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| 型号： | LT1579IGN#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO SMART DUAL ADJ 16SSOP |
| 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-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
LT1579
300mA Dual Input Smart
Battery Backup Regulator
FEATURES
DESCRIPTIO N
s
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s
s
s
s
s
s
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Maintains Output Regulation with Dual Inputs
Dropout Voltage: 0.4V
Output Current: 300mA
50 μ A Quiescent Current
No Protection Diodes Needed
Two Low-Battery Comparators
Status Flags Aid Power Management
Adjustable Output from 1.5V to 20V
Fixed Output Voltages: 3V, 3.3V and 5V
7 μ A Quiescent Current in Shutdown
Reverse-Battery Protection
Reverse Current Protection
Remove, Recharge and Replace Batteries Without
Loss of Regulation Daisy-Chained Control Outputs
The LT ? 1579 is a dual input, single output, low dropout
regulator. This device is designed to provide an
uninterruptible output voltage from two independent input
voltage sources on a priority basis. All of the circuitry
needed to switch smoothly and automatically between
inputs is incorporated.
The LT1579 can supply 300mA of output current from
either input at a dropout voltage of 0.4V. Quiescent current
is 50 μ A, dropping to 7 μ A in shutdown. Two comparators
are included to monitor input voltage status. Two addi-
tional status flags indicate which input is supplying power
and provide an early warning against loss of output
regulation when both inputs are low. A secondary select
pin is provided so that the user can force the device to
switch from the primary input to the secondary input.
Dual Battery Systems
Battery Backup Systems
Automatic Power Management for
APPLICATIO N S
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Battery-Operated Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
Internal protection circuitry includes reverse-battery pro-
tection, current limiting, thermal limiting and reverse-
current protection.
The device is available in fixed output voltages of 3V, 3.3V
and 5V, and as an adjustable device with a 1.5V reference
voltage. The LT1579 regulators are available in narrow
16-lead SO and 16-lead SSOP packages with all features,
and in SO-8 with limited features.
TYPICAL APPLICATIO N
5V Dual Battery Supply
Automatic Input Switching
+
1 μ F
2.7M
IN1
LBI1
OUT
+
5V
300mA
4.7 μ F
12
10
8
V IN1
SWITCHOVER
POINT
V IN2 = 10V
I LOAD = 50mA
80
1M
LT1579-5
6
I IN1
I IN2
60
SS
4
40
+
1 μ F
2.7M
IN2
LBI2
SHDN
LBO1
LB02
TO
POWER
MANAGEMENT
2
0
5.05
20
0
1M
BACKUP
DROPOUT
BIASCOMP
5.00
4.95
GND
0.01 μ F
0
2
4
6
8
10 12 14 16 18 20
TIME (ms)
1579 TA01
1578 TA02
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1580 | 制造商:LINER 制造商全称:Linear Technology 功能描述:7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed |
| LT-1580-113-006 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1580-113-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT1580-2.5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:7A, Very Low Dropout Regulator |
| LT-1580-611-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
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