S5 Package 5-Lead Plastic TSOT…

LTC3406B-2ES5

Voltage Regulators - DC DC Switching Regulators5-Lead Plastic TSOT-23

IC REG BUCK SYNC 600MA 2.25MHZ TSOT-23

LTC3406B-2ES5 is a 2.25MHz synchronous step-down regulator with 2.5V to 5.5V input voltage, 600mA max output current, in a 5-lead TSOT-23 package, featuring low quiescent current and 100% duty cycle low dropout operation.Checked against the datasheet

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Technical parameters

Key specs

Input voltage2.5 ~ 5.5 V

Output current600 mAMax

Switching frequency1.8 ~ 2.7 MHzMax: 2.7MHz (VFB=0.6V or VOUT=100%)

Datasheet-verified parameters

21 items

Parameter	Value and test conditions	Source
Input Voltage Range	Min: 2.5V, Max: 5.5V
Output Current	600mA
Oscillator Frequency	Min: 1.8MHz, Typ: 2.25MHz, Max: 2.7MHz (VFB=0.6V or VOUT=100%)
Package	5-Lead Plastic TSOT-23
Operating Temperature	0°C to 70°C (Guaranteed), -40°C to 85°C (Assured by design)
Quiescent Current	Typ: 350μA, Max: 500μA (VFB=0.5V or VOUT=90%)
Shutdown Supply Current	Typ: 0.1μA, Max: 1μA (VRUN=0V, VIN=4.2V)
Regulated Feedback Voltage	Typ: 0.6V (TA=25°C), Min: 0.588V, Max: 0.612V
RDS(ON) of P-Channel FET	Max: 0.5Ω (ISW=100mA)
RDS(ON) of N-Channel FET	Max: 0.45Ω (ISW=-100mA)
Peak Inductor Current	Typ: 1A, Max: 1.25A (VIN=3V, VFB=0.5V or VOUT=90%, Duty Cycle < 35%)
RUN Threshold	Min: 0.3V, Typ: 1V, Max: 1.5V
SW Leakage	Max: ±1μA (VRUN=0V, VSW=0V or 5V, VIN=5V)
Feedback Current	Max: ±30nA
Reference Voltage Line Regulation	Typ: 0.04%/V, Max: 0.4%/V (VIN=2.5V to 5.5V)
ΔOutput Overvoltage Lockout	Min: 20mV, Typ: 50mV, Max: 80mV
Output Voltage Load Regulation	Max: 0.5%
Maximum Junction Temperature	125°C
Thermal Resistance Junction to Ambient	250°C/W
Thermal Resistance Junction to Case	90°C/W
Overtemperature Protection	Included, turns off switches at approx 150°C

All parameters (7)ExpandCollapse

Power
Feedback Voltage	0.6 V (Typ)
Input Voltage Range	2.5 V to 5.5 V
Output Current	600mA
Quiescent Current	350 µA
AC and DC characteristics
Switching Frequency	2.25MHz
Environment and package
Operating Temperature Range	-40°C to 85°C
Package	5-LEAD PLASTIC TSOT-23

Pinout and package

Package5-Lead Plastic TSOT-23

Pin	Name	Function
1	GND	(Ground)
2	VFB	(Feedback)
3	RUN	(Run Control)
4	VIN	(Input Voltage)
5	SW	(Switch Node)

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DatasheetDatasheet · 217.4 KB · 2026-11-04

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