LTC1772BES6 LINER [Linear Technology], LTC1772BES6 Datasheet
LTC1772BES6
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LTC1772BES6 Summary of contents
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FEATURES TM Burst Mode Operation Disabled for Lower Output Ripple at Light Loads High Efficiency 94% High Output Currents Easily Achieved Wide V Range: 2.5V to 9.8V IN Constant Frequency 550kHz Operation Low Dropout: 100% Duty Cycle Output ...
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... Note 6: Peak current sense voltage is reduced dependent on duty cycle to and power a percentage of value as given in Figure INFORMATION ORDER PART NUMBER TOP VIEW LTC1772BES6 6 PGATE – SENSE S6 PART MARKING S6 PACKAGE 6-LEAD PLASTIC SOT-23 LTVU = 150 C, ...
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W U TYPICAL PERFORMANCE CHARACTERISTICS Reference Voltage vs Temperature 825 V = 4.2V IN 820 815 810 805 800 795 790 785 780 775 –55 –35 – 105 125 TEMPERATURE ( C) 1772 G01 Maximum ...
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LTC1772B U U FUNCTIONAL DIAGRA – V SENSE 15mV ICMP – OSC FREQ FOLDBACK SHORT-CIRCUIT DETECT + – GND 2 U OPERATIO (Refer to Functional Diagram) Main Control Loop The LTC1772B is a constant frequency ...
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U OPERATIO (Refer to Functional Diagram) up, the corresponding output current trip level follows, allowing normal operation. Comparator OVP guards against transient overshoots > 7.5% by turning off the external P-channel power MOSFET and keeping it off until the fault ...
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LTC1772B U OPERATIO (Refer to Functional Diagram) Overvoltage Protection As a further protection, the overvoltage comparator in the LTC1772B will turn the external MOSFET off when the feedback voltage has risen 7.5% above the reference voltage of 0.8V. This comparator ...
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U U APPLICATIONS INFORMATION where f is the operating frequency. Accepting larger values of I allows the use of low inductances, but results in RIPPLE higher output voltage ripple and greater core losses. A reasonable starting point for setting ripple ...
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LTC1772B U U APPLICATIONS INFORMATION where P is the allowable power dissipation and will be D determined by efficiency and/or thermal requirements. A fast switching diode must also be used to optimize efficiency. Schottky diodes are a good choice for ...
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U U APPLICATIONS INFORMATION Setting Output Voltage The regulated output voltage is determined by OUT R 1 For most applications, an 80k resistor is suggested for R1. To prevent stray pickup, locate resistors ...
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LTC1772B U U APPLICATIONS INFORMATION Foldback Current Limiting As described in the Output Diode Selection, the worst-case dissipation occurs with a short-circuited output when the diode conducts the current limit value almost continu- ously. To prevent excessive heating in the ...
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U TYPICAL APPLICATIO S LTC1772B High Efficiency, Small Footprint 3.3V to 1.8V/0.5A Regulator R4 10k C3 220pF R4 10k C3 220pF C1: TAIYO YUDEN CERAMIC LMK325BJ106K-T C2: AVXTPSE107M010R0100 D1: IR10BQ015 Information furnished by Linear Technology Corporation is believed to be ...
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LTC1772B U TYPICAL APPLICATIONS R4 10k C3 220pF C1: AVXTPSE476M016R0047 C2: AVXTPSE107M010R0100 D1: IR10BQ015 PACKAGE DESCRIPTION 2.6 – 3.0 (0.110 – 0.118) 1.50 – 1.75 (0.059 – 0.069) 0.35 – 0.55 (0.014 – 0.022) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS ...