LTC3407EMSE Linear Technology, LTC3407EMSE Datasheet
LTC3407EMSE
Specifications of LTC3407EMSE
Available stocks
Related parts for LTC3407EMSE
LTC3407EMSE Summary of contents
Page 1
... In shutdown, the device draws <1μA. L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
Page 2
... Reference Voltage Line Regulation LINE REG ΔV Output Voltage Load Regulation LOAD REG 2 Junction Temperature (Note 5) ............................. 125°C + 0.3V Storage Temperature Range IN LTC3407EMSE ...................................– 65°C to 150° 0.3V LTC3407EDD ...................................... –65°C to 125° 0.3V Lead Temperature (Soldering, 10 sec) IN LTC3407EMSE only ........................................... 300°C 10 ...
Page 3
ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER I Input DC Supply Current S Active Mode Sleep Mode Shutdown f Oscillator Frequency OSC f Synchronization Frequency SYNC I Peak Switch Current Limit LIM R Top Switch ...
Page 4
LTC3407 TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Input Voltage 100 T = 25° 100mA 90 10mA 1mA 85 600mA 1.8V OUT CIRCUIT OF FIGURE INPUT VOLTAGE ...
Page 5
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load Current 100 95 2.7V 3. 1.2V Burst Mode OPERATION OUT CIRCUIT OF FIGURE 100 1000 LOAD CURRENT (mA) 3407 G13 ...
Page 6
LTC3407 BLOCK DIAGRAM REGULATOR 1 MODE/SYNC 6 + 0.6V EA – FB1 – 0.55V UVDET + + OVDET – 0.65V SHUTDOWN 2 RUN1 0.6V REF OSC 9 RUN2 REGULATOR 2 (IDENTICAL TO REGULATOR FB2 OPERATION ...
Page 7
OPERATION decrease causes the error amplifi increase the I voltage until the average inductor current matches the new load current. The main control loop is shut down by pulling the RUN pin to ground. Low Current Operation Two ...
Page 8
LTC3407 APPLICATIONS INFORMATION load currents. This causes a dip in effi ciency in the upper range of low current operation. In Burst Mode operation, lower inductance values will cause the burst frequency to increase. Inductor Core Selection Different core materials ...
Page 9
APPLICATIONS INFORMATION capacitors, such as Sanyo POSCAP , offer very low ESR, but have a lower capacitance density than other types. Tantalum capacitors have the highest capacitance density, but it has a larger ESR and it is critical that the ...
Page 10
... The percent effi ciency of a switching regulator is equal to the output power divided by the input power times 100 often useful to analyze individual losses to determine what is limiting the effi ciency and which change would Hot Swap is a trademark of Linear Technology Corporation regulator OUT ...
Page 11
APPLICATIONS INFORMATION produce the most improvement. Percent effi ciency can be expressed as: %Effi ciency = 100 ...) where L1, L2, etc. are the individual losses as a percent- age of input power. ...
Page 12
LTC3407 APPLICATIONS INFORMATION the regulator operating in a 70°C ambient temperature is approximately • 0.153 • 84°C J which is below the absolute maximum junction tempera- ture of 125°C. Design Example As a ...
Page 13
TYPICAL APPLICATIONS 1.8V OUT2 AT 600mA C3 10μF C1, C2, C3: TAIYO YUDEN JMK316BJ106ML Low Ripple Buck Regulators Using Ceramic Capacitors C1 10μF RUN2 V RUN1 IN POR LTC3407 L2 4.7μH 4.7μH ...
Page 14
LTC3407 TYPICAL APPLICATIONS 3.3V OUT2 AT 600mA C3 10μF C1, C2, C3: TAIYO YUDEN JMK316BJ106ML L1: MURATA LQH32CN2R2M33 L2: MURATA LQH32CN4R7M11 14 2mm Height Core Supply C1 10μF RUN2 V RUN1 IN ...
Page 15
... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
Page 16
... Synchronous Step Down DC/DC Converter LTC3414 4MHz, OUT Synchronous Step Down DC/DC Converter LTC3440/LTC3441 600mA/1. 2MHz/1MHz, OUT Synchronous Buck-Boost DC/DC Converter ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 2. 4.2V C1 10μ ...