ZXCL260E5 Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The ZXCL260E5 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed for positive fixed output regulation at 2.6V with 150mA output current in SOT-23-5 surface mount packaging. This device is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain compatibility across output voltage, current capacity, dropout voltage, control features, and protection mechanisms while accommodating minor variations in quiescent current and PSRR characteristics.

Key Parameters

Parameter	ZXCL260E5 Value
Manufacturer	Diodes Incorporated
Output Voltage (Fixed)	2.6V
Output Current	150mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.31V @ 100mA
Quiescent Current (Iq)	50 µA
Control Features	Enable
Protection Features	Over Current, Over Temperature
Operating Temperature Range	-40°C ~ 85°C
Package Type	SOT-23-5 (SC-74A, SOT-753)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ZXCL260E5 are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Output voltage within ±0.25V of 2.6V (range: 2.5V to 2.85V acceptable)
Output current capacity ≥150mA
Maximum input voltage ≥5.5V
Dropout voltage ≤0.4V at rated current
Enable control feature present
Over current and over temperature protection
SOT-23-5 or compatible surface mount package
RoHS3 compliance
MSL rating ≤3

Secondary Considerations:

Quiescent current variations (25 µA to 60 µA acceptable)
PSRR performance (when specified)
Operating temperature range extensions (up to 125°C acceptable)
Product status (active preferred over obsolete)

Substitute parts are organized into two categories: direct parametric equivalents and manufacturer-recommended alternatives with enhanced specifications.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Iq (µA)	Package	Product Status	Temp Range
ZXCL260E5	Diodes Incorporated	2.6V	150mA	5.5V	0.31V @ 100mA	50	SOT-23-5	Obsolete	-40°C ~ 85°C
BU26TD3WG-TR	Rohm Semiconductor	2.6V	200mA	6V	0.54V @ 200mA	60	5-SSOP	Active	-40°C ~ 85°C
LP5907MFX-2.8/NOPB	Texas Instruments	2.8V	250mA	5.5V	0.25V @ 250mA	25	SOT-23-5	Active	-40°C ~ 125°C
LP5907MFX-2.85/NOPB	Texas Instruments	2.85V	250mA	5.5V	0.25V @ 250mA	25	SOT-23-5	Active	-40°C ~ 125°C
LP5951MFX-2.5/NOPB	Texas Instruments	2.5V	150mA	5.5V	0.35V @ 150mA	55	SOT-23-5	Active	-40°C ~ 125°C
MIC5365-2.85YD5-T5	Microchip Technology	2.85V	150mA	5.5V	0.31V @ 150mA	39	TSOT-23-5	Active	-40°C ~ 125°C
MIC5365-2.85YD5-TR	Microchip Technology	2.85V	150mA	5.5V	0.31V @ 150mA	39	TSOT-23-5	Active	-40°C ~ 125°C
MIC5365-2.8YD5-T5	Microchip Technology	2.8V	150mA	5.5V	0.31V @ 150mA	39	TSOT-23-5	Active	-40°C ~ 125°C
MIC5365-2.8YD5-TR	Microchip Technology	2.8V	150mA	5.5V	0.31V @ 150mA	39	TSOT-23-5	Active	-40°C ~ 125°C
RT9013-25GB	Richtek USA Inc.	2.5V	500mA	5.5V	0.4V @ 500mA	50	SOT-23-5	Active	-40°C ~ 85°C

Engineering Selection Recommendations

Direct Parametric Equivalents (Closest Match):

MIC5365-2.8YD5-T5 and MIC5365-2.8YD5-TR are the closest functional equivalents to ZXCL260E5. Both devices maintain 2.8V output voltage (within acceptable tolerance of 2.6V), 150mA output current, 5.5V maximum input voltage, and identical 0.31V dropout voltage specification at 150mA. These parts feature active product status, ROHS3 compliance, MSL rating 1, and extended operating temperature range to 125°C. The primary difference is packaging designation (TSOT-23-5 vs. SOT-23-5), which maintains mechanical and electrical compatibility. Quiescent current is reduced to 39 µA compared to the original 50 µA, providing improved power efficiency.

Alternative with Exact Output Voltage Match:

BU26TD3WG-TR from Rohm Semiconductor provides exact 2.6V output voltage matching but with increased output current capacity (200mA vs. 150mA) and slightly higher dropout voltage (0.54V @ 200mA). This part is active and RoHS3 compliant. The 5-SSOP package differs from SOT-23-5, requiring PCB layout verification for pin compatibility and thermal performance.

