ADP1882 Analog Devices, ADP1882 Datasheet - Page 16

• Manufacturer Part Number: ADP1882
• Description: Synchronous Current-Mode Buck Controller with Constant On-time and 0.8 V Reference Voltage
• Manufacturer: Analog Devices

ADP1882/ADP1883
Figure 60. Upper-Side Driver Rising and Lower-Side Falling Edge Waveforms
M
M
1
4
3
2
4
3
2
4
3
2
CH1 1V
CH3 10V
CH3 5V
MATH 2V 40ns
CH3 5V
MATH 2V 40ns
OUTPUT VOLTAGE
LOW SIDE
SW NODE
INDUCTOR CURRENT
LOW SIDE
HS MINUS
SW
LOW SIDE
SW NODE
HS MINUS
SW
Figure 59. Output Drivers and SW Node Waveforms
22ns (
Figure 58. Soft Start and RES Detect Waveform
(C
Q
IN
TOTAL
B
= 4.3 nF (Upper-Side/Lower-Side MOSFET),
W
B
t
pdh
W
= 27 nC (V
DRVH
CH2 5A Ω
CH4 2V
CH2 5V
CH4 2V
CH2 5V
CH4 2V
)
GS
T
= 4.4 V (Q1), V
16ns (
A
= 25°C
M1ms
M40ns
M40ns
T
T
T
t
f
,DRVL
63.2%
29.0%
29.0%
25ns (
)
HIGH SIDE
GS
t
r
= 5 V (Q3))
,DRVH
A CH1
HIGH SIDE
SW NODE
A CH2
A CH2
)
T
A
= 25°C
4.20V
4.20V
1.56V
Rev. 0 | Page 16 of 40
Figure 61. Upper-Side Driver Falling and Lower-Side Rising Edge Waveforms
M
4
3
2
570
550
530
510
490
470
450
430
680
630
580
530
480
430
380
330
CH3 5V
MATH 2V 20ns
–40
T
2.7
A
HIGH SIDE
HS MINUS
SW
Figure 62. Transconductance (G
= 25°C
(C
Q
IN
TOTAL
3.0
–20
Figure 63. Transconductance (G
18ns (
= 4.3 nF (Upper-Side/Lower-Side MOSFET),
= 27 nC (V
3.3
t
r
,DRVL
CH2 5V
CH4 2V
0
3.6
)
TEMPERATURE (°C)
20
GS
= 4.4 V (Q1), V
11ns (
3.9
VREG (V)
24ns (
40
M20ns
T
t
f
,DRVH
4.2
39.2%
t
pdh
M
60
) vs. Temperature
)
,DRVL
4.5
GS
M
= 5 V (Q3))
) vs. V
)
80
A CH2
LOW SIDE
4.8
SW NODE
DD
V
V
V
REG
REG
REG
100
5.1
4.20V
+125°C
+25°C
–40°C
= 5.5V
= 3.6V
= 2.7V
120
5.4