MP20045DQ-18-LF-Z Equivalent & Substitute Parts

Part Overview

The MP20045DQ-18-LF-Z is a linear voltage regulator IC from Monolithic Power Systems Inc., classified as a Power Management (PMIC) component. This device delivers a fixed 1.8V output at 1A maximum current in an 8-QFN (3x3) surface mount package. The part is currently active in production with 19,150 units in stock. Alternative part numbers may be required due to inventory constraints, supply chain considerations, or specific packaging preferences while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	1.8V
Maximum Output Current	1A
Maximum Input Voltage	5.5V
Maximum Dropout Voltage	0.28V @ 1A
Quiescent Current	110 µA
PSRR	56dB (1kHz)
Control Features	Enable, Power Good
Protection Features	Over Current, Over Temperature
Operating Temperature Range	-40°C to 125°C
Package Type	8-VDFN Exposed Pad (8-QFN 3x3)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

The MP20045DQ-18-LF-P is a parametric equivalent to the MP20045DQ-18-LF-Z. Both parts share identical electrical specifications and mechanical characteristics. The substitution is valid based on the following matching parameters:

Fixed output voltage of 1.8V
Maximum output current of 1A
Maximum input voltage of 5.5V
Dropout voltage of 0.28V @ 1A
Quiescent current of 110 µA
PSRR of 56dB (1kHz)
Identical control features (Enable, Power Good)
Identical protection features (Over Current, Over Temperature)
Operating temperature range of -40°C to 125°C
8-QFN (3x3) package configuration
Surface mount mounting type
ROHS3 compliance
MSL rating of 1

The only difference between these parts is the packaging format designation (LF-Z versus LF-P), which relates to tape and reel specifications rather than functional or electrical performance.

Parameter Comparison

Parameter	MP20045DQ-18-LF-Z	MP20045DQ-18-LF-P
Manufacturer	Monolithic Power Systems Inc.	Monolithic Power Systems Inc.
Category	Power Management (PMIC)	Power Management (PMIC)
Output Voltage	1.8V (Fixed)	1.8V (Fixed)
Output Current	1A	1A
Input Voltage (Max)	5.5V	5.5V
Dropout Voltage (Max)	0.28V @ 1A	0.28V @ 1A
Quiescent Current	110 µA	110 µA
PSRR	56dB (1kHz)	56dB (1kHz)
Control Features	Enable, Power Good	Enable, Power Good
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature
Operating Temperature	-40°C to 125°C	-40°C to 125°C
Package / Case	8-VDFN Exposed Pad	8-VDFN Exposed Pad
Supplier Device Package	8-QFN (3x3)	8-QFN (3x3)
Mounting Type	Surface Mount	Surface Mount
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS Code	8542.39.0001	8542.39.0001
Inventory Status	19,150 Pcs New Original In Stock	2,100 Pcs New Original In Stock

Engineering Selection Recommendations

Both MP20045DQ-18-LF-Z and MP20045DQ-18-LF-P are active production parts with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on inventory availability and supply chain requirements. The MP20045DQ-18-LF-Z maintains higher stock levels at 19,150 units, while the MP20045DQ-18-LF-P provides 2,100 units. Both parts carry MSL rating 1 (unlimited moisture sensitivity level), indicating no special storage or handling requirements. The identical electrical performance, protection features, and operating temperature range ensure direct functional interchangeability in applications requiring a 1.8V, 1A linear voltage regulator with enable and power good control functions.

Frequently Asked Questions (FAQ)

Q: Are MP20045DQ-18-LF-Z and MP20045DQ-18-LF-P electrically identical?

A: Yes. Both parts deliver identical electrical performance with 1.8V fixed output, 1A maximum current, 0.28V dropout voltage at 1A, 110 µA quiescent current, and 56dB PSRR at 1kHz. Control and protection features are identical.

Q: What is the difference between the LF-Z and LF-P designations?

A: The suffix designations relate to tape and reel packaging specifications. Both parts use identical 8-QFN (3x3) surface mount packages with exposed pads. The functional and electrical specifications remain unchanged.

Q: Can I substitute MP20045DQ-18-LF-P for MP20045DQ-18-LF-Z in production?

A: Yes. The parts are parametric equivalents with matching electrical specifications, operating temperature range, protection features, and package configuration. PCB layout and design requirements remain identical.

Q: What is the operating temperature range for both parts?

A: Both parts operate from -40°C to 125°C, supporting industrial and extended temperature applications.

Q: Are both parts RoHS compliant?

A: Yes. Both MP20045DQ-18-LF-Z and MP20045DQ-18-LF-P are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: What moisture sensitivity level applies to these parts?

A: Both parts carry MSL rating 1 (unlimited), indicating no moisture-related storage or handling restrictions.

Q: Do both parts include power good output?

A: Yes. Both parts feature Enable and Power Good control functions, allowing system monitoring and sequencing applications.

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