Datasheet

LT1934/LT1934-1
18
1934fe
BOOST
V
IN
LT1934
SHDN
1934 TA07a
C2
1μF
D3
0.1μF
C1: SANYO 6TPB47M [phone]
C2: TAIYO YUDEN GMK316BJ105ML [phone]
D1, D3: ON SEMICONDUCTOR MBR0540 [phone]
D2: CENTRAL CMDSH-3 [phone]
L1: SUMIDA CR43-470 [phone]
D2
332k
1M
1k
1k 10k
L1
47μH
D1
V
IN
7V TO 28V
SW
FB
GND
V
IN
CHRG
LTC4052
ACPR
GATE
SENSE
BAT
350mA
1-CELL 4.2V
Li-Ion
BATTERY
GNDTIMER
C1
47μF
CHARGE STATUS
AC PRESENT
+
C5
10μF
+
0.047μF
C
TIMER
0.1μF
0.022μF
BATTERY VOLTAGE (V)
2.5
CHARGE CURRENT (mA)
200
300
4.5
1934 TA07b
100
0
3
3.5
4
500
400
V
IN
= 12V
V
IN
= 8V
V
IN
= 24V
TYPICAL APPLICATIONS
Standalone 350mA Li-Ion Battery Charger
12V Step-Down Converter
BOOST
V
IN
LT1934
SHDN
1934 TA09
C2
2.2μF
0.1μF
C1: KEMET T495D226K020AS
C2: TAIYO YUDEN GMK325BJ225MN
D1: ON SEMI MBR0540
D2, D4: CENTRAL CMPD914
D3: CENTRAL CMPZ5234B 6.2V ZENER
L1: TDK SLF6028T-101MR42
V
OUT
12V
170mA
D4
100k
866k
L1
100μH
D1
V
IN
15V TO 32V
ON OFF
SW
FB
GND
D2
D3
C1
22μF
+