component
lp2998max
Public Unreviewedby Ray
Texas Instruments Battery Management, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownLP2998MAX
Texas Instruments · Battery Management · SOIC-8
LP2998MAX from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Device ground return. Also connect the exposed pad (DDA package) to this net; SOIC-8 (MAX) has no exposed pad. |
| 2 | SD | input | Active-low shutdown. When pulled low the VTT output tri-states (Suspend-To-RAM); VREF remains active. Has an internal pull-up current so it can be left open or tied to AVIN to enable. Input range 0 to AVIN. |
| 3 | VSENSE | input | Remote-sense feedback pin for VTT regulation. Connect to VTT at the point of load (middle of the termination bus) for best distributed load regulation; tie directly to VTT at the pin if remote sense is not used. A small 0.1 µF ceramic near the pin helps reject noise pickup. |
| 4 | VREF | output | Buffered VDDQ/2 reference output for chipset/DIMM Vref inputs. Nominally 1.258 V (DDR-I, VDDQ=2.5 V), 0.910 V (DDR-II, 1.8 V) or 0.758 V (DDR-III, 1.5 V). Output impedance ~2.5 kΩ over ±30 µA; remains active during shutdown / thermal shutdown. Bypass with 0.01-0.1 µF ceramic near the pin. |
| 5 | VDDQ | input | Sense input for generating the internal VDDQ/2 reference via two internal 50 kΩ resistors (100 kΩ to GND total, always drawing current even in shutdown). Best used as a remote sense tied to the DDR VDDQ rail at the DIMM. Absolute max 6 V, and must be ≤ 2×(AVIN−1) V. |
| 6 | AVIN | power_in | Analog supply for the internal control circuitry. Recommended operating range 2.2 V to 5.5 V (absolute max 6 V). AVIN must be ≥ PVIN. |
| 7 | PVIN | power_in | Power input to the VTT output stage. Range 0 V to AVIN; recommended ≤ 3.3 V to keep internal dissipation within the thermal limit. Higher PVIN increases maximum continuous output current by lowering RDSON headroom above VTT. |
| 8 | VTT | power_out | Regulated DDR termination output at VDDQ/2. Sources and sinks up to ±1.5 A continuous with peak transients to ±3 A; tri-stated during SD-asserted shutdown and thermal shutdown. Requires a bulk output capacitor sized for expected transient step; VTT must not be pulled above AVIN while in shutdown. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
LP2998MAXLP2998MAXMRLP2998MAXMRXLP2998MAXMRE
CAD (KiCad official)
- Symbol:
LP2998MAX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (None pp, sha256
0b00a4c77bb17804, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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