LDS8711 LED Driver IC Equivalent & Substitute Parts

Part Overview

The LDS8711 is an LED Driver IC manufactured by IXYS Integrated Circuits Division, designed for single-output DC-DC regulator applications with step-up (boost) topology and PWM dimming capability. This component operates at 700kHz with a maximum output current of 32mA and supports input voltage ranges from 2.7V to 5.5V. The device is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity.

Key Parameters

Parameter	LDS8711 Value
Manufacturer	IXYS Integrated Circuits Division
Product Status	Obsolete
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	2.7V
Voltage - Supply (Max)	5.5V
Current - Output / Channel	32mA
Frequency	700kHz
Dimming	PWM
Applications	Backlight
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-WFDFN Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LDS8711 is determined by the following critical parameters:

Primary Compatibility Criteria:

DC-DC Regulator topology: Step-Up (Boost) configuration
Single output channel
Input voltage range: minimum 2.7V, maximum 5.5V
PWM dimming capability
Output current capability: minimum 32mA
Operating temperature range: -40°C to 85°C or wider
Surface mount packaging
RoHS3 compliance

Substitution Logic: Substitute parts must maintain the same functional topology (step-up boost converter) and support the specified input voltage window. Output current capability must equal or exceed 32mA. PWM dimming is required for backlight applications. All substitute parts listed are active products with current manufacturing status, ensuring long-term availability compared to the obsolete LDS8711.

Parameter Comparison

Part Number	Manufacturer	Product Status	Topology	Voltage Supply Min	Voltage Supply Max	Current Output (mA)	Frequency (MHz)	Dimming	Operating Temp (°C)	Package
LDS8711	IXYS	Obsolete	Step-Up (Boost)	2.7V	5.5V	32	0.7	PWM	-40 ~ 85	8-WFDFN
LT1937ES5#TRPBF	Analog Devices Inc.	Active	Step-Up (Boost)	2.5V	10V	320	1.2	Analog, PWM	-40 ~ 85	TSOT-23-5
LT3498EDDB#TRPBF	Analog Devices Inc.	Active	Step-Up (Boost)	2.5V	12V	20	2.3	Analog, PWM	-40 ~ 85	12-DFN (3x2)
MCP1662T-E/OT	Microchip Technology	Active	Step-Up (Boost)	2.4V	5.5V	200	0.5	PWM	-40 ~ 125	SOT-23-5
MIC2291-15YML-TR	Microchip Technology	Active	Step-Up (Boost)	2.5V	10V	1200	1.2	Analog, PWM	-40 ~ 125	8-MLF® (2x2)
MIC2297-42YML-TR	Microchip Technology	Active	Step-Up (Boost)	2.5V	10V	1200	0.6	PWM	-40 ~ 125	10-MLF® (3x3)
MIC2299-15YML-TR	Microchip Technology	Active	Step-Up (Boost)	2.5V	10V	3500	2.0	Analog	-40 ~ 125	12-MLF™ (3x3)
MIC3223YTSE-TR	Microchip Technology	Active	Step-Up (Boost)	4.5V	20V	3500	1.0	PWM	-40 ~ 125	16-TSSOP-EP
LM3410XMY/NOPB	Texas Instruments	Active	SEPIC, Step-Up (Boost)	2.7V	5.5V	2800	1.6	PWM	-40 ~ 125	8-HVSSOP
LM3565TLX/NOPB	Texas Instruments	Active	Step-Up (Boost)	2.5V	5.5V	930	4.0	PWM	-30 ~ 85	16-DSBGA (2.5x2.12)
LM3642TLX/NOPB	Texas Instruments	Active	Step-Up (Boost)	2.5V	5.5V	1500	4.0	I2C	-40 ~ 85	9-DSBGA (1.6x1.6)

Engineering Selection Recommendations

All substitute parts listed are active products with current manufacturing status, providing superior long-term availability compared to the obsolete LDS8711. Selection should be based on the following engineering criteria:

For Direct Backlight Applications with Minimal Design Changes: MCP1662T-E/OT and LT1937ES5#TRPBF are the closest functional equivalents, maintaining PWM dimming, similar input voltage ranges (2.4V–5.5V and 2.5V–10V respectively), and operating temperature ranges compatible with -40°C to 85°C specifications. Both are RoHS3 compliant with MSL 1 rating.

