MAX16909 Datasheet, PDF (5/18 Pages) Maxim Integrated Products – 36V, 220kHz to 1MHz Step-Down Converter with Low Operating Current

MAX16909
36V, 220kHz to 1MHz Step-Down Converter
with Low Operating Current
Typical Operating Characteristics
(V_SUP = V_SUPSW = VEN = 14V, V_OUT = 1.8V, R1 = 80.6kΩ, R2 = 100kΩ, T_A = +25NC (Figure 4), unless otherwise noted.)
STARTUP INTO HEAVY LOAD
(1.8V/400kHz)
MAX16909 toc01
STARTUP INTO NO LOAD
(1.8V/400kHz)
MAX16909 toc02
VIN
VOUT
ILOAD
VPGOOD
0.6I RESISTIVE LOAD
5V/div
0V
1V/div
0V
2A/div
0A
5V/div
0V
VIN
VOUT
VPGOOD
5V/div
0V
1V/div
0V
5V/div
0V
2ms/div
2ms/div
EFFICIENCY vs. LOAD CURRENT
VIN = 14V
100
90
80
70
3.3V
5V 8V
60
1.8V
50
40
30
20 ^{DIODE: B360B-13-F FROM DIODES}
INDUCTOR: DRA125-150-R,
10 _{COOPER BUSSMANN}
0
0 0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. LOAD CURRENT
VIN = 14V
5V
3.3V
1.8V
8V
D1: B360B-13-F, DIODES
L1: DRA125-150-R,
COOPER BUSSMANN
0.0001 0.001
0.01
0.1
LOAD CURRENT (A)
SWITCHING FREQUENCY vs. RFOSC
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1 VIN = 14V
0
20 30 40 50 60 70 80 90 100 110
RFOSC (kI)
SWITCHING FREQUENCY vs. ILOAD
(1.8V/400kHz)
400
399
398
397
396
395
394
393
392
391 VIN = 14V
390
0
0.5 1.0 1.5 2.0 2.5 3.0
ILOAD (A)
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