参数资料
| 型号： | ISL78301FVEAZ |
| 厂商： | Intersil |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .15A 14HTSSOP |
| 标准包装： | 98 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 6 V ~ 40 V |
| 电压 - 压降（标准）： | 0.38V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA（最小） |
| 电流 - 限制（最小）： | 175mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP （0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 14-HTSSOP |
| 包装： | 管件 |
ISL78301
V OUT = 1.223V × ? ?
? R 1 ?
? R 2
Functional Description
Functional Overview
The ISL78301 is a high performance, high voltage, low-dropout
regulator (LDO) with 150mA sourcing capability. The part is
The output voltage is calculated using Equation 1:
------- + 1
?
Power Dissipation
(EQ. 1)
Δ T J = T J ( MAX ) – T A ( MAX )
qualified to operate over the -40°C to +125°C automotive
temperature range. Featuring ultra-low quiescent current, it
makes an ideal choice for “always-on” automotive applications. It
works well under a “load dump condition” where the input
voltage could rise up to 40V. The LDO continues to operate down
to 3V under a “cold-crank” condition. The device also features
current limit and thermal shutdown protection.
Enable Control
The ISL78301 has an enable pin which turns the device on when
pulled high. When EN is low, the IC goes into shutdown mode and
draws less than 2μA.
Current Limit Protection
The junction temperature must not exceed the range specified in
dissipation can be calculated using Equation 2:
P D = ( V IN – V OUT ) × I OUT + V IN × I GND (EQ. 2)
The maximum allowable junction temperature, T J(MAX) and the
maximum expected ambient temperature, T A(MAX) will determine
the maximum allowable junction temperature rise ( Δ T J ), as shown
in Equation 3:
(EQ. 3)
To calculate the maximum ambient operating temperature, use
the junction-to-ambient thermal resistance ( θ JA ) as shown in
Equation 4:
The ISL78301 has internal current limiting functionality to
protect the regulator during fault conditions. During current limit,
T J ( MAX ) = P D ( MAX ) x θ JA + T A
(EQ. 4)
the output sources a fixed amount of current largely independent
of the output voltage. If the short or overload is removed from
V OUT , the output returns to normal voltage regulation mode.
Thermal Fault Protection
In the event that the die temperature exceeds a typical value of
+165°C, the output of the LDO will shut down until the die
temperature cools down to a typical +145°C. The level of power
dissipated, combined with the ambient temperature and the
thermal impedance of the package, determines if the junction
temperature exceeds the thermal shutdown temperature. See
the “Power Dissipation” section for more details.
Application Information
Input and Output Capacitors
A minimum 0.1μF ceramic capacitor is recommended at the
input for proper operation. For the output, a ceramic capacitor
with a capacitance of 10μF is recommended for the ISL78301 to
maintain stability. The ground connection of the output capacitor
should be routed directly to the GND pin of the device and also
placed close to the IC.
Output Voltage Setting
For the adjustable version of the ISL78301, the output voltage is
programmed using an external resistor divider as shown in
Figure 12.
Board Layout Recommendations
A good PCB layout is important to achieve expected
performance. Consideration should be taken when placing the
components and routing the trace to minimize the ground
impedance and keep the parasitic inductance low. The input and
output capacitors should have a good ground connection and be
placed as close to the IC as possible. The feedback trace in the
adjustable version should be away from other noisy traces.
The 14 Ld HTSSOP package uses the copper area on the PCB as
a heat-sink. The EPAD of this package must be soldered to the
copper plane (GND plane) for effective heat dissipation.
Figure 13 shows a curve for θ JA of the package for different
copper area sizes.
38
36
34
32
30
28
26
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160
EPAD-MOUNT COPPER LAND AREA ON PCB, mm 2
FIGURE 13. θ JA vs EPAD-MOUNT COPPER LAND AREA ON PCB
IN
OUT
C IN
0.1μF
R1
EN
ADJ
(ISL78301)
R2
GND
FIGURE 12. ADJUSTABLE VERSION
8
C OUT
10μF
FN6705.1
December 7, 2013
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL78301FVEAZ-T | 功能描述:IC REG LDO 3.3V .15A 14HTSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:2,000 系列:- 稳压器拓扑结构:正，可调式 输出电压:1.2 V ~ 5 V 输入电压:2.5 V ~ 7 V 电压 - 压降（标准）:0.24V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:1.2A 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-261-5，TO-261AB 供应商设备封装:SOT-223-5 包装:带卷 (TR) 其它名称:*LP3964EMPX-ADJLP3964EMPX-ADJLP3964EMPX-ADJ-NDLP3964EMPX-ADJ/NOPBTR |
| ISL78301FVEBZ | 功能描述:IC REG LDO 5V .15A 14HTSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 稳压器拓扑结构:正，固定式或可调式 输出电压:3.3V，2.5 V ~ 11 V 输入电压:6.5 V ~ 45 V 电压 - 压降（标准）:0.9V @ 400mA 稳压器数量:1 电流 - 输出:400mA（最小） 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-WQFN 裸露焊盘 供应商设备封装:16-TQFN-EP（5x5） 包装:带卷 (TR) |
| ISL78301FVEBZ-T | 功能描述:IC REG LDO 5V .15A 14HTSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:2,000 系列:- 稳压器拓扑结构:正，可调式 输出电压:1.2 V ~ 5 V 输入电压:2.5 V ~ 7 V 电压 - 压降（标准）:0.24V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:1.2A 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-261-5，TO-261AB 供应商设备封装:SOT-223-5 包装:带卷 (TR) 其它名称:*LP3964EMPX-ADJLP3964EMPX-ADJLP3964EMPX-ADJ-NDLP3964EMPX-ADJ/NOPBTR |
| ISL78301FVECZ | 功能描述:IC REG LDO ADJ .15A 14HTSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 稳压器拓扑结构:正，固定式或可调式 输出电压:3.3V，2.5 V ~ 11 V 输入电压:6.5 V ~ 45 V 电压 - 压降（标准）:0.9V @ 400mA 稳压器数量:1 电流 - 输出:400mA（最小） 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-WQFN 裸露焊盘 供应商设备封装:16-TQFN-EP（5x5） 包装:带卷 (TR) |
| ISL78301FVECZ-T | 功能描述:IC REG LDO ADJ .15A 14HTSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:2,000 系列:- 稳压器拓扑结构:正，可调式 输出电压:1.2 V ~ 5 V 输入电压:2.5 V ~ 7 V 电压 - 压降（标准）:0.24V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:1.2A 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-261-5，TO-261AB 供应商设备封装:SOT-223-5 包装:带卷 (TR) 其它名称:*LP3964EMPX-ADJLP3964EMPX-ADJLP3964EMPX-ADJ-NDLP3964EMPX-ADJ/NOPBTR |
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