MAX1044EPA Equivalent & Substitute Parts

Part Overview

The MAX1044EPA is a charge pump switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated, designed for power management applications requiring voltage inversion or multiplication. This 8-DIP through-hole component generates positive or negative fixed output voltages (-Vin, nVin, or Vin/2) with a 20mA output current capability and 10kHz switching frequency. The MAX1044EPA is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives from multiple manufacturers provide compatible functionality with improved availability and compliance status.

Key Parameters

Parameter	MAX1044EPA
Manufacturer	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Voltage - Input (Min)	1.5V
Voltage - Input (Max)	10V
Voltage - Output (Min/Fixed)	-Vin, nVin, Vin/2
Current - Output	20mA
Frequency - Switching	10kHz
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the MAX1044EPA are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Package compatibility: 8-DIP (0.300", 7.62mm) through-hole mounting
Input voltage range: 1.5V to 10V minimum overlap
Output voltage configuration: Support for negative output (-Vin) or equivalent functionality
Output current: 20mA or greater
Switching frequency: 10kHz operation
Operating temperature range: -40°C to 85°C

Substitute parts are grouped into two categories based on output configuration capability:

Category 1 - Full Functional Equivalents: Parts supporting positive or negative output configurations matching the MAX1044EPA's versatility (MAX1044EPA+, TC7660EPA, TL7660CP).

Category 2 - Negative Output Specialists: Parts optimized for negative output generation with compatible electrical parameters (LMC7660IN/NOPB, TC1044SEPA).

Category 3 - Enhanced Performance Alternative: Parts with higher output current capability and extended voltage range (LT1054IP).

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Vin Min	Vin Max	Output Config	Iout	Fsw	Temp Range	RoHS Status
MAX1044EPA	Analog Devices/Maxim	Obsolete	8-DIP	1.5V	10V	Pos/Neg	20mA	10kHz	-40 to 85°C	Non-compliant
MAX1044EPA+	Analog Devices/Maxim	Active	8-DIP	1.5V	10V	Pos/Neg	20mA	10kHz	-40 to 85°C	ROHS3 Compliant
TC7660EPA	Microchip Technology	Active	8-DIP	1.5V	10V	Pos/Neg	20mA	10kHz	-40 to 85°C	ROHS3 Compliant
TL7660CP	Texas Instruments	Active	8-DIP	1.5V	10V	Pos/Neg	Not specified	10kHz	-40 to 85°C	ROHS3 Compliant
LMC7660IN/NOPB	Texas Instruments	Active	8-DIP	1.5V	10V	Negative	Not specified	10kHz	Not specified	ROHS3 Compliant
TC1044SEPA	Microchip Technology	Active	8-DIP	1.5V	12V	Negative	20mA	10kHz, 45kHz	-40 to 85°C	ROHS3 Compliant
LT1054IP	Texas Instruments	Active	8-DIP	4.6V	15V	Pos/Neg	100mA	25kHz	-40 to 85°C	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - MAX1044EPA+: Direct successor from the original manufacturer with identical electrical specifications, same 8-DIP package, and ROHS3 compliance. Recommended for designs requiring exact form-factor and functional replacement with modern compliance status.

Recommended Alternative - TC7660EPA: Microchip Technology equivalent offering identical input/output voltage ranges, 20mA output current, and 10kHz switching frequency in the same 8-DIP package. ROHS3 compliant with active product status and strong inventory availability.

High-Volume Alternative - TL7660CP: Texas Instruments charge pump regulator with matching voltage specifications and 10kHz operation in 8-DIP package. Largest inventory availability (101,280 units) among active substitutes. Output current not specified; verify application requirements before selection.

Negative Output Specialist - TC1044SEPA: Microchip Technology option optimized for negative voltage generation with 20mA output current and extended input voltage range to 12V. Supports dual switching frequencies (10kHz, 45kHz). Suitable for applications requiring only negative output configuration.

Enhanced Performance Option - LT1054IP: Texas Instruments charge pump with significantly higher 100mA output current and extended voltage range (4.6V to 15V input). Increased switching frequency (25kHz) and adjustable output capability. Requires minimum 4.6V input; not suitable for applications requiring 1.5V operation.

Limited Compatibility - LMC7660IN/NOPB: Texas Instruments negative-output-only regulator with 1.5V to 10V input range. Output current and operating temperature range not specified in available data. Use only when negative output configuration is the sole requirement and current specifications are verified through manufacturer documentation.

Frequently Asked Questions (FAQ)

Q: Can MAX1044EPA+ be used as a direct replacement for MAX1044EPA?

A: Yes. MAX1044EPA+ is the active production equivalent with identical electrical specifications, package, and pinout. The primary difference is ROHS3 compliance status. No circuit modifications are required.

Q: What is the key difference between parts supporting "Positive or Negative" output versus "Negative" only output?

A: Parts with "Positive or Negative" output configuration (MAX1044EPA+, TC7660EPA, TL7660CP, LT1054IP) can generate either positive or negative voltage outputs through external component selection. Parts with "Negative" output only (LMC7660IN/NOPB, TC1044SEPA) are optimized for negative voltage generation and cannot produce positive outputs. Select based on your specific application requirements.

Q: Is TC1044SEPA compatible with applications requiring 1.5V input operation?

A: Yes. TC1044SEPA supports 1.5V minimum input voltage, matching the MAX1044EPA specification. The extended maximum input range to 12V provides additional design flexibility.

Q: Why does LT1054IP require 4.6V minimum input while other substitutes operate at 1.5V?

A: LT1054IP is designed for higher output current applications (100mA versus 20mA) and includes step-up topology capability. The 4.6V minimum input reflects this enhanced performance class. Use LT1054IP only in applications where input voltage exceeds 4.6V.

Q: Are all substitute parts available in the same 8-DIP package?

A: Yes. All listed substitute parts use 8-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical compatibility with existing PCB layouts designed for MAX1044EPA.

Q: What is the compliance advantage of selecting an active product over the obsolete MAX1044EPA?

A: All active substitute parts (MAX1044EPA+, TC7660EPA, TC1044SEPA, TL7660CP, LMC7660IN/NOPB, LT1054IP) carry ROHS3 compliance certification. The obsolete MAX1044EPA is RoHS non-compliant. ROHS3 compliance is required for products sold in regulated markets and ensures restriction of hazardous substances.

Q: Which substitute offers the best inventory availability?

A: TL7660CP from Texas Instruments has the highest inventory level at 101,280 units in stock, followed by MAX1044EPA+ at 65,325 units. Both are suitable for high-volume production requirements.

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