参数资料
型号: TPS2105DRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, PDSO8
封装: PLASTIC, SOIC-8
文件页数: 4/16页
文件大小: 240K
代理商: TPS2105DRG4
TPS2104, TPS2105
VAUX POWER-DISTRIBUTION SWITCHES
SLVS235A – SEPTEMBER 1999 – REVISED APRIL 2000
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 17
280
240
200
–40
–10
20
50
IN1-OUT
On-State
resistance
320
IN1-OUT ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
360
80
110
140
r
on
m
TJ – Junction Temperature – °C
VI(IN1) = 2.7 V
VI(IN1) = 3.3 V
VI(IN1) = 4 V
VI(IN1) = 5 V
VI(IN1) = 5.5 V
Figure 18
1.5
1
0.5
–40
–10
20
50
2
2.5
IN2-OUT ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
3
80
110
140
IN1-OUT
On-State
resistance
r
on
VI(IN2) = 3.3 V
VI(IN2) = 2.7 V
TJ – Junction Temperature – °C
VI(IN2) = 5.5 V
VI(IN2) = 5 V
VI(IN2) = 4 V
APPLICATION INFORMATION
EN
IN1
IN2
OUT
GND
5 V VAUX
5 V VCC
CardBus or System Controller
TPS2104
0.22
F
0.22
F
1
F
xx
F
5 V
Figure 19. Typical Application
power-supply considerations
A 0.22-
F ceramic bypass capacitor between IN and GND, close to the device is recommended. The output
capacitor should be chosen based on the size of the load during the transition of the switch. A 220-
F capacitor
is recommended for 100-mA loads. Typical output capacitors (xx
F, shown in Figure 19) required for a given
load can be determined from Figure 11 which shows the output voltage droop when output is switched from IN2
to IN1. The output voltage droop is insignificant when output is switched from IN1 to IN2. Additionally, bypassing
the output with a 1-
F ceramic capacitor improves the immunity of the device to short-circuit transients.
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