Higher Current Capacity Option:

LP5907MFX-2.8/NOPB and LP5907MFX-2.85/NOPB from Texas Instruments offer 250mA output current with superior dropout voltage performance (0.25V @ 250mA) and extended temperature range to 125°C. Output voltage deviation (2.8V or 2.85V) is within acceptable tolerance. These devices maintain SOT-23-5 packaging and active product status. Quiescent current is significantly reduced to 25 µA.

Exact Current Match with Lower Output Voltage:

LP5951MFX-2.5/NOPB maintains 150mA output current and SOT-23-5 packaging with active status and extended temperature range. Output voltage is 2.5V (0.1V below original specification), acceptable for applications with voltage tolerance margins. Dropout voltage is 0.35V @ 150mA.

High Current Capacity Option:

RT9013-25GB provides 500mA output current in SOT-23-5 packaging with 2.5V output voltage. This part is active, RoHS3 compliant, and maintains identical operating temperature range to the original device. MSL rating is 3 (168 hours), requiring moisture control during storage and handling.

All recommended substitutes maintain enable control feature and over current/over temperature protection. Selection should be based on specific application requirements for output voltage tolerance, current demand, dropout voltage performance, and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can MIC5365-2.8YD5-TR directly replace ZXCL260E5 without PCB modifications?

A: MIC5365-2.8YD5-TR uses TSOT-23-5 packaging while ZXCL260E5 uses SOT-23-5. Both are surface mount packages with identical pin counts and compatible pinouts. PCB footprint verification is required, as TSOT-23-5 may have slightly different dimensional specifications. Electrical functionality is fully compatible.

Q: What is the significance of the 0.2V output voltage difference between ZXCL260E5 (2.6V) and LP5907MFX-2.8/NOPB (2.8V)?

A: The 0.2V difference represents approximately 7.7% voltage deviation. Substitution is valid only if the application circuit tolerates this voltage variation. Circuits with tight voltage regulation requirements or dependent on specific 2.6V thresholds may require design review. Applications with ±5% or greater voltage tolerance margins can accommodate this substitute without functional impact.

Q: Why does BU26TD3WG-TR have higher dropout voltage (0.54V @ 200mA) compared to ZXCL260E5 (0.31V @ 100mA)?

A: Dropout voltage increases with output current. BU26TD3WG-TR is specified at 200mA output current versus ZXCL260E5 at 100mA. The higher current demand results in greater voltage drop across the internal pass transistor. For applications requiring only 150mA, actual dropout voltage performance of BU26TD3WG-TR would be lower than the specified maximum at 200mA.

Q: Is the reduced quiescent current in MIC5365 and LP5907 series beneficial?

A: Lower quiescent current (25-39 µA vs. 50 µA) reduces standby power consumption and heat generation, particularly in battery-powered or thermally constrained applications. This is a performance improvement over the original ZXCL260E5 with no functional disadvantage.

Q: Can RT9013-25GB be used in applications requiring exactly 150mA output current?

A: Yes. RT9013-25GB is rated for 500mA maximum output current, meaning it can reliably deliver 150mA. The higher current rating provides design margin and thermal headroom. This substitution is valid for current-limited applications.

Q: What does MSL rating 3 on RT9013-25GB mean for component handling?

A: MSL (Moisture Sensitivity Level) 3 requires moisture control during storage and handling. Components must be stored in dry conditions and baked before reflow soldering if exposed to humidity exceeding specified limits (168 hours at 85°C/85% RH). ZXCL260E5 and most recommended substitutes have MSL 1 (unlimited), requiring no special moisture handling.

Q: Are all substitute parts RoHS3 compliant like the original ZXCL260E5?

A: Yes. All recommended substitute parts listed maintain ROHS3 compliance, ensuring compatibility with RoHS-regulated supply chains and end-use applications.

Q: What is the practical difference between cut tape and tape & reel packaging options?

A: Cut tape (CT) packaging is supplied in shorter lengths for lower-volume applications, while tape & reel (TR) packaging provides continuous reels for automated assembly lines. Electrical and functional specifications are identical. Selection depends on production volume and assembly equipment compatibility.

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