LTC1514-3.3 Datasheet, PDF (8/8 Pages) Linear Technology – Step-Up/Step-Down Switched Capacitor DC/DC Converters with Low-Battery Comparator

LTC1514-3.3/LTC1514-5
TYPICAL APPLICATIONS N
Low Power Dual Output Supply (Maximum Combined I_OUT = 50mA)
ON OFF
V_OUT
3.3V
± 4%
+
10µF
10Ω
Q2 220k
Q1
750k
1%
402k
1%
47k
2.2nF
1
SHDN
8
V_OUT
2
LBO
7
V_IN
3 _LBI ^LTC1514-5 _C1+ 6
4
GND
C1^{– 5}
+
0.22µF
+
22µF
V_OUT
5V ±4%
V_IN
2.7V TO 10V
10µF
Q1: TP0610T
Q2: MMBT3906LT1
1514 TA04
Step-Up/Step-Down Power Supply with Input Autoswitching
WALL
ADAPTER
+6VDC
MMBD
914LT1
Si6943DQ
CENTRAL SEMI
CMPD6263C
Si6943DQ
Si6943DQ
2.4k
100k
4 × AAA
ALKALINE
MMBZ
CELLS
5235BLT1
470k
(6.8V)
10k
10k _{+ 10µF}
25V
1
7
V_IN
8
SHDN
V_OUT
3 _{LBI LTC1514-5 C1+} 6
1k
1M
2N7002
2
LBO
GND
C1^{– 5}
MMBT
4
3904LT1
MMBT
3904LT1
EXT_PWR_GOOD
+
0.22µF
22µF
10V
V_OUT
5V
50mA
1514 TA07
ON OFF
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.053 – 0.069
(1.346 – 1.752)
0°– 8° TYP
0.004 – 0.010
(0.101 – 0.254)
0.189 – 0.197*
(4.801 – 5.004)
8
7
6
5
0.016 – 0.050
0.406 – 1.270
0.014 – 0.019
(0.355 – 0.483)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.050
(1.270)
TYP
0.228 – 0.244
(5.791 – 6.197)
1
2
34
0.150 – 0.157**
(3.810 – 3.988)
SO8 0996
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8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417^q [phone]
FAX: [phone]^q TELEX: 499-3977 ^q www.linear-tech.com
151435f LT/TP 0298 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1997