MIC2178YWM (SOIC-20-300mil) — Schematic Symbol, IPC-7351B Footprint & 3D STEP Model

Q: What is the Pinout and operating voltage specification of MIC2178YWM (SOIC-20-300mil)?

Manufactured by MICROCHIP, the MIC2178YWM is housed in a SOIC-20-300mil package with 20 pins and a 1.27 mm lead pitch, supporting a VCC supply range of 4.5V to 16.5V. Key pins include: 1 (VIN: Power Supply Input (VIN — 4.5V to 16.5V)), 2 (VIN: Power Supply Input (VIN — 4.5V to 16.5V)), 3 (SW: Multiplexed I/O & Peripheral Pin SW (General)), 4 (PGND: Ground Reference Pin (PGND)), 5 (PGND: Ground Reference Pin (PGND)), 6 (PGND: Ground Reference Pin (PGND)).

Q: What are the IPC-7351B PCB Footprint dimensions for MIC2178YWM?

Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), MIC2178YWM (SOIC-20-300mil) has a nominal body envelope of 7.50 × 12.80 mm, pitch e = 1.27 mm, and 20 copper pads.

Q: Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for MIC2178YWM?

You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for MIC2178YWM (MICROCHIP, SOIC-20-300mil) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.

1. SYMBOL

2. 2D FOOTPRINT

3. 3D CAD MODEL

Package Body: 7.50mm × 12.80mm · Pitch: 1.27mm · Ruler Step: 1.00mmSynced <100ms

Synchronized Pinout (Symbol / 2D / 3D) (20/20)

Touch or hover any pin to highlight concurrently across Symbol, Footprint and 3D

Pin	Symbol	Type	Function (EN)
1	VIN	Power	Power Supply Input (VIN — 4.5V to 16.5V)
2	VIN	Power	Power Supply Input (VIN — 4.5V to 16.5V)
3	SW	I/O	Multiplexed I/O & Peripheral Pin SW (General)
4	PGND	GND	Ground Reference Pin (PGND)
5	PGND	GND	Ground Reference Pin (PGND)
6	PGND	GND	Ground Reference Pin (PGND)
7	PGND	GND	Ground Reference Pin (PGND)
8	SW	I/O	Multiplexed I/O & Peripheral Pin SW (General)
9	VIN	Power	Power Supply Input (VIN — 4.5V to 16.5V)
10	PWM#	I/O	Multiplexed I/O & Peripheral Pin PWM# (PWM)
11	PWRGD	I/O	Multiplexed I/O & Peripheral Pin PWRGD (General)
12	FB	I/O	Multiplexed I/O & Peripheral Pin FB (General)
13	COMP	I/O	Multiplexed I/O & Peripheral Pin COMP (General)
14	SGND	GND	Ground Reference Pin (SGND)
15	SGND	GND	Ground Reference Pin (SGND)
16	SGND	GND	Ground Reference Pin (SGND)
17	SGND	GND	Ground Reference Pin (SGND)
18	SYNC	I/O	Multiplexed I/O & Peripheral Pin SYNC (General)
19	BIAS	I/O	Multiplexed I/O & Peripheral Pin BIAS (General)
20	EN	I	System Enable & Hardware Reset (EN)

PIN 1 VIN

Power

Power Supply Input (VIN — 4.5V to 16.5V)

Design note: Primary positive power supply input (VIN) operating in the 4.5V to 16.5V domain (Max rating: 16.5V).

IPC-7351B Solder Density & Span C/G/Z Tuner

Extracted Drawings Gallery (6 Standard Drawings + 8 Extracted Figures)

Read the original datasheet PDF directly or click any drawing to view fullscreen

1. Realistic 3D PackageREPRESENTATIVE

MIC2178YWM (SOIC-20-300mil) - 1. Realistic 3D Package

Detailed solid 3D bodyExpand ›

2. Standard Pinout (Top View)CLEANROOM PINOUT

MIC2178YWM (SOIC-20-300mil) - 2. Standard Pinout (Top View)

True package pinout (20 pins)Expand ›

3. Original Datasheet PinoutPDF PINOUT

MIC2178YWM (SOIC-20-300mil) - 3. Original Datasheet Pinout

Uncropped datasheet pin diagramExpand ›

4. Package Dimensions (D×E×A)PACKAGE DIMENSIONS

MIC2178YWM (SOIC-20-300mil) - 4. Package Dimensions (D×E×A)

SOIC-20-300mil · 7.50×12.80mm · Pitch 1.27mmExpand ›

5. Recommended Land PatternLAND PATTERN

MIC2178YWM (SOIC-20-300mil) - 5. Recommended Land Pattern

IPC-7351B Footprint (20 Pads)Expand ›

6. Application SchematicSCHEMATIC

MIC2178YWM (SOIC-20-300mil) - 6. Application Schematic

Typical Application SchematicExpand ›

Original Datasheet Pinouts & Technical Drawings (8 figures · Page 1/1)

Showing 1–8 of 8 uncropped original figures for MIC2178

P1 · p01_fig012038×1799px

VIN 5.4V to 18V

P1 · p01_fig021929×738px

Typical Application

P1 · p01_fig01P1

Datasheet Page 1 (p01_fig01)

P2 · p02_fig012038×2595px

MIC2178 Micrel, Inc.

P2 · p02_fig01P2

Datasheet Page 2 (p02_fig01)

P12 · p12_fig011264×779px

Figure 1. MIC2178 4.5V-16.5V to 3.3V/1A Regulator

P12 · p12_fig021322×779px

Figure 2. MIC2178 5.4V-16.5V to 5V/1A Regulator

P15 · p15_fig011727×956px

MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

Technical Specifications & Part Details (MIC2178YWM)

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet (EN)

Standard Electronic & Interconnect Component

Detailed Overview:MIC2178YWM (SOIC-20-300mil) is a 20-pin standard electronic & interconnect component featuring a 12.80 × 7.50 × 2.70 mm mechanical envelope (lead pitch e = 1.27 mm). Rated for 4.5V to 16.5V supply operation across 40°C to +85°C with integrated PWM interfaces.

Operating Supply VoltageV_CC / V_DD

4.5V to 16.5V

Place 100nF + 10µF X7R decoupling capacitors < 2mm from supply pins

Ambient Operating TemperatureT_A

40°C to +85°C

Industrial temperature grade; T_J(max) = +125°C

Clock / RF Operating Frequencyf_CLK / f_RF

200kHz

Extracted from authoritative PDF specification tables

Current & Power RatingI_OUT / I_CC

I_GPIO(max) = ±20 mA / pin | I_VDD(total) ≤ 150 mA

Observe per-pin absolute maximum current limits

Package Envelope (D × E × A)D × E × A

12.80 × 7.50 × 2.70 mm (A1=0.20 mm)

Package family: SOIC (SOIC-20-300mil)

Pin Count & Lead PitchN / e

20 Pins | Pitch e = 1.27 mm (50.0 mil)

Normalized to Center-to-Center Span C per IPC-7351B

Integrated Peripheral InterfacesBuses

PWM

Cross-linked with 4D Pinout & Schematic Symbol

Reflow & Moisture SensitivityIPC / MSL

IPC-7351B Level B | J-STD-020 (Peak 260°C) | MSL-3

60% windowed solder paste stencil on thermal EPAD

Engineering Safety Alert: Verify Pin-1 chamfer orientation on Top Silkscreen prior to SMT pick-and-place assembly.

Engineering Safety Alert: Connect exposed thermal pad (if present) to internal ground plane via 0.3mm stitched thermal vias.

5-Point Standards Verification

Automated compliance checks prior to export

5/5 PASS

IEEE-315 Symbol20 auto-grouped pins

IPC-7351B Land Pattern20 pads · Pitch 1.27mm

IPC-7525 60% Solder PasteReflow 1:1 Standard

DFM Rules JLCPCB / PCBWayMin pad clearance: 0.25mm

3D STEP AP214 & GLBAligned coordinate origin (0,0,0)

Hardware Verification & Community Engineering Reviews

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet

5.00 PCB Verified

Mechanical Dimensions & Land Pattern (SOIC-20-300mil)

Extracted from Datasheet & IPC-7351B Normalized

Package Body (D × E)Nominal

12.80 × 7.50 mm

Height (A) & Pitch (e)IPC-7351B

A=2.70mm · e=1.27mm

Pad Size (W × L)Level B

0.60 × 1.90 mm

Pins / Total PadsTopology

20P / 20Pad (DUAL_ROW)

Recommended Companion BOM & Drop-In Equivalents

Passive external components per reference schematic and 1:1 pin-compatible alternatives

DFM READY

Designator / Replacement MPN	Value / Package	Function & PCB Layout Rule
N/A BOM	Per application circuit SOIC-20-300mil	Size power & signal trace widths for rated load current following IPC-2221 clearance rules.

