16-Pin HTSSOP (PWP) Top View

LM43603PWPR

ActiveVoltage Regulators - DC DC Switching RegulatorsHTSSOP

IC REG BUCK ADJ 3A 16HTSSOP

LM43603PWPR is a synchronous step-down DC-DC converter with 3.5V to 36V input and 3A output, in a 16-pin HTSSOP package, featuring adjustable switching frequency from 200kHz to 2.2MHz, low quiescent current, and multiple protection features.Checked against the datasheet

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Technical parameters

Key specs

Input voltage3.5 ~ 36 V

Output voltage1 ~ 28 V

Output current3 AMax

Switching frequency200 kHz ~ 2.2 MHz

Datasheet-verified parameters

23 items

Parameter	Value and test conditions	Source
Input Voltage Range	3.5 V to 36 V (Recommended Operating Conditions); 42 V (Absolute Maximum Rating)
Output Voltage	1.0 V to 28 V (Recommended Operating Conditions)
Output Current	0 A to 3 A (Recommended Operating Conditions)
Switching Frequency	200 kHz to 2.2 MHz (Adjustable); 500 kHz (Default)
Package	HTSSOP (16) / PWP, 5.1 mm x 6.6 mm
Operating Temperature	-40 °C to +125 °C (Junction Temperature)
Grade	Industrial (Implied by -40 to 125C range, not explicitly stated as AEC-Q100)
RoHS	Green (RoHS & no Sb/Br)
Halogen Free	Yes (Green (RoHS & no Sb/Br) implies no Sb/Br flame retardants)
Quiescent Current	7 µA (In Regulation); 1.2 µA (Shutdown, VIN=12V)
Absolute Maximum Input Voltage	42 V (VIN to PGND)
Recommended Operating Input Voltage	3.5 V to 36 V (VIN to PGND)
Internal Reference Voltage	1.011 V (Typical)
VCC Nominal Voltage	3.28 V
UVLO Threshold	3.1 V (Typical, VCC)
Soft-Start Time	4.1 ms (Internal, Typical)
Storage Temperature	-65 °C to +150 °C
ESD Protection (HBM)	1.0 kV
ESD Protection (CDM)	0.5 kV
Protection Features	Thermal Shutdown, UVLO, Cycle-by-cycle Current Limit, Output Short Circuit Protection (Hiccup Mode)
EMI Standard	Meets EN55022/CISPR 22 EMI standards
Pin Count	16
Package Body Size	5.1 mm x 6.6 mm x 1.2 mm

All parameters (21)ExpandCollapse

Power
Current - Output	3A
Voltage - Input (Max)	36V
Voltage - Input (Min)	3.5V
Voltage - Output (Max)	28V
Voltage - Output (Min/Fixed)	1V
AC and DC characteristics
Frequency - Switching	200kHz ~ 2.2MHz
Environment and package
Mounting Type	Surface Mount
Operating Temperature	-40°C~125°C(TJ)
Package	Tape & Reel (TR); Cut Tape (CT); Digi-Reel®
Package / Case	16-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package	16-HTSSOP
Other
Base Product Number	LM43603
Function	Step-Down
Mfr	Texas Instruments
Number of Outputs	1
Output Configuration	Positive
Output Type	Adjustable
Product Status	Active
Series	SIMPLE SWITCHER®
Synchronous Rectifier	Yes
Topology	Buck

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DatasheetDatasheet · 1.5 MB · 2026-10-29

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