LTC3530 LINER [Linear Technology], LTC3530 Datasheet
LTC3530
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LTC3530 Summary of contents
Page 1
... BURST pin to GND. Other features include 1μA shutdown, short circuit pro- tection, programmable soft-start control, current limit and thermal shutdown. The LTC3530 is available in a thermally enhanced 10-lead (3mm × 3mm) DFN or MSOP package. L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. ...
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... TAPE AND REEL LTC3530EDD#PBF LTC3530EDD#TRPBF LTC3530EMS#PBF LTC3530EMS#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi ...
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... Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3530E is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlations with statistical process controls ...
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... TEMPERATURE (°C) 3530 G05 Switch Pins Before Entering Boost Mode SW1 2V/DIV SW2 2V/DIV 115 50ns/DIV 3.3V AT 500mA OUT 3530 G08 LTC3530 Output Ripple 500mA Load 4.2V IN 3530 G11 1μs/DIV V = 3.3V OUT 20mV/DIV AC COUPLED C = 22μF, X5R CERAMIC ...
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... SW2 (Pin 4): Switch Pin Where the Internal Switches C and D are Connected. For applications with output voltages over 4.3V, a Schottky diode is required from SW2 ensure the SW pin does not exhibit excessive voltage. LTC3530 = 25°C, unless otherwise specifi ed. A Typical Burst Mode Waveforms ...
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... LTC3530 PIN FUNCTIONS GND (Pin 5): Ground for the IC. V (Pin 6): Output of the Synchronous Rectifi er. A fi lter OUT capacitor is placed from V to GND. A ceramic bypass OUT capacitor is recommended as close to the V pins as possible. V (Pin 7): Input Supply Voltage. Internal 10μF ceramic capacitor is recommended as close to the V and GND pins as possible ...
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... SW2 3 4 NMOS B Figure 1. Simplifi ed Diagram of Output Switches Internal Current Limit There are two different current limit circuits in the LTC3530. Each has internally fi xed thresholds which vary inversely with The fi rst circuit is a high speed peak current limit compara- tor that will shut off switch A once the current exceeds 2 ...
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... During Burst Mode operation the LTC3530 delivers energy to the output until it is regulated and then goes into sleep mode where the outputs are off and quiescent current drops to 40μA (typ). ...
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... To prevent this, the LTC3530 incorporates an active clamp circuit that holds the voltage optimal voltage during Burst Mode operation. ...
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... V C raised above 1.6V. COMPONENT SELECTION Inductor Selection The high frequency operation of the LTC3530 allows the use of small surface mount inductors. The inductor ripple current is typically set to 20% to 40% of the maximum inductor current. For a given ripple the inductance terms are given as follows: V • ...
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... Sanyo (619) 661-6322 Taiyo Yuden (408) 573-4150 TDK (847) 803-6100 Output Voltage < 1.8V The LTC3530 can operate as a buck converter with output voltages as low as 0.4V. Synchronous switch D is powered from V and the R OUT DS(ON) ages, therefore a Schottky diode is required from SW2 provide the conduction path to the output ...
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... Closing the Feedback Loop The LTC3530 incorporates voltage mode PWM control. The control to output gain varies with operation region (buck, boost, buck/boost), but is usually no greater than 15. The output fi lter exhibits a double pole response, as ...
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... CELL CHRG C SS 0.01μF ACPR R 33.2k GND 97.6k LTC3530 V OUT 3.3V 500mA 15k C Z1 33pF C OUT 22μF R2 576k 3530 TA02 L1 4.7μH SW1 SW2 LTC3530 OUT 15k SHDN/ 33pF Z R BURST C T 10k P1 560pF R2 GND 576k BURST ...
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... LTC3530 TYPICAL APPLICATIONS High Effi ciency Li-Ion Powered Constant Current Lumiled Driver V IN 2. 10μ R1/1.5 12,810 (R1+R2+R3+R4 LED D1 = BAT54 14 L1 3.3μH SW1 SW2 OUT D1 LTC3530 OFF ON SD/ 1nF 100k 100k R BURST T C GND BURST 470pF 44.2k 95. TAIYO YUDEN JMK212BJ106MG ...
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... TOP AND BOTTOM OF PACKAGE MS Package 10-Lead Plastic MSOP (Reference LTC DWG # 05-08-1661) DETAIL “A” 0.254 (.010) 0° – 6° TYP GAUGE PLANE 0.53 ± 0.152 (.021 ± .006) DETAIL “A” 0.18 (.007) LTC3530 R = 0.115 TYP 6 10 3.00 ±0.10 1.65 ± 0.10 (4 SIDES) (2 SIDES 0.75 ±0.05 2.38 ± 0.10 (2 SIDES) 0.00 – ...
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... ThinSOT is a trademark of Linear Technology Corporation. 16 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● USB to 5V Converter with Output Disconnect L1 1nF D1** 10μ SW1 SW2 D2** LTC3530 OUT 8 9 SHDN/ BURST 0.1μ ...