Datasheet

Data Sheet ADP1874/ADP1875
Rev. A | Page 17 of 44
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
T
A
= 25°C
09347-058
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
)
T
A
= 25°C
09347-059
Figure 59. Upper Side Driver Rising and Lower Side Falling Edge Waveforms
(C
IN
= 4.3 nF (Upper Side/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
)
T
A
= 25°C
09347-060
Figure 60. Upper Side Driver Falling and Lower Side Rising Edge Waveforms
(C
IN
= 4.3 nF (Upper Side/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)
VREG = 5.5V
VREG = 3.6V
VREG = 2.7V
09347-061
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)
VREG (V)
+125°C
+25°C
–40°C
09347-062
Figure 62. Transconductance (G
m
) vs. VREG
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)
VREG (V)
09347-163
Figure 63. Quiescent Current vs. VREG