For Higher Current Capability: MIC2291-15YML-TR, MIC2297-42YML-TR, and LM3410XMY/NOPB provide significantly higher output current (1.2A to 2.8A), enabling designs with greater power delivery while maintaining the 2.7V–5.5V input window. These are suitable for applications requiring current scaling beyond the original 32mA specification.

For Extended Operating Temperature Range: Microchip Technology parts (MIC2291, MIC2297, MIC2299, MIC3223) and Texas Instruments parts (LM3410, LM3565, LM3642) support -40°C to 125°C operating ranges, providing thermal margin for demanding environments.

Compliance Verification: All substitute parts maintain RoHS3 compliance and REACH unaffected status, matching the regulatory posture of the original LDS8711. MSL ratings are 1 (unlimited) for most parts, with MIC3223YTSE-TR rated MSL 3 (168 hours), requiring appropriate moisture control during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LDS8711 with any of these substitute parts without PCB redesign?

A: Direct pin-for-pin replacement is not possible due to package differences. LDS8711 uses 8-WFDFN, while substitutes employ various packages (SOT-23-5, DFN, MLF, HVSSOP, DSBGA, TSSOP). PCB layout modifications are required. However, functional substitution is achievable with circuit redesign to accommodate the selected alternative's pinout and electrical characteristics.

Q: Which substitute maintains the closest electrical performance to LDS8711?

A: MCP1662T-E/OT and LT1937ES5#TRPBF provide the closest functional match. Both support the 2.4V–5.5V input range, include PWM dimming, and operate within the -40°C to 85°C temperature window. MCP1662T-E/OT specifically targets backlight applications with 200mA output current, exceeding the original 32mA specification while maintaining similar frequency operation (500kHz vs. 700kHz).

Q: Are there substitutes with identical package footprints?

A: No. The LDS8711 8-WFDFN package is not matched by any listed substitute. The closest compact alternatives are LT1937ES5#TRPBF (TSOT-23-5) and MIC2291-15YML-TR (8-MLF), both offering minimal footprint increases suitable for space-constrained designs.

Q: What is the impact of switching from PWM-only dimming to Analog/PWM dimming?

A: Substitutes offering both analog and PWM dimming (LT1937ES5#TRPBF, LT3498EDDB#TRPBF, MIC2291-15YML-TR) provide design flexibility. PWM dimming remains fully supported; analog dimming is an additional capability. Existing PWM dimming circuits will function without modification.

Q: Do all substitutes support the same input voltage range as LDS8711 (2.7V–5.5V)?

A: Most substitutes support 2.5V minimum input, which is compatible with 2.7V operation. However, MIC3223YTSE-TR requires 4.5V minimum input and is unsuitable for 2.7V applications. Verify minimum input voltage requirements against your specific power supply specifications.

Q: What are the moisture sensitivity implications for assembly and storage?

A: LDS8711 and most substitutes carry MSL 1 (unlimited) rating, requiring no special moisture control. MIC3223YTSE-TR is rated MSL 3 (168 hours), requiring dry-pack storage and bake-out procedures before reflow soldering. Consult component datasheets for specific moisture handling requirements.

Q: Can I use higher-current substitutes in a design originally specified for 32mA output?

A: Yes. Higher-current parts (MIC2291, MIC2297, MIC2299, LM3410, LM3565, LM3642) are backward-compatible for lower-current applications. The design will operate safely at reduced current levels. Verify that output voltage regulation and feedback network design remain compatible with the selected substitute's control architecture.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message