MAX16929 Datasheet, PDF (6/25 Pages) Maxim Integrated Products – Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators

MAX16929
Automotive TFT-LCD Power Supply with Boost
Converter and Gate Voltage Regulators
Typical Operating Characteristics
(V_INA = 5V, V_INB = 12V, measurements taken on “A” version, unless otherwise noted; V_SH = 12V, V_GH = 18V, V_GL = -6V, V_REG = 3.3V,
V_OUTB = 5V, T_A = +25NC, unless otherwise noted.)
SHUTDOWN SUPPLY CURRENT (BUCK)
20
18
16
14
12
10
8
6
4
2
0
4 8 12 16 20 24 28
SUPPLY VOLTAGE (V)
EFFICIENCY vs. LOAD CURRENT (BUCK)
100
90
80
70
VINB =12V _{VINB =18V}
VINB = 28V
60
50
40
30
20
10
0
0
0.4 0.8 1.2 1.6 2.0
LOAD CURRENT (A)
LINE REGULATION (BUCK)
4.0
3.2
2.4
IOUTB = 0A
1.6
0.8 I_OUTB = 1A
0
-0.8
-1.6
IOUTB = 2A
-2.4
-3.2
-4.0
4 6 8 10 12 14 16 18 20 22 24 26 28
INPUT VOLTAGE (V)
LOAD REGULATION (BUCK)
6
5
4
3
2
VINB = 12V
1
0
-1
VINB = 18V
-2
VINB = 28V
-3
-4
-5
-6
0
0.4 0.8 1.2 1.6 2.0
LOAD CURRENT (A)
STARTUP WAVEFORMS (BUCK)
MAX16929 toc05
VENB
5V/div
I_LXB
2A /div
LOAD-TRANSIENT RESPONSE (BUCK)
MAX16929 toc06
1.8A
IOUTB
1A/div
0.2A
V_OUTB
2V/div
V_OUTB
(AC-COUPLED)
100mV/div
1ms/div
400µs/div
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