Datasheet

ADP1850 Data Sheet
Rev. A | Page 10 of 32
CH1 20mV
B
W
CH4 5A Ω
M200µs A CH4 11.5A
1
4
V
IN
= 12V
V
OUT
= 3.3V
8A TO 13A STEP LOAD
OUTPUT RESPONSE
09440-011
Figure 10. Step Load Transient of Figure 44
2
CH3 1V
CH2 5VCH1 5V
CH4 1A Ω
M1ms A CH1 2.4V
V
IN
= 12V
V
OUT
= 1.8V
OUTPUT PRECHARGED TO 1V
DH1
DL1
VOUT1
IL1
1
3
4
09440-012
Figure 11. Soft Start into Precharged Output
CH3 1V
CH2 2VCH1 10V
CH4 1V
M10ms A CH2 1.52V
C
SS
= 100nF
V
OUT
(CH3)
SS (CH4)
EN
SW
1
2
3
4
09440-013
Figure 12. Enable Start-Up Function
CH3 2V
CH2 2VCH1 10V
CH4 2V Ω
M10ms A CH2 3.76V
SW1
PGOOD1
VCCO (CH3)
V
OUT
, PRELOADED (CH4)
1
2
3
4
09440-014
Figure 13. Thermal Shutdown Waveform
–2.5
–2.0
–1.5
–1.0
–0.5
0
0.5
3 5 7 9 11 13 15 17 19 21
CHANGE IN
f
SW
(%)
V
IN
(V)
REFERENCED AT V
IN
= 2.75V
600kHz
300kHz
850kHz
09440-015
Figure 14. Change in f
SW
vs. V
IN
–2.5
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
–40 –15 10 35 60 85 110 135
CHANGE IN f
SW
(%)
TEMPERATURE (°C)
V
IN
= 12V; REFERENCED AT 25°C
09440-016
Figure 15. f
SW
vs. Temperature