Datasheet

ADP1872/ADP1873 Data Sheet
Rev. B | Page 16 of 40
2
CH2 5V
CH3 5V
MATH 2V 40ns
CH4 2V
M40ns A CH2 4.20V
T 29.0%
3
M
4
HIGH SIDE
HS MINUS
SW
SW NODE
LOW SIDE
08297-058
T
A
= 25°C
Figure 58. Output Drivers and SW Node Waveforms
2
CH2 5V
CH3 5V
MATH 2V 40ns
CH4 2V
M40ns A CH2 4.20V
T 29.0%
3
M
4
HIGH SIDE
HS MINUS
SW
SW NODE
LOW SIDE
16ns ( t
f , DRVL
)
25ns ( t
r , DRVH
)
22ns ( t
pdh , DRVH
)
08297-059
T
A
= 25°C
Figure 59. Upper Side Driver Rising and Lower Side Falling Edge Waveforms
(C
GATE
= 4.3 nF (Upper/Lower Side MOSFET),
Q
TOTAL
= 27 nC (V
GS
= 4.4 V (Q1), V
GS
= 5 V (Q3))
2
CH2 5V
CH3 5V
MATH 2V 20ns
CH4 2V
M20ns A CH2 4.20V
T 39.2%
3
M
4
HIGH SIDE
HS MINUS
SW
SW NODE
LOW SIDE
18ns ( t
r , DRVL
)
24ns ( t
pdh , DRVL
)
11ns ( t
f , DRVH
)
08297-060
T
A
= 25°C
Figure 60. Upper Side Driver Falling and Lower Side Rising Edge Waveforms
(C
GATE
= 4.3 nF (Upper/Lower Side MOSFET),
Q
TOTAL
= 27 nC (V
GS
= 4.4 V (Q1), V
GS
= 5 V (Q3))
570
550
530
510
490
470
450
430
–40 –20 120100806040200
TRANSCONDUCTANCE (µS)
TEMPERATURE (°C)
V
DD
= 5.5V
V
DD
= 3.6V
V
DD
= 2.7V
08297-061
Figure 61. Transconductance (G
M
) vs. Temperature
680
330
380
430
480
530
580
630
2.7 3.0 5.44.8 5.14.54.23.93.63.3
TRANSCONDUCTANCE (µS)
V
DD
(V)
+125°C
+25°C
–40°C
08297-062
Figure 62. Transconductance (G
M
) vs. V
DD
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
0.75
0.70
2.7 5.55.14.74.3
–40°C
+25°C
+125°C
3.93.53.1
QUIESCENT CURRENT (mA)
V
DD
(V)
08297-163
Figure 63. Quiescent Current vs. V
DD
(VIN = 13 V)