Datasheet

MAX16993 Step-Down Controller with
Dual 2.1MHz Step-Down DC-DC Converters
Maxim Integrated │ 6
www.maximintegrated.com
Typical Operating Characteristics
(V
SUP
= 14V, T
A
= +25°C, unless otherwise noted)
BUCK 2 LOAD REGULATION (PWM MODE)
MAX16993 toc09
I
OUT2
(A)
V
OUT2
(V)
1.41.20.8 1.00.4 0.60.2
3.09
3.10
3.11
3.12
3.13
3.14
3.15
3.16
3.17
3.18
3.19
3.08
0 1.6
T
A
= +125ºC
T
A
= +25ºC
T
A
= -40ºC
V
PV2
= 5.0V, I
MAX
= 1.5A, V
OUT2
= 3.15V
BUCK 2 EFFICIENCY
MAX16993 toc08
I
OUT3
(A)
EFFICIENCY (%)
1.00E-021.00E-04
10
20
30
40
50
60
70
80
90
100
0
1.00E-06 1.00E+00
SKIP MODE
PWM MODE
f
SW
= 2.1MHz,
V
SUP
= 14V,
V
PV2
= 5.0V,
V
OUT2
= 3.15V
V
OUT1
vs. TEMPERATURE
MAX16993 toc07
TEMPERATURE (ºC)
V
OUT1
(V)
100500
4.985
4.990
4.995
5.000
5.005
5.010
5.015
5.020
5.025
5.030
4.980
-50 150
I
OUT1
= 3.75A
BUCK 1 LINE REGULATION (SKIP MODE)
MAX16993 toc06
V
SUP
(V)
V
OUT1
(% NOMINAL)
35305 10 15 20 25
99.7
99.9
100.1
100.3
100.5
100.7
100.9
99.5
0 40
V
OUT1
= 3.3V
BUCK 1 LINE REGULATION (SKIP MODE)
MAX16993 toc05
V
SUP
(V)
V
OUT1
(% NOMINAL)
353020 2510 155
99.2
99.4
99.6
99.8
100.0
100.2
100.4
100.6
100.8
101.0
99.0
0 40
V
OUT1
= 5.0V
BUCK 1 LINE REGULATION (PWM MODE)
MAX16993 toc04
V
SUP
(V)
V
OUT1
(% NOMINAL)
353020 2510 155
99.6
99.7
99.8
99.9
100.0
100.1
100.2
100.3
100.4
100.5
99.5
0 40
V
OUT1
= 5.0V
T
A
= +125ºC
T
A
= +25ºC
T
A
= -40ºC
BUCK 1 LOAD REGULATION (SKIP)
MAX16993 toc03
I
OUT1
(A)
V
OUT1
(V)
54321
4.92
4.94
4.96
4.98
5.00
5.02
5.04
5.06
5.08
5.10
4.90
0 6
T
A
= +125ºC
T
A
= +25ºC
T
A
= -40ºC
BUCK 1 LOAD REGULATION (PWM)
MAX16993 toc02
I
OUT1
(A)
V
OUT1
(V)
541 2 3
4.995
5.000
5.005
5.010
5.015
5.020
5.025
5.030
4.990
0 6
T
A
= +125ºC
T
A
= +25ºC
T
A
= -40ºC
BUCK 1 EFFICIENCY
MAX16993 toc01
I
OUT1
(A)
EFFICIENCY (%)
1.00E-021.00E-04
10
20
30
40
50
60
70
80
90
100
0
1.00E-06 1.00E+00
SKIP MODE
PWM MODE