参数资料
型号: LT1579CS#TR
厂商: Linear Technology
文件页数: 11/20页
文件大小: 0K
描述: IC REG LDO SMRT DUAL ADJ 16SOIC
标准包装: 2,500
功能: 备份管理
电池化学: 智能电池
工作温度: 0°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 带卷 (TR)
LT1579
PI N FU N CTIO N S
LBO1: This is the open collector output of the low-battery
comparator LB1. This output pulls low when the com-
parator input drops below the threshold voltage. The
LBO1 output voltage is 1V when sinking 5mA, dropping
to under 200mV at 20 μ A (see curve of Logic Flag Voltage
vs Current in the Typical Performance Characteristics).
This makes the LBO1 pin equally useful in driving both
bipolar and CMOS logic inputs with the addition of an
external pull-up resistor. It is also capable of driving
higher current devices, such as LEDs. This pin is inter-
nally clamped to 7V and – 0.6V (one V BE ). If unused, this
pin can be left open circuit. Device operation is unaffected
if this pin is not connected.
LBO2: This is the open collector output of the low-battery
comparator LB2. This output pulls low when the com-
parator input drops below the threshold voltage. The
LBO2 output voltage is 1V when sinking 5mA, dropping
to under 200mV at 20 μ A (see curve of Logic Flag Voltage
vs Current in the Typical Performance Characteristics).
This makes the LBO2 pin equally useful in driving both
bipolar and CMOS logic inputs with the addition of an
external pull-up resistor. It is also capable of driving
higher current devices, such as LEDs. This pin is
internally clamped to 7V and – 0.6V (one V BE ). If unused,
this pin can be left open circuit. Device operation is
unaffected if this pin is not connected.
BLOCK DIAGRA M
V IN1
V IN2
V OUT
DROPOUT
DETECT
SHDN
BIAS CURRENT
CONTROL
INTERNAL
RESISTOR DIVIDER
FOR FIXED VOLTAGE
SS
DEVICES ONLY
ADJ
BIASCOMP
1.5V REFERENCE
OUTPUT DRIVER
CONTROL
E/A
+
LBI1
+
LB1
WARNING
FLAGS
BACKUP
DROPOUT
LBO1
LBI2
+
LB2
LBO2
1579 ? BD
11
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