LTC3525-3 LINER [Linear Technology], LTC3525-3 Datasheet
![no-image](/images/no-image-200.jpg)
LTC3525-3
Related parts for LTC3525-3
LTC3525-3 Summary of contents
Page 1
... All other trademarks are the property of their respective owners. Patents Pending 100 OUT 3. OUT 60mA 50 GND 10µ 3525 TA01 20 LTC3525-3/ 400mA Micropower U LTC3525-3.3 Effi ciency and Power Loss vs Load Current 100 10 EFFICIENCY 1 POWER LOSS 0 2. 1.2V IN 0.01 0.01 0 100 1000 LOAD (mA) LT3525 • ...
Page 2
... Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. (LTC3525-3) CONDITIONS (Note 6) ⎯ S ⎯ H ⎯ D ⎯ (Note 4) IN ⎯ ...
Page 3
... Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specifi ed maximum operating junction temperature may impair device reliability. Note 6: Consult LTC Marketing for other output voltage options. LTC3525-3/ = 25°C. A MIN TYP ...
Page 4
... TYPICAL PERFOR A CE CHARACTERISTICS Maximum Output Current (for V to Drop 2.5%) OUT 300 LTC3525-3.3 250 200 LTC3525-3 LTC3525-5 150 100 50 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 V (V) IN 3525 G01 LTC3525-3 Effi ciency and Power Loss vs Load 100 100 EFFICIENCY POWER LOSS 0.01 0.01 0 100 ...
Page 5
... G09 Light Load Burst Frequency vs Load 10µF OUT 22µF OUT 5 0 0.1 1 LOAD (mA) 3525 G12 LTC3525-3.3 Input Current and V at Startup OUT OUT 1V/DIV INPUT CURRENT 100mA/DIV 500µs/DIV LTC3525-3.3/LTC3525-5 LTC3525-5 Load Regulation 2 3.6V IN 2.0 1.5 1 ...
Page 6
... LTC3525-5 Output Voltage Ripple I = OUT 5mA I = OUT 50mA I = OUT 150mA 50µs/DIV 22µF OUT LTC3525-3.3 50mA Load Step Response OUTPUT RIPPLE 50mV/DIV LOAD CURRENT 20mA/DIV 3525 G21 500µs/DIV 22µF OUT 25°C unless otherwise noted. A LTC3525-3 ...
Page 7
... I PK COMPARATOR LOGIC I – VAL + I VALLEY COMPARATOR WAKE INTEGRATOR COMPARATOR ADJUST 5 2 GND GND LTC3525-3/ to GND, close to the IC. A minimum value of when ⎯ S ⎯ H ⎯ D ⎯ <0.4V. IN after the inductor current has dropped WELL SWITCH 4 + – OFFSET ADJUST FB – + ...
Page 8
... LTC3525-3/ LTC3525-3.3/LTC3525-5 U OPERATIO The LTC3525 is a high performance Burst Mode operation only, synchronous boost converter requiring only three small external components. Its simplicity and small size make it a high effi ciency alternative to charge pump designs designed to start up from a single alkaline or nickel cell, with input voltages as low as 1V, or from two or three cells (or a Li-ion battery), with voltages as high as 4 ...
Page 9
... Figure 1. Inductor Current Changing as a Function of Load full load using the minimum recommended 10µF output capacitor for the LTC3525-3.3 and a 22µF capacitor for the LTC3525-5 (due to the capacitor’s DC bias effect). An antiring circuit damps any oscillation at the switch node when the inductor current falls to zero ...
Page 10
... LTC3525-3/ LTC3525-3.3/LTC3525-5 U OPERATIO Component Selection Inductor values between 4.7µH and 15µH are recom- mended. In most applications 10µH will yield the best compromise between size and effi ciency. The inductor should be a low-loss ferrite design and must be rated for peak currents of at least 400mA without saturating. Induc- tors with lower DC resistance will improve effi ...
Page 11
... OUT 140mA Li-ion 5 GND 10µF 3525 TA05 U SC6 Package 6-Lead Plastic SC70 (Reference LTC DWG # 05-08-1638) 0.10 – 0.30 0.10 – 0.18 (NOTE 3) 0.80 – 1.00 0.00 – 0.10 REF LTC3525-3/ 6.8µH* LTC3525-3 SHDN V OUT 2 5 GND GND 1µF 3525 TA04 *COILCRAFT LPO3310-682MXD **MURATA GRM219R60J106KE191D Li-Ion to 5V 10µ ...
Page 12
... LTC3525-3/ LTC3525-3.3/LTC3525-5 U TYPICAL APPLICATIO 3.3V RELATED PARTS PART NUMBER DESCRIPTION ® LT 1615/LT1615-1 300mA/80mA (I ), High Effi ciency Step-Up DC/DC Converter SW LTC1751-3.3/ 100mA, 800kHz, Micropower, Regulated Charge Pump LTC1751-5 DC/DC Converters LT1930/LTC1930A 1.2MHz/2MHz, High Effi ciency Step-Up DC/DC Converter SW LTC3200-5 100mA, 2MHz, Regulated 5V Charge Pump ...