ML3406

Features:

 2.5V to 5.5V Input Voltage Range
 600mA Output Current
 1.5MHz Constant Frequency Operation
 Low Quiescent Current: Only 20A During Operation
 High Efficiency: Up to 96%
 Low Dropout Operation:100% Duty Cycle
 No Schottky Diode Required
 0.6 V Reference Allows Low Output Voltages
 Shutdown Mode Draws £ 1A Supply Current
 Current Mode Operation for Excellent Line and Load Transient Response
 Over temperature Protected
 Mini Package SOT-23-5L


Application

 Cellular Telephones
 Personal Information Appliances
 Wireless and DSL Modems
 Digital Still Cameras
 MP3 Players
 Portable Instruments


Pinout




Specifications

Parameter	Symbol	Maximum Ratings	Unit
Input Supply Voltage	Vin	-0.3V to 6V	V
Run, VFB Voltages	VFB, VRUN	-0.3V to VIN	V
SW Voltage	VSW	-0.3V to (VIN +0.3V)	V
P-Channel Switch Source Current (DC)	ISW-P	800mA	mA
N-Channel Switch Sink Current (DC)	ISW-N	800mA	mA
Peak SW Sink and Source Current	ISW-N	1.3A	A
Operating Temperature Range	Ta	0°C to 70°C	°C
Junction Temperature (Note 3)	Tj	125°C	°C
Storage Temperature Range	Tstg	-65°C to 150°C	°C
Lead Temperature (Soldering, 10 sec)	TL	300°C	°C

Description

The ML3406 is a high efficiency monolithic synchronous step-down regulator using a constant frequency, current mode architecture. The device is available in an adjustable version and fixed output voltages of 1.5V and 1.8V Supply current during operation is only 20A and drops to £1A in shutdown. The 2.5V to 5.5V input voltage range makes the ML3406 ideally suited for single LI-Ion battery-powered applications. 100% duty cycle provides low dropout
operation extending battery life in portable systems. Automatic Burst Mode operation increases efficiency at light loads, further extending battery life. Switching frequency of ML3406 is internally set at 1.5MHZ, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feed-back reference voltage. The ML3406 is available in a low profile SOT-23-5L package.