-controlled shutdown with 0.5µA quiescent current. Its 8-pin narrow SO package fits in <0.1in² board space.
For engineers reviewing the MAX662AESA+TG077 datasheet, MAX662AESA+TG077 pinout, MAX662AESA+TG077 application, or MAX662AESA+TG077 equivalent, key selection criteria include regulated +12V output tolerance, guaranteed 30mA load capability across –40°C to +85°C, shutdown current ≤10µA, oscillator frequency of 500kHz, and compatibility with standard 0.22µF ceramic charge-pump capacitors.
Technical Context
The MAX662AESA+TG077 implements a pulse-skipping feedback control scheme that monitors VOUT and activates internal charge pumps only when output voltage droops, enabling regulation without inductors. It uses two external 0.22µF capacitors (C1+, C1–, C2+, C2–) in a voltage-tripling configuration to generate +12V from 5V input.
Its shutdown function is TTL/CMOS-compatible with internal VCC pull-up; asserting SHDN high halts switching and connects VOUT to VCC via a 1kΩ internal switch. Startup time from shutdown is typically 400µs at VCC = 5V, and output settles to 12V ±5% under 30mA load with ≤100mV ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +12V ±5% - maintains flash VPP programming voltage within JEDEC-compliant tolerance across temperature and load |
| Output Current | Guaranteed 30mA - sufficient to program byte-wide flash memories such as Intel 28Fxxx and AMD Am29Fxxx families |
| Input Voltage Range | 4.75V to 5.5V - compatible with standard 5V ±5% logic supply rails without external regulation |
| Quiescent Current | 185µA - enables low-power standby in microprocessor-controlled programming sequences |
| Shutdown Current | 0.5µA max - reduces system power during idle periods while preserving fast wake-up response |
| Oscillator Frequency | 500kHz nominal - determines charge-pump switching rate and influences capacitor size and output ripple trade-offs |
| Efficiency | 76% typical at VCC = 5V, IOUT = 30mA - minimizes thermal rise in compact surface-mount layouts |
Pinout & Package
MAX662AESA+TG077 is housed in an 8-pin narrow SO (Small Outline) package, 2.184mm × 2.184mm die area, surface-mountable with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1– | Negative terminal of first charge-pump capacitor | Reference node for C1 during charging phase; must be connected directly to GND with minimal trace inductance |
| 2 C1+ | Positive terminal of first charge-pump capacitor | Node switched between VCC and series stack with C2; critical for voltage tripling path integrity |
| 3 C2– | Negative terminal of second charge-pump capacitor | Interconnect point between C1 and C2 in series configuration; sensitive to layout-induced noise coupling |
| 4 C2+ | Positive terminal of second charge-pump capacitor | Output-side node of C2; tied to VOUT during transfer phase to deliver boosted voltage |
| 5 VCC | Main power supply input | Accepts 4.75V–5.5V; requires local 4.7µF bypass capacitor (C4) placed adjacent to pin |
| 6 VOUT | +12V regulated output | Delivers up to 30mA; requires 4.7µF filter capacitor (C5) near pin to limit ripple to <100mV under full load |
| 7 GND | Ground reference | Common return for all internal circuits and external capacitors; must be low-impedance plane connection |
| 8 SHDN | Active-high shutdown control | CMOS/TTL-compatible; connect to GND for normal operation; internal VCC pull-up eliminates need for external resistor |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Enables fully surface-mount design using only four low-cost ceramic capacitors-eliminates EMI concerns and board space occupied by magnetics |
| Regulated +12V ±5% | Meets JEDEC flash programming voltage specifications without external feedback components or trimming |
| Logic-controlled shutdown | Reduces total system supply current to sub-microamp level during non-programming intervals, extending battery life in portable programmers |
| Guaranteed 30mA over –40°C to +85°C | Validated performance across industrial temperature range ensures reliable flash write cycles in embedded controllers and telecom modules |
| Pin-compatible upgrade to MAX662 | Allows drop-in replacement in legacy designs without PCB revision; removes need for optional C3 capacitor present in MAX662 |
Applications
| Flash Memory Programming | Compact Op-Amp Bias Supply |
|---|---|
Use Scenario: Microcontroller-driven programming of 8-bit parallel flash EEPROMs (e.g., SST39SFxx, AM29F040) requiring precise +12V VPP during write/erase cycles. IC Role / Device Role / Timing Role: Regulated high-voltage supply generator; activated only during programming windows via SHDN signal synchronized to firmware timing. Use Value: Eliminates need for discrete boost converters or transformer-based solutions, reducing BOM count and board area by >40% versus inductor-based alternatives. | Use Scenario: Providing clean +12V bias for rail-to-rail op-amps in space-constrained instrumentation front-ends where dual ±15V supplies are impractical. IC Role / Device Role / Timing Role: Auxiliary voltage rail generator; operates continuously but draws only 185µA quiescent current to minimize thermal drift in precision analog stages. Use Value: Enables single 5V supply systems to support op-amps requiring >10V headroom, with output ripple <100mV ensuring <0.01% THD in audio-grade signal paths. |
| MOSFET Gate Driving | Dual +12V/+20V Supply Generation |
Use Scenario: Driving high-side N-channel MOSFETs in low-voltage (<6V) motor control or power-switching applications where gate voltage must exceed drain potential. IC Role / Device Role / Timing Role: Local high-side gate voltage source; activated synchronously with PWM enable to ensure gate threshold margin during switching transitions. Use Value: Delivers 30mA peak current with <13ms VOUT decay time on shutdown-fast enough to maintain gate charge during brief PWM off-periods without external hold capacitors. | Use Scenario: Generating both +12V (for flash programming) and +20V (for EPROM erasure or specialized sensor bias) from a single 5V input in test equipment or field-programmable modules. IC Role / Device Role / Timing Role: Primary +12V source feeding a secondary voltage-doubler stage (using external diodes and caps); VOUT serves as input to +20V doubler circuit per Figure 4. Use Value: Achieves 16mA +20V output while maintaining +12V regulation-enables dual-voltage functionality without adding a second DC-DC IC or increasing component count beyond two diodes and one capacitor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated +12V charge-pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX662ACSA | Same functionality and pinout, but rated for 0°C to +70°C commercial temperature range only | Suitable for consumer-grade programmers or lab equipment not exposed to industrial ambient conditions | Select MAX662ACSA only if operating environment stays within 0°C–70°C; MAX662AESA+TG077 provides extended reliability for embedded deployments |
| MAX734CPA+ | Switch-mode PWM converter delivering 120mA at +12V; requires inductor and has higher EMI profile | Used where higher current (>30mA) or tighter load regulation under dynamic conditions is required | Choose MAX734CPA+ when flash arrays demand >30mA or when output impedance must remain <1Ω across 10Hz–1MHz; MAX662AESA+TG077 preferred for ultra-low-noise, inductor-free layouts |
Compared with MAX662ACSA, MAX662AESA+TG077 offers guaranteed operation down to –40°C and improved shutdown current (0.5µA vs. 1µA typical), making it suitable for automotive and industrial edge devices; versus MAX734CPA+, it trades higher current capability for zero-inductor simplicity and lower radiated emissions in dense PCB environments.
