參數(shù)資料
型號(hào)： LT1579CGN-3.3
廠商： LINEAR TECHNOLOGY CORP
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 300mA Dual Input Smart Battery Backup Regulator
中文描述： 3.3 V FIXED POSITIVE LDO REGULATOR, 0.75 V DROPOUT, PDSO16
封裝： 0.150 INCH, PLASTIC, SSOP-16
文件頁(yè)數(shù)： 1/20頁(yè)
文件大小： 352K
代理商： LT1579CGN-3.3
1
LT1579
300mA Dual Input Smart
Battery Backup Regulator
Daisy-Chained Control Outputs
FEATURES
I
Maintains Output Regulation with Dual Inputs
I
Dropout Voltage: 0.4V
I
Output Current: 300mA
I
50
μ
A Quiescent Current
I
No Protection Diodes Needed
I
Two Low-Battery Comparators
I
Status Flags Aid Power Management
I
Adjustable Output from 1.5V to 20V
I
Fixed Output Voltages: 3V, 3.3V and 5V
I
7
μ
A Quiescent Current in Shutdown
I
Reverse-Battery Protection
I
Reverse Current Protection
I
Remove, Recharge and Replace Batteries Without
Loss of Regulation
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.
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.
DESCRIPTIO
N
U
5V Dual Battery Supply
Automatic Input Switching
2.7M
1M
2.7M
1M
+
1
μ
F
+
1
μ
F
+
4.7
μ
F
5V
300mA
TO
POWER
MANAGEMENT
0.01
μ
F
IN1
OUT
SS
SHDN
LBO1
LB02
BACKUP
DROPOUT
BIASCOMP
GND
LBI1
IN2
LBI2
LT1579-5
1579 TA01
TIME (ms)
0
I
O
4
8
12
16
1578 TA02
0
5.00
2
6
I
40
80
0
20
60
10
5.05
4.95
4
8
12
2
18
6
10
14
20
V
IN2
= 10V
I
LOAD
= 50mA
SWITCHOVER
POINT
V
IN1
I
IN1
I
IN2
APPLICATIO
S
U
I
Dual Battery Systems
I
Battery Backup Systems
I
Automatic Power Management for
Battery-Operated Systems
TYPICAL APPLICATIO
N
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
相關(guān)PDF資料
PDF描述
LT1579CGN-5 300mA Dual Input Smart Battery Backup Regulator
LT1579 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1580C Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1580-2.5 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1580CR-2.5 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1579CGN-5 功能描述:IC LDO REG SMART DUAL 5V 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:Impedance Track™ 功能:燃料，電量檢測(cè)計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.4 V ~ 2.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:帶卷 (TR) 產(chǎn)品目錄頁(yè)面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名稱:296-21665-2
LT1579CGN-5#PBF 功能描述:IC LDO REG SMART DUAL 5V 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:Impedance Track™ 功能:燃料，電量檢測(cè)計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.4 V ~ 2.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:帶卷 (TR) 產(chǎn)品目錄頁(yè)面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名稱:296-21665-2
LT1579CGN-5#TR 功能描述:IC REG LDO SMART DUAL 5V 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
LT1579CGN-5#TRPBF 功能描述:IC LDO REG SMART DUAL 5V 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT
LT1579CS 功能描述:IC LDO REG SMART DUAL ADJ 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
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