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Analog Devices Inc./Maxim Integrated MAX662ACSA+T
- Part No.:
- MAX662ACSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX662ACSA+T.pdf
- Description:
- IC REG CHARG PUMP 12V 30MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,809
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Product details
Overview
MAX662ACSA+T 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 0°C to +70°C in an 8-pin narrow SO package.
For engineers reviewing the MAX662ACSA+T datasheet, MAX662ACSA+T pinout, MAX662ACSA+T application, or MAX662ACSA+T 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 requirements.
Technical Context
The MAX662ACSA+T implements a pulse-skipping feedback control scheme that monitors VOUT and activates internal charge-pump switches (S1/S2) only when output voltage droops. Its oscillator runs at 500kHz nominal frequency, enabling efficient voltage tripling from VCC to VOUT via two external flying capacitors (C1, C2) and series switching.
During shutdown (SHDN = high), the device disables all switching and connects VCC to VOUT through a 1kΩ internal switch-ensuring VOUT decays to VCC in ~13ms. In active mode, it guarantees 30mA continuous output while maintaining 76% typical efficiency at VCC = 5V and IOUT = 30mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +12V ±5% - meets JEDEC-compliant flash VPP programming spec |
| Output Current | Guaranteed 30mA continuous - sufficient for byte-wide flash write/erase cycles |
| Input Voltage Range | 4.75V to 5.5V - compatible with standard 5V logic rails and tolerant of ±5% supply variation |
| Quiescent Current | 185µA - enables low-power system standby without external LDO |
| Shutdown Current | 0.5µA - allows microprocessor-controlled power gating with negligible leakage |
| Oscillator Frequency | 500kHz nominal - determines charge-pump switching rate and ripple frequency |
| Power Efficiency | 76% typical at 5V/30mA - reduces thermal load in compact PCB layouts |
Pinout & Package
MAX662ACSA+T is housed in an 8-pin narrow SO (Small Outline) package, 3.9mm × 4.9mm footprint, surface-mountable, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1− | Negative terminal of first flying capacitor | Return path for C1 during charging phase; must be short-traced to minimize ESR-induced loss |
| C1+ | Positive terminal of first flying capacitor | Node connected to S1/S2 switch matrix; critical for charge transfer timing integrity |
| C2− | Negative terminal of second flying capacitor | Common node between C1 and C2 during voltage-doubling/tripling sequence |
| C2+ | Positive terminal of second flying capacitor | High-side output of charge-pump stage feeding VOUT filter network |
| GND | Analog/digital ground reference | Single-point return for all internal circuitry; must connect directly to low-impedance PCB ground plane |
| VOUT | +12V regulated output | Supplies flash VPP; remains at VCC during shutdown due to internal 1kΩ pass switch |
| VCC | Main power input (4.75V–5.5V) | Source for both logic and charge-pump energy; bypass capacitor (C4) required within 5mm |
| SHDN | Active-high TTL/CMOS shutdown control | Pulled up internally to VCC; drive low for normal operation; rise/fall times < 100ns recommended |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates EMI-sensitive magnetics and simplifies layout-only four MLCC/tantalum caps needed |
| Logic-controlled shutdown | 0.5µA quiescent draw enables microprocessor-gated VPP activation without auxiliary enable circuitry |
| Guaranteed 30mA output | Validated across full 0°C to +70°C temperature range-no derating required for commercial applications |
| ±5% output regulation | Meets JEDEC-standard flash programming voltage tolerance without external feedback components |
| Surface-mount package | 8-pin narrow SO footprint fits sub-0.1in² board area-ideal for space-constrained embedded modules |
Applications
| Flash Memory Programming | Compact Op-Amp Bias Supply |
|---|---|
Use Scenario: Generating VPP for byte-wide flash EEPROM write/erase cycles in microcontroller-based data loggers. IC Role / Device Role / Timing Role: Regulated +12V high-voltage rail generator with microprocessor-controlled on/off timing via SHDN pin. Use Value: Enables precise flash programming without external DC-DC controller or inductor, reducing BOM count by ≥3 components. | Use Scenario: Providing clean +12V bias for rail-to-rail op-amps in portable sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Low-noise, capacitor-only boost supply delivering stable voltage under dynamic load transients. Use Value: Achieves 100mVpp ripple at 30mA load-sufficient for 12-bit precision analog front-ends without added LDO filtering. |
| MOSFET Gate Driving | Dual +12V/+20V Supply |
Use Scenario: Supplying gate drive voltage for N-channel MOSFETs in low-voltage (<6V) motor control H-bridges. IC Role / Device Role / Timing Role: Fast-turn-on +12V source synchronized to MCU PWM timing via SHDN edge control. Use Value: Reduces MOSFET RDS(on) by >40% versus 5V gate drive-improving conduction efficiency in battery-powered systems. | Use Scenario: Simultaneous generation of +12V and +20V rails from single 5V input in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Primary +12V regulator augmented with external diode-capacitor doubler to derive +20V secondary output. Use Value: Delivers up to 16mA at +20V while maintaining +12V at 30mA-enabling dual-voltage actuator interfaces without second IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge-pump boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX662ACPA+ | Same electrical specs, but in 8-pin plastic DIP package (larger footprint, through-hole mount) | Preferred for prototyping or legacy through-hole PCBs; not suitable for automated SMT assembly | Select MAX662ACPA+ only if DIP mounting is required; MAX662ACSA+T offers superior thermal performance and smaller area. |
| MAX734ESA+ | Switch-mode PWM topology; 120mA guaranteed output; requires inductor and diode | Higher-current flash programming or multi-device VPP distribution where >30mA is needed | Choose MAX734ESA+ when output current demand exceeds 30mA; MAX662ACSA+T remains optimal for single-byte flash with minimal BOM. |
Compared with MAX662ACPA+, MAX662ACSA+T provides identical regulation and shutdown behavior in a space-optimized SO package with better thermal dissipation. Against MAX734ESA+, it trades higher current capability for inductor-free simplicity and lower EMI-making MAX662ACSA+T ideal for compact, low-noise flash programming where 30mA suffices.
