AIC1570 Datasheet, PDF (5/18 Pages) Analog Intergrations Corporation – 5-bit DAC, Synchronous PWM Power Regulator with LDO and Linear Controller

TYPICAL PERFORMANCE CHARACTERISTICS
U_GATE
U_GATE
AIC1570
L_GATE
L_GATE
FIG.1 The gate drive waveforms
60
C_UGATE=C_LGATE=C_GATE
50 ^VCC=12V
40
C_GATE=5000pF
30
C_GATE=2000pF
20
10
C_GATE=660pF
0
100
150
200
250
300
350
400
Switching Frequency (KHz)
FIG. 2 Bias Supply Current VS. Frequency
10000
1000
R_T Pull Up to +12V
100
R_T Pull Down to GND
10
1
100 150
200
250
450
300
350
400
Switching Frequency (KHz)
FIG. 3 R_T Resistance VS. Frequency
SS (2V/div)
PGOOD (5V/div)
V_OUT1 (1V/div)
V_OUT2 (1V/div)
V_OUT3 (1V/div)
SS
VDAC=3.5V
VDAC=2V
VDAC=1.3V
FIG.4 Soft Start Interval with 3 Outputs and PGOOD
FIG. 5 Soft Start Initiates PWM Output
5