PAM2805AF LED Driver IC Equivalent & Substitute Parts

Part Overview

The PAM2805AF is a LED Driver IC manufactured by Diodes Incorporated, designed as a 1-output DC-DC regulator with step-up (boost) topology. This component operates at 750mA output current with a 1MHz switching frequency and supports input voltages from 0.9V to 5.5V. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional compatibility while meeting the electrical and mechanical requirements of the original application.

Key Parameters

Parameter	PAM2805AF Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	0.9V
Voltage - Supply (Max)	5.5V
Current - Output / Channel	750mA
Frequency	1MHz
Internal Switch(s)	Yes
Package / Case	SOT-23-6 Thin, TSOT-23-6
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic for the PAM2805AF is based on the following critical parameters:

Primary Compatibility Criteria:

Topology: Step-Up (Boost) configuration
Number of Outputs: Single output (1)
Internal Switch: Integrated switching element required
Package Type: Surface mount with compatible pinout
Voltage Supply Range: Minimum 0.9V input capability preferred
Current Handling: Output/switch current ≥ 750mA
Operating Temperature: -40°C to 85°C minimum range
RoHS3 Compliance: Required for regulatory alignment

Substitute Categories:

Category A - Direct Topology Match (Step-Up/Boost): Parts maintaining step-up (boost) topology with comparable current ratings and voltage ranges. These provide the closest functional equivalence.

Category B - Alternative Topology (Step-Down/Buck): Parts using step-down (buck) topology. These are suitable only when application requirements permit topology change and output voltage specifications are compatible.

Category C - Enhanced Specifications: Parts exceeding PAM2805AF specifications in current capacity, voltage range, or temperature rating. These provide design margin and extended operational flexibility.

Parameter Comparison

Parameter	PAM2805AF	LM3410XMF/NOPB	LT3592IDDB#TRMPBF	MIC2282YMM-TR	MP2410AGJ-Z	MP3304BDD-LF-P	MPQ4425MGQB-Z	TPS61165DRVT
Manufacturer	Diodes Inc.	Texas Instruments	Analog Devices	Microchip	MPS Inc.	MPS Inc.	MPS Inc.	Texas Instruments
Topology	Step-Up (Boost)	SEPIC, Step-Up (Boost)	Step-Down (Buck)	Step-Up (Boost)	Step-Down (Buck)	Step-Up (Boost)	Step-Down (Buck)	Step-Up (Boost)
Number of Outputs	1	1	1	1	1	1	1	1
Voltage - Supply (Min)	0.9V	2.7V	3.6V	0.9V	4.2V	3V	4V	3V
Voltage - Supply (Max)	5.5V	5.5V	36V	15V	24V	6V	36V	18V
Current - Output / Channel	750mA	2.8A (Switch)	50mA, 500mA	1.1A (Switch)	2A	1.33A (Switch)	1.5A	1.2A (Switch)
Frequency	1MHz	1.6MHz	400kHz ~ 2.2MHz	20kHz	1MHz	2.2MHz	2.2MHz	1.2MHz
Internal Switch(s)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Package / Case	SOT-23-6 Thin, TSOT-23-6	SC-74A, SOT-753	10-WFDFN Exposed Pad	8-TSSOP, 8-MSOP	SOT-23-6 Thin, TSOT-23-6	8-TFDFN Exposed Pad	13-PowerVQFN	6-WDFN Exposed Pad
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitutes (Step-Up/Boost Topology):

MIC2282YMM-TR - Maintains step-up (boost) topology with 1.1A switch current and 0.9V minimum input voltage, matching the PAM2805AF's low-voltage input capability. Active product status with ROHS3 compliance. Operating temperature range -40°C to 85°C aligns with original specifications. 8-MSOP package requires PCB layout redesign.

MP3304BDD-LF-P - Step-up (boost) topology with 1.33A switch current and 3V to 6V input range. Active status with ROHS3 compliance. 2.2MHz switching frequency provides improved efficiency. 8-QFN package differs from original TSOT-23-6, requiring board redesign. Operating temperature -40°C to 85°C matches PAM2805AF.

TPS61165DRVT - Step-up (boost) topology with 1.2A switch current and 3V to 18V input range. Active product with ROHS3 compliance and automotive-grade qualification. 1.2MHz switching frequency near original specification. 6-WSON package requires layout modification. Operating temperature -40°C to 85°C matches original.

