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MAX1684EEE Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX1684EEE Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 16 page Low-Noise, 14V Input, 1A, PWM Step-Down Converters _______________________________________________________________________________________ 7 Pin Description Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) VIN 5V/div 0V VOUT 100mV/div 2ms/div LINE-TRANSIENT RESPONSE MAX1684/85-19 MAX1684, ILOAD = 100mA, VIN = 5V TO 10V, SYNC/PWM = 3.3V VSHDN 5V/div IIN 50mA/div 10ms/div START-UP CURRENT MAX1684/85-20 MAX1684, ILOAD = 100mA, VOUT = 3.3V, VIN = 5V, CILIM/SS = 0.1µF, SYNC/PWM = 3.3V PIN High-Side MOSFET Gate Bias. Bias voltage for P-channel switch. Bypass to IN with a 0.1µF capacitor. CVH 1 FUNCTION NAME Analog Supply Voltage Input. Connect to IN with a 0.2 in. metal trace. Bypass to PGND with a 0.1µF capacitor. AIN 2 Logic Supply Voltage Output and IC Logic Supply. Sources 5mA for external loads. Bypass to AGND with 1µF capacitor. CVL 4 Supply Voltage Input IN 3 Reference Output. 1.25V reference output supplies 10µA for external loads. Bypass to AGND with 0.1µF capacitor. REF 6 Integrator Capacitor Connection. Connect a 0.01µF capacitor to AGND. CC 8 Dual Mode Feedback Input. Connect FB to VOUT for 1.25V output. Connect to an external resistor divider to adjust the output voltage. Connect to AGND to set output voltage to 3.3V. FB 7 Analog Ground AGND 5 Current-Limit Adjust/Soft-Start Input. See Current Limit and Soft-Start section. ILIM/SS 10 Bootstrap Input. Connection for the bootstrap switch and internal feedback path. Connect BOOT to VOUT for VOUT < 5.5V. Connect BOOT to AGND for VOUT > 5.5V. BOOT 12 Standby Control Input. Connect to CVL for normal operation. Connect to AGND for low-power mode (Table 1). This pin overrides SYNC/PWM setting. STBY 11 Active-Low Shutdown Input. Connect to ground for shutdown. SHDN can withstand the input voltage. SHDN 15 Power Ground PGND 16 Inductor Connection. Drain for internal P-channel MOSFETs. Connect inductor from LX to OUT. LX 13, 14 SYNC/PWM Input: For synchronized-PWM operation, drive with TTL level, 50% square wave. Connect to CVL for PWM mode. Connect to AGND for normal mode. SYNC/PWM 9 |
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