LTC3225EDDB#PBF Linear Technology, LTC3225EDDB#PBF Datasheet
LTC3225EDDB#PBF
Specifications of LTC3225EDDB#PBF
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LTC3225EDDB#PBF Summary of contents
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FEATURES n Low Noise Constant Frequency Charging of Two Series Supercapacitors n Automatic Cell Balancing Prevents Capacitor Overvoltage During Charging n Programmable Charge Current (Up to 150mA) n Selectable 2.4V or 2.65V Regulation per Cell (LTC3225) n Selectable 2V or ...
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LTC3225/LTC3225-1 ABSOLUTE MAXIMUM RATINGS (Note GND ......................................... –0. OUT SHDN, V ...................................... –0. SEL C Short-Circuit Duration ............................. Indefi nite OUT I Continuous (Note 2) ......................................350mA VIN I Continuous (Note ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER V Input Voltage Range IN V Charge Termination Voltage COUT Sleep Mode Threshold (Rising Edge) V Output Comparator Hysteresis COUT-HYS V Maximum Voltage Across Each of the TOP/BOT ...
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LTC3225/LTC3225-1 TYPICAL PERFORMANCE CHARACTERISTICS (T = 25° 1μ 2.2μ FLY IN TOP OUT PROG 160 4.5V (LTC3225) 140 OUT 120 100 80 60 ...
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TYPICAL PERFORMANCE CHARACTERISTICS (T = 25° 1μ 2.2μ FLY IN TOP Charging Profi le with Unequal Initial Output Capacitor Voltage (Initial 1.3V) TOP BOT SHDN 5V/DIV I ...
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LTC3225/LTC3225-1 SIMPLIFIED BLOCK DIAGRAM RUN i PROG 7 R PROG 1.2V 1.088V (LTC3225) 1.067V (LTC3225-1) V SEL 6 OPERATION The LTC3225/LTC3225-1 are dual cell supercapacitor char- gers. Their unique topology maintains a constant output voltage with programmable charge current. Their ...
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OPERATION Once the output voltage is charged to the preset volt- age threshold, the part shuts down the internal charge pump and enters into a low current state. In this state, the LTC3225/LTC3225-1 consume only about 20μA from the input ...
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LTC3225/LTC3225-1 APPLICATIONS INFORMATION Programming Charge Current The charge current is programmed with a single resistor connecting the PROG pin to ground. The program resistor and the input/output charge currents are calculated using the following equations: 3600V = I VIN R ...
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APPLICATIONS INFORMATION V Capacitor Selection IN The type and value of C controls the amount of ripple IN present at the input pin ( reduce noise and ripple recommended that low equivalent series resistance (ESR) ...
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LTC3225/LTC3225-1 APPLICATIONS INFORMATION Table 1 contains a list of ceramic capacitor manufacturers and how to contact them. Table 1. Capacitor Manufacturers AVX www.avx.com Kemet www.kemet.com Murata www.murata.com Taiyo Yuden www.t-yuden.com Vishay www.vishay.com TDK www.component.tdk.com Layout Considerations Due to the high ...
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TYPICAL APPLICATION OUT + LTC3225 1μF LTC3225-1 – C GND SHDN C4 2.2μF V SEL PROG R1 12k 5V Supercapacitor Back-Up Supply Q2 Si4421DY C5 22μF Q1 Si4421DY LTC4412 C2 ...
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LTC3225/LTC3225-1 PACKAGE DESCRIPTION 0.64 0.05 (2 SIDES) 0.70 0.05 2.55 0.05 1.15 0.05 PACKAGE OUTLINE 0.25 0.05 0.50 BSC 2.39 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING CONFORMS TO VERSION (WECD-1) IN JEDEC PACKAGE OUTLINE ...
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... Updated Typical Application and Related Parts. 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. ...
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... C GND 10V 3225 TA03 : 2.2V to 16V, IN < 1μA, ThinSOT™ Package SD < 1μA, 2mm × 3mm 6-Lead DFN Package SD < 1μA, 3mm × 3mm 10-Lead DFN Driver SD LT 0610 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 3225fb ...