参数资料
| 型号： | ISL78310ARAJZ |
| 厂商： | Intersil |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1A 10DFN |
| 标准包装： | 100 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.8 V ~ 5 V |
| 输入电压： | 2.2 V ~ 6 V |
| 电压 - 压降（标准）： | 0.13V @ 1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A（最小值） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 管件 |
ISL78310
C SS x0.5V
t RAMP = -------------------------
2 μ A
Current Limit Protection
The ISL78310 LDO incorporates protection against overcurrent
due to any short or overload condition applied to the output pin.
The current limit circuit performs as a constant current source
when the output current exceeds the current limit threshold
noted in the “Electrical Specifications” table on page 5. If the
short or overload condition is removed from V OUT , then the
output returns to normal voltage mode regulation. In the event of
an overload condition on the DFN package, the LDO will begin to
cycle on and off due to the die temperature exceeding thermal
fault condition.
Functional Description
Enable Operation
The Enable turn-on threshold is typically 0.8V with a hysteresis of
80mV. The Enable pin does not have an internal pull-up or
pull-down resistor. As a result, this pin must not be left floating.
This pin must be tied to V IN if it is not used. A pull-up resistor
(typically 1k Ω to 10k Ω) will be required for applications that use
open collector or open drain outputs to control the Enable pin.
FIGURE 14. IN-RUSH CURRENT WITH NO C SS ,
C OUT = 1000μF, IN-RUSH CURRENT = 1.8A
The Enable pin may be connected directly to V IN for applications
that are always on.
Soft-Start Operation
The soft-start circuit controls the rate at which the output voltage
rises up to regulation at power-up or LDO enable. This start-up
ramp time can be set by adding an external capacitor from the
SS pin to GND. An internal 2 μA current source charges up this
C SS and the feedback reference voltage is clamped to the
voltage across it. The startup time of the regulator output voltage
for a given C SS value can be calculated using Equation 2.
(EQ. 2)
The soft-start function also effectively limits the amount of in-
rush current to less than the programmed current limit during
start-up or an enable sequence, to avoid an over current fault
condition. This can be an issue for applications that require large,
external bulk capacitances on V OUT where high levels of charging
current can be seen for a significant period of time. High in-rush
currents can cause V IN to drop below minimum, which could
cause V OUT to shutdown.
FIGURE 15. IN-RUSH CURRENT WITH C SS = 15nF, C OUT = 1000μF,
IN-RUSH CURRENT = 0.5A
FIGURE 16. IN-RUSH CURRENT WITH C SS = 33nF, C OUT = 1000μF, IN-RUSH CURRENT = 0.2A
10
FN7810.1
December 23, 2013
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相关代理商/技术参数 |
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| ISL78310ARAJZ-T | 功能描述:IC REG LDO ADJ 1A 10DFN 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) |
| ISL78310ARAJZ-TR5303 | 制造商:Intersil Corporation 功能描述: 制造商:Intersil Corporation 功能描述:HIGH PERFORMANCE SINGLE 1A, ADJUSTABLE VOUT LDO - 3X3 10LD - Tape and Reel |
| ISL78322ARZ | 功能描述:IC REG BUCK SYNC ADJ DL 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
| ISL78322ARZ-T | 功能描述:IC REG BUCK SYNC ADJ DL 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
| ISL78322ARZ-TR5303 | 制造商:Intersil Corporation 功能描述: |
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