Datasheet

Data Sheet AD5737
Rev. C | Page 17 of 44
0
5
10
15
20
25
30
OUTPUT CURRENT (mA)
–0.25 0 0.25 0.50 0.75 1.00 1.25 1.50 1.75
TIME (ms)
T
A
= –40°C
T
A
= +25°C
T
A
= +105°C
0mA TO 24mA RANGE
1kΩ LOAD
f
SW
= 410kHz
INDUCTOR = 10µH (XAL4040-103)
AV
CC
= 5V
10067-168
Figure 26. Output Current Settling Time with DC-to-DC Converter
over Temperature (See Figure 55)
0
5
10
15
20
25
30
OUTPUT CURRENT (mA)
–0.25 0 0.25 0.50 0.75 1.00 1.25 1.50 1.75
TIME (ms)
AV
CC
= 4.5V
AV
CC
= 5.0V
AV
CC
= 5.5V
0mA TO 24mA RANGE
1kΩ LOAD
f
SW
= 410kHz
INDUCTOR = 10µH (XAL4040-103)
T
A
= 25°C
10067-169
Figure 27. Output Current Settling Time with DC-to-DC Converter
over AV
CC
(See Figure 55)
0
5
10
15
20
25
–5 50 10 15 20
OUTPUT CURRENT (mA)
TIME (µs)
10067-189
I
OUT
(4mA TO 20mA STEP)
I
OUT
(20mA TO 4mA STEP)
T
A
= 25°C
EXTERNAL PMOS (NTLJS4149)
4mA TO 20mA RANGE
R
LOAD
= 300Ω
V
BOOST_x
= 24V
Figure 28. Output Current Settling Time with External PMOS Transistor
–10
–8
–6
–4
–2
0
2
4
6
8
10
0 2 4 6 8 10 12 14
CURRENT (AC-COUPLED) (µA)
TIME (µs)
AV
CC
= 5V
f
SW
= 410kHz
INDUCTOR = 10µH (XAL4040-103)
0mA TO 24mA RANGE
1kΩ LOAD
EXTERNAL R
SET
T
A
= 25°C
20mA OUTPUT
10mA OUTPUT
10067-170
Figure 29. Output Current, AC-Coupled vs. Time
with DC-to-DC Converter (See Figure 55)
8
7
6
5
4
3
2
1
0
0 5 10 15 20
HEADROOM VOLTAGE (V)
OUTPUT CURRENT (mA)
0mA TO 24mA RANGE
1kΩ LOAD
f
SW
= 410kHz
INDUCTOR = 10µH (XAL4040-103)
T
A
= 25°C
10067-067
Figure 30. DC-to-DC Converter Headroom vs. Output Current (See Figure 55)
0
–120
–100
–80
–60
–40
–20
10 100 1k 10k 100k 1M 10M
I
OUT_x
PSRR (dB)
FREQUENCY (Hz)
AV
DD
= 15V
V
BOOST_x
= 15V
T
A
= 25°C
10067-068
Figure 31. I
OUT_x
PSRR vs. Frequency