LTC1574_1 查看數據表（PDF） - Linear Technology
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LTC1574_1 Datasheet PDF : 8 Pages
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LTC1574
LTC1574-3.3/LTC1574-5
APPLICATIO S I FOR ATIO
on no-load supply current. Schottky diodes such as
MBR0530, BAS85 and BAT84 work well. Another more
serious effect of the protection diode leakage is that at no
load with nothing to provide a sink for this leakage
current, the output voltage can potentially float above the
maximum allowable tolerance. To prevent this from
occuring, a resistor must be connected between VOUT
and ground with a value low enough to sink the maximum
possible leakage current.
TYPICAL APPLICATIO S
Low Noise, High Efficiency 3.3V Regulator
VIN
4V TO 12.5V
5
6 IPGM
12 LBIN
VIN
SHDN 7
LTC1574 VFB 10
11 LBOUT
SW 3, 14
GND
2, 4, 13, 15
* AVX TPSD226K025
** AVX TPSD107K010
† COILTRONICS CTX50-4
+ 22µF*
25V
×2
0.1µF
50µH†
100pF
6.8nF
+ 100µF** 56k
10V
×2
33k
VOUT
3.3V
450mA
1574 TA03
PACKAGE DESCRIPTIO Dimension in inches (millimeters) unless otherwise noted.
S Package
16-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0° – 8° TYP
0.016 – 0.050
(0.406 – 1.270)
0.014 – 0.019
(0.355 – 0.483)
TYP
*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)
BSC
0.004 – 0.010
(0.101 – 0.254)
0.386 – 0.394*
(9.804 – 10.008)
16 15 14 13 12 11 10 9
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157**
(3.810 – 3.988)
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S16 1098
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.
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