MP1567DK-LF-Z Equivalent & Substitute Parts

Part Overview

The MP1567DK-LF-Z is a buck switching regulator IC from Monolithic Power Systems Inc., designed for positive adjustable step-down voltage regulation with 1.2A output current capability. This device operates across a 2.6V to 6V input range and delivers adjustable output voltage from 0.9V to 4.5V at 800kHz switching frequency with integrated synchronous rectification.

The MP1567DK-LF-Z carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product portfolio. For new applications or when inventory constraints exist, equivalent substitute parts with compatible electrical and mechanical characteristics are available.

Key Parameters

Parameter	Value
Manufacturer	Monolithic Power Systems Inc.
Function	Step-Down (Buck)
Output Configuration	Positive Adjustable
Input Voltage Range	2.6V – 6V
Output Voltage Range	0.9V – 4.5V
Output Current	1.2A
Switching Frequency	800kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C to 85°C (TA)
Package Type	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MP1567DK-LF-Z is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Buck topology with positive adjustable output configuration
Input voltage range overlap: minimum 2.6V, maximum 6V
Output voltage adjustability range: minimum 0.9V or lower, maximum 4.5V or higher
Output current rating: equal to or greater than 1.2A
Synchronous rectification capability
Operating temperature range: minimum -40°C, maximum 85°C or higher

Mechanical Compatibility Criteria:

Surface mount package type
Pin count and footprint compatibility
Moisture sensitivity level: MSL 1 or equivalent

Compliance Requirements:

RoHS3 compliance
REACH unaffected status

The MP2162AGQH-Z meets all electrical substitution criteria with enhanced specifications including higher output current (2A), wider output voltage range (0.6V – 6V), higher switching frequency (1.5MHz), and extended operating temperature range (-40°C to 125°C). The package transition from 10-MSOP to 8-QFN requires PCB layout redesign but maintains surface mount compatibility.

Parameter Comparison

Parameter	MP1567DK-LF-Z	MP2162AGQH-Z
Manufacturer	Monolithic Power Systems Inc.	Monolithic Power Systems
Product Status	Not For New Designs	Active
Function	Step-Down (Buck)	Step-Down (Buck)
Output Configuration	Positive Adjustable	Positive Adjustable
Input Voltage (Min)	2.6V	2.5V
Input Voltage (Max)	6V	6V
Output Voltage (Min)	0.9V	0.6V
Output Voltage (Max)	4.5V	6V
Output Current	1.2A	2A
Switching Frequency	800kHz	1.5MHz
Synchronous Rectifier	Yes	Yes
Operating Temperature (Min)	-40°C	-40°C
Operating Temperature (Max)	85°C (TA)	125°C (TJ)
Package Type	10-TFSOP, 10-MSOP	8-VFDFN (8-QFN 2x1.5)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The MP2162AGQH-Z is the manufacturer-recommended substitute for the MP1567DK-LF-Z. Selection of this substitute is justified by the following factors:

Product Lifecycle Status: The MP1567DK-LF-Z is designated "Not For New Designs," indicating end-of-life status. The MP2162AGQH-Z carries "Active" product status, ensuring long-term availability and manufacturer support.

Electrical Compatibility: The MP2162AGQH-Z maintains full backward compatibility with the MP1567DK-LF-Z across all critical electrical parameters. The substitute provides enhanced performance specifications including 67% higher output current (2A vs. 1.2A), wider output voltage range (0.6V – 6V vs. 0.9V – 4.5V), and 40°C higher maximum junction temperature rating (125°C vs. 85°C).

Compliance Certification: Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in equivalent applications.

Package Consideration: The transition from 10-MSOP to 8-QFN package requires PCB layout modification. The 8-QFN footprint (2mm × 1.5mm) is smaller than the 10-MSOP (3.00mm width), necessitating schematic and layout redesign. Pin assignment differences require verification against device datasheets prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the MP2162AGQH-Z directly replace the MP1567DK-LF-Z without PCB modification?

A: No. The MP2162AGQH-Z uses an 8-QFN package while the MP1567DK-LF-Z uses a 10-MSOP package. These packages have different footprints, pin counts, and pin assignments. PCB layout redesign is required.

Q: What are the key electrical differences between these parts?

A: The MP2162AGQH-Z provides higher output current (2A vs. 1.2A), lower minimum output voltage (0.6V vs. 0.9V), higher maximum output voltage (6V vs. 4.5V), higher switching frequency (1.5MHz vs. 800kHz), and extended operating temperature range (up to 125°C vs. 85°C).

Q: Are both parts RoHS compliant?

A: Yes. Both the MP1567DK-LF-Z and MP2162AGQH-Z are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Why is the MP1567DK-LF-Z marked "Not For New Designs"?

A: This designation indicates the part has been superseded in the manufacturer's product line. New designs should utilize the MP2162AGQH-Z or other active products from Monolithic Power Systems.

Q: Will the higher switching frequency of the MP2162AGQH-Z affect circuit performance?

A: The 1.5MHz switching frequency of the MP2162AGQH-Z (vs. 800kHz for the MP1567DK-LF-Z) allows for smaller external filter components and improved transient response. Circuit design must account for this frequency difference in component selection and PCB layout.

Q: Are there inventory considerations for these parts?

A: The MP1567DK-LF-Z has 1,386 pieces in stock as a legacy part. The MP2162AGQH-Z has 15,114 pieces in stock as an active product, providing superior long-term availability.

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