Datasheet

MAX16932/MAX16933
2.2MHz, 36V, Dual Buck
with 20µA Quiescent Current
5Maxim Integrated
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
NO LOAD STARTUP SEQUENCE
(V
FSYNC
= 0V)
MAX16932 toc01
V
BAT
5V/div
V
OUT1
2V/div
V
OUT2
2V/div
V
PGOOD1
5V/div
V
PGOOD2
5V/div
2ms/div
QUIESCIENT CURRENT
vs. TEMPERATURE
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
0 20 40 60 80 100 120 140
-20
20
10
50
40
30
60
0
-60 -40
MAX16932 toc03
V
EN1
= V
BAT
V
EN2
= 0V
EXTVCC = V
OUT1
V
EN1
= 0V
V
EN2
= V
BAT
EXTVCC = V
OUT2
BUCK1 EFFICIENCY
MAX16932 toc05
I
OUT1
(A)
1.0E+001.0E-021.0E-04
10
20
30
40
50
60
70
80
90
100
0
1.0E-06
1.0E-011.0E-031.0E-05 1.0E+01
f
SW
= 2.2MHz
L = 2.2µH
V
BAT
= 14V
V
OUT1
= 5V
SKIP MODE
EXTVCC = V
OUT1
EXTVCC
= GND
EXTVCC
= V
OUT2
EXTVCC
= GND
PWM MODE
EFFICIENCY (%)
FULL LOAD STARTUP SEQUENCE
(V
FSYNC
= 0V)
MAX16932 toc02
V
BAT
5V/div
V
OUT1
2V/div
V
OUT2
2V/div
I
OUT1
2A/div
I
OUT2
2A/div
V
PGOOD1
5V/div
V
PGOOD2
5V/div
4ms/div
QUIESCIENT CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
15 20 25 30 35 40
10
20
10
70
60
50
40
30
80
0
0 5
MAX16932 toc04
BUCK 1
EXTVCC = V
OUT1
BUCK 2
EXTVCC = V
OUT2
BUCK2 EFFICIENCY
MAX16932 toc06
I
OUT2
(A)
EFFICIENCY (%)
1.0E+001.0E-021.0E-04
10
20
30
40
50
60
70
80
90
100
0
1.0E-06
1.0E-011.0E-031.0E-05 1.0E+01
f
SW
= 2.2MHz
L = 2.2µH
V
BAT
= 14V
V
OUT2
= 3.3V
SKIP MODE
PWM MODE
EXTVCC = V
OUT2
EXTVCC
= GND
EXTVCC
= V
OUT2
EXTVCC
= GND