LTC3526 Linear Technology, LTC3526 Datasheet
LTC3526
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LTC3526 Summary of contents
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... EMI concerns by damping the inductor in discon- tinuous mode. Additional features include a low shutdown current of under 1μA and thermal shutdown. The LTC3526/LTC3526B are housed in a 2mm × 2mm × 0.75mm DFN package. , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation ...
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... V = 1.2V CONDITIONS I = 1mA LOAD 0°C to 85° 1.30V 0V, Not Including Switch Leakage, V SHDN OUT Measured Nonswitching, LTC3526 Only OUT Measured > 1.230V OUT 5V OUT V = 3.3V OUT V = 3.3V ...
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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3526E is guaranteed to meet performance specifi cations from 0°C to 85°C. Specifi cations over –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Specifi ...
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... LTC3526/LTC3526B TYPICAL PERFORMANCE CHARACTERISTICS Start-Up Delay Time 100 www.DataSheet4U.com 1.0 2.0 2.5 3.0 3.5 4.0 1.5 V (V) IN Burst Mode Threshold Current 3.3V OUT 10μF OUT L = 4.7μ LEAVE BURST ENTER BURST 1.0 1.5 2.0 2 DS(ON) OUT 0.90 0.85 0.80 0.75 0.70 0.65 PMOS 0.60 0.55 0.50 0.45 NMOS ...
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... Burst Mode Waveforms SW PIN 2V/DIV V OUT 20mV/DIV AC COUPLED INDUCTOR CURRENT 0.2A/DIV 3526 G16 V = 1.2V 10μs/DIV 3.3V OUT C = 10μF OUT AC COUPLED 3526 G19 100μs/DIV LTC3526/LTC3526B Burst Mode Current vs V 10.0 9.5 9.0 8.5 8.0 7.5 7.0 3.5 1.5 2.0 2.5 3 (V) OUT 3526 G14 V and I During Soft-Start OUT ...
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... LTC3526/LTC3526B TYPICAL PERFORMANCE CHARACTERISTICS Load Step Response (Fixed Frequency) V OUT 100mV/DIV AC COUPLED LOAD CURRENT 50mA/DIV 3.3V OUT 50mA TO 100mA STEP www.DataSheet4U.com C = 10μF OUT ELECTRICAL CHARACTERISTICS SW (Pin 1): Switch Pin. Connect inductor between SW and V . Keep PCB trace lengths as short and wide as possible IN to reduce EMI ...
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... CONDUCTION I PK COMP V REF ZERO START-UP LOGIC MODE CLK CONTROL 1MHz OSC TSD WAKE THERMAL SHUTDOWN EXPOSED PAD GND 7 2 LTC3526/LTC3526B WELL SWITCH V OUT FB + – I ZERO COMP Σ SLOPE COMP – + ERROR AMP SLEEP COMP + V REF – CLAMP C SS 3526 BD ...
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... N-chan- DS(ON) nel MOSFET switch and P-channel MOSFET synchronous rectifi er, the LTC3526 achieves high effi ciency over a wide range of load currents. Automatic Burst Mode operation maintains high effi ciency at very light loads, reducing the quiescent current to just 9μA. Operation can be best understood by referring to the Block Diagram ...
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... Raising the inductor value will lower the load current at which Burst Mode operation is entered. is close the In Burst Mode operation, the LTC3526 still switches at a OUT IN fi xed frequency of 1MHz, using the same error amplifi er and loop compensation for peak current mode control. ...
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... Figure 1. Recommended Component Placement for Single Layer Board 10 COMPONENT SELECTION Inductor Selection The LTC3526/LTC3526B can utilize small surface mount chip inductors due to their fast 1MHz switching frequency. Inductor values between 3.3μH and 6.8μH are suitable for most applications. Larger values of inductance will allow ...
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... Y5V types should not be used. The internal loop compensation of the LTC3526 is designed to be stable with output capacitor values of 4.7μF or greater (without the need for any external series resistor). Although ceramic capacitors are recommended, low ESR tantalum capacitors may be used as well ...
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... TYPICAL APPLICATIONS 4.7μ 1.6V TO 3.2V 1μF LTC3526 SHDN OFF ON GND www.DataSheet4U.com 4.7μ 1.6V 1μF LTC3526 SHDN OFF ON GND *SUMIDA CDRH3D16-4R7 12 1-Cell to 1.8V Converter with <1mm Maximum Height V OUT 3.3V V OUT 200mA 1.78M FB 4.7μF 1M 3526 TA01a 1-Cell to 2.85V Converter V OUT 2.85V ...
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... 3.2V 1μF LTC3526 SHDN OFF ON GND *TAIYO-YUDEN NP03SB4R7M 1-Cell to 3.3V V OUT 3.3V 75mA 1.78M 22pF 10μF 1M 3526 TA04a 2-Cell to 3.3V V OUT 3.3V V OUT 200mA 1.78M FB 4.7μF 1M 3526 TA05a LTC3526/LTC3526B 100 V = 3.3V OUT 0.01 0 100 1000 ...
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... FB 10μF 1.02M 3526 TA06a 3.3V Converter with Output OR’d with 5V USB Input MBR120ESFT 5V USB 4.7μ BATT OUT 1.78M 1μF LTC3526 SHDN OFF ON FB GND 1M Li-Ion OUT 5V 200mA 3.24M 22pF 10μF 1.02M 3526 TA08a 100 OUT ...
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... DC Package 6-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1703) 0.675 ±0.05 PIN 1 BAR PACKAGE TOP MARK OUTLINE (SEE NOTE 6) 0.25 ± 0.05 0.200 REF 0.50 BSC LTC3526/LTC3526B R = 0.115 0.38 ± 0.05 TYP 4 6 0.56 ± 0.05 (2 SIDES) 2.00 ±0.10 (4 SIDES 0.50 BSC 0.75 ± ...
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... LTC3526/LTC3526B RELATED PARTS PART NUMBER DESCRIPTION ® LT 1613 800mA I , 1.4MHz, Step-Up DC/DC Converter SW LT1615 350mA I , Micropower, Step-Up DC/DC Converter SW LT1618 1. 1.4MHz, Constant Current/Constant Voltage SW Step-Up DC/DC Converter LT1930/LT1930A 1.2MHz/2.2MHz, Step-Up DC/DC Converters SW LTC3400/LTC3400B 600mA I , 1.2MHz, Synchronous Step-Up SW DC/DC Converters www.DataSheet4U.com LTC3401 3MHz, Synchronous Step-Up DC/DC Converter ...