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MAX662ACSA-T
Analog Devices Inc./Maxim Integrated
IC REG CHRG PUMP 12V 30MA 8SOIC
407845 Pcs New Original In Stock
Charge Pump Switching Regulator IC Positive Fixed 12V 1 Output 30mA 8-SOIC (0.154", 3.90mm Width)
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (148 Ratings)
MAX662ACSA-T
Product Overview
6619849
DiGi Electronics Part Number
MAX662ACSA-T-DGManufacturer
Analog Devices Inc./Maxim Integrated
MAX662ACSA-T
Description
IC REG CHRG PUMP 12V 30MA 8SOICInventory
407845 Pcs New Original In Stock
Charge Pump Switching Regulator IC Positive Fixed 12V 1 Output 30mA 8-SOIC (0.154", 3.90mm Width)
Quantity
Minimum 1
Minimum 1
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MAX662ACSA-T Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
-
Series
-
Product Status
Obsolete
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)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
MAX662
Datasheet & Documents
HTML Datasheet
MAX662ACSA-T-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
MAXMAXMAX662ACSA-T
Q1146982B
2156-MAX662ACSA-T-MATR-DG
MAX662ACSAT
2156-MAX662ACSA-T
Standard Package
2,500
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
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Dec 02, 2025
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Dec 02, 2025
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Dec 02, 2025
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Dec 02, 2025
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Frequently Asked Questions (FAQ)
What are the key design risks when using the MAX662ACSA-T in a 5V-to-12V step-up application, and how can I mitigate output instability under light loads?
The MAX662ACSA-T, as a charge pump regulator without synchronous rectification, is prone to output voltage overshoot and poor regulation at light loads (<10mA) due to its open-loop architecture and reliance on external capacitors for energy transfer. This can stress downstream components expecting a stable 12V rail. To mitigate this, add a minimum dummy load (e.g., 1kΩ resistor) at the output or use a post-regulator LDO if precision is critical. Also ensure low-ESR ceramic capacitors (≥1µF) are placed close to the C1 and C2 pins to minimize parasitic inductance and improve transient response. Avoid long PCB traces between the IC and flying capacitors, as this increases ESR and reduces efficiency.
Can I replace the obsolete MAX662ACSA-T with a modern charge pump like the MAX1595 or TPS60240 in a legacy 5V-to-12V design without major circuit changes?
Direct replacement of the MAX662ACSA-T with the MAX1595 or TPS60240 is not recommended without evaluation. While all three are 5V-input charge pumps, the MAX1595 outputs 5.5V (not 12V), making it unsuitable. The TPS60240 from Texas Instruments can generate 12V but requires a different external capacitor configuration and operates at a higher switching frequency (1.5MHz), which may introduce EMI issues in sensitive analog circuits. Additionally, the TPS60240 uses a different pinout and requires careful layout adjustments. If redesigning, consider the MAX662AASA+ (if available) or migrate to a modern boost converter like the LT3460 for better efficiency and load regulation.
How does the MAX662ACSA-T’s lack of enable/shutdown pin impact power-sensitive designs, and what workarounds exist for battery-powered systems?
The MAX662ACSA-T lacks a shutdown or enable pin, meaning it continuously draws quiescent current (~150µA typical) even when the 12V output is unused—a significant drawback in battery-powered applications. To reduce standby power, implement an external low-side N-channel MOSFET between the input supply and the IC’s V+ pin, controlled by a microcontroller GPIO. Ensure the MOSFET has low RDS(on) and fast turn-off to minimize voltage drop and switching transients. Alternatively, use a load switch on the output side, though this doesn’t eliminate the IC’s internal bias current. For new designs, consider regulators with integrated enable functions, such as the MAX660A (3.3V to 5V/12V selectable) or modern PMICs with power gating.
What PCB layout practices are critical to prevent oscillation or efficiency loss when integrating the MAX662ACSA-T in a compact 8-SOIC footprint?
Due to the MAX662ACSA-T’s 500kHz switching frequency and reliance on precise charge transfer timing, poor PCB layout can cause oscillation, reduced efficiency, or excessive EMI. Keep the flying capacitors (C1 and C2) as close as possible to pins 1–2 and 7–8, using short, wide traces to minimize loop area and parasitic inductance. Place the output capacitor (Cout) near pin 5 with a direct ground return to the IC’s GND (pin 4). Avoid routing high-speed digital signals under or near the charge pump section. Use a solid ground plane beneath the device and ensure the 8-SOIC package’s thermal pad (if present) is properly connected to ground. These steps improve stability and help maintain the specified 30mA output capability without voltage droop.
Is the MAX662ACSA-T suitable for industrial environments given its 0°C to 70°C operating temperature range, and what derating should be applied for long-term reliability?
The MAX662ACSA-T is rated for commercial temperature range (0°C to 70°C), making it unsuitable for industrial applications exceeding 70°C ambient without significant derating. At elevated temperatures near the upper limit, output current capability may drop below 30mA due to increased internal switch resistance and capacitor leakage. For industrial use (up to 85°C), derate the output current by at least 20% and ensure adequate airflow or thermal relief. Additionally, the 8-SOIC package has limited thermal dissipation; consider adding copper pour on the PCB or migrating to a more robust alternative like the MAX662AASA+ (if available in industrial grade) or a hermetically sealed version. Always validate long-term reliability under actual thermal cycling conditions, especially since the part is obsolete and may lack updated qualification data.
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MAX662ACSA-T CAD Models
Analog Devices Inc./Maxim Integrated MAX662ACSA-T PCB symbols & footprints
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