- 您现在的位置：买卖IC网 > PDF目录79889 > LTC2914HDHC-1 (LINEAR TECHNOLOGY CORP) 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 PDF资料下载
参数资料
| 型号： | LTC2914HDHC-1 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | 5 X 3 MM, PLASTIC, MO-229WJED-1, DFN-16 |
| 文件页数： | 2/16页 |
| 文件大小： | 211K |
| 代理商： | LTC2914HDHC-1 |
LTC2914
10
2914fa
Power-Up/Power-Down
As soon as VCC reaches 1V during power-up, the UV output
asserts low and the OV output weakly pulls to VCC.
The LTC2914 is guaranteed to assert UV low and OV high
under conditions of low VCC, down to VCC = 1V. Above VCC =
2V (2.1V maximum) the VH and VL inputs take control.
Once all VH inputs and VCC become valid an internal timer
is started. After an adjustable delay time, UV weakly pulls
high.
Threshold Accuracy
Reset threshold accuracy is important in a supply-sensitive
system. Ideally, such a system resets only if supply voltages
fall outside the exact thresholds for a specied margin.
All LTC2914 inputs have a relative threshold accuracy of
±1.5% over the full operating temperature range.
For example, when the LTC2914 is programmed to moni-
tor a 5V input with a 10% tolerance, the desired UV trip
point is 4.5V. Because of the ±1.5% relative accuracy of
the LTC2914, the UV trip point is between 4.433V and
4.567V which is 4.5V ±1.5%.
Likewise, the accuracy of the resistances chosen for RA,
RB and RC affect the UV and OV trip points as well. Us-
ing the example just given, if the resistances used to set
the UV trip point have 1% accuracy, the UV trip range is
between 4.354V and 4.650V. This is illustrated in the fol-
lowing calculations.
The UV trip point is given as:
VUV = 0.5V 1+
RC
RA +RB
The two extreme conditions, with a relative accuracy of
1.5% and resistance accuracy of 1%, result in:
VUV(MIN) = 0.5V 0.985 1+
RC 0.99
RA +RB
()1.01
and
VUV(MAX) = 0.5V 1.015 1+
RC 1.01
RA +RB
()0.99
For a desired trip point of 4.5V,
RC
RA +RB
= 8
Therefore,
VUV(MIN) = 0.5V 0.985 1+ 8
0.99
1.01
= 4.354V
and
VUV(MAX) = 0.5V 1.015 1+ 8
1.01
0.99
= 4.650V
Glitch Immunity
In any supervisory application, noise riding on the moni-
tored DC voltage causes spurious resets. To solve this
problem without adding hysteresis, which causes a new
error term in the trip voltage, the LTC2914 lowpass lters
the output of the rst stage comparator at each input. This
lter integrates the output of the comparator before as-
serting the UV or OV logic. A transient at the input of the
comparator of sufcient magnitude and duration triggers
the output logic. The Typical Performance Characteristics
section shows a graph of the Transient Duration vs Com-
parator Overdrive.
APPLICATIONS INFORMATION
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3891EFE#PBF | SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PDSO20 |
| LSM-1.5/10-D3-C | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| LK4003-9RV2TB1 | 1-OUTPUT AC-DC PWR FACTOR CORR MODULE |
| LKP5740-7ERD1TB1 | 2-OUTPUT 250 W AC-DC PWR FACTOR CORR MODULE |
| LM3622M-8.4/NOPB | BATTERY CHARGE CONTROLLER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2914HDHC-1#PBF | 功能描述:IC VOLT MONITOR QUAD 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC2914HDHC-1#TRPBF | 功能描述:IC VOLT MONITOR QUAD 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC2914HDHC-2#PBF | 功能描述:IC VOLT MONITOR QUAD 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC2914HDHC-2#TRPBF | 功能描述:IC VOLT MONITOR QUAD 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC2914HGN-1#PBF | 功能描述:IC VOLT MONITOR QUAD 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
发布紧急采购，3分钟左右您将得到回复。