Typical operating characteristics (continued) – Rainbow Electronics MAX1804 User Manual
Page 5
MAX1804
External Four-Input Feedback Integrator for
Power Supplies
_______________________________________________________________________________________
5
CH1 = I
LOAD
; 1.00A/div
CH5 = V
IN1
; 500mV/div; AC-COUPLED (C
COMP
= 1000pF)
CH4 = V
IN1
; 500mV/div; AC-COUPLED (C
COMP
= 470pF)
CH3 = V
IN1
; 500mV/div; AC-COUPLED (C
COMP
= 220pF)
CH2 = V
IN1
; 500mV/div; AC-COUPLED (MAX1804 DISABLED)
V
IN
(MAX1653) = 8V
100
µs/div
CH1
CH5
CH4
CH3
CH2
MAX1804toc07
LOAD TRANSIENT RESPONSE
(APPLICATION CIRCUIT OF FIGURE2)
CH1 = I
LOAD
; 500mA/div
CH2 = V
IN1
; 500mV/div; AC-COUPLED (C
COMP
= 0.047
µF)
CHR4 = V
IN1
; 500mV/div; AC-COUPLED (C
COMP
= 1000pF)
CHR3 = V
IN1
; 500mV/div; AC-COUPLED (C
COMP
= 2200pF)
CHR2 = V
IN1
; 500mV/div; AC-COUPLED (C
COMP
= 4700pF)
CHR1 = V
IN1
; 500mV/div; AC-COUPLED (MAX1804 DISABLED)
V
IN
(MAX603) = 8V
NOTE: Circuit of Figure 3.
400
µs/div
0.5
0.01
CH1
CH2
CHR4
CHR3
CHR2
CHR1
MAX1804toc08
LOAD TRANSIENT RESPONSE
CH1 = SHDN, 2V/div
CH2 = V
IN2
; 200mV/div; DC OFFSET = 4.7V
I
LOAD
=
0.5A
V
IN
(MAX1653) = 8V
NOTE: Circuit of Figure 2.
200
µs/div
CH1
CH2
MAX1804toc09
STARTUP/SHUTDOWN WAVEFORM
CHR1 = V
G(PFET)
; 5V/div
CH1 = V
IN1
; 200mV/div; DC OFFSET = 4.8V
CH2 = V
IN2
; 2V/div
V
IN
(MAX1653) = 8V
NOTE: Circuit of Figure 2.
200
µs/div
CHR1
CH1
CH2
MAX1804toc10
AUTOMATIC INPUT DISABLE WAVEFORM
IN2 ENABLE
IN2 DISABLE
IN2 DISABLE
Typical Operating Characteristics (continued)
(V
V
+ = V
SHDN
= 3.3V, V
ADJ
= 1.2V, V
OUT
= 2V, C
COMP
= 470pF, T
A
= +25
°C, unless otherwise noted.)