参数资料
| 型号： | LT3015IDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 19/26页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO NEG ADJ 1.5A 8DFN |
| 产品培训模块： | LT3015 1.5A Low Noise Negative LDO |
| 标准包装： | 121 |
| 稳压器拓扑结构： | 负，可调式 |
| 输出电压： | -1.22 V ~ -29.5 V |
| 输入电压： | -1.8 V ~ -30 V |
| 电压 - 压降（标准）： | 0.31V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A |
| 电流 - 限制（最小）： | 1.7A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（3x3） |
| 包装： | 管件 |
LT3015 Series
APPLICATIONS INFORMATION
Table 2. Measured Thermal Resistance for DFN Package
Thus:
COPPER AREA
TOP SIDE* BACKSIDE
2500mm 2 2500mm 2
1000mm 2 2500mm 2
225mm 2 2500mm 2
100mm 2 2500mm 2
*Device is mounted on topside
BOARD
AREA
2500mm 2
2500mm 2
2500mm 2
2500mm 2
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
40°C/W
40°C/W
41°C/W
42°C/W
P = –500mA(–3.465V + 2.5V) + –6.5mA ? (–3.465V) =
0.505W
Using a DFN package, the thermal resistance is in the
range of 40°C/W to 42°C/W depending on the copper area.
Therefore, the junction temperature rise above ambient
approximately equals:
0.505W ? 41°C/W = 20.7°C
BOARD
THERMAL RESISTANCE
Table 3. Measured Thermal Resistance for MSOP Package
COPPER AREA
TOP SIDE* BACKSIDE AREA (JUNCTION-TO-AMBIENT)
The maximum junction temperature equals the maxi-
mum ambient temperature plus the maximum junction
temperature rise above ambient or:
2500mm 2
1000mm 2
225mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
2500mm 2
37°C/W
37°C/W
38°C/W
T JMAX = 85°C + 20.7°C = 105.7°C
Protection Features
BOARD
THERMAL RESISTANCE
100mm 2 2500mm 2 2500mm 2 40°C/W
*Device is mounted on topside
Table 4. Measured Thermal Resistance for DD-Pak Package
COPPER AREA
TOP SIDE* BACKSIDE AREA (JUNCTION-TO-AMBIENT)
2500mm 2 2500mm 2 2500mm 2 14°C/W
1000mm 2 2500mm 2 2500mm 2 16°C/W
225mm 2 2500mm 2 2500mm 2 19°C/W
*Device is mounted on topside
T Package, 5-Lead TO-220
Thermal Resistance (Junction-to-Case) = 3°C/W
Calculating Junction Temperature
Example: Given an output voltage of –2.5V, an input voltage
range of –3.3V ± 5%, an output current range of 1mA to
500mA, and a maximum ambient temperature of 85°C,
what is the maximum junction temperature?
The power dissipated by the LT3015 equals:
I OUT(MAX) ? (V IN(MAX) - V OUT ) + I GND ? (V IN(MAX) )
where:
I OUT(MAX) = –500mA
V IN(MAX) = –3.465V
I GND at (I OUT = –500mA, V IN = –3.465V) = –6.5mA
The LT3015 incorporates several protection features that
make it ideal for use in battery-powered applications. In
addition to the normal protection features associated
with monolithic regulators, such as current limiting and
thermal limiting, the device protects itself against reverse
input voltages and reverse output voltages.
Precision current limit and thermal overload protections
are intended to protect the LT3015 against current over-
load conditions at the output of the device. For normal
operation, do not allow the the junction temperature to
exceed 125°C.
Pulling the LT3015’s output above ground induces no
damage to the part. If IN is left open circuit or grounded,
OUT can be pulled above GND by 30V. In addition, OUT acts
like an open circuit, i.e. no current flows into the pin. If IN
is powered by a voltage source, OUT sinks the LT3105’s
short-circuit current and protects itself by thermal limiting.
In this case, grounding the SHDN pin turns off the device
and stops OUT from sinking the short-circuit current.
3015fb
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3015IMSE | 制造商:Linear Technology 功能描述:LDO NEG 1.5A 12MSOP 制造商:Linear Technology 功能描述:LDO, NEG, 1.5A, 12MSOP |
| LT3015IMSE#PBF | 功能描述:IC REG LDO NEG ADJ 1.5A 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:8V 输入电压:10.5 V ~ 23 V 电压 - 压降（标准）:1.7V @ 40mA 稳压器数量:1 电流 - 输出:100mA（最小值） 电流 - 限制（最小）:- 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:剪切带 (CT) 产品目录页面:1075 (CN2011-ZH PDF) 其它名称:296-24390-1 |
| LT3015IMSE#TRPBF | 功能描述:IC REG LDO NEG ADJ 1.5A 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT3015IMSE-12#PBF | 功能描述:IC REG LDO -12V 1.5A 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT3015IMSE-12#TRPBF | 功能描述:IC REG LDO -12V 1.5A 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
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