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| 型号： | LT1579CGN |
| 厂商： | Linear Technology |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC LDO REG SMART DUAL ADJ 16SSOP |
| 标准包装： | 100 |
| 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： | 管件 |
| 产品目录页面： | 1328 (CN2011-ZH PDF) |
LT1579
ELECTRICAL CHARACTERISTICS
PARAMETER
Adjust Pin Bias Current
CONDITIONS
T J = 25 ° C
MIN
TYP
6
MAX
30
UNITS
nA
(Notes 2, 7)
Minimum Input Voltage
I LOAD = 0mA
q
2.7
3.2
V
(Note 8)
Minimum Load Current
LT1579
V IN1 = V IN2 = 3.2V
q
3
μ A
Secondary Select
Switch from V IN2 to V IN1
q
1.2
2.8
V
Threshold
Switch from V IN1 to V IN2
q
0.25
0.75
V
Secondary Select Pin
V SS = 0V
q
1
1.5
μ A
Current (Note 7)
Low-Battery Trip Threshold
Low-Battery Comparator
V IN1 = V IN2 = V OUT(NOMINAL) + 1V, High-to-Low Transition
V IN1 = V IN2 = 6V, I LBO = 20 μ A (Note 11)
q
q
1.440
1.500
18
1.550
30
V
mV
Hysteresis
Low-Battery Comparator
V IN1 = V IN2 = 6V, V LBI = 1.4V, T J = 25 ° C
2
5
nA
Bias Current (Notes 7, 10)
Logic Flag Output Voltage
Ripple Rejection
I SINK = 20 μ A
I SINK = 5mA
V IN1 – V OUT = V IN2 – V OUT = 1.2V (Avg), V RIPPLE = 0.5V P-P
q
q
55
0.17
0.97
70
0.45
1.3
V
V
dB
f RIPPLE = 120Hz, I LOAD = 150mA
Current Limit
Input Reverse Leakage
V IN1 = V IN2 = V OUT(NOMINAL) + 1V, ? V OUT = – 0.1V
V IN1 = V IN2 = –20V, V OUT = 0V
q
q
320
400
1.0
mA
mA
Current
Reverse Output Current
LT1579-3 V OUT = 3V, V IN1 = V IN2 = 0V
LT1579-3.3 V OUT = 3.3V, V IN1 = V IN2 = 0V
LT1579-5 V OUT = 5V, V IN1 = V IN2 = 0V
3
3
3
12
12
12
μ A
μ A
μ A
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, output current must be limited.
When operating at maximum output current, the input voltage range must
be limited.
Note 2: The LT1579 (adjustable version) is tested and specified with the
adjust pin connected to the output pin and a 3 μ A DC load.
Note 3: Dropout voltage is the minimum input-to-output voltage
differential required to maintain regulation at the specified output current.
In dropout, the output voltage will be equal to V IN – V DROPOUT .
Note 4: To meet the requirements for minimum input voltage, the LT1579
(adjustable version) is connected with an external resistor divider for a
3.3V output voltage (see curve of Minimum Input Voltage vs Temperature
in the Typical Performance Characteristics). For this configuration,
V OUT(NOMINAL) = 3.3V.
Note 5: Ground pin current will rise at T J > 75 ° C. This is due to internal
circuitry designed to compensate for leakage currents in the output
transistor at high temperatures. This allows quiescent current to be
minimized at lower temperatures, yet maintain output regulation at high
temperatures with light loads. See the curve of Quiescent Current vs
Temperature in the Typical Performance Characteristics.
4
Note 6: Standby current is the minimum quiescent current for a given
input while the other input supplies the load and bias currents.
Note 7: Current flow is out of the pin.
Note 8: Minimum input voltage is the voltage required on either input to
maintain the 1.5V reference for the error amplifier and low-battery
comparators.
Note 9: Total quiescent current in shutdown will be approximately equal to
I VIN1 + I VIN2 – I SRC . Both I VIN1 and I VIN2 are specified for worst-case
conditions. I VIN1 is specified under the condition that V IN1 > V IN2 and I VIN2
is specified under the condition that V IN2 > V IN1 . I SRC is drawn from the
highest input voltage only. For normal operating conditions, the quiescent
current of the input with the lowest input voltage will be equal to the
specified quiescent current minus I SRC . For example, if V IN1 = 20V, V IN2 =
6V then I VIN1 = 5 μ A and I VIN2 = 5 μ A – 3 μ A = 2 μ A.
Note 10: The specification applies to both inputs independently
(LBI1, LBI2).
Note 11: Low-battery comparator hysteresis will change as a function of
current in the low-battery comparator output. See the curve of Low-Battery
Comparator Hysteresis vs Sink Current in the Typical Performance
Characteristics.
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| LT1579CGN#PBF | 功能描述:IC LDO REG SMART DUAL ADJ 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:2,000 系列:Impedance Track™ 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.4 V ~ 2.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:带卷 (TR) 产品目录页面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名称:296-21665-2 |
| LT1579CGN#TR | 功能描述:IC REG LDO SMART DUAL ADJ 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1579CGN#TRPBF | 功能描述:IC LDO REG SMART DUAL ADJ 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
| LT1579CGN-3 | 功能描述:IC LDO REG SMART DUAL 3V 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:2,000 系列:Impedance Track™ 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.4 V ~ 2.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:带卷 (TR) 产品目录页面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名称:296-21665-2 |
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