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LM3524DM
Texas Instruments
IC REG CTRLR BUCK/BOOST 16SOIC
88280 Pcs New Original In Stock
Buck, Boost Regulator Positive or Negative Output Step-Up, Step-Down DC-DC Controller IC 16-SOIC
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (280 Ratings)
LM3524DM
Product Overview
1314435
DiGi Electronics Part Number
LM3524DM-DGManufacturer
Texas Instruments
LM3524DM
Description
IC REG CTRLR BUCK/BOOST 16SOICInventory
88280 Pcs New Original In Stock
Buck, Boost Regulator Positive or Negative Output Step-Up, Step-Down DC-DC Controller IC 16-SOIC
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LM3524DM Technical Specifications
Category
Power Management (PMIC), DC DC Switching Controllers
Packaging
-
Series
-
Product Status
Obsolete
Output Type
Transistor Driver
Function
Step-Up, Step-Down
Output Configuration
Positive or Negative
Topology
Buck, Boost
Number of Outputs
1
Output Phases
1
Voltage - Supply (Vcc/Vdd)
8V ~ 40V
Frequency - Switching
-
Duty Cycle (Max)
49%
Synchronous Rectifier
No
Clock Sync
No
Serial Interfaces
-
Control Features
Current Limit, Enable, Frequency Control
Operating Temperature
0°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.154", 3.90mm Width)
Supplier Device Package
16-SOIC
Base Product Number
LM3524
Datasheet & Documents
HTML Datasheet
LM3524DM-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
2156-LM3524DM-TI
TEXTISLM3524DM
Standard Package
48
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
他們採用環保材料的包裝不僅環保，也很有質感，快遞速度也很快，超乎預期的滿意。
de desembre 02, 2025
Dank der zuverlässigen Betreuung durch DiGi Electronics konnten wir unsere Prozesse effizient gestalten.
de desembre 02, 2025
The logistical tracking system updates me instantly about any shipment status change.
de desembre 02, 2025
Their logistics tracking is detailed and accurate, giving me peace of mind about my deliveries.
de desembre 02, 2025
Their commitment to affordability and customer care is what keeps me coming back.
de desembre 02, 2025
I am always confident buying from DiGi Electronics thanks to their reliable support.
de desembre 02, 2025
Their shipping process is swift and hassle-free.
de desembre 02, 2025
Delivered surprisingly quickly, and I can attest to the fact that their devices are built to last.
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Frequently Asked Questions (FAQ)
Can the LM3524DM be safely replaced with an LM3524DM/NOPB in an existing buck-boost design, and what are the key reliability risks if the original board was built for the non-RoHS version?
Yes, the LM3524DM/NOPB is a direct functional and pin-compatible RoHS-compliant replacement for the LM3524DM, but reliability risks arise from solder joint integrity due to tin whisker formation in pure tin finishes used in RoHS parts. If your original design used lead-based solder or operated in high-vibration or high-temperature environments (near the 125°C TJ limit), consider implementing conformal coating or selecting an alternative with matte tin-lead finish to mitigate whisker-induced shorts over time.
What design constraints should I consider when using the LM3524DM in a negative-output boost configuration for a -15V rail, especially regarding duty cycle limits and external MOSFET selection?
When configuring the LM3524DM for negative-output boost operation, the maximum 49% duty cycle limits input voltage range—ensure Vin remains above approximately 7.7V to maintain regulation at -15V output. Select an N-channel MOSFET with low gate charge and voltage rating >60V to handle voltage spikes from inductive kickback. Also, verify that the current-sense resistor and error amplifier biasing are compatible with negative feedback polarity, as improper layout can cause instability or latch-up under transient loads.
How does the lack of synchronous rectification in the LM3524DM impact efficiency in a 24V-to-12V step-down application at 2A load, and what are the trade-offs versus using a modern controller like the LM5116?
The LM3524DM’s non-synchronous architecture requires an external diode for freewheeling, resulting in significant conduction losses—especially at 2A—leading to ~80–85% efficiency versus >92% with a synchronous design like the LM5116. This creates thermal challenges in enclosed systems and reduces battery life in portable applications. However, the LM3524DM offers simpler layout, lower BOM cost, and proven stability in noise-sensitive analog systems where switching noise from body-diode reverse recovery in sync rectifiers could interfere with sensitive circuitry.
Is it feasible to synchronize the switching frequency of multiple LM3524DM controllers in a multi-rail power system, and what risks arise from its lack of clock sync capability?
No, the LM3524DM lacks clock synchronization pins, making it unsuitable for direct phase-locking with other converters. Operating multiple units without sync can cause beat-frequency interference, leading to audible noise or ripple modulation in sensitive analog loads (e.g., RF or data acquisition systems). To mitigate this, either stagger startup timing using the enable pin, add LC filtering on shared inputs, or replace with a sync-capable controller like the LM5021-1 if tight EMI control is required.
Given that the LM3524DM is obsolete and RoHS non-compliant, what are the long-term supply chain and compliance risks for industrial equipment still in production, and which drop-in alternatives offer better lifecycle support?
Using the LM3524DM poses significant long-term risks: diminishing stock increases cost and lead times, and its non-RoHS status may violate environmental regulations in EU or medical markets. While the LM3524DM/NOPB is a short-term fix, consider migrating to modern, actively supported alternatives like the LM5117 (buck/boost controller) or TPS40303 (synchronous buck) for better efficiency, sync capability, and guaranteed supply. For drop-in replacement without redesign, verify footprint and control logic compatibility—but plan a board revision to future-proof your design against obsolescence.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LM3524DM CAD Models
Texas Instruments LM3524DM PCB symbols & footprints
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