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参数资料
| 型号： | LTC2908ITS8-B1#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC MON SIX SUPPLY PREC TSOT23-8 |
| 标准包装： | 500 |
| 类型： | 多压监控器 |
| 监视电压数目： | 6 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 160 ms |
| 电压 - 阀值： | 1.403V，1.683V，2.338V，3.086V，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-23-8 薄型，TSOT-23-8 |
| 供应商设备封装： | TSOT-23-8 |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC2908ITS8-B1#PBF LTC2908ITS8-B1#PBF-ND |
LTC2908
TYPICAL PERFORMANCE CHARACTERISTICS
Speci?cations are at T A = 25°C unless otherwise noted.
RST Pull-Up Current vs
Supply Voltage
RST Output Voltage High vs
RST Output Source Current
LTC2908-A1
–30
–25
–20
V CC = V1 = V2 (A1/B1), V CC = V1(C1)
V3 = 2.5V (A1)/V3 = 1.8V (B1)
V4 = 1.8V (A1)/V4 = 1.5V (B1)
V ADJ1 = V ADJ2 = 0.55V (A1/B1)
V ADJ1 = V ADJ2 = V ADJ3 = V ADJ4 =
V ADJ5 = 0.55V(C1)
RST HELD AT 0V
5
4
–15
V RT25
LTC2908-C1
3
25°C
–10
V RT33
LTC2908-B1
2
V1 = 5.0V
V2 = 3.3V
–40°C
85°C
–5
V3 = 2.5V
0
1.5
2
2.5
3
3.5
V RT50
LTC2908-A1
4 4.5
5
1
0
V4 = 1.8V
V ADJ1 = V ADJ2 = 0.55V
–4 –8
–12
–16
–20
SUPPLY VOLTAGE, V CC (V)
2908 G20
OUTPUT SOURCE CURRENT, I RST (μA)
2908 G21
3.0
RST Output Voltage High vs
RST Output Source Current
LTC2908-B1
2.0
RST Output Voltage High vs
RST Output Source Current
LTC2908-C1
2.5
1.5
2.0
25°C
85°C
1.5
V1 = 3.3V
–40°C
85°C
1.0
V2 = 2.5V
V ADJ4 = V ADJ5 = 0.55V
1.0 V3 = 1.8V
V4 = 1.5V
V ADJ1 = V ADJ2 = 0.55V
0.5
0 –2 –4 –6 –8 –10 –12
OUTPUT SOURCE CURRENT, I RST (μA)
0.5
– 40°C
V1 = 2.5V
V ADJ1 = V ADJ2 = V ADJ3 =
25°C
0 –1 –2 –3 –4 –5 –6 –7
OUTPUT SOURCE CURRENT, I RST (μA)
–8
2908 G22
2908 G24
PIN FUNCTIONS
(TS8 Package/DDB8 Package) LTC2908-A1/LTC2908-B1
V2 (Pin 1/Pin 4): Voltage Input 2. The greater of V1, V2 is
also the internal V CC . The operating voltage on this pin shall
not exceed 6V. When in normal operation (V1 > V2), this pin
draws approximately 8μA. When this pin is acting as the
V CC (V2 > V1), this pin draws an additional 16μA. Bypass
this pin to ground with a 0.1μF (or greater) capacitor.
V4 (Pin 2/Pin 3): Voltage Input 4.
RST (Pin 3/Pin 2): Reset Logic Output. Pulls low when
any voltage input is below the reset threshold and is held
low for 200ms after all voltage inputs are above threshold.
This pin has a weak pull-up to V CC and may be pulled above
V CC using an external pull-up.
GND (Pin 4/Pin 1): Device Ground.
V ADJ2 (Pin 5/Pin 8): Adjustable Voltage Input 2. See Table 1
for recommended ADJ resistors values.
V3 (Pin 6/Pin 7): Voltage Input 3.
V ADJ1 (Pin 7/Pin 6): Adjustable Voltage Input 1. See Table 1
for recommended ADJ resistors values.
V1 (Pin 8/Pin 5): Voltage Input 1. The greater of V1, V2 is
also the internal V CC . The operating voltage on this pin shall
not exceed 6V. When in normal operation (V1 > V2), this pin
draws approximately 26 μA. When this pin is not acting as
the V CC (V2 > V1), this pin draws approximately 8μA. Bypass
this pin to ground with a 0.1μF (or greater) capacitor.
Exposed Pad (Pin 9, DDB8 Only): Exposed pad may be
left open or connected to device ground.
2908fd
7
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