EL7535 INTERSIL [Intersil Corporation], EL7535 Datasheet
EL7535
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EL7535 Summary of contents
Page 1
... The EL7535 features PWM mode control. The operating frequency is typically 1.4MHz. Additional features include <1µA shut-down current, short-circuit protection, and over- temperature protection. The EL7535 is available in the 10-pin MSOP package and is specified for operation over the full -40°C to +85°C temperature range. Ordering Information ...
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... OLPOR AC CHARACTERISTICS F PWM Switching Frequency PWM t Minimum RSI Pulse Width RSI t Soft-start Time SS t Power On Reset Delay Time POR 2 EL7535 Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA + +0.3V) Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85° +0.3V) Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C IN Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +145° 3.3V 10µ ...
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... Enable 8 POR Power on reset open drain output 9 VO Output voltage sense 10 FB Voltage feedback input; connected to an external resistor divider between V output Timing Diagram V O RSI POR 3 EL7535 PIN FUNCTION MIN 25ns 100ms 100ms and SGND for variable O FN7003.2 August 16, 2005 ...
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... Block Diagram 10pF 124K 100K CLOCK 1.4MHz EN EN SOFT- START 10µF + BANDGAP – REFERENCE 5V SGND RSI 4 EL7535 PWM COMPEN- + SATION - PWM COMPARATOR CONTROL RAMP LOGIC GENERATOR UNDER- VOLTAGE LOCKOUT TEMPERATURE SENSE POR + CURRENT LIMIT P-DRIVER LX 1.8µ 1.8V 350mA 10µ ...
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... AMBIENT TEMPERATURE (°C) FIGURE 3. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE Waveforms All waveforms are taken at V =3.3V, V =1.8V 0.5ms/DIV FIGURE 5. START- EL7535 100 V =3. =2.5V O 300 400 100 125 150 FIGURE 4. PACKAGE POWER DISSIPATION vs AMBIENT =350mA with component values shown on page 1, unless otherwise noted ...
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... O 50ms/DIV FIGURE 7. POR FUNCTION Applications Information Product Description The EL7535 is a synchronous, integrated FET 350mA step- down regulator which operates from an input of 2.5V to 6V. The output voltage is user-adjustable with a pair of external resistors. The internally-compensated controller makes it possible to use only two ceramic capacitors and one inductor to form a complete, very small footprint 350mA DC/DC converter ...
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... When the EN pin is connected to a logic low, the EL7535 is in the shut-down mode. All the control circuitry and both MOSFETs are off, and V falls to zero. In this mode, the OUT total input current is less than 1µA. ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 8 EL7535 FN7003.2 August 16, 2005 ...