MIC5219-3.3YMM-TR from Microchip Tech, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	EN	input	Enable input is CMOS-compatible: logic-high (>2 V) enables the regulator, while logic-low or open puts it in shutdown.
2	IN	power_in	Supply input; a 1 µF capacitor from IN to GND is recommended if there is more than 10 inches of wire to the AC filter capacitor or if a battery is the input.
3	OUT	power_out	Regulator output; an output capacitor between OUT and GND is required to prevent oscillation (1 µF minimum without CBYP, 2.2 µF minimum with 470 pF CBYP, ESR about 1 Ω or less).
4	BYP	passive	Reference bypass for the fixed-voltage version: connect an external 470 pF capacitor to GND to reduce output noise, or leave open.
5	GND	power_in	Ground; MSOP-8 pins 5 through 8 are internally connected to each other.
6	GND	power_in	Ground; MSOP-8 pins 5 through 8 are internally connected to each other.
7	GND	power_in	Ground; MSOP-8 pins 5 through 8 are internally connected to each other.
8	GND	power_in	Ground; MSOP-8 pins 5 through 8 are internally connected to each other.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	MSOP-8
Category	Power Management ICs
Pins	8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply Input Voltage	VIN	2.5		12	V	Operating ratings	5
Supply Input Voltage	VIN	-20		20	V		5
Enable Input Voltage	VEN	0			V	Upper limit printed as VIN (not a number)	5
Output Voltage	VOUT	-1		1	%		5
Variation from Nominal	VOUT	-2		2	%		5
Line Regulation	ΔVOUT/VOUT		0.009	0.05	%/V	VIN = VOUT + 1V to 12V	5
Line Regulation (bold, -40°C to +125°C)	ΔVOUT/VOUT			0.1	%/V	VIN = VOUT + 1V to 12V; bold values -40°C ≤ TJ ≤ +125°C	5
Load Regulation	ΔVOUT/VOUT		0.05	0.5	%	IOUT = 100 µA to 500 mA	5
Load Regulation (bold, -40°C to +125°C)	ΔVOUT/VOUT			0.7	%	IOUT = 100 µA to 500 mA; Note 2; bold values -40°C ≤ TJ ≤ +125°C	5
Dropout Voltage	VIN, VOUT		10	60	mV	IOUT = 100 µA	6
Dropout Voltage (bold, -40°C to +125°C)	VIN, VOUT			80	mV	IOUT = 100 µA; bold values -40°C ≤ TJ ≤ +125°C	6
Dropout Voltage	VIN, VOUT		115	175	mV	IOUT = 50 mA	6
Dropout Voltage (bold, -40°C to +125°C)	VIN, VOUT			250	mV	IOUT = 50 mA; bold values -40°C ≤ TJ ≤ +125°C	6
Dropout Voltage	VIN, VOUT		175	300	mV	IOUT = 150 mA	6
Dropout Voltage (bold, -40°C to +125°C)	VIN, VOUT			400	mV	IOUT = 150 mA; bold values -40°C ≤ TJ ≤ +125°C	6
Dropout Voltage	VIN, VOUT		350	500	mV	IOUT = 500 mA	6
Dropout Voltage (bold, -40°C to +125°C)	VIN, VOUT			600	mV	IOUT = 500 mA; bold values -40°C ≤ TJ ≤ +125°C	6
Ground Pin Current	IGND		80	130	µA	VEN ≥ 3.0V, IOUT = 100 µA	6
Ground Pin Current (bold, -40°C to +125°C)	IGND			170	µA	VEN ≥ 3.0V, IOUT = 100 µA; bold values -40°C ≤ TJ ≤ +125°C	6
Ground Pin Current	IGND		350	650	µA	VEN ≥ 3.0V, IOUT = 50 mA	6
Ground Pin Current (bold, -40°C to +125°C)	IGND			900	µA	VEN ≥ 3.0V, IOUT = 50 mA; bold values -40°C ≤ TJ ≤ +125°C	6
Ground Pin Current	IGND		1.8	2.5	mA	VEN ≥ 3.0V, IOUT = 150 mA	6
Ground Pin Current (bold, -40°C to +125°C)	IGND			3	mA	VEN ≥ 3.0V, IOUT = 150 mA; bold values -40°C ≤ TJ ≤ +125°C	6
Ground Pin Current	IGND		12	20	mA	VEN ≥ 3.0V, IOUT = 500 mA	6
Ground Pin Current (bold, -40°C to +125°C)	IGND			25	mA	VEN ≥ 3.0V, IOUT = 500 mA; bold values -40°C ≤ TJ ≤ +125°C	6
Ground Pin Quiescent Current			0.05	3	µA	VEN ≤ 0.4V	6
Ground Pin Quiescent Current			0.1	8	µA	VEN ≤ 0.18V	6
Current Limit	ILIMIT		700	1000	mA	VOUT = 0V	6
Enable Input Logic-Low Voltage	VENL			0.4	V	VEN = logic low (regulator shutdown)	7
Enable Input Logic-Low Voltage (bold, -40°C to +125°C)	VENL			0.18	V	VEN = logic low (regulator shutdown); bold values -40°C ≤ TJ ≤ +125°C	7
Enable Input Logic-High Voltage		2			V	VEN = logic high (regulator enabled)	7
Enable Input Current (logic low)	IENL	-1	0.01		µA	VENL ≤ 0.4V	7
Enable Input Current (logic low, bold)	IENL	-2	0.01		µA	VENL ≤ 0.18V; bold values -40°C ≤ TJ ≤ +125°C	7
Enable Input Current (logic high)	IENH	2	5	20	µA	VENH ≥ 2.0V	7
Enable Input Current (logic high, bold)	IENH			25	µA	VENH ≥ 2.0V; bold values -40°C ≤ TJ ≤ +125°C	7
Lead Temperature				260	°C	Soldering, 5 sec.	8
Operating Ambient Temperature Range	TA	-40		125	°C		8
Maximum Junction Temperature Range	TJ	-40		125	°C		8
Storage Temperature Range	TS	-65		150	°C		8
Thermal Resistance, MSOP-8Ld	θJA		160		°C/W	Minimum footprint area	8
Output Voltage Temperature Coefficient	ΔVOUT/ΔT		40		ppm/°C	Note 1	5
Ripple Rejection	PSRR		75		dB	f = 120 Hz	6
Thermal Regulation	ΔVOUT/ΔPD		0.05		%/W	Note 6	6
Output Noise	eno		500		nV/√ Hz	IOUT = 50 mA, COUT = 2.2 µF, CBYP = 0	6
Output Noise	eno		300		nV/√ Hz	IOUT = 50 mA, COUT = 2.2 µF, CBYP = 470 pF	6

CAD (KiCad official)

Symbol: MIC5219-3.3YMM-TR
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)
3D model files: mic5219-3-3ymm-tr-etched.step / mic5219-3-3ymm-tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mic5219-3-3ymm-tr.step / mic5219-3-3ymm-tr.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (32 pp, sha256 75b54e281b470424, retrieved 2026-11-05, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

MIC5219-3.3YMM-TR

Verified MIC5219-3.3YMM-TR

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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