MAX16903 Datasheet, PDF (5/13 Pages) Maxim Integrated Products – 2.1MHz, High-Voltage, 1A Mini-Buck Converter Thermal Shutdown Protection

2.1MHz, High-Voltage, 1A Mini-Buck Converter
(V_SUP = +14V, T_A = +25°C, unless otherwise noted.)
Typical Operating Characteristics
EFFICIENCY vs. LOAD CURRENT
(5V VERSION)
100
90
SKIP MODE
80
70
FFF MODE
60
50
40
30
20
10
0
0.00001 0.0001 0.001 0.01 0.1
1
I_LOAD (A)
LOAD REGULATION
4
3
SKIP MODE
2
1
0
-1
FFF MODE
-2
-3
-4
0
0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
SHUTDOWN WAVEFORM (I_LOAD = 1A)
MAX16903 toc07
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (SKIP MODE)
60
50
40
5V PART
30
20
3.3V PART
10
0
6 8 10 12 14 16 18 20 22 24 26 28
INPUT VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
15
LINE REGULATION
(I_LOAD = 1A)
4
3
2
1
0
-1
-2
-3
-4
6 8 10 12 14 16 18 20 22 24 26 28
INPUT VOLTAGE (V)
STARTUP WAVEFORM (I_LOAD = 1A)
MAX16903 toc06
12
9
6
3
0
6 8 10 12 14 16 18 20 22 24 26 28
INPUT VOLTAGE (V)
1ms/div
LOAD-TRANSIENT RESPONSE
(FIXED MODE)
MAX16903 toc08
EN
5V/div
I_INDUCTOR
1A/div
PGOOD
5V/div
V_OUT
5V/div
EN
5V/div
I_LOAD
1A/div
20µs/div
I_INDUCTOR
1A/div
PGOOD
5V/div
V_OUT
5V/div
V_OUT
5V
200mV/div
AC
COUPLED
5V
PGOOD
5V/div
I_LOAD = 100mA TO 1A TO 100mA
200µs/div
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