Availability
MAX662ACSA+T is available at Aetrix Electronics and suitable for flash memory programming, compact op-amp biasing, and MOSFET gate driving applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for MAX662ACSA+T 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, computing, and communications systems.
The MAX662A product line was designed specifically to replace inductor-based solutions in flash memory programming circuits-delivering regulated +12V with minimal external components and guaranteed current across commercial temperature ranges.
FAQ
What is the maximum continuous output current specification for the MAX662ACSA+T?
The MAX662ACSA+T guarantees 30mA continuous output current across its full operating temperature range (0°C to +70°C). Absolute maximum ratings permit brief intermittent peaks up to 50mA, but sustained operation above 30mA may cause output voltage droop beyond ±5% or thermal stress exceeding SO package limits. Designers should verify load profiles against the Efficiency vs. Load Current curve in the datasheet.
Does the MAX662ACSA+T require an external inductor?
No, the MAX662ACSA+T does not require an external inductor. It uses a capacitor-based charge-pump architecture with two external flying capacitors (C1, C2) and two filter capacitors (C4, C5). This eliminates magnetic components, reduces EMI, and enables ultra-compact layouts-key advantages over inductor-based switch-mode converters like the MAX734.
How does the SHDN pin function on the MAX662ACSA+T?
The SHDN pin on the MAX662ACSA+T is an active-high CMOS/TTL input internally pulled up to VCC. When driven low, the device operates normally; when driven high, it enters shutdown mode-halting all charge-pump switching and connecting VCC to VOUT via a 1kΩ internal switch. Output voltage decays to VCC in ~13ms, and resumes to +12V in ~400µs after SHDN goes low.
What capacitor values are recommended for stable operation of the MAX662ACSA+T?
For commercial-temperature operation, use 0.22µF ceramic or tantalum capacitors for C1 and C2 (flying caps), and 4.7µF for C4 (input bypass) and C5 (output filter). For extended/military temperature ranges, increase C1/C2 to 1.0µF tantalum. Ceramic C4/C5 can be reduced to 2µF/1µF respectively, but aluminum electrolytics require ≥10µF for each to maintain stability and ripple performance.
Is the MAX662ACSA+T pin-compatible with the original MAX662?
Yes, the MAX662ACSA+T is fully pin-compatible with the MAX662 and serves as a direct upgrade. It retains identical pinout, package dimensions, and functional behavior-including compatibility with existing PCB layouts. Key improvements include lower quiescent current (185µA vs. unspecified higher value), guaranteed 30mA output over temperature, and elimination of the optional C3 capacitor required in some MAX662 configurations.
MAX662ACSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX662ACSA+T FAQ
1.How can I place an order for MAX662ACSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX662ACSA+T 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 MAX662ACSA+T reliable?
The price and inventory of MAX662ACSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX662ACSA+T is usually 5 days.
3.What payment methods are accepted for MAX662ACSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX662ACSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX662ACSA+T?
MAX662ACSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX662ACSA+T 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 MAX662ACSA+T?
For technical support, including MAX662ACSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX662ACSA+T requirements.
6.How does Aetrix verify that MAX662ACSA+T is sourced from the original manufacturer or authorized distributors?
All MAX662ACSA+T 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 MAX662ACSA+T meets industry standards.
7.What is the process for return or replacement of MAX662ACSA+T?
All MAX662ACSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX662ACSA+T, 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 MAX662ACSA+T part is unused and in its original packaging.
Return procedure for MAX662ACSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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