LT1934 LINER [Linear Technology], LT1934 Datasheet - Page 16

• Manufacturer Part Number: LT1934
• Description: Micropower Step-Down Switching Regulators in ThinSOT
• Manufacturer: LINER [Linear Technology]

LT1934/LT1934-1
16
TYPICAL APPLICATIO S
14V TO 32V
<3.6mA
Loop Powered 3.3V Supply with Additional Isolated Output
3.6V TO 16V
U
V
IN
ON OFF
1 F
V
IN
D1: ON SEMICONDUCTOR MBR0540
D2, D3: BAT54
D4: CENTRAL CMPZ5240B
L1: COILTRONICS CTX50-1
ZENER DIODE D4 PROVIDES AN UNDERVOLTAGE LOCKOUT,
REDUCING THE INPUT CURRENT REQUIRED AT START-UP
2.2 F
C2
390k
D4
10V
C1: SANYO 2R5TPB100M
C2: TAIYO YUDEN EMK316BJ225ML
D1: ZETEX ZHCS400 OR ON SEMI MBR0540
D2: CENTRAL CMPD914
L1: SUMIDA CR43-330
1.8V Step-Down Converter
V
SHDN
IN
V
SHDN
D2
LT1934-1
IN
BOOST
GND
LT1934
BOOST
GND
SW
FB
SW
FB
C1
•
D1
D1
50 H
50 H
L1B
L1A
D3
0.1 F
•
715k
+
1M
33 H
147k
332k
L1
D2
10 F
ISOLATED
OUT
3V
3mA
+
10pF
+
1934 TA06
C1
100 F
V
1.8V
250mA
1934 TA08
OUT
33 F
V
3V
9mA
OUT
1934f