el7531 Intersil Corporation, el7531 Datasheet
el7531
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el7531 Summary of contents
Page 1
... Additional features include a Power-Good output, <1µA shut-down current, short-circuit protection, and over-temperature protection. The EL7531 is available in the 10 Ld MSOP package, making the entire converter occupy less than 0.15 in PCB area with components on one side only. The 10 Ld MSOP package is specified for operation over the full -40° ...
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... Value Voltage Drop OLPG AC CHARACTERISTICS F PWM Switching Frequency PWM t Minimum SYNC Pulse Width SYNC t Soft-start Time SS 2 EL7531 = 25°C) Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A + +0.3V) Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85° +0.3V) Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C IN Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125° 3.3V 10µ 1.8µH, V ...
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... 100K SYNC SYNC CLOCK EN EN SOFT- START 10µF + 3.3V BANDGAP – REFERENCE SGND 3 EL7531 Voltage feedback input; connected to an external resistor divider between V PWM + COMPENSATION - PWM COMPARATOR PFM RAMP ON-TIME GENERATOR CONTROL + - PWM COMPARATOR UNDER- VOLTAGE LOCKOUT TEMPERATURE SENSE ...
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... 1. 1.38 1.36 1.34 1.32 - (°C) A FIGURE JUNCTION TEMPERATURE (PWM MODE EL7531 = 1.8V with component values shown on page 1 at room ambient temperature, unless otherwise 1. 1.000 V = 3.3V IN 0.100 1.000 = 3. 100 ...
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... FIGURE 9. NO LOAD QUIESCENT CURRENT (PFM MODE) 1 0.6 0.2 0 -0.2 -0.6 0 200 400 600 I (mA) O FIGURE 11. LOAD REGULATION (PWM MODE) 5 EL7531 (Continued) = 1.8V with component values shown on page 1 at room ambient temperature, unless otherwise 100 150 FIGURE 8. NO LOAD QUIESCENT CURRENT (PWM MODE) 5.0 5.5 6.0 12MHz 1 ...
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... IN O noted. 200µs/DIV FIGURE 13. START- 2µs/DIV FIGURE 15. PFM STEADY-STATE OPERATION WAVEFORM (I = 100mA) O 0.2µs/DIV FIGURE 17. EXTERNAL SYNCHRONIZATION TO 2MHz 6 EL7531 (Continued) = 1.8V with component values shown on page 1 at room ambient temperature, unless otherwise (2V/DIV (0.5A/DIV (2V/DIV) ...
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... FIGURE 19. LOAD TRANSIENT RESPONSE (22mA to 1A) 50µs/DIV FIGURE 21. PWM LOAD TRANSIENT RESPONSE (0.25A TO 0.75A) I =50mA O 2µs/DIV FIGURE 23. PFM-PWM TRANSITION TIME 7 EL7531 (Continued) = 1.8V with component values shown on page 1 at room ambient temperature, unless otherwise (0.5A/DIV) ∆V O (100mV/DIV) FIGURE 20 ...
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... AMBIENT TEMPERATURE (°C) FIGURE 25. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE 8 EL7531 (Continued) = 1.8V with component values shown on page 1 at room ambient temperature, unless otherwise O 85 100 125 FIGURE 26. PACKAGE POWER DISSIPATION vs AMBIENT JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD ...
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... The inductor current limit is gradually increased to ensure proper soft-start operation. When the EN pin is connected to a logic low, the EL7531 is in the shut-down mode. All the control circuitry and both MOSFETs are off, and V total input current is less than 1µA. ...
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... EN pin connects to logic HI. Thermal Performance The EL7531 is available in a fused-lead MSOP10 package. Compared with regular MSOP10 package, the fused- lead package provides lower thermal resistance. The θ 100°C 4-layer board and 125°C/W on 2-layer board. ...
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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 11 EL7531 MDP0043 A MINI SO PACKAGE FAMILY ...