component

NDP23B0QB-A

Public Made by Adom

by adom

NDP DC-DC Converters, QFN-20(5x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Contents

README

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NDP23B0QB-A

NDP · DC-DC Converters · QFN-20(5x5)

NDP23B0QB-A from NDP, in a QFN-20(5x5). 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 Ground return. Tie to system GND plane along with PAD1.
2 GND power_in Ground return. Tie to system GND plane along with PAD1.
3 GND power_in Ground return. Tie to system GND plane along with PAD1.
PAD1 GND power_in Exposed thermal ground pad. Solder to a large GND copper pour for heat dissipation and low-impedance return.
4 NC unconnected No internal connection. Per layout note may be tied to VIN or GND for easier PCB routing.
5 NC unconnected No internal connection. Per layout note may be tied to VIN or GND for easier PCB routing.
6 VIN power_in Power input, 7.5-30 V (recommended 8-24 V). Decouple with a low-ESR bulk capacitor plus at least two 10 µF (1206) ceramic caps close to the IC.
7 VIN power_in Power input, 7.5-30 V (recommended 8-24 V). Decouple with a low-ESR bulk capacitor plus at least two 10 µF (1206) ceramic caps close to the IC.
8 VIN power_in Power input, 7.5-30 V (recommended 8-24 V). Decouple with a low-ESR bulk capacitor plus at least two 10 µF (1206) ceramic caps close to the IC.
PAD2 VIN power_in Exposed VIN pad. Solder to the input-power copper plane to carry input current and improve thermal dissipation.
9 NC unconnected No internal connection.
10 BST passive Bootstrap capacitor node for the high-side gate driver. Connect a 100 nF ceramic capacitor between BST and SW to generate the floating gate-drive supply for the high-side N-MOSFET.
11 NC unconnected No internal connection.
12 SW power_out Switching node connecting the internal high-side and low-side power MOSFETs to the external inductor. Route as a short, wide trace to minimize EMI.
13 SW power_out Switching node connecting the internal high-side and low-side power MOSFETs to the external inductor.
14 SW power_out Switching node connecting the internal high-side and low-side power MOSFETs to the external inductor.
PAD3 SW power_out Exposed SW pad. Solder to the inductor-side copper pour to handle switch-node current and aid heat dissipation.
15 NC unconnected No internal connection.
16 FB input Feedback input for output voltage regulation. Connect to a resistor divider from VOUT so that FB = VREF (1.0 V typ, ±2%). VOUT = 1.0 V × (RFB_TOP + RFB_LOW) / RFB_LOW.
17 CSP input Positive input of the output current-sense amplifier. Connect to the load-side terminal of an external current-sense resistor in series with the inductor/output.
18 CSN input Negative input of the output current-sense amplifier. Connect to the output-capacitor side of the external current-sense resistor.
19 EN input Enable input with internal pull-up. Drive high (>1 V) or leave floating to enable the converter; pull below 0.3 V to shut down.
20 FS input Switching-frequency programming pin. Connect an external resistor to GND to set FSW: floating = 130 kHz, 250 kΩ = 180 kHz, 100 kΩ = 250 kHz, 60 kΩ = 300 kHz (up to ~330 kHz).

Key specifications

Parameter Value
Manufacturer NDP
Package QFN-20(5x5)
Category PMIC
Pins 23

Ordering variants

Same part, different packaging or reel option.

  • NDP23B0QB-A

CAD (KiCad official)

  • Symbol: NDP23B0QB-A
  • Footprint: Package_DFN_QFN:QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm
  • 3D model: QFN-20(5x5) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ndp23b0qb-a.step 230 KB You want the bare part, or you mark your own boards.
ndp23b0qb-a-etched.step 2.3 MB You want the part with NDP23B0QB-A already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 579 faces against 134 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: NDP datasheet (14 pp, sha256 d10929ce6c7f647d, retrieved 2026-08-17, tier: lcsc)
  • 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).

Datasheet PDF