isl8500 Intersil Corporation, isl8500 Datasheet - Page 9

• Manufacturer Part Number: isl8500
• Description: 2a Standard Buck Pwm Regulator
• Manufacturer: Intersil Corporation

Typical Performance Curves
PHASE 10V/DIV
EN 5V/DIV
PG 5V/DIV
VOUT 1V/DIV
IL 1A/DIV
FIGURE 16. SOFT-START AT FULL LOAD (2ms/DIV)
FIGURE 18. OUTPUT SHORT CIRCUIT (5µs/DIV)
FIGURE 14. LOAD TRANSIENT (200µs/DIV)
IL 1A/DIV
IL 2A/DIV
9
C
power stage and the source for the internal linear regulator that provides bias for the IC. Place a
ceramic capacitor from VIN to GND, close to the IC for decoupling (typical 10µF).” on page 6.
Unless otherwise noted, operating conditions are: T
(Continued)
OUT
SS 5V/DIV
VOUT RIPPLE
100mV/DIV
PHASE 10V/DIV
PG 5V/DIV
VOUT 2V/DIV
= 100µF, C
2
ISL8500
= 2x22µF, I
OUT
FIGURE 19. OUTPUT SHORT CIRCUIT RECOVERY (1ms/DIV)
EN 5V/DIV
EN 5V/DIV
PG 5V/DIV
IL 2A/DIV
IL 0.5mA/DIV
= 0A to 2A. See “The input supply for the PWM regulator
FIGURE 15. SOFT-START AT NO LOAD (2ms/DIV)
FIGURE 17. SHUT DOWN CIRCUIT (100µs/DIV)
PG 5V/DIV
IL 2A/DIV
A
= +25°C, V
IN
= 12V, EN = VDD, L = 10µH,
PG 5V/DIV
SS 5V/DIV
PHASE 10V/DIV
VOUT 2V/DIV
VOUT 2V/DIV
VOUT 2V/DIV
December 10, 2007
FN6611.0