Typical operating characteristics (continued) – Rainbow Electronics MAX8982X User Manual
Page 20
Power-Management ICs for
ICERA E400/E450 Platform
MAX8982A/MAX8982X
20
Typical Operating Characteristics (continued)
(MAX8982A: V
IN1A
= V
IN1B
= 5V, MAX8982X: V
IN1A
= V
IN1B
= V
DDA
= V
DDB
= V
IN4
= 3.3V, C
REFBP
= 0.1µF, T
A
= -40°C to +85°C,
Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at T
A
= +25°C.
Limits are 100% production tested at T
A
= +25NC,
unless otherwise noted. Limits over the temperature range are guaranteed by design.)
NO LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX8982X)
MAX8982A toc04
INPUT VOLTAGE (V)
5.0
4.5
4.0
3.5
3.0
5.5
SHUTDOWN CURRENT (uA)
120
140
160
180
200
220
240
260
280
300
100
OUT3 ON
ALL OTHER OUTPUTS OFF
BUCK1 LOAD REGULATION
MAX8982A toc05
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
700
200
0.825
0.850
0.875
0.900
0.925
0.950
0.800
0
1200
L = 2.2µH, HITACHI METALS LTD
KSLI-252012AG-2R2
DCR = 100mI
BUCK1 LOAD TRANSIENT
MAX8982A toc06
1.2A
1mA
AC-COUPLED
200mV/div
I
BUCK1
V
OUT
= 1V
C
OUT
= 10µF
V
BUCK1
100µs/div
BUCK1 EFFICIENCY
vs. LOAD CURRENT
MAX8982A toc07
LOAD CURRENT (mA)
EFFICIENCY (%)
100
10
40
50
60
70
80
90
100
30
1
1000
V
IN
= 5.5V
V
OUT
= 0.9V
V
IN
= 5V
V
IN
= 4.5V
V
IN
= 4.1V
BUCK1 SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX8982A toc08
LOAD CURRENT (mA)
SWITCHING FREQUENCY (MHz)
700
200
0.5
1.0
1.5
2.0
2.5
0
0
1200
BUCK1 SWITCHING FREQUENCY
vs. TEMPERATURE
MAX8982A toc09
TEMPERATURE (
°C)
SWITCHING FREQUENCY (MHz)
60
35
10
-15
1.800
1.850
1.900
1.950
2.000
2.050
2.100
2.150
2.200
1.750
-40
85