Availability
MAX662AESA+TG077 is available at Aetrix Electronics and suitable for flash memory programming, compact op-amp biasing, and MOSFET gate driving applications requiring stable component supply, long-term lifecycle support, and industrial temperature compliance.
Supply support for MAX662AESA+TG077 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 computing markets.
The MAX662AESA+TG077 belongs to Maxim's charge-pump DC-DC converter product line, engineered specifically to replace inductor-based solutions in flash memory programming and low-power high-voltage bias applications.
FAQ
What is the operating temperature range for the MAX662AESA+TG077?
The MAX662AESA+TG077 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. The 'E' grade suffix in MAX662AESA explicitly denotes this –40°C to +85°C rating, distinguishing it from the commercial-grade MAX662ACSA (0°C to +70°C). All electrical characteristics-including output voltage regulation, load current guarantee, and shutdown current-are validated across this full range.
Does the MAX662AESA+TG077 require an external capacitor C3 like the original MAX662?
No, the MAX662AESA+TG077 does not require the external C3 capacitor used in the MAX662. The Applications Information section explicitly states: "The MAX662A is a 100%-compatible upgrade of the MAX662. The MAX662A does not require capacitor C3, although its presence does not affect performance." This simplification reduces BOM count and improves layout flexibility while maintaining full functional equivalence and pin compatibility with legacy MAX662 designs.
What is the typical startup time for the MAX662AESA+TG077 after exiting shutdown mode?
The MAX662AESA+TG077 typically reaches 12V output within 400µs after SHDN transitions from high to low, assuming VCC = 5V and light load conditions (200µA), as shown in Figure 2 of the datasheet. Under full 30mA load, startup time remains well under 1ms due to the 500kHz oscillator and pulse-skipping control loop. This fast wake-up supports microprocessor-controlled flash programming sequences where VPP must be asserted rapidly and precisely timed to firmware write commands.
Can multiple MAX662AESA+TG077 devices be paralleled to increase output current?
Yes, two MAX662AESA+TG077 devices can be paralleled to increase output drive capability, as documented in the Applications Information section. VCC, VOUT, and GND pins may be connected together; SHDN pins should be tied to the same control signal. When placed close together, a single 4.7µF input bypass capacitor (C4) and a single 9.4µF output filter capacitor (C5) suffice. However, the absolute maximum continuous output current remains limited to 50mA total-exceeding this risks thermal overload even with paralleling.
What are the recommended external capacitor values for the MAX662AESA+TG077 in commercial-temperature applications?
For commercial-temperature applications (0°C to +70°C), the MAX662AESA+TG077 requires four external capacitors: C1 and C2 (charge-pump) at 0.22µF each (ceramic or tantalum), C4 (input bypass) at 4.7µF, and C5 (output filter) at 4.7µF. These values are specified in Figure 3a and confirmed in the Applications Information section. Using 0.22µF ceramics for C1/C2 ensures stable 500kHz operation and minimal board area; 4.7µF tantalum or low-ESR ceramic capacitors for C4/C5 limit output ripple to <100mV at 30mA load.
MAX662AESA+TG077 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
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- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
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MAX662AESA+TG077 FAQ
1.How can I place an order for MAX662AESA+TG077 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX662AESA+TG077 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 MAX662AESA+TG077 reliable?
The price and inventory of MAX662AESA+TG077 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX662AESA+TG077 is usually 5 days.
3.What payment methods are accepted for MAX662AESA+TG077?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX662AESA+TG077 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX662AESA+TG077?
MAX662AESA+TG077 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX662AESA+TG077 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 MAX662AESA+TG077?
For technical support, including MAX662AESA+TG077 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX662AESA+TG077 requirements.
6.How does Aetrix verify that MAX662AESA+TG077 is sourced from the original manufacturer or authorized distributors?
All MAX662AESA+TG077 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 MAX662AESA+TG077 meets industry standards.
7.What is the process for return or replacement of MAX662AESA+TG077?
All MAX662AESA+TG077 units undergo pre-shipment inspection (PSI). If there is an issue with MAX662AESA+TG077, 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 MAX662AESA+TG077 part is unused and in its original packaging.
Return procedure for MAX662AESA+TG077:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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