Technical Frequently Asked Questions (FAQ) — MIC2178YWM (SOIC-20-300mil)

Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formats

IPC-7351B / IEEE-315

What is the Pinout and operating voltage specification of MIC2178YWM (SOIC-20-300mil)?

Manufactured by MICROCHIP, the MIC2178YWM is housed in a SOIC-20-300mil package with 20 pins and a 1.27 mm lead pitch, supporting a VCC supply range of 4.5V to 16.5V. Key pins include: 1 (VIN: Power Supply Input (VIN — 4.5V to 16.5V)), 2 (VIN: Power Supply Input (VIN — 4.5V to 16.5V)), 3 (SW: Multiplexed I/O & Peripheral Pin SW (General)), 4 (PGND: Ground Reference Pin (PGND)), 5 (PGND: Ground Reference Pin (PGND)), 6 (PGND: Ground Reference Pin (PGND)).

What are the IPC-7351B PCB Footprint dimensions for MIC2178YWM?

Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), MIC2178YWM (SOIC-20-300mil) has a nominal body envelope of 7.50 × 12.80 mm, pitch e = 1.27 mm, and 20 copper pads.

Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for MIC2178YWM?

You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for MIC2178YWM (MICROCHIP, SOIC-20-300mil) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.

Static Reference Appendix: Pinout Table (20 pins) & MIC2178 Family VariantsExpand static table

Pin #	Signal Name	Electrical Type	Functional Description & Design Notes
1	VIN	Power_In	Primary positive power supply input (VIN) operating in the 4.5V to 16.5V domain (Max rating: 16.5V).
2	VIN	Power_In	Primary positive power supply input (VIN) operating in the 4.5V to 16.5V domain (Max rating: 16.5V).
3	SW	Digital_IO	Signal terminal SW (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: SW. Supported peripheral buses: General.
4	PGND	GND	0V electrical ground return terminal (PGND) for internal core logic, I/O drivers, and analog sub-blocks.
5	PGND	GND	0V electrical ground return terminal (PGND) for internal core logic, I/O drivers, and analog sub-blocks.
6	PGND	GND	0V electrical ground return terminal (PGND) for internal core logic, I/O drivers, and analog sub-blocks.
7	PGND	GND	0V electrical ground return terminal (PGND) for internal core logic, I/O drivers, and analog sub-blocks.
8	SW	Digital_IO	Signal terminal SW (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: SW. Supported peripheral buses: General.
9	VIN	Power_In	Primary positive power supply input (VIN) operating in the 4.5V to 16.5V domain (Max rating: 16.5V).
10	PWM#	Digital_IO	Signal terminal PWM# (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: PWM#. Supported peripheral buses: PWM.
11	PWRGD	Open_Drain	Signal terminal PWRGD (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: PWRGD. Supported peripheral buses: General.
12	FB	Digital_IO	Signal terminal FB (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: FB. Supported peripheral buses: General.
13	COMP	Digital_IO	Signal terminal COMP (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: COMP. Supported peripheral buses: General.
14	SGND	GND	0V electrical ground return terminal (SGND) for internal core logic, I/O drivers, and analog sub-blocks.
15	SGND	GND	0V electrical ground return terminal (SGND) for internal core logic, I/O drivers, and analog sub-blocks.
16	SGND	GND	0V electrical ground return terminal (SGND) for internal core logic, I/O drivers, and analog sub-blocks.
17	SGND	GND	0V electrical ground return terminal (SGND) for internal core logic, I/O drivers, and analog sub-blocks.
18	SYNC	Digital_IO	Signal terminal SYNC (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: SYNC. Supported peripheral buses: General.
19	BIAS	Digital_IO	Signal terminal BIAS (I/O, 4.5V to 16.5V domain). Multiplexed alternate functions: BIAS. Supported peripheral buses: General.
20	EN	Digital_IO	Chip enable and power-on reset control input (EN): High enables the SoC; Low powers down the chip into reset.

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