参数资料
型号: LTC2903IS6-D1#TRPBF
厂商: Linear Technology
文件页数: 1/16页
文件大小: 0K
描述: IC QUAD SPLY MONITOR ADJ SOT23-6
标准包装: 2,500
类型: 多压监控器
监视电压数目: 4
输出: 开路漏极或开路集电极
复位: 低有效
复位超时: 最小为 140 ms
电压 - 阀值: 3.086V,可调,可调,可调
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-23-6
包装: 带卷 (TR)
LTC2903-1
Precision Quad Supply
Monitor in 6-Lead SOT-23
FEATURES
DESCRIPTIO
Ultralow Voltage Reset: V CC = 0.5V Guaranteed
Monitor Four Inputs Simultaneously
3.3V, 2.5V, 1.8V, ADJ (LTC2903-A1)
5V, 3.3V, 2.5V, 1.8V (LTC2903-B1)
5V, 3.3V, 1.8V, –5.2V (LTC2903-C1)
3.3V, ADJ, ADJ, ADJ (LTC2903-D1)
5V, ADJ, ADJ, ADJ (LTC2903-E1)
Guaranteed Threshold Accuracy: ± 1.5% of
Monitored Voltage over Temperature
10% (A1, B1, C1) and 5% (D1, E1) Undervoltage
Monitoring
Low Supply Current: 20 μ A Typical
200ms Reset Time Delay
Active Low Open-Drain RST Output
Power Supply Glitch Immunity
Low Profile (1mm) SOT-23 (ThinSOT TM ) Package
The LTC ? 2903-1 monitors up to four supply voltages. The
common reset output remains low until all four inputs
have been in compliance for 200ms. Voltage thresholds
maintain ± 1.5% accuracy over temperature (with respect
to the monitored voltage). The LTC2903-1 features an
open-drain RST output with a weak internal pullup.
Internal supply voltage (V CC ) is generated from the greater
voltage on the V1, V2 inputs. V CC = V1 for LTC2903-D1 and
LTC2903-E1. The RST output is guaranteed to sink at least
5 μ A (V OL = 0.15V) for V CC down to 0.5V and will typically
conduct current down to 0V. Quiescent current is 20 μ A
typical, making the LTC2903-1 ideal for power conscious
systems. The LTC2903-1 is available in a 6-lead low profile
(1mm) SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
APPLICATIO S
Multivoltage Systems
Optical Networking Systems
Cell Phone Base Stations
Network Servers
TYPICAL APPLICATIO
Low Voltage Reset Pull-Down Performance
vs External Pull-Up Current and Input Supply Voltage
5V
0.10
0.09
V IN = V1 = V2 = V3
LTC2903-B1
DC/DC
CONVERTER
3.3V
2.5V
1.8V
LTC2903-B1
SYSTEM
LOGIC
0.08
0.07
0.06
0.05
20 μ A
10 μ A
C1
0.1 μ F
C2
0.1 μ F
V1
GND
V2
RST
V4
V3
2903 TA01
0.04
0.03
0.02
0.01
0
5 μ A
2 μ A
1 μ A
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
V IN , INPUT SUPPLY VOLTAGE (V)
2903 TA01b
29031f a
1
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