LTC1574-3.3 LINER [Linear Technology], LTC1574-3.3 Datasheet - Page 7

• Manufacturer Part Number: LTC1574-3.3
• Description: High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
** AVX TPSD476K016
*** AVX TPSD107K010
** AVX TPSD106K035
* LOW-BATTERY INDICATOR IS
†
* LOW-BATTERY INDICATOR IS
†
SET UP TO TRIP AT V
MANUFACTURER
COILTRONICS
SUMIDA
GOWANDA
SELECTION
SET TO TRIP AT V
MANUFACTURER PART NO.
COILTRONICS
COILCRAFT
SUMIDA
GOWANDA
SELECTION
PART NO.
CTX100-4
CD75-101
GA10-103K
CTX50-3
DT3316-473 SURFACE MOUNT
CD54-470
GA10-472K THROUGH HOLE
IN
IN
= 4.4V
= 5.5V
TYPE
SURFACE MOUNT
SURFACE MOUNT
TYPE
SURFACE MOUNT
SURFACE MOUNT
THROUGH HOLE
4V TO 12.5V
** AVX TPSD476K016
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Low Dropout 5V Step-Down Regulator with Low-Battery Detection
* AVX TPSD226K025
†
COILTRONICS CTX50-4
U
V
IN
INDICATOR
280k
43k
INDICATOR
162k
47.5k
BATTERY
BATTERY
12
11
*LOW-
6
*LOW-
I
LB
LB
High Efficiency 3.3V Regulator
PGM
IN
OUT
Positive to –5V Converter
LTC1574-3.3
4.7k
4.7k
GND
V
IN
5
2, 4, 13, 15
11
12
11
12
6
SHDN
6
V
I
LB
LB
OUT
SW
PGM
I
LB
LB
PGM
OUT
IN
OUT
IN
7
10
3, 14
4V TO 12.5V
5.5V to 12.5V
LTC1574-5
LTC1574-5
GND
V
V
GND
V
V
IN
IN
IN
IN
5
2, 4, 13, 15
5
2, 4, 13, 15
+
50 H
SHDN
V
SHDN
V
OUT
SW
†
22 F*
25V
OUT
SW
2
LTC1574-3.3/LTC1574-5
7
10
3, 14
7
10
3, 14
+
0.1 F
47 F*
16V
50 H
L1
100 H
2
†
L1
0.1 F
†
0.1 F
V
3.3V
425mA
1574 TA05
OUT
+
+
+
+
100 F***
10V
10 F**
35V
2
47 F**
16V
47 F**
16V
2
2
V
V
–5V
12.5
OUT
IN
10
4
6
8
V
5V
365mA
LTC1574
(V) I
1574 TA04
OUT
OUT
110
140
170
200
235
1574 TA06
(mA)
7