LM3410XMF/NOPB - SEPIC and step-up (boost) topology with 2.8A switch current providing design margin. Active status with ROHS3 compliance. Extended operating temperature -40°C to 125°C. 2.7V minimum input voltage (higher than PAM2805AF's 0.9V). SOT-23-5 package differs from original.

Alternative Substitutes (Step-Down/Buck Topology):

MP2410AGJ-Z - Step-down (buck) topology with 2A output current and 4.2V to 24V input range. Active status with ROHS3 compliance and extended temperature range -40°C to 125°C. TSOT-23-6 package matches original footprint, minimizing PCB redesign. Suitable when application permits topology change.

MPQ4425MGQB-Z - Step-down (buck) topology with 1.5A output current and 4V to 36V input range. Active status with automotive-grade qualification (AEC-Q100) and ROHS3 compliance. Extended temperature range -40°C to 125°C. 13-QFN package requires significant layout modification. Suitable for automotive applications with topology flexibility.

LT3592IDDB#TRMPBF - Step-down (buck) topology with 50mA and 500mA output options and 3.6V to 36V input range. Active status with ROHS3 compliance and extended temperature -40°C to 125°C. 10-DFN package differs from original. Suitable for lighting applications with topology flexibility.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PAM2805AF with any of these substitute parts?

A: Direct replacement depends on application topology requirements. MIC2282YMM-TR, MP3304BDD-LF-P, TPS61165DRVT, and LM3410XMF/NOPB maintain step-up (boost) topology and are functionally closest. MP2410AGJ-Z, MPQ4425MGQB-Z, and LT3592IDDB#TRMPBF use step-down (buck) topology and require application redesign verification. Package differences across all substitutes require PCB layout modification.

Q: What is the key difference between step-up (boost) and step-down (buck) topologies?

A: Step-up (boost) topology increases input voltage to produce higher output voltage, suitable for low-voltage input sources. Step-down (buck) topology reduces input voltage to produce lower output voltage. PAM2805AF uses step-up topology; substitutes using step-down topology are only compatible if application output voltage requirements permit topology change.

Q: Which substitute offers the best compatibility with PAM2805AF specifications?

A: MIC2282YMM-TR provides the closest electrical compatibility, maintaining step-up (boost) topology, 0.9V minimum input voltage, and -40°C to 85°C operating temperature range. However, the 8-MSOP package differs from the original TSOT-23-6, requiring PCB redesign. MP2410AGJ-Z offers identical TSOT-23-6 package footprint, eliminating PCB layout changes, but uses step-down (buck) topology.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the PAM2805AF regulatory status. All parts are also REACH unaffected and classified as EAR99 for export control purposes.

Q: What is the impact of different switching frequencies on circuit design?

A: PAM2805AF operates at 1MHz. Substitute parts range from 20kHz (MIC2282YMM-TR) to 2.2MHz (MP3304BDD-LF-P, MPQ4425MGQB-Z). Higher switching frequencies reduce inductor and capacitor sizes but increase switching losses. Lower frequencies reduce switching losses but require larger passive components. Frequency differences require recalculation of external component values (inductors, capacitors, resistors).

Q: Can I use a substitute with higher current rating than the original 750mA?

A: Yes. Substitutes with higher current ratings (LM3410XMF/NOPB at 2.8A, MP2410AGJ-Z at 2A, MP3304BDD-LF-P at 1.33A, MPQ4425MGQB-Z at 1.5A, TPS61165DRVT at 1.2A) provide design margin and improved thermal performance. However, external component ratings must be verified for compatibility with higher current levels.

Q: What package considerations are critical for substitution?

A: PAM2805AF uses SOT-23-6 (TSOT-23-6) package. Only MP2410AGJ-Z maintains this footprint. All other substitutes use different packages (SOT-23-5, 10-DFN, 8-MSOP, 8-QFN, 13-QFN, 6-WSON), requiring PCB layout redesign, component placement modification, and trace routing changes. Package selection impacts board space, thermal management, and manufacturing processes.

Q: Which substitute is recommended for automotive applications?

A: TPS61165DRVT and MPQ4425MGQB-Z carry automotive-grade qualifications. TPS61165DRVT maintains step-up (boost) topology with automotive qualification. MPQ4425MGQB-Z uses step-down (buck) topology with AEC-Q100 qualification. Selection depends on application topology requirements and output voltage specifications.

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