- 您现在的位置：买卖IC网 > PDF目录178069 > LM2931A (ON SEMICONDUCTOR) 100 mA, Adjustable Output, LDO Voltage Regulator with 60 V Load Dump Protection(100mA，可调输出，带有60V负载保护的低压差稳压器) PDF资料下载
参数资料
| 型号： | LM2931A |
| 厂商： | ON SEMICONDUCTOR |
| 英文描述： | 100 mA, Adjustable Output, LDO Voltage Regulator with 60 V Load Dump Protection(100mA，可调输出，带有60V负载保护的低压差稳压器) |
| 中文描述： | 百毫安，可调输出，LDO稳压器与60伏特抛负载保护（100mA的，可调输出，带有60V的负载保护的低压差稳压器） |
| 文件页数： | 22/23页 |
| 文件大小： | 254K |
| 代理商： | LM2931A |
LM2931, NCV2931 Series
http://onsemi.com
8
,REFERENCE
VOL
TAGE
(V)
ref
VO, OUTPUT VOLTAGE (V)
1.160
1.180
1.200
1.220
1.240
0
3.0
6.0
9.0
12
15
18
21
24
V
18.5
14
t, TIME (10
ms/DIV)
Vout = 5.0 V
RL = 500 W
CO = 100 mF
CO(ESR) = 0.3 W
TA = 25°C
100
0
t, TIME (10
ms/DIV)
VO, OUTPUT VOLTAGE (V)
V
th(on/of
f)
,OUTPUT
INHIBIT
-THRESHOLDS
(V)
2.0
2.1
2.2
0
3.0
6.0
9.0
12
15
18
21
24
Output On"
Output Off"
2.4
2.5
2.6
2.3
LM2931C Adjustable
IO = 10 mA
Vin = Vout + 1.0 V
TA = 25°C
Vin = 14 V
Vout = 5.0 V
Cin = 1000 mF
CO = 100 mF
CO(ESR) = 0.3 W
TA = 25°C
LM2931C Adjustable
IO = 10 mA
Vin = Vout + 1.0 V
TA = 25°C
OUTPUT
CURRENT
,
I
(mA)
out
Δ
OUTPUT
VOL
TAGE
DEVIA
TION,
O
,(2.0
mV/DIV)
V
INPUT
VOL
TAGE,
V
,(V) in
Δ
OUTPUT
VOL
TAGE
DEVIA
TION,
O
,(2.0
mV/DIV)
V
Figure 13. Line Regulation
Figure 14. Load Regulation
Figure 15. Reference Voltage versus Output Voltage
Figure 16. Output InhibitThresholds
versus Output Voltage
APPLICATIONS INFORMATION
The LM2931 series regulators are designed with many
protection features making them essentially blowout
proof. These features include internal current limiting,
thermal shutdown, overvoltage and reverse polarity input
protection, and the capability to withstand temporary
powerup with mirrorimage insertion. Typical application
circuits for the fixed and adjustable output device are shown
The input bypass capacitor Cin is recommended if the
regulator is located an appreciable distance (
≥ 4″) from the
supply input filter. This will reduce the circuit’s sensitivity
to the input line impedance at high frequencies.
This regulator series is not internally compensated and
thus requires an external output capacitor for stability. The
capacitance value required is dependent upon the load
current, output voltage for the adjustable regulator, and the
type of capacitor selected. The least stable condition is
encountered at maximum load current and minimum output
voltage. Figure 22 shows that for operation in the “Stable”
region, under the conditions specified, the magnitude of the
output capacitor impedance |ZO| must not exceed 0.4 W. This
limit must be observed over the entire operating temperature
range of the regulator circuit.
With economical electrolytic capacitors, cold temperature
operation can pose a serious stability problem. As the
electrolyte freezes, around 30
°C, the capacitance will
decrease and the equivalent series resistance (ESR) will
increase drastically, causing the circuit to oscillate. Quality
electrolytic capacitors with extended temperature ranges of
40
° to +85°C and 55° to +105°C are readily available.
Solid tantalum capacitors may be a better choice if small size
is a requirement, however, the maximum
ZO limit over
temperature must be observed.
Note that in the stable region, the output noise voltage is
linearly proportional to
ZO. In effect, CO dictates the high
frequency rolloff point of the circuit. Operation in the area
titled “Marginally Stable” will cause the output of the
regulator to exhibit random bursts of oscillation that decay
in an underdamped fashion. Continuous oscillation occurs
when operating in the area titled “Unstable”. It is suggested
that oven testing of the entire circuit be performed with
maximum load, minimum input voltage, and minimum
ambient temperature.
相关PDF资料 |
PDF描述 |
|---|---|
| LM2931 | 100 mA, Adjustable Output, LDO Voltage Regulator with 60 V Load Dump Protection(100mA，可调输出，带有60V负载保护的低压差稳压器) |
| LM293 | Low Offset Voltage Dual Comparators(低失调电压，2比较器) |
| LM311H | COMPARATOR, 10000 uV OFFSET-MAX, 200 ns RESPONSE TIME, MBCY8 |
| LM311J | COMPARATOR, 10000 uV OFFSET-MAX, 200 ns RESPONSE TIME, CDIP8 |
| LM339 | Single Supply Quad Comparators(四电压比较器) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2931ACD | 功能描述:低压差稳压器 - LDO 3-24V ADJ 100mA 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 |
| LM2931ACD2T5 | 制造商:ON SEMI 功能描述:d(2) pak s/m |
| LM2931ACD2TR4 | 功能描述:低压差稳压器 - LDO 3-24V ADJ 100mA 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 |
| LM2931ACD2TR4G | 功能描述:低压差稳压器 - LDO 3-24V ADJ 100mA w/Load Dump 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 |
| LM2931ACDG | 功能描述:低压差稳压器 - LDO 3-24V ADJ 100mA w/Load Dump 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 |
发布紧急采购，3分钟左右您将得到回复。