AMS2942AS Просмотр технического описания (PDF) - Advanced Monolithic Systems Inc
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AMS2942AS Datasheet PDF : 7 Pages
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APPLICATION HINTS (Continued)
OUTPUT
VOLTAGE
4.75V
ERROR*
INPUT
VOLTAGE
5V
1.3V
AMS2942
+VIN
ERROR
OUPUT
100k
8
+VIN
5 ERROR*
VOUT 1
**SHUTDOWN
INPUT
AMS2942
4 SD
GND FB
3 2 7 1.23
V
VREF
VOUT
1.2 30V
R1
*+
.01µ
3.3µF
F
R2
FIGURE 1. ERROR Output Timing
*When VIN 1.3V the error flag pin becomes a high impedance,
and the error flag voltage rises to its pull-up voltage. Using Vout
as the pull-up voltage (see Figure 2), rather than an external 5V
source, will keep the error flag voltage under 1.2V (typ.) in this
condition. The user may wish to drive down the error flag
voltage using equal value resistors (10 k suggested), to ensure
a low-level logic signal during any fault condition, while still
allowing a valid high logic level during normal operation.
FIGURE 2. Adjustable Regulator
*See Application Hints.
Vout = VREF × (1 + R1/ R2)
**Drive with TTL- high to shut down. Ground or leave if shutdown
feature is not used.
Note: Pins 2 and 6 are left open.
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
8 LEAD SOIC PLASTIC PACKAGE (S)
0.189-0.197*
(4.801-5.004)
87 65
0.228-0.244
(5.791-6.197)
0.150-0.157**
(3.810-3.988)
12 34
0.053-0.069
(1.346-1.752)
0.004-0.010
(0.101-0.254)
0.010-0.020
(0.254-0.508)
x 45°
0.008-0.010
(0.203-0.254)
0.014-0.019
(0.355-0.483)
0.050
(1.270)
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
0.016-0.050
(0.406-1.270)
0°-8° TYP
S (SO-8 ) AMS DRW# 042293
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
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