LM26003MHX from Texas Instruments, in a HTSSOP-20-EP. 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	VIN	power_in	Power supply input for the high side FET.
2	VIN	power_in	Power supply input for the high side FET.
3	VIN	power_in	Power supply input for the high side FET.
4	AVIN	power_in	Power supply input for the IC supply.
5	PGOOD	output	Open-drain power good output that goes high when the output voltage is greater than 92% of nominal.
6	EN	input	Analog level enable input; when pulled below 0.8 V the device enters shutdown mode.
7	SS	input	Soft-start pin; connect a capacitor from this pin to GND to set the soft-start time.
8	COMP	input	Compensation pin; connect a resistor capacitor pair to compensate the control loop.
9	FB	input	Feedback pin; connect a resistor divider between VOUT and GND to set the output voltage.
10	AGND	power_in	Analog GND serves as the IC reference.
11	PGND	power_in	Power GND is the GND for the switching stage of the regulator.
12	FREQ	output	Frequency adjust pin; connect a resistor from this pin to GND to set the operating frequency.
13	FPWM	input	Logic level input; for normal operation connect to GND, and when pulled high sleep mode operation is disabled.
14	SYNC	input	Frequency synchronization pin; connect to an external clock for synchronized operation and pull low for non-synchronized operation.
15	VBIAS	input	Connect to an external 3-V or greater supply to bypass the internal regulator; tie to GND if not used.
16	VDD	power_in	Output of the internal regulator; bypass with a minimum 1.0-µF capacitor.
17	BOOT	input	Bootstrap capacitor pin; connect a 0.1-µF minimum ceramic capacitor from this pin to SW.
18	SW	output	Switch pin; the source of the internal N-channel switch.
19	SW	output	Switch pin; the source of the internal N-channel switch.
20	SW	output	Switch pin; the source of the internal N-channel switch.
21	EP	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	HTSSOP-20-EP
Category	Power Management (PMIC)
Pins	21

