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参数资料
| 型号： | REG103FA-2.5 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 2.5 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PSSO5 |
| 封装： | PLASTIC, TO-263, D2PAK, 5 PIN |
| 文件页数： | 26/26页 |
| 文件大小： | 830K |
| 代理商： | REG103FA-2.5 |
REG103
9
SBVS010D
0
2
4
6
8
10
12
14
16
100
10
1
0.1
0.01
0.001
Enable
Current
(
A)
Enable Voltage
FIGURE 5. ENABLE Pin Current versus Applied Voltage.
REG103
ERROR
+5V
10k
Pull-up
3
ENABLE
SO-8 Package
Only
6
Open
Drain
P
FIGURE 6. ERROR Pin Typical Fault-Monitoring Circuit.
ENABLE
The ENABLE pin allows the regulator to be turned on and
off. This pin is active HIGH and compatible with standard
TTL-CMOS levels. Inputs below 0.5V (max) turn the regu-
lator off and all circuitry is disabled. Under this condition,
ground pin current drops to approximately 0.5
A. When not
used, the ENABLE pin may be connected to VIN.
Internal to the part, the ENABLE pin is connected to an
input resistor-zener diode circuit, as shown in Figure 4,
creating a nonlinear input impedance. The ENABLE Pin
Current versus Applied Voltage relationship is shown in
Figure 5. When the ENABLE pin is connected to a voltage
greater than 10V, a series resistor may be used to limit the
current.
ENABLE
V
Z = 10V
175k
FIGURE 4. ENABLE Pin Equivalent Input Circuit.
FIGURE 3. Foldback Current Limit and Boost Circuit.
0
100
200
300
400
500
600
700
800
3.5
3
2.5
2
1.5
1
0.5
0
Output
Voltage
(V)
Output Current (mA)
REG103
V
IN
0.1
F
Gnd
R
BOOST
V
OUT
+
0.1
F(1)
Load
+
(1) Optional.
(a) Foldback Current Limit of the REG103-3.3 at 25
°C.
(b) Foldback Current Boost Circuit.
ERROR FLAG
The error indication pin, only available on the SO-8 package
version, provides a fault indication out-of-regulation condi-
tion. During a fault condition, ERROR is pulled LOW by an
open drain output device. The pin voltage, in the fault state,
is typically less than 0.2V at 500
A.
A fault condition is indicated when the output voltage differs
(either above or below) from the specified value by approxi-
mately 10%. Figure 6 shows a typical fault-monitoring
application.
OUTPUT NOISE
A precision band-gap reference is used for the internal
reference voltage, VREF, for the REG103. This reference is
the dominant noise source within the REG103. It generates
approximately 45
Vrms in the 10Hz to 100kHz bandwidth
at the reference output. The regulator control loop gains up
the reference noise, so that the noise voltage of the regulator
is approximately given by:
V
Vrms
RR
R
Vrms
V
N
OUT
REF
=
+
=
45
2
45
12
相关PDF资料 |
PDF描述 |
|---|---|
| REG103FA-2.7 | 2.7 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PSSO5 |
| REG103FA-3.3/500 | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PSSO5 |
| REG103FA-3.3 | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PSSO5 |
| REG103GA-3.3 | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PDSO6 |
| REG103GA-5/2K5 | 5 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| REG103FA-3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| REG103FA3.3 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| REG103FA-3.3 | 制造商:BB 制造商全称:BB 功能描述:DMOS 500mA Low Dropout Regulator |
| REG103FA-3.3/500 | 功能描述:低压差稳压器 - LDO DMOS 500mA LDO Reg RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| REG103FA-3.3/500G3 | 功能描述:低压差稳压器 - LDO DMOS 500mA LDO Reg RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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