LM3489MM
The LM3489 is a hysteretic PFET buck controller driving an external P-channel MOSFET to deliver up to 4 A from a 4.5 V to 35 V input. Its hysteretic control provides 100% maximum duty cycle, a typical quiescent current of 0.28 uA and an enable pin for on/off control. Operating from -40 degC to 125 degC, it suits automotive, industrial and general-purpose step-down supplies.
- Package
- VSSOP-8
Product overview
The LM3489 is a hysteretic PFET buck controller driving an external P-channel MOSFET to deliver up to 4 A from a 4.5 V to 35 V input. Its hysteretic control provides 100% maximum duty cycle, a typical quiescent current of 0.28 uA and an enable pin for on/off control. Operating from -40 degC to 125 degC, it suits automotive, industrial and general-purpose step-down supplies.
- Manufacturer
- TI
- Part number
- LM3489MM
- Category
- Power Management
- Package
- VSSOP-8
- Packaging
- Tape & Reel
- Condition
- New & Original
- Compliance
- RoHS & REACH Compliant
- Lifecycle
- Confirm with manufacturer
- Lead time / MOQ
- Confirm with quotation
Technical parameters
24 parametersConstruction
- ISHDN EN = 0
- 7 µA
- VEN_HYST Enable threshold hysteresis
- 130 mV
- IQ FB = 1.5 V (not switching)
- 280 µA
- VHYST Comparator hysteresis
- 10 mV
- VCL_OFFSET VFB = 1
- 0 mV
- ICL_ADJ VFB = 1.5
- 5.5 µA
- TCL VADJ = 11.5 V, VISNS = 11 V, VFB = 1
- 9 µs
- Source, ISOURCE = 100 mA
- 5.5
- Sink, ISINK = 100 mA
- 8.5
- Source, VIN = 7 V, PGATE = 3.5
- 0.44
- Sink, VIN = 7 V, PGATE = 3.5
- 0.1
- TONMIN_NOR VISNS = VADJ + 0.1 V, Cload on OUT = 1000 pF
- 100 ns
- TONMIN_CL
- 200 ns
- %VFB/ΔVIN 4.5 V ≤ VIN ≤ 35
- 0 V
Performance
- VIN voltage
- 36 V
- PGATE voltage
- 36 V
- FB voltage
- 5 V
- ISENSE voltage –1 (<1
- 00 V
- ADJ voltage
- 36 V
- VIN Supply voltage
- 35 V
- EN voltage
- 5.5 V
- VEN Enable threshold voltage Enable rising 1
- 1.5 V
- VFB Feedback voltage (1) 1
- 1.264 V
- IFB FB pin bias current (2) VFB = 1
- 300 nA
Specifications & documentation
Use the official manufacturer documentation to verify electrical characteristics, package dimensions and operating limits before design approval.
Frequently asked questions
Common pre-quotation questions and selection notes to help you verify key parameters and sourcing before requesting a quote.
How do I verify the part is genuine / avoid counterfeit?
Buy only from authorized or franchised channels. On receipt, check: (1) laser-etched markings that solvent will not remove; (2) batch / lot code consistent between label and device; (3) original reel or tube packaging; (4) request traceability documents (CoC, date code). For critical parts, third-party X-ray / decapsulation testing is recommended.
How do I read the markings / date code on a chip?
Most active ICs use a 4-digit date code YYWW (year + week, e.g. 2345 = 2023 week 45). The top mark is manufacturer logo + base part number + lot code. For SMD code lookup, search by "marking code + package" on AllDataSheet / Octopart / LCSC.
What does the package code mean (TO-220, SOT-23, QFP…)?
Package codes describe the physical form factor and pin layout — critical when sourcing, because electrically equivalent parts in different packages will not fit the PCB. Common: TO-220 (3-terminal power), SOT-23 (3-pin small signal), DIP / SOIC (through-hole / SMD ICs), QFP / QFN (MCUs, processors).
What if my original model is discontinued (EOL / NRND)?
Three options: (1) the manufacturer’s recommended replacement; (2) franchised distributor legacy stock; (3) a functionally compatible cross-brand part — provided pinout and key parameters match. Always evaluate on a real board before mass swap.
What is the minimum order quantity (MOQ) and lead time?
We support both sample and volume orders. Minimum order quantity, stock availability and lead time are confirmed per inquiry — tell us your model and quantity and we will quote. Sample quantities for design validation are supported.
Can I get the datasheet and samples?
The full datasheet is linked on this page. For parts without a direct datasheet, we can locate the manufacturer document on request. Sample requests are supported — contact us with your model and quantity.
Request confirmation of current stock, date code, packaging, price and delivery terms. Product information does not constitute a binding offer; final specifications are confirmed with your quotation.