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
VIN voltage absolute maximum	VIN	-0.3		40	V		4
SW voltage absolute maximum	SW	-1		40	V		4
VDD voltage absolute maximum	VDD	-0.3		7	V		4
VBIAS voltage absolute maximum	VBIAS	-0.3		10	V		4
FB voltage absolute maximum	FB	-0.3		7	V		4
PGOOD voltage absolute maximum	PGOOD	-0.3		7	V		4
FREQ voltage absolute maximum	FREQ	-0.3		7	V		4
SYNC voltage absolute maximum	SYNC	-0.3		7	V		4
EN voltage absolute maximum	EN	-0.3		40	V		4
FPWM voltage absolute maximum	FPWM	-0.3		7	V		4
Power dissipation absolute maximum				3.1	W		4
Storage temperature	Tstg	-65		150	°C		4
Vapor phase lead temperature				215	°C	Vapor Phase (70s)	4
Infrared lead temperature				220	°C	Infrared (15s)	4
Operating junction temperature	TJ	-40		125	°C		4
Supply voltage	VIN	3		38	V		4
Shutdown current	ISD			10.8	µA	EN = 0 V	5
Shutdown current over temperature	ISD			20	µA	EN = 0 V, -40°C ≤ TJ ≤ 125°C	5
Quiescent current sleep mode, VBIAS=5V	IqSleep_VB			40	µA	Sleep mode, VBIAS = 5 V	5
Quiescent current sleep mode, VBIAS=5V over temperature	IqSleep_VB			70	µA	Sleep mode, VBIAS = 5 V, -40°C ≤ TJ ≤ 125°C	5
Quiescent current sleep mode, VBIAS=GND	IqSleep_VDD			76	µA	Sleep mode, VBIAS = GND	5
Quiescent current sleep mode, VBIAS=GND over temperature	IqSleep_VDD			125	µA	Sleep mode, VBIAS = GND, -40°C ≤ TJ ≤ 125°C	5
Quiescent current PWM mode, VBIAS=5V	IqPWM_VB		0.16	0.23	mA	PWM mode, VBIAS = 5 V, FPWM = 2 V	5
Quiescent current PWM mode, VBIAS=GND	IqPWM_VDD		0.65	0.85	mA	PWM mode, VBIAS = GND, FPWM = 2 V	5
Bias current sleep mode	IBIAS_Sleep			33	µA	Sleep mode, VBIAS = 5 V	5
Bias current sleep mode over temperature	IBIAS_Sleep			60	µA	Sleep mode, VBIAS = 5 V, -40°C ≤ TJ ≤ 125°C	5
Bias current PWM mode	IBIAS_PWM		0.5	0.7	mA	PWM mode, VBIAS = 5 V	5
Feedback voltage over temperature	VFB	1.217		1.255	V	5 V < Vin < 38 V, -40°C ≤ TJ ≤ 125°C	5
FB bias current	IFB	-200		200	nA	VFB = 1.20 V	5
VDD pin output voltage at 5 mA	VDD	5.99			V	7 V < Vin < 35 V, IVDD = 0 mA to 5 mA	5
VDD pin output voltage over temperature	VDD	5.5		6.5	V	7 V < Vin < 35 V, IVDD = 0 mA to 5 mA, -40°C ≤ TJ ≤ 125°C	5
Soft-start source current over temperature	ISS_Source	1.5		4.6	µA	-40°C ≤ TJ ≤ 125°C	5
VBIAS on voltage	Vbias_th	2.64	2.9	3.07	V	Specified at IBIAS = 92.5% of full value	5
Peak current limit over temperature	ILIMPK	3.15		6.05	A	-40°C ≤ TJ ≤ 125°C	6
PGOOD threshold over temperature	VTH_PGOOD	89		95	%	Measured at FB, PGOOD rising, -40°C ≤ TJ ≤ 125°C	6
PGOOD hysteresis		2	6	8	%		6
UVLO threshold falling over temperature	VUVLO	2.7		3.3	V	Vin falling, shutdown, VDD = 2.70 V, -40°C ≤ TJ ≤ 125°C	6
UVLO threshold rising over temperature	VUVLO	3.7		4.3	V	Vin rising, soft-start, VDD = VIN, -40°C ≤ TJ ≤ 125°C	6
Enable threshold voltage over temperature	VthEN	0.8		1.4	V	Enable rising, -40°C ≤ TJ ≤ 125°C	6
FPWM threshold over temperature	VTH_FPWM	0.8		1.6	V	-40°C ≤ TJ ≤ 125°C	6
Error amp transconductance over temperature	gm	400		1000	µmho	-40°C ≤ TJ ≤ 125°C	6
COMP pin voltage range	VCOMP	0.64		1.27	V		6
Switch on resistance over temperature	RDS(ON)	0.04		0.2	Ω	Isw = 2A, -40°C ≤ TJ ≤ 125°C	7
Switch off state leakage over temperature	Isw_off			5	µA	Vin = 38 V, VSW = 0 V, -40°C ≤ TJ ≤ 125°C	7
Switching frequency tolerance	fsw	-10		10	%	RFREQ = 62k, 124k, 240k, -40°C ≤ TJ ≤ 125°C	7
Switching frequency range	fSW	150		500	kHz	-40°C ≤ TJ ≤ 125°C	7
Upper frequency synchronization range	FSYNC_UP			30	%	As compared to nominal fSW, -40°C ≤ TJ ≤ 125°C	7
Lower frequency synchronization range	FSYNC_DN	-20			%	As compared to nominal fSW, -40°C ≤ TJ ≤ 125°C	7
Sync pin threshold rising over temperature	VSYNC	1.6			V	SYNC rising, -40°C ≤ TJ ≤ 125°C	7
Sync pin threshold falling over temperature	VSYNC	0.8			V	SYNC falling, -40°C ≤ TJ ≤ 125°C	7
Break-before-make BOOT leakage over temperature	IBOOT			5	µA	BOOT = 6 V, SW = GND, -40°C ≤ TJ ≤ 125°C	7
Thermal shutdown threshold	TSD		160		°C		6
Thermal resistance junction-to-ambient	θJA		32		°C/W	Power dissipation = 1W, 0 lfpm air flow	6
Junction-to-ambient thermal resistance (PWP 20 pins)	RθJA		25.4		°C/W		5
Junction-to-case (top) thermal resistance (PWP 20 pins)	RθJC(top)		19.6		°C/W		5
Junction-to-board thermal resistance (PWP 20 pins)	RθJB		16.5		°C/W		5
Junction-to-case (bottom) thermal resistance (PWP 20 pins)	RθJC(bot)		0.8		°C/W		5
Quiescent current in shutdown	ISD		10.8		µA	EN = 0 V	5
Feedback voltage	VFB		1.236		V	5 V < Vin < 38 V	5
Output voltage line regulation	ΔVOUT/ΔVIN		0.00025		%/V	5 V < Vin < 38 V	5
Output voltage load regulation	ΔVOUT/ΔIOUT		0.08		%/A	0.8 V < VCOMP < 1.15 V	5
Soft-start source current	ISS_Source		2.5		µA		5
Peak current limit	ILIMPK		4.7		A		6
Short circuit frequency foldback threshold	VFB_SC		0.87		V	Measured at FB falling	6
Min frequency in foldback	F_min_sc		45		kHz	VFB < 0.3 V	6
PGOOD threshold	VTH_PGOOD		92		%	Measured at FB, PGOOD rising	6
PGOOD on resistance	RDS_PGOOD		150		Ω	PGOOD sink current = 500 µA	6
PGOOD leakage current	IPGOOD_HI		1.25		nA	PGOOD = 5 V	6
UVLO threshold falling	VUVLO		2.96		V	Vin falling, shutdown, VDD = 2.96 V	6
UVLO threshold rising	VUVLO		3.99		V	Vin rising, soft-start, VDD = VIN	6
Enable threshold voltage	VthEN		1.18		V	Enable rising	6
Enable hysteresis			180		mV		6
EN source current	IEN_Source		4.85		µA	EN = 0 V	6
FPWM threshold	VTH_FPWM		1.24		V		6
Error amp transconductance	gm		675		µmho		6
COMP source current	ICOMP		57		µA	VCOMP = 0.9 V	6
COMP sink current	ICOMP		57		µA	VCOMP = 0.9 V	6
Switch on resistance	RDS(ON)		0.095		Ω	Isw = 2A	7
Switch off state leakage current	Isw_off		0.002		µA	Vin = 38 V, VSW = 0 V	7
FREQ voltage	VFREQ		1		V		7
Sync pin threshold rising	VSYNC		1.23		V	SYNC rising	7
Sync pin threshold falling	VSYNC		1.1		V	SYNC falling	7
Sync pin hysteresis			135		mV		7
SYNC leakage current	ISYNC		2		nA		7
Minimum off-time	TOFFMIN		300		ns		7
Minimum on-time	TONMIN		190		ns		7
Sleep mode threshold hysteresis	THSLEEP_HYS		101.3		%	VFB rising, % of THWAKE	7
Wake up threshold	THWAKE		1.236		V	Measured at falling FB, COMP = 0.6	7
BOOT pin leakage current	IBOOT		0.001		µA	BOOT = 6 V, SW = GND	7

CAD (KiCad official)

Symbol: LM26003MHX
Footprint: Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm
3D model: HTSSOP-20-EP (KiCad packages3D, STEP)
3D model files: lm26003mhx-etched.step / lm26003mhx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm26003mhx.step / lm26003mhx.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (35 pp, sha256 e141f2bc565d916a, 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).

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LM26003MHX

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