Max1790 low-noise step-up dc-dc converter – Rainbow Electronics MAX1790 User Manual
Page 11
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MAX1790
Low-Noise Step-Up DC-DC Converter
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11
Figure 4. Multiple-Output, Low-Profile (1.2mm max) TFT LCD Power Supply
FB
LX
GND
18pF
27nF
C1, C2, C3, C4: TAIYO YUDEN LMK325BJ335MD (3.3
µF, 10V)
D1: ZETEX ZHCS1000 (20V, 1A, SCHOTTKY) OR MOTOROLA MBRM120ET3
D2, D3, D4: ZETEX BAT54S (30V, 200mA, SCHOTTKY)
L1: SUMIDA CLQ4D10-6R8 (6.8
µH, 0.8A) OR SUMITOMO CXLM120-6R8
274k
44.2k
FREQ
IN
3.0V TO 3.6V
V2
+26V
5mA
V1
9V
150mA
V3
-9V
10mA
COMP
SHDN
SS
D1
D2
D3
D4
0.47
µF
1
µF
1
µF
1
µF
0.1
µF
0.1
µF
MAX1790
470pF
150k
C1
C3
C2
3.3
µF
